US2711524A - Electrical contact - Google Patents

Electrical contact Download PDF

Info

Publication number
US2711524A
US2711524A US313682A US31368252A US2711524A US 2711524 A US2711524 A US 2711524A US 313682 A US313682 A US 313682A US 31368252 A US31368252 A US 31368252A US 2711524 A US2711524 A US 2711524A
Authority
US
United States
Prior art keywords
contact
mortise
dovetail
neck
edges
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
Application number
US313682A
Inventor
Beaver Erick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMERICAN PHENOLIC Corp
Original Assignee
AMERICAN PHENOLIC CORP
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AMERICAN PHENOLIC CORP filed Critical AMERICAN PHENOLIC CORP
Priority to US313682A priority Critical patent/US2711524A/en
Application granted granted Critical
Publication of US2711524A publication Critical patent/US2711524A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC 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
    • H01R13/02Contact members
    • H01R13/10Sockets for co-operation with pins or blades
    • H01R13/11Resilient sockets
    • H01R13/111Resilient sockets co-operating with pins having a circular transverse section

Definitions

  • the neck of the contact is prevented from spreading by interlocking the relatively thin edges of the split sleeve with a unique fastening or joint, which comprises a form of mortise and tenon particularly useful in this specific application, and so designed as to hold the mortise and tenon flush with g each other and thus effectively prevent their disengagement, even when the coacting parts are formed of very thin sheet metal, as in the present disclosure.
  • a unique fastening or joint which comprises a form of mortise and tenon particularly useful in this specific application, and so designed as to hold the mortise and tenon flush with g each other and thus effectively prevent their disengagement, even when the coacting parts are formed of very thin sheet metal, as in the present disclosure.
  • Figure l is an enlarged elevational view of an electrical contact constructed in accordance with this invention.
  • Figures 2, 3 and 4 are detail sectional views taken on the planes of the lines 2-2, 33 and 44, respectively;
  • Figure 5 is an enlarged fragmental sectional view of the forward end of the contact, the view being taken substantially on the plane of the line 55 of Figure 1;
  • Figure 6 is an enlarged fragmental plan view of the blank from which the contact is formed
  • Figure 7 is a greatly enlarged detail plan view of the dovetail joint interconnecting the opposite edges of the contact at the neck portion thereof;
  • Figure 8 is a detail sectional view taken substantially on the plane of the line 8-8 of Figure 7;
  • Figure 9 is a detail sectional view taken substantially on the plane of the line 9-9 of Figure 7.
  • the entire contact is formed of a single sheet metal stamping, cut and formed to provide a tubular forward portion or neck 10 of fixed diameter, behind which a plurality of sheet metal spring fingers 11 are arranged to accomplish a resilient electrical connection with a contact pin inserted through the neck.
  • a mounting portion 12 is provided to secure the contact within the dielectric insert of an electrical connector, and the end of the contact opposite the neck 10 is provided with an open sided solder pocket 13 as is conventional in the art.
  • the mounting portion is inwardly crimped at the points 14 to provide means for anchoring the conmet in the insert of the connector, as well as to close the inside end of the solder pocket.
  • the forward end of the contact is shown in enlarged view in Figure 5, where it will be seen that the metal is cut away along parallel longitudinal slots 15 so as to form three angularly disposed spring contact fingers 16 extending between the mounting portion 12 and the neck portion 10 of the contact.
  • the extreme end of the neck portion 10 may be slightly flared at 17, if desired, and is arranged to receive a round contact pin having a diameter not greater than the diameter D indicated in Figure 5.
  • the spring fingers 16 of the contact are imparted with a permanent set such that they will bearinwardly against such'a contact pin with adequate force to establish a firm electrical contact therewith, but since the neck of the contact limits the size of pin to be inserted, the fingers 16 cannot be flexed to the point of permanent distortion by inserting or attempting to insert an oversize contact pin into the connector. It follows that the resiliency of the fingers cannot be impaired'by normal use.
  • This structure results in a unique interlock which prevents the tenon from slipping out of the mortise even when the metal is so flattened that it is reduced to the thickness of a single sheet as it is forced into final shape by the forming dies employed in manufacturing the contact.
  • the dovetail 21 is of generally trapezoidal form having a straight end 22 parallel with the edge 23, and with angularly divergent side edges 24 and 25.
  • the mortise 26 in the opposite edge 27 of the metal is somewhat more circular in shape, having an inside width IW somewhat less than the outside width OW of the dovetail 21, and with a neck portion N of considerably less width than the width W at the inner end of the dovetail 21.
  • the present invention provides an improved contact, formed of a single split sleeve but having a pin aperture of fixed dimensions which is not subject to spreading, notwithstanding the fact that the neck itself is formed of split sleeve construction. Moreover, this is accomplished without any encircling rings, collars or reinforcements which add to the expense and increase the complications of manufacture.
  • An electrical contact consisting of a single integral metallic sheet in generally tubular form, with a mounting portion, a neck portion, and a plurality of longitudinal slots between the mounting portion and the neck defining a plurality of separate spring fingers angularly disposed with respect to each other and extending longitudinally of the mortise of lesser width than the dovetail, and with at least one of the edges of the dovetail and at least one of the edges of the mortise overlying the other Orr-their opposite surfaces.
  • An electrical contact having a neck comprising a split sleeve with opposite edges secured to each other by a mortise and tenon wherein the tenon consists of a thin metal dovetail integral with and projecting from one edge of the split sleeve, and the mortise consists of an undercut notch in the opposite edge thereof, with a portion of the dovetail of greater width than the mortiseand with a portion of the mortise of lesser width than the dovetail, and with at least one of the edges of the dovetail filid at least one of the edges Of the mortise Overlying the other on their opposite surfaces.
  • An electrical contact consisting of a single integral metallic sheet in generally tubular form, with a mounting portion, a neck portion, and a plurality of longitudinal slots between the mounting portion and the neck defining a plurality of separate spring fingers angularly disposed with respect to each other and extending longitudinally of the contact,- with the'neckeomprising a split sleeve with opposite-edges securedto each other by a mortise of generally circular shape and a tenon of trapezoidal, dovetail shape whereinat least one tab adjacent the neck of the mortise overlies the tenon on one surface thereof,

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Description

June 21, 1955 E. BEAVER 2,711,524
ELECTRICAL CONTACT Filed Oct. 8, 1952 i q a C W%/ ww United States Patent O "2,711,524: I ELECTRICAL CONTACT Erick Beaver, Chicago, Ill.,- assignorto American Phenolic Corporation, Chicago, III., a corporation of Illinois This invention relates to contacts for electrical connectors and has specific referenceto a female contact of novel design and construction whereby some of the most troublesome faults of telescoping contacts employed in the prior art are overcome. It is a primary aim of the invention to accomplish these desirable results by a simplified structure, which isboth economical to manufacture and dependable in use.
It is a more specific object of the invention to provide an improved contact having resilient spring fingers adapted to slidably engage a contact pin inserted therein, together with means to prevent damaging the contact by abnormal flexing of the spring portions upon insertion of oversize contact pins. This is accomplished according to the present invention by the provision of a contact in the form of a split sleeve, with a neck or aperture of fixed diameter, and provided with positive means to prevent spreading. With this arrangement, the contact will not accept contact pins sufficiently oversize as to damage the spring elements thereof.
According to the present teachings, the neck of the contact is prevented from spreading by interlocking the relatively thin edges of the split sleeve with a unique fastening or joint, which comprises a form of mortise and tenon particularly useful in this specific application, and so designed as to hold the mortise and tenon flush with g each other and thus effectively prevent their disengagement, even when the coacting parts are formed of very thin sheet metal, as in the present disclosure.
The preferred embodiment of the invention is illustrated in the drawings attached hereto, wherein:
Figure l is an enlarged elevational view of an electrical contact constructed in accordance with this invention;
Figures 2, 3 and 4 are detail sectional views taken on the planes of the lines 2-2, 33 and 44, respectively;
Figure 5 is an enlarged fragmental sectional view of the forward end of the contact, the view being taken substantially on the plane of the line 55 of Figure 1;
Figure 6 is an enlarged fragmental plan view of the blank from which the contact is formed;
Figure 7 is a greatly enlarged detail plan view of the dovetail joint interconnecting the opposite edges of the contact at the neck portion thereof;
Figure 8 is a detail sectional view taken substantially on the plane of the line 8-8 of Figure 7; and
Figure 9 is a detail sectional view taken substantially on the plane of the line 9-9 of Figure 7.
The entire contact is formed of a single sheet metal stamping, cut and formed to provide a tubular forward portion or neck 10 of fixed diameter, behind which a plurality of sheet metal spring fingers 11 are arranged to accomplish a resilient electrical connection with a contact pin inserted through the neck. A mounting portion 12 is provided to secure the contact within the dielectric insert of an electrical connector, and the end of the contact opposite the neck 10 is provided with an open sided solder pocket 13 as is conventional in the art. As shown, the mounting portion is inwardly crimped at the points 14 to provide means for anchoring the conmet in the insert of the connector, as well as to close the inside end of the solder pocket.
The forward end of the contact is shown in enlarged view in Figure 5, where it will be seen that the metal is cut away along parallel longitudinal slots 15 so as to form three angularly disposed spring contact fingers 16 extending between the mounting portion 12 and the neck portion 10 of the contact.
The extreme end of the neck portion 10 may be slightly flared at 17, if desired, and is arranged to receive a round contact pin having a diameter not greater than the diameter D indicated in Figure 5. The spring fingers 16 of the contact are imparted with a permanent set such that they will bearinwardly against such'a contact pin with adequate force to establish a firm electrical contact therewith, but since the neck of the contact limits the size of pin to be inserted, the fingers 16 cannot be flexed to the point of permanent distortion by inserting or attempting to insert an oversize contact pin into the connector. It follows that the resiliency of the fingers cannot be impaired'by normal use.
The manner in which the opposite edges of the neck portion 10 of the contact are interlocked with each other is one of the features of novelty of this invention and is illustrated in detail in Figures 7, 8 and 9. In these figures it will be seen that the connection is accomplished by a peculiar dovetail or mortise and tenon joint wherein the interconnecting parts of the joint are not cut to fit each other as is conventional practice, but are so cut that two of the edges of each part overlap the other, with the outer corners of the dovetail tenon overlapping the mortise, and with tabs at the neck of the mortise overlapping the tenon. This structure results in a unique interlock which prevents the tenon from slipping out of the mortise even when the metal is so flattened that it is reduced to the thickness of a single sheet as it is forced into final shape by the forming dies employed in manufacturing the contact.
It will be seen, for example, that the dovetail 21 is of generally trapezoidal form having a straight end 22 parallel with the edge 23, and with angularly divergent side edges 24 and 25. The mortise 26 in the opposite edge 27 of the metal is somewhat more circular in shape, having an inside width IW somewhat less than the outside width OW of the dovetail 21, and with a neck portion N of considerably less width than the width W at the inner end of the dovetail 21. Thus, while the opposite interconnecting parts of this joint do not fit each other in the strict sense of the word, yet they may be forced together, and when this is done the flattening of the two halves of the joint into the same plane will cause the neck of the mortise to overlie the dovetail in the areas A and B, while the outer corners of the dovetail will overlie the mortise opening in the areas C and D. Thus, when the metal surfaces are forced flush, the oppositely disposed overlapping edges in these areas serve to effectively interlock the dovetail in the mortise and hold the surfaces of the dovetail and mortise flush with each other, so that they cannot be released by any strain insufficient to rupture the metal.
By this arrangement the present invention provides an improved contact, formed of a single split sleeve but having a pin aperture of fixed dimensions which is not subject to spreading, notwithstanding the fact that the neck itself is formed of split sleeve construction. Moreover, this is accomplished without any encircling rings, collars or reinforcements which add to the expense and increase the complications of manufacture.
Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:
1. An electrical contact consisting of a single integral metallic sheet in generally tubular form, with a mounting portion, a neck portion, and a plurality of longitudinal slots between the mounting portion and the neck defining a plurality of separate spring fingers angularly disposed with respect to each other and extending longitudinally of the mortise of lesser width than the dovetail, and with at least one of the edges of the dovetail and at least one of the edges of the mortise overlying the other Orr-their opposite surfaces.
2. An electrical contact having a neck comprising a split sleeve with opposite edges secured to each other by a mortise and tenon wherein the tenon consists of a thin metal dovetail integral with and projecting from one edge of the split sleeve, and the mortise consists of an undercut notch in the opposite edge thereof, with a portion of the dovetail of greater width than the mortiseand with a portion of the mortise of lesser width than the dovetail, and with at least one of the edges of the dovetail filid at least one of the edges Of the mortise Overlying the other on their opposite surfaces.
3. An electrical contact consisting of a single integral metallic sheet in generally tubular form, with a mounting portion, a neck portion, and a plurality of longitudinal slots between the mounting portion and the neck defining a plurality of separate spring fingers angularly disposed with respect to each other and extending longitudinally of the contact,- with the'neckeomprising a split sleeve with opposite-edges securedto each other by a mortise of generally circular shape and a tenon of trapezoidal, dovetail shape whereinat least one tab adjacent the neck of the mortise overlies the tenon on one surface thereof,
Kor'tick Dec. 15, 1908 2,128,132 Frederick Aug. 23, 1938 2,317,198 Kasper Apr. 20, 1943 2,563,761
Uline Aug. 7, 1951
US313682A 1952-10-08 1952-10-08 Electrical contact Expired - Lifetime US2711524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US313682A US2711524A (en) 1952-10-08 1952-10-08 Electrical contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US313682A US2711524A (en) 1952-10-08 1952-10-08 Electrical contact

Publications (1)

Publication Number Publication Date
US2711524A true US2711524A (en) 1955-06-21

Family

ID=23216678

Family Applications (1)

Application Number Title Priority Date Filing Date
US313682A Expired - Lifetime US2711524A (en) 1952-10-08 1952-10-08 Electrical contact

Country Status (1)

Country Link
US (1) US2711524A (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031641A (en) * 1957-10-17 1962-04-24 Camzi Jules Paul Electric contact member
US3083345A (en) * 1960-11-21 1963-03-26 Amp Inc Electrical connector
US3099510A (en) * 1960-04-25 1963-07-30 Gorn Electric Company Inc Connector
US3188606A (en) * 1963-10-21 1965-06-08 Amp Inc Electrical connector
US3223962A (en) * 1963-09-30 1965-12-14 Amp Inc Plug receiving contact
US3246284A (en) * 1963-04-02 1966-04-12 Chrysler Corp Electrical connector
US3317887A (en) * 1964-12-16 1967-05-02 Amp Inc Contact socket
US3381261A (en) * 1964-09-03 1968-04-30 Sealectro Corp Electrical sockets
US3383647A (en) * 1965-09-30 1968-05-14 Joseph F. Duffield Spring loaded side contact
US3621445A (en) * 1969-02-13 1971-11-16 Molex Products Co Printed circuit board lead wire receptacle
US3631373A (en) * 1970-05-20 1971-12-28 Berg Electronics Inc Pluggable socket connector
US3686625A (en) * 1969-12-10 1972-08-22 Molex Products Co Solder resist
US3975079A (en) * 1975-04-11 1976-08-17 International Telephone And Telegraph Corporation Pin and socket terminal connector using clad material
US4304457A (en) * 1977-12-27 1981-12-08 Sloan Valve Company Electrical connector
US4448477A (en) * 1982-03-19 1984-05-15 General Motors Corporation Electric socket terminal
US4652842A (en) * 1983-03-21 1987-03-24 Amp Incorporated Stamped and formed filter pin terminal having an aperture for preventing solder wicking
US4712299A (en) * 1986-02-21 1987-12-15 Electronic Plating Service, Inc. Process for producing electrical contacts for facilitating mass mounting to a contact holder
EP0357816A1 (en) * 1988-09-07 1990-03-14 Weidmüller Interface GmbH & Co. Double-pronged flat spring contact
US5326289A (en) * 1993-07-12 1994-07-05 Leisey Donald R Female hyperboloid electrical connector and the method for fabricating same
DE19741346A1 (en) * 1997-09-19 1999-03-25 Whitaker Corp Dovetail arrangement for connecting wall sections of an electrical contact
US20050124231A1 (en) * 2003-12-03 2005-06-09 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Female terminal
US20070173100A1 (en) * 2005-02-11 2007-07-26 Winchester Electronics Corporation Snap lock connector
EP2800205A1 (en) * 2013-05-03 2014-11-05 Taller GmbH Partially solid hollow pin
US20190131755A1 (en) * 2016-05-03 2019-05-02 Amphenol-Tuchel Electronics Gmbh Radial jack

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US906806A (en) * 1908-06-03 1908-12-15 John C Kortick Pipe-hanger.
US2128132A (en) * 1932-10-12 1938-08-23 Continental Diamond Fibre Co Socket
US2317198A (en) * 1940-02-23 1943-04-20 Midland Steel Prod Co Sheet metal forming equipment
US2563761A (en) * 1945-09-20 1951-08-07 Bendix Aviat Corp Socket connector having an indented solder wall

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US906806A (en) * 1908-06-03 1908-12-15 John C Kortick Pipe-hanger.
US2128132A (en) * 1932-10-12 1938-08-23 Continental Diamond Fibre Co Socket
US2317198A (en) * 1940-02-23 1943-04-20 Midland Steel Prod Co Sheet metal forming equipment
US2563761A (en) * 1945-09-20 1951-08-07 Bendix Aviat Corp Socket connector having an indented solder wall

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031641A (en) * 1957-10-17 1962-04-24 Camzi Jules Paul Electric contact member
US3099510A (en) * 1960-04-25 1963-07-30 Gorn Electric Company Inc Connector
US3083345A (en) * 1960-11-21 1963-03-26 Amp Inc Electrical connector
US3246284A (en) * 1963-04-02 1966-04-12 Chrysler Corp Electrical connector
US3223962A (en) * 1963-09-30 1965-12-14 Amp Inc Plug receiving contact
US3188606A (en) * 1963-10-21 1965-06-08 Amp Inc Electrical connector
US3381261A (en) * 1964-09-03 1968-04-30 Sealectro Corp Electrical sockets
US3317887A (en) * 1964-12-16 1967-05-02 Amp Inc Contact socket
US3383647A (en) * 1965-09-30 1968-05-14 Joseph F. Duffield Spring loaded side contact
US3621445A (en) * 1969-02-13 1971-11-16 Molex Products Co Printed circuit board lead wire receptacle
US3686625A (en) * 1969-12-10 1972-08-22 Molex Products Co Solder resist
US3631373A (en) * 1970-05-20 1971-12-28 Berg Electronics Inc Pluggable socket connector
US3975079A (en) * 1975-04-11 1976-08-17 International Telephone And Telegraph Corporation Pin and socket terminal connector using clad material
US4304457A (en) * 1977-12-27 1981-12-08 Sloan Valve Company Electrical connector
US4448477A (en) * 1982-03-19 1984-05-15 General Motors Corporation Electric socket terminal
US4652842A (en) * 1983-03-21 1987-03-24 Amp Incorporated Stamped and formed filter pin terminal having an aperture for preventing solder wicking
US4712299A (en) * 1986-02-21 1987-12-15 Electronic Plating Service, Inc. Process for producing electrical contacts for facilitating mass mounting to a contact holder
EP0357816A1 (en) * 1988-09-07 1990-03-14 Weidmüller Interface GmbH & Co. Double-pronged flat spring contact
US5326289A (en) * 1993-07-12 1994-07-05 Leisey Donald R Female hyperboloid electrical connector and the method for fabricating same
DE19741346A1 (en) * 1997-09-19 1999-03-25 Whitaker Corp Dovetail arrangement for connecting wall sections of an electrical contact
DE19741346B4 (en) * 1997-09-19 2007-12-20 The Whitaker Corp., Wilmington Dovetail electrical contact and method of making such an electrical contact
US7201617B2 (en) * 2003-12-03 2007-04-10 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Female terminal
US20050124231A1 (en) * 2003-12-03 2005-06-09 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Female terminal
US20070173100A1 (en) * 2005-02-11 2007-07-26 Winchester Electronics Corporation Snap lock connector
US7329139B2 (en) * 2005-02-11 2008-02-12 Winchester Electronics Corporation Snap lock connector
EP2800205A1 (en) * 2013-05-03 2014-11-05 Taller GmbH Partially solid hollow pin
US20190131755A1 (en) * 2016-05-03 2019-05-02 Amphenol-Tuchel Electronics Gmbh Radial jack
US10594105B2 (en) * 2016-05-03 2020-03-17 Amphenol-Tuchel Electronics Gmbh Radial jack

Similar Documents

Publication Publication Date Title
US2711524A (en) Electrical contact
DE2460848C2 (en) Current clamp
CN104253368B (en) The method for assembling electric terminal component
US2699534A (en) Two-piece separable electrical connector
US3325775A (en) Electrical terminal
DE112014002717B4 (en) Female connection
DE10161514A1 (en) socket
US3757277A (en) Electrical connector
DE1072672B (en) Electrical plug connection with insulating contact holders
US3381261A (en) Electrical sockets
US2304808A (en) Contact
DE102005053566A1 (en) Stamped and bent contact pin for power plug connection, has connection head and pin extension formed from metallic flat material, and flexible tongue arranged in connection head and producing clamping connection with terminal lead
DE2925739C2 (en)
US2866172A (en) Electrical connector
US4136923A (en) Unitary hooded electrical contact
US3273108A (en) Impact socket connector
US4767360A (en) Electric contact sockets
US3106010A (en) Spring hinge and method of assembling same
US3445930A (en) One-piece plugboard plug connector
US2822529A (en) Electrical contact with resilient arms
US3212051A (en) Electrical contact strips
US3452315A (en) Electric boards,plug contacts and system
US2209734A (en) Electrical apparatus
US2439767A (en) Electrical connector
US3636505A (en) Electrical pin with tab receptacles and method of making same