US1477527A - Contact spring - Google Patents

Contact spring Download PDF

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Publication number
US1477527A
US1477527A US63351323A US1477527A US 1477527 A US1477527 A US 1477527A US 63351323 A US63351323 A US 63351323A US 1477527 A US1477527 A US 1477527A
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Grant
Patent type
Prior art keywords
contact
springs
contact spring
spring
faces
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Expired - Lifetime
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Inventor
Raettig Bruno
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Raettig Bruno
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/12Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42Knife-and-clip contacts
    • 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
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • H01R13/115U-shaped sockets having inwardly bent legs, e.g. spade type
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact and means for effecting or maintaining such contact
    • H01R4/28Clamped connections, spring connections
    • H01R4/30Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36Conductive members located under tip of screw

Description

Dec, 11 1923 31,477,527

B. RAETTIG CONTACT SPRING Filed April 20, 1923 Fig.1.

iiiiij f Patented Dec. Ill, 1923.

UNHD STTS Lei-W 52? BRUNO RAETTIG, OF HOFFNUNGSTHAL, GERMANY.

CONTACT SPRING.

Application filed April 20, 1923. Serial No. 633,513.-

T 0 all whom it may concern:

Be it known that I, BRUNO RAETTIG, a citizen of the German Reich, residing at Hotfnungsthal. Germany. have. invented certain new and useful Improvements in Contact Springs (for which an ap'pli "at-ion for patent has been filed in Germany on the March 9th. 1922). of which the following is a specification.

This invention relates to a contact spring of the type used for electric apparatus, specially for electric switch apparatus;

The contact springs commonly used.-especial'y for higher intensities of current. present the inconvenience that the contact faces of the contact spring are in contact" only with a small part of their total surface with the counter-contact faces. for instance the contact faces of the switch-knives. whereby detrimental heating frequently results. This poor contact is further increased by the spark produced at the interruption. said spark producing burnt spots on the contact surfaces. Under certain conditions, the molten drops produced at the burnt points push the contact springs away from one another and prevent a perfect contact with the counter-contact faces.

To avoid these inconveniences it has been proposed to use spark drawing devices in connection with contact springs which however complicates the construction of the contact springs. said spark-drawing devices moreover not being-adapted to assist in the transmission of current.

According to this invention the incon veniences mentioned are avoided by the arrangement that the contact springs are made of several springs which with regard to the counter-contact part are situated the one behind the other. It. has already become known to subdivide contact springs so that, at higher intensities of current, the springs are subdivided by milled sits into several parts situated the one at the side of the other, each part being independently resilientf According to this invention the subdivision of the springs in transverse direction may be utilized also. I

The springs of the several layers are pref- I erably of different lengths so that the'contact faces of the individual perposed.

The subdivision according to the invention presents the advantage that even at high intensities of current comparatively springs are suthin blades of sheet metal may be used, the accurate working and fashioning of thin sheet metal being much easier than that of thick. sheet metal. Another advantage is that each of the successive springs possesses individuai elasticity and comes in contact with the counter contact. By this arrangement a much better contact is ensured, since, if one pair of contact faces'should faiT, only a very small part of the total contact surface 'is inoperative whilst with contact springs made in one piece the entire contact surface becomes inactive if the contact is poor. The outer contact spring serves in this arrangement as a spark-drawing device. Four embodiments of the invention are shown by way of example onthe accompanying drawing. the contact springs shown being of the preferred shape produced by the bending of two arms in different shapes.

Each of the Figures 1 to it shows in front elevation one embodiment of the invention. Figs. 1 to l are respective side elevations of these embodiments.

According to Fig. l the contact spring consists of two contact springs a, Z) of which the outer one, a, has short inwardly bent arms, the inner one, I), havmg longer inwardly bent arms. These bent arms serve as contact surfaces. The contact springs a and b are fixed by soldering or by means of screws in the well known manner in a slitted connecting piece a. The line wires are clamped in a bore 7 of the connecting piece 0 by means of a wire terminal screw d. The connection may however be effected in any other convenient manner.

In the form of construction shown in Fig. 2 three single springs a, b, 72 are arranged the one behind the other. Each contact spring is 'further subdivided in transverse direction bv meansof slits or in such a manner that iii the slit of a connecting piece 0 several contact springs are fixed the one at the side of the other in transverse direction.

Fig. 3 shows an arrangement of three contact springs a 6 ,9 the one behind the other which differ from the contact sprin s shown in Figs. 1 and 2' only as regards the shape of the contact faces.

Fig. at shows an arrangement of-several contact springs (1 b k similar to Figs. 1 to 3. The individual contact springs are however made from comparatlvely thin sheet metal and joggled at several points in longitudinal direction. This arrangement ensures an especially soft but good elasticity and contactgi'ving; The shape of each in dividual spring maybe altered otherwise in any convenient, manner. 1

I claim I In a switch if the kind as described, a spring contact comprising nested U-shaped 'members, the arms f said members-being 10' turned inwardly to form opposite series of aligned spaced contact faces, the arms .s'lip porting said faces being independently resilient.

' In testimony, whereof I aflix my signature in presence 0 two witnesses.

' BRUNO RAETTIG. Witnesses: HENRY W. HAAs, G. Ronnscnnn. o

US1477527A 1923-04-03 1923-04-20 Contact spring Expired - Lifetime US1477527A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB910423A GB211366A (en) 1923-04-03 1923-04-03 Improvements in electric contacts
US1477527A US1477527A (en) 1923-04-03 1923-04-20 Contact spring

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH104663A CH104663A (en) 1923-04-03 1923-04-04 Contact spring.
US1477527A US1477527A (en) 1923-04-03 1923-04-20 Contact spring

Publications (1)

Publication Number Publication Date
US1477527A true US1477527A (en) 1923-12-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US1477527A Expired - Lifetime US1477527A (en) 1923-04-03 1923-04-20 Contact spring

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Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425608A (en) * 1944-05-23 1947-08-12 Gen Railway Signal Co Plug coupling apparatus
US2779844A (en) * 1955-06-02 1957-01-29 Mcgraw Electric Co Equalized multiple high pressure contact
US2917612A (en) * 1957-11-25 1959-12-15 Ite Circuit Breaker Ltd Plug in disconnects
US3648222A (en) * 1970-03-16 1972-03-07 Bunker Ramo Electrical connector having laminated contact element
US3691511A (en) * 1970-10-05 1972-09-12 Bunker Ramo Plug connection contact with high security against burning off
US4795379A (en) * 1986-08-27 1989-01-03 Amp Incorporated Four leaf receptacle contact
WO1997045850A1 (en) * 1996-05-24 1997-12-04 Asea Brown Boveri Ab Electric switching device
US20020142663A1 (en) * 2001-03-07 2002-10-03 Tetsuo Takeyama Contact terminal and card connector having the same
US6604967B2 (en) * 1998-09-15 2003-08-12 Tyco Electronics Corporation Socket assembly and female connector for use therewith
US6607405B2 (en) 2000-04-27 2003-08-19 Yamaichi Electronics Co., Ltd. Multi-card card connector for multi-type cards
US6645012B2 (en) 2000-08-08 2003-11-11 Yamaichi Electrics Co., Ltd. Card edge connector comprising a housing and a plurality of contacts
US6652322B2 (en) * 2001-02-09 2003-11-25 Yamaichi Electronics Co., Ltd. Card-edge connector
US6685512B2 (en) 2001-01-19 2004-02-03 Yamaichi Electronics Co., Ltd. Card connector
US7182645B2 (en) 2004-01-23 2007-02-27 Yamaichi Electronics Co., Ltd. Card connector for an electronic device and a contact used therein
US20070224887A1 (en) * 2006-03-27 2007-09-27 Hon Hai Precision Ind. Co., Ltd. Land grid array socket
US7402064B2 (en) 2003-12-31 2008-07-22 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US7425145B2 (en) 2006-05-26 2008-09-16 Fci Americas Technology, Inc. Connectors and contacts for transmitting electrical power
US7438598B1 (en) 1999-11-05 2008-10-21 Yamaichi Electronics Co., Ltd. Card connector
US7458839B2 (en) 2006-02-21 2008-12-02 Fci Americas Technology, Inc. Electrical connectors having power contacts with alignment and/or restraining features
US7476108B2 (en) 2004-12-22 2009-01-13 Fci Americas Technology, Inc. Electrical power connectors with cooling features
US7541135B2 (en) 2005-04-05 2009-06-02 Fci Americas Technology, Inc. Power contact having conductive plates with curved portions contact beams and board tails
US7641500B2 (en) 2007-04-04 2010-01-05 Fci Americas Technology, Inc. Power cable connector system
USD608293S1 (en) 2009-01-16 2010-01-19 Fci Americas Technology, Inc. Vertical electrical connector
US20100029102A1 (en) * 2008-08-04 2010-02-04 Hon Hai Precision Industry Co., Ltd. Electrical connector having reinforced contacts arrangement
USD610548S1 (en) 2009-01-16 2010-02-23 Fci Americas Technology, Inc. Right-angle electrical connector
US7726982B2 (en) 2006-06-15 2010-06-01 Fci Americas Technology, Inc. Electrical connectors with air-circulation features
USD618180S1 (en) 2009-04-03 2010-06-22 Fci Americas Technology, Inc. Asymmetrical electrical connector
USD618181S1 (en) 2009-04-03 2010-06-22 Fci Americas Technology, Inc. Asymmetrical electrical connector
USD619099S1 (en) 2009-01-30 2010-07-06 Fci Americas Technology, Inc. Electrical connector
US7749009B2 (en) 2005-01-31 2010-07-06 Fci Americas Technology, Inc. Surface-mount connector
US7762857B2 (en) 2007-10-01 2010-07-27 Fci Americas Technology, Inc. Power connectors with contact-retention features
US7905731B2 (en) 2007-05-21 2011-03-15 Fci Americas Technology, Inc. Electrical connector with stress-distribution features
US7914350B1 (en) 2010-04-13 2011-03-29 Cadwell Labs Apparatus, system, and method for creating an electrical connection to a tool
USD640637S1 (en) 2009-01-16 2011-06-28 Fci Americas Technology Llc Vertical electrical connector
USD641709S1 (en) 2009-01-16 2011-07-19 Fci Americas Technology Llc Vertical electrical connector
US8062051B2 (en) 2008-07-29 2011-11-22 Fci Americas Technology Llc Electrical communication system having latching and strain relief features
US20120083171A1 (en) * 2009-08-17 2012-04-05 Byrne Norman R Solid wire terminal
USD664096S1 (en) 2009-01-16 2012-07-24 Fci Americas Technology Llc Vertical electrical connector
US8323049B2 (en) 2009-01-30 2012-12-04 Fci Americas Technology Llc Electrical connector having power contacts
US20130244504A1 (en) * 2012-03-16 2013-09-19 Makita Corporation Terminal structure
CN104143716A (en) * 2013-05-10 2014-11-12 町洋机电(中国)有限公司 Multi-point contact low-impedance pluggable electric connector
USD718253S1 (en) 2012-04-13 2014-11-25 Fci Americas Technology Llc Electrical cable connector
US8905651B2 (en) 2012-01-31 2014-12-09 Fci Dismountable optical coupling device
USD720698S1 (en) 2013-03-15 2015-01-06 Fci Americas Technology Llc Electrical cable connector
US8944831B2 (en) 2012-04-13 2015-02-03 Fci Americas Technology Llc Electrical connector having ribbed ground plate with engagement members
USD727268S1 (en) 2012-04-13 2015-04-21 Fci Americas Technology Llc Vertical electrical connector
USD727852S1 (en) 2012-04-13 2015-04-28 Fci Americas Technology Llc Ground shield for a right angle electrical connector
US9048583B2 (en) 2009-03-19 2015-06-02 Fci Americas Technology Llc Electrical connector having ribbed ground plate
USD733662S1 (en) 2013-01-25 2015-07-07 Fci Americas Technology Llc Connector housing for electrical connector
US20150229058A1 (en) * 2012-09-17 2015-08-13 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Contact element
USD746236S1 (en) 2012-07-11 2015-12-29 Fci Americas Technology Llc Electrical connector housing
US9257778B2 (en) 2012-04-13 2016-02-09 Fci Americas Technology High speed electrical connector
US9543703B2 (en) 2012-07-11 2017-01-10 Fci Americas Technology Llc Electrical connector with reduced stack height
US9711921B2 (en) 2015-02-27 2017-07-18 Norman R. Byrne Electrical contact receptacle for bus bars and blade terminals
US20170324182A1 (en) * 2014-11-28 2017-11-09 Fujitsu Component Limited Connector

Cited By (91)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2425608A (en) * 1944-05-23 1947-08-12 Gen Railway Signal Co Plug coupling apparatus
US2779844A (en) * 1955-06-02 1957-01-29 Mcgraw Electric Co Equalized multiple high pressure contact
US2917612A (en) * 1957-11-25 1959-12-15 Ite Circuit Breaker Ltd Plug in disconnects
US3648222A (en) * 1970-03-16 1972-03-07 Bunker Ramo Electrical connector having laminated contact element
US3691511A (en) * 1970-10-05 1972-09-12 Bunker Ramo Plug connection contact with high security against burning off
US4795379A (en) * 1986-08-27 1989-01-03 Amp Incorporated Four leaf receptacle contact
WO1997045850A1 (en) * 1996-05-24 1997-12-04 Asea Brown Boveri Ab Electric switching device
WO1997045851A1 (en) * 1996-05-24 1997-12-04 Asea Brown Boveri Ab Electric switching device
US6835103B2 (en) 1998-09-15 2004-12-28 Tyco Electronics Corporation Electrical contacts and socket assembly
US6604967B2 (en) * 1998-09-15 2003-08-12 Tyco Electronics Corporation Socket assembly and female connector for use therewith
US7438598B1 (en) 1999-11-05 2008-10-21 Yamaichi Electronics Co., Ltd. Card connector
US6607405B2 (en) 2000-04-27 2003-08-19 Yamaichi Electronics Co., Ltd. Multi-card card connector for multi-type cards
US6645012B2 (en) 2000-08-08 2003-11-11 Yamaichi Electrics Co., Ltd. Card edge connector comprising a housing and a plurality of contacts
US6685512B2 (en) 2001-01-19 2004-02-03 Yamaichi Electronics Co., Ltd. Card connector
US6652322B2 (en) * 2001-02-09 2003-11-25 Yamaichi Electronics Co., Ltd. Card-edge connector
US6793536B2 (en) 2001-03-07 2004-09-21 Yamaichi Electronics Co., Ltd. Contact terminal and card connector having the same
US20020142663A1 (en) * 2001-03-07 2002-10-03 Tetsuo Takeyama Contact terminal and card connector having the same
US8187017B2 (en) 2003-12-31 2012-05-29 Fci Americas Technology Llc Electrical power contacts and connectors comprising same
US7862359B2 (en) 2003-12-31 2011-01-04 Fci Americas Technology Llc Electrical power contacts and connectors comprising same
US7402064B2 (en) 2003-12-31 2008-07-22 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US7775822B2 (en) 2003-12-31 2010-08-17 Fci Americas Technology, Inc. Electrical connectors having power contacts with alignment/or restraining features
US7452249B2 (en) * 2003-12-31 2008-11-18 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US8062046B2 (en) 2003-12-31 2011-11-22 Fci Americas Technology Llc Electrical power contacts and connectors comprising same
US7690937B2 (en) 2003-12-31 2010-04-06 Fci Americas Technology, Inc. Electrical power contacts and connectors comprising same
US7182645B2 (en) 2004-01-23 2007-02-27 Yamaichi Electronics Co., Ltd. Card connector for an electronic device and a contact used therein
US7476108B2 (en) 2004-12-22 2009-01-13 Fci Americas Technology, Inc. Electrical power connectors with cooling features
US7749009B2 (en) 2005-01-31 2010-07-06 Fci Americas Technology, Inc. Surface-mount connector
US7541135B2 (en) 2005-04-05 2009-06-02 Fci Americas Technology, Inc. Power contact having conductive plates with curved portions contact beams and board tails
US7458839B2 (en) 2006-02-21 2008-12-02 Fci Americas Technology, Inc. Electrical connectors having power contacts with alignment and/or restraining features
US20070224887A1 (en) * 2006-03-27 2007-09-27 Hon Hai Precision Ind. Co., Ltd. Land grid array socket
US7467949B2 (en) * 2006-03-27 2008-12-23 Hon Hai Precision Ind. Co., Ltd. Land grid array socket
US7425145B2 (en) 2006-05-26 2008-09-16 Fci Americas Technology, Inc. Connectors and contacts for transmitting electrical power
US7726982B2 (en) 2006-06-15 2010-06-01 Fci Americas Technology, Inc. Electrical connectors with air-circulation features
US7641500B2 (en) 2007-04-04 2010-01-05 Fci Americas Technology, Inc. Power cable connector system
US7905731B2 (en) 2007-05-21 2011-03-15 Fci Americas Technology, Inc. Electrical connector with stress-distribution features
US7762857B2 (en) 2007-10-01 2010-07-27 Fci Americas Technology, Inc. Power connectors with contact-retention features
US8062051B2 (en) 2008-07-29 2011-11-22 Fci Americas Technology Llc Electrical communication system having latching and strain relief features
US20100029102A1 (en) * 2008-08-04 2010-02-04 Hon Hai Precision Industry Co., Ltd. Electrical connector having reinforced contacts arrangement
US7780456B2 (en) * 2008-08-04 2010-08-24 Hon Hai Precision Ind. Co., Ltd. Electrical connector having reinforced contacts arrangement
