Patent US4951912A successfully refreshed from Google Patents.
Patent US3764761A successfully refreshed from Google Patents.
US3764761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instantaneous switch
Assignee: Individual
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Filing: 1971-11-12
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Granted: 1973-10-09
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Expires: 1991-11-12
Abstract
Abstract The invention relates to switches used in the automatic drive control of hoisting and conveying plant, machine-tools and other industrial equipment and, more specifically, to instantaneous switches used as limit switches. The instantaneous switch contains fixed contacts, fastened to the base, movable contacts, an operating element, two levers and two spiral springs. The ends of the levers are connected to the ends of the springs and bear against the fixed limit stops made fast to the base. The free ends of the levers are hinged and carry movable contacts. The operating element is jacked up by an opposing spring placed in a sleeve fastened to the base. The movable contacts of the switch, built into the base, are protected by a cover fastened to the base with pipes.
Inventors
- 👤 A Poltorak
- 👤 S Nedosekov
- 👤 J Sameljuk
- 👤 O Vorontsov
- 👤 N Sashkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:39
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/26; H01H13/28; H01H13/285
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
An instantaneous switch comprising a base, fixed contacts secured to said base, mating movable contacts for selective contact with the fixed contacts, an actuator means for effecting selective contact of the movable contacts with the fixed contacts and means for throwing over the movable contacts to end positions in which they make selective contact with the fixed contacts, said means including at least two units symmetrically located with respect to said actuator and operatively coupled therewith, each unit including at least one spring member having opposite ends, a lever having opposite ends, the levers and the spring members of the units being symmetrically disposed with respect to the actuator, the levers and spring members having respective ends remote from the actuator which are coupled together, and fixed limiters secured to the base, said levers bearing against the limiters at the ends thereof where the levers are connected to the spring members, the other ends of the spring members and levers constituting free ends of the units, some of said free ends being connected to the actuator, the other of said free ends being located at a distance from each other which is less than the distance between said limiters and being hinged together and carrying said movable contacts.
Claim 2
Dependent Claim
208 words
An instantaneous switch comprising a base, fixed contacts secured to said base, mating movable contacts for selective contact with the fixed contacts, an actuator means for effecting selective contact of the movable contacts with the fixed contacts and means for throwing over the movable contacts to end positions in which they make selective contact with the fixed contacts, said means including at least two units symmetrically located with respect to said actuator and operatively coupled therewith, each unit including at least one spring member having opposite ends, a lever having opposite ends, the levers and the spring members of the units being symmetrically disposed with respect to the actuator, the levers and spring members having respective ends remote from the actuator which are coupled together, and fixed limiters secured to the base, said levers bearing against the limiters at the ends thereof where the levers are connected to the spring members, the other ends of the spring members and levers constituting free ends of the units, some of said free ends being connected to the actuator, the other of said free ends being located at a distance from each other which is less than the distance between said limiters and being hinged together and carrying said movable contacts.
Claim 3
Dependent Claim
57 words
An instantaneous switch as claimed in claim 1 wherein the levers and spring members have inner ends closer to the actuator and outer ends further away from the actuator, the other of said free ends being the inner ends of the levers, the free ends connected to the actuator being the inner ends of the spring members.
Claim 4
Dependent Claim
16 words
An instantaneous switch as claimed in claim 1 wherein: said units are combined with one another.
Claim 5
Dependent Claim
52 words
An instantaneous switch as claimed in claim 1 wherein each said unit is in the form of a single elastic plate the outer portions of which are bent lengthwise and the inner portions have the shape of two tongues, the other portions being the spring members, the inner portions being said tongues.
References Cited (Backward Citations)
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Cited
US2412119A
Cited
US2472333A
Cited
US2629791A
Cited
GB730991A
Cited
US2791656A
Cited
US3017471A
Cited
FR1342806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |