Horology: time measuring systems or devices – Chronological – With mechanical or electromechanical driven display
Patent
1990-10-30
1993-12-14
Roskoski, Bernard
Horology: time measuring systems or devices
Chronological
With mechanical or electromechanical driven display
368187, 368184, G04B 1904
Patent
active
052709930
ABSTRACT:
The device for performing the method for detecting the zero position of a hand of a quartz watch with analogue display enables a beam of light to be generated and directed onto a reflective surface integral with a moving part bearing the hand, the reflected beam to be received on a detector and the position for which the output signal of the detector is maximal to be determined to make it correspond to the zero position of the hand when assembling the watch. This device comprises a source (1) emitting a beam of light (2) and a receiver (3) which intercepts the reflected beam (4) returned by a very reflective area (5). This area is integral with a surface of a moving part (6), for example the wheel bearing the second hand and, depending on the position of this wheel, the reflective surface may occupy a position (5) or an adjacent position (5') staggered by less than one step. The signals from the detector (3) are transmitted to an electronic ciruict (7) connected to an electric motor ( 8) which drives the moving body (6) by means of a train of wheels (9).
REFERENCES:
patent: 4420263 (1983-12-01), Besson et al.
patent: 4645357 (1987-02-01), Algaier et al.
Besson Rene
Leuenberger Claude-Eric
Montres Rolex S.A.
Roskoski Bernard
LandOfFree
Method for detecting the zero position of a hand of a quartz wat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for detecting the zero position of a hand of a quartz wat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting the zero position of a hand of a quartz wat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1711888