Patent US3842230A successfully refreshed from Google Patents.
US3842230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pushbutton switch with coil spring contact
Assignee: Casio Computer Co Ltd
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Filing: 1972-09-06
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Granted: 1974-10-15
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Expires: 1992-09-06
Abstract
Abstract A switching device comprising a first electrode mounted on the plain surface of an insulation plate and a second electrode formed on said plain surface of said insulation plate at a sufficient spacing from the first electrode to be insulated from said first electrode and with a different diameter from that of said first electrode. The electric connection of both electrodes is effected by keeping one end of a coil spring connected to either of said electrodes and compressing the other end of the coil spring upon depression of an actuator, so as to connect said other end of the coil spring to the other of the electrodes.
Inventors
- 👤 Y Kashio
- 👤 H Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:03
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/36; H01H1/40; H01H1/403; H01H1/14; H01H1/24; H01H1/242; H04; H04M; H04M1/00; H04M1/02; H04M1/23
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
237 words
A switching device comprising: an insulation substrate having a nearly plain first surface; a first nearly plain electrode mounted on said first surface of said insulation substrate; a second nearly plain electrode mounted on said first surface of said insulation substrate and around said first electrode at a specified distance from the first electrode; a first leadout means coupled to and leading out the first electrode from the surface of the insulation substrate opposite said first surface, said first leadout means extending through said insulation substrate; a second leadout means on said first surface of said insulation substrate coupled to and leading out the second electrode from said first surface of said insulation substrate; a coil spring made of a conductive material having one end always in contact with one of the first and the second electrodes and the other end spaced from the remaining electrode when not depressed and in contact with the remaining electrode when depressed so as to electrically connected both electrodes when said coil spring is depressed; an actuator coupled to said coil spring to depress said other end of said coil spring so as to cause said coil spring to electrically connect the first and the second electrodes when depressed and to be spaced from said one of the electrodes when released; and a frame carrying said actuator and defining a linear stroke of said actuator to selectively depress said coil spring.
Claim 2
Dependent Claim
237 words
A switching device comprising: an insulation substrate having a nearly plain first surface; a first nearly plain electrode mounted on said first surface of said insulation substrate; a second nearly plain electrode mounted on said first surface of said insulation substrate and around said first electrode at a specified distance from the first electrode; a first leadout means coupled to and leading out the first electrode from the surface of the insulation substrate opposite said first surface, said first leadout means extending through said insulation substrate; a second leadout means on said first surface of said insulation substrate coupled to and leading out the second electrode from said first surface of said insulation substrate; a coil spring made of a conductive material having one end always in contact with one of the first and the second electrodes and the other end spaced from the remaining electrode when not depressed and in contact with the remaining electrode when depressed so as to electrically connected both electrodes when said coil spring is depressed; an actuator coupled to said coil spring to depress said other end of said coil spring so as to cause said coil spring to electrically connect the first and the second electrodes when depressed and to be spaced from said one of the electrodes when released; and a frame carrying said actuator and defining a linear stroke of said actuator to selectively depress said coil spring.
Claim 3
Dependent Claim
27 words
A switching device according to claim 1 comprising a plurality of said first electrodes, second electrodes, leadout means, coil springs and actuators associated with said insulation substrate.
Claim 4
Dependent Claim
18 words
A switching device according to claim 2 wherein said second leadout means are coupled to a common terminal.
Claim 5
Dependent Claim
17 words
A switching device according to claim 2 wherein said first leadout means are each coupled to terminals.
Claim 6
Dependent Claim
23 words
A switching device according to claim 2 wherein said one end of said coil springs are kept abutting against a respective second electrode.
Claim 7
Dependent Claim
14 words
A switching device according to claim 1 wherein said first electrode is generally disc-shaped.
Claim 8
Dependent Claim
22 words
A switching device according to claim 6 wherein said second electrode is generally ring-shaped and is concentric with said disc-shaped first electrode.
Claim 9
Dependent Claim
17 words
A switching device according to claim 2 wherein said actuator is slidably mounted in said frame member.
Claim 10
Dependent Claim
16 words
A switching device according to claim 1 wherein said first and second electrodes are substantially coplanar.
Claim 11
Dependent Claim
21 words
A switching device according to claim 1 wherein said second electrodes are substantially concentric with respective ones of said first electrodes.
Claim 12
Dependent Claim
148 words
A switching device comprising: an insulation substrate have a substantially plain surface; a plurality of first electrodes formed on said plain surface of said insulation substrate; a plurality of second electrodes extending from and integral with a conductive plate closely superposed on said insulation substrate and formed by cutting in a helical form those portions of said conductive plate which face said first electrodes and drawing out the helical sections thus cut into conical coil springs, said coil springs having their top ends electrically connected to respective first electrodes when said coil springs are compressed from above; a common frame member; and a plurality of actuators arranged in said frame member and associated with respective coil springs for compressing, when depressed, the top end of said respective coil springs, thereby electrically connecting respective first and second electrodes and, when released, disengaging said spring from said respective first electrode.
Claim 13
Dependent Claim
148 words
A switching device comprising: an insulation substrate have a substantially plain surface; a plurality of first electrodes formed on said plain surface of said insulation substrate; a plurality of second electrodes extending from and integral with a conductive plate closely superposed on said insulation substrate and formed by cutting in a helical form those portions of said conductive plate which face said first electrodes and drawing out the helical sections thus cut into conical coil springs, said coil springs having their top ends electrically connected to respective first electrodes when said coil springs are compressed from above; a common frame member; and a plurality of actuators arranged in said frame member and associated with respective coil springs for compressing, when depressed, the top end of said respective coil springs, thereby electrically connecting respective first and second electrodes and, when released, disengaging said spring from said respective first electrode.
Claim 14
Dependent Claim
14 words
A switching device according to claim 11 wherein said first electrodes are generally disc-shaped.
Claim 15
Dependent Claim
17 words
A switching device according to claim 11 wherein said first electrodes are each coupled to respective terminals.
Claim 16
Dependent Claim
17 words
A switching device according to claim 11 wherein said Actuators are slidably mounted in said frame member.
Claim 17
Dependent Claim
30 words
A switching device according to claim 11 including means extending through the thickness of said insulation substrate and electrically coupling at least one of said first electrodes to a terminal.
Claim 18
Dependent Claim
32 words
A switching device according to claim 15 wherein said terminal is on the side of said substrate opposite to said plain surface of said insulation substrate on which said electrodes are formed.
Claim 19
Dependent Claim
27 words
A switching device according to claim 15 wherein said coupling means extends through a hole in said substrate, said hole being substantially concentric with respective first electrodes.
Claim 20
Dependent Claim
14 words
A switching device according to claim 11 wherein said first electrodes are plain electrodes.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |