Keyless entry system
DCFirst Claim
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.
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Abstract
A keyless entry system is provided for locked or disabled items. A transmitter carried by a person generates a signal with a predetermined frequency characteristic such that the generated signal is transmitted through the carrier'"'"'s body. There is a receiver apparatus including a detector for detecting a signal with the predetermined frequency characteristic and a mechanism that is engageable by the carrier'"'"'s body for providing signals transmitted through the body to the detector. When such signals are detected, a circuit is activated to unlock or enable the item. An alarm system may be provided which sounds under certain predetermined conditions and a latching mechanism may be utilized to disarm the alarm under certain conditions.
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Citations
17 Claims
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1. A keyless entry system for locked doors comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A keyless entry system for locked doors comprising:
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signal generating means carried by a person and being separated from said person'"'"'s skin by an electrically insulating medium for generating an output signal with a predetermined frequency characteristic and sufficient 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, said signal generating means including a support, an oscillator mounted on said support, piezoelectric generator means connected to said oscillator means, and means, responsive to movement of said support, for deflecting said piezoelectric generator means to produce a voltage, which voltage drives said oscillator to generate said output signal; receiver means including detector means 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. - View Dependent Claims (16)
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17. A keyless entry system for locked doors comprising:
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signal generating means carried by a person and being separated from said person'"'"'s skin by an electrically insulating medium for generating an output signal with a predetermined frequency characteristic and sufficient 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, said signal generating means including a support, an oscillator mounted on said support, piezoelectric generator means connected to said oscillator means, and means, responsive to movement of said support, for deflecting said piezoelectric generator means to produce a voltage, which voltage drives said oscillator to generate said output signal; receiver means including detector means for detecting a signal with said predetermined frequency characteristic, and engagement means that are directly engageable by said remote porton of the person'"'"'s body for providing signals transmitted through the body to said detector means, said detector means including first and second filters for passing a generated signal with said predetermined frequency characteristic and amplifier means interconnected between said first and second filters for amplifying said signal that is passed by said first and second filters; and means, responsive to said detector means, for unlocking said door when a signal having said predetermined frequency characteristic is detected.
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Specification