ANTITHEFT DEVICE FOR MOTOR VEHICLES

• US 3,603,750 A
• Filed: 10/02/1969
• Issued: 09/07/1971
• Est. Priority Date: 10/03/1968
• Status: Expired due to Term

• Current Assignee: Walo Beier
• Original Assignee: Walo Beier
• Inventors: Beier, Walo
• Primary Examiner(s): Schaefer, Robert K.
• Assistant Examiner(s): Hohauser, H. J.
• Application Number:
  US04/863,246
• Time in Patent Office: 705 Days
• Field of Search: 200/61.19,153.14,42,44 340/64 307/1AT
• US Class Current: 200/43.08
• CPC Class Codes: B60R 25/04 operating on the propulsion system, e.g. engine or drive motor

Abstract

This invention relates to an antitheft device, particularly for motor vehicles, which comprises a lockable current switch which can be built into the HT circuit of the ignition system of the vehicle. The device may be inserted in the supply to the distributor or the HT winding of the ignition coil.

Claims

1. An antitheft device particularly for motor vehicles having an interrupter secured against unauthorized interference in the high tension circuit of the ignition system between the ignition coil and the distributor comprising a securely fixed casing in said circuit 1, 30 having an interrupter chamber 6, 31, a safety lock in said chamber, an insulating element 7, 32 having a conductor bridge 18, 37 controlled by said safety lock, insulating means 20, 38 on said insulating element for increasing the current gap in said chamber movable between two end positions, a pair of contact arms connected in said circuit extending into said chamber having contacts 10, 11, 33, 34, said contacts being located upon opposite sides of said insulating element so that said insulating element in one position of said end positions in the interrupter casing is lockable by said safety lock 5, 39 to break said high tension circuit and said conductor bridge 18, 37 and in the other of said end positions establishes a connection between said contacts and with one of said contact arms for reestablishing said high tension circuit between the ignition coil and the distributor.

2. A device as set forth in claim 1, wherein said casing is provided with a connecting portion having an opening, an insulating bushing in said opening surrounding the high tension input of said high tension circuit and a connecting means between the inside wall of said connecting portion and the external surface of said insulating bushing.

3. A device as set forth in claim 2, wherein said connecting means is a self-cutting anchoring member preventing the joint between said connection portion and said bushing from being undone.

4. A device as set forth in claim 2, wherein said connection portion is integral with the distributor head.

5. A device as set forth in claim 2, wherein said connecting portion is integral with the output side of the ignition coil.

6. A device as set forth in claim 2, wherein one of said contact arms is directly connected with the central contact member of the distributor.

7. A device as set forth in claim 2, wherein one of said contact arms is directly connected to the insulated end of the high tension winding of the ignition coil.

8. A device as set forth in claim 1, wherein said insulating element is a rotatable disk of insulating material, a shaft on which said disk is rotatably mounted in said chamber, and means connecting said shaft with said safety lock.

9. A device as set forth in claim 8, wherein said disk is fitted with a contact pin traversing said disk substantially parallel to said shaft, said contact pin forming said conductor bridge.

10. A device as set forth in claim 8, wherein said disk is provided with an insulating coil forming said insuLating means.

11. A device as set forth in claim 1, wherein said interrupter is a rotatable insulating cylinder having a conducting element for the high tension circuit.

12. A device as set forth in claim 11, wherein said cylinder is rotatably mounted in said chamber and is coupled to a drive member releasable by said safety lock for the transmission of rotation.

13. A device as set forth in claim 11, wherein said insulating cylinder has a helical insulating fin on its peripheral surface.