US2789276A - Terminal clamp - Google Patents

Terminal clamp Download PDF

Info

Publication number
US2789276A
US2789276A US423487A US42348754A US2789276A US 2789276 A US2789276 A US 2789276A US 423487 A US423487 A US 423487A US 42348754 A US42348754 A US 42348754A US 2789276 A US2789276 A US 2789276A
Authority
US
United States
Prior art keywords
plate
screw
tongues
terminal
clamp
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
US423487A
Inventor
John G Hummel
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.)
Crouse Hinds Co
Original Assignee
Crouse Hinds Co
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 Crouse Hinds Co filed Critical Crouse Hinds Co
Priority to US423487A priority Critical patent/US2789276A/en
Application granted granted Critical
Publication of US2789276A publication Critical patent/US2789276A/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
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • 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

Definitions

  • This invention relates to terminal clamps employed to detachably connect electrical conductors to the terminals of electrical apparatus.
  • this type of connector consists of a tubular or bOXlll-l body portion for the reception of the end of the conductor which is clamped therein by a plate actuated by a screw threading into the body.
  • the clamping plate is apertured to rotatably receive the inner end of the screw, the plate being swiveled on the screw by the inner end of the screw being headed or swedged over the plate.
  • the plate is interfitted with the body of the terminal so as to have sliding movement relative thereto in a direction axially of the screw. These arrangements are to prevent accidental displacement of the plate from the body of the terminal. Such constructions are expensive to manufacture.
  • This invention has as an object a terminal clamp of the type referred to embodying a structural arrangement whereby the conductor clamping plate is afiixed swivel fashion to the actuating screw without riveting or interconnecting the clamp plate to the body of the terminal.
  • Figure 1 is a plan view of the contact unit of a plug or receptacle provided with terminal clamps embodying my invention.
  • Figure 2 is a side elevational view of the structure shown in Figure 1, the left portion of the figure being shown in section taken on line 2-2, Figure 1.
  • Figure 3 is a side elevational view of one of the terminals shown in Figures 1 and 2, the upper portion being shown in section.
  • Figure 4 is a side elevational view of the actuating screw, the inner portion thereof and the clamp plate being shown in section.
  • Figure 5 is a plan view of the clamp plate and actuating screw.
  • the terminal clamp consists of a tubular body attached to a circuit forming element of an electrical apparatus. As here shown, the body 10 is attached to the end portion of a contact 11 of the type commonly employed in plug and receptacle units. These contacts are mounted in a body or contact carrying member 12 formed of insulating material.
  • the tubular portion 11, shown herein, is rectangular in cross section and is mounted in a rectangular recess 13 formed in the supporting member 12.
  • the tubular body is formed with a threaded aperture in one of its side walls 2,789,276 Patented Apr. 16, 1957 to receive an actuating screw 14, the inner end of which is formed with a stem 15.
  • the end of the conductor 17 is positioned in the tubular body 10 and is fixedly clamped therein by a plate 18.
  • the central portion of this plate is apertured and depressed on opposite sides of the aperture to form a pair of confronting tongues 20.
  • the tongues 20 extend lengthwise of the plate and are inclined from the plane of the plate 18 toward the screw 14, and with the confronting end edges of the tongues initially spaced apart a sufficient distance to receive the enlarged head portion 22 of the stem 15.
  • the plate 13 is positioned within the tubular member 10 and the screw 14 threaded inwardly, the head portion 22 of the stem 15 passing between the confronting edges of the tongues 21), and as the plate is moved against the opposite side wall of the tubular member, the tongues 20 are moved inwardly toward the plane of the plate 18, thus reducing the space between the confronting edges of the tongues, whereby the head portion 22 overlies the inner surface of the tongues and accordingly, the plate is swiveled to the screw without any riveting or swedging operation performed on the stem 15.
  • the tubular member 10 is formed with a cylindrical bore 25 and the plate 18 has a widthwise dimension somewhat less than the diameter of the bore of the body, and the plate 18 preferably has a lengthwise dimension substantially greater than the diameter of the body bore 25, whereby the plate is maintained in axial relation to the bore of the body 10.
  • the plate 18 it is not necessary to provide any interfitting sliding structure between the plate 18 and the body member 10 and, as previously pointed out, the riveting operation for 'aflixing the plate to the screw is avoided.
  • the plate 18 has a widthwise dimension somewhat less than the diameter of the bore of the body
  • the plate 18 preferably has a lengthwise dimension substantially greater than the diameter of the body bore 25, whereby the plate is maintained in axial relation to the bore of the body 10.
  • a terminal clamp comprising a tubular body having a threaded aperture in the side wall thereof, a screw threaded through said aperture and being formed at its inner end with an axially extending stem of reduced diameter and having an enlarged head portion at the end thereof, a conductor clamp plate positioned in said tubular member, said plate being formed with a pair of aligned deformable tongues with their confronting ends spaced apart a distance slightly greater than the diameter of said stem and being initially inclined from the plane of the plate towards said screw, with the confronting ends of said tongues spaced apart to admit passage of said head portion of the stem for engagement of said tongues by said screw whereby, upon tightening said screw, said tongues are moved into the plane of said plate to retain the same on said stem for swivel action relative thereto.

