US3811104A - Safety device for electrical outlets - Google Patents

Safety device for electrical outlets Download PDF

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Publication number
US3811104A
US3811104A US23271072A US3811104A US 3811104 A US3811104 A US 3811104A US 23271072 A US23271072 A US 23271072A US 3811104 A US3811104 A US 3811104A
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Prior art keywords
plug
hole
sockets
receptacle
attachment
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Expired - Lifetime
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T Caldwell
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T Caldwell
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00-H01R33/00
    • H01R13/62Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • H01R13/6395Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap for wall or panel outlets

Abstract

A safety device for electrical outlets which comprises an attachment for retaining electrical plugs in the sockets of a receptacle so as to preclude the inadvertent removal thereof as well as the insertion of foreign objects into the receptacles. Moreover, the present safety attachment is further adapted to provide the same safety feature in the event that only one electrical plug is mounted in a duplex receptacle in which instance the unused socket is covered to prevent the insertion of foreign objects.

Description

United States Patent 1191 Caldwell SAFETY DEVICE FOR ELECTRICAL OUTLETS [76] Inventor: Thomas B. Caldwell, 50 W. Broad St., Columbus, Ohio 43215 221 Filedw Mar. 8, 1972 21 Appl. NO; 232,710

[52] US. CL...

[51] Int. Cl. HOlr 13/44, HOlr 13/54 [58] Field of Search 339/36, 39, 75-79, 339/82 [56] References Cited UNITED STATES PATENTS 2,659,059 11/1953 Johnson 339 75' P 3,159,446 l2/l964 Protzmann 339/82 3,363,216 H1968 Benedetto 339 39 2,716,225 8/1955 McCubbin..- 339/77 m 3,811,104 14 1 May 14, 1974 Dalton 339/75 P Sadasky 339/77 Primary Examiner-Joseph H. McGlynn Attorney, Agent, or FirmPalmer Fultz 57 ABSTRACT A safety device for electrical outlets which comprises an attachment for retaining electrical plugs in the sockets of a receptacle so as to preclude the inadvertent removal thereof asfwell as the insertion of foreign objects into the receptacles. Moreover, the present safety attachment is further adapted to provide the same safety feature in the event that only one electrical plug is mounted in a duplex receptacle in which instance the unused socket is covered to prevent the insertion of foreign objects.

3 Claims, 6 Drawing Figures taining plugs in one or more sockets of such outlets.

In general, the device of the present invention is applicable to an electrical outlet of the type that includes a wall type receptacle that includes spaced sockets, a cover, and a hole intermediate said sockets for mounting said cover in the conventional manner.

In accordance with one aspect of the present invention, the apparatus comprises a plug retaining plate means adapted to overly two electrical plugs when disposed in said spaced sockets so as to prevent inadvertent disconnection thereof, and to preclude inadvertent removal of the plugs by small children.

In accordance with a second aspect of the present invention, a modified plug retaining plate is provided for use when only one plug is mounted in a duplex 'type receptacle, said modified retaining plate being adapted to cover the empty socket, as well as retain-the single plug, thereby precluding the insertion by small children of foreign objects into the empty socket.

It is therefor an object of the present invention to provide a safety attachment for an electrical outlet that prevents the removal of plugs from the sockets as well as the insertion of foreign objects into the empty sockets thereof.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying. drawings wherein preferred forms of embodiments-of the invention are clearly shown.

IN, THE DRAWINGS:

FIG. 1 is a perspective view of an electrical outlet provided with a safety attachment constructed in accordance with the present invention;

FIG. 2 is a perspective view of a second electrical outlet with a single plug mounted thereon and provided with a second safety attachment comprising a modification of the present invention;

FIG. 3 is a plan view of the safety attachment of FIG.

FIG. 4 is a side elevational view of the safety attachment of FIG. I;'

' FIG. 5 is a plan view of the safety attachment of FIG.

2; and

FIG. 6 is a side elevational view of the safety attachment of FIG. 2.

. adapted to overlie a plug mounted in one of said sockets l2 and 14.

The inventive combination further includes a plate mounting hole 22 and a hole 28 in the attachment, said holes 22 and 28 being aligned when said attachment 24 is in a plug retaining position.

The inventive combination further includes a threaded element 38 adapted to be extendedfreely through the hole 28 in the attachment and into threaded engagement with the cover mounting hole in spaced protrusions and the receptacle.

This embodiment indicated generally at 24 includes oppositely extending co-planer protrusions 30 and 30 which simultaneously overlie a second plug 18.

When the threaded element 38 is extended freely through hole 28' in the attachment and into threaded engagement with the threaded hole of the receptacle both of the plugs 16 and 18 are securely retained therein against accidental disengagement and, indeed, removal therefrom by a child whose attention has been directed to the electrical outlet.

Reference is next made toa second modification of the present invention wherein a second plug retaining plate 32 is shown in FIG. 2.

In this embodiment the plug retaining plate includes spaced projections 34 which serve to retain the single plug 16 within the socket by engagement of a threaded element 40 in a hole 22 in the receptacle.

Since only one plug has been inserted into the receptacle it is an object of this invention to prevent the other receptacle 14, FIG. 2, from being available to small children for the dangerous insertion of foreign objects.

- In this connection attention is called to FIGS. 2, 5, and 6 which show a cover plate 36 which is arranged to closely cover said other receptacle 14 when the threaded element 40 is used to retain the plug retaining plate 32 in a locked position wherein plug 16 is restrained against removal. Y

In view of the aboveit will be seen that with the embodiment of FIG. I as well as with the embodiment of FIG. 2 the plug or plugs will be firmly retained within the sockets of the receptacle such that it is substantially impossible for a small child to remove them and, moreover, in the event that only one of the plugs, such as plug 16 is inserted, then in that event the attachment 32 not only serves to retain the plug 16 but in addition serves to completely cover the second socket 14 of the receptacle such that the insertion of a foreign object which would cause a short is precluded.

I claim:

1. An attachment for an electrical outlet of the typ that includes a receptacle forming spaced sockets, a i

cover and a cover mounting hole intermediate said sockets, said attachment comprising a unitary plug retaining plate formed with spaced protrusions forming an open-ended slot for overlying a plug mounted in one of said sockets and a plate mounting hole aligned with said cover mounting hole in said receptacle; and a threaded element extended through said plate mounting hole and said cover and in threaded engagement with said cover mounting hole in said receptacle.

2. The attachment defined in claim 1 wherein said plug retaining plate includes a second set of spaced unitary protrusions for overlying a second plug mounted in the other of said sockets.

3. An attachment for an electrical outlet of the type that includes a receptacle forming spaced sockets and a cover mounting hole intermediate said sockets, said attachment comprising a unitary plug retaining plate formed with spaced protrusions for overlying a plug mounted in one of said sockets and a plate mounting hole aligned with said cover mounting hole in said receptacle; and a threaded element extended through said plate mounting hole and in threaded engagement with said cover mounting hole in said receptacle, said plug retaining plate including a unitary socket covering portion for directly overlying the other of said sockets when empty, and a central offset portion between said said socket covering portion.

Claims (3)

1. An attachment for an electrical outlet of the type that includes a receptacle forming spaced sockets, a cover and a cover mounting hole intermediate said sockets, said attachment comprising a unitary plug retaining plate formed with spaced protrusions forming an open-ended slot for overlying a plug mounted in one of said sockets and a plate mounting hole aligned with said cover mounting hole in said receptacle; and a threaded element extended through said plate mounting hole and said cover and in threaded engagement with said cover mounting hole in said receptacle.
2. The attachment defined in claim 1 wherein said plug retaining plate includes a second set of spaced unitary protrusions for overlying a second plug mounted in the other of said sockets.
3. An attachment for an electrical outlet of the type that includes a receptacle forming spaced sockets and a cover mounting hole intermediate said sockets, said attachment comprising a unitary plug retaining plate formed with spaced protrusions for overlying a plug mounted in one of said sockets and a plate mounting hole aligned with said cover mounting hole in said receptacle; and a threaded element extended through said plate mounting hole and in threaded engagement with said cover mounting hole in said receptacle, said plug retaining plate including a unitary socket covering portion for directly overlying the other of said sockets when empty, and a central offset portion between said spaced protrusions and said socket covering portion.
US3811104A 1972-03-08 1972-03-08 Safety device for electrical outlets Expired - Lifetime US3811104A (en)

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Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915476A (en) * 1975-01-16 1975-10-28 Autac Inc Electrical plug support bracket
US4105274A (en) * 1977-04-01 1978-08-08 Casey Richard W Child safety device for retaining electrical plugs
US4378140A (en) * 1979-11-13 1983-03-29 Mckee Richard W Electrical cord-retaining apparatus
US4494809A (en) * 1983-02-15 1985-01-22 Leonard Soloman Security attachment for electrical plug
US4508933A (en) * 1983-03-01 1985-04-02 Carvel Corporation Electric outlet cover
US4579410A (en) * 1983-02-15 1986-04-01 Leonard Soloman Security attachment for electrical plug
US4618200A (en) * 1985-02-22 1986-10-21 David Roberts Electrical plug restraint system
DE3512893A1 (en) * 1985-04-11 1986-11-13 Wilfried Poellet Plug socket having plug connectors for cable connection
US4662697A (en) * 1986-05-20 1987-05-05 Paul Moses Safety device for electrical outlet
US4718856A (en) * 1986-01-02 1988-01-12 Pinkerton Michael B Safety covers for electrical outlets (II)
EP0321169A2 (en) * 1987-12-15 1989-06-21 Honda Giken Kogyo Kabushiki Kaisha Electrical connector enabling prevention of incomplete coupling
US4846708A (en) * 1988-02-11 1989-07-11 Michigan Bell Telephone Company Jack security device
DE3805701A1 (en) * 1988-02-24 1989-08-31 Pfaff Haushaltmasch Device for securing electrical plug connections against becoming inadvertently detached
US4895527A (en) * 1989-05-22 1990-01-23 Brown Martin C Safety cover
US4911646A (en) * 1988-02-11 1990-03-27 Michigan Bell Telephone Company Jack security device
GB2240669A (en) * 1990-01-31 1991-08-07 Electrobitions Ltd Electric sockets
