Watch comprising an arrangement for indicating a predetermined g

Details Watch comprising an arrangement for indicating a predetermined g Watch comprising an arrangement for indicating a predetermined g

1995-12-21

1998-02-24

Roskoski, Bernard

Horology: time measuring systems or devices

Combined with disparate device

G04B 4700

Patent

active

057217130

ABSTRACT:
A watch for indicating the direction of a predetermined locality from a plurality of defined geographic regions. Such watch comprises an arrangement (28, 40) for detecting the direction of terrestrial magnetic north and means (22, 46, 14) for indicating the direction of a predetermined locality from any geographic region whatsoever comprised within a plurality of defined geographic regions. Moreover the watch comprises means (18, 19, 20) operable by a user of the watch in order to furnish a code number to an electronic managing and control unit (22). This number, chosen among a plurality of numbers, forms a code corresponding to the geographic region in which the user is located. With the help of such code number, the electronic unit (22) can determine the mean magnetic azimuth corresponding to the region in which the user is located by means of a memory (26) in which is stored a plurality of mean magnetic azimuths respectively corresponding to said plurality of geographic regions.

REFERENCES:
patent: 4372052 (1983-02-01), Wakim
patent: 4512667 (1985-04-01), Doulton et al.
patent: 5175936 (1993-01-01), Sato
Patent Abstracts of Japan, vol. 5, No. 175 (P-88) (847) Nov. 11, 1981 & JP-A-56 103 389 (Kabushiki Kaisha Daini Seikosha), Aug. 18, 1981.

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