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US 5,293,150 AGranted
Circuit arrangement of an anti-theft alarm
AssigneeMercedes-Benz AG
InventorsKlaus Neuffer, Helmut Grickscheit
Life of this patent
Estimating the term…
Abstract
A circuit arrangement for an anti-theft alarm for vehicles which emits optical signals to the outside by means of the driving direction indicator lights of the vehicle and also permits driving direction changes to be displayed. Actuation of the indicator lights is cancelled by the anti-theft alarm for the duration of the direction flashing indication.
Claims11
Circuit arrangement for an anti-theft alarm for a vehicle, comprising:
- light sources on said vehicle which are activatable via lines by the circuit arrangement as well as by externally supplied electrical signals;
- and a control unit, that controls the anti-theft alarm, the control unit having a clock generator therein for intermittently and cyclically activating said light sources via said lines upon occurrence of an alarm and having control logic coupled to said lines for detecting an externally supplied electrical signal occurring on said lines and for suppressing the cyclical activating of said light sources with the clock generator for a predetermined amount of time upon the detection of the externally supplied electrical signal.
Dependencies are inferred from the claim text.