| 摘要 |
A remote location actuator that is adapted to receive an input signal, to ascertain whether or not the input signal contains a message upon which the actuator should act, and to effect some predetermined act upon receipt of an appropriate message. By way of illustration, the signal may be in the form of, say, two trains of pulses that may be produced by a telephone bell, the message being contained in the number of pulses in each train. Input to the actuator may be in the form of electromagnetic transfer from the telephone.
|