Description

April 1957 J. G. HUMMEL 2,789,276
' TERMINAL CLAMP Filed April 15, 1954 IN V EN TOR.
95/721 (9. Hummel BY fliforfley.
United States Patent TERMINAL CLAMP John G. Hummel, De Witt, N. Y., assignor to Crouse- Hinds Company, Syracuse, N. Y., a corporation of New York Application April 15, 1954, Serial N 423,487
2 Claims. (Cl. 339-272) This invention relates to terminal clamps employed to detachably connect electrical conductors to the terminals of electrical apparatus.
In general, this type of connector consists of a tubular or bOXlll-l body portion for the reception of the end of the conductor which is clamped therein by a plate actuated by a screw threading into the body. In prior devices of this kind, the clamping plate is apertured to rotatably receive the inner end of the screw, the plate being swiveled on the screw by the inner end of the screw being headed or swedged over the plate. In some structures, the plate is interfitted with the body of the terminal so as to have sliding movement relative thereto in a direction axially of the screw. These arrangements are to prevent accidental displacement of the plate from the body of the terminal. Such constructions are expensive to manufacture.
This invention has as an object a terminal clamp of the type referred to embodying a structural arrangement whereby the conductor clamping plate is afiixed swivel fashion to the actuating screw without riveting or interconnecting the clamp plate to the body of the terminal.
The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.
In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.
In the drawings Figure 1 is a plan view of the contact unit of a plug or receptacle provided with terminal clamps embodying my invention.
Figure 2 is a side elevational view of the structure shown in Figure 1, the left portion of the figure being shown in section taken on line 2-2, Figure 1.
Figure 3 is a side elevational view of one of the terminals shown in Figures 1 and 2, the upper portion being shown in section.
Figure 4 is a side elevational view of the actuating screw, the inner portion thereof and the clamp plate being shown in section.
Figure 5 is a plan view of the clamp plate and actuating screw.
The terminal clamp consists of a tubular body attached to a circuit forming element of an electrical apparatus. As here shown, the body 10 is attached to the end portion of a contact 11 of the type commonly employed in plug and receptacle units. These contacts are mounted in a body or contact carrying member 12 formed of insulating material.
The tubular portion 11, shown herein, is rectangular in cross section and is mounted in a rectangular recess 13 formed in the supporting member 12. The tubular body is formed with a threaded aperture in one of its side walls 2,789,276 Patented Apr. 16, 1957 to receive an actuating screw 14, the inner end of which is formed with a stem 15. The end of the conductor 17 is positioned in the tubular body 10 and is fixedly clamped therein by a plate 18. The central portion of this plate is apertured and depressed on opposite sides of the aperture to form a pair of confronting tongues 20. The tongues 20 extend lengthwise of the plate and are inclined from the plane of the plate 18 toward the screw 14, and with the confronting end edges of the tongues initially spaced apart a sufficient distance to receive the enlarged head portion 22 of the stem 15.
The plate 13 is positioned within the tubular member 10 and the screw 14 threaded inwardly, the head portion 22 of the stem 15 passing between the confronting edges of the tongues 21), and as the plate is moved against the opposite side wall of the tubular member, the tongues 20 are moved inwardly toward the plane of the plate 18, thus reducing the space between the confronting edges of the tongues, whereby the head portion 22 overlies the inner surface of the tongues and accordingly, the plate is swiveled to the screw without any riveting or swedging operation performed on the stem 15.
Preferably, the tubular member 10 is formed with a cylindrical bore 25 and the plate 18 has a widthwise dimension somewhat less than the diameter of the bore of the body, and the plate 18 preferably has a lengthwise dimension substantially greater than the diameter of the body bore 25, whereby the plate is maintained in axial relation to the bore of the body 10. With this arrangement, it is not necessary to provide any interfitting sliding structure between the plate 18 and the body member 10 and, as previously pointed out, the riveting operation for 'aflixing the plate to the screw is avoided. Preferably, the
inner surface of the plate is serrated as at 27 to provide a firm grip on the conductor 17.
What I claim is:
1. A terminal clamp comprising a tubular body having a threaded aperture in the side wall thereof, a screw threaded through said aperture and being formed at its inner end with an axially extending stem of reduced diameter and having an enlarged head portion at the end thereof, a conductor clamp plate positioned in said tubular member, said plate being formed with a pair of aligned deformable tongues with their confronting ends spaced apart a distance slightly greater than the diameter of said stem and being initially inclined from the plane of the plate towards said screw, with the confronting ends of said tongues spaced apart to admit passage of said head portion of the stem for engagement of said tongues by said screw whereby, upon tightening said screw, said tongues are moved into the plane of said plate to retain the same on said stem for swivel action relative thereto.
2. A terminal clamp as defined in claim 1, wherein the widthwise dimension of said clamp plate is substantially less than the diameter of the body bore, and the lengthwise dimension of said plate is substantially greater than the diameter of the body bore.
References Cited in the file of this patent UNITED STATES PATENTS 1,520,702 Durham Dec. 30, 1924 2,201,674 Rowe May 21, 1940 2,265,911 Landmeier Dec. 9, 1941 2,727,220 Buchanan Dec. 13, 1955 FOREIGN PATENTS 23,877 Great Britain of 1912
US423487A 1954-04-15 1954-04-15 Terminal clamp Expired - Lifetime US2789276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US423487A US2789276A (en) 1954-04-15 1954-04-15 Terminal clamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US423487A US2789276A (en) 1954-04-15 1954-04-15 Terminal clamp

Publications (1)

Publication Number Publication Date
US2789276A true US2789276A (en) 1957-04-16

Family

ID=23679073

Family Applications (1)

Application Number Title Priority Date Filing Date
US423487A Expired - Lifetime US2789276A (en) 1954-04-15 1954-04-15 Terminal clamp

Country Status (1)

Country Link
US (1) US2789276A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015084A (en) * 1959-02-26 1961-12-26 Square D Co Electrical connector
US3020516A (en) * 1958-04-25 1962-02-06 Pass & Seymour Inc Electrical connector body and cap construction with improved conductor securing means
US4050774A (en) * 1976-06-30 1977-09-27 General Electric Company Cap and connector for five-wire applications
FR2410380A1 (en) * 1977-11-29 1979-06-22 Weidmueller Kg C PLUG-IN CONNECTOR
US20080183171A1 (en) * 2007-01-26 2008-07-31 Ebi, L.P. Lockable intermedullary fixation device
US20080221577A1 (en) * 2007-01-26 2008-09-11 Ebi, Llc Intramedullary implant with locking and compression devices
US20080294164A1 (en) * 2007-01-26 2008-11-27 Ebi, Llc. Lockable intramedullary fixation device
US20100152740A1 (en) * 2007-10-16 2010-06-17 Ebi, Llc Method and apparatus for orthopedic fixation
US9308031B2 (en) 2007-01-26 2016-04-12 Biomet Manufacturing, Llc Lockable intramedullary fixation device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191223877A (en) * 1911-10-20 1912-12-19 Stotz & Cie Elek Citaets Ges M Plug for Electrical Plug Contacts.
US1520702A (en) * 1924-02-19 1924-12-30 Bonney Forge & Tool Works Method of making thumbscrews and caps
US2201674A (en) * 1938-03-12 1940-05-21 Trumbull Electric Mfg Co Electrical terminal
US2265911A (en) * 1939-08-18 1941-12-09 Wadsworth Electric Mfg Co Solderless wire connector
US2727220A (en) * 1951-11-15 1955-12-13 Buchanan Electrical Prod Corp Electric connector with set screw

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191223877A (en) * 1911-10-20 1912-12-19 Stotz & Cie Elek Citaets Ges M Plug for Electrical Plug Contacts.
US1520702A (en) * 1924-02-19 1924-12-30 Bonney Forge & Tool Works Method of making thumbscrews and caps
US2201674A (en) * 1938-03-12 1940-05-21 Trumbull Electric Mfg Co Electrical terminal
US2265911A (en) * 1939-08-18 1941-12-09 Wadsworth Electric Mfg Co Solderless wire connector
US2727220A (en) * 1951-11-15 1955-12-13 Buchanan Electrical Prod Corp Electric connector with set screw

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020516A (en) * 1958-04-25 1962-02-06 Pass & Seymour Inc Electrical connector body and cap construction with improved conductor securing means
US3015084A (en) * 1959-02-26 1961-12-26 Square D Co Electrical connector
US4050774A (en) * 1976-06-30 1977-09-27 General Electric Company Cap and connector for five-wire applications
FR2410380A1 (en) * 1977-11-29 1979-06-22 Weidmueller Kg C PLUG-IN CONNECTOR
US20080294164A1 (en) * 2007-01-26 2008-11-27 Ebi, Llc. Lockable intramedullary fixation device
US20080221577A1 (en) * 2007-01-26 2008-09-11 Ebi, Llc Intramedullary implant with locking and compression devices
US20080183171A1 (en) * 2007-01-26 2008-07-31 Ebi, L.P. Lockable intermedullary fixation device
US8157802B2 (en) 2007-01-26 2012-04-17 Ebi, Llc Intramedullary implant with locking and compression devices
US8303590B2 (en) 2007-01-26 2012-11-06 Ebi, Llc Lockable intramedullary fixation device
US9308031B2 (en) 2007-01-26 2016-04-12 Biomet Manufacturing, Llc Lockable intramedullary fixation device
US9320551B2 (en) 2007-01-26 2016-04-26 Biomet Manufacturing, Llc Lockable intramedullary fixation device
US9572606B2 (en) 2007-01-26 2017-02-21 Biomet Manufacturing, Llc Lockable intramedullary fixation device
US9943346B2 (en) 2007-01-26 2018-04-17 Biomet Manufacturing, Llc Lockable intramedullary fixation device
US20100152740A1 (en) * 2007-10-16 2010-06-17 Ebi, Llc Method and apparatus for orthopedic fixation
US8394103B2 (en) 2007-10-16 2013-03-12 Biomet Manufacturing Corp. Method and apparatus for orthopedic fixation

Similar Documents

Publication Publication Date Title
US2429585A (en) Pressed insulated connector
US3050706A (en) Electrical connectors
US3120985A (en) Electrical connector having selective key means for different voltages
US3032603A (en) Connector with temporary cable holding means
US2307216A (en) Connector
US2789276A (en) Terminal clamp
US2732535A (en) hammerly
US3183476A (en) Connector
US4057312A (en) Connecting device at a bus bar
US3622955A (en) Electrical connector
US2957157A (en) Electrical terminal connector
US3710307A (en) Electrical connector
US3657683A (en) Combination lead wire terminal
US2709793A (en) Electric connector having jaws to receive a contact blade
US3599172A (en) Cable terminal connector, quick-connect
US2716740A (en) Explosion-proof cord connector
US2930022A (en) Cord clamp for electrical wiring device
GB1308094A (en) Electrical connectors
US3201745A (en) Angular contact connector
US3487354A (en) Connector for insulation covered conductors
US2875424A (en) Screwless means for attaching conductors to electrical devices
USRE28877E (en) Electric cable connector
US2944242A (en) Wire gripping means for electric wiring devices
US2718626A (en) Electrical connectors
US3104927A (en) Electrical connector