US3636370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact-free pushbutton switching device
Assignee: Siemens AG
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Filing: 1970-03-27
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Granted: 1972-01-18
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Expires: 1990-03-27
Abstract
Abstract A permanent magnet having a pole shoe is affixed to a moving device for moving the magnet in directions transverse to the axis of magnetization of the magnet and into and out of close proximity with a galvanomagnetic resistance affixed to an iron yoke.
Inventors
- 👤 Konrad Samberger
- 👤 Ulrich Hruschka
- 👤 Karl Greger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/97
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
38 words
A contact-free switching device as claimed in claim 1, wherein said moving means comprises a pushbutton and a tappet in abutment with said pushbutton, said tappet comprising insulating material and supporting said magnet and extending into said yoke.
Claim 2
Dependent Claim
66 words
A contact-free switching device as claimed in claim 2, wherein said yoke has a flat side and a guide recess formed therein and open toward said flat side to accommodate the tappet of said moving means, and further comprising a plate of synthetic material provided at the flat side of said yoke and guiding said tappet in its movement, and amplifier means mounted on said plate.
Claim 3
Dependent Claim
29 words
A contact-free switching device as claimed in claim 2, wherein the tappet of said moving means has an opening formed therein and said magnet is held in said opening.
Claim 4
Dependent Claim
41 words
A contact-free switching device as claimed in claim 3, further comprising a housing enclosing said switching device, said housing having a cover portion, electrically connective plugs supported by said cover portion and extending from the amplifier means mounted on said plate.
Claim 5
Dependent Claim
54 words
A contact-free switching device as claimed in claim 3, further comprising a bracket mounted on the end of the tappet of said moving means abutting said pushbutton and abutting said pushbutton and a spring on said tappet and abutting at one end against said bracket and abutting at its other end against said yoke.
Claim 6
Dependent Claim
63 words
A contact-free switching device as claimed in claim 6, wherein the pushbutton is separate from the tappet of said moving means and has an inside surface abutting said bracket under the pressure of said spring, and further comprising a housing enclosing said switching device, said housing having protrusions formed therein, and inserts supporting said pushbutton in said housing and extending behind said protrusions.
Claim 7
Dependent Claim
30 words
A contact-free switching device as claimed in claim 6, wherein said spring abuts at said one end directly against said pusHbutton and abuts at said other end against said yoke.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |