Circuit for disabling a radio transmitter which is continuously operated longer than a predetermined time

摘要

A timer and fuse circuit are provided with a radio transmitter for blowing the fuse if the transmitter is continuously operated longer than a predetermined time. After the fuse is blown, the transmitter cannot be operated until a technician replaces the fuse. This prevents operators from causing willful interference for long periods of time, and provides means for detecting those operators who cause such interference.