Radiotelephone proximity detector
First Claim
1. A radiotelephone proximity detector, comprising:
- a first proximity unit having a receiver and a second proximity unit having a transmitter, one of the units being associated with a radiotelephone and one of the units being associated with a user;
means for coupling said units together in a home position;
means for detecting when the units are coupled together in the home position and when the units become uncoupled from the home position, and for providing a first signal and a second signal respectively indicative thereof;
means, responsive to the second signal, for causing the transmitter to transmit a proximity signal to the receiver for indicating the proximity from the home position;
means, responsive to the proximity signal, for estimating the proximity of the radiotelephone and the user on the basis of the received proximity signal; and
means, responsive to the first signal, for causing at least one of the proximity units to enter a standby mode.
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Accused Products
Abstract
A radiotelephone proximity detector including a first proximity unit having a receiver and a second proximity unit having a transmitter, wherein the units can be coupled together and the coupling can be detected. One of the units is associated with a radiotelephone and the other with a user. When the units are coupled, they are responsive to the detection of their uncoupling, whereupon the transmitter of the second proximity unit transmits a proximity signal to the receiver of the first unit. The first proximity unit estimates the proximity of the radiotelephone and the user on the basis of the received proximity signal. Thus the two units operate together such that, when coupled, at least one of the units enters a standby mode, and when uncoupled, at least one of the units sends a proximity signal to the other unit.
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Citations
15 Claims
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1. A radiotelephone proximity detector, comprising:
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a first proximity unit having a receiver and a second proximity unit having a transmitter, one of the units being associated with a radiotelephone and one of the units being associated with a user; means for coupling said units together in a home position; means for detecting when the units are coupled together in the home position and when the units become uncoupled from the home position, and for providing a first signal and a second signal respectively indicative thereof; means, responsive to the second signal, for causing the transmitter to transmit a proximity signal to the receiver for indicating the proximity from the home position; means, responsive to the proximity signal, for estimating the proximity of the radiotelephone and the user on the basis of the received proximity signal; and means, responsive to the first signal, for causing at least one of the proximity units to enter a standby mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification