Anti-evasion system for vehicle unsupervised breath testers

Claim 1

I n a motor vehicle equipped with a breath tester of the type designed to be used by the driver of the motor vehicle, and also of the type that affects the operation of the vehicle unless and until the breath test is taken and passed, and which tester requires the user thereof to blow breath into an input thereof, said vehicle also having a dash easily visible from the outside of the vehicle, the improvement of an anti-evasion system comprising: a free hand station positioned remotely from the breath input and adapted to be activated by a free hand of the driver; and means, responsive to the activation of the free hand station, to allow the breath tester to be successfully operated but to prevent the passing of the test in the absence of the activation of said station, in which said means includes a signal generator for producing signals in response to the activation of said station, and a receiver for said signals of said signal generator, said receiver including means for allowing a pass output from said tester in response to the reception of said signals of said generator, said generator and receiver being positioned to employ a subject''s body as a transmission media.