(57) A system for remotely controlling operation of a device has a transmitter unit (Figure
1) and a receiving unit (Figure 2). The transmitter unit has a circuit (2) which produces
a control signal when the system is being operated, and transmitter circuit (6, 10,
11) for repeatedly transmitting the control sianal. The receiver unit has a receiving
circuit (20, 2, 22) which receives the transmitted signal, and operation control circuit
(24-30) responsive to the received signal for initiating operation of the device and
maintaining operation of the device provided the transmitted control signal continues
to be received.
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