Invention Grant
US3886307A On-off system for television receivers 失效
电视接收机的开 - 关系统

On-off system for television receivers
Abstract:
A television receiver having push buttons numerically labelled 0 through 9 for operatively selecting a television channel is switched on or off without the aid of a particularized manual onoff switch. Depression of channel selection push buttons activates the power to the main portion of the television receiver concurrently setting it to a desired television channel. Further depression of the push buttons selecting a particular number which does not correspond to any existent channel operatively switches the main portion of the television receiver off.
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