US3894702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reel disc device in a recording and/or reproducing apparatus
Assignee: Victor Company of Japan Ltd
•
Filing: 1973-12-26
•
Granted: 1975-07-15
•
Expires: 1993-12-26
Abstract
Abstract A reel drive disc device has a sliding friction clutch for transmitting output power, at constant rotational speed and with a desired torque, to a reel-supporting disc which is rotated at a speed that varies in accordance with the diameter of the tape roll wound thereon. This sliding friction clutch operates responsive to a pressing together of a felt friction member and a member made of a highly wear-resistant resin such as a polyethylene terephthalate resin. Its power transmitting torque is maintained substantially constant over a long period.
Inventors
- 👤 Takeshi Okano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:02
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/18; G03B1/20; G03B1/32
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
A reel disc device in a recording and/or reproducing apparatus, whIch device comprises: a driven disc engaging a reel and rotating the same in a direction to take up a tape-form recording medium; a driving disc disposed on one side of said driven disc and adapted to be rotatable as a structure separate from the driven disc; driving means for transmitting rotational driving power to said driving disc; and rotational power transmission means operating to transmit rotational power from the driving disc to the driven disc and comprising a first friction member made of felt and adapted to rotate unitarily with either of the driven and driving discs, a second friction member made of a material having a wear resistance superior to those of phenolic resins and properties almost completely unaffected by heat generated by friction and adapted to rotate unitarily with the other of the driven and driving discs, and pressing means for pressing said first and second friction members against each other thereby to produce sliding friction resistance between said friction members whereby rotational power is transmitted from the driving disc to the driven disc.
Claim 2
Dependent Claim
187 words
A reel disc device in a recording and/or reproducing apparatus, whIch device comprises: a driven disc engaging a reel and rotating the same in a direction to take up a tape-form recording medium; a driving disc disposed on one side of said driven disc and adapted to be rotatable as a structure separate from the driven disc; driving means for transmitting rotational driving power to said driving disc; and rotational power transmission means operating to transmit rotational power from the driving disc to the driven disc and comprising a first friction member made of felt and adapted to rotate unitarily with either of the driven and driving discs, a second friction member made of a material having a wear resistance superior to those of phenolic resins and properties almost completely unaffected by heat generated by friction and adapted to rotate unitarily with the other of the driven and driving discs, and pressing means for pressing said first and second friction members against each other thereby to produce sliding friction resistance between said friction members whereby rotational power is transmitted from the driving disc to the driven disc.
Claim 3
Dependent Claim
37 words
A reel disc device according to claim 1 in which said second friction member comprises a resinous friction member made of a resin selected from the group consisting of polyethylene terephthalate resins, polyamide resins, and polyethylene resins.
Claim 4
Dependent Claim
39 words
A reel disc device according to claim 1 in which said second friction member comprises a paper member treated with a treatment agent selected from the group consisting of carbon, silicon, polyethylene terephthalate resins, polyamide resins, and polyethylene resins.
Claim 5
Dependent Claim
36 words
A reel disc device according to claim 1 in which said second friction member is made of a resin selected from the group consisting of polyethylene terephthalate resins, polyamide resins, and polyethylene resins all containing carbon.
Claim 6
Dependent Claim
53 words
A reel disc device according to claim 1 in which said second friction member comprises a sheet material made of a resin selected from the group consisting of polyethylene terephthalate resins, polyamide resins, and polyethylene resins and secured to said other of the discs at a position thereon confronting said felt friction member.
Claim 7
Dependent Claim
34 words
A reel disc device according to claim 1 in which said other of the disc is made of the same resin as said second friction member and functions also as said second friction member.
Claim 8
Dependent Claim
78 words
A reel disc device according to claim 1 in which said driven disc comprises a first disc driven directly only at the time of high-speed driving and a second disc disposed on one side of said first disc with a clutch mechanism adapted to slip when an excessive load is imposed thereon interposed therebetween and engaging the reel, and said rotational power transmission means is provided between the driving disc and said second disc of the driven disc.
Claim 9
Dependent Claim
130 words
A reel disc device according to claim 1 in which: said driven disc comprises a first driven disc part disposed on one side of the driving disc and a second driven disc part disposed on the side opposite to said one side of the driving disc and coupled to rotate unitarily with said first driven disc part; and said rotational power transmission means comprises first rotational power transmitting means provided between the driving disc and said first driven disc part and operating to transmit rotational power from the driving disc to the first driven disc part and a second rotational power transmitting means provided between the driving disc and said second driven disc part and operating to transmit rotational power from the driving disc to the second driven disc part.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |