Channel selection mechanism for an electronic tuner

摘要

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.