US3755635A - Isolated electrical outlet assembly - Google Patents
Isolated electrical outlet assembly Download PDFInfo
- Publication number
- US3755635A US3755635A US00241999A US3755635DA US3755635A US 3755635 A US3755635 A US 3755635A US 00241999 A US00241999 A US 00241999A US 3755635D A US3755635D A US 3755635DA US 3755635 A US3755635 A US 3755635A
- Authority
- US
- United States
- Prior art keywords
- passageway
- electrical
- plug
- prong
- prongs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
- H01R13/7036—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling
- H01R13/7038—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling making use of a remote controlled switch, e.g. relais, solid state switch activated by the engagement of the coupling parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
Definitions
- ABSTRACT An electrical outlet and safety control circuit for pre- 1 venting accidental shock comprising a socket with a pair of outlet terminals isolated from a primary voltage source by normally opened relay contacts, and a switch actuatable by an elongated pin on the associated electrical plug upon insertion thereof into the socket, the switch being serially connected to the relay for closure thereof and simultaneous energization of the electrical terminals upon complete insertion of the plug.
- the present invention is generally related to electrical outlets and, more particularly, to an improved electrical outlet assembly including safety means for preventing accidental shock to a user.
- Another object of the present invention is to provide a unique electrical outlet assembly which includes a compact socket with a switch mounted therein which is effective in a control circuit to isolate the sockets electrical terminals until insertion of the plug has been completed, thereby greatly reducing the possibilities of accidental shock.
- FIG. 1 is a schematic diagram of the electrical circuitry associated with the outlet assembly of the present invention.
- FIG. 2 is a front elevation of the outlet of the present invention mounted in a typical junction box.
- FIG. 3 is a side elevation of the outlet and junction box illustrated in FIG. 2, with sections removed.
- FIG. 4 is a side elevation of the electrical outlet and junction box illustrated in FIG. 3 but with a plug fully inserted therein.
- FIG. 5 is a perspective view of the electrical plug associated with the present invention.
- the circuitry associated with the present invention is generally indicated by the numeral and includes a conventional switch mechanism 12 including normally opened contacts, not illustrated, serially connected to a control relay l4 and a secondary winding 16 associated with a control transformer 18.
- the control transformer is provided with a primary winding 20 which is connected to a primary source of voltage, such as l 10 VAC indicated at 22.
- An outlet socket 24 is provided in a conventional mounting 26 and includes a pair of electrical outlet terminals connected to the voltage source through normally opened contacts CR] and CR2, respectively, of the control relay 14.
- switch mechanism 12 is provided with an actuator 26 in the form of a pivotally mounted lever arm, a portion of which extends through an opening 29 into an elongated passageway 30 associated with the outlet socket.
- the switch mechanism is such that the actuators pivotal axis is located below and transverse of passageway 30, depression of the actuator being effective to close the normally opened contacts of the switch mechanism to effect energization of control relay 14.
- This operation causes closure of the control relay contacts CR1 and CR2, thereby connecting conductive outlet terminals 32 of the outlet socket to the primary voltage source.
- the outlet socket is comprised of an insulated housing 34 which substantially surrounds outlet terminals 32 and is provided with a pair of spaced openings or slots 36 adjacent the terminals to receive conductive electrical prongs 38 associated with a plug 39, as illustrated in FIG. 4.
- the electrical outlet terminals 32 remain isolated from the primary voltage source until closure of switch mechanism 12 has been effected by depression of the associated lever arm 28.
- This operation is achieved by way of an elongated actuation prong 40 associated with plug 39.
- the actuation prong is of a configuration similar to the cross section of passageway 30 such that it is easily inserted therein upon insertion of the electrical prongs 38 into slots 36 for contact with terminals 32.
- Switch actuator 28 is located remotely from the opening of passageway 30, such that it is not engaged by the actuation prong until the plug is fully inserted into position, as illustrated in FIG. 4.
- the electrical terminals 32 remain isolated from the primary voltage source until the plug has effected closure of the switch mechanism 12.
- the construction of the plug member associated with the present invention may be seen in more detail.
- this construction is similar to that of conventional electrical plugs with ground prongs.
- the actuation prong 40 associated with plug member 39 is not connected to a ground wire or circuit as normally done.
- actuation prong 40 may be made of non-conductive materials, such that it may be readily distinguishable from a conductive ground terminal, or conventional grounded plug constructions may be utilized so long as the ground prong is insulated from the electrical wiring.
- standard commercially available plugs may be utilized with the electrical outlet assembly of the present invention. This permits convenient installation and use of the outlet assembly of the present invention in place of conventional household outlets to increase safety by providing isolation of the outlet terminals.
- the present invention be limited to the exact configuration or mounting of the outlet socket and associated switch mechanism illustrated in the drawings, minor changes in such falling within the scope of the present invention.
- An electrical socket assembly comprising an insulated housing with first and second prong-receiving slots therein, a pair of electrical terminals disposed in said first and second prong-receiving slots, a third prong-receiving slot in said housing and aligned with a passageway coextensive therewith and adapted to receive an actuation prong on an electrical plug, said passageway being of elongated configuration with said third slot at one end thereof, a switch mounted to said housing adjacent said passageway and including an actuator extending into said passageway remote from said third slot and being movable between opened and closed positions, said elongated passageway including an opening, said switch actuator comprising an elongated lever arm pivotally mounted with respect to said switch for movement about an axis transversely disposed of said-elongated passageway, and an electrical plug including a pair of conductive prongs extending throughsaid first and second slots and in engagement with said pair of electrical terminals and an actuation prong extending into said passageway and in operative wiping
- said plug and said housing include oppositely disposed surface areas around said prongs and openings, and a raised lip integral with said housing and closely surrounding said surface areas, said electrical terminals being energized upon full insertion of said plug, such that said surface areas are immediately adjacent each other and shielded by said lip whereby personal contact with said electrical prongs is prevented.
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- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
An electrical outlet and safety control circuit for preventing accidental shock comprising a socket with a pair of outlet terminals isolated from a primary voltage source by normally opened relay contacts, and a switch actuatable by an elongated pin on the associated electrical plug upon insertion thereof into the socket, the switch being serially connected to the relay for closure thereof and simultaneous energization of the electrical terminals upon complete insertion of the plug.
Description
United States Patent 1 McGill 1 Aug. 28, 1973 1 ISOLATED ELECTRICAL OUTLET ASSEMBLY [76] Inventor: William B. McGill, 9612-13 Roosevelt Dr., Ellsworth A.F.B., S. Dak. 57706 [22] Filed: Apr. 7, 1972 [21] App]. No.: 241,999
[52] US. Cl. ZOO/51.09 [51] Int. Cl IIOlr 33/30 [58] Field of Search ZOO/51.09
[56] References Cited UNITED STATES PATENTS 3,280,278 10/1966 Ganzert ZOO/31.09
FOREIGN PATENTS OR APPLICATIONS 1,119,671 4/1956 France ZOO/51.09
3/1960 Great Britain .Q 200151.09 7/1951 Netherlands ..200/51.09
Primary Examiner-David Smith, Jr. Attorney-Harvey B. Jacobson [57] ABSTRACT An electrical outlet and safety control circuit for pre- 1 venting accidental shock comprising a socket with a pair of outlet terminals isolated from a primary voltage source by normally opened relay contacts, and a switch actuatable by an elongated pin on the associated electrical plug upon insertion thereof into the socket, the switch being serially connected to the relay for closure thereof and simultaneous energization of the electrical terminals upon complete insertion of the plug.
3 Claims, 5 Drawing Figures ISOLATED ELECTRICAL OUTLET ASSEMBLY The present invention is generally related to electrical outlets and, more particularly, to an improved electrical outlet assembly including safety means for preventing accidental shock to a user.
In the past, various electrical plug assemblies have been provided, several of which included safety means for preventing accidental shock to a user or a child who may accidentally poke his fingers into the outlet socket. However, such conventional devices have either required specially constructed plugs or were unduly complex in nature so as to render them impractical for household use or installation.
Therefore, it is an object of the present invention to provide an improved electrical outlet assembly which prevents accidental shock, is relatively inexpensive to manufacture and install, and which may be operated with the use of standard commercially available electrical plugs.
Another object of the present invention is to provide a unique electrical outlet assembly which includes a compact socket with a switch mounted therein which is effective in a control circuit to isolate the sockets electrical terminals until insertion of the plug has been completed, thereby greatly reducing the possibilities of accidental shock.
It is a further object of the present invention to provide a versatile electrical outlet assembly which includes a control relay actuatable by closure of a safety switch and effective to isolate the socket terminals until the associated electrical plug has been fully inserted into the socket to close the safety switch.
These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout.
FIG. 1 is a schematic diagram of the electrical circuitry associated with the outlet assembly of the present invention.
FIG. 2 is a front elevation of the outlet of the present invention mounted in a typical junction box.
FIG. 3 is a side elevation of the outlet and junction box illustrated in FIG. 2, with sections removed.
FIG. 4 is a side elevation of the electrical outlet and junction box illustrated in FIG. 3 but with a plug fully inserted therein.
FIG. 5 is a perspective view of the electrical plug associated with the present invention.
Referring now, more particularly, to FIG. 1 of the drawings, the circuitry associated with the present invention is generally indicated by the numeral and includes a conventional switch mechanism 12 including normally opened contacts, not illustrated, serially connected to a control relay l4 and a secondary winding 16 associated with a control transformer 18. The control transformer is provided with a primary winding 20 which is connected to a primary source of voltage, such as l 10 VAC indicated at 22. An outlet socket 24 is provided in a conventional mounting 26 and includes a pair of electrical outlet terminals connected to the voltage source through normally opened contacts CR] and CR2, respectively, of the control relay 14.
With reference to FIGS. 2-4, it will be observed that switch mechanism 12 is provided with an actuator 26 in the form of a pivotally mounted lever arm, a portion of which extends through an opening 29 into an elongated passageway 30 associated with the outlet socket. The switch mechanism is such that the actuators pivotal axis is located below and transverse of passageway 30, depression of the actuator being effective to close the normally opened contacts of the switch mechanism to effect energization of control relay 14. This operation, in turn, causes closure of the control relay contacts CR1 and CR2, thereby connecting conductive outlet terminals 32 of the outlet socket to the primary voltage source. Preferably, the outlet socket is comprised of an insulated housing 34 which substantially surrounds outlet terminals 32 and is provided with a pair of spaced openings or slots 36 adjacent the terminals to receive conductive electrical prongs 38 associated with a plug 39, as illustrated in FIG. 4.
As explained above, the electrical outlet terminals 32 remain isolated from the primary voltage source until closure of switch mechanism 12 has been effected by depression of the associated lever arm 28. This operation is achieved by way of an elongated actuation prong 40 associated with plug 39. The actuation prong is of a configuration similar to the cross section of passageway 30 such that it is easily inserted therein upon insertion of the electrical prongs 38 into slots 36 for contact with terminals 32. Switch actuator 28 is located remotely from the opening of passageway 30, such that it is not engaged by the actuation prong until the plug is fully inserted into position, as illustrated in FIG. 4. Thus, the electrical terminals 32 remain isolated from the primary voltage source until the plug has effected closure of the switch mechanism 12. This prevents accidental shock by contact of ones fingers with the electrical terminals of the socket member or the electrical prongs associated with the plug member. The possibilities of shock are further reduced by providing a flange or lip 42 which extends around the electrical outlet and overlaps a peripheral edge portion 44 of the plug member.
