US3625458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive mechanism for sound recording and playback devices
Assignee: Individual
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Filing: 1969-07-24
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Granted: 1971-12-07
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Expires: 1989-07-24
Abstract
Abstract A compact drive mechanism for a tape recorder enabling the recorder to rapidly drive tape in a forward or a reverse direction or at a slower record and playback speed. The drive mechanism includes a motor having a double-ended drive shaft. A pair of friction clutch means is connected to forward and reverse tape-driving spindles of the recorder for selective coupling to opposite ends of the drive shaft to effect the rapid forward and reverse tape drive. A transmission means connects between one end of the drive shaft and the capstan of the recorder to turn the capstan at the record and playback speed. This occurs when the friction clutch couples the forward tape-driving spindle to the drive shaft. Thus, when the pinch roller of the recorder is engaged, the capstan drive overrides the clutch means of the forward tape-driving spindle causing it to slip and tape to be driven from a reel on the reverse tape-driving spindle to a reel on the forward tape-driving spindle at the playback and recording speed.
Inventors
- 👤 Peter Karl-Heinz Fischer
- 👤 Rudolph Herrmann Mesecke
- 👤 Hans-Joachim Schoening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:00
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
299 words
A drive mechanism for a compact tape recorder including a capstan, a selectively operable pinch roller, and a forward tapedriving spindle laterally spaced from a reverse tape-driving spindle, said drive mechanism comprising: a drive motor having first and second drive shaft means; pivot means supporting said drive motor for tilting movement on an axis transverse to said drive shaft means between normal and first and second tilted positions; first torque transmission means connected to said reverse drive spindle for coupling to said first drive shaft means when said motor is in said first tilted position to turn said reverse drive spindle at a predetermined reverse drive speed in response to operation of said drive motor; second torque transmission means connected to said forward tapedriving spindle for frictional drive coupling to said second drive shaft means when said motor is in said second tilted position to turn said forward tape-driving spindle at a predetermined forward drive speed in response to operation of said drive motor, said second torque transmission means comprising a turntable on said forward tape-driving spindle, a transmission wheel engaging said turntable and journaled for turning on an axis transverse thereto with a circumferential edge adapted to frictionally engage said second drive shaft means when said drive motor is in said second tilted position; and third torque transmission means operative when said drive motor is in said second tilted position for turning said capstan at a forward record and playback speed less than said forward drive speed whereby when saiD pinch roller is operated and bearing against said capstan, tape is transported from a reel on said reverse driving spindle to a reel on said forward driving spindle at said forward record and playback speed and slippage occurs between said transmission wheel and said second drive shaft means.
Claim 2
Dependent Claim
299 words
A drive mechanism for a compact tape recorder including a capstan, a selectively operable pinch roller, and a forward tapedriving spindle laterally spaced from a reverse tape-driving spindle, said drive mechanism comprising: a drive motor having first and second drive shaft means; pivot means supporting said drive motor for tilting movement on an axis transverse to said drive shaft means between normal and first and second tilted positions; first torque transmission means connected to said reverse drive spindle for coupling to said first drive shaft means when said motor is in said first tilted position to turn said reverse drive spindle at a predetermined reverse drive speed in response to operation of said drive motor; second torque transmission means connected to said forward tapedriving spindle for frictional drive coupling to said second drive shaft means when said motor is in said second tilted position to turn said forward tape-driving spindle at a predetermined forward drive speed in response to operation of said drive motor, said second torque transmission means comprising a turntable on said forward tape-driving spindle, a transmission wheel engaging said turntable and journaled for turning on an axis transverse thereto with a circumferential edge adapted to frictionally engage said second drive shaft means when said drive motor is in said second tilted position; and third torque transmission means operative when said drive motor is in said second tilted position for turning said capstan at a forward record and playback speed less than said forward drive speed whereby when saiD pinch roller is operated and bearing against said capstan, tape is transported from a reel on said reverse driving spindle to a reel on said forward driving spindle at said forward record and playback speed and slippage occurs between said transmission wheel and said second drive shaft means.
Claim 3
Dependent Claim
100 words
The drive mechanism of claim 1 wherein said third torque transmission means comprises a flywheel on said capstan for turning therewith, a transmission shaft, a friction wheel on one end of said transmission shaft for circumferentially engaging said flywheel, a pulley on an opposite end of said transmission shaft, a second pulley on said first drive shaft means, and a continuous belt extending around said first and second pulleys whereby operation of said drive motor when in said second tilted position produces a turning of said capstan through said first and second pulleys, said transmission shaft, and said friction wheel.
Claim 4
Dependent Claim
22 words
The drive mechanism of claim 2 further including means pivotally supporting said transmission shaft for tilting movement on an axis transverse thereto.
Claim 5
Dependent Claim
59 words
The drive mechanism of claim 2 wherein said first torque transmission means comprises a turntable on said reverse tape-driving spindle, a transmission wheel engaging said turntable and journaled for turning on an axis transverse thereto with an edge adapted to circumferentially and frictionally engage said first drive shaft means when said drive motor is in said first tilted position.
Claim 6
Dependent Claim
305 words
In a portable tape recorder or the like including a vertical capstan and a selectively operable pinch roller for pressing against said capstan, the combination comprising: vertically extending and laterally spaced forward and reverse drive spindles for turning about their vertical longitudinal axes; a drive motor having a double-ended shaft for turning said shaft in a predetermined direction; pivot means supporting said drive motor for tilting movement on a horizontal axis between normal and first and second tilted positions with opposite ends of said drive shaft immediately under said reverse and forward drive spindles respectively; first torque transmission means mounted above a first end of said drive shaft and connected to said reverse drive spindle for coupling to said first end of said drive shaft when said motor is in said first tilted position to turn said reverse drive spindle at a predetermined reverse drive speed in response to operation of said drive motor; second torque transmission means immediately above a second end of said drive shaft and connected to said forward drive spindle for frictional drive coupling to said second end of said drive shaft when said motor is in said second tilted position to turn said forward drive spindle at a predetermined forward drive speed in response to operation at said drive motor; and third torque transmission means operative when said drive motor is in said second tilted position for turning said capstan at a forward record and playback speed less than said forward drive speed whereby when said pinch roller is operated and bearing against said capstan, tape or the like is transported from a reel on said reverse drive spindle to a reel on said forward drive spindle at said forward record and playback speed and slippage occurs between said second transmission means and said second end of said drive shaft.
Claim 7
Dependent Claim
305 words
In a portable tape recorder or the like including a vertical capstan and a selectively operable pinch roller for pressing against said capstan, the combination comprising: vertically extending and laterally spaced forward and reverse drive spindles for turning about their vertical longitudinal axes; a drive motor having a double-ended shaft for turning said shaft in a predetermined direction; pivot means supporting said drive motor for tilting movement on a horizontal axis between normal and first and second tilted positions with opposite ends of said drive shaft immediately under said reverse and forward drive spindles respectively; first torque transmission means mounted above a first end of said drive shaft and connected to said reverse drive spindle for coupling to said first end of said drive shaft when said motor is in said first tilted position to turn said reverse drive spindle at a predetermined reverse drive speed in response to operation of said drive motor; second torque transmission means immediately above a second end of said drive shaft and connected to said forward drive spindle for frictional drive coupling to said second end of said drive shaft when said motor is in said second tilted position to turn said forward drive spindle at a predetermined forward drive speed in response to operation at said drive motor; and third torque transmission means operative when said drive motor is in said second tilted position for turning said capstan at a forward record and playback speed less than said forward drive speed whereby when said pinch roller is operated and bearing against said capstan, tape or the like is transported from a reel on said reverse drive spindle to a reel on said forward drive spindle at said forward record and playback speed and slippage occurs between said second transmission means and said second end of said drive shaft.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |