Remote control system for electric apparatus
First Claim
1. A remote control system wherein plural functions of electric apparatus are selectively controlled in accordance with a received command signal having a single frequency and repetitive transmission periods, the duration of a transmission period being determinative of a particular function, comprising:
- receiving means for receiving said command signal;
detecting means coupled to said receiving means for producing pulses having durations corresponding to the durations of the received transmission periods of said received command signal;
measuring means coupled to said detecting means for measuring the duration of each produced pulse and for selectively producing one of a plurality of output pulses in accordance with the measured duration of said produced pulse;
counter means coupled to said measuring means for counting the consecutive number of each of said output pulses produced by said measuring means to thereby provide a count of the number of consecutive repetitions of transmission periods having the same duration which are received by said receiving means; and
control signal generating means coupled to said counter means for generating one of a plurality of control signals depending upon the output pulses produced by said measuring means and only if said counter means counts at least a predetermined number of said output pulse representing that at least said predetermined number of consecutive repetitions of a command signal having a selected transmission period has been received, said generated control signal being adpated to control a selected function.
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Abstract
A remote control system for selectively controlling plural functions of electric apparatus comprising a combination of an improved transmitter for generating a command signal of a single frequency which is transmitted intermittently for a plurality of intervals of time, the length of each of which is determined in response to selection of one of the plural functions, and a receiver for receiving the command signal and producing a control signal for controlling the selected function in response to the length of each of the intervals and to the number of the intervals of the received command signal.
32 Citations
10 Claims
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1. A remote control system wherein plural functions of electric apparatus are selectively controlled in accordance with a received command signal having a single frequency and repetitive transmission periods, the duration of a transmission period being determinative of a particular function, comprising:
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receiving means for receiving said command signal; detecting means coupled to said receiving means for producing pulses having durations corresponding to the durations of the received transmission periods of said received command signal; measuring means coupled to said detecting means for measuring the duration of each produced pulse and for selectively producing one of a plurality of output pulses in accordance with the measured duration of said produced pulse; counter means coupled to said measuring means for counting the consecutive number of each of said output pulses produced by said measuring means to thereby provide a count of the number of consecutive repetitions of transmission periods having the same duration which are received by said receiving means; and control signal generating means coupled to said counter means for generating one of a plurality of control signals depending upon the output pulses produced by said measuring means and only if said counter means counts at least a predetermined number of said output pulse representing that at least said predetermined number of consecutive repetitions of a command signal having a selected transmission period has been received, said generated control signal being adpated to control a selected function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification