US4266783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanisms for pick-up arms of record players
Assignee: Braun GmbH
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Filing: 1978-03-14
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Granted: 1981-05-12
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Expires: 1998-03-14
Abstract
Abstract A control mechanism for raising, swinging and lowering the pick-up arm of a record player comprising a disc having an arcuately shaped depression in the periphery thereof. The contacts of an electrical contact sensor switch are located in the disc peripheral depression and bridging of these contacts will cause generation of a first command signal for the control mechanism. Devices for generating second and possibly third command signals are associated with the disc which may be rotatably mounted.
Inventors
- 👤 Udo Milutzki
- 👤 Harry Gaus
- 👤 Dietwald Schotte
- 👤 Klaus Ramspeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:59
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/08; G11B3/085; G11B3/08503; G11B3/08506; G11B3/08516
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
219 words
In apparatus for controlling the movements of the tone arm of a record player relative to a turntable, the record player having base means on which the turntable and tone arm are supported, said apparatus including means for controlling the position of the pick-up supporting end of the tone arm in response to command signals, improved command signal generating means comprising: a rotatable control disc, said disc being mounted on the base means of the record player, said disc being provided with a recess in an exposed peripheral edge portion thereof; first command signal generating means mounted on said disc, said first command signal generating means including touch sensitive means positioned in said recess for producing an electrical output signal upon insertion of the finger of a user in said disc peripheral recess; means for coupling signals provided by said first command signal generating means to the position control means associated with the tone arm; second command signal generating means coupled to said disc, said second command signal generating means being operable in response to rotation of said disc under control of the user's finger in said disc peripheral recess to generate a second command signal; and means for coupling signals provided by said second command signal generating means to the position control means associated with the tone arm.
Claim 2
Dependent Claim
219 words
In apparatus for controlling the movements of the tone arm of a record player relative to a turntable, the record player having base means on which the turntable and tone arm are supported, said apparatus including means for controlling the position of the pick-up supporting end of the tone arm in response to command signals, improved command signal generating means comprising: a rotatable control disc, said disc being mounted on the base means of the record player, said disc being provided with a recess in an exposed peripheral edge portion thereof; first command signal generating means mounted on said disc, said first command signal generating means including touch sensitive means positioned in said recess for producing an electrical output signal upon insertion of the finger of a user in said disc peripheral recess; means for coupling signals provided by said first command signal generating means to the position control means associated with the tone arm; second command signal generating means coupled to said disc, said second command signal generating means being operable in response to rotation of said disc under control of the user's finger in said disc peripheral recess to generate a second command signal; and means for coupling signals provided by said second command signal generating means to the position control means associated with the tone arm.
Claim 3
Dependent Claim
43 words
The apparatus of claim 1 wherein said second command signal generating means comprises potentiometer means, rotation of said disc varying the position of a wiper arm of said potentiometer means with respect to a resistance element to thereby generate a second command signal.
Claim 4
Dependent Claim
51 words
The apparatus of claim 1 wherein said first command signal generating means comprises a pair of spacially displaced electrical contacts, the contacts of said pair being positioned within said disc peripheral recess so as to permit the establishment of an electrical circuit therebetween by a user's finger located in said recess.
Claim 5
Dependent Claim
50 words
The apparatus of claim 3 further comprising: third command signal generating means, said third command signal generating means comprising a pair of spacially displaced electrical contacts, the contacts of said third pair being positioned within said disc peripheral recess so as to permit the establishment of an electrical circuit therebetween.
Claim 6
Dependent Claim
44 words
The apparatus of claim 1 wherein said first command signal generating means comprises: pressure-sensitive transducer means mounted on said disc in said peripheral recess whereby manipulation of a user's finger in said recess may apply pressure to said transducer to generate a command signal.
Claim 7
Dependent Claim
50 words
The apparatus of claim 3 further comprising: third command signal generating means, said third command signal generating means comprising a pressure-sensitive transducer mounted on said disc in said peripheral recess whereby manipulation of a user's finger in said recess may apply pressure to said transducer to generate a command signal.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |