Wristwatch with high-frequency transmitter
First Claim
1. Wristwatch comprising, in addition to a device for measuring and displaying the time, a high-frequency transmitter, a current source for the supply to this transmitter, a switch for turning on the transmitter, an extensible antenna in the form of a wire wound up in a housing of the watch before use, one of whose ends is fastened to the watch, the other end being secured to a plug removably fastened to the watch before use of the transmitter, the antenna being unfurled by pulling on the plug, this unfurling moreover having the effect of closing the switch and turning on the transmitter and a counterpoise antenna of the same type as the main antenna and also wound up, before use, in a housing of the watch and one end of which being also secured to a plug removably fastened to the watch before use, said counterpoise antenna being arranged in such a way as to be able to be unfurled in a direction opposite to that of the main antenna.
1 Assignment
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Accused Products
Abstract
Wristwatch equipped with a high-frequency transmitter comprising an extensible antenna in the form of a wire wound up in a first housing and a second antenna forming a counterpoise and wound up, before use, in a second housing. These two antennae are each fastened to a plug by means of which the antennae can be unfurled by pulling, the plugs becoming detached when the antennae are completely unfurled.
The transmitter essentially constitutes a distress beacon and the presence of a counterpoise antenna has the effect of significantly amplifying the radiating power of the transmitter without consuming additional energy.
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Citations
8 Claims
- 1. Wristwatch comprising, in addition to a device for measuring and displaying the time, a high-frequency transmitter, a current source for the supply to this transmitter, a switch for turning on the transmitter, an extensible antenna in the form of a wire wound up in a housing of the watch before use, one of whose ends is fastened to the watch, the other end being secured to a plug removably fastened to the watch before use of the transmitter, the antenna being unfurled by pulling on the plug, this unfurling moreover having the effect of closing the switch and turning on the transmitter and a counterpoise antenna of the same type as the main antenna and also wound up, before use, in a housing of the watch and one end of which being also secured to a plug removably fastened to the watch before use, said counterpoise antenna being arranged in such a way as to be able to be unfurled in a direction opposite to that of the main antenna.
Specification