This disclosure relates to seasonal and decorative lighting. More specifically, the disclosure relates to decorative-lighting strings and decorative-lighting bulbs having multiple light-emitting
Incandescent bulbs used in decorative lighting, and in particular, large-globe or large-reflector light bulbs, such as candelabra or “C” bulbs with screw-type lamp bases, provide significant light output as compared to smaller incandescent bulbs, such as “mini” bulbs. However, traditional, large-reflector incandescent bulbs tend to generate significant heat and draw high power. Consequently, the decorative-lighting industry turned to large-reflector bulbs with light-emitting diodes (LEDs) having good light output and at a significant energy-use reduction. However, known large-reflector bulbs remain relatively inconvenient to use in lighting strings with many bulbs, and at a relatively high cost, and may not be water resistant.
Embodiments of the present disclosure overcome the shortcomings of known large-reflector bulbs by providing convenient-to-use, cost-effective large-reflector LED bulbs that may be water resistant, for decorative lighting strings.
In an embodiment, a water-resistant, push-in type decorative-lighting assembly, includes: a reflector defining a reflector cavity; an LED assembly including a plurality of light-emitting diodes (LEDs); a pair of conductive connectors electrically connected to the LED assembly, including a first conductive connector electrically connected to a first end of the LED assembly and a second conductive connector electrically connected to a second end of the LED assembly; a base portion including a body portion, a projection portion projecting from a bottom end of the body portion, and an LED support portion, the body portion defining a cavity receiving a lower portion of the reflector, and the body portion defining a first channel and a second channel, the first channel receiving a portion of the first conductive connector and the second channel receiving a portion of the second conductive connector, an end of the first conductive connector extending out of the first channel and an end of the second conductive connector extending out of the second channel; and a lamp socket defining an upper cavity receiving the body portion of the base portion and a lower cavity receiving the projection portion of the base portion and the ends of the first and second conductive connectors.
In another embodiment, a decorative-lighting string comprises: a power plug configured to electrically connect to a power source; a plurality of decorative-lighting assemblies, each decorative-lighting assembly of the plurality of decorative-lighting assemblies including a reflector defining a reflector cavity, an LED assembly including a plurality of light-emitting diodes (LEDs), a pair of conductive connectors electrically connected to the LED assembly, including a first conductive connector electrically connected to a first end of the LED assembly and a second conductive connector electrically connected to a second end of the LED assembly, a base portion including a body portion, a projection portion projecting from a bottom end of the body portion, and an LED support portion, the body portion receiving a lower portion of the reflector, a portion of the first conductive connector and a portion of the second conductive connector, an end of the first conductive connector extending out of base portion and an end of the second conductive connector extending out of the base portion and a lamp socket receiving the body portion of the base portion and the ends of the first and second conductive connectors; and a plurality of wires in electrical connection with the plurality of decorative-lighting assemblies.
The invention can be understood in consideration of the following detailed description of various embodiments of the invention in connection with the accompanying drawings, in which:
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Referring to
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In an embodiment, LED lamp assembly 180 may include a first group of LEDs 230 electrically connected in series and a second group of LEDs 230 electrically connected in series, with the two groups electrically connected in parallel, and wherein the two groups are oppositely polarized, i.e., the diode groups are connected “back-to-back” such that for current flow in a first direction, a first group of diodes illuminates, while a second group does not, and for current flow in a second direction, the first group of diodes does not illuminate, while the second group does illuminate. Such a configuration may be used when alternating current (AC) power is applied to LED assembly 180, such that the LED groups alternate illuminating based on alternating positive and negative voltages delivered by the AC power source.
In an embodiment, and as depicted, LED assembly 180 may be generally long and narrow, and may be positioned such that LED assembly 180 is extending vertically within reflector 130.
In an embodiment, each push-in, large-reflector LED bulb assembly 100 is configured to operate with 120 VAC, and all bulb assemblies 100 may be electrically connected in parallel in decorative lighting string 110. In another embodiment, each large-reflector LED bulb assembly 100 is configured to operate with 24 VAC, and all push-in type large-reflector LED bulb assemblies 100 may be electrically connected in series in a decorative lighting string 110. In one such embodiment, decorative lighting string 110 may include five push-in type large-reflector LED bulb assemblies, such that a decorative lighting string may be connected to a 120 VAC power source via power plug 109. In one such embodiments, each LED lamp assembly 180 may include eight 3-volt LEDs 230 electrically connected in series.
Most known large-reflector lighting strings include screw-base candelabra bulbs, e.g., C9 lighting strings, that require a user to screw in each bulb into a socket. As will become evident with the description below, embodiments of the present disclosure provide “push-in” type large-reflector LED bulb assemblies 100 which are easier to install and replace and are cost effective.
Although decorative-lighting string 110 is depicted as having four assemblies 100, it will be understood that decorative-lighting string 110 may include more or fewer than four assemblies. Further in a series-parallel decorative-lighting string 110, more than two groups may be included. The number of large-reflector LED bulb assemblies 100 and the number of groups may depend on various factors, including available power source voltage, including whether a power converter or adapter is used. In an embodiment, decorative-lighting string 110 may include a power adapter, not depicted, to convert available source power to a lower voltage power, in addition to a plurality of large-reflector LED bulb assemblies 100, lamp sockets 102, insulated conductors (wires) 104 and power plug 109.
Referring to
In an embodiment, large-reflector LED bulb assembly 100 includes globe or reflector 130 with interior reflector cavity 133 (having lower cavity 133a and upper cavity 133b), sealing portion 122, LED lighting assembly 124, lamp socket or lamp holder 102 and a pair of wires 104, each with a conductive terminal 126.
Referring also to
In embodiments, reflectors 130 may form known shapes, such as a candelabra (100b), “fat” or enlarged candelabra (100a), teardrop candelabra (100b) or oversized or “giant” mini bulb (100c), though other shape may be possible. Reflector 130 sizes may vary, and in an embodiment are “C” shaped reflectors of known, standard sizes, such as “C3” with maximum width WB1 being approximately 0.5″ and height H being approximately 0.8″; “C6” with maximum width WB1 being approximately 0.5″ and height H being approximately 0.8″; “C7” WB1 being approximately 1.0″ and H being 1.5″; or “C9” size WB1 being approximately 1.25″ and H being 2.5″; which are standard sizes used in seasonal and decorative lighting, and as will be understood by those of ordinary skill in the art of seasonal and decorative lighting, including Christmas lighting.
In an embodiment, maximum width WB1 is in a range of 0.5″ to 1.25″ and height His in a range of 0.8″ to 2.5″.
In other embodiments, reflector 130 may comprise shapes other than C shapes, such as round or spherical “G” or “globe” shapes, such as G12, G15, G20, G25 and so on. As understood by those of ordinary skill, a diameter of a G bulb is determined by dividing the number after the “G” by 8, then rounding to the closest inch. For example, a G25 bulb has a diameter that is approximately 3.1″ or more roughly, 3″ in diameter.
Known C-bulb and globe-bulb assemblies, particularly for incandescent bulbs, and sometimes for LED bulbs, will be constructed of glass. However, glass is fragile and subject to breaking. Consequently, although in some embodiments, reflectors 130 may comprise glass, an alternate material includes clear polymer materials. In one such embodiment, reflector 130 comprises a polycarbonate material.
In an embodiment, reflector 130 includes top portion 132, bottom portion 134 with rim 136 and defines cavity 138 with opening 140. In an embodiment, rim 136 forms a circular shape, though other shapes are contemplated. Reflector 130 may also include projection or key 139 at bottom portion 134. As described further below, projection 139 may be aligned with a complementary recess or slot in
Sealing portion 122, also referred to as a waterproof ring, in an embodiment, comprises base portion 150 with body portion 152. Base portion 150 forms an annular ring or flange, which may be circular in shape, and includes top surface 154 and bottom surface 156, opposite top surface 154. Body portion 152, in an embodiment, forms a cylindrical shape which projects upwardly and away from base portion 150. Body portion 152 includes outer surface 160 and defines channel 162.
In an embodiment, base portion 150 comprises a polymer material, such as polyvinyl chloride (PVC) or polyethylene (PE).
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In an embodiment, base portion 170 includes body portion 181 with bottom end 177, LED support portion 182, projection or divider portion 184, inside annular surface 186 and outside surface 188. Base portion 170 may also define one or more slots 171 configured to engage portions of rim 136 of reflector 130
Body portion 181, in an embodiment, forms a circular shape and defines cavity 190, which is configured to receive a portion of sealing portion 122, including base portion 156, as well as a lower portion of reflector 130. LED support portion 182 projects upwardly and away from a center of body portion 181 and defines a pair of channels 222 configured to receive first conductive support post 176 and second conductive support post 178, respectively, as well as resistors 220, when present. LED support portion 182 may include a base portion and a narrower projection portion that defines the pair of channels. Body portion 181 forms annular surface 186, which fully or partially encircles LED support portion 182, and is configured to fit adjacent to bottom surface 156 of base portion 150. Cavity 190, in an embodiment, is ring or toroidal shaped and is configured to receive base portion 150.
Projection portion 184 projects downward and away from body portion 181. In an embodiment, projection portion 184 includes base portion 200 connected to projection portion 202. In an embodiment, base portion 200 is integrally formed with projection portion 202. Base portion 200 may have a width W1 that is greater than a width W2 of projection portion 202. In an embodiment, a depth of base portion 200 may be substantially equal to a depth of projection portion 202. In an embodiment, base portion 200 and/or projection portion 202 may function as a key, fitting into a keyway of lamp socket 102 to limit connecting orientations. In an embodiment, base portion 200 may define a pair of opposing channels 222, one on a left side, another on a right side, separated by wall 173, configured to receive bent portions of LED support posts, resistor 220 leads 221, or other conductive structures in electrical connection with LED assembly 180. Conductive terminating ends 201 and 203 extend through lower openings in channels 222 in base 200, the openings being in communication with the base channels 222 and extend outside of base 200 for electrical connection to wire terminals 126. Conductive terminating ends 201 and 203 may be resistor 220 leads (when a resistor 220 is present), or may be ends of conductive support posts 176 and 178 projecting out of base 200 and bent upwards. In an embodiment, the lower ends of channels 222 and portions of terminating ends 201 and 203 may be filled with, or coated with a sealing material, such as epoxy, conformal coating, glue and so on.
Projection portion 184 in this embodiment may also include key or ridge 352 extending along an exterior portion of projection portion 184. In the embodiment depicted, ridge portion 352 extends vertically from a top end of projection portion 184 to a bottom end of projection portion 184 and may also extend horizontally along a bottom surface of projection portion 184. In an embodiment, ridge 352 is an extension of wall 173 that projects or resides outside of base 170. Ridge 352 may be configured to fit into a corresponding slot in lamp holder 102.
First LED conductive support post 176 projects upwardly and away from LED support portion 182, with a first end received into a channel 222. In an embodiment, a second end 224 of LED conductive support post 176 forms an angle, which may be a 90° angle, such that second end 224 includes a portion that is transverse to other portions, including the first portion of support post 176.
Second LED conductive support post 178 projects upwardly and away from LED support portion 182, with a first end 225 received into a channel 222, and a second end 226 connected to LED assembly 180.
First and second LED conductive support posts 176, 178 are electrically and mechanically connected to LED assembly 180, thereby mechanically supporting a position of LED assembly 180 and providing a source of electricity when large-reflector LED bulb assembly 106 is powered via insulated conductors 104. In an embodiment, second ends 224 and 226 may be respectively soldered to ends of LED 180.
First and second LED conductive support posts 176, 178 may be secured in channels 222 using an epoxy or similar material or glue, which secures and seals, such as a conformal coating.
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In an embodiment, LED assembly 180 may also include a bridge rectifier circuit or diode bridge to rectify and condition incoming AC current into a pulsating or DC current.
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In an embodiment, LEDs 230 may be mechanically attached to a base portion and covered with a sealing and illumination enhancement material, such as a phosphor material.
Resistor 220 when present, may be electrically connected in series to LED assembly 180, and to LEDs 230, via connection to first and second LED conductive support posts 176, 178. In an embodiment, and as depicted, first/upper conductive leads of resistors 220 are connected to first and second LED conductive support posts 176, 178. Second/lower conductive leads 201, 203 of resistor 220 extend outside of body portion 181 and are exposed to be connectable to electrical terminals 126.
Electrical terminals 126 are clamped onto conductive portions of insulated conductors 104 and are configured to connect to first and second LED conductive support members 176 and 178, which may be via resistor 220.
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In an embodiment rim 136 of lower portion 134 of reflector 130 may have a contoured outer surface 137 that forms projecting rings 139 and 143, and defines channel 141. In an embodiment, when rim 136 is fit into lamp socket 102, contoured outer surface 137 abuts inside annular surface 186 of base portion 170, thereby forming another sealing region between reflector 130 and base portion 170. Portions of contoured outer surface 137, such as rings 139 or 143 may be configured to be received into slots 171 of body portion 170, thereby securing reflector 130 to base 170.
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Lamp socket 302, in an embodiment, includes socket portion 310 and cap portion 312, and one or more wire-piercing electrical terminals 314, including a first wire-piercing electrical terminal 314a and a second wire-piercing electrical terminal 314b.
Socket portion 310, in an embodiment, includes body portion 320 having a generally cylindrical wall and defining a socket cavity 322. Body portion 320, in an embodiment, defines one or more cut-outs or recesses 324 configured to receive portions of wire set 304. Socket portion 310 may comprise a generally non-conductive material, such as a polymer, which may be PVC.
In an embodiment, socket cap 312 includes covering portion 330, connecting projections 332, including first connecting projection 332a and second connecting projection 332b, and hook 334.
Covering portion 312, in an embodiment, is configured to form a bottom cap or cover to cover an opening of cavity 322 of body portion 320. In an embodiment, covering portion 312 may be generally flat, though may include channels for receiving portions of wires 104 of wire set 304.
Connecting projections 332 project upward and away from an inner surface of covering portion 312 and may include a hook or projection on a distal end to engage with, and/or be received by, structure of body portion 320, so as to connect covering portion 312 to body portion 320, containing and stabilizing wire set 304 therebetween.
Insulation-piercing electrical terminals 314 are coupled to body portion 320, are conductive, and include insulation-piercing portions 340 configured to pierce insulation 107 of wires 104, thereby making electrical connection with conductors 105 of wires 104. Embodiments of wire-piercing electrical terminals and lamp sockets for connection to parallel wires are described in U.S. Pat. No. 8,853,721, issued Oct. 7, 2014, and entitled Wire-Piercing LED Lead Frame, which is incorporated herein by reference in its entirety.
During assembly of lamp socket 302 to wire set 304, body portion 320 with secured terminals 314 is place atop wires 104, cap portion 312 is placed below wires 104, and force is applied to cap portion 312 and/or body portion 320 causing them to move toward each other and causing insulation-piercing portions 340 to pierce insulation 107, such that lamp socket 302 and cap portion 312 are mechanically joined and insulation-piercing electrical terminals 314 are in electrical connection with one or more conductors 105 of wire set 304. Large-reflector LED bulb assembly 100 is pushed into lamp socket 302, such that base portion 170 is received into socket cavity 322, and LED lamp assembly 180 is in electrical connection with terminals 314.
Referring specifically to
In this embodiment, projection portion 184 includes a pair of lamp conductor recesses 350 at an end of projection portion 184 configured to receive portions of bent resistor 220 bent leads 221. More generally, recesses 350 may be configured to receive resistor leads, support posts, or other conductive portions of LED assembly 100 intended to connect to wire set 304. Projection portion 184 in this embodiment may also include key or ridge 352 extending along an exterior portion of projection portion 184. In the embodiment depicted, ridge portion 352 extends vertically from a top end of projection portion 184 to a bottom end of projection portion 184 and may also extend horizontally along a bottom surface of projection portion 184.
Lamp socket 310 includes keyway portion 354 defining keyway 356. Keyway portion 354, in an embodiment, and as depicted, forms a walled structure configured to receive projection portion 184 in only one orientation. In particular, ridge or key portion 352 is configured to be received in channel 360 of keyway portion 354.
In an embodiment, lamp socket 310 may also include step or shoulder 361 configured to abut bottom portion 177 of base 170. In an embodiment, step 361 extends circumferentially about an inner surface 363 of lamp socket 310. Step 361 may also be present in lamp socket 302 of the prior embodiment.
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The various connection configurations of
The embodiments above are intended to be illustrative and not limiting. Additional embodiments are within the claims. In addition, although aspects of the present invention have been described with reference to particular embodiments, those skilled in the art will recognize that changes can be made in form and detail without departing from the spirit and scope of the invention, as defined by the claims.
Persons of ordinary skill in the relevant arts will recognize that the invention may comprise fewer features than illustrated in any individual embodiment described above. The embodiments described herein are not meant to be an exhaustive presentation of the ways in which the various features of the invention may be combined. Accordingly, the embodiments are not mutually exclusive combinations of features; rather, the invention may comprise a combination of different individual features selected from different individual embodiments, as understood by persons of ordinary skill in the art.
Any incorporation by reference of documents above is limited such that no subject matter is incorporated that is contrary to the explicit disclosure herein. Any incorporation by reference of documents above is further limited such that no claims included in the documents are incorporated by reference herein. Any incorporation by reference of documents above is yet further limited such that any definitions provided in the documents are not incorporated by reference herein unless expressly included herein.
For purposes of interpreting the claims for the present invention, it is expressly intended that the provisions of Section 112, sixth paragraph of 35 U.S.C. are not to be invoked unless the specific terms “means for” or “step for” are recited in a claim.
This application claims the benefit of U.S. Provisional Patent Application No. 63/584,019, filed Sep. 20, 2023, which is incorporated herein in its entirety.
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Number | Date | Country | |
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63584019 | Sep 2023 | US |