| 摘要 |
A wrist unit (11) includes a transmitting circuit (47) capable of producing coded radio frequency to the users body and causes the encoded signal (52) t o propagate through the users (20) body as a transferring medium. A cooperatin g device (43) includes a receiving contact (12) which the user touches to impa rt the body signal. A receiver (12) and decoder (54) within the cooperating device identify the user and enable a gate circuit )55) which in turn opens access to the user (20) of the microprocessor (50) and cooperating circuitry (41) within the unit (11). In the absence of a code match, the access to the cooperating device is refused.
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