US896210A - Contact member. - Google Patents

Contact member. Download PDF

Info

Publication number
US896210A
US896210A US31722906A US1906317229A US896210A US 896210 A US896210 A US 896210A US 31722906 A US31722906 A US 31722906A US 1906317229 A US1906317229 A US 1906317229A US 896210 A US896210 A US 896210A
Authority
US
United States
Prior art keywords
plug
contact
recess
contact member
sleeve
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
US31722906A
Inventor
Henry D James
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing 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 Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US31722906A priority Critical patent/US896210A/en
Application granted granted Critical
Publication of US896210A publication Critical patent/US896210A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12Auxiliary contacts on to which the arc is transferred from the main contacts

Description

H. 1). JAMES.
CONTACT MEMBER.
APPLICATION FILED MAY 16, 1906.
INVENTOR WITNESSES:
' 'PATENTED AUG. 18, 1908.
UNITED sTATEs PA rENT OFFICE HENRY D. JAMES,,OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.
CONTACT MEMBER.
Specification of Letters Patent.
Patented Aug. 18, 1908.
' T 0 all whom it may concern:
Be it known that I, HENRY D. JAMES, a citizen of the United States, and a resident of Pittsburg, in' the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Contact Members, of which the following is a specification.
My invention relates to contact members for switching devices and it hasfor its object to provide improved cooperating contact members which may be traversed, without injury, by relatively large values of electrical current and which shall maintain an excellent contact between the engaging parts in its closed position after having been utilized forefl'ecting a great number of circuit interruptions.
Contact members for switching devices have usually been provided with arcing contact members, which finally interrupt the controlled circuit and which are-distinct from the normal current-carrying parts, in order to avoid the deterioration of the latter which would otherwise result from the action of the electric arcs. A well known form of contact device comprises a stationary memberhaving a resilient cup-shaped terminal and a yieldingly mounted center plug, which serves as an arcing contact and a movable member of conical shape which first engages the arcing contact plug of the stationary member and finally makes electrical contact with the inner surface of the resilient cup. After an arrangement of this kind has been subjected to a large number of circuit interruptions, the end of the conical member which comes into contact with the arcing plug becomes seriously burned and the surface of the cone, which should engage the entire inner surface of the cup, becomes corroded or covered with slag, so that the resilient terminal is forced away and a poor contact between the two members results. When this stage is reached, the contacts are soon destroyed or become useless, since arcing and burning continue even when the switch is closed. In order to obviate the aforesaid objections I provide a cylindrical recess in its upper surface in which a detachable plug of considerably less cross-section than that of the recess, is located. This detachable plug cooperates with the yielding center plug of the stationary member so that arcs which occur upon interruption of the circuit affect only the engaging ends of these two plugs, and since these plugs are detachable, they may be replaced from time to time, and the current--carrying contact members will always be maintained in good condition.
The single figure of the accompanying drawing is a longitudinal section of a pair of cooperating contact members, constructed in accordance with my invention.
Referring to thedrawing, a stationary contact member 1 comprises a stud 2, which may pass through a square hole in an insulating plate 3 or be otherwise suitably supported, a sleeve 4 which is screw-threaded onto the lower end of stud 2, and a plurality of flexible contact fingers, or blades 5, which are so attached tothe sleeve 4 as to form a resilient cup 6. The end of the stud 2, which is opposite the sleeve 4, is provided with an enlargement 7 so that the stationary contact member may be clamped to the insulating plate 3 that is located between one end of the sleeve 4 and this enlargement. The enlargement 7 is screw-threaded to re ceive acap 8, its upper end being drilled to fit a terminal 9, which may be soldered or otherwise attached to a suitable conducting lead. The stud 2 is provided with a recess 10 which receives one end' of a center plug 11. The center plug 11, which is provided with a collar or enlargement 12, is located within the sleeve 4 and one extremity projects through a bushing 13, which is screwthreaded into the sleeve 4. The center plug 11 is free to slide within the sleeve and is held at one extremity of its motion by a spring 14 which is interposed between the collar -12 and one end of the stud 2. In order to insure a good electrical contact between the center plug and the-sleeve 4, a resilient contact sleeve 15 is attached to the collar 12 and engages the inner'surface of the sleeve 4. 1
A movable contact member 16, which is adapted to cooperate with the stationary member 1, comprises a current-carrying contact member 17, in the form of a frustum of a cone that is rovided with a recess 18 and a detachable p ug 19 which is located in the center of the recess. The plug 19 is adapted to first complete the circuit by engaging the extremity of the center plug 11 and is attached to the conical member --17 by a nut 20, and a screw-threaded bolt projection 21 that extends through a small hole 22 in the cup-shape the members, of course, may be interc center of the cone into a tubular opening 23 of lar er diameter.
tive motion between two being essential.
I claim as my invention:
1. In a switching device, the combination with a contact member having an end recess, and a projecting plug of materially smaller section located in the recess, of a cooperating contact member having a projecting plug the end of which engages the end of the first-named plug, one of said plugs being yieldingly supported to permit the main con tact surfaces to make engagement witheach other.
2. In a switching device, the combination with a contact member having a frusto-conical outer surface, a cylindrical end recess, and a lug projecting from the center of the recess, 0 a cooperating contact member having a longitudinally yielding plug the end of which engages the end of the other plug.
3. The combination with a frusto-conical contact member having a cylindrical end r e cess, and a plug projecting from the center of the recess, of a cooperating contact member having laterally yielding fin ers to engage the frusto-conical surface 0' the other contact member, and a longitudinally yielding plug the end of which engages the end of the other plug.
4. The combination with a frusto-conical contact member having a cylindrical recess, and a plug cprojecting therefrom, of a resilient cooperating contact member having a yielding plug to engage the first-named p 5. A switching device comprising a tubular member having resilient fingers attached thereto and bent inwardly to forma cup, an arcing contact plug rojecting from the end of the tubular mem er, and a cooperating frusto-conical member having a recess, and a plug projecting therefrom to cooperate with the arcing .contact plug. v
6. In a switching device, the combination with a tubular member having resilient fingers attached thereto to form a cup, an arcing contact plug projecting from the cen ter of the cup, and aresilient sleeve between the plug and the inside Walls of the tube, of a cooperating frusto-conical member having a recess, and a lug supported in the center of the recess and 'adapted to engage the arcing contact plug.
7. In a switching device, the combination with a tubular member, resilient fingers attached thereto to form a cup or socket, a longitudinally movable arcing contact plug partially located in the tubular member and projecting therefrom, a resilient sleeve interposed between the plug and the inner walls of the tube, and a spring surrounding the plug, of a cooperating frusto-conical member having a recess, and a plug projecting from the recess to engage the arcing contact plug.
In testimony whereof, I have hereunto subscribed my name this 10th day of May, 1906.
HENRY D. JAMES.
US31722906A 1906-05-16 1906-05-16 Contact member. Expired - Lifetime US896210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US31722906A US896210A (en) 1906-05-16 1906-05-16 Contact member.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US31722906A US896210A (en) 1906-05-16 1906-05-16 Contact member.

Publications (1)

Publication Number Publication Date
US896210A true US896210A (en) 1908-08-18

Family

ID=2964637

Family Applications (1)

Application Number Title Priority Date Filing Date
US31722906A Expired - Lifetime US896210A (en) 1906-05-16 1906-05-16 Contact member.

Country Status (1)

Country Link
US (1) US896210A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426387A (en) * 1944-04-04 1947-08-26 Ite Circuit Breaker Ltd Circuit breaker contact
US2455998A (en) * 1943-12-20 1948-12-14 Electrical Eng Equipment Co Electrical load breaking device
US2499420A (en) * 1946-02-19 1950-03-07 Michael J Sakatos Nonsparking switch
US2549350A (en) * 1944-09-14 1951-04-17 Westinghouse Electric Corp Circuit interrupter
US2615951A (en) * 1950-05-12 1952-10-28 American Phenolic Corp Spring loaded action contact
US2724096A (en) * 1952-12-04 1955-11-15 American Phenolic Corp Spring loaded butt contact with internal contacting sleeve
US2728062A (en) * 1952-12-04 1955-12-20 American Phenolic Corp Spring loaded butt contact with external contacting sleeve
US2811613A (en) * 1953-06-17 1957-10-29 Merlin Gerin Protecting device for end-on-end contact tubes in circuit breakers
US3474380A (en) * 1968-02-19 1969-10-21 Edwin A Miller Electrical connectors
US3691511A (en) * 1970-10-05 1972-09-12 Bunker Ramo Plug connection contact with high security against burning off
US3716817A (en) * 1971-04-21 1973-02-13 Mc Donnell Douglas Corp Electrical connectors
US4591680A (en) * 1983-11-11 1986-05-27 Bbc Brown, Boveri & Co., Ltd. Isolating switch

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455998A (en) * 1943-12-20 1948-12-14 Electrical Eng Equipment Co Electrical load breaking device
US2426387A (en) * 1944-04-04 1947-08-26 Ite Circuit Breaker Ltd Circuit breaker contact
US2549350A (en) * 1944-09-14 1951-04-17 Westinghouse Electric Corp Circuit interrupter
US2499420A (en) * 1946-02-19 1950-03-07 Michael J Sakatos Nonsparking switch
US2615951A (en) * 1950-05-12 1952-10-28 American Phenolic Corp Spring loaded action contact
US2724096A (en) * 1952-12-04 1955-11-15 American Phenolic Corp Spring loaded butt contact with internal contacting sleeve
US2728062A (en) * 1952-12-04 1955-12-20 American Phenolic Corp Spring loaded butt contact with external contacting sleeve
US2811613A (en) * 1953-06-17 1957-10-29 Merlin Gerin Protecting device for end-on-end contact tubes in circuit breakers
US3474380A (en) * 1968-02-19 1969-10-21 Edwin A Miller Electrical connectors
US3691511A (en) * 1970-10-05 1972-09-12 Bunker Ramo Plug connection contact with high security against burning off
US3716817A (en) * 1971-04-21 1973-02-13 Mc Donnell Douglas Corp Electrical connectors
US4591680A (en) * 1983-11-11 1986-05-27 Bbc Brown, Boveri & Co., Ltd. Isolating switch

Similar Documents

Publication Publication Date Title
US896210A (en) Contact member.
US2123631A (en) Electrical connecter
US645984A (en) Electrical switch.
US2179636A (en) Electrical connector
US2196964A (en) Insulated live line tap-off connector
US2316470A (en) Switch construction
US2844672A (en) Electric outlet socket and plug
US2031296A (en) Disconnect plug and receptacle
US3259726A (en) Telescoping type circuit breaker having isolator contact with arc snuffing means
US802736A (en) Electric fuse.
US840819A (en) Switch-contact for controllers and the like.
US975431A (en) Electric-circuit interrupter.
US1564818A (en) Switch
US1317203A (en) Contact-terminal
US1697934A (en) Combined electric fuse and switch
US995772A (en) Incandescent-electric-lamp socke.
US449282A (en) Electric switch
US981821A (en) Contact member for electric switching devices.
US1103244A (en) Separable attachment-plug.
US1923450A (en) Push button switch construction
US751029A (en) Lamp-socket
US1049371A (en) Cut-out switch.
US1776275A (en) Electrical connecter
US874293A (en) Circuit-breaker.
US1012806A (en) Electric switch.