US3839735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer head positioning device
Assignee: American Videonetics Corp
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Filing: 1972-10-13
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Granted: 1974-10-01
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Expires: 1992-10-13
Abstract
Abstract A positioning device for disposing a transducer to each of a series of transducing positions relative to a record medium includes a transducer support member movable between advanced and retracted positions for moving the transducer therewith. A cam follower element is carried by the support member whereby a rotatable cam, movable to a plurality of discrete positions relative to the follower element, engages the follower element for positioning the transducer in relation thereto. A drive means serves to rotate the cam and includes a star wheel having a plurality of detents or teeth extending therefrom. An actuator moves between advanced and retracted positions for engaging one of the detents and thereby rotates the drive means during movement of the actuator towards the advanced position. The actuator engages another of the detents when moved in the reverse direction so as to continue rotation of the drive means and hence rotation of the cam.
Inventors
- 👤 J Denk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:53
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
246 words
A positioning device for disposing a transducer to each of a series of transducing positions relative to a record medium wherein the positions each correspond to the position of a record track of the medium comprising a transducer support member movable between advanced and retracted positions for moving the transducer therewith between said transducing positions, a cam follower element carried by said support member, a cam rotatable to a plurality of discrete positions relative to said follower element to dispose said follower element for positioning the transducer in transducing relation to each of a number of transducing positions, drive means for rotating said cam, said drive means having a plurality of detents extending therefrom, an actuator, and enabling means coupled to the actuator, said actuator being movable between advanced and retracted stable positions for engaging one of said detents and rotating said drive means sufficiently during one stroke of said enabling means to cause movement of said actuator towards said advanced stable position to dispose said follower element to position the transducer in transducing relation with respect to one of said series of positions and engaging another of said detents to continue rotation of said drive means sufficiently during one stroke of said enabling means to cause reverse movement of said actuator towards said retracted stable position to dispose said follower element to position the transducer in transducing relation with respect to one of said series of positions to another one of said series of positions.
Claim 2
Dependent Claim
246 words
A positioning device for disposing a transducer to each of a series of transducing positions relative to a record medium wherein the positions each correspond to the position of a record track of the medium comprising a transducer support member movable between advanced and retracted positions for moving the transducer therewith between said transducing positions, a cam follower element carried by said support member, a cam rotatable to a plurality of discrete positions relative to said follower element to dispose said follower element for positioning the transducer in transducing relation to each of a number of transducing positions, drive means for rotating said cam, said drive means having a plurality of detents extending therefrom, an actuator, and enabling means coupled to the actuator, said actuator being movable between advanced and retracted stable positions for engaging one of said detents and rotating said drive means sufficiently during one stroke of said enabling means to cause movement of said actuator towards said advanced stable position to dispose said follower element to position the transducer in transducing relation with respect to one of said series of positions and engaging another of said detents to continue rotation of said drive means sufficiently during one stroke of said enabling means to cause reverse movement of said actuator towards said retracted stable position to dispose said follower element to position the transducer in transducing relation with respect to one of said series of positions to another one of said series of positions.
Claim 3
Dependent Claim
33 words
A positioning device according to claim 1 wherein said detents are further disposed on opposite sides of the axis of rotation of said drive means to rotate said cam in a common direction.
Claim 4
Dependent Claim
29 words
A positioning device according to claim 1 wherein said drive means further comprises a star wheel formed to include said plurality of detents extending outwardly from the periphery thereof.
Claim 5
Dependent Claim
55 words
A positioning device according to claim 1 wherein said actuator comprises an integral pair of spaced leaf members resiliently engaging said drive means therebetween, the leaves of said actuator each including a pawl formed thereon for engaging said detents and rotating said drive means during movement of said actuator between said advanced and retracted positions.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |