Radio alarm

• US 3,149,317 A
• Filed: 07/13/1960
• Issued: 09/15/1964
• Est. Priority Date: 07/13/1960
• Status: Expired due to Term

• Current Assignee: Frank J. Brugliera, Louis E. Pepperberg
• Original Assignee: Frank J. Brugliera, Louis E. Pepperberg
• Inventors: Brugliera, Frank J., Pepperberg, Louis E.
• Application Number:
  US04/042,535
• Time in Patent Office: 1,525 Days
• US Class Current: 340/527
• CPC Class Codes: G08B 23/00 Alarms responsive to unspecified undesired or abnormal conditions

Claims

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.