Information
-
Patent Grant
-
6758576
-
Patent Number
6,758,576
-
Date Filed
Monday, November 4, 200221 years ago
-
Date Issued
Tuesday, July 6, 200420 years ago
-
Inventors
-
-
Examiners
- O'Shea; Sandra
- Zeade; Bertrand
Agents
- Chan; Raymond Y.
- David and Raymond Patent Group
-
CPC
-
US Classifications
Field of Search
US
- 362 216
- 362 226
- 362 225
- 362 238
- 362 239
- 362 249
- 362 257
- 362 265
- 362 227
- 362 486
- 362 399
- 362 240
- 362 260
- 362 252
-
International Classifications
-
Abstract
A portable stack lamp includes a base supported by a supporting device, such as an extensible tripod and a plurality of rolling wheels, two or more lamp units stacked up to form a stack-up lamp body mounted on said base, and a cover which is adapted to cover a top opening of the housing of the lamp unit having a handle affixed thereon. The portable stack lamp is arranged to provide 360 degrees illumination so as to produce luminous beams in all directions while the user is able to selectively increase or decrease its luminous intensity by simply stacking up more or less lamp unit easily anytime. Therefore, the portable stack lamp can illuminate the surrounding that not only minimizes the number of work lamps to be used but also saves both the electrical energy and illumination cost. Moreover, each of the lamp unit of the portable stack lamp is arranged to equip a ring type fluorescent bulb as a light source so that it can be used indoor while consuming less electrical energy than the incandescent bulb or halogen bulb of the conventional work lamp.
Description
BACKGROUND OF THE PRESENT INVENTION
1. Field of Invention
The present invention relates to work lamps, and more particularly to a portable stack lamp which not only provides 360 degrees illumination but also is capable of being stacked up to increase lighting intensity.
2. Description of Related Arts
Table lamp, floor lamp, ceiling lamp, and etc. are common types of indoor lighting fixtures. Lantern lamp and spot light are outdoor lighting fixtures that generally use incandescent bulbs and halogen bulbs for illumination. Therefore, these outdoor lamps are most usually used as work lamps to provide supplemental illumination in working environments such as auto shops and factories.
Portability is the primary feature of a work lamp so that it is handy for the user to carry elsewhere for use. Therefore, both the lantern lamp and spot lamp are compact in size for easy carry from place to place. However, the user must hand carry the work lamp or hang it up near the workplace for illumination.
The luminous intensity of the conventional work lamp is limited to the power of light bulb. If a 60-watt incandescent bulb or halogen bulb is used in the lantern lamp or spot lamp, there is no way to increase or decrease the luminous intensity unless replacing the light bulb with one having a higher or lower watt.
Since reflection disc is generally mounted behind the light bulb of the convention work lamp to reflect light beam to enhance luminous intensity, either the lantern lamp or the spot lamp can only emit luminous beam in a single direction that may limit the work lamp's application and require the user to rotate the entire work lamp by hand to direct the light beam to the area where the user wants to illuminate.
Due to the safety concern that the halogen work lamp produces great amount of heat during illumination, it not only wastes energy but also renders the halogen work lamp not being allowed to be used indoor.
SUMMARY OF THE PRESENT INVENTION
It is a main object of the present invention to provide a portable stack lamp which is arranged to provide 360 degrees illumination so as to produce luminous beams in all directions. Therefore, one portable stack lamp can illuminate the surrounding that not only minimizes the number of work lamps to be used but also saves both the electrical energy and illumination cost.
It is another object of the present invention to provide a portable stack lamp which arrangement successfully equips a ring type fluorescent bulb as the light source in each lamp unit so that it can be used indoor while consuming less electrical energy than the incandescent bulb or halogen bulb of the conventional work lamp.
It is another object of the present invention to provide a portable stack lamp wherein the circular central lamp mount which is used to support the ring type fluorescent bulb therearound is used, at the same time, as a reflective ring to reflect all light beams radially outwards.
It is another object of the present invention to provide a portable stack lamp which enables the user to selectively increase or decrease its luminous intensity by simply stacking up more or less lamp unit easily anytime.
It is another object of the present invention to provide a portable stack lamp which fluorescent bulb is arranged to be easily reached and replaced, wherein the user has no need to detach all upper lamp units one by one and merely requires to unassemble the lamp unit attached on top of the lamp unit to be repaired in order to reach the fluorescent bulb therein.
It is another object of the present invention to provide a portable stack lamp which can stand on floor, support at an adjustable height and is easy to carry and roll from place to place effortlessly.
In order to accomplish the above objects, the present invention provides a portable stack lamp, comprising:
a base having a top mounting surface and a bottom supporting surface;
means for supporting the base being detachably attached to the bottom supporting surface of the base;
at least a lamp unit which comprises:
a housing which is a circular disc having a bottom wall and a surrounding wall made of transparent material;
a ring-shaped lamp mount, which is attached to a central portion of the bottom wall of the housing, having a circular outer light reflective surface and defining a receiving chamber therein and a light source chamber between the light reflective surface and the surrounding wall of the housing;
a ring type fluorescent bulb having a diameter smaller than the housing and larger than the lamp mount and a height smaller than the surrounding wall of the housing;
means for mounting the fluorescent bulb around the lamp mount inside the light source chamber of the housing;
a control circuit, which is disposed in the receiving chamber, comprising a power connector detachably connected to the fluorescent bulb, a power input terminal for electrically connecting to a power source to supply electricity to the fluorescent bulb, and a power output terminal for extended electrical connection;
a bottom attachment fastener provided at a bottom portion of the housing; and
a top attachment fastener provided at a top portion of the housing; and
a cover adapted to cover a top opening of the housing of the lamp unit;
wherein when only one lamp unit is used, the bottom attachment fastener thereof is attached to the top mounting surface of the base and the top attachment fastener is attached to the cover;
in which when two more lamp units are used, the bottom attachment fastener of the bottom layer of lamp unit is attached to the top mounting surface of the base and the bottom attachment fastener of an upper layer of lamp unit is detachably fastened to the top attachment fastener of the lower neighboring layer of lamp unit so as to stack up the lamp units in a layer on layer manner, wherein the cover is attached to the top attachment fastener of the topmost layer of lamp unit to construct the portable stack lamp of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a perspective view of a portable stack lamp according to a preferred embodiment of the present invention.
FIG. 2
is an exploded perspective view of the portable stack lamp according to the above preferred embodiment of the present invention.
FIG. 3
is a perspective view of the portable stack lamp illustrating the top layer of lamp unit and the cover separately according to the above preferred embodiment of the present invention.
FIG. 4
is a perspective view of the portable stack lamp illustrating how to replace the fluorescent bulb of a bottom layer of lamp unit according to the above preferred embodiment of the present invention.
FIG. 5
is top perspective view of the lamp unit of the portable stack lamp according to the above preferred embodiment of the present invention.
FIG. 6
is a bottom perspective view of the portable stack lamp according to the above preferred embodiment of the present invention, wherein the rolling wheels are replaced with floor stands.
FIG. 7
is a perspective of the portable stack lamp according to an alternative mode of the above preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to
FIGS. 1
to
7
, a portable stack lamp according to a preferred embodiment of the present invention is illustrated, which comprises a base
10
, a cover
20
and one or more layers of lamp unit
30
mounted between the base
10
and the cover
20
.
As shown in
FIGS. 1
,
2
,
4
, and
6
, the base
10
has a top mounting surface
11
and a bottom supporting surface
12
. The base
10
further provides with a base attachment fastener
13
which includes a plurality of arc-shape attachment slots
131
circularly and spacedly aligned on the base
10
. Each of the attachment slots
131
has an indention
132
formed along a middle portion of an outer elongated side thereof. The base
10
further comprises an elongaged electric cord
14
having one end connected with a terminal connector
141
, which is extended to mount on the top mounting surface
11
of the base, and another end connected with an electric plug
142
for connecting to a power supply.
Referring to
FIGS. 2
,
4
and
5
, each of the lamp units
30
comprises a housing
31
, a ring-shaped lamp mount
32
, a light source
33
, a control circuit
34
, a bottom attachment fastener
35
, and a top attachment fastener
36
.
The housing
31
, which is a plastic made transparent circular disc having a U-shaped cross section, has a bottom wall
311
and a surrounding wall
312
. The lamp mount
32
is a ring-shaped body which bottom end inwardly protruded a plurality of fastening lips
321
for fastening on a central portion of the bottom wall
311
of the housing
31
by screws so as to integrally and coaxially fasten the lamp mount
32
on the bottom wall
311
. The lamp mount
32
further comprises a plurality of holder heads
322
integrally and spacedly protruded on an upper portion of the outer peripheral surface of the lamp mount
32
. The lamp mount
32
has a circular outer light reflective surface
323
and defines a receiving chamber
324
therein and a light source chamber
37
between the light reflective surface
323
and the surrounding wall
312
of the housing
31
.
The lamp unit
30
further comprises a mounting device
38
for supporting the light source
33
around the lamp mount
32
inside the light source chamber
37
of the housing
31
, so that the light beams emitted from the light source around the lamp mount
32
illuminate all directions through the surrounding wall
312
while the reflective surface
323
ensures all light beams being radially directed outwards.
According to the preferred embodiment of the present invention, the light source
33
is embodied as a ring type fluorescent bulb having a diameter smaller than the housing
31
and larger than the lamp mount
32
and a height smaller than the surrounding wall
312
of the housing
31
. The mounting device
38
includes a plurality of U-shaped holder mounts
381
having one end connected to the holder heads
322
respectively. Therefore, the ring type fluorescent bulb
33
is supported by sitting on the holder mounts
381
and the U-shaped holder mounts
381
are fittingly clipped on the body of the fluorescent bulb
33
spacedly so as to evenly support the weight of the fluorescent bulb
33
within the light source chamber
37
. Accordingly, the ring type fluorescent bulb
33
is extended around the housing
31
and emits luminous beams outside in 360 degrees through circular surrounding wall
312
. At the same time, the luminous beams emits inwardly from the inner peripheral edge of the fluorescent bulb
33
are all reflected radially outwards by the reflective surface
323
of the lamp mount
32
.
The control circuit
34
is disposed in the receiving chamber
324
and mounted on the bottom wall
311
of the housing for controlling the power supply and illumination of the fluorescent bulb
33
. The control circuit
34
of the preferred embodiment should include a power connector
341
detachably connected to a power input terminal
331
to supply power for the light source
33
, a power input terminal
342
for electrically connecting with the power source to supply electricity (as shown in FIG.
4
), and a power output terminal
343
for providing an electrical connection with another lamp unit
30
(if any) of the stack lamp of the present invention (as shown in FIG.
5
). For fluorescent bulb, the power connector
341
should include a starter to light up the fluorescent bulb
33
.
As shown in
FIGS. 2 and 4
, the bottom attachment fastener
35
of each of the lamp units
30
is provided at a bottom portion of the housing
31
thereof. The bottom attachment fastener
35
includes a plurality of arc-shaped attachment ribs
351
integrally and downwardly protruded from the bottom wall
311
of the housing
31
. The arc-shaped attachment ribs
351
are spacedly aligned along a peripheral edge of the bottom wall. On each of the attachment ribs
351
, an engagement knob
352
is protruded from a middle portion of the outer surface thereof that defines an engagement gap
353
between the engagement knob
352
and the bottom edge of the surrounding wall
312
. In addition, a threaded hole
353
is formed adjacent to the engagement gap
353
on each of the attachment ribs
351
.
As shown in
FIG. 6
, in order to mount a lamp unit
30
on the base
10
to function as bottom layer of lamp unit
30
, the user may simply insert the arc-shaped attachment ribs
351
of the lamp unit
30
through the arc-shaped attachment slots
131
respectively while aligning the engagement knobs
352
with the indentions
132
, wherein the length of the attachment slot
131
should be longer than that of the attachment rib
351
. After the engagement knobs
352
pass through the attachment slots
131
, the user can simply rotate the lamp unit
30
until the engagement knobs
352
are disaligned with the indentions
132
so as to engage the base
10
between the bottom wall
311
of the lamp unit
31
and the attachment knobs
352
. Of course, other connection methods, such as screwing, clipping and gluing, can be used to connect the lamp unit
30
to the base
10
. It is also worth to mention that, when the bottom wall
311
of the lamp unit
30
is constructed strong and rigid enough, the bottom wall
311
can be functioned as the base
10
of the stack lamp of the present invention too.
As shown in
FIGS. 2 and 4
, the top attachment fastener
36
of each of the lamp units
30
is provided at a top portion of the housing
31
thereof. The top attachment fastener
36
has a plurality of L-shaped engagement slots
361
formed on a top side of the surrounding wall
312
of the housing
31
. Each of the engagement slots
361
has a vertical portion downwardly extended from a top edge of the surrounding wall
312
and a transversal portion horizontally extended from a bottom of the vertical portion on the surrounding wall
312
of the housing, so as to define an edge tongue
362
above the transversal portion of the respective engagement slot
361
, wherein the width of the engagement slot
361
is equal to or slightly smaller than a size of the engagement knob
352
.
Therefore, in order to stack up a lamp unit
30
on top of another one coaxially, the user merely needs to overlappedly stack an upper lamp unit
30
on another lower lamp unit
30
while aligning the engagement knobs
352
with the engagement slots
361
respectively. The distance between two opposing attachment ribs
351
should be arranged to be slightly smaller than an inner diameter of the top rim of the surrounding wall
312
, so that the attachment ribs
351
can be inserted in the light source chamber
37
. Then, when the top edge of the surrounding wall
312
of the lower lamp unit
30
supports against the bottom wall
311
of the upper lamp unit
30
, the engagement knobs
352
are positioned at the bottom end of the vertical portions of the engagement slots
361
respectively. To lock the connection, the user merely needs to rotate the upper lamp unit
30
with respect to the lower lamp unit
30
to transversally drive the engagement knobs
352
into the transversal portions of the engagement slots
361
so that the edge tongues
362
of the top attachment fastener
36
of the lower lamp unit
30
are engaged between the engagement knobs
352
and the bottom wall
311
of the upper lamp unit
30
while the threaded holes
353
of the attachment ribs
351
are aligned at the vertical portions of the engagement slots
361
respectively. Therefore, in order to enhance the connection between the upper and lower lamp units
30
, a plurality of fastening screws
39
each having an enlarged head is screwed into the threaded holes
353
until the enlarged heads are pressed against the surrounding wall
312
of the lower lamp unit
30
so as to further fasten the attachment ribs
351
of the upper lamp unit
30
with the surrounding wall
312
of the lower lamp unit
30
.
In order words, the lamp units
30
can thus be stacked up in a layer on layer manner to form a stack-up lamp body. It is worth that it would be an apparent alternative mode to replace the arrangements of the bottom attachment fastener
35
and the top attachment fastener
36
with each other.
As shown in
FIGS. 2 and 3
, the cover
20
is adapted to cover a top opening
313
of the housing
31
of the topmost lamp unit
30
. According to the preferred embodiment of the present invention, the cover
20
also comprises a cover attachment fastener
21
which is constructed identical to the bottom attachment fastener
35
of each of the lamp unit
30
, so that the cover attachment fastener
21
can be fastened with the top attachment fastener
36
of any of the lamp units
30
like how the bottom attachment fastener
35
of the upper lamp unit
30
is connected with the top attachment fastener
36
of the lower lamp unit
30
as described above.
The cover
20
is preferred to further include a handle
22
pivotally affixed thereon for the user to hand carry the stack lamp from place to place. A handle recess
23
is formed on the cover
20
to receive the handle
22
when it is folded down.
When only one lamp unit
30
is used, the bottom attachment fastener
35
thereof is attached to the top mounting surface
11
of the base
10
as described above and the top attachment fastener
36
is connected to the cover attachment fastener
21
of the cover
20
.
When two more lamp units
30
are used, as shown in
FIGS. 1
to
5
, the bottom attachment fastener
35
of the bottom layer of lamp unit
30
is mounted on the top mounting surface
11
of the base
10
and the bottom attachment fastener
35
of an upper layer of lamp unit
30
is detachably fastened to the top attachment fastener
36
of the lower neighboring layer of lamp unit
30
so as to stack up the lamp units
30
in a layer on layer manner, wherein the cover
20
is attached to the top attachment fastener
36
of the topmost layer of lamp unit
30
to construct the portable stack lamp of the present invention as shown in FIG.
1
.
In view of above, the portable stack lamp of the present invention is arranged to enable a ring type fluorescent bulb
33
to be equipped as the light source in each lamp unit so that it can be used indoor while consuming less electrical energy than the incandescent bulb or halogen bulb of the conventional work lamp. Moreover, the circular central lamp mount which is used to support the ring type fluorescent bulb therearound is used, at the same time, as a reflective ring to reflect all light beams radially outwards.
All lamp units
30
have the same structure, so that the user is free to select the number of lamp units
30
to purchase. When the user needs more luminous intensity, the user can simply stack more lamp units
30
up. When the user wants to reduce the luminous intensity, the user can detach the desired number of lamp units
30
easily anytime.
When the fluorescent bulb
33
of any lamp unit
30
is broken, the user has no need to detach all upper lamp units one by one. The user of the present invention merely needs to unassemble the lamp unit
30
attached on top of the lamp unit
30
to be repaired in order to reach the fluorescent bulb
33
therein, as shown in FIG.
4
.
The portable stack lamp of the present invention further comprises a supporting device
40
for supporting the base
10
, which is detachably attached to the bottom supporting surface
12
of the base
10
. Referring to
FIGS. 1
to
5
, for ease of transportation, the supporting device
40
includes a plurality of rolling wheels
41
affixed to the bottom supporting surface
12
of the base
10
so that the user can roll it from place to place effortless.
As shown in
FIG. 6
, the rolling wheels
41
can be replaced with floor stands
42
which are firmly screwed to the bottom supporting surface
12
of the base
10
to steadily support the portable stack lamp on a slippery surface.
As shown in
FIG. 7
, an alternative mode of the supporting device
40
′ is illustrated, which includes an extensible tripod
43
′ to stand the portable stack lamp on floor. The tripod
43
′ comprises a foldable tripod base
431
′ and an extensible post
432
′ upwardly extended from the foldable tripod base
431
′, wherein a top end of the extensible post
432
′ is detachably fastened to the bottom supporting surface
12
of the base
10
, so that the user is capable of adjusting the illuminating height of the portable stack lamp.
Claims
- 1. A stack lamp, comprising:two or more lamp units, each comprising: a housing which is a circular disc having a bottom wall and a surrounding wall made of transparent material; a ring-shaped lamp mount, which is supported on a central portion of said bottom wall of said housing, having a circular outer light reflective surface and defining a receiving chamber therein and a light source chamber between said light reflective surface and said surrounding wall of said housing; a light source which is disposed inside said light source chamber of said housing and supported around said reflective surface of said lamp mount; a control circuit, which is disposed in said receiving chamber, comprising a power connector detachably connected to said light source, a power input terminal for supplying electricity to said light source via said power connector, and a power output terminal for extended electrical connection; a bottom attachment fastener provided at a bottom portion of said housing; and a top attachment fastener provided at a top portion of said housing; wherein said top attachment fastener of a lower layer of said lamp units is detachably fastened with said bottom attachment fastener of an upper layer of said lamp units while said power output terminal of said lower layer of said lamp units is connected with said power input terminal of said upper layer of said lamp units, so as to stack up said lamp units in a layer on layer manner to form a stack-up lamp body; a base having a top mounting surface and a bottom supporting surface; means for mounting said stack-up lamp body on said base; means for supporting said base being detachably attached to said bottom supporting surface of said base; and an elongaged electric cord having one end connected with an electric plug and another end provided with a terminal connector to electrically connect with said power input terminal of said lamp unit that is attached to said base.
- 2. The stack lamp, as recited in claim 1, wherein said light source includes a ring type fluorescent bulb having a diameter smaller than said housing and larger than said lamp mount and a height smaller than said surrounding wall of said housing.
- 3. The stack lamp, as recited in claim 2, wherein each of said lamp unit further comprises means for mounting said fluorescent bulb around said lamp mount inside said light source chamber of said housing.
- 4. The stack lamp, as recited in claim 3, wherein said lamp mount is a ring-shaped body which bottom end inwardly protruded a plurality of fastening lips for fastening on said central portion of said bottom wall of said housing so as to integrally and coaxially fasten said lamp mount on said bottom wall.
- 5. The stack lamp, as recited in claim 3, wherein each of said lamp units further comprises a mounting device for supporting said fluorescent bulb around said lamp mount inside said light source chamber of said housing, wherein said mounting device includes a plurality of U-shaped holder mounts each having one end connected to said lamp mount, wherein said fluorescent bulb is supported by sitting on said holder mounts spacedly so as to evenly support a weight of said fluorescent bulb within said light source chamber.
- 6. The stack lamp, as recited in claim 1, wherein said bottom attachment fastener of each of said lamp units includes a plurality of arc-shaped attachment ribs, which are integrally and downwardly protruded from said bottom wall of said housing and spacedly aligned along a peripheral edge of said bottom wall, and a plurality of engagement knobs protruded from outer surfaces of said attachment ribs respectively that defines an engagement gap between each of said engagement knobs and a bottom edge of said surrounding wall, wherein said top attachment fastener of each of said lamp units has a plurality of engagement slots formed on a top edge of said surrounding wall of said housing, wherein to connect said bottom attachment fastener of one of said lamp unit with said top attachment fastener of another of said lamp units, said engagement knobs are engaged with said engagement slots respectively.
- 7. The stack lamp, as recited claim 6, wherein each of said engagement slots has a first portion downwardly extended from said top edge of said surrounding wall and a second portion transversally extended from said first portion that defines an edge tongue between said top edge of said surrounding wall and said second portion of each of said engagement slots, wherein said attachment ribs are inserted in said light source chamber until said top edge of said surrounding wall of said lower lamp unit supports against said bottom wall of said upper lamp unit and said engagement knobs are positioned at bottom ends of said first portions of said engagement slots respectively, thereafter said engagement knobs are driven transversally into said second portions of said engagement slots so that said edge tongues of said top attachment fastener are engaged between said engagement knobs and said bottom wall of said upper lamp unit.
- 8. The stack lamp, as recited in claim 6, wherein a threaded hole is formed adjacent to said engagement gap on each of said attachment ribs and a plurality of fastening screws each having an enlarged head is screwed into said threaded holes until said enlarged heads are pressed against said surrounding wall of said respective lamp unit.
- 9. The stack lamp, as recited in claim 7, wherein a threaded hole is formed adjacent to said engagement gap on each of said attachment ribs and a plurality of fastening screws each having an enlarged head is screwed into said threaded holes until said enlarged heads are pressed against said surrounding wall of said respective lamp unit.
- 10. The stack lamp, as recited in claim 6, wherein said means for mounting said stack-up lamp body on said base includes a base attachment fastener which has a plurality of arc-shape base attachment slots circularly and spacedly aligned on said base for said attachment ribs to insert therethrough.
- 11. The stack lamp, as recited in claim 10, wherein said means for mounting said stack-up lamp body further has a plurality of indentions formed at outer elongated sides of said base attachment slots respectively, wherein in order to mount said stack a lamp unit on said base to function as a bottom layer of said lamp units, said arc-shaped attachment ribs of said respective lamp unit are inserted through said base attachment slots respectively while aligning said engagement knobs with said indentions, wherein a length of each of said attachment slots is longer than that of said attachment rib, wherein after said engagement knobs pass through said base attachment slots, said respective lamp unit is rotated until said engagement knobs are disaligned with said indentions so as to engage said base between said bottom wall of said respective lamp unit and said attachment knobs.
- 12. The stack lamp, as recited in claim 7, wherein said means for mounting said stack-up lamp body on said base includes a base attachment fastener which has a plurality of arc-shape base attachment slots circularly and spacedly aligned on said base for said attachment ribs to insert therethrough.
- 13. The stack lamp, as recited in claim 12, wherein said means for mounting said stack-up lamp body further has a plurality of indentions formed at outer elongated sides of said base attachment slots respectively, wherein in order to mount said stack a lamp unit on said base to function as a bottom layer of said lamp units, said arc-shaped attachment ribs of said respective lamp unit are inserted through said base attachment slots respectively while aligning said engagement knobs with said indentions, wherein a length of each of said attachment slots is longer than that of said attachment rib, wherein after said engagement knobs pass through said base attachment slots, said respective lamp unit is rotated until said engagement knobs are disaligned with said indentions so as to engage said base between said bottom wall of said respective lamp unit and said attachment knobs.
- 14. The stack lamp, as recited in claim 8, wherein said means for mounting said stack-up lamp body on said base includes a base attachment fastener which has a plurality of arc-shape base attachment slots circularly and spacedly aligned on said base for said attachment ribs to insert therethrough.
- 15. The stack lamp, as recited in claim 14, wherein said means for mounting said stack-up lamp body further has a plurality of indentions formed at outer elongated sides of said base attachment slots respectively, wherein in order to mount said stack a lamp unit on said base to function as a bottom layer of said lamp units, said arc-shaped attachment ribs of said respective lamp unit are inserted through said base attachment slots respectively while aligning said engagement knobs with said indentions, wherein a length of each of said attachment slots is longer than that of said attachment rib, wherein after said engagement knobs pass through said base attachment slots, said respective lamp unit is rotated until said engagement knobs are disaligned with said indentions so as to engage said base between said bottom wall of said respective lamp unit and said attachment knobs.
- 16. The stack lamp, as recited in claim 9, wherein said means for mounting said stack-up lamp body on said base includes a base attachment fastener which has a plurality of arc-shape base attachment slots circularly and spacedly aligned on said base for said attachment ribs to insert therethrough.
- 17. The stack lamp, as recited in claim 16, wherein said means for mounting said stack-up lamp body further has a plurality of indentions formed at outer elongated sides of said base attachment slots respectively, wherein in order to mount said stack a lamp unit on said base to function as a bottom layer of said lamp units, said arc-shaped attachment ribs of said respective lamp unit are inserted through said base attachment slots respectively while aligning said engagement knobs with said indentions, wherein a length of each of said attachment slots is longer than that of said attachment rib, wherein after said engagement knobs pass through said base attachment slots, said respective lamp unit is rotated until said engagement knobs are disaligned with said indentions so as to engage said base between said bottom wall of said respective lamp unit and said attachment knobs.
- 18. The stack lamp, as recited in claim 3, wherein said bottom attachment fastener of each of said lamp units includes a plurality of arc-shaped attachment ribs, which are integrally and downwardly protruded from said bottom wall of said housing and spacedly aligned along a peripheral edge of said bottom wall, and a plurality of engagement knobs protruded from outer surfaces of said attachment ribs respectively that defines an engagement gap between each of said engagement knobs and a bottom edge of said surrounding wall, wherein said top attachment fastener of each of said lamp units has a plurality of engagement slots formed on a top edge of said surrounding wall of said housing, wherein to connect said bottom attachment fastener of one of said lamp unit with said top attachment fastener of another of said lamp units, said engagement knobs are engaged with said engagement slots respectively.
- 19. The stack lamp, as recited claim 18, wherein each of said engagement slots has a first portion downwardly extended from said top edge of said surrounding wall and a second portion transversally extended from said first portion that defines an edge tongue between said top edge of said surrounding wall and said second portion of each of said engagement slots, wherein said attachment ribs are inserted in said light source chamber until said top edge of said surrounding wall of said lower lamp unit supports against said bottom wall of said upper lamp unit and said engagement knobs are positioned at bottom ends of said first portions of said engagement slots respectively, thereafter said engagement knobs are driven transversally into said second portions of said engagement slots so that said edge tongues of said top attachment fastener are engaged between said engagement knobs and said bottom wall of said upper lamp unit.
- 20. The stack lamp, as recited in claim 19, wherein a threaded hole is formed adjacent to said engagement gap on each of said attachment ribs and a plurality of fastening screws each having an enlarged head is screwed into said threaded holes until said enlarged heads are pressed against said surrounding wall of said respective lamp unit.
- 21. The stack lamp, as recited in claim 19, wherein said means for mounting said stack-up lamp body on said base includes a base attachment fastener which has a plurality of arc-shape base attachment slots circularly and spacedly aligned on said base for said attachment ribs to insert therethrough.
- 22. The stack lamp, as recited in claim 21, wherein said means for mounting said stack-up lamp body further has a plurality of indentions formed at outer elongated sides of said base attachment slots respectively, wherein in order to mount said stack a lamp unit on said base to function as a bottom layer of said lamp units, said arc-shaped attachment ribs of said respective lamp unit are inserted through said base attachment slots respectively while aligning said engagement knobs with said indentions, wherein a length of each of said attachment slots is longer than that of said attachment rib, wherein after said engagement knobs pass through said base attachment slots, said respective lamp unit is rotated until said engagement knobs are disaligned with said indentions so as to engage said base between said bottom wall of said respective lamp unit and said attachment knobs.
- 23. The stack lamp, as recited in claim 20, wherein said means for mounting said stack-up lamp body on said base includes a base attachment fastener which has a plurality of arc-shape base attachment slots circularly and spacedly aligned on said base for said attachment ribs to insert therethrough.
- 24. The stack lamp, as recited in claim 23, wherein said means for mounting said stack-up lamp body further has a plurality of indentions formed at outer elongated sides of said base attachment slots respectively, wherein in order to mount said stack a lamp unit on said base to function as a bottom layer of said lamp units, said arc-shaped attachment ribs of said respective lamp unit are inserted through said base attachment slots respectively while aligning said engagement knobs with said indentions, wherein a length of each of said attachment slots is longer than that of said attachment rib, wherein after said engagement knobs pass through said base attachment slots, said respective lamp unit is rotated until said engagement knobs are disaligned with said indentions so as to engage said base between said bottom wall of said respective lamp unit and said attachment knobs.
- 25. The stack lamp, as recited in claim 1, further comprising a cover to cover a top opening of said stack-up lamp body.
- 26. The stack lamp, as recited in claim 25, wherein a handle is affixed to said cover.
- 27. The stack lamp, as recited in claim 26, wherein said handle is pivotally affixed on said cover and a handle recess is formed on said cover to receive said handle when it is folded down.
- 28. The stack lamp, as recited in claim 26, wherein said cover comprises a cover attachment fastener which includes a plurality of arc-shaped cover attachment ribs for engaging with said top attachment fastener of said lamp unit that is positioned at a top layer of said stack-up lamp body, wherein cover attachment ribs are integrally and downwardly protruded from said cover and spacedly aligned along a peripheral edge of said cover, and a plurality of cover engagement knobs protruded from outer surfaces of said cover attachment ribs respectively that defines an cover engagement gap between each of said cover engagement knobs and said cover.
- 29. The stack lamp, as recited in claim 3, further comprising a cover to cover a top opening of said stack-up lamp body.
- 30. The stack lamp, as recited in claim 29, wherein a handle is affixed to said cover.
- 31. The stack lamp, as recited in claim 7, further comprising a cover to cover a top opening of said stack-up lamp body, wherein said cover comprises a cover attachment fastener which includes a plurality of arc-shaped cover attachment ribs for engaging with said top attachment fastener of said lamp unit that is positioned at a top layer of said stack-up lamp body, wherein cover attachment ribs are integrally and downwardly protruded from said cover and spacedly aligned along a peripheral edge of said cover, and a plurality of cover engagement knobs protruded from outer surfaces of said cover attachment ribs respectively that defines an cover engagement gap between each of said cover engagement knobs and said cover.
- 32. The stack lamp, as recited in claim 31, wherein a handle is affixed to said cover.
- 33. The stack lamp, as recited in claim 9, further comprising a cover to cover a top opening of said stack-up lamp body, wherein said cover comprises a cover attachment fastener which includes a plurality of arc-shaped cover attachment ribs for engaging with said top attachment fastener of said lamp unit that is positioned at a top layer of said stack-up lamp body, wherein cover attachment ribs are integrally and downwardly protruded from said cover and spacedly aligned along a peripheral edge of said cover, and a plurality of cover engagement knobs protruded from outer surfaces of said cover attachment ribs respectively that defines an cover engagement gap between each of said cover engagement knobs and said cover.
- 34. The stack lamp, as recited in claim 33, wherein a handle is affixed to said cover.
- 35. The stack lamp, as recited in claim 11, further comprising a cover to cover a top opening of said stack-up lamp body, wherein said cover comprises a cover attachment fastener which includes a plurality of arc-shaped cover attachment ribs for engaging with said top attachment fastener of said lamp unit that is positioned at a top layer of said stack-up lamp body, wherein cover attachment ribs are integrally and downwardly protruded from said cover and spacedly aligned along a peripheral edge of said cover, and a plurality of cover engagement knobs protruded from outer surfaces of said cover attachment ribs respectively that defines an cover engagement gap between each of said cover engagement knobs and said cover.
- 36. The stack lamp, as recited in claim 35, wherein a handle is affixed to said cover.
- 37. The stack lamp, as recited in claim 17, further comprising a cover to cover a top opening of said stack-up lamp body, wherein said cover comprises a cover attachment fastener which includes a plurality of arc-shaped cover attachment ribs for engaging with said top attachment fastener of said lamp unit that is positioned at a top layer of said stack-up lamp body, wherein cover attachment ribs are integrally and downwardly protruded from said cover and spacedly aligned along a peripheral edge of said cover, and a plurality of cover engagement knobs protruded from outer surfaces of said cover attachment ribs respectively that defines an cover engagement gap between each of said cover engagement knobs and said cover.
- 38. The stack lamp, as recited in claim 37, wherein a handle is affixed to said cover.
- 39. The stack lamp, as recited in claim 24, further comprising a cover to cover a top opening of said stack-up lamp body, wherein said cover comprises a cover attachment fastener which includes a plurality of arc-shaped cover attachment ribs for engaging with said top attachment fastener of said lamp unit that is positioned at a top layer of said stack-up lamp body, wherein cover attachment ribs are integrally and downwardly protruded from said cover and spacedly aligned along a peripheral edge of said cover, and a plurality of cover engagement knobs protruded from outer surfaces of said cover attachment ribs respectively that defines an cover engagement gap between each of said cover engagement knobs and said cover.
- 40. The stack lamp, as recited in claim 39, wherein a handle is affixed to said cover.
- 41. The stack lamp, as recited in claim 1, wherein said supporting means includes a plurality of rolling wheels affixed to said bottom supporting surface of said base.
- 42. The stack lamp, as recited in claim 1, wherein said supporting means includes an extensible tripod affixed to said bottom supporting surface of said base.
- 43. The stack lamp, as recited in claim 3, wherein said supporting means includes a plurality of rolling wheels affixed to said bottom supporting surface of said base.
- 44. The stack lamp, as recited in claim 3, wherein said supporting means includes an extensible tripod affixed to said bottom supporting surface of said base.
- 45. The stack lamp, as recited in claim 7, wherein said supporting means includes a plurality of rolling wheels affixed to said bottom supporting surface of said base.
- 46. The stack lamp, as recited in claim 7, wherein said supporting means includes an extensible tripod affixed to said bottom supporting surface of said base.
- 47. The stack lamp, as recited in claim 17, wherein said supporting means includes a plurality of rolling wheels affixed to said bottom supporting surface of said base.
- 48. The stack lamp, as recited in claim 17, wherein said supporting means includes an extensible tripod affixed to said bottom supporting surface of said base.
- 49. The stack lamp, as recited in claim 38, wherein said supporting means includes a plurality of rolling wheels affixed to said bottom supporting surface of said base.
- 50. The stack lamp, as recited in claim 38, wherein said supporting means includes an extensible tripod affixed to said bottom supporting surface of said base.
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Number |
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A |
4161020 |
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Jul 1979 |
A |
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Siminovitch et al. |
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