US3739998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reel driving device
Assignee: Sony Corp
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Filing: 1972-03-17
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Granted: 1973-06-19
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Expires: 1992-03-17
Abstract
Abstract A tape reel intended for use in a tape recording and/or reproducing apparatus is provided with a coaxial socket having an end wall with one or more apertures therein spaced radially from the socket axis, and the apparatus includes a reel-driving device comprising a rotated shaft which is inserted into the reel socket and which has at least one coupling pin projecting from the shaft''s end surface and engaging in an aperture of the socket''s end wall, such coupling pin having a peripheral surface which is undercut in the direction toward the shaft''s end surface, for example, by being frusto-conical, so that the engagement of that peripheral surface with the perimeter of the aperture urges the tape reel onto the reel drive shaft in response to the rotation of the latter.
Inventors
- 👤 H Esashi
- 👤 K Kawamata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/041; G11B23/048; G11B15/00; G11B15/18; G11B15/26; G11B15/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
186 words
A reel-driving device of a tape recording and/or reproducing apparatus for rotating a tape reel provided with a coaxial socket having an end wall with at least one aperture therein which is spaced radially from the axis of the socket; said reel-driving device comprising a rotated reel drive shaft including a portion dimensioned for insertion into the reel socket and having an end surface, and at least one coupling pin projecting from said end surface and spaced radially from the axis of the shaft for engagement in an aperture of the socket''s end wall when said portion of the shaft is inserted in the socket, said coupling pin having a peripheral surface which, at least at the side thereof facing in the direction of rotation of said shaft, is inclined with respect to the axis of said shaft so as to be undercut in the direction toward said end surface of the shaft, whereby the engagement of said peripheral surface of the coupling pin with the perimeter of the aperture in the socket''s end wall urges the respective tape reel axially onto said reel drive shaft.
Claim 2
Dependent Claim
186 words
A reel-driving device of a tape recording and/or reproducing apparatus for rotating a tape reel provided with a coaxial socket having an end wall with at least one aperture therein which is spaced radially from the axis of the socket; said reel-driving device comprising a rotated reel drive shaft including a portion dimensioned for insertion into the reel socket and having an end surface, and at least one coupling pin projecting from said end surface and spaced radially from the axis of the shaft for engagement in an aperture of the socket''s end wall when said portion of the shaft is inserted in the socket, said coupling pin having a peripheral surface which, at least at the side thereof facing in the direction of rotation of said shaft, is inclined with respect to the axis of said shaft so as to be undercut in the direction toward said end surface of the shaft, whereby the engagement of said peripheral surface of the coupling pin with the perimeter of the aperture in the socket''s end wall urges the respective tape reel axially onto said reel drive shaft.
Claim 3
Dependent Claim
34 words
A reel-driving device according to claim 1, in which said peripheral surface of the coupling pin is frusto-conical and decreases in diameter in the direction toward said end surface of the reel drive shaft.
Claim 4
Dependent Claim
72 words
A reel-driving device according to claim 1, in which said portion of the reel drive shaft has an axially directed bore for each said coupling pin which opens at said end surface of the shaft and slidably receives the respective coupling pin so that the latter can retract into said bore, and spring means in said bore acting on said coupling pin for urging the latter to project beyond said end surface.
Claim 5
Dependent Claim
52 words
A reel-driving device according to claim 1, in which at least a second coupling pin, as aforesaid, projects from said end surface of the reel drive shaft to provide the latter with a plurality of said coupling pins, and said coupling pins are equally spaced apart about said axis of the shaft.
Claim 6
Dependent Claim
188 words
In a tape recording and/or reproducing apparatus: the combination of a tape reel provided with a coaxial socket having an end wall with at least one aperture therein which is spaced radially from the axis of the socket, a rotated reel drive shaft including a portion slidably received in said socket and having an end surface positioned adjacent said end wall, and at least one coupling pin projecting from said end surface and spaced radially from the axis of the shaft similarly to the radial spacing of said aperture from said axis of the socket, said coupling pin being received in said aperture and having a peripheral surface which, at least at the side thereof facing in the direction of rotation of said shaft,is inclined with respect to the axis of said shaft so as to be undercut in the direction toward said end surface of the shaft, whereby the engagement of said peripheral surface of said coupling pin with the perimeter of said aperture in the socket''s end wall urges said tape reel axially onto said reel drive shaft in response to the rotation of the latter.
Claim 7
Dependent Claim
188 words
In a tape recording and/or reproducing apparatus: the combination of a tape reel provided with a coaxial socket having an end wall with at least one aperture therein which is spaced radially from the axis of the socket, a rotated reel drive shaft including a portion slidably received in said socket and having an end surface positioned adjacent said end wall, and at least one coupling pin projecting from said end surface and spaced radially from the axis of the shaft similarly to the radial spacing of said aperture from said axis of the socket, said coupling pin being received in said aperture and having a peripheral surface which, at least at the side thereof facing in the direction of rotation of said shaft,is inclined with respect to the axis of said shaft so as to be undercut in the direction toward said end surface of the shaft, whereby the engagement of said peripheral surface of said coupling pin with the perimeter of said aperture in the socket''s end wall urges said tape reel axially onto said reel drive shaft in response to the rotation of the latter.
Claim 8
Dependent Claim
40 words
In a tape recording and/or reproducing apparatus: the combination according to claim 5, in which said peripheral surface of the coupling pin is frusto-conical and decreases in diameter in the direction toward said end surface of the reel drive shaft.
Claim 9
Dependent Claim
64 words
In a tape recording and/or reproducing apparatus: the combination according to claim 6, in which said perimeter of the aperture is substantially cylindrical and said coupling pin extends through said end wall of the socket so that said frusto-conical peripheral surface of the coupling pin is engageable with said perimeter of the aperture at the surface of said end wall remote from said socket.
Claim 10
Dependent Claim
30 words
In a tape recording and/or reproducing apparatus: the combination according to claim 6, in which said perimeter of the aperture is frusto-conical similarly to said periphery of the coupling pin.
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |