Two piece radio telephone

Claim 1

A multi-piece radio telephone, comprising a basic unit, first unit and second unit, said basic, first and second units being entirely separable from each other, the basic unit having low power circuit elements therein including a radio receiver, a signal portion of a radio transmitter including signal generation circuits for producing a low power modulated radio frequency signal for subsequent transmission by a power portion, and logical functions of a telephone, the first unit including a first power supply capable of operating from at least one of an accumulator, battery and an external power supply, a first power portion of said radio transmitter comprising a first transmitter power stage, first separation means for separating received radio frequency signals from said low power modulated radio frequency signals for subsequent radio transmission, the separated signals moving between said basic unit and said first unit by separate conductive paths when said basic unit is physically connected to said first unit, said second unit being operable independently of said first unit, said second unit including a second power supply capable of operating from at least one of an accumulator, battery and an external power supply, a second power portion of said radio transmitter comprising a second transmitter power stage, and second separation means for separating received radio frequency signals from said low power modulated radio frequency signals for subsequent radio transmission, said second transmitter power stage of said second unit having a higher power output than said first transmitter power stage of said first unit, said first unit and said second unit being subject to interchangeable independent connection with said basic unit, and said first and second power supplies, transmitter power stages and separation means being absent from said basic unit.