US3737835A - Self-ejecting line plug - Google Patents
Self-ejecting line plug Download PDFInfo
- Publication number
- US3737835A US3737835A US00164681A US3737835DA US3737835A US 3737835 A US3737835 A US 3737835A US 00164681 A US00164681 A US 00164681A US 3737835D A US3737835D A US 3737835DA US 3737835 A US3737835 A US 3737835A
- Authority
- US
- United States
- Prior art keywords
- plug
- ejection pin
- trigger
- trigger mechanism
- 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
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
- H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
- H01R13/635—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only by mechanical pressure, e.g. spring force
Definitions
- ABSTRACT A plug is provided for insertion into an ordinary wall outlet and contains a mechanism for effecting selfejection when the line cord is pulled laterally with respect to the plug.
- a line cord is attached to the plug and supported on a trigger member disposed to pivot about a vertical axis within the plug.
- the trigger member is normally biased to a central position by means of laterally disposed, oppositely acting compression springs bearing against a forwardly directed trigger arm.
- An ejecting member is biased in a forward direction to assume a normal attitude parallel to the plug prongs and extending slightly forwardly beyond the ends thereof.
- the ejecting member When the prongs are inserted into the wall socket, the ejecting member is pushed rearwardly and is cocked beneath a catch portion of the trigger arm. when sufficient lateral force is exerted on the cord to pull the trigger arm to either side a predetermined minimum distance, the trigger arm releases the ejecting member which springs forward under the influence of its compression spring to forceably eject the plug which may then be safely retrieved by manually pulling the line toward the operator.
- This invention relates to electrical plugs and, more particularly, to an electrical plug with built in facility for self-ejection in response to lateral translation of the line which it terminates.
- Appliances such as vacuum cleaners
- such method of withdrawing the plug from a socket often results in bent and damaged prongs and, more importantly, may result in damage to the electrical conductors within the cord often rendering them permanently or intermittently open.
- lt is another object of our invention to provide such a plug in which the ejection mechanism is automatically set when the plug is inserted into the socket.
- FIG. I is a cutaway view from the top illustrating a plug incorporating the features of our present invention.
- FIG. 2 is a partially cutaway side view of the plug of FIG. 1 illustrating the trip and ejection mechanism in further detail;
- FIG. 3 illustrates a variant embodiment of our inven-' tion consisting of an adaptor plug containing the ejection mechanism and capable of receiving aline cord terminating in a standard plug;
- FIG. 4 is a partially cutaway side view of the adaptor illustrated in FIG. 3.
- the plug includes a housing 1 from'which conductor prongs 2 extend forwardly to mate with a 2 conventional wall outlet socket in the usual manner.
- the plug may optionally include "a standard ground prong 3 or'may be themore usual two prong configuration. Additional prong configurations will occur to those skilled in the art.
- a trigger mechanism 1 is pivotally fixed proximate the rearward end of the plug hous ing 1 by means of cylindrical projections 5 into corresponding apertures 6 molded 'or otherwise provided within the housing cavity.
- the axis of rotation of the trigger mechanism is substantially normal to a plane passing through the ce'nterline of the prongs 3.
- a line cord 7 enters the rearmost portion of the trigger mechanism 4, and the conductors comprising the line cord are split and secured to the prongs 2 and 3 in any approved manner.
- the trigger mechanism 4 includes a forwardly extending trigger arm 8 which terminates at its forward end in a catch portion 9.
- a relatively thin upward projection 10 from the trigger arm 8, generally above the catch portion 9, is biased to a generally central location within the plug housing 1 by oppositely acting compression springs 11 and 12 bearing, respectively, on the upward projection 10 and opposite inner walls of the plug housing 1.
- the trigger mechanism is normally positioned with the trigger arm 8 generally parallel to the prongs 2 and 3.
- a two position ejectionpin 13 is disposed within the plug housing 1 for longitudinal translation between an extended position at which its forward end terminates proximate the forward ends of the prongs 2 and a retracted position in which its forward end terminates proximate the forward end of the plug housing 1.
- a compression spring 14 biases the ejection pin 13 to the fully extended position; however, when the ejection pin 13 is in the fully retracted position, as best shown in FIG. 2, the catch portion 9 engages an enlarged diameter portion 15 of the ejection pin 13 to maintain it in the fully retracted position against the bias of the compression spring 14.
- the plug In operation, the plug is inserted into a wall socket in the usual manner. As the plug is pushed into the socket, the ejectioripin is pushed rearwardly until it is snapped into the fully retracted position in which it is held by the action of the catch portion 9 of the trigger arm 8 upon the shoulder 15 as previously described.
- FIGS. 1 and 2 The embodiment of our invention illustrated in FIGS. 1 and 2 is especially useful for original equipment manufacture or for direct replacement of an existing plug to an appliance orthe like.
- FIGS. 3 and 4 illustrate an adaptor incorporating the principles of our invention for coupling an existing conventional plug to a wall socket to realize the benefits of the invention.
- a plug housing 20 contains a trigger mechanism corresponding'to that described in conjunction with FIGS. land 2 and includes a rearwardly directed trigger mechanism 21 corresponding to the trigger mechanism 4. However, the rearward portion of the trigger mechanism 21 terminates in a female socket 22 into which a standard plug 23 may be fitted. It will be apparent that lateral translation of the cord terminated by the standard plug 23 will cause the trigger mechanism 21 to pivot effecting the release of the ejection pin within the plug housing in the same manner previously described in conjunction with the configuration of FIGS. 1 and 2.
- An electrical plug adapted to couple an electrical cord to an electrical socket comprising:
- an ejection pin having a forward end and a rearward end, said ejection pin adapted for longitudinal travel generally parallel to said prongs, said ejection pin having an increased diameter shoulder portion proximate its rearward end,
- first spring means biasing said ejection pin forwardly to a position at which its forward end terminates proximate the forward ends of said prongs
- a trigger mechanism pivotally fixed within said housing for limited rotation about an axis normal to a plane passing through the centerlines of said prongs, said trigger mechanism including a forwardly directed trigger arm terminating in a catch portion and an upwardly directed projection, said catch portion adapted to engage said shoulder portion of said ejection pin to hold said ejection pin in a retracted position at which its forward end terminates proximate the forward end of said housing,
- second spring means biasing said trigger mechanism to a normal position at which said trigger arm is aligned with said ejection pin, said second spring means comprising second and third compression springs bearing against, respectively, opposite sides of said upwardly directed projection and opposite sides of the inside surface of said plug housing, and
- An electrical plug according to claim 1 which further includes a female plug fixed to the rearward portion of said trigger mechanism for receiving a standard electrical plug.
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
Description
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16468171A | 1971-07-21 | 1971-07-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3737835A true US3737835A (en) | 1973-06-05 |
Family
ID=22595587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00164681A Expired - Lifetime US3737835A (en) | 1971-07-21 | 1971-07-21 | Self-ejecting line plug |
Country Status (1)
Country | Link |
---|---|
US (1) | US3737835A (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3922600A (en) * | 1974-01-02 | 1975-11-25 | Denes Roveti | Electrical receptacle tester for testing the mechanical and electrical characteristics of electrical service receptacles |
US3936123A (en) * | 1974-10-23 | 1976-02-03 | Gossett Willie P | Electrical plug ejecting apparatus |
USD242720S (en) * | 1975-06-04 | 1976-12-14 | Consolidated Foods Corporation | Combined electric plug and receptacle therefor |
EP0000787A1 (en) * | 1977-08-10 | 1979-02-21 | Bristol-Myers Company | Electrical connector provided with an ejector for disengaging the connector |
US4750890A (en) * | 1987-06-18 | 1988-06-14 | The J. M. Ney Company | Test socket for an integrated circuit package |
WO2000044069A1 (en) * | 1999-01-19 | 2000-07-27 | Logos More Tech. Ltd., Co. | Electric outlet |
US6165002A (en) * | 1998-12-30 | 2000-12-26 | Garmin Corporation | Electrical connector apparatus |
US6422883B1 (en) * | 1999-10-14 | 2002-07-23 | Piet Leopold Margriet Cools | Trigger activated ejecting system for electrical plugs |
US6571564B2 (en) | 2001-10-23 | 2003-06-03 | Shashank Upadhye | Timed container warmer and cooler |
WO2005081367A1 (en) * | 2004-02-24 | 2005-09-01 | Miele & Cie. Kg | Electric plug comprising a plug housing and at least two integrated plug-in contacts with an ejection mechanism |
US20140342590A1 (en) * | 2013-05-14 | 2014-11-20 | Kuwait University | Electrical outlet safety device |
US20170162982A1 (en) * | 2014-12-25 | 2017-06-08 | Xiaomi Inc. | Card holder |
US20170194743A1 (en) * | 2015-07-31 | 2017-07-06 | Dong San Electronics Co., Ltd. | Electric plug |
US10161806B2 (en) | 2015-09-10 | 2018-12-25 | Firesmart Technology, Inc. | Outlet heat detector |
US10700465B2 (en) | 2018-09-15 | 2020-06-30 | Samuel Deskin | Electrical plug shock protection device |
US11196218B1 (en) * | 2020-07-15 | 2021-12-07 | Nextronics Engineering Corp. | Connector with direct locking and rotational pre-ejection function |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2394618A (en) * | 1944-09-05 | 1946-02-12 | Harry A F Kunasch | Electrical connection |
US2571046A (en) * | 1949-11-21 | 1951-10-09 | John J Maisey | Self-ejecting electric plug |
US2696594A (en) * | 1953-08-27 | 1954-12-07 | Harrington Pete | Electric plug having a conductor operated ejector |
US2952003A (en) * | 1955-10-26 | 1960-09-06 | Pomona Electronics Co Inc | Coupler |
US3201617A (en) * | 1962-04-20 | 1965-08-17 | Westinghouse Electric Corp | Connector including a rectifier for voltage reduction |
US3439308A (en) * | 1966-12-12 | 1969-04-15 | Willson C Swartout | Male/female electrical adaptor |
US3575684A (en) * | 1969-08-22 | 1971-04-20 | Charles S Mcintyre | Electrical safety plug assembly |
-
1971
- 1971-07-21 US US00164681A patent/US3737835A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2394618A (en) * | 1944-09-05 | 1946-02-12 | Harry A F Kunasch | Electrical connection |
US2571046A (en) * | 1949-11-21 | 1951-10-09 | John J Maisey | Self-ejecting electric plug |
US2696594A (en) * | 1953-08-27 | 1954-12-07 | Harrington Pete | Electric plug having a conductor operated ejector |
US2952003A (en) * | 1955-10-26 | 1960-09-06 | Pomona Electronics Co Inc | Coupler |
US3201617A (en) * | 1962-04-20 | 1965-08-17 | Westinghouse Electric Corp | Connector including a rectifier for voltage reduction |
US3439308A (en) * | 1966-12-12 | 1969-04-15 | Willson C Swartout | Male/female electrical adaptor |
US3575684A (en) * | 1969-08-22 | 1971-04-20 | Charles S Mcintyre | Electrical safety plug assembly |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3922600A (en) * | 1974-01-02 | 1975-11-25 | Denes Roveti | Electrical receptacle tester for testing the mechanical and electrical characteristics of electrical service receptacles |
US3936123A (en) * | 1974-10-23 | 1976-02-03 | Gossett Willie P | Electrical plug ejecting apparatus |
USD242720S (en) * | 1975-06-04 | 1976-12-14 | Consolidated Foods Corporation | Combined electric plug and receptacle therefor |
EP0000787A1 (en) * | 1977-08-10 | 1979-02-21 | Bristol-Myers Company | Electrical connector provided with an ejector for disengaging the connector |
US4750890A (en) * | 1987-06-18 | 1988-06-14 | The J. M. Ney Company | Test socket for an integrated circuit package |
US6165002A (en) * | 1998-12-30 | 2000-12-26 | Garmin Corporation | Electrical connector apparatus |
WO2000044069A1 (en) * | 1999-01-19 | 2000-07-27 | Logos More Tech. Ltd., Co. | Electric outlet |
US6422883B1 (en) * | 1999-10-14 | 2002-07-23 | Piet Leopold Margriet Cools | Trigger activated ejecting system for electrical plugs |
US7287386B2 (en) | 2001-10-23 | 2007-10-30 | Snuddles, Llc | Container cooler and warmer |
US6571564B2 (en) | 2001-10-23 | 2003-06-03 | Shashank Upadhye | Timed container warmer and cooler |
US20040194470A1 (en) * | 2001-10-23 | 2004-10-07 | Upadhye Shashank S. | Container cooler and warmer |
WO2005081367A1 (en) * | 2004-02-24 | 2005-09-01 | Miele & Cie. Kg | Electric plug comprising a plug housing and at least two integrated plug-in contacts with an ejection mechanism |
DE102004009403B3 (en) * | 2004-02-24 | 2005-11-10 | Miele & Cie. Kg | Electrical plug with a plug housing and at least two integrated plug contacts with ejection device |
US7344393B2 (en) | 2004-02-24 | 2008-03-18 | Miele & Cie. Kg | Electric plug comprising a plug housing and at least two integrated plug-in contacts with an ejection mechanism |
US20140342590A1 (en) * | 2013-05-14 | 2014-11-20 | Kuwait University | Electrical outlet safety device |
US8956168B2 (en) * | 2013-05-14 | 2015-02-17 | Kuwait University | Electrical outlet safety device |
US20170162982A1 (en) * | 2014-12-25 | 2017-06-08 | Xiaomi Inc. | Card holder |
US9941632B2 (en) * | 2014-12-25 | 2018-04-10 | Xiaomi Inc. | Card holder |
US20170194743A1 (en) * | 2015-07-31 | 2017-07-06 | Dong San Electronics Co., Ltd. | Electric plug |
US9887493B2 (en) * | 2015-07-31 | 2018-02-06 | Dong San Electronics Co., Ltd. | Electric plug |
US10161806B2 (en) | 2015-09-10 | 2018-12-25 | Firesmart Technology, Inc. | Outlet heat detector |
US10700465B2 (en) | 2018-09-15 | 2020-06-30 | Samuel Deskin | Electrical plug shock protection device |
US11196218B1 (en) * | 2020-07-15 | 2021-12-07 | Nextronics Engineering Corp. | Connector with direct locking and rotational pre-ejection function |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CLEMENT, DOREENE K. 3433 NORTH 47TH PL., PHOENIX, Free format text: ASSIGNS TO EACH ASSIGNEE THE AMOUNT SPECIFIED BY THEIR RESPECTIVE NAMES;ASSIGNOR:JONES, ANTHONY O.,PERSONAL REPRESENTATIVE OF THE ESTATE OF CLYDE HOWARD CLEMENT, DEC D;REEL/FRAME:004128/0973 Effective date: 19811104 Owner name: CLEMENT, JOSEPHINE MARIE 8439 N. 13TH PLACE, PHOEN Free format text: ASSIGNS TO EACH ASSIGNEE THE AMOUNT SPECIFIED BY THEIR RESPECTIVE NAMES;ASSIGNOR:JONES, ANTHONY O.,PERSONAL REPRESENTATIVE OF THE ESTATE OF CLYDE HOWARD CLEMENT, DEC D;REEL/FRAME:004128/0973 Effective date: 19811104 Owner name: CLEMENT, CLINTON H. 2809 HENNEPIN AVE. SO., MINNEA Free format text: ASSIGNS TO EACH ASSIGNEE THE AMOUNT SPECIFIED BY THEIR RESPECTIVE NAMES;ASSIGNOR:JONES, ANTHONY O.,PERSONAL REPRESENTATIVE OF THE ESTATE OF CLYDE HOWARD CLEMENT, DEC D;REEL/FRAME:004128/0973 Effective date: 19811104 Owner name: SIMMONS, DENISE, BOX 373, SALEM, UTAH 84653, (12 1 Free format text: ASSIGNS TO EACH ASSIGNEE THE AMOUNT SPECIFIED BY THEIR RESPECTIVE NAMES;ASSIGNOR:JONES, ANTHONY O.,PERSONAL REPRESENTATIVE OF THE ESTATE OF CLYDE HOWARD CLEMENT, DEC D;REEL/FRAME:004128/0973 Effective date: 19811104 Owner name: CLEMENT, ANN L. 8439 NO. 13TH PL., PHOENIX, AZ. 85 Free format text: ASSIGNS TO EACH ASSIGNEE THE AMOUNT SPECIFIED BY THEIR RESPECTIVE NAMES;ASSIGNOR:JONES, ANTHONY O.,PERSONAL REPRESENTATIVE OF THE ESTATE OF CLYDE HOWARD CLEMENT, DEC D;REEL/FRAME:004128/0973 Effective date: 19811104 |