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Publication numberUS2372653 A
Publication typeGrant
Publication dateApr 3, 1945
Filing dateApr 19, 1940
Priority dateApr 19, 1940
Publication numberUS 2372653 A, US 2372653A, US-A-2372653, US2372653 A, US2372653A
InventorsAlan L Becket
Original AssigneeAlan L Becket
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical terminal
US 2372653 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

April 3, 1945. A. 1.. BECKET 2,372,653

' ELECTRICAL TERMINAL Filed April 19, 1940 Tlci.


Application April 19, 1940, Serial No. 330,438

2 Claims.

My invention relates to improvements in electric terminals in which electric connection is made between insulated wire and the terminals without removing the insulation. Contact is effected between insulated wires and terminals by crushing, piercing or impaling the insulation. The wire is pressed against the terminal, which terminal contains sharp prongs at its end or about a terminal screw, rivet, nail, eyelet, washer or disc, which said terminal screw, rivet, nail, eyelet, washer, or disc has sharp prongs to crush or pierce the insulation and thus make contact.

As will be apparent from the disclosures in my prior patents, #2-,053,060 for Attachment plug and #1,991,045 for Electric plug for improvements in piercing insulated wires in such devices an essential feature in such piercing is that it be accomplished by a permanent and stable piercing terminal which is simple in construction and inexpensive to manufacture and which can be operated by anyone whether skilled or unskilled in the art of electrical equipment. Other essential features are that such improvements can be used in connection with a terminal box, socket, receptacle, attachment plug, portable appliances such as vacuum cleaners, toasters, and the like in which the terminal connection is subject to constant tugging, pulling or vibration, switch board or tumbler board or any other type of electrical connections.

It should be pointed out that the pressure of the insulated wire against the terminal has a function in maintaining a pressure upon the threads of the terminal screw to eliminate the tendency of the screw coming loose under vibration, wear, expansion or contraction. Play between the threads of the screw and the threads into which it is screwed is eliminated in my device. The resiliency of the insulation material gives the desired pressure to press the terminal against the screw head to maintain frictional contact between the engaging threads.

It is a simplified type ,of-construction, inexpensive to manufacture and easy to use. Its mm and diversified uses are too numerous to mention and its simplicity lends to its general usefulness. Some of its forms and uses are disclosed in the following drawing to which reference is made; however applicant does not confine his invention to those disclosed as many other uses and purposes not disclosed in said drawing are possible.

Figure .1 is a clamping screw arrangement.

Figure 2 is bottom view of the piercing washwasher shown in Figure 1.

Reading on Figure 1 is a clamping screw arrangement and consists of the following parts: I9 is screw head, H0 is shank portion of screw, I l I rolled out thread portion of screw, H2 piercing washer, H3 contact prongs, H4 locking ribs. In Figure 1, the unthreaded portion H0 of the screw shank directly below the head portion I09 of the screw is smaller in diameter than the threaded portion Ill. The portion H0 of the shank provides an annular groove or recess in which the washer H2 is free to rotate. The rolled out threads I ll hold the washer from sliding down the screw shank.

Figure 2 is bottom view of the piercing washer 2, shown in Figure 1 I claim:

1. A clamping screw arrangement comprising a headed screw having a. threaded shank, a washer with contact prongs tapered for piercing insulation on an insulated conductor wire and making electrical contact with the conductor when the shank is screwed into a cooperating member, said washer being rotatable on the screw shank and being non-separable therefrom.

2. A clamping screw arrangement comprising a headed screw having a. threaded shank, a washer with contact prongs tapered to a point to pierce the insulation of an insulated conductor wire and make electrical contact with the condu'ctor when the shank is screwed into a cooperating member, said washer being rotatable on the screw shank and being non-separable therefrom.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2525123 *Aug 5, 1947Oct 10, 1950Louis FrankElectric wire connecting clamp
US2537061 *Feb 23, 1949Jan 9, 1951Wilbur M KohringResistance unit
US2648051 *Dec 16, 1950Aug 4, 1953Breeze CorpBattery terminal connector
US2654857 *Oct 27, 1949Oct 6, 1953Julius FinkelAntenna accessory
US2682647 *Apr 28, 1951Jun 29, 1954Smith Theodore CAttachment plug cap
US2687517 *Mar 30, 1951Aug 24, 1954Pass & Seymour IncWire terminal or connector
US2779376 *May 4, 1955Jan 29, 1957Illinois Tool WorksFastener having folded, split-ring helical lock washer retained thereon
US2875663 *Jul 1, 1954Mar 3, 1959Illinois Tool WorksThreadless stud adapted for insertion in keyhole slot
US2946039 *Nov 6, 1957Jul 19, 1960Durakool IncElectrical terminal
US2981921 *Nov 3, 1958Apr 25, 1961Arcoa IncConnector for connecting a branch wire to a current conducting through wire
US3065442 *May 27, 1959Nov 20, 1962Hubbell Inc HarveyWire terminal clamp for electric wiring devices
US3177456 *Jan 21, 1963Apr 6, 1965Allen Bradley CoWire clamp assembly
US3258733 *Apr 8, 1963Jun 28, 1966 Wire connector
US3263728 *Feb 20, 1964Aug 2, 1966Republic Ind CorpCaptive bolt
US3967875 *Mar 10, 1975Jul 6, 1976Textron, Inc.Captive fastener and captive washer assembly
US4149767 *Apr 3, 1978Apr 17, 1979Northern Telecom LimitedSelf-shearing connector for electrical conductors
US5173060 *Jun 12, 1990Dec 22, 1992Raychem CorporationTelecommunications terminal block or adapter
US6106077 *Aug 21, 1997Aug 22, 2000Dr. Ing. H.C.F. Porsche AgWheel bolt
US7198445 *Jun 3, 2005Apr 3, 2007Fan Disc CorporationWasher with crush zone
US8070404 *Apr 21, 2009Dec 6, 2011Middle Atlantic Products, Inc.Bonding fastener assembly for electrical grounding
US20130039719 *Aug 9, 2011Feb 14, 2013David L. KatzTake down nail/screw
DE1212609B *Sep 28, 1962Mar 17, 1966Siemens AgKlemme fuer vorzugsweise mit Kunststoff isolierte elektrische Leiter
DE1489552B *Sep 2, 1963Oct 15, 1970Trilux Lenze Gmbh & Co KgLeuchte mit Zahnunterlegscheibe
U.S. Classification439/412, 24/135.00R, 411/371.2, 411/368, 411/999, 411/259, 411/959
International ClassificationH01R4/24, H01R4/34
Cooperative ClassificationH01R4/34, H01R4/2479, Y10S411/999, Y10S411/959
European ClassificationH01R4/24D1, H01R4/34