Radio alarm security system

• US 5,774,050 A
• Filed: 03/09/1995
• Issued: 06/30/1998
• Est. Priority Date: 03/24/1994
• Status: Expired due to Fees

• Current Assignee: Trigress Elektro AG
• Original Assignee: Baumer Holding AG
• Inventors: Kagi, Rene
• Primary Examiner(s): Crosland, Donnie L.
• Application Number:
  US08/401,620
• Time in Patent Office: 1,209 Days
• Field of Search: 340/539, 340/531, 340/526, 340/527, 340/693, 341/176
• US Class Current: 340/539.11
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence

Abstract

The radio alarm security system, particularly for the protection of persons within a building against intruders, includes a mobile central alarm unit which is provided with a separate power source and is temporarily connectable to at least one charging station, and includes a receiver unit for the radio signals of alarm indicators, with a transmitter unit for producing radio signals for activating alarm generators as well as with an optical and acoustic display device for the received radio signals and at least hand-activatable initiating device for the radio signals activating the alarm generators.

Claims

1. A radio alarm security system, comprising:

a portable central alarm unit, including;

a separate, rechargeable power source temporarily connectable to at least one charging station for charging the power source;

a receiving assembly, including;

a receiver unit for receiving radio signals generated from alarm indicators indicating an alarm condition; and

optical and acoustic display means connected with said receiver unit and being activatable as a result of the radio signals for alerting a user of the alarm condition; and

a transmitting assembly, including;

a hand-activatable initiating means for initiating additional radio signals; and

a transmitter unit connected with said initiating means for transmitting the additional radio signals to activate an alarm generator.

2. The radio alarm security system defined in claim 1, wherein said system protects persons within a building against intruders.

3. The radio alarm security system defined in claim 1, wherein said initiating means comprises a hand-operated key being operatable for initiating the additional radio signals to activate the alarm generators, said transmitting assembly further comprising a time-delay stage electrically connected to said key to prevent an initiation of the alarm generator due to an inadvertent quick pressing of said key, a timer electrically connected with said time-delay stage and said transmitter unit for switching on said transmitter unit for a defined period of time, and an encoder stage electrically connected downstream to said timer for producing a plurality of data messages.

4. A The radio alarm security system defined in claim 1, wherein said receiving assembly includes a plurality of decoders electrically connected with said receiver unit for receiving data messages.

5. The radio alarm security system defined in claim 1, further comprising a test oscillator having a timer and encoder for initiating and transmitting to said portable central alarm unit in intervals a plurality of serial test messages.