Patent US4226128A successfully refreshed from Google Patents.
US4226128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction device for use in car radios
Assignee: Autovox SpA
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Filing: 1978-04-13
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Granted: 1980-10-07
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Expires: 1998-04-13
Abstract
Abstract A friction device for coupling the manual tuning knob of a keyboard (pushbutton) radio to a reciprocal tuning slidebar is disclosed. The friction device comprises a cylindrical rod attached to the tuning slidebar which selectively is drivingly engaged by a peripheral V-shaped groove in a pulley rotated by the manual tuning knob.
Inventors
- 👤 Ezio F. Dellantonio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:57
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/12; F; F16; F16H; F16H19/00; F16H19/02; F16H19/025; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A friction device for use in car radios in which a frame carries a conventional tuning slider, a tuning knob and a keyboard of keys for the preselection of transmitter stations, wherein the improvement comprises: a reciprocable element secured to the tuning slider; and a rotatable element driven by the tuning knob, said elements being releasably urged against each other into frictional contact and their surfaces of mutual contact being shaped in such a manner that the surface of one element is wedged into the surface of the other element.
Claim 2
Dependent Claim
90 words
A friction device for use in car radios in which a frame carries a conventional tuning slider, a tuning knob and a keyboard of keys for the preselection of transmitter stations, wherein the improvement comprises: a reciprocable element secured to the tuning slider; and a rotatable element driven by the tuning knob, said elements being releasably urged against each other into frictional contact and their surfaces of mutual contact being shaped in such a manner that the surface of one element is wedged into the surface of the other element.
Claim 3
Dependent Claim
22 words
A device according to claim 1, in which said reciprocable element is a rod and said rotatable element is a grooved pulley.
Claim 4
Dependent Claim
21 words
A device according to claim 2, in which said rod has a circular cross-section and said pulley has a V-shaped groove.
Claim 5
Dependent Claim
25 words
A device according to claim 1, in which said elements are urged against each other by a rotatable roller resiliently biased against the reciprocable element.
Claim 6
Dependent Claim
18 words
A device according to claim 3, in which said cylindrical rod has at least one conical end portion.
Claim 7
Dependent Claim
17 words
A device according to claim 3, in which said cylindrical rod has conical portions at both ends.
Claim 8
Dependent Claim
35 words
A device according to claim 5, in which spring means are provided to bias the rod in the direction in which said conical end portion is drawn towards the area of contact with said pulley.
Claim 9
Dependent Claim
36 words
A device according to claim 5, in which spring means are provided to bias the tuning slider in the direction in which said conical end portion is drawn towards the area of contact with said pulley.
Claim 10
Dependent Claim
39 words
A device according to claim 5, in which spring means are provided to bias an element controlling the tuning slider in the direction in which said conical end portion is drawn towards the area of contact with said pulley.
Claim 11
Dependent Claim
21 words
A device according to claim 1, in which said reciprocable element is pivotally connected to an element controlling the tuning slider.
Claim 12
Independent Claim
42 words
A device according to claims 2 or 3 which includes a gear coupling said tuning knob to said grooved pulley, and which includes a spring means coupling the gear to the frame to inhibit the rod from transmitting motion to the pulley.
Claim 13
Independent Claim
28 words
A device according to claims 1, 2 or 3 wherein said elements are releasably urged against each other by a pivotal lever selectively biasing said elements into engagement.
Claim 14
Dependent Claim
56 words
A device according to claim 12 wherein the movement of said pivotal lever is controlled by an axially moveable bar which is axially biased by a spring, the axial position of said bar determining the pivotal position of said lever which in turn determines whether said elements are brought into driving frictional contact with each other.
Claim 15
Independent Claim
35 words
A device according to claims 1, 2 or 3 wherein said tuning knob is rotatable about an axis which is parallel to the axis about which said rotatable element is driven by the tuning knob.
Claim 16
Independent Claim
20 words
A device according to claims 1, 2 or 3 wherein at least one of said elements is made of metal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |