The invention relates to a combination device including a guide light and an additional electrical component. The combination device can be disposed in a housing which can be mounted in a wall mounted electrical enclosure. Previously, because of limited space in the housing, the addition of a light would result in a reduced availability or functionality of the electrical component such as requiring that the light be placed in place of an electrical component such as a receptacle unit in the housing. This type device can use LEDs or Light Emitting Diodes which can be housed inside of the housing. LEDs can be surface mounted on a board and then be used to provide sufficient ambient light for a nightlight.
Some patents which relate to LED lighting include U.S. Pat. No. 7,165,864 to Miller which issued on Jan. 23, 2007 and U.S. Pat. No. 7,234,844 to Bolta et al which issued on Jun. 26, 2007, wherein the disclosures of these patents are hereby incorporated herein by reference. It is noted from the '864 patent to Miller that the Uniform Code for Buildings requires buildings and parking garages to have lights in corridors and stairwells to have an illuminance of at least one foot candle.
At least one embodiment relates to a combination electrical device comprising at least one light and at least one sensor along with an electrical component disposed in housing. In this embodiment, the arrangement of the light, the sensor and the housing are such that it does not restrict the availability of the electrical component which in at least one embodiment can be a duplex set of electrical components such as a duplex receptacle unit. In many cases, a duplex set of electrical components or a duplex user interface are positioned in a stacked manner with one electrical component such as a receptacle unit being positioned above another electrical component such as a receptacle unit. Any other electrical components can also be used in place of the receptacle units, such as switches.
Duplex receptacle units are designed to receive at least two plugs. In at least one embodiment, the electrical component can also comprise a GFCI receptacle also capable of receiving at least two plugs. In another alternative embodiment, the electrical component can be in the form of a light switch alone or a switch in combination with a receptacle unit.
In one embodiment, the housing is designed to receive a light, a light sensor and a circuit board so that it does not restrict access to an electrical component or reduce the number of electrical components disposed inside of the housing. For example, this housing can include at least one additional housing for receiving the light and sensor or the light and the sensor coupled to a circuit board. In one embodiment, the light is a LED light that serves as a guide light. In alternative embodiments, multiple lights can be disposed in the housing as well. The sensor is in communication with the light and determines the presence or absence of light. The sensor can selectively turn the light on or off depending on the presence or absence of a predetermined amount of ambient light.
In addition, in one embodiment, there is a translucent cover for covering the light and the sensor. In at least one embodiment, the translucent cover extends along at least one fourth of a length of a front face of the housing. In another embodiment, the translucent cover extends along at least one third of a length of a front face of the housing. In still another embodiment, the translucent cover extends along one half of a length of the front face of the housing. Because of the unique re-design of the housing and the receptacle terminals, the light can be placed along side the duplex receptacle openings rather than in place of a full receptacle unit.
In at least one embodiment, there can be at least one light pipe having a first end and a second end. The first end is coupled to the translucent cover, and the second end is coupled to a LED light on the second circuit board. In one embodiment, this second circuit board can includes an array of lights such as LED lights extending underneath the translucent cover.
In at least one embodiment, there are multiple translucent covers coupled to the housing. Each cover can be used to cover a single elongated light or multiple lights disposed beneath the cover.
In at least one embodiment, the sensor comprises a photoresistor which is in communication with a transistor to form a selective switch, to selectively turn on or off LED lights based upon an amount of light received by the photoresistor.
In at least one other embodiment, the sensor comprises a photo transistor which is in communication with a transistor to form a selective switch, to selectively turn on or off lights such as LED lights based upon the amount of light received by the photo transistor.
One of the benefits of this design is that the light can be incorporated within the enclosure without replacing or limiting any of the components normally disposed within the enclosure. For example, even after combining the light, the sensor and the electrical component in the form of a GFCI receptacle, there is still room for at least two user accessible interfaces in the housing, such as two different receptacles, with each one for receiving a plug, thus forming a GFCI duplex receptacle unit having a guide light.
Another benefit of this design is that it can be formed with modular components so that these components can be inserted into a housing disposed inside of the main housing to create an easily incorporated light in the device. With this modular design, the remaining components such as any remaining GFCI circuitry or components would not have to be significantly modified to add this light.
In at least one embodiment, the device is designed to emit at least one foot candle of illuminance.
Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It should be understood, however, that the drawings are designed for the purpose of illustration only and not as a definition of the limits of the invention.
In the drawings, wherein similar reference characters denote similar elements throughout the several views:
Referring in detail to the drawings,
Body section 14 has a strap 16 coupled to it as well as terminals 18 for connecting to a power input line or a downstream load. Front cover 12 has a user accessible interface in the form of a duplex receptacle comprising a first set of apertures 17a representing a first receptacle unit, and a second set of apertures 17b representing a second receptacle unit, thereby forming an example of a duplex user accessible interface. In this case, each set of apertures is for receiving a plug. In addition, an optional indicator light 19 is coupled to front cover 12 wherein indicator light 19 is used to indicate the status of the device.
Coupled to front cover 12 is a cover or lens unit 20 which can be transparent or translucent and be used to allow light to pass therethrough. In this case, translucent shall be defined as any material including transparent material which allows light to pass therethrough.
Cover 20 extends in an elongated manner, in a manner parallel or substantially parallel to longitudinal axis 12a of housing 11, and substantially transverse to latitudinal axis 12b of housing 11. Cover 20 has a length extending along longitudinal axis 12a and a width extending along latitudinal axis 12b. In this case, translucent cover 20 extends along a length or longitudinal axis in a manner such that it extends a sufficient length to provide sufficient illumination to an area around device 10. While the length of the cover can be any acceptable length, depending on the desired amount of light presented, in one embodiment this translucent cover 20 extends at least ¼ or 25% of a length of front face 12c. Alternatively, if more light is desired, front cover 20 is adapted such that this translucent cover 20 can extends at least ⅓ of the length of front face 12c, while if desired, in another embodiment, this translucent cover 20 extends at least ½ or 50% of the length of the front face 12c.
One of the reasons for the size of the translucent cover 20 is that it can be used to cover both a light emitter such as a LED and an optional sensor underneath this cover.
Cover or lens 20 is formed in any suitable manner and with any suitable material such that it allows light to pass therethrough. For example, this cover is formed from transparent material or translucent material which can be made from any appropriate material such as plastic or glass.
For example, this cover 20 allows light to pass through cover 20 to provide a sufficient amount of light to guide a person in a dark environment to that device as well as illuminate the surrounding area. This feature can be useful because on a periodic basis, fault circuit interrupters such as GFCI's need to be tested and reset. If a person had to reset a GFCI, it might become difficult in a dark room without additional light. In addition, this cover allows a light to pass inside of this cover such that this light is read by an optical sensor as well. In that way, an optical sensor such as sensor 34 (See
Cover 20 also has a side planar surface 26 which extends substantially perpendicular to planar face or surface 21. A clip or tab 27 is connected to this side planar face or surface 26 such that cover 20 can be first coupled to housing 11 via tabs 23 and 25 at the first end, and then secured at the second end via tab 27 which snaps into a notch 51 in housing 50.
Cover 20 can be of any particular shape. In this case, front planar surface 21 is trapezoidal in shape while side planar surface 26 is rectangular in shape. Cover 20 can be shaped trapezoidally to match its shape with housing 50. Housing 50 is shaped in this manner to accommodate face terminals 60 (See
Cover 20 is designed to cover second circuit board 32, which when this embodiment is in an assembled condition, is disposed below cover 20 and inside housing 50 and housing 11. Second circuit board 32 can include any necessary components and in this case, comprises a light sensor 34 coupled to, or in communication with a LED emitter 36. Second circuit board 32 is designed in a modular form such that it can be snapped into housing 50 and connected electrically to a power input inside housing 11. For example, circuit board 32 includes a connecting notch 35 which enables this board to be electrically connected to a face terminal 69 via an associated wire (See
Light sensor 34 is coupled to second circuit board 32 and can be used to detect either the presence or the absence of light. For example, with this embodiment, this GFCI light system can be used as a night light such that when sensor 34 detects the absence of a predetermined amount of light, it sends a signal to turn on light 36. Light can then radiate out from cover 20 from both top surface 21 and side surface 26 creating a wide reaching beam of light.
With this design, as shown in
Top cover 12d is formed so that it has a ledge 53 to allow circuit board 41 to rest on top. Circuit board 41 rests on top of ledge 53 disposed inside of housing 11a and above the GFCI circuit board disposed inside. In addition, in at least one embodiment, a sensor such as sensor 34 (See
With this design, second circuit board 32 is coupled to a plurality of face terminals 60. Face terminals 60 are designed from a metallic material and are designed to provide power to the open receptacle regions in cover 12. These face terminals 60 along with apertures 17a and 17b (see
This plurality of face terminals can include face terminals 61 and 69 which are disposed on either side of this housing and are designed to accommodate at least one second circuit board such as circuit board 32 disposed inside of the housing.
First terminal 61 is substantially identical to second terminal 69 and essentially includes the same components. For example, first terminal 61 includes contact ends 62 and 63 disposed at each end. In addition, there is a main body or busbar section 64 which has extended sections 65 and 66 disposed on either side, wherein these extended sections are designed to have a sufficient surface area to handle the normally applied power flowing through these terminals. Coupled to main body section 64 is a contact 67 which is designed to contact with switches associated with the GFCI. This design also includes a bent or raised contact section 68 which extends up substantially perpendicular from main body section 64. Raised contact section 68 forms a bent or raised contact for contacting with circuit board 32, and also provides additional surface area for power to flow across these terminals 61, and 69.
This disclosure also shows tamper resistant interfaces 72 and 74 which are substantially disposed inside the housing. In addition, a test switch 80 and a reset switch 82 are also disposed at least partially inside of this housing.
When the device is assembled, terminals 61 and 69 fit in on each side of this housing. For example, terminal 61 can fit into a main gap region 15 in housing 11. Thus, bent or raised contact 68 extends up in gap region 15. When cover 12 is placed over these contacts or terminals 61 and 69, raised contact 68 extends inside of housing 50. Next, when circuit board 32 is inserted inside of housing 50, it can be adjusted such that wire 38 inserts into connection element or notch 35 electrically connecting one end of circuit board 32 to a face terminal such as face terminal 69. In addition, clip 37 inserts onto raised contact 68 to form an electrical connection. Next, cover 20 can be snapped on to cover 12 to cover this opening in cover 12.
Alternatively, these LED components 162 can be housed on a motherboard 160 which can be formed separate from GFCI motherboard 140. Motherboard 160 is disposed in a base region of housing 50 and is electrically connected to face terminals 60 (
Light pipe 29 connects to lens element 164 such that light is sent up light pipe 29 until it reaches lens or cover 20 (See
While two LEDs 208 and 210 are shown in this diagram, a single LED such as light 36 can be positioned in this location or multiple LEDs such as four LEDs shown in
Alternatively, if the resistance in photoresistor 230 is high during a low light period, then the resulting voltage generated between base 221b and emitter 221e would be sufficient to activate transistor 220 to turn this transistor on, to allow power to flow through LEDs 208 and 210 and to turn LEDs 208 and 210 on.
This design also shows two LEDs 308 and 310, however just as with the other embodiment, while only two LEDs are shown, an embodiment having a single LED can be made from this design (See
In addition, there is a photo transistor 330 which acts such that when there is a significant amount of light, this energy is translated into electrons being injected in sufficient number into base 331b resulting in a relatively low resistance from collector 331c to emitter end 331e. This result causes a low level of voltage drop from emitter 321e to base 321b which keeps power from flowing through LEDs 308 and 310. Alternatively, when there is a low light condition or a relatively low light condition then there is relatively high resistance from collector 331c to emitter 331e in photo transistor 330. Accordingly, there is a resulting relatively high voltage drop across the emitter 321e to the base 321b causing power to flow through LEDs 308 and 310 thereby lighting LEDs 308 and 310.
Thus, with any one of the above embodiments, it is possible to place at least one LED emitter, and an additional light sensor inside of the housing in a space saving manner to determine the presence or absence of a particular amount of light and then selectively illuminating an area surrounding this housing.
In at least one of the above embodiments, the LED lights are arranged in a manner such that the device provides an illuminance of at least one foot candle.
Accordingly, while a few embodiments of the present invention have been shown and described, it is to be understood that many changes and modifications may be made thereunto without departing from the spirit and scope of the invention as defined in the appended claims.
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