US5174293A (en) * 1988-11-17 1992-12-29 Olympus Optical Co., Ltd. Medical apparatus including on isolating transformer apparatus for isolating medical apparatus from non-medical apparatus to prevent electrical shocks to patients
US5226836A (en) * 1992-06-30 1993-07-13 Tdw Delaware, Inc. Cable strain relief device
US5378882A (en) * 1992-09-11 1995-01-03 Symbol Technologies, Inc. Bar code symbol reader with locking cable connector assembly
US6257907B1 (en) * 1999-03-24 2001-07-10 Dr. Johannes Heidenhain Gmbh Angular position encoder
US6520792B2 (en) * 2000-12-04 2003-02-18 Delta Electronics, Inc. Adjustable securing device
US20040166718A1 (en) * 2003-01-31 2004-08-26 Yoest Daniel T. Power cord plug securing device
US20060289830A1 (en) * 2005-06-24 2006-12-28 Innolux Display Corp. Liquid crystal display device with power connection stabilizer
US20080068822A1 (en) * 2006-09-19 2008-03-20 David Spartano Light device
US20100053851A1 (en) * 2008-08-28 2010-03-04 Abbott Diabetes Care, Inc. Apparatus for preventing electrical shock in devices
US7695305B1 (en) * 2008-01-29 2010-04-13 Juniper Networks, Inc. Connector retainer
US7804691B1 (en) * 2006-05-18 2010-09-28 Utility Associates, Inc. Assembly for protecting PC cards and peripheral connectors
US20100268053A1 (en) * 2009-04-15 2010-10-21 Abbott Diabetes Care Inc. Method and Device for Detecting USB Cable Connection
US20100285681A1 (en) * 2008-01-28 2010-11-11 Panasonic Corp. Connector holding device
US8070111B1 (en) * 2010-05-20 2011-12-06 Charles Zeller Electrical cord cleat
US20120318933A1 (en) * 2010-01-15 2012-12-20 Eddie Kimbrell Cable tie-down bracket
US20130109222A1 (en) * 2011-10-28 2013-05-02 Nueteq Technology, Inc. Connector retaining device
US8529285B1 (en) * 2010-12-02 2013-09-10 Crystal Group, Inc. Cable retention clip for rugged applications
US20140009876A1 (en) * 2012-07-09 2014-01-09 Aopen Inc. Electronic device and wire fixing mechanism thereof
GB2510923A (en) * 2013-03-08 2014-08-20 James Michael Savage Semi-permanent alarm system
US20140242830A1 (en) * 2013-02-27 2014-08-28 Nuk Usa Llc Child-resistant plug
US9147973B1 (en) * 2013-09-11 2015-09-29 Michael W. Madison Enclosure for wall charger
EP2800464A3 (en) * 2010-02-25 2015-11-04 Toshiba TEC Kabushiki Kaisha Information processing terminal and method for preventing an electric shock from the information processing terminal
US20160064850A1 (en) * 2014-08-27 2016-03-03 Robert John Draper, JR. Apparatus for covering electrical plugs
US9392869B2 (en) * 2014-05-09 2016-07-19 Norman R. Byrne Clamp for surface-mounted devices
USD793209S1 (en) * 2016-03-22 2017-08-01 Tower Manufacturing Corp Power cord retainer
US9859655B2 (en) * 2014-02-14 2018-01-02 Boss Controls, Llc Smart plug system and method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569037A (en) * 1949-12-22 1951-09-25 John J Dalton Releasable lock for electric plugs
US2659059A (en) * 1952-10-20 1953-11-10 Kenneth M Johnson Retainer for electrical attachment plugs
US2675530A (en) * 1952-04-04 1954-04-13 Sadasky Anthony Holding clamp for multiple outlet plugs
US2716225A (en) * 1953-06-19 1955-08-23 Glenn O Mccubbin Cover plate and safety-attached plug
US3159446A (en) * 1961-11-13 1964-12-01 Gen Time Corp Pilferproof wall plate
US3363216A (en) * 1965-10-21 1968-01-09 Patrick J. Benedetto Safety attachment for electrical outlet fixtures

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2569037A (en) * 1949-12-22 1951-09-25 John J Dalton Releasable lock for electric plugs
US2675530A (en) * 1952-04-04 1954-04-13 Sadasky Anthony Holding clamp for multiple outlet plugs
US2659059A (en) * 1952-10-20 1953-11-10 Kenneth M Johnson Retainer for electrical attachment plugs
US2716225A (en) * 1953-06-19 1955-08-23 Glenn O Mccubbin Cover plate and safety-attached plug
US3159446A (en) * 1961-11-13 1964-12-01 Gen Time Corp Pilferproof wall plate
US3363216A (en) * 1965-10-21 1968-01-09 Patrick J. Benedetto Safety attachment for electrical outlet fixtures

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915476A (en) * 1975-01-16 1975-10-28 Autac Inc Electrical plug support bracket
US4105274A (en) * 1977-04-01 1978-08-08 Casey Richard W Child safety device for retaining electrical plugs
US4378140A (en) * 1979-11-13 1983-03-29 Mckee Richard W Electrical cord-retaining apparatus
US4494809A (en) * 1983-02-15 1985-01-22 Leonard Soloman Security attachment for electrical plug
US4579410A (en) * 1983-02-15 1986-04-01 Leonard Soloman Security attachment for electrical plug
US4508933A (en) * 1983-03-01 1985-04-02 Carvel Corporation Electric outlet cover
US4618200A (en) * 1985-02-22 1986-10-21 David Roberts Electrical plug restraint system
DE3512893A1 (en) * 1985-04-11 1986-11-13 Wilfried Poellet Plug socket having plug connectors for cable connection
US4718856A (en) * 1986-01-02 1988-01-12 Pinkerton Michael B Safety covers for electrical outlets (II)
US4662697A (en) * 1986-05-20 1987-05-05 Paul Moses Safety device for electrical outlet
EP0321169A3 (en) * 1987-12-15 1990-05-23 Honda Giken Kogyo Kabushiki Kaisha Electrical connector enabling prevention of incomplete coupling
EP0321169A2 (en) * 1987-12-15 1989-06-21 Honda Giken Kogyo Kabushiki Kaisha Electrical connector enabling prevention of incomplete coupling
US4911646A (en) * 1988-02-11 1990-03-27 Michigan Bell Telephone Company Jack security device
US4846708A (en) * 1988-02-11 1989-07-11 Michigan Bell Telephone Company Jack security device
DE3805701A1 (en) * 1988-02-24 1989-08-31 Pfaff Haushaltmasch Device for securing electrical plug connections against becoming inadvertently detached
US5174293A (en) * 1988-11-17 1992-12-29 Olympus Optical Co., Ltd. Medical apparatus including on isolating transformer apparatus for isolating medical apparatus from non-medical apparatus to prevent electrical shocks to patients
US4895527A (en) * 1989-05-22 1990-01-23 Brown Martin C Safety cover
GB2240669A (en) * 1990-01-31 1991-08-07 Electrobitions Ltd Electric sockets
US5226836A (en) * 1992-06-30 1993-07-13 Tdw Delaware, Inc. Cable strain relief device
US5378882A (en) * 1992-09-11 1995-01-03 Symbol Technologies, Inc. Bar code symbol reader with locking cable connector assembly
US6257907B1 (en) * 1999-03-24 2001-07-10 Dr. Johannes Heidenhain Gmbh Angular position encoder
US6520792B2 (en) * 2000-12-04 2003-02-18 Delta Electronics, Inc. Adjustable securing device
US7470141B2 (en) 2003-01-31 2008-12-30 Yoest Daniel T Power cord plug securing device
US20040166718A1 (en) * 2003-01-31 2004-08-26 Yoest Daniel T. Power cord plug securing device
US7542104B2 (en) * 2005-06-24 2009-06-02 Innocom Technology (Shenzhen) Co., Ltd. Liquid crystal display device with power connection stabilizer
US20060289830A1 (en) * 2005-06-24 2006-12-28 Innolux Display Corp. Liquid crystal display device with power connection stabilizer
US7804691B1 (en) * 2006-05-18 2010-09-28 Utility Associates, Inc. Assembly for protecting PC cards and peripheral connectors
US20080068822A1 (en) * 2006-09-19 2008-03-20 David Spartano Light device
US7553062B2 (en) 2006-09-19 2009-06-30 Eveready Battery Company, Inc. Light device
US20090225568A1 (en) * 2006-09-19 2009-09-10 Eveready Battery Company, Inc. Light Device
US8029308B2 (en) * 2008-01-28 2011-10-04 Panasonic Corporation Connector holding device
US20100285681A1 (en) * 2008-01-28 2010-11-11 Panasonic Corp. Connector holding device
US7695305B1 (en) * 2008-01-29 2010-04-13 Juniper Networks, Inc. Connector retainer
US20100255564A1 (en) * 2008-08-28 2010-10-07 Abbott Diabetes Care Inc. Apparatus for Preventing Electrical Shock in Devices
US20100255517A1 (en) * 2008-08-28 2010-10-07 Abbott Diabetes Care Inc. Apparatus for Preventing Electrical Shock in Devices
US20100255696A1 (en) * 2008-08-28 2010-10-07 Abbott Diabetes Care Inc. Apparatus for Preventing Electrical Shock in Devices
US20100255566A1 (en) * 2008-08-28 2010-10-07 Abbott Diabetes Care Inc. Apparatus for Preventing Electrical Shock in Devices
US8142211B2 (en) 2008-08-28 2012-03-27 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US8066522B2 (en) 2008-08-28 2011-11-29 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US7946866B2 (en) 2008-08-28 2011-05-24 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US20110133698A1 (en) * 2008-08-28 2011-06-09 Abbott Diabetes Care Inc. Apparatus for Preventing Electrical Shock in Devices
US8025509B2 (en) * 2008-08-28 2011-09-27 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US8029297B2 (en) * 2008-08-28 2011-10-04 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US20100053851A1 (en) * 2008-08-28 2010-03-04 Abbott Diabetes Care, Inc. Apparatus for preventing electrical shock in devices
US8029298B2 (en) * 2008-08-28 2011-10-04 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US8057244B2 (en) 2008-08-28 2011-11-15 Abbott Diabetes Care Inc. Apparatus for preventing electrical shock in devices
US20100255565A1 (en) * 2008-08-28 2010-10-07 Abbott Diabetes Care Inc. Apparatus for Preventing Electrical Shock in Devices
US20100268053A1 (en) * 2009-04-15 2010-10-21 Abbott Diabetes Care Inc. Method and Device for Detecting USB Cable Connection
US9678298B2 (en) * 2010-01-15 2017-06-13 Afl Telecommunications Llc Cable tie-down bracket
US20120318933A1 (en) * 2010-01-15 2012-12-20 Eddie Kimbrell Cable tie-down bracket
EP2800464A3 (en) * 2010-02-25 2015-11-04 Toshiba TEC Kabushiki Kaisha Information processing terminal and method for preventing an electric shock from the information processing terminal
US8070111B1 (en) * 2010-05-20 2011-12-06 Charles Zeller Electrical cord cleat
US8529285B1 (en) * 2010-12-02 2013-09-10 Crystal Group, Inc. Cable retention clip for rugged applications
US20130109222A1 (en) * 2011-10-28 2013-05-02 Nueteq Technology, Inc. Connector retaining device
CN103547100A (en) * 2012-07-09 2014-01-29 建碁股份有限公司 Electronic device and wire fixing mechanism thereof
US20140009876A1 (en) * 2012-07-09 2014-01-09 Aopen Inc. Electronic device and wire fixing mechanism thereof
US20140242830A1 (en) * 2013-02-27 2014-08-28 Nuk Usa Llc Child-resistant plug
US9197018B2 (en) * 2013-02-27 2015-11-24 Nuk Usa Llc Child-resistant plug
GB2510923A (en) * 2013-03-08 2014-08-20 James Michael Savage Semi-permanent alarm system
GB2510923B (en) * 2013-03-08 2015-01-07 James Michael Savage Semi-permanent alarm system
US9147973B1 (en) * 2013-09-11 2015-09-29 Michael W. Madison Enclosure for wall charger
US9859655B2 (en) * 2014-02-14 2018-01-02 Boss Controls, Llc Smart plug system and method
US9392869B2 (en) * 2014-05-09 2016-07-19 Norman R. Byrne Clamp for surface-mounted devices
US20160064850A1 (en) * 2014-08-27 2016-03-03 Robert John Draper, JR. Apparatus for covering electrical plugs
USD793209S1 (en) * 2016-03-22 2017-08-01 Tower Manufacturing Corp Power cord retainer

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