US2728062A - Spring loaded butt contact with external contacting sleeve - Google Patents

Spring loaded butt contact with external contacting sleeve Download PDF

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Publication number
US2728062A
US2728062A US324046A US32404652A US2728062A US 2728062 A US2728062 A US 2728062A US 324046 A US324046 A US 324046A US 32404652 A US32404652 A US 32404652A US 2728062 A US2728062 A US 2728062A
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United States
Prior art keywords
plunger
collet
contact
jaws
conducting member
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Expired - Lifetime
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US324046A
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Curt W Klostermann
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AMERICAN PHENOLIC Corp
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AMERICAN PHENOLIC CORP
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Priority to US324046A priority Critical patent/US2728062A/en
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    • 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
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting

Definitions

  • This invention relates to electrical contacts and, more particularly, to a specific form of butt-type contacts known in the trade as pressure contacts. These are distinguished from other contact types in that the connecting elements do not telescope within each other as is cus tomary in the art, but are held in abutting engagement with each other by a pressure spring.
  • a further object of the invention is the provision of a pressure type contact including a longitudinally spring urged plunger wherein the assembly includes means for limiting the compression of the spring, so that the spring will not be flexed beyond its elastic limit and cannot be easily distorted by excessive thrusts applied to the contact plunger.
  • Another important object is to provide a spring urged contact wherein the pressure spring utilized therewith does not form a part of the electrical circuit. This avoids unwanted inductive elrects due to the coils of the spring, and prevents damage to the s ring by overheating by electrical overload.
  • a contact housing ar ranged to be secured within the insulated dielectric of an electrical connector and provided with a main conducting member having an annular spring collet held in the hou: ing adjacent the rear end thereof, with a plurality of yieldable spring jaws extending forwardly v housin sleeve and biased inwardly to engage the ex terior cylindrical surface of a spring urged contact plunger in the collet bore.
  • the collet is provided with a tapered mouth and an enlarged internal cavity behind the jaw portions to coact with an annular collar on the plunger, so that the parts may be assembled simply by pressing the plunger into the collet, which will snap the plunger in place to retain it against removal.
  • the arrangement is such that expansion of the collet is limited by its exterior housing so that the jaws of the collet cannot be flexed outwardly sufiiciently to distort them.
  • the exterior housing may be fitted so that when the plunger is once assembled in the collet, they cannot be disassembled without entirely dismantling the device.
  • the plunger is urged longitudinally by a relatively small coil spring housed entirely within the plunger and so arranged that the plunger itself forms a limiting stop to prevent excessive thrusts on the plunger from damaging the spring.
  • Figure l is a central sectional view of a contact asment with a mating contact
  • Figure 2 is a detail sectional view taken substantially on the plane of the line 22 of Figure l;
  • Figure 3 is a perspective view of the main conducting member of the assembly.
  • the novelty of the present invention resides in the pressure contact assembly generally designated as 10, which may be mounted in the dielectric insert 11 of a connector shell to be held in contacting engagement with the forward face 12 of a mating contact 13 mounted in an opposite dielectric member 14.
  • the pressure contact assembly member 10 includes a main conducting member 35 ( Figure 3) mounted within a sleeve-like housing 16 and secured to the dielectric insert 11 by a threaded collar or coupling ring 17.
  • the main conducting member 15 includes an enlarged central flange 21 with a tubular portion 22 extending rearwardly therefrom and cut away at 23 to provide a soldering pocket 24 in which a flexible conductor may be secured.
  • the forward portion 25 of the main conducting member is of tubular configuration, but is slotted at 26 to provide a plurality of separate, resilient jaws 27 which coact to form a collet having arcuate inner slide surfaces 28 at the forward end thereof.
  • each of the collet jaws 1S tapered as indicated at 29 to facilitate the entrance of a contact slide plunger generally designated as 31.
  • the plunger 31 includes a projecting head or contact portion 32 adapted to engage the face 12 of the mating contact 13, and a tubular rear portion 33 having an internal bore 34 in which a small helical coiled compression spring 35 is positioned.
  • the plunger has an enlarged collar 36 intermediate the portions 32 and 33, and the collar is preferably tapered at 37 so that the surfaces 37 and 2? will coact to spread the collet jaws 27 as the plunger is pressed into place.
  • the internal bore of the collet is undercut at 38, however, to provide a reverse shoulder 39 which engages the enlarged collar 31, to limit theoutward movement of the plunger.
  • the plunger 31 and spring 35 may be assembled by merely inserting them in the collet and snapping them into place, after which they are self-retaining.
  • the plunger head 32 is held in snug sliding contact within the collet jaws, but is free to move inwardly and outwardly within the limits provided by the shoulder 39 of the undercut 33-; and engagement of the rear portion of the sleeve 34 with the bottom of the collet bore.
  • the jaws of the collet include individual arcuate friction or wiping contacts which lie in surface-to-surface contact with the plunger head 32 in a location close to the point of engagement between the contact 32 and the mating contact face 12. This not only provides an intimate electrical union between the stationary and movable parts of the assembly, but also provides adequate metal around the contact to eiiectively dissipate any heat produced by the passage of electrical current therethrough.
  • the coacting parts of the entire assembly are of heavy, rugged construction and thus are able to withstand considerable mechanical abuse as well as having the ability to withstand considerable electrical I; t I 2,728,062
  • a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough and having a screw threaded rear end portion projecting from the insert, with a retaining cap threaded thereon; a main conducting member held within said mounting sleeve, said main conductor having an enlarged flange intermediate its ends and secured to the rear end of the mounting sleeve by said threaded cap, the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being substantially cylindrical and spaced nwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore flared at the forward end thereof and having an enlarged undercut at a point intermediate the ends of said jaws; a contact
  • a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough with a main conducting member held within said mounting sleeve and secured to the rear end of the mounting sleeve; the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being spaced inwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore and having an enlarged undercut at a point intermediate the ends of said jaws; a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet jaws, with an annular collar intermediate the ends of the plunger adapted for limited longitudinal movement in the undercut portions of said collet jaws, and a central bore
  • a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough and having a screw threaded rear end portion projecting from the insert with a retaining cap threaded thereon; a main conducting member held within said mounting sleeve, said main conductor having an enlarged flange intermediate its ends and secured to the rear end of the mounting sleeve by said threaded cap, the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being substantially cylindrical and spaced inwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore flared at the forward end thereof; a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet
  • a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough with a main conducting member held within said mounting sleeve and secured to the rear end of the mounting sleeve; the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being spaced inwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore with a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet aws, with a bore extending into said plunger from the rear end thereof; a coiled compression spring housed within said bore and bearing against the main conducting member to urge the plunger forwardly therefrom, and means to limit the forward movement of

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Description

Dec. 20, 1955 c. w. KLOSTERMANN 2,728,062
SPRING LOADED BUTT CONTACT WITH EXTERNAL CONTACTING SLEEVE Filed Dec. 4, 1952 K r yll ii INVENTOR.
United States Patent Ofilice 2,728,062 Patented Dec. 20, 1955 SPRING LOADED BUTT CONTACT WITH EXTERNAL CONTACTING SLEET.
This invention relates to electrical contacts and, more particularly, to a specific form of butt-type contacts known in the trade as pressure contacts. These are distinguished from other contact types in that the connecting elements do not telescope within each other as is cus tomary in the art, but are held in abutting engagement with each other by a pressure spring.
It is the general aim of the invention to provide a spring loaded contact assembly having an exterior housing and a main conducting member joined to its conductor, with an internal sliding contact plunger which is capable of accomplishing smooth, positive sliding move ment of a contact plunger with respect to the conducting member, while maintaining a low electrical resistance between the plunger and parts within which it slides.
A further object of the invention is the provision of a pressure type contact including a longitudinally spring urged plunger wherein the assembly includes means for limiting the compression of the spring, so that the spring will not be flexed beyond its elastic limit and cannot be easily distorted by excessive thrusts applied to the contact plunger.
7 Another important object is to provide a spring urged contact wherein the pressure spring utilized therewith does not form a part of the electrical circuit. This avoids unwanted inductive elrects due to the coils of the spring, and prevents damage to the s ring by overheating by electrical overload.
It is a still further object of the invention to provide produced by mass production methods or" manufacture.
These objects are accomplished according to the present teaching by the provision of a contact housing ar ranged to be secured within the insulated dielectric of an electrical connector and provided with a main conducting member having an annular spring collet held in the hou: ing adjacent the rear end thereof, with a plurality of yieldable spring jaws extending forwardly v housin sleeve and biased inwardly to engage the ex terior cylindrical surface of a spring urged contact plunger in the collet bore. In the preferred form of the invention the collet is provided with a tapered mouth and an enlarged internal cavity behind the jaw portions to coact with an annular collar on the plunger, so that the parts may be assembled simply by pressing the plunger into the collet, which will snap the plunger in place to retain it against removal. The arrangement is such that expansion of the collet is limited by its exterior housing so that the jaws of the collet cannot be flexed outwardly sufiiciently to distort them. Also, if desired, the exterior housing may be fitted so that when the plunger is once assembled in the collet, they cannot be disassembled without entirely dismantling the device.
As shown, the plunger is urged longitudinally by a relatively small coil spring housed entirely within the plunger and so arranged that the plunger itself forms a limiting stop to prevent excessive thrusts on the plunger from damaging the spring.
A preferred embodiment of the invention is illustrated in the drawings of this specification, wherein:
Figure l is a central sectional view of a contact asment with a mating contact;
Figure 2 is a detail sectional view taken substantially on the plane of the line 22 of Figure l; and
Figure 3 is a perspective view of the main conducting member of the assembly.
The novelty of the present invention resides in the pressure contact assembly generally designated as 10, which may be mounted in the dielectric insert 11 of a connector shell to be held in contacting engagement with the forward face 12 of a mating contact 13 mounted in an opposite dielectric member 14.
The pressure contact assembly member 10 includes a main conducting member 35 (Figure 3) mounted within a sleeve-like housing 16 and secured to the dielectric insert 11 by a threaded collar or coupling ring 17. The main conducting member 15 includes an enlarged central flange 21 with a tubular portion 22 extending rearwardly therefrom and cut away at 23 to provide a soldering pocket 24 in which a flexible conductor may be secured. The forward portion 25 of the main conducting member is of tubular configuration, but is slotted at 26 to provide a plurality of separate, resilient jaws 27 which coact to form a collet having arcuate inner slide surfaces 28 at the forward end thereof.
As shown, the forward end of each of the collet jaws 1S tapered as indicated at 29 to facilitate the entrance of a contact slide plunger generally designated as 31. The plunger 31 includes a projecting head or contact portion 32 adapted to engage the face 12 of the mating contact 13, and a tubular rear portion 33 having an internal bore 34 in which a small helical coiled compression spring 35 is positioned. The plunger has an enlarged collar 36 intermediate the portions 32 and 33, and the collar is preferably tapered at 37 so that the surfaces 37 and 2? will coact to spread the collet jaws 27 as the plunger is pressed into place. The internal bore of the collet is undercut at 38, however, to provide a reverse shoulder 39 which engages the enlarged collar 31, to limit theoutward movement of the plunger. Thus, the plunger 31 and spring 35 may be assembled by merely inserting them in the collet and snapping them into place, after which they are self-retaining.
With this arrangement, it will be seen that the plunger head 32. is held in snug sliding contact within the collet jaws, but is free to move inwardly and outwardly within the limits provided by the shoulder 39 of the undercut 33-; and engagement of the rear portion of the sleeve 34 with the bottom of the collet bore. The jaws of the collet include individual arcuate friction or wiping contacts which lie in surface-to-surface contact with the plunger head 32 in a location close to the point of engagement between the contact 32 and the mating contact face 12. This not only provides an intimate electrical union between the stationary and movable parts of the assembly, but also provides adequate metal around the contact to eiiectively dissipate any heat produced by the passage of electrical current therethrough. The coacting parts of the entire assembly are of heavy, rugged construction and thus are able to withstand considerable mechanical abuse as well as having the ability to withstand considerable electrical I; t I 2,728,062
surrounds the collet jaws 27 sufficiently closely to limit outward flexing of the jaws, and thus prevents the jaws from being distorted to the point where they exceed their elastic limit and lose their resiliency.
Having thus described my invention, what i claim as new and desire to secure by United States Patent is:
1. In an electrical connector, a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough and having a screw threaded rear end portion projecting from the insert, with a retaining cap threaded thereon; a main conducting member held within said mounting sleeve, said main conductor having an enlarged flange intermediate its ends and secured to the rear end of the mounting sleeve by said threaded cap, the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being substantially cylindrical and spaced nwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore flared at the forward end thereof and having an enlarged undercut at a point intermediate the ends of said jaws; a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet jaws, with an annular collar intermediate the ends of the plunger adapted for limited longitudinal movement in the undercut portions of said collet jaws, and a central bore extending into said plunger from the rear end thereof, with a coiled compression spring housed within said bore and bearing against the main conducting member to urge the plunger forwardly therefrom.
2. In an electrical connector, a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough with a main conducting member held within said mounting sleeve and secured to the rear end of the mounting sleeve; the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being spaced inwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore and having an enlarged undercut at a point intermediate the ends of said jaws; a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet jaws, with an annular collar intermediate the ends of the plunger adapted for limited longitudinal movement in the undercut portions of said collet jaws, and a central bore extending into said plunger from the rear end thereof, with a coiled compression spring housed within said bore and bearing against the main conducting member to urge the plunger forwardly therefrom.
3. In an electrical connector, a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough and having a screw threaded rear end portion projecting from the insert with a retaining cap threaded thereon; a main conducting member held within said mounting sleeve, said main conductor having an enlarged flange intermediate its ends and secured to the rear end of the mounting sleeve by said threaded cap, the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being substantially cylindrical and spaced inwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore flared at the forward end thereof; a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet jaws, with a bore extending into said plunger from the rear end thereof; a coiled compression spring housed within said bore and bearing against the main conducting member to urge the plunger forwardly therefrom, and means to limit the forward movement of the plunger.
4. In an electrical connector, a mounting sleeve adapted to be secured within a dielectric insert, said sleeve having a cylindrical bore extending therethrough with a main conducting member held within said mounting sleeve and secured to the rear end of the mounting sleeve; the main conducting member including a tubular solder pocket portion extending rearwardly from said cap and a forward portion of generally tubular conformation with a plurality of longitudinal slots therein dividing the forward portion into a plurality of collet jaws, the exterior surface of said collet jaws being spaced inwardly of but close to the cylindrical bore of the mounting sleeve, said collet jaws having an internal slide bore with a contact plunger having a cylindrical head portion in sliding engagement with the forward ends of the collet aws, with a bore extending into said plunger from the rear end thereof; a coiled compression spring housed within said bore and bearing against the main conducting member to urge the plunger forwardly therefrom, and means to limit the forward movement of the plunger.
References Cited in the file of this patent UNITED STATES PATENTS
US324046A 1952-12-04 1952-12-04 Spring loaded butt contact with external contacting sleeve Expired - Lifetime US2728062A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875308A (en) * 1953-04-25 1959-02-24 Soc Nouvelle Outil Rbv Radio Photoresistive cells
US3003135A (en) * 1956-12-28 1961-10-03 Amphenol Borg Electronics Corp Electrical contacts
US3019637A (en) * 1959-03-24 1962-02-06 Curtiss Wright Corp Ultrasonic testing arrangement
US3363220A (en) * 1966-01-12 1968-01-09 Litton Systems Inc Electrical connector
US3517373A (en) * 1967-01-14 1970-06-23 Satra Ets Cable connector
US3771110A (en) * 1971-11-23 1973-11-06 Walton Prod Inc Electrical contact pins
USRE28328E (en) * 1968-08-14 1975-02-04 Latch type pyrotechnic detonator circuit test probe
US3887257A (en) * 1974-01-02 1975-06-03 Itt Electrical connector
US4518213A (en) * 1983-05-31 1985-05-21 Allied Corporation One piece hermaphroditic contact for an electrical connector and a method of making the contact
US4696524A (en) * 1986-03-03 1987-09-29 Custom Tool & Mfg. Co. Robot arm coupling apparatus
WO1989011171A1 (en) * 1988-05-06 1989-11-16 United Technologies Automotive, Inc. Vehicular modular door panel assembly with laterally extended electrical contact interfacing
EP0435408A2 (en) * 1989-11-17 1991-07-03 FABEG GmbH Resilient pressure contacts
FR2671675A1 (en) * 1991-01-11 1992-07-17 Spinner Georg DEVICE FOR JOINING THE INTERIOR CONDUCTOR OF A COAXIAL CABLE.
WO1998004018A2 (en) * 1996-07-19 1998-01-29 Ericsson Inc. Radiotelephone having a combination fastener and electrical connector
US20180202473A1 (en) * 2017-01-17 2018-07-19 Airtac International Group Connecting Device of a Manifold Valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US896210A (en) * 1906-05-16 1908-08-18 Westinghouse Electric & Mfg Co Contact member.
US1605904A (en) * 1925-09-16 1926-11-02 Vernon Van Brunt Electrical connecter
US2563712A (en) * 1945-08-18 1951-08-07 Bendix Aviat Corp Electrical connector having resilient inserts

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US896210A (en) * 1906-05-16 1908-08-18 Westinghouse Electric & Mfg Co Contact member.
US1605904A (en) * 1925-09-16 1926-11-02 Vernon Van Brunt Electrical connecter
US2563712A (en) * 1945-08-18 1951-08-07 Bendix Aviat Corp Electrical connector having resilient inserts

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875308A (en) * 1953-04-25 1959-02-24 Soc Nouvelle Outil Rbv Radio Photoresistive cells
US3003135A (en) * 1956-12-28 1961-10-03 Amphenol Borg Electronics Corp Electrical contacts
US3019637A (en) * 1959-03-24 1962-02-06 Curtiss Wright Corp Ultrasonic testing arrangement
US3363220A (en) * 1966-01-12 1968-01-09 Litton Systems Inc Electrical connector
US3517373A (en) * 1967-01-14 1970-06-23 Satra Ets Cable connector
USRE28328E (en) * 1968-08-14 1975-02-04 Latch type pyrotechnic detonator circuit test probe
US3771110A (en) * 1971-11-23 1973-11-06 Walton Prod Inc Electrical contact pins
US3887257A (en) * 1974-01-02 1975-06-03 Itt Electrical connector
US4518213A (en) * 1983-05-31 1985-05-21 Allied Corporation One piece hermaphroditic contact for an electrical connector and a method of making the contact
US4696524A (en) * 1986-03-03 1987-09-29 Custom Tool & Mfg. Co. Robot arm coupling apparatus
WO1989011171A1 (en) * 1988-05-06 1989-11-16 United Technologies Automotive, Inc. Vehicular modular door panel assembly with laterally extended electrical contact interfacing
EP0435408A2 (en) * 1989-11-17 1991-07-03 FABEG GmbH Resilient pressure contacts
EP0435408A3 (en) * 1989-11-17 1992-01-02 Fabeg Gmbh Resilient pressure contacts
FR2671675A1 (en) * 1991-01-11 1992-07-17 Spinner Georg DEVICE FOR JOINING THE INTERIOR CONDUCTOR OF A COAXIAL CABLE.
WO1998004018A2 (en) * 1996-07-19 1998-01-29 Ericsson Inc. Radiotelephone having a combination fastener and electrical connector
WO1998004018A3 (en) * 1996-07-19 1998-03-26 Ericsson Ge Mobile Inc Radiotelephone having a combination fastener and electrical connector
AU721271B2 (en) * 1996-07-19 2000-06-29 Ericsson Inc. Radiotelephone having a combination fastener and electrical connector
US20180202473A1 (en) * 2017-01-17 2018-07-19 Airtac International Group Connecting Device of a Manifold Valve

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