US3855558A - Electrical contact attachment - Google Patents

Electrical contact attachment Download PDF

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Publication number
US3855558A
US3855558A US00460071A US46007174A US3855558A US 3855558 A US3855558 A US 3855558A US 00460071 A US00460071 A US 00460071A US 46007174 A US46007174 A US 46007174A US 3855558 A US3855558 A US 3855558A
Authority
US
United States
Prior art keywords
contact unit
switch
housing
electrical contact
operating member
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
US00460071A
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English (en)
Inventor
W Hayward
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.)
Cutler Hammer Inc
Original Assignee
Cutler Hammer Inc
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 Cutler Hammer Inc filed Critical Cutler Hammer Inc
Application granted granted Critical
Publication of US3855558A publication Critical patent/US3855558A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices
    • H01H50/545—Self-contained, easily replaceable microswitches

Definitions

  • An electrical contact unit for attachment to an elec- 3 f tromagnetically operated switch comprising a housing -[30] Foreign Application Priority Data divided into two parts each having depending there- 7 Apr. 18 1973 Great Britain-t... 18839/73 from a legwithv a hooked end for engagement of the contact unit withla complementary formation on the 52 us.
  • the 1 contact unit includes relatively movable contact mem- [56] k'eferenceslcited bers which are operated by an operating member UNITED STATES PATENTS which couples with an operating member .in the switch. 3.444.345 5/l969 Mackiewicz 200/303 X 5 3.639.866 6 Claims, 5 Drawing Figures after engagement.
  • ELECTRICAL CONTACT ATTACHMENT attachment to a contactor or other electromagnetically operated switch.
  • Sucha contact unit can be used for switching indicator or control apparatus, for example to provide an electrical interlock between two contactors.
  • Contact units are known which are snap-engageable with the electromagnetically operated switch. These contact units suffer from various disadvantages as regards ease of assembly, ease of snap-engagement with the switch and reliably'secure attachment to the switch An object of the present invention is to provide a contact unit which is free of these disadvantages.
  • the housing encloses a normally open pair of contact members, provided ,by stationary contact members 6, and a normally closed pair of contact members, provided by stationary contact members 7.
  • Respective bridging contact members 8 are carried by an operating member-9 and biased towards the respective stationary contacts by springs 11.
  • the stationary contact members 6 and 7 are securedon the housing by respective terminal screws and conductor clamps shown at 12, which also provide terminals for reception of lead conductors (not shown).
  • the operating member 9 is located .by the two housing parts 1, is slidable up and down (as shown in FIGS. 2 and 3) and is engageable at the two housing parts against the resilience of said coupling means whereby the contact unit is snapengageable with said. complementary formation, relatively movable contact members in the housing and an operating member for said contact members.
  • FIGS. 3, 4 and 5 are sectional viewson the lines AA, 8-8 and C-C respectively.
  • FIG. 3 shows the contact unit actually attached to such a switch.
  • the contact unit 10 comprises a housing dividedinto two identical parts 1, held together by a resilient coupling means or coupling 2, 3, 4.
  • a flat head pin 2 of a kind commonly used for rivetting, passes through apertures la in the two housing parts andthe free end of the pin is secured by a push fitting resilient clip 3 of the kind commonly known as a spire clip.
  • a similar but larger sized clip 4 is provided between the head of the pin 2 and the adjacent housing part 1 to provide resilience in the coupling of thetwo parts and is chosen too large to grip the stem of the pin.
  • the clip 4 may be replaced by a leaf or helical spring.
  • the resilient coupling permits partial separation of the two housing parts 1 against the resilience of the clip 4.
  • Each housing part is formed with two depending legs 5 each formed with a hooked end for engagement of the contact unit with a complementary formation 22 on the switch 20. Because the resilient coupling of the two housing parts permits partial separation thereof, the
  • the two parts 1 of the housing, with the stationary contacts 6 and 7 mounted thereon, are first assembled round the contact unit operating member 9.
  • the pin 2, with the resilient element 4 on it, is then inserted through the two parts 1 and the clip 3 pushed on to the free end of the pin 2 to secure the housing parts together.
  • the contact unit is'then clippedonto the switch 20, the opeating member 9 of the contact unit being connected to the switch operating member 24, and the depending legs 5 on the housing parts 1 snap-engaging the complementary formation 22 on the switch, the clip 4 providing the necessary resilience.
  • An electrical contact unit for attachment to an electromagnetically operated switch said contact unit comprising: i
  • An electrical contact unit as claimed in claim 1, comprising means in which said operating member is mounted for reciprocal sliding movement in the direction of snap-engagement of the contact unit with said complementary formation.
  • An electrical contact unit as claimed in claim 3, comprising means formed on said operating member and engageable with an operating member in said switch.
  • An electrical contact unit as claimed in claim 1, comprising at least one pair of contact members and a bridging contact member for bridging said pair of contact members.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US00460071A 1973-04-18 1974-04-11 Electrical contact attachment Expired - Lifetime US3855558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1883973 1973-04-18

Publications (1)

Publication Number Publication Date
US3855558A true US3855558A (en) 1974-12-17

Family

ID=10119293

Family Applications (1)

Application Number Title Priority Date Filing Date
US00460071A Expired - Lifetime US3855558A (en) 1973-04-18 1974-04-11 Electrical contact attachment

Country Status (9)

Country Link
US (1) US3855558A (it)
BE (1) BE813674A (it)
CA (1) CA1008116A (it)
DE (1) DE2418541A1 (it)
ES (1) ES425344A1 (it)
FR (1) FR2226742A1 (it)
IN (1) IN138781B (it)
IT (1) IT1015923B (it)
NL (1) NL7405209A (it)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032735A (en) * 1974-08-29 1977-06-28 Cutler-Hammer, Inc. Contact unit
US4117290A (en) * 1977-12-15 1978-09-26 Gould Inc. Stationary contact combination
US4121076A (en) * 1976-01-28 1978-10-17 Westinghouse Electric Corp. Convertible switch
US4139754A (en) * 1976-10-18 1979-02-13 I-T-E Imperial Corporation Stationary contact combination
US4233479A (en) * 1978-04-10 1980-11-11 Mannesmann Demag Ag Switch
US4277662A (en) * 1980-06-03 1981-07-07 Cherry Electrical Products Corp. Switch blade with wiping contact action
US4504713A (en) * 1983-07-13 1985-03-12 Adams Elevator Equipment Company Push button electrical switch assembly
US4650945A (en) * 1982-07-26 1987-03-17 Emhart Industries, Inc. Four terminal switch
US4695691A (en) * 1985-01-14 1987-09-22 Aktieselskabet Laur.Knudsen Nordisk Elektricitets Selskab Switch housing having fixed external nuts for attachment of contacts and terminals
US5145057A (en) * 1989-04-20 1992-09-08 Fuji Electric Corporation, Ltd. Auxiliary contact unit for an electromagnetic switch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444345A (en) * 1967-06-29 1969-05-13 Hubbell Inc Harvey Electrical wiring device with positive locking cover
US3639866A (en) * 1970-10-12 1972-02-01 Honeywell Inc Constant actuating force arrangement for a relay and a relay-adder combination
US3648203A (en) * 1970-08-26 1972-03-07 Honeywell Inc Relay switch housing
US3676628A (en) * 1970-08-05 1972-07-11 Honeywell Inc Reversible moving contact arrangement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444345A (en) * 1967-06-29 1969-05-13 Hubbell Inc Harvey Electrical wiring device with positive locking cover
US3676628A (en) * 1970-08-05 1972-07-11 Honeywell Inc Reversible moving contact arrangement
US3648203A (en) * 1970-08-26 1972-03-07 Honeywell Inc Relay switch housing
US3639866A (en) * 1970-10-12 1972-02-01 Honeywell Inc Constant actuating force arrangement for a relay and a relay-adder combination

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032735A (en) * 1974-08-29 1977-06-28 Cutler-Hammer, Inc. Contact unit
US4121076A (en) * 1976-01-28 1978-10-17 Westinghouse Electric Corp. Convertible switch
US4139754A (en) * 1976-10-18 1979-02-13 I-T-E Imperial Corporation Stationary contact combination
US4117290A (en) * 1977-12-15 1978-09-26 Gould Inc. Stationary contact combination
US4233479A (en) * 1978-04-10 1980-11-11 Mannesmann Demag Ag Switch
US4277662A (en) * 1980-06-03 1981-07-07 Cherry Electrical Products Corp. Switch blade with wiping contact action
US4650945A (en) * 1982-07-26 1987-03-17 Emhart Industries, Inc. Four terminal switch
US4504713A (en) * 1983-07-13 1985-03-12 Adams Elevator Equipment Company Push button electrical switch assembly
US4695691A (en) * 1985-01-14 1987-09-22 Aktieselskabet Laur.Knudsen Nordisk Elektricitets Selskab Switch housing having fixed external nuts for attachment of contacts and terminals
US5145057A (en) * 1989-04-20 1992-09-08 Fuji Electric Corporation, Ltd. Auxiliary contact unit for an electromagnetic switch

Also Published As

Publication number Publication date
NL7405209A (it) 1974-10-22
IN138781B (it) 1976-03-27
CA1008116A (en) 1977-04-05
IT1015923B (it) 1977-05-20
DE2418541A1 (de) 1974-11-14
BE813674A (fr) 1974-10-14
ES425344A1 (es) 1976-06-01
FR2226742A1 (it) 1974-11-15

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