Radio alarm
First Claim
1. IN A RADIO ALARM SYSTEM FOR INDICATING OPERATION OF UNITS EACH OPERATING A SWITCH IN RESPONSE TO AN ALARM CONDITION, A TRANSMITTER UNIT ASSOCIATED WITH EACH SWITCH AND INCLUDING IN COMBINATION, A HOUSING, ELECTRONIC EQUIPMENT WITHIN SAID HOUSING INCLUDING, A TIMER, MEANS FOR COUPLING SAID TIMER TO THE SWITCH FOR ACTUATION OF SAID TIMER THEREBY, A PLURALITY OF TONE OSCILLATORS PROVIDING TONES OF DIFFERENT FREQUENCIES, FIRST, SECOND AND THIRD SWITCH MEANS OPERATED BY SAID TIMER, AND A TRANSMITTER MODULATOR MEANS, SAID FIRST SWITCH MEANS APPLYING ENERGIZING POTENTIAL TO SAID TONE OSCILLATORS FOR A FIRST PERIOD, SAID SECOND SWITCH MEANS APPLYING ENERGIZING POTENTIAL TO SAID MODULATOR MEANS FOR A PLURALITY OF SPACED PERIODS WITHIN SAID FIRST PERIOD, AND SAID THIRD SWITCH MEANS SELECTIVELY APPLYING TONES FROM SAID TONE OSCILLATORS TO SAID MODULATOR MEANS, WHEREBY A PULSED TONE SIGNAL IS REPEATEDLY TRANSMITTED FOR A PREDETERMINED TIME DURATION.
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Accused Products
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Citations
1 Claim
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1. IN A RADIO ALARM SYSTEM FOR INDICATING OPERATION OF UNITS EACH OPERATING A SWITCH IN RESPONSE TO AN ALARM CONDITION, A TRANSMITTER UNIT ASSOCIATED WITH EACH SWITCH AND INCLUDING IN COMBINATION, A HOUSING, ELECTRONIC EQUIPMENT WITHIN SAID HOUSING INCLUDING, A TIMER, MEANS FOR COUPLING SAID TIMER TO THE SWITCH FOR ACTUATION OF SAID TIMER THEREBY, A PLURALITY OF TONE OSCILLATORS PROVIDING TONES OF DIFFERENT FREQUENCIES, FIRST, SECOND AND THIRD SWITCH MEANS OPERATED BY SAID TIMER, AND A TRANSMITTER MODULATOR MEANS, SAID FIRST SWITCH MEANS APPLYING ENERGIZING POTENTIAL TO SAID TONE OSCILLATORS FOR A FIRST PERIOD, SAID SECOND SWITCH MEANS APPLYING ENERGIZING POTENTIAL TO SAID MODULATOR MEANS FOR A PLURALITY OF SPACED PERIODS WITHIN SAID FIRST PERIOD, AND SAID THIRD SWITCH MEANS SELECTIVELY APPLYING TONES FROM SAID TONE OSCILLATORS TO SAID MODULATOR MEANS, WHEREBY A PULSED TONE SIGNAL IS REPEATEDLY TRANSMITTED FOR A PREDETERMINED TIME DURATION.
Specification