Vehicle alarm system

• US 3,893,069 A
• Filed: 03/28/1974
• Issued: 07/01/1975
• Est. Priority Date: 03/28/1974
• Status: Expired due to Term

• Current Assignee: Robert L. Mason
• Original Assignee: Robert L. Mason
• Inventors: Mason, Robert L.
• Primary Examiner(s): Waring, Alvin H.
• Application Number:
  US05/455,114
• Time in Patent Office: 460 Days
• Field of Search: 340/52F,58,63,64,65,224 325/111,117 307/1AT
• US Class Current: 340/428
• CPC Class Codes: B60R 25/102 a signal being sent to a remote location, e.g. a radio signal being transmitted to a police station, a security company or the owner

Abstract

A vehicle alarm system energizes a tone generator which produces a signal transmitted by a radio transmitter when any of the passenger compartment doors, trunk cover and engine cover are opened without authorization. The signal is picked up by a radio receiver.

Claims

1. A vehicle alarm system for a vehicle having a battery, a passenger compartment having doors, a compartment lamp therein, a compartment circuit including the battery for electrically energizing the compartment lamp and a plurality of compartment switches, each at a corresponding one of the doors for closing the compartment circuit to energize the compartment lamp when a compartment door is opened, a trunk having a trunk cover, a trunk lamp therein, a trunk circuit including the battery for electrically energizing the trunk lamp, a trunk switch at the trunk cover for closing the trunk circuit to energize the trunk lamp when the trunk cover is opened, and an engine area for an engine, said engine area having an engine cover, an engine lamp therein, an engine circuit including the battery for electrically energizing the engine lamp and an engine switch at the engine cover for closing the engine circuit to energize the engine lamp when the engine cover is opened, said alarm system comprising radio transmitting means for transmitting signals;

tone generating means connected to the transmitting means for producing signals and supplying the signals to the transmitting means for transmission; and

energizing means coupling the tone generating means to the compartment, trunk and engine circuits for energizing the tone generating means to produce signals when a circuit is closed, the energizing means comprising power supply means connected to the battery for producing a voltage for energizing the tone generating means, a relay switch connected between the power supply means and the tone generating means for controlling the energization of the tone generating means and a relay winding connected in parallel with the compartment, trunk and engine lamps for controlling the operation of the relay switch for closing the relay switch to connect the tone generating means to the power supply means when a lamp is energized.

2. A vehicle alarm system as claimed in claim 1, further comprising radio receiving means for receiving signals transmitted by the transmitting means.

3. A vehicle alarm system as claimed in claim 2, wherein the radio transmitting and receiving means comprise a walkie-talkie set.