US3855558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact attachment
Assignee: Cutler Hammer Inc
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Filing: 1974-04-11
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Granted: 1974-12-17
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Expires: 1994-04-11
Abstract
Abstract An electrical contact unit for attachment to an electromagnetically operated switch comprising a housing divided into two parts each having depending therefrom a leg with a hooked end for engagement of the contact unit with a complementary formation on the switch. The two housing parts are held together by resilient coupling means permitting partial separation of the housing parts against the resilience of the coupling means whereby the contact unit is snap-engageable with the complementary formation on the switch. The contact unit includes relatively movable contact members which are operated by an operating member which couples with an operating member in the switch.
Inventors
- 👤 W Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:21
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/541; H01H50/545
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
An electrical contact unit for attachment to an electromagnetically operated switch, said contact unit comprising: a. a housing divided into parts; b. at least one leg depending from each housing part; c. a hooked end formed on each leg, for engagement of the contact unit with a complementary formation on the switch; d. resilient means holding the two housing parts together and permitting partial separation of the two housing parts against the resilience of said means whereby the contact unit is snapengageable with said complementary formation; e. relatively movable contact members in the housing; and f. an operating member for said contact members.
Claim 2
Dependent Claim
103 words
An electrical contact unit for attachment to an electromagnetically operated switch, said contact unit comprising: a. a housing divided into parts; b. at least one leg depending from each housing part; c. a hooked end formed on each leg, for engagement of the contact unit with a complementary formation on the switch; d. resilient means holding the two housing parts together and permitting partial separation of the two housing parts against the resilience of said means whereby the contact unit is snapengageable with said complementary formation; e. relatively movable contact members in the housing; and f. an operating member for said contact members.
Claim 3
Dependent Claim
45 words
An electrical contact unit as claimed in claim 1, in which said resilient means comprises: a. an elongate member; b. an abutment on said elongate member; and c. a spring acting between said abutment and one housing part to hold said elongate member under tension.
Claim 4
Dependent Claim
35 words
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.
Claim 5
Dependent Claim
25 words
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.
Claim 6
Dependent Claim
29 words
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.
Claim 7
Dependent Claim
17 words
An electrical contact unit as claimed in claim 1, in which the two housing parts are identical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |