Channel selection mechanism for an electronic tuner

Details Channel selection mechanism for an electronic tuner Channel selection mechanism for an electronic tuner

1976-06-24

1977-11-01

Gensler, Paul L.

Tuners

Tuner unit directly responsive to voltage and/or current...

Reactance tuning

325459, 325464, 334 87, 74 1029, H03J 318, H03J 102

Patent

active

040567940

ABSTRACT:
A channel selection mechanism for an electronic tuner of a television receiver comprises a motor-driven shaft, a voltage selection rotary switch with the contact arm mounted on the shaft, a channel number indicating drum mounted on the shaft for rotation with the rotary switch, a cam wheel having notches on the periphery thereof and mounted on the shaft for rotation with the rotary switch and the drum, and a cam follower pivoted at one end to engage the working surface of the cam wheel to provide swivel movements. The motor is energized by a motor start switch which is operated until a desired channel is reached. A motor stop switch is provided to operate in response to the swivel movements of the cam follower to deenergize the motor to precisely align the channel indicating number to a window provided in the receiver housing.

REFERENCES:
patent: 3740679 (1973-06-01), Kimura et al.
patent: 3845428 (1974-10-01), Wada et al.
patent: 3855962 (1974-12-01), Uchida et al.

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