Rapidly starting low power scan mechanism

Details Rapidly starting low power scan mechanism Rapidly starting low power scan mechanism

1986-02-27

1987-12-15

Corbin, John K.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

350 67, 318341, G02B 2610

Patent

active

047128534

ABSTRACT:
A beam scanner system particularly for use with laser scanners employs the back EMF signal from a scanner driving motor for a tachometer signal indicating motor speed. The tachometer signal goes into a phase lock loop for causing the motor at startup to quickly obtain operating speed, and for controlling speed while the motor is in operation. Using the phase lock loop, a clock signal is compared to the tachometer signal from the motor, and power to the motor is increased or decreased whenever and so long as the tachometer signal is not equal to the desired speed. The system therefore provides a very quickly starting scanner, as for use in hand held bar code scanners, without requiring the scanner to be kept energized on standby power when the laser is not active.

REFERENCES:
patent: 4140903 (1979-02-01), Clark
patent: 4145642 (1979-03-01), Kosada et al.
patent: 4307324 (1981-12-01), Regrier
patent: 4498034 (1985-02-01), Shirakawa
patent: 4578625 (1986-03-01), Nazarian et al.
patent: 4605884 (1986-08-01), Miyagi

Affiliated with

Also associated with

Rating

Rapidly starting low power scan mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rapidly starting low power scan mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapidly starting low power scan mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1215894