Wristwatch with high-frequency transmitter

Details Wristwatch with high-frequency transmitter Wristwatch with high-frequency transmitter

1995-11-14

1996-09-24

Roskoski, Bernard

Horology: time measuring systems or devices

Combined with disparate device

368278, G04B 4700

Patent

active

055597602

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.

REFERENCES:
patent: 5235563 (1993-08-01), Ganter et al.
patent: 5253226 (1993-10-01), Ganter
Japanese Patent Abstract (No. 52--152759, dated Dec. 19, 1977).

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