Wireless alarm system

• US 4,363,031 A
• Filed: 07/07/1980
• Issued: 12/07/1982
• Est. Priority Date: 07/07/1980
• Status: Expired due to Term

• Current Assignee: Jack Reinowitz
• Original Assignee: Jack Reinowitz
• Inventors: Reinowitz, Jack
• Primary Examiner(s): Waring, Alvin H.
• Application Number:
  US06/166,162
• Time in Patent Office: 883 Days
• Field of Search: 340/539, 340/508, 340/514, 340/517, 340/521, 340/577, 340/584, 340/628, 340/629, 340/630
• US Class Current: 340/539.26
• CPC Class Codes: G08B 1/08 using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: G08B 3/10 using electric transmission; using electromagnetic transmission

Abstract

A wireless smoke alarm system in which each detector includes a local smoke detector and an alarm. These are coupled to a transmitter and a receiver. The transmitter and receiver are within range of similar units so that an alarm sounded by one unit causes those within range to sound their respective alarms. In sounding their respective alarms, the local units also cause their transmitters to transmit alarm signals thereby overlapping and reinforcing the first unit. A master control is coupled between the alarm detection and local alarm portion and the transceiver to disconnect the unit when the alarm is ended and to transmit a signal to other units, causing each to discontinue their respective alarms.

Claims

1. A detection system of the type intended to detect the occurrence of a local phenomena, and transmit at least one signal to other detectors to remotely sound an alarm, said system comprising:

I. a first detector which comprises;

a. first means for sensing the occurrence of the predetermined phenomena and generating a signal;

b. first means responsive to said signal from said first sensing means for generating a local alarm to thereby indicate the occurrence of the phenomena; and

c. first transmitting means electrically coupled and responsive to said signal from said first sending means to thereby wirelessly transmit a first signal indicative of the predetermined phenomena; and

II. at least a second detector which comprises;

a. second receiving means for receiving said first signal from said first transmitter and generating a signal;

b. second means responsive to said signal from said second receiving means for generating a separate local alarm to thereby indicate the occurrence of the phenomena; and

c. second transmitting means, responsive to said signal from said second receiving means, for wireless transmission of said first signal; and

III. at least a third detector which comprises;

a. third receiving means for receiving said first signal from either said first or second transmitting means and generating a signal; and

b. third means electrically responsive to said signal generated by said third receiving means for generating a separate local alarm to thereby indicate the occurrence of the phenomena.

2. A detection system as recited in claim 1 wherein said third detector further comprises third transmitting means responsive to said first signal to thereby transmit said first signal by wireless transmission.

3. A detection system as recited in claim 2 wherein said first, second and third detectors comprise first, second, and third master control system respectively;

said master control system, wherever mentioned, being electrically coupled to said respective transmitter in said detector, wherever mentioned, to be capable to cause said transmitter to transmit a second wireless signal upon the termination of the local phenomena;

said receiving means wherever mentioned, upon receiving said second signal, and in combination with said master control electrically coupled thereto, causing said generating means to terminate said local alarm.

4. A detection system as recited in claim 3 wherein said transmitting means, wherever mentioned, comprises a wireless radio transmitter;

said receiving means, wherever mentioned, comprises a wireless radio receiver;

said generating means, wherever mentioned, comprises an electrically operated local alarm.

5. A detection system as recited in claim 4 wherein said second and third detector further comprise second and third sensing means, each coupled to said respective transmitting means and master control.

6. A detection system as recited in claim 5 wherein said sensing means, wherever mentioned, comprises a smoke detector.

7. A detection system as recited in claim 5 wherein said sensing means, wherever mentioned, comprises a flame detector.

8. A detection system as recited in claim 5 wherein said sensing means, wherever mentioned, comprises a burglar alarm.

9. A detection system as recited in claim 5 wherein said sensing means, wherever mentioned, comprises a gas detector.

10. A detection system as recited in claims 6, 7, 8, or 9 wherein said first, second, and third detectors being battery operated.

11. A detection system as recited in claim 10 wherein said detectors each comprise a local test means for disconnecting said transmitter and receiver from said alarm and sensing means to cause said sensing means to operate to thereby provide a local test that said battery, said sensing means, and said alarm are locally operative.