US3781761A - Harwood retainer - Google Patents

Harwood retainer Download PDF

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Publication number
US3781761A
US3781761A US3781761DA US3781761A US 3781761 A US3781761 A US 3781761A US 3781761D A US3781761D A US 3781761DA US 3781761 A US3781761 A US 3781761A
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United States
Prior art keywords
apertures
retainer
strip
edge
harwood
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Expired - Lifetime
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C Harwood
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C Harwood
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Publication of US3781761A publication Critical patent/US3781761A/en
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; 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
    • H01R13/6392Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap for extension cord

Abstract

A retainer for preventing accidental pulling apart of a plug and socket connecting the ends of electrical conductors comprising a strip of flexible material with spaced apertures and openings to the edge of the strip from each aperture.

Description

United States Patent 1 [111 3,781,761

Harwood 1 Dec. 25, 1973 HARWOOD RETAINER 2,461,427 2 1949 Kneebone 339 75 P 6] Inventor: C n ng E. arwood, 145 2,778,582 1/1957 Arthur 174/135 Frederick St, Torrin m C FOREIGN PATENTS OR APPLICATIONS Filed: Mar. 27, Great Britain [21] Appl. No.: 238,066 Primary Examiner-Joseph 1-1. McGlynn AttorneyFrank S. Troidl et a].

[52] US. Cl 339/75 P, 174/135 51 rm. Cl H0lr 13/54 [571 ABSTRACT [58] Field of Search 339/75 P, 103, 1 19 C, A retainer for preventing accidental pulling apart of a 339/147 C; 174/135 plug and socket connecting the ends of electrical conductors comprising a strip of flexible material with [56] References Cited spaced apertures and openings to the edge of the strip UNITED STATES PATENTS from each aperture- 2,204,939 6/1940 L ons 339/147 C 1 Claim, 3 Drawing Figures 1 HARWOOD RETAINER The present invention relates to connectors for electrical conductors, and more particularly to an accessory for use with the otherwise ordinary connector comprising a plug and socket in the form of a retainer for preventing accidential disconnection of the two parts of the connector. Domestic and industrial equipment are frequently connected to the source of electricity by extension cords. Accidential disconnection can result in inconvenience at best or danger at the worst. Most restraining devices are unnecessarily complicated and expensive. My invention employs a simple strip of insulating material with apertures which provide strain release by absorbing tension. By simplicity of use and manufacture it provides safety economically.

The features and advantages of the invention will become apparent from the following description and drawings in which FIG. 1 is a plan view of the retainer;

FIG. 2 is an elevational view; and

FIG. 3 is a plan view of another embodiment of the invention. Like parts throughout the various view are referred to by like numbers.

Referring to the drawings and particularly to FIG. 1, my new retainer is seen to comprise a strip with apertures 12 through which an electrical conductor 14 can be interwoven. Generally, the cnductor has a socket 16 or plug 18 at the ends so that it could not be woven through the apertures 12. For convenience, passageways 20 have been included to communicate .between the apertures and the edge of the strip 22. These passages have a lesser dimension than the diameter of the apertures 12 so that the cord 14 will be restrained from slipping out of the aperture. In FIG. 2, it can be seen that tension applied to the free ends of the cord 24 and 26 will be absorbed by the retainer before it is transmitted to the socket and plug. FIG. 3 illustrates an alternative embodiment in which apertures are staggered on alternate sides of the strip.

In operation, a plug is held against the retainer while the electrical cord is slipped through the opening in the edge into at least two apertures. The mating socket is connected to the plug and its cord is similarly interwoven through at least two apertures in the opposite direction. Tension on a conductor will be absorbed by a slight flexure of the retainer between the apertures. Transverse disengagement is prevented by the obstruction of the aperture wall. Heavy duty or less flexible conductors can be accommodated by interweaving them in alternate apertures as illustrated in FIG. 3 thereby reducing the sharpness of bend required to insert the cord in the retainer. The embodiment of FIG.

3 also permits the connection of two cords on each reinsulating material having a plurality of spaced apertures of predetermined diameter, and passages having a width smaller than the predetermined diameter of the apertures communicating between said apertures and an edge of the strip of flexible insulating material, and interposed apertures with passages communicating to a different edge of the strip.

Claims (1)

1. A retainer for preventing accidental disconnection of electrical connectors comprising a strip of flexible insulating material having a plurality of spaced apertures of predetermined diameter, and passages having a width smaller than the predetermined diameter of the apertures communicating between said apertures and an edge of the strip of flexible insulating material, and interposed apertures with passages communicating to a different edge of the strip.
US3781761D 1972-03-27 1972-03-27 Harwood retainer Expired - Lifetime US3781761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US23806672A true 1972-03-27 1972-03-27

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US3781761A true US3781761A (en) 1973-12-25

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US3781761D Expired - Lifetime US3781761A (en) 1972-03-27 1972-03-27 Harwood retainer

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Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922055A (en) * 1974-10-25 1975-11-25 Raymond Lee Organization Inc Electrical device
WO1983003173A1 (en) * 1982-03-09 1983-09-15 Karel Slais Core former
US4504106A (en) * 1983-05-31 1985-03-12 Max Fechter Electrical cord securing apparatus
US4610494A (en) * 1984-11-23 1986-09-09 Schauber Paul A Flexible security loop
US4773874A (en) * 1987-08-26 1988-09-27 Kopeski Jr Michael J Power cord clip
US5037324A (en) * 1990-08-02 1991-08-06 Scheffey Sr Donald G Plug and socket retainer
US5179044A (en) * 1991-11-27 1993-01-12 Muromachi Paul N Securing device for male plug/female socket connectors
US5211573A (en) * 1992-01-02 1993-05-18 Cross Andrew L Electrical cord coupling
US5336106A (en) * 1992-12-22 1994-08-09 Osten Frederick F Cord connectors
US5423693A (en) * 1994-05-13 1995-06-13 Light; Jack W. Electrical cord, plug and receptacle retainer and line retainer
US5514004A (en) * 1994-11-17 1996-05-07 Swanson; Carl E. Electrical cable apparatus
US5573420A (en) * 1994-12-20 1996-11-12 Grosswendt; Patrick J. Electrical cord and electrical plug securer
US5582524A (en) * 1995-06-14 1996-12-10 Woods Industries, Inc. Cord lock
US5593312A (en) * 1995-06-07 1997-01-14 Waxing Corporation Of America, Inc. Electrical cord lock
US5628646A (en) * 1995-06-07 1997-05-13 Voss; James H. Electrical cord plug retaining device
US5695356A (en) * 1996-10-02 1997-12-09 Swanson; Carl E. Electrical cable apparatus
US6012940A (en) * 1998-02-20 2000-01-11 Wheeler; Michael Extension cord retaining device
US6176729B1 (en) 2000-05-30 2001-01-23 Harold R. Myers Cord-to-cord restraining device
US6336691B1 (en) 1999-05-05 2002-01-08 Plug-In Storage Systems, Inc. Storage cabinet for electronic devices
US6485324B1 (en) * 2001-09-27 2002-11-26 General Electric Company Adjustable electrical cord strain relief apparatus
US20050075003A1 (en) * 2003-07-21 2005-04-07 Hartrich Michael Mclaughlin Power cord connection and strain relief device
US20050204594A1 (en) * 2004-03-17 2005-09-22 Savagian Michael D Clip-on wire identification markers
US7081004B1 (en) 2004-03-18 2006-07-25 Michael Puzio Bend radius friction lock system
US7195511B1 (en) * 2006-01-17 2007-03-27 Harris Corporation Cable strain relief
US7234958B1 (en) * 2006-04-27 2007-06-26 Ncr Corporation Cable retention apparatus
US20090179119A1 (en) * 2008-01-16 2009-07-16 Dell Products L.P. Cable Management System
US20100022106A1 (en) * 2007-09-04 2010-01-28 Dominic Kan Nam Lee Extension Cord Lock and In Line Tap
US20100159733A1 (en) * 2007-09-04 2010-06-24 Dominic Kan Nam Lee Extension cord lock and in line tap
USD639684S1 (en) 2010-04-09 2011-06-14 Linovation Corp. (Ohio Corp.) Mason's guide line holders or similar articles
USD639683S1 (en) 2010-04-09 2011-06-14 Linovation Corp. (Ohio Corp.) Mason's guide line holders or similar articles
US8082665B2 (en) 2010-04-06 2011-12-27 Stephen Edward Zimmerman Apparatus and method securely connecting mating ends of multiple power cords
US8261460B2 (en) 2010-04-09 2012-09-11 Linovation Corp. Line holders for masonry work and the like
WO2013076469A3 (en) * 2011-11-24 2014-03-13 Gary Widdows Apparatus for supporting electrical cables
US9077111B2 (en) 2012-08-03 2015-07-07 Synapsense Corporation Plug retention apparatus
US9698529B1 (en) * 2013-02-28 2017-07-04 Amazon Technologies, Inc. Cable holder for system serviceabilty

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204939A (en) * 1939-07-25 1940-06-18 Carleton R Lyons Combination electrical cord reel and outlet plug
US2461427A (en) * 1946-03-09 1949-02-08 Kneebone Lincoln Tension absorber
US2778582A (en) * 1954-01-05 1957-01-22 Arthur Evan Meirion Means for holding electric cable in a coiled condition
GB884297A (en) * 1957-12-06 1961-12-13 British Insulated Callenders Improvements in or relating to electric cable clips

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204939A (en) * 1939-07-25 1940-06-18 Carleton R Lyons Combination electrical cord reel and outlet plug
US2461427A (en) * 1946-03-09 1949-02-08 Kneebone Lincoln Tension absorber
US2778582A (en) * 1954-01-05 1957-01-22 Arthur Evan Meirion Means for holding electric cable in a coiled condition
GB884297A (en) * 1957-12-06 1961-12-13 British Insulated Callenders Improvements in or relating to electric cable clips

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3922055A (en) * 1974-10-25 1975-11-25 Raymond Lee Organization Inc Electrical device
WO1983003173A1 (en) * 1982-03-09 1983-09-15 Karel Slais Core former
US4504106A (en) * 1983-05-31 1985-03-12 Max Fechter Electrical cord securing apparatus
US4610494A (en) * 1984-11-23 1986-09-09 Schauber Paul A Flexible security loop
US4773874A (en) * 1987-08-26 1988-09-27 Kopeski Jr Michael J Power cord clip
US5037324A (en) * 1990-08-02 1991-08-06 Scheffey Sr Donald G Plug and socket retainer
US5179044A (en) * 1991-11-27 1993-01-12 Muromachi Paul N Securing device for male plug/female socket connectors
US5211573A (en) * 1992-01-02 1993-05-18 Cross Andrew L Electrical cord coupling
US5336106A (en) * 1992-12-22 1994-08-09 Osten Frederick F Cord connectors
US5423693A (en) * 1994-05-13 1995-06-13 Light; Jack W. Electrical cord, plug and receptacle retainer and line retainer
US5514004A (en) * 1994-11-17 1996-05-07 Swanson; Carl E. Electrical cable apparatus
US5573420A (en) * 1994-12-20 1996-11-12 Grosswendt; Patrick J. Electrical cord and electrical plug securer
US5593312A (en) * 1995-06-07 1997-01-14 Waxing Corporation Of America, Inc. Electrical cord lock
US5628646A (en) * 1995-06-07 1997-05-13 Voss; James H. Electrical cord plug retaining device
US5582524A (en) * 1995-06-14 1996-12-10 Woods Industries, Inc. Cord lock
US5695356A (en) * 1996-10-02 1997-12-09 Swanson; Carl E. Electrical cable apparatus
US6012940A (en) * 1998-02-20 2000-01-11 Wheeler; Michael Extension cord retaining device
US6336691B1 (en) 1999-05-05 2002-01-08 Plug-In Storage Systems, Inc. Storage cabinet for electronic devices
US6176729B1 (en) 2000-05-30 2001-01-23 Harold R. Myers Cord-to-cord restraining device
US6485324B1 (en) * 2001-09-27 2002-11-26 General Electric Company Adjustable electrical cord strain relief apparatus
US20050075003A1 (en) * 2003-07-21 2005-04-07 Hartrich Michael Mclaughlin Power cord connection and strain relief device
US7431606B2 (en) * 2003-07-21 2008-10-07 Michael Hartrich Power cord connection and strain relief device
US7073282B2 (en) * 2004-03-17 2006-07-11 Brady Worldwide Inc. Clip-on wire identification markers
US20050204594A1 (en) * 2004-03-17 2005-09-22 Savagian Michael D Clip-on wire identification markers
US7081004B1 (en) 2004-03-18 2006-07-25 Michael Puzio Bend radius friction lock system
US7195511B1 (en) * 2006-01-17 2007-03-27 Harris Corporation Cable strain relief
US7234958B1 (en) * 2006-04-27 2007-06-26 Ncr Corporation Cable retention apparatus
US20110097923A1 (en) * 2007-09-04 2011-04-28 Multiway Industries (Hk) Ltd. Extension Cord Lock and In Line Tap
US20100022106A1 (en) * 2007-09-04 2010-01-28 Dominic Kan Nam Lee Extension Cord Lock and In Line Tap
US20100159733A1 (en) * 2007-09-04 2010-06-24 Dominic Kan Nam Lee Extension cord lock and in line tap
US7862385B2 (en) 2007-09-04 2011-01-04 Multiway Industries (Hk) Ltd. Extension cord lock and in line tap
US7988494B2 (en) 2007-09-04 2011-08-02 Multiway Industries (Hk) Ltd. Extension cord lock and in line tap
US9022327B2 (en) * 2008-01-16 2015-05-05 Dell Products L.P. Cable management system
US20090179119A1 (en) * 2008-01-16 2009-07-16 Dell Products L.P. Cable Management System
US8082665B2 (en) 2010-04-06 2011-12-27 Stephen Edward Zimmerman Apparatus and method securely connecting mating ends of multiple power cords
USD639683S1 (en) 2010-04-09 2011-06-14 Linovation Corp. (Ohio Corp.) Mason's guide line holders or similar articles
USD639684S1 (en) 2010-04-09 2011-06-14 Linovation Corp. (Ohio Corp.) Mason's guide line holders or similar articles
US8261460B2 (en) 2010-04-09 2012-09-11 Linovation Corp. Line holders for masonry work and the like
WO2013076469A3 (en) * 2011-11-24 2014-03-13 Gary Widdows Apparatus for supporting electrical cables
GB2510536A (en) * 2011-11-24 2014-08-06 Gary Widdows Apparatus for supporting electrical cables
US9077111B2 (en) 2012-08-03 2015-07-07 Synapsense Corporation Plug retention apparatus
US9698529B1 (en) * 2013-02-28 2017-07-04 Amazon Technologies, Inc. Cable holder for system serviceabilty

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