Title: Analog automatic slowdown system

Abstract: An analog automatic slowdown control system is described for determining the optimum instant of time to initiate slowdown, for a process line in which a coil of material is being unwound from a mandrel at a linear speed. Using the intelligence derived from the linear speed and the speed of the unwind reel, signals are derived for: the instantaneous diameter, the desired remaining portion of the diameter after stopping, and the change in diameter during deceleration. These three signals are algebraically summed with a signal which is a function of the mandrel diameter, and when the summation is zero, slowdown is initiated.

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Inventors: Herbert, Roger B. (Williamsville, NY, US)
Horowitz, Harvey A. (Williamsville, NY, US)
Barrett, Donald F. (Buffalo, NY, US)

Application Number: 562616
Filing Date: 1975-03-27
Publication_date: 1976-09-07
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 242/563.2 72/11.1, 72/12.6
Other Classes:
US Patent Ref:

3518857	Jul, 1970	Hancock et al