US3863509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard for the preselection of electromagnetic signals
Assignee: Autovox SpA
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Filing: 1974-01-03
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Granted: 1975-02-04
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Expires: 1994-01-03
Abstract
Abstract A keyboard for receivers, especially autoradios.
Inventors
- 👤 Carmelo Zimatore
- 👤 Amedeo Pezzini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/04; H03J5/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
In a keyboard for receivers, particularly for autoradios, for pre-setting them to the reception of as many transmitters as there are keys on said keyboard, in which keyboard said keys are of a variable length and carry, fulcrumed to them, cams which can be locked in varying inclinations with respect to the key axis, said cams coacting with means to transmit said inclination to the tuning system of said receiver, the improvement that: each key cam coacts with cams, whose one end is pivotably mounted on a plate, each cam presenting an ear at both sides of its pivot, said ears being coplanar with said key cam and capable of being moved into engagement with the latter; each of the opposite ends of said eared cams is linked by a pin to a flat bolt, one end of said bolt being disconnectably linked to the tuning system of said receiver, said eared cams and said bolts forming the means to transmit the key cam inclinations to said tuning system.
Claim 2
Dependent Claim
169 words
In a keyboard for receivers, particularly for autoradios, for pre-setting them to the reception of as many transmitters as there are keys on said keyboard, in which keyboard said keys are of a variable length and carry, fulcrumed to them, cams which can be locked in varying inclinations with respect to the key axis, said cams coacting with means to transmit said inclination to the tuning system of said receiver, the improvement that: each key cam coacts with cams, whose one end is pivotably mounted on a plate, each cam presenting an ear at both sides of its pivot, said ears being coplanar with said key cam and capable of being moved into engagement with the latter; each of the opposite ends of said eared cams is linked by a pin to a flat bolt, one end of said bolt being disconnectably linked to the tuning system of said receiver, said eared cams and said bolts forming the means to transmit the key cam inclinations to said tuning system.
Claim 3
Dependent Claim
81 words
In a keyboard according to claim 1, the improvement that the pins of said opposite ends of at least the terminal eared cams are resiliently pressed against two converging sides of corresponding through holes of said bolt, the pins of the intermediate cams being spring biased against one side of polygonal holes in said bolt, while the other end of each of said eared cams is provided with holes having two downwardly converging sides, which are spring biased against stationary pivots.
Claim 4
Dependent Claim
29 words
In a keyboard according to claim 2, the improvement that the springs biasing said pins of said eared cams against the sides of said holes are arcuate leaf springs.
Claim 5
Dependent Claim
31 words
In a keyboard according to claim 3, the improvement that the ends of said arcuate springs are notched, the converging surfaces of said notches engaging the pins of said eared cams.
Claim 6
Dependent Claim
41 words
In a keyboard according to claim 3 the improvement that the ends of said arcuate springs have notches in the shape of the segment of a circle of a diameter larger than the diameter of the cam pin engaging in it.
Claim 7
Dependent Claim
54 words
In a keyboard according to claim 2, the improvement that the spring biasing said two downwardly converging sides of the holes in the eared cams against said stationary pivots is a flat spring supported, intermediate its ends, by a row of additional studs to warrant a uniform pressure Of said spring upon said cams.
Claim 8
Dependent Claim
70 words
In a keyboard according to claim 1, the improvement that said bolt is pivoted to a cam of the manual tuning gear in such a manner that the pin of said cam is pressed against one side of a polygonal through hole in the bolt by one of the notched ends of an arcuate leaf spring, whose other notched end presses against a pin of one of the eared cams.
Claim 9
Dependent Claim
47 words
In a keyboard according to claim 1, the improvement that the end portion of each eared cam containing the hole through which it is pivoted to the keyboard base plate forms a lobe which is raised relatively to the ears and the remaining portions of said cam.
Claim 10
Dependent Claim
73 words
In a keyboard according to claim 1, the improvement that one end of each key is guided in the interior of said keyboard by a guide pin integral with said key end sliding within a slot in said keyboard, and that a serrated slider is resiliently biased in said keyboard in such a manner, that the sloped sides of its teeth keep said guide pins constantly pressed against one side of said slots.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |