Patent US4767943A successfully refreshed from Google Patents.
US4767943A
Expired / Lapsed
US
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Switch arrangement
Assignee: Maquet GmbH
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Filing: 1987-01-07
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Granted: 1988-08-30
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Expires: 2007-01-07
Abstract
Abstract In a switch arrangement for switching electrical functions with at least two switches (A;B) having electrical contact elements (8;9;10;11), at least one of the switches (A;B) is made as a foil switch having a flexible base foil (4;7) carrying one contact element (9;11) and a switch element (2;5), particularly a switch foil, elastically deflectable in the direction toward the base foil and carrying the opposite contact element (8;10). The other switch (B) is so arranged behind the foil switch (A) in the keying direction that it is operable by an operating pressure on the foil switch (A) which exceeds the required operating pressure for the foil switch (A).
Inventors
- 👤 Bernhard Adler
- 👤 Hermann Kieferle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:22
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/78; H01H13/807; H01H13/50; H01H13/64; H01H13/702; H01H2223/00; H01H2223/04; H01H2225/00; H01H2225/002; H01H2225/008; H01H2225/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A switch arrangement for switching electrical functions with at least two switches having electrical contact elements, said switch arrangement comprising a first switch having a flexible base foil carrying a first contact element and also having a switch foil carrying a second contact element, said switch foil being elastically deflectable toward said base foil to bring said first and second contact elements into engagement with one another, and a second switch arranged behind said base foil of said first switch in the keying direction so that said second switch is operable by an operating pressure on said switch foil of said first switch which exceeds the pressure necessary to bring said first and second contact elements of said first switch into engagement, first and second conductors, said first switch being connected in said first conductor to open and close said first conductor and said second switch being connected in said second conductor to open and close said second conductor, and an AND-gate having two input terminals, said first conductor being connected to one of said input terminals and said second conductor being connected to the other of said input terminals.
Claim 2
Dependent Claim
190 words
A switch arrangement for switching electrical functions with at least two switches having electrical contact elements, said switch arrangement comprising a first switch having a flexible base foil carrying a first contact element and also having a switch foil carrying a second contact element, said switch foil being elastically deflectable toward said base foil to bring said first and second contact elements into engagement with one another, and a second switch arranged behind said base foil of said first switch in the keying direction so that said second switch is operable by an operating pressure on said switch foil of said first switch which exceeds the pressure necessary to bring said first and second contact elements of said first switch into engagement, first and second conductors, said first switch being connected in said first conductor to open and close said first conductor and said second switch being connected in said second conductor to open and close said second conductor, and an AND-gate having two input terminals, said first conductor being connected to one of said input terminals and said second conductor being connected to the other of said input terminals.
References Cited (Backward Citations)
US3917917A
Cited
US4349712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |