Patent US3711003A successfully refreshed from Google Patents.
US3711003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capstan drive arrangemnet for high-speed intermittent tape drive
Assignee: Alcatel CIT SA
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Filing: 1971-09-27
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Granted: 1973-01-16
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Expires: 1991-09-27
Abstract
Abstract Capstan drive arrangement for high speed intermittent tape drive, including a motor driven capstan, an idler roller carried on a lever arm, and an electromagnet selectively operable to pivot the level about its axis to urge the idler roller towards the capstan to produce a tape driving pinch. The level arm is arranged so that when the electromagnet is not operated, the idler roller contacts the tape with substantially negligible pressure. The drive arrangement also includes a damping system having an elastically deformable connection between the lever arm and a rod having a side surface held in contact with a fixed abutment by a pusher.
Inventors
- 👤 M Boyer
- 👤 M Landwerlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:04
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/10; G06; G06K; G06K13/00; G06K13/18; G06K13/20; G06K13/22; G11B15/18; G11B15/26; G11B15/28; G11B15/29
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
110 words
A capstan drive arrangement suitable for a high speed intermittent tape drive, including a motor driven capstan, an idler roller carried on a lever arm, an electromagnet means for selectively pivoting said lever arm about its axis to urge the idler roller towards the capstan to produce a tape driving pinch, positioning means for positioning said lever arm when the electromagnet is not operated so that the idler roller contacts the tape with substantially negligible pressure including a support rod having a side surface held in contact with a fixed abutment by a pusher and a damping element providing elastically deformable connection between the lever arm and said support rod.
Claim 2
Dependent Claim
110 words
A capstan drive arrangement suitable for a high speed intermittent tape drive, including a motor driven capstan, an idler roller carried on a lever arm, an electromagnet means for selectively pivoting said lever arm about its axis to urge the idler roller towards the capstan to produce a tape driving pinch, positioning means for positioning said lever arm when the electromagnet is not operated so that the idler roller contacts the tape with substantially negligible pressure including a support rod having a side surface held in contact with a fixed abutment by a pusher and a damping element providing elastically deformable connection between the lever arm and said support rod.
Claim 3
Dependent Claim
35 words
An arrangement as claimed in claim 1 wherein one end of said support rod is connected to a slider slidable on a second rod, the slider and second rod being coupled together by a spring.
Claim 4
Dependent Claim
29 words
An arrangement as claimed in claim 2 wherein said damping element providing the elastically deformable connection comprises a mass of elastomer Material molded onto the rod and lever arm.
Claim 5
Dependent Claim
19 words
An arrangement as claimed in claim 3 wherein the rod terminates in an enlarged portion embedded in the mass.
Claim 6
Dependent Claim
14 words
An arrangement as claimed in claim 4 wherein the enlarged portion is a disc.
Claim 7
Dependent Claim
19 words
An arrangement as claimed in claim 5 wherein the pusher is urged towards the rod by a coil spring.
Claim 8
Dependent Claim
59 words
An arrangement as claimed in claim 6 wherein the coil spring has one end attached to the pusher and the second end attached to a nut threaded on a screw-threaded portion of a fixed third rod, so that the position of the second end of the coil spring may be adjusted relative to the position of the third rod.
Claim 9
Dependent Claim
19 words
An arrangement as claimed in claim 7 wherein the third rod terminates in a cylindrical cavity in the pusher.
Claim 10
Dependent Claim
45 words
An arrangement as claimed in claim 8, wherein the coil spring which connects the slider and second rod is attached at one end to the slider and at its other end to a nut threaded on the second rod which is fixed at one end.
Claim 11
Dependent Claim
22 words
An arrangement as claimed in claim 9 wherein the abutment and pusher have a cross-section smaller than the diameter of the rod.
Claim 12
Dependent Claim
22 words
An arrangement as claimed in claim 10 wherein the abutment and pusher are made of a mechanically harder material than the rod.
Claim 13
Dependent Claim
22 words
An arrangement according to claim 11 wherein the abutment and pusher are made of steel and the rod is made of bronze.
Claim 14
Dependent Claim
14 words
An arrangement as claimed in claim 12 wherein the rod is a flat rod.
Claim 15
Dependent Claim
45 words
An arrangement as claimed in claim 2 wherein the coil spring which connects the slider and second rod is attached at one end to the slider and at its other end to a nut threaded on the second rod which is fixed at one end.
Claim 16
Dependent Claim
29 words
An arrangement as claimed in claim 1 wherein said damping element providing the elastically deformable connection comprises a mass of elastomer material molded onto the rod and lever arm.
Claim 17
Dependent Claim
19 words
An arrangement as claimed in claim 1 wherein the pusher is urged towards the rod by a coil spring.
Claim 18
Dependent Claim
22 words
An arrangement as claimed in claim 1 wherein the abutment and pusher have a cross-section smaller than the diameter of the rod.
Claim 19
Dependent Claim
22 words
An arrangement as claimed in claim 1 wherein the abutment and pusher are made of a mechanically harder material than the rod.
Claim 20
Dependent Claim
22 words
An arrangement according to claim 1 wherein the abutment and pusher are made of steel and the rod is made of bronze.
Claim 21
Dependent Claim
14 words
An arrangement as claimed in claim 1 wherein the rod is a flat rod.
References Cited (Backward Citations)
US3136467A
Cited
US3494612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |