AUTO THEFT PROTECTION SYSTEM

• US 3,637,037 A
• Filed: 11/24/1969
• Issued: 01/25/1972
• Est. Priority Date: 11/24/1969
• Status: Expired due to Term

• Current Assignee: Charles M. Doland, George D. Doland, George J. Doland
• Original Assignee: Charles M. Doland, George D. Doland, George J. Doland
• Inventors: Doland, George J., Doland, George D., Doland, Charles M.
• Primary Examiner(s): Hersh, Benjamin
• Assistant Examiner(s): Silverstrim, John P.
• Application Number:
  US04/879,346
• Time in Patent Office: 792 Days
• Field of Search: 180/114 340/63,64
• US Class Current: 180/287
• CPC Class Codes: B60R 25/1003 Alarm systems characterised by arm or disarm features

Abstract

An automobile antitheft device which sounds an alarm and makes the automobile inoperative even when the automobile is '"'"''"'"''"'"''"'"'hot wired'"'"''"'"''"'"''"'"' or the ignition keys are available to the thief. A multiposition ignition switch has a first terminal which completes a circuit to energize a first relay to enable normal starting and operation; and a number of other terminals which complete a circuit to energize a second relay which energizes an alarm and other circuits for making the automobile inoperative.

Claims

1. A protection system comprising a multiposition control switch, an ignition relay controlled by said multiposition switch using vehicle battery power via the said vehicle ignition switch in the start position and said multiposition switch in the correct position, an alarm relay controlled by said multiposition switch using vehicle battery power via the vehicle ignition switch in the start position and said multiposition switch in an incorrect position, a relay contact means to latch said ignition relay in the energized position utilizing vehicle battery power via the vehicle ignition switch in the ignition on position, a relay contact means for latching said alarm relay in the energized position using vehicle battery power, a relay contact means for providing vehicle battery power to an alarm when the alarm relay is energized, a relay contact means for disabling the vehicle ignition system when the ignition relay is deenergized, a relay contact means for energizing the alarm relay when a hot wire jumper is connected between the vehicle battery and vehicle ignition coil terminal, and a terminal provided or the return power lead of said alarm relay and said ignition relay, to said terminal is connected one lead of a reset switch, the other lead from said reset switch is connected to the vehicle ground.

2. A protection system as described in claim 1 wherein said alarm relay provides a means to disable the vehicle ignition system.

3. A protection system as described in claim 1 wherein a terminal is provided for connecting at least one auxiliary device to disable the vehicle, said terminal being connected to said alarm circuit which controls vehicle power to said auxiliary device.

4. A protection system as described in claim 1 wherein a terminal is provided for connecting at least one sensor to detect unaUthorized tampering with the vehicle, said terminal being connected to the ignition circuit relay contact to provide power through said contacts to said alarm relay.

5. A protection system comprising a multiposition control switch, an ignition relay controlled by said multiposition switch using vehicle battery power via the vehicle ignition switch in the start position and said multiposition switch in the correct position, an alarm relay controlled by said multiposition switch using vehicle battery power via the vehicle ignition switch in the start position and said multiposition switch in an incorrect position, a relay contact means to latch said ignition relay in the energized position utilizing vehicle battery power via the vehicle ignition switch in the ignition on position, a relay contact means for latching said alarm relay in the energized position using vehicle battery power, a relay contact means for providing vehicle battery power to an alarm when the alarm relay is energized, a relay contact means for disabling the vehicle ignition system when the ignition relay is deenergized, a relay contact means for energizing the alarm relay when a hot wire jumper is connected between the vehicle battery and vehicle ignition coil terminal, and a starter circuit diode in series with the lead to said multiposition switch wiper contact preventing electric current from operating the vehicle starter contactor when the vehicle ignition switch is in the ignition on position after an attempt is made to start the vehicle engine.

6. A protection system comprising a multiposition control switch, an ignition relay controlled by said multiposition switch using vehicle battery power via the vehicle ignition switch in the start position and said multiposition switch in the correct position, an alarm relay controlled by said multiposition switch using vehicle battery power via the vehicle ignition switch in the start position and said multiposition switch in an incorrect position, a relay contact means to latch said ignition relay in the energized position utilizing vehicle battery power via the vehicle ignition switch in the ignition on position, a relay contact means for latching said alarm relay in the energized position using vehicle battery power, a relay contact means for providing vehicle battery power to an alarm when the alarm relay is energized, a relay contact means for disabling the vehicle ignition system when the ignition relay is deenergized, a relay contact means for energizing the alarm relay when a hot wire jumper is connected between the vehicle battery and vehicle ignition coil terminal, and a horn circuit diode in series with the lead to the vehicle horn, when the vehicle horn is used as an alarm, preventing said alarm relay from being energized when the vehicle horn is sounded.