Keyless entry system

DETAILED DESCRIPTION What is claimed is: 1.
A keyless entry system for locked doors comprising: signal generating means carried by a person and being completely separated by an electrically insulating medium from said person's skin for generating an output signal with a predetermined frequency characteristic and sufficient signal strength such that said generated signal is transmitted across said medium and through the person's body to a remote portion of the body spaced apart from said signal generating means; receiver means including detector means having sufficient gain for detecting a signal with said predetermined frequency characteristic, and engagement means that are directly engageable by said remote portion of the person's body for providing signals transmitted through the body to said detector means; and means, responsive to said detector means, for unlocking said door when a signal having said predetermined frequency characteristic is detected.
2.
The system of claim 1 in which said engagement means include primary contact means that are selectively engageable by the carrier for receiving transmitted signals therefrom, primary switch means which are operated by engagement of said primary contact means, and means, responsive to operation of said primary switch means, for electrically interconnecting said primary contact means and said detector means.
3.
The system of claim 2 further including primary timing means, means, responsive to operation of said primary switch means for initiating said primary timing means, and means, responsive to timing out of said primary timing means for relocking said door.
4.
The system of claim 2 in which said means for unlocking include a pulse generator, means responsive to operation of said switch means for driving said pulse generator to generate an electric pulse, and a solenoid, responsive to the generation of an electric pulse from said pulse generator, for unlocking said door.
5.
The system of claim 1 in which said signal generating means include oscillator means, said output signal includes a signal with a predetermined frequency range and said means for detecting include complementary filter means for passing a generated signal within said predetermined frequency range