Auto theft prevention

A system for preventing unauthorized operation of an automobile with an automobile engine which comprises:

• a transmitter means locatable with an operator, for broadcasting a start signal from said transmitter means, initiated by said operator wherein said transmitter means comprises:
• a power supply (10) for providing direct current voltage;
• an oscillator circuit means (15) for generating a start signal when said oscillator circuit (15) is coupled to said power supply (10);
• a start switch connected between said oscillator circuit and said power supply wherein said oscillator generates said start signal when said start switch is closed;
• an antenna means (17), coupled to said oscillator means (15) arranged for broadcasting said start signal;
• and
• said system comprises:
• a receiver means, locatable with said automobile engine, for generating resonant energy when said receiver means receives said start signal wherein said receiving means comprises:
• a receiving antenna (20) arranged for receiving said start signal from said oscillator;
• a tank circuit means (23) coupled to said receiving antenna (20) and arranged for providing that said tank circuit means (23) generates a resonating signal in response to receiving said oscillator signal;
• a rectifier means (28) coupled to said tank circuit (23) for converting said resonating signal to a direct current (d.c.) starter signal;
• and said system comprises a clutch means (45) coupled to said rectifier means (28) for coupling said starter to a drive shaft of said engine when said drive shaft of said engine is turning below a critical rate and decoupling said starter motor from said drive shaft when a rotational rate of said drive shaft is greater than said critical rate.