TV channel selector assembly

Details TV channel selector assembly TV channel selector assembly

1975-06-26

1976-03-09

Griffin, Robert L.

Tuners

Tuner unit with electromagnetic operator

Predetermined center frequency selector

325455, 325459, 334 15, H03J 504

Patent

active

039434516

ABSTRACT:
A TV channel selector assembly includes a keyboard having ten keys corresponding to the decimal numbers zero through nine, inclusive. The desired channel may be selected merely by activating the appropriately numbered keys, there being no other keys required to be activated to effect a channel change. After activation of the first key, which may be either a units digit channel or the tens digit of a two digit channel, a delay circuit defines a timed interval of about two seconds. Each keyboard output is encoded into a four digital word. A control device transfers the first digital word to a units channel input if a second key is not activated during the timed interval. If a second key is activated during the timed interval, the first digital word is transferred to a tens channel output, and the second digital word is transferred to the units channel output.

REFERENCES:
patent: 3866112 (1975-02-01), Yokoyama et al.
patent: 3902121 (1975-08-01), Yoshino et al.

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