US3825209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape recorder driving mechanism
Assignee: Bang and Olufsen AS
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Filing: 1972-11-27
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Granted: 1974-07-23
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Expires: 1992-11-27
Abstract
Abstract A tape recorder drive mechanism comprising a motor driven capstan and motor driven spool carriers operable to selectively cause the tape to be wound up and unwound, respectively, with low speed by normal operation and with high speed by fast forward or rearward winding, characterised by the combination that the capstan is driven by a separate motor and that for driving the spool carriers there is used a single winding motor operable to selectively drive either of said spool carriers with a high or a low moment of rotation depending of the operation condition, whereas said winding motor is electrically reversable and is connected with automatic coupling means operable to establish driving connection between the motor and one or the other spool carrier in accordance with the direction of rotation of the motor, said driving means being established through substantially nonslipping transmission means, said winding motor being adapted to be fed with a higher or lower voltage, respectively, for producing said high or low moment of rotation.
Inventors
- 👤 E Mikkelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:29
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/26; G11B15/32; G11B15/28; G11B15/44
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
85 words
A tape recorder drive mechanism comprising in combination a. a chassis, b. a first and a second shaft rotatably mounted in said chassis each of said shafts carrying a spool carrier, c. a reversable motor carried by said chassis, d. substantially non-slipping coupling means for drivingly connecting said motor to either one of said shafts according to the direction of rotation of said motor, the non-driven shaft being allowed to rotate substantially freely, and e. electrical means for changing the torque produced by the motor.
Claim 2
Dependent Claim
85 words
A tape recorder drive mechanism comprising in combination a. a chassis, b. a first and a second shaft rotatably mounted in said chassis each of said shafts carrying a spool carrier, c. a reversable motor carried by said chassis, d. substantially non-slipping coupling means for drivingly connecting said motor to either one of said shafts according to the direction of rotation of said motor, the non-driven shaft being allowed to rotate substantially freely, and e. electrical means for changing the torque produced by the motor.
Claim 3
Dependent Claim
88 words
A tape recorder drive mechanism according to claim 1 wherein said coupling means comprises a. a pulley fixed to the motor shaft, b. a pair of pulleys mounted on said first shaft and said second shaft respectively, c. a belt which is permanently engaged with said motor pulley, and d. an automatic coupling mechanism which is arranged to cause said belt to be engaged with the pulley on said first shaft or with the pulley on said second shaft dependent on the direction of movement of said belt.
Claim 4
Dependent Claim
154 words
A tape recorder drive mechanism according to claim 2, wherein said coupling mechanism comprises a belt lifting member pivotally mounted adjacent each of the pulleys mounted on said first and second shaft, respectively, a belt lifting roller operatively connected with each belt lifting member, said belt lifting members being frictionally engaged with said belt in such a manner that during movement of said belt in one direction a respective belt lifting member is carried along with the belt to thereby interpose its respective belt lifting roller between said belt and said pulley, stop means for limiting the movement of each of said belt lifting members, said stop means defining an active position of said belt lifting members, movement of the belt in the opposite direction causing a respective belt lifting member to be carried along with the belt from said active position to thereby swing its respective belt lifting roller into an inactive position.
Claim 5
Dependent Claim
43 words
A tape recorder drive mechanism according to claim 3, wherein means are provided for coupling said two belt lifting members whereby movement of one belt lifting member from a first position to a second position causes the opposite movement of the other member.
Claim 6
Dependent Claim
40 words
A tape recorder drive mechanism according to claim 1, wherein means are provided for connecting each spool carrier with its respective pulley as to be freely rotatable with relation thereto through an angle of less than 360*, preferably about 330*.
Claim 7
Dependent Claim
43 words
A tape recorder drive mechanism according to claim 3, wherein means are rotatably mounted at said first and second shafts for supporting said belt lifting members and wherein means are provided for connecting said supporting means of each of said belt lifting members.
Claim 8
Dependent Claim
28 words
A tape recorder drive mechanism according to claim 6, wherein said connecting means is a lever the respective ends of which are pivotally mounted on said supporting means.
Claim 9
Dependent Claim
42 words
A tape recorder drive mechanism according to claim 3, wherein a means is provided for connecting said two belt lifting members and wherein said stop means cooperates with said connecting means to define said active position of a respective belt lifting member.
Claim 10
Dependent Claim
28 words
A tape recorder drive mechanism according to claim 8, wherein said connecting means is a lever the respective ends of which are pivotally mounted on said supporting means.
Claim 11
Dependent Claim
21 words
A tape reCorder drive mechanism according to claim 9, wherein said stop means are provided of each of said supporting means.
Claim 12
Dependent Claim
22 words
A tape recorder drive mechanism according to claim 5, wherein said means for connecting each spool carrier consists of a dog coupling.
Claim 13
Dependent Claim
50 words
A tape recorder drive mechanism according to claim 11, wherein said dog coupling includes a sleeve portion disposed on said first and second shafts, means for fixing said sleeve portions on its respective shaft, and a dog pin fixed to each of said pulleys cooperating with said last mentioned means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |