Vehicle alarm system
AssigneeWico Corporation
InventorDavid A. Geller
Life of this patent
Estimating the term…
Abstract
Pick-up means convert mechanical vibrations into an electrical signal at a corresponding frequency. The pick-up means is attached to a portion of the vehicle, which is mechanically coupled to the hubcap or wheel cover. A circuit responds to the electrical signal to provide an operating signal to generate an alarm.
Claims6
A vehicle alarm system for providing an operating signal to operate an alarm generator when a predetermined part of the vehicle is being removed, said vehicle alarm system comprising pick-up means for converting mechanical vibrations into an electrical signal at frequencies corresponding to the frequencies of the mechanical vibrations, means for attaching said pick-up means to a portion of the vehicle which is mechanically coupled to the predetermined part, filter means coupled to said pick-up means to provide a filter signal only in the presence of an electrical signal with frequencies exceeding a predetermined frequency, comparator means coupled to said filter means and being responsive to a filter signal exceeding a predetermined amplitude to provide a comparator signal, and circuit means coupled to said comparator means and being responsive to the comparator signal to provide an operating signal to operate the alarm generator.
Dependencies are inferred from the claim text.