Matsushita Electric Industrial Co., Ltd.

Junichi Ariga

Tugio Ohigashi

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.

Channel selection mechanism for an electronic tuner

This invention relates to a VHF-UHF switching mechanism of a television receiver provided with VHF and UHF tuners, and provides a VHF-UHF switching mechanism with a simple structure capable of selecting VHF and UHF channels by means of one main operation shaft.

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Inazawa, Japan

Junichi Ariga