Elapsed time indicator

Horology: time measuring systems or devices – Chronological – With mechanical or electromechanical driven display

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

368155, 310 49R, G04B 1920, G04C 1500, H02H 3717

Patent

active

042778417

ABSTRACT:
A stepping motor (44) for use in and in combination with an elapsed time indicator (10) of the type including a plurality of indicator drums (102, 104, 106 and 108) and a drive train (FIG. 3) driven by the motor for driving the indicator drum (102). The motor includes a rotor (56) and a stator providing a pair of stator poles (50, 52) including a notch (94, 96) in respective poles faces. The notch creates a pair of pole faces, one of major length and the other of minor length in each stator pole. In a non-current condition, the rotor seeks a dwell or detent position rotationally toward the pole face of greater concentration of iron. When the winding (54) is pulsed, the rotor, within at least the second pulse, moves unidirectionally and between pulses locates a further dwell or detent position. An indicator (154) including a flag (156) is controlled in movement by the motor so that the flag is moved into and out of a viewing window (40) to indicate motor operation.

REFERENCES:
patent: 2353670 (1944-07-01), Johnson
patent: 3132558 (1964-05-01), Wymann
patent: 3370189 (1968-02-01), Haydon et al.
patent: 3495107 (1970-02-01), Haydon
patent: 3754391 (1973-08-01), Fujita
patent: 3878414 (1975-04-01), Harakawa
patent: 3908353 (1975-09-01), Graziano
patent: 3978651 (1976-09-01), Yoshino
patent: 4004168 (1977-01-01), Haydon
patent: 4047375 (1977-09-01), Wulff
patent: 4088909 (1978-05-01), Matsumura et al.
patent: 4162418 (1979-07-01), Kawaki et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Elapsed time indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Elapsed time indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elapsed time indicator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-197160

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.