Title:
気圧計または高度計の読みを備える腕時計、およびその腕時計を製造する方法
Document Type and Number:
Japanese Patent JP4594531
Kind Code:
B2
Abstract:
The wristwatch includes in its case a resistive piezo-electric pressure and temperature sensor (26) exposed to a pressure chamber (42) communicating with the outside environment, for measuring ambient pressure. In order to provide individual calibration as a function of temperature followed by a permanent correction of the sensor pressure signals, the latter is fixed to the lower surface of a printed circuit board (30) bearing the electronic circuits (35) processing the sensor signals. The calibration parameters are stored in a non-volatile memory (36) of said circuits. A rigid and sealed separating wall (43) forms an internal bottom separating the pressure chamber (42) from the watch sealed part.
Inventors:
Birkin, Michael
Jemike, Christopher
Bourne, Jean-Jack
Jemike, Christopher
Bourne, Jean-Jack
Application Number:
JP2000591480A
Publication Date:
December 08, 2010
Filing Date:
December 22, 1999
Export Citation:
Assignee:
ASULAB SOCIETA ANONYME
International Classes:
G04G99/00; G04C3/00; G04G17/08; G04G21/02; B63C11/02
Domestic Patent References:
| JP7325167A | ||||
| JP60109089U |
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Hiroro Kurokawa
Osamu Nishiyama
Shigeki Yamakawa
Hiroro Kurokawa
Osamu Nishiyama