US3684147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-directional drive mechanism with high speed reverse
Assignee: Individual
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Filing: 1971-03-08
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Granted: 1972-08-15
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Expires: 1991-03-08
Abstract
Abstract In this invention a capstan shaft carries a capstan pulley with two flanges. A first flange provides first and second cylindrical drive surfaces, while a second flange, of smaller diameter, provides a single cylindrical drive surface. A pivoted plate carries two spaced freely rotatable drive transmitting idlers. When the plate is pivoted in a first direction, a first of said drive idlers connects a motor pulley first drive surface in drive relation with a first surface of said first flange to drive said shaft in a first direction. When the plate is pivoted in a second direction a second of said drive idlers connects the motor pulley second drive surface in drive relation with the second surface of said first flange to drive said shaft in a second direction. A third drive idler is adapted to place a motor pulley third drive surface in drive relation with a drive surface of said second flange.
Inventors
- 👤 Floyd R Ysbrand
- 👤 Richard W Pembroke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:59
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
200 words
In a magnetic tape driving system in which the tape is driven by pressure contact against a rotating cylindrical capstan, said capstan adapted to be rotated in either direction, the improvement in means to drive said capstan comprising a driving assembly, comprising: a. frame means, b. an input driving shaft and an output driven shaft, spaced from and parallel to said driving shaft, and journaled to said frame, c. a driving pulley on said driving shaft carrying at least three convex driving surfaces axially spaced along said pulley, d. a driven pulley on said driven shaft carrying three driven surfaces, in operating driving alignment perpendicular to said shafts, respectively with said three driving surfaces, at least one of said driven surfaces convex and at least one of said driven surfaces concave, e. said driving and driven pulleys of rigid material, and said driving and driven surfaces adapted to be operated in pairs, f. at least three drive-transmitting idler rollers adapted respectively to be placed in drive-transmitting contact with each of said pairs of driving and driven surfaces, and g. means to selectively and sequentially place said idler rollers in drive transmitting contact with said pairs of driving and driven surfaces.
Claim 2
Dependent Claim
200 words
In a magnetic tape driving system in which the tape is driven by pressure contact against a rotating cylindrical capstan, said capstan adapted to be rotated in either direction, the improvement in means to drive said capstan comprising a driving assembly, comprising: a. frame means, b. an input driving shaft and an output driven shaft, spaced from and parallel to said driving shaft, and journaled to said frame, c. a driving pulley on said driving shaft carrying at least three convex driving surfaces axially spaced along said pulley, d. a driven pulley on said driven shaft carrying three driven surfaces, in operating driving alignment perpendicular to said shafts, respectively with said three driving surfaces, at least one of said driven surfaces convex and at least one of said driven surfaces concave, e. said driving and driven pulleys of rigid material, and said driving and driven surfaces adapted to be operated in pairs, f. at least three drive-transmitting idler rollers adapted respectively to be placed in drive-transmitting contact with each of said pairs of driving and driven surfaces, and g. means to selectively and sequentially place said idler rollers in drive transmitting contact with said pairs of driving and driven surfaces.
Claim 3
Dependent Claim
54 words
A driving assembly as in claim 1 in which said drivEn pulley includes a first flange with driven surfaces on the inside and the outside of said first flange, and including a second flange of smaller diameter than said first flange, one of the surfaces of said second flange being the third driven surface.
Claim 4
Dependent Claim
21 words
A driving assembly as in claim 2 in which the third driven surface is on the inside of said second flange.
Claim 5
Dependent Claim
21 words
A driving assembly as in claim 2 in which the third driven surface is on the outside of said second flange.
Claim 6
Dependent Claim
28 words
A driving assembly as in claim 2 including a fourth convex surface on said driving pulley, and in which both surfaces of said second flange comprise driven surfaces.
Claim 7
Dependent Claim
55 words
A driving assembly as in claim 2 including first pivoted arm means carrying a third drive-transmitting idler roller journaled on a pivot stud perpendicular to said arm, said third roller adapted, when said first arm is rotated around said pivot, to be placed in drive-transmitting contact between a third driving surface and said second flange.
Claim 8
Dependent Claim
55 words
A driving assembly as in claim 6 including second pivoted arm means carrying a fourth drive-transmitting idler roller journaled on a pivot stud perpendicular to said arm, said fourth roller adapted, when said second arm is rotated around said pivot, to be placed in drive-transmitting contact between a fourth driving surface and said second flange.
Claim 9
Dependent Claim
33 words
A driving assembly as in claim 6 including interlock means associated with said electromechanical means to prevent the contact of more than one of said idlers to said drive surfaces at one time.
Claim 10
Dependent Claim
28 words
A driving assembly as in claim 7 including interlock means to prevent the contact of more than one of said idlers to said drive surfaces at one time.
Claim 11
Dependent Claim
78 words
A driving assembly as in claim 1 including plate means pivoted to said frame, said plate means carrying two spaced drive-transmitting idler rollers journaled on two spaced studs perpendicular to said plate, one of said rollers adapted to contact a first pair of driving and driven surfaces when said plate is pivoted in one direction, and the second of said rollers adapted to contact a second pair of surfaces when said plate is pivoted in the other direction.
Claim 12
Dependent Claim
24 words
A driving assembly as in claim 1 including electromechanical means to place said drive-transmitting idler rollers into drive-transmitting contact with said pairs of surfaces.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |