G - Physics – 11 – B
Patent
G - Physics
11
B
179/31, 181/60
G11B 3/00 (2006.01) H04R 9/16 (2006.01)
Patent
CA 1105392
PICK-UP ASSEMBLY FOR USE IN A RECORD PLAYER Abstract of the Disclosure A pick-up assembly carried directly by a tone arm or a cartridge adapted to be connected to the tone arm includes a vibrating section and magnetic circuit section. The vibrating section has a cantilever with one end carrying a stylus and the other end mounted in a support ring. A pair of ring-shaped moving coils are mounted on the support ring with the longitudinal axes of the coils in parallel and equidistantly spaced relation to the longitudinal axis of the support ring, and the coils are angularly spaced at right angles to each other about the longitudinal axis of the support ring. The magnetic circuit section has a permanent magnet sandwiched between front and rear yokes of magnetic material. The front yoke has a pair of leg portions extending downwardly for positioning the coils between the leg portions in spaced relation, while the rear yoke has a cylindrical support member carrying the support ring in such a manner as to allow the vibrating section to flex angularly, and a pair of poles of magnetic material are rigidly connected to the cylindrical support member and the rear yokes. Free end portions of the poles remote from the rear yoke are coaxially inserted into the coils, respectively, for forming a magnetic field between each of the poles and the corresponding one of the leg portions.
310235
Kirby Eades Gale Baker
Matsushita Electric Industrial Co. Ltd.
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