USD640637S1 (en) 2009-01-16 2011-06-28 Fci Americas Technology Llc Vertical electrical connector
USD610548S1 (en) 2009-01-16 2010-02-23 Fci Americas Technology, Inc. Right-angle electrical connector
USD664096S1 (en) 2009-01-16 2012-07-24 Fci Americas Technology Llc Vertical electrical connector
USD608293S1 (en) 2009-01-16 2010-01-19 Fci Americas Technology, Inc. Vertical electrical connector
USD641709S1 (en) 2009-01-16 2011-07-19 Fci Americas Technology Llc Vertical electrical connector
USD647058S1 (en) 2009-01-16 2011-10-18 Fci Americas Technology Llc Vertical electrical connector
USD660245S1 (en) 2009-01-16 2012-05-22 Fci Americas Technology Llc Vertical electrical connector
USD696199S1 (en) 2009-01-16 2013-12-24 Fci Americas Technology Llc Vertical electrical connector
USD651981S1 (en) 2009-01-16 2012-01-10 Fci Americas Technology Llc Vertical electrical connector
US8323049B2 (en) 2009-01-30 2012-12-04 Fci Americas Technology Llc Electrical connector having power contacts
USD619099S1 (en) 2009-01-30 2010-07-06 Fci Americas Technology, Inc. Electrical connector
US9048583B2 (en) 2009-03-19 2015-06-02 Fci Americas Technology Llc Electrical connector having ribbed ground plate
US9461410B2 (en) 2009-03-19 2016-10-04 Fci Americas Technology Llc Electrical connector having ribbed ground plate
US10096921B2 (en) 2009-03-19 2018-10-09 Fci Usa Llc Electrical connector having ribbed ground plate
USD618181S1 (en) 2009-04-03 2010-06-22 Fci Americas Technology, Inc. Asymmetrical electrical connector
USD618180S1 (en) 2009-04-03 2010-06-22 Fci Americas Technology, Inc. Asymmetrical electrical connector
USD653621S1 (en) 2009-04-03 2012-02-07 Fci Americas Technology Llc Asymmetrical electrical connector
US8616926B2 (en) * 2009-08-17 2013-12-31 Norman R. Byrne Solid wire terminal
US20140113510A1 (en) * 2009-08-17 2014-04-24 Norman R. Byrne Solid wire terminal
US20120083171A1 (en) * 2009-08-17 2012-04-05 Byrne Norman R Solid wire terminal
US8920201B2 (en) * 2009-08-17 2014-12-30 Norman R. Byrne Solid wire terminal
US7914350B1 (en) 2010-04-13 2011-03-29 Cadwell Labs Apparatus, system, and method for creating an electrical connection to a tool
US8905651B2 (en) 2012-01-31 2014-12-09 Fci Dismountable optical coupling device
US20130244504A1 (en) * 2012-03-16 2013-09-19 Makita Corporation Terminal structure
US9112292B2 (en) * 2012-03-16 2015-08-18 Makita Corporation Terminal structure
USD750025S1 (en) 2012-04-13 2016-02-23 Fci Americas Technology Llc Vertical electrical connector
USD727852S1 (en) 2012-04-13 2015-04-28 Fci Americas Technology Llc Ground shield for a right angle electrical connector
USD727268S1 (en) 2012-04-13 2015-04-21 Fci Americas Technology Llc Vertical electrical connector
US8944831B2 (en) 2012-04-13 2015-02-03 Fci Americas Technology Llc Electrical connector having ribbed ground plate with engagement members
USD790471S1 (en) 2012-04-13 2017-06-27 Fci Americas Technology Llc Vertical electrical connector
US9831605B2 (en) 2012-04-13 2017-11-28 Fci Americas Technology Llc High speed electrical connector
USD718253S1 (en) 2012-04-13 2014-11-25 Fci Americas Technology Llc Electrical cable connector
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USD748063S1 (en) 2012-04-13 2016-01-26 Fci Americas Technology Llc Electrical ground shield
US9257778B2 (en) 2012-04-13 2016-02-09 Fci Americas Technology High speed electrical connector
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US9543703B2 (en) 2012-07-11 2017-01-10 Fci Americas Technology Llc Electrical connector with reduced stack height
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US9281598B2 (en) * 2012-09-17 2016-03-08 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Contact element
US20150229058A1 (en) * 2012-09-17 2015-08-13 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Contact element
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CN104143716B (en) * 2013-05-10 2017-06-13 町洋机电(中国)有限公司 Multiple contacts low impedance electrical connector plug
CN104143716A (en) * 2013-05-10 2014-11-12 町洋机电(中国)有限公司 Multi-point contact low-impedance pluggable electric connector
US20170324182A1 (en) * 2014-11-28 2017-11-09 Fujitsu Component Limited Connector
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US9711921B2 (en) 2015-02-27 2017-07-18 Norman R. Byrne Electrical contact receptacle for bus bars and blade terminals

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