1976-11-01
1977-10-18
Stephan, Steven L.
Undertaking
17910041M, 17910041Z, 274 37, G11B 302, H04R 916, H04R 1112
Patent
active
040547582
ABSTRACT:
A sound pickup, for tracking mechanically modulated grooves in a record support by means of a tracing stylus, includes a stylus holder elastically mounted, at its center of motion, in a bearing element of rubber or rubber-like material. A small metal plate is embedded in the bearing element to extend perpendicularly to the longitudinal axis of the stylus holder, and has a central opening therein. The stylus holder passes through the central opening and the diameter of the central opening is slightly larger than the external diameter of the stylus holder in the zone of its passage through the central opening. The thickness of the plate is small relative to such external diameter of the stylus holder, and the stylus holder is connected to the plate only through the bearing element. The bearing element is preferably a body of revolution extending to either one or both sides of the plate, with the plate being situated in the plane of the largest diameter of the bearing element, and the bearing element has a passage extending therethrough coaxial with the central opening in the plate and with the diameter less than that of the central opening in the plate.
REFERENCES:
patent: 2483196 (1949-09-01), Gordon
patent: 3040136 (1962-06-01), Grado
patent: 3538266 (1970-11-01), Cho
patent: 3641284 (1972-02-01), Westerkamp et al.
A New Suspension System for Phono Styli, Fidi, Audio, 3/76, pp. 24, 27, 28.
AKG Akustische u. Kino-Gerate Gesellschaft m.b.H.
Stephan Steven L.
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