Photocopying – Including fiber optics
Patent
1980-10-02
1983-02-01
Moses, R. L.
Photocopying
Including fiber optics
355 14R, G03G 1528
Patent
active
043712541
ABSTRACT:
The present invention is a programmed brake for controlling the deceleration of a scanning carriage. An encoder including an electro-optic sensor mounted on a moving carriage together with a stationary grating having a plurality of unevenly spaced apertures, provides velocity data of the rate of the relative movement of the sensor and grating during flyback or scan return. In particular, the sensor detects a plurality of light pulses through each of the apertures as the sensor moves relative to the grating. The light signals are conveyed to a counter and the count is compared to a reference number representing a deceleration profile or standard number of signals desired for each aperture. If the number of light signals is less than the standard, occurring if the carriage is overspeed, a transistor driver is pulsed to activate an electromagnetic brake connected to the scanning carriage. When the scanning carriage velocity has slowed sufficiently, the brake is inactivated.
REFERENCES:
patent: 3424526 (1969-01-01), Sacre
patent: 3554640 (1971-01-01), Hoskins
patent: 3907422 (1975-09-01), Eppe et al.
patent: 3950091 (1976-04-01), Brooke
patent: 3990792 (1976-11-01), Kono et al.
patent: 4150873 (1979-04-01), Dali
patent: 4280763 (1981-07-01), Arai et al.
U.S. Ser. No. 80,624 filed 10/1/79 by Warren Hall, Jr., entitled "Open Loop Controller."
Chapuran Ronald F.
Moses R. L.
Xerox Corporation
LandOfFree
Programmed brake for controlling the speed of a scanning carriag does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Programmed brake for controlling the speed of a scanning carriag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmed brake for controlling the speed of a scanning carriag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2406122