Title: Tape transport system including a logical network for producing quadrature pulse trains and motor control utilizing same

Abstract: A constant speed reel-to-reel tape transport system is described including a drive motor having a pair of quadrature windings, and a motor supply producing a pair of square-wave motor-drive pulse trains of the same repetition rate, but 90.degree. out of phase, one train being supplied to each of the quadrature windings. The system further includes control means responsive to the change in the effective radius of one of the reels, for example the drive reel, for varying the repetition rate of the pulse trains, and thereby the speed of the motor, to maintain a constant linear tape speed.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Sargunar, John E. (Glenrothes, SC, US)

Application Number: 456239
Filing Date: 1974-03-29
Publication_date: 1976-02-17
Assignee: Burroughs Corporation (Detroit, MI)
Primary Class(es): 242/334.3 242/414.1, 318/6
Other Classes:
US Patent Ref:

3297266	Jan, 1967	Rumple	242/186.
3373332	Mar, 1968	Olsen	242/75.
3764087	Oct, 1973	Paananen et al.	242/191.

Other Refs:
Primary Examiner: Christian, Leonard D.
Assistant Examiner:
Attorney: Barish; Benjamin J., Uren; Edwin W., Peterson; Kevin R.