Patent US3773335A successfully refreshed from Google Patents.
US3773335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral track type magnetic recording and reproducing device
Assignee: Ricoh Co Ltd
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Filing: 1971-09-28
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Granted: 1973-11-20
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Expires: 1991-09-28
Abstract
Abstract A spiral track magnetic recording and reproducing device wherein the head is mounted on a rack for radial movement. An indicating device is mounted over a rotatable segment and operated by an inclined cam lever that moves a shaft vertially as the head moves radially. A connected pivoting lever then moves a string connected to the indicating device which thereby registers the recording time on a marked scale.
Inventors
- 👤 S Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/04; G11B21/043; G11B19/00; G11B19/02; G11B19/022
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
267 words
A spiral track magnetic recording and reproducing device having a recording and reproducing head mounted on a rack for radial movement in selective contact with a track on a recording sheet comprising a turntable on which said head is mounted; means engaging said rack for translating rotary movement of said rack with said turntable to linear movement of said rack, radially with respect to said turntable; control means connected to selectively move said head out of contact with said sheet and move said rack out of engagement with said means engaging said rack; a fixed disk coaxial with said turntable and having a spiral groove therein, an element connected with said head in fixed relation thereto, and means for moving said spiral groove into engagement with said element to move said head radially outwardly when said head is out of contact with said sheet; a power source for rotating said turntable; a stationary intermediate plate located coaxially below said turntable; said turntable mounted on a tubular shaft, and a solid shaft mounted within said tubular shaft for vertical movement therein and having an upper part extending above said tubular shaft and a lower part extending below said tubular shaft; a bridge element mounted on said intermediate plate; a lever pivotally mounted on said bridge and having one end thereof in contact with said lower part of said shaft; resilient means connected to the other end of said lever and extending therefrom to a remote area of said device; and indicating means connected with said resilient means for indicating recording time corresponding to the pivoting of said lever.
Claim 2
Dependent Claim
267 words
A spiral track magnetic recording and reproducing device having a recording and reproducing head mounted on a rack for radial movement in selective contact with a track on a recording sheet comprising a turntable on which said head is mounted; means engaging said rack for translating rotary movement of said rack with said turntable to linear movement of said rack, radially with respect to said turntable; control means connected to selectively move said head out of contact with said sheet and move said rack out of engagement with said means engaging said rack; a fixed disk coaxial with said turntable and having a spiral groove therein, an element connected with said head in fixed relation thereto, and means for moving said spiral groove into engagement with said element to move said head radially outwardly when said head is out of contact with said sheet; a power source for rotating said turntable; a stationary intermediate plate located coaxially below said turntable; said turntable mounted on a tubular shaft, and a solid shaft mounted within said tubular shaft for vertical movement therein and having an upper part extending above said tubular shaft and a lower part extending below said tubular shaft; a bridge element mounted on said intermediate plate; a lever pivotally mounted on said bridge and having one end thereof in contact with said lower part of said shaft; resilient means connected to the other end of said lever and extending therefrom to a remote area of said device; and indicating means connected with said resilient means for indicating recording time corresponding to the pivoting of said lever.
Claim 3
Dependent Claim
45 words
A device according to claim 1 comprising a cam lever in contact with the upper part of said shaft, and means coupling said cam lever for movement with said rack to thereby cause vertical movement of said shaft and corresponding pivotal movement of said lever.
Claim 4
Dependent Claim
32 words
A device according to claim 1 comprising means for mounting said bridge element below said intermediate plate, said bridge element having a part which extends through a slot in said rotatable segment.
Claim 5
Dependent Claim
25 words
A device according to claim 1 comprising spring means mounted on said pivot lever for providing a bias tending to move said solid shaft upwardly.
Claim 6
Dependent Claim
34 words
A device according to claim 1 in which said resilient means is a string extending from said one end of said pivot lever below said intermediate plate through an opening in said intermediate plate.
Claim 7
Dependent Claim
24 words
A device according to claim 5 comprising pulley means positioned above said intermediate plate said string being directed to pass over said pulley means.
Claim 8
Dependent Claim
32 words
A device according to claim 1 in which said indicating means comprises a marked scale and a pointer that slides along said marked scale, said pointer being coupled to said resilient means.
Claim 9
Dependent Claim
27 words
A device according to claim 1 comprising a comprEssion spring connected between the remote end of said resilient means and the upper part of said intermediate plate.
Claim 10
Dependent Claim
39 words
A device according to claim 2 in which said cam lever has an inclined side pressed against the upper part of said solid shaft to provide the vertical movement of said shaft as said cam lever is moved thereacross.
Claim 11
Dependent Claim
163 words
In a system of the type including a first element rotatable on a first shaft, a second element, and means for mounting said second element on one side of said first element for rotation therewith and for radial movement with respect thereto; means for indicating the radial position of said second element with respect to the axis of said shaft, said indicating means comprising a second shaft, said first shaft being hollow, said second shaft being slidably mounted within said first shaft, means for resiliently biasing said second shaft in one longitudinal direction, cam means engaging the end of said second shaft on one side of said first element, means coupling said cam means to said second element whereby radial displacement of said second element effects longitudinal displacement of said second shaft, and means engaging the other end of said second shaft for indicating the longitudinal displacement of said second shaft, whereby said indicating means indicates the radial position of said second element.
Claim 12
Dependent Claim
163 words
In a system of the type including a first element rotatable on a first shaft, a second element, and means for mounting said second element on one side of said first element for rotation therewith and for radial movement with respect thereto; means for indicating the radial position of said second element with respect to the axis of said shaft, said indicating means comprising a second shaft, said first shaft being hollow, said second shaft being slidably mounted within said first shaft, means for resiliently biasing said second shaft in one longitudinal direction, cam means engaging the end of said second shaft on one side of said first element, means coupling said cam means to said second element whereby radial displacement of said second element effects longitudinal displacement of said second shaft, and means engaging the other end of said second shaft for indicating the longitudinal displacement of said second shaft, whereby said indicating means indicates the radial position of said second element.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |