Watch comprising an arrangement for indicating a predetermined geographic locality

Patent 5721713 Issued on February 24, 1998. Estimated Expiration Date:

December 21, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Device for indicating direction to a predetermined locale
Patent #: 4372052
Issued on: 02/08/1983
Inventor: Wakim

Portable information device having an output related to natural physical events
Patent #: 4512667
Issued on: 04/23/1985
Inventor: Doulton , et al.

Electronic compass Patent #: 5175936
Issued on: 01/05/1993
Inventor: Sato

Inventor

Bornand, Etienne

Assignee

Asulab S.A.

Application

No. 576409 filed on 12/21/1995

US Classes:

368/10COMBINED WITH DISPARATE DEVICE

Examiners

Primary: Roskoski, Bernard

Attorney, Agent or Firm

Sughrue, Mion, Zinn, Macpeak & Seas, PLLC

Foreign Patent References

154096 EP. 09/13/1985
165381 EP. 12/13/1985
2681159 FR. 03/13/1993
678359 CH. 08/13/1991
2151790 GB. 07/13/1985

International Class

G04B 047/00

Foreign Application Priority Data

1995-01-04 CH

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.