Referring to FIG. 5, the construction of the plug member associated with the present invention may be seen in more detail. Preferably, this construction is similar to that of conventional electrical plugs with ground prongs. However, the actuation prong 40 associated with plug member 39 is not connected to a ground wire or circuit as normally done. If desired, actuation prong 40 may be made of non-conductive materials, such that it may be readily distinguishable from a conductive ground terminal, or conventional grounded plug constructions may be utilized so long as the ground prong is insulated from the electrical wiring. As such, standard commercially available plugs may be utilized with the electrical outlet assembly of the present invention. This permits convenient installation and use of the outlet assembly of the present invention in place of conventional household outlets to increase safety by providing isolation of the outlet terminals. Of course, it is not intended that the present invention be limited to the exact configuration or mounting of the outlet socket and associated switch mechanism illustrated in the drawings, minor changes in such falling within the scope of the present invention.
The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.
What is claimed as new is as follows:
1. An electrical socket assembly comprising an insulated housing with first and second prong-receiving slots therein, a pair of electrical terminals disposed in said first and second prong-receiving slots, a third prong-receiving slot in said housing and aligned with a passageway coextensive therewith and adapted to receive an actuation prong on an electrical plug, said passageway being of elongated configuration with said third slot at one end thereof, a switch mounted to said housing adjacent said passageway and including an actuator extending into said passageway remote from said third slot and being movable between opened and closed positions, said elongated passageway including an opening, said switch actuator comprising an elongated lever arm pivotally mounted with respect to said switch for movement about an axis transversely disposed of said-elongated passageway, and an electrical plug including a pair of conductive prongs extending throughsaid first and second slots and in engagement with said pair of electrical terminals and an actuation prong extending into said passageway and in operative wiping engagement with said switch lever arm to maintain it substantially parallel to said passageway when in said closed position.
2. The structure set forth in claim 1 wherein said prongs are substantially parallel to each other, said third prong being of greater length than said first and second prongs.
3. The combination set forth in claim 1 wherein said plug and said housing include oppositely disposed surface areas around said prongs and openings, and a raised lip integral with said housing and closely surrounding said surface areas, said electrical terminals being energized upon full insertion of said plug, such that said surface areas are immediately adjacent each other and shielded by said lip whereby personal contact with said electrical prongs is prevented.
Claims (3)
1. An electrical socket assembly comprising an insulated housing with first and second prong-receiving slots therein, a pair of electrical terminals disposed in said first and second prongreceiving slots, a third prong-receiving slot in said housing and aligned with a passageway coextensive therewith and adapted to receive an actuation prong on an electrical plug, said passageway being of elongated configuration with said third slot at one end thereof, a switch mounted to said housing adjacent said passageway and including an actuator extending into said passageway remote from said third slot and being movable between opened and closed positions, said elongated passageway including an opening, said switch actuator comprising an elongated lever arm pivotally mounted with respect to said switch for movement about an axis transversely disposed of said elongated passageway, and an electrical plug including a pair of conductive prongs extending through said first and second slots and in engagement with said pair of electrical terminals and an actuation prong extending into said passageway and in operative wiping engagement with said switch lever arm to maintain it substantially parallel to said passageway when in said closed position.
2. The structure set forth in claim 1 wherein said prongs are substantially parallel to each other, said third prong being of greater length than said first and second prongs.
3. The combination set forth in claim 1 wherein said plug and said housing include oppositely disposed surface areas around said prongs and openings, and a raised lip integral with said housing and closely surrounding said surface areas, said electrical terminals being energized upon full insertion of said plug, such that said surface areas are immediately adjacent each other and shielded by said lip whereby personal contact with said electrical prongs is prevented.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24199972A | 1972-04-07 | 1972-04-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3755635A true US3755635A (en) | 1973-08-28 |
Family
ID=22913072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00241999A Expired - Lifetime US3755635A (en) | 1972-04-07 | 1972-04-07 | Isolated electrical outlet assembly |
Country Status (1)
Country | Link |
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US (1) | US3755635A (en) |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846598A (en) * | 1973-11-02 | 1974-11-05 | M Mucsi | Safety, electrical grounding outlet with safety switch |
US4008403A (en) * | 1974-09-30 | 1977-02-15 | Rose Manning I | Safety circuit and socket construction |
EP0071724A1 (en) * | 1981-06-23 | 1983-02-16 | Olympus Optical Co., Ltd. | Explosion-proof electric apparatus |
US4853823A (en) * | 1986-10-23 | 1989-08-01 | Amp Incorporated | Safety receptacle |
EP0332475A3 (en) * | 1988-03-11 | 1991-03-13 | Black & Decker Inc. | Battery charger and battery packs |
US5256076A (en) * | 1991-04-10 | 1993-10-26 | Hamlin Jay T | Safety electrical receptacle |
US5426552A (en) * | 1991-07-08 | 1995-06-20 | Aditan, Inc. | Electrical supply safety socket |
EP0687039A3 (en) * | 1994-06-02 | 1996-01-10 | Molex Inc | |
US5485340A (en) * | 1991-07-08 | 1996-01-16 | Aditan, Inc. | Electrical supply safety plug |
US5542425A (en) * | 1994-12-20 | 1996-08-06 | Acuson Corporation | Apparatus and method for preventing contact damage in electrical equipment |
US5967815A (en) * | 1998-03-19 | 1999-10-19 | Marc A. Schlessinger | Variable orientation switching type electrical receptacle |
USD429694S (en) | 1998-09-11 | 2000-08-22 | Marc A. Schlessinger | Housing and bracket portions of an electrical receptacle |
US6111210A (en) * | 1999-07-30 | 2000-08-29 | Allison; John B. | Electrical safety outlet |
US6454604B1 (en) * | 2000-09-06 | 2002-09-24 | Astec International Limited | Two-layer enclosure for electrical assemblies |
US6455789B1 (en) | 2001-02-02 | 2002-09-24 | Smart Products, Inc. | Shock-resistant electrical outlet |
US6486571B1 (en) | 2002-03-01 | 2002-11-26 | Ford Global Technologies, Inc. | Power delivery and connection circuit for an automotive vehicle |
US20040201934A1 (en) * | 2003-04-10 | 2004-10-14 | Richard Wolpert | Outlet panel for single pin connectors |
US20070149013A1 (en) * | 2005-12-22 | 2007-06-28 | Bryant Eastham | Electrical outlets and plugs with local power enabling and disabling |
US20080105525A1 (en) * | 2006-11-08 | 2008-05-08 | Chei-Wen Chen | Electrical socket with latching mechanism |
US20110316352A1 (en) * | 2010-06-29 | 2011-12-29 | Canon Kabushiki Kaisha | Electric power supply control apparatus and image forming apparatus |
US20140199863A1 (en) * | 2011-12-24 | 2014-07-17 | Shifeng Lin | Power Supply Connection Structure Device |
US20150236455A1 (en) * | 2014-02-16 | 2015-08-20 | Shenzhen Zhongke Electrical Technology Co., Ltd | Power Supply Connection Structure Device |
US10840651B2 (en) * | 2017-04-18 | 2020-11-17 | National Christmas Products Llc | Electrical plug for a safety grounded tree |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1119671A (en) * | 1954-07-31 | 1956-06-22 | Toury R | Non-sparking mobile sockets |
GB830720A (en) * | 1958-01-23 | 1960-03-16 | Hubbell Inc Harvey | Electric connectors for industrial uses |
US3280278A (en) * | 1964-11-18 | 1966-10-18 | Pyle National Co | Interlocking plug and receptacle electrical connector |
-
1972
- 1972-04-07 US US00241999A patent/US3755635A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1119671A (en) * | 1954-07-31 | 1956-06-22 | Toury R | Non-sparking mobile sockets |
GB830720A (en) * | 1958-01-23 | 1960-03-16 | Hubbell Inc Harvey | Electric connectors for industrial uses |
US3280278A (en) * | 1964-11-18 | 1966-10-18 | Pyle National Co | Interlocking plug and receptacle electrical connector |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846598A (en) * | 1973-11-02 | 1974-11-05 | M Mucsi | Safety, electrical grounding outlet with safety switch |
US4008403A (en) * | 1974-09-30 | 1977-02-15 | Rose Manning I | Safety circuit and socket construction |
US4093336A (en) * | 1974-09-30 | 1978-06-06 | Rose Manning I | Safety circuit and socket construction |
EP0071724A1 (en) * | 1981-06-23 | 1983-02-16 | Olympus Optical Co., Ltd. | Explosion-proof electric apparatus |
US4853823A (en) * | 1986-10-23 | 1989-08-01 | Amp Incorporated | Safety receptacle |
EP0332475A3 (en) * | 1988-03-11 | 1991-03-13 | Black & Decker Inc. | Battery charger and battery packs |
US5256076A (en) * | 1991-04-10 | 1993-10-26 | Hamlin Jay T | Safety electrical receptacle |
US5426552A (en) * | 1991-07-08 | 1995-06-20 | Aditan, Inc. | Electrical supply safety socket |
US5485340A (en) * | 1991-07-08 | 1996-01-16 | Aditan, Inc. | Electrical supply safety plug |
EP0687039A3 (en) * | 1994-06-02 | 1996-01-10 | Molex Inc | |
US5513999A (en) * | 1994-06-02 | 1996-05-07 | Molex Incorporated | Electrical connector assembly with a switch |
US5542425A (en) * | 1994-12-20 | 1996-08-06 | Acuson Corporation | Apparatus and method for preventing contact damage in electrical equipment |
US5967815A (en) * | 1998-03-19 | 1999-10-19 | Marc A. Schlessinger | Variable orientation switching type electrical receptacle |
USD429694S (en) | 1998-09-11 | 2000-08-22 | Marc A. Schlessinger | Housing and bracket portions of an electrical receptacle |
US6111210A (en) * | 1999-07-30 | 2000-08-29 | Allison; John B. | Electrical safety outlet |
US6454604B1 (en) * | 2000-09-06 | 2002-09-24 | Astec International Limited | Two-layer enclosure for electrical assemblies |
US6455789B1 (en) | 2001-02-02 | 2002-09-24 | Smart Products, Inc. | Shock-resistant electrical outlet |
US6486571B1 (en) | 2002-03-01 | 2002-11-26 | Ford Global Technologies, Inc. | Power delivery and connection circuit for an automotive vehicle |
US20040201934A1 (en) * | 2003-04-10 | 2004-10-14 | Richard Wolpert | Outlet panel for single pin connectors |
US7151234B2 (en) * | 2003-04-10 | 2006-12-19 | Richard Wolpert | Outlet panel for single pin connectors |
US20070149013A1 (en) * | 2005-12-22 | 2007-06-28 | Bryant Eastham | Electrical outlets and plugs with local power enabling and disabling |
US20080105525A1 (en) * | 2006-11-08 | 2008-05-08 | Chei-Wen Chen | Electrical socket with latching mechanism |
US7442891B2 (en) * | 2006-11-08 | 2008-10-28 | Chi-Wen Chen | Electrical socket with latching mechanism |
US20110316352A1 (en) * | 2010-06-29 | 2011-12-29 | Canon Kabushiki Kaisha | Electric power supply control apparatus and image forming apparatus |
US20140199863A1 (en) * | 2011-12-24 | 2014-07-17 | Shifeng Lin | Power Supply Connection Structure Device |
US9413113B2 (en) * | 2011-12-24 | 2016-08-09 | Shenzhen Zhongke Electrical Technology Co., Ltd. | Power supply connection structure device |
US20150236455A1 (en) * | 2014-02-16 | 2015-08-20 | Shenzhen Zhongke Electrical Technology Co., Ltd | Power Supply Connection Structure Device |
US10840651B2 (en) * | 2017-04-18 | 2020-11-17 | National Christmas Products Llc | Electrical plug for a safety grounded tree |
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