Automatic channel scanning attachment for manual CB radio transceiver

Claim 1

A universal automatic channel scanning attachment for a wide variety of manual channel selector CB radio transceivers adapted to be responsive to squelch circuits that produce squelch signals of positive or negative polarity when the transceivers are not tuned to active channels to enable each transceiver with an attachment to automatically scan the CB frequency channels and tune the transceiver in an active channel; said attachment comprising: a chassis separated from the CB radio transceiver; an input electrical wire mounted to the chassis and adapted for extending to the CB radio transceiver and electrically connecting to the transceiver squelch circuit to transmit the squelch signal to the chassis; a signal polarity network mounted to the chassis and electrically coupled to the input electrical wire for generating a process signal in response to the receipt of the positive or negative squelch signal; a scanning control network mounted in the chassis and electrically coupled to the signal polarity network for generating a channel scanning signal in response to the squelch signal; and channel selector actuating means electrically coupled to the scanning control network and adapted to be operatively connected to the manual channel selector of the CB radio transceiver for actuating the manual channel selector to automatically scan the CB channels when the channel scanning signal is generated.