Phonograph cartridge and sensor assembly

Details Phonograph cartridge and sensor assembly Phonograph cartridge and sensor assembly

1976-07-30

1978-10-10

Tokar, M.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

1791004D, 17910041K, G01D 534

Patent

active

041198441

ABSTRACT:
A phonograph cartridge is provided for use on a programmable phonograph turntable or changer. The cartridge includes a housing for mounting an electro-mechanical transducer on the end of a phonograph tone arm and a stylus connected to the electro-mechanical transducer for the reproduction of audio information contained in the groove of a record carrier. A sensor including a light source and a photodetector is mounted on the housing in a position in close proximity to the stylus to provide a unitary cartridge and sensor assembly. The stylus and sensor elements are mounted on a subframe portion which is removable from the housing to facilitate replacement of the stylus or sensor without requiring replacement of the entire phonograph cartridge.

REFERENCES:
patent: 3368080 (1968-02-01), Nakagiri et al.
patent: 3646279 (1972-02-01), Stanton
patent: 3745263 (1973-07-01), Kawakami

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