Patent US3681733A successfully refreshed from Google Patents.
US3681733A
Expired / Lapsed
US
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Contactless push-button type switching apparatus
Assignee: Denki Onkyo Co Ltd
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Filing: 1970-10-16
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Granted: 1972-08-01
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Expires: 1990-10-16
Abstract
Abstract A contactless push-button type switching apparatus comprised of a box type base with the opening facing upward, a push-button cap which caps the box type base so as to cover the opening, a closed magnetic path including an elastic yoke which is provided in the base to retain the push-button cap at the home position and at least one galvano-magnetro effect device which is arranged in the magnetic path so that the density of magnetic flux applied to the galvano-magnetro effect device varies with bending of the elastic yoke when the push-button cap is pressed down.
Inventors
- 👤 Noboru Masuda
- 👤 Tunekazu Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:21
CPC Classifications
H; H01; H01H; H01H36/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
168 words
A contactless push-button type switching apparatus comprised of a. a base made of non-magnetic material and having an opening facing upward; b. a push-button cap made of non-magnetic material which slides to cap the base so as to cover the opening; c. projection means extending downwardly towards the base from the inside of the push-button cap; d. a magnetic path comprising a magnet, a spring yoke having a free end and a fixed end which spring yoke free end is arranged to closely approach a fixed yoke in contact with said magnet and said spring yoke contacting the lower portion of the projection means and is arranged so that it remains at a home position when the push-button cap is not pressed and so that its free end moves when the push-button is pressed down; and e. at least one galvano-magnetro effect device arranged in the magnetic path so that the density of magnetic flux to which said device is exposed varies with movement of the spring yoke.
Claim 2
Dependent Claim
168 words
A contactless push-button type switching apparatus comprised of a. a base made of non-magnetic material and having an opening facing upward; b. a push-button cap made of non-magnetic material which slides to cap the base so as to cover the opening; c. projection means extending downwardly towards the base from the inside of the push-button cap; d. a magnetic path comprising a magnet, a spring yoke having a free end and a fixed end which spring yoke free end is arranged to closely approach a fixed yoke in contact with said magnet and said spring yoke contacting the lower portion of the projection means and is arranged so that it remains at a home position when the push-button cap is not pressed and so that its free end moves when the push-button is pressed down; and e. at least one galvano-magnetro effect device arranged in the magnetic path so that the density of magnetic flux to which said device is exposed varies with movement of the spring yoke.
Claim 3
Dependent Claim
26 words
A contactless push-button type switching apparatus, according to claim 1, wherein the projection means is made of magnetic material and forms part of the magnetic path.
Claim 4
Dependent Claim
77 words
A contactless push-button type switching apparatus, according to claim 2, wherein the magnet is fixed at the inside top of the push-button cap and wherein one magnetic pole of said magnet is coupled to the projection and the other magnetic pole is coupled to a fixed yoke, and the base poRtion of the spring yoke is fixed to said base in its opening so that the free end of said spring yoke can approach said fixed yoke.
Claim 5
Dependent Claim
43 words
A contactless push-button type switching apparatus, according to claim 1, wherein a fixed yoke is coupled to one magnetic pole of the magnet and a free end of the spring yoke is arranged to closely approach the internal surface of the fixed yoke.
Claim 6
Dependent Claim
76 words
A contactless push-button type switching apparatus, according to claim 4, wherein two galvano-magnetro effect devices are arranged at the internal surface of the fixed yoke so that one of said devices is positioned to be opposite to the free end of the spring yoke when the push-button cap is released and the other of said devices is positioned to be opposite to the free end of the spring yoke when the push-button cap is pressed down.
Claim 7
Dependent Claim
37 words
A contactless push-button type switching apparatus, according to claim 4, wherein the magnet is fixed in said base, and the base portion of the spring yoke is magnetically connected to the other magnetic pole of the magnet.
Claim 8
Dependent Claim
20 words
A contactless push-button type switching apparatus, according to claim 4, wherein the base portion of the spring yoke is coiled.
Claim 9
Dependent Claim
70 words
A contactless push-button type switching apparatus, according to claim 4, wherein the magnet is fixed in said base, a pair of fixed yokes are arranged on opposite sides of the magnetic poles of the magnet, and one of said fixed yokes serves as a fulcrum for the spring yoke and contacts the spring yoke, the free end of said spring yoke being positioned to closely approach the other fixed yoke.
References Cited (Backward Citations)
US3537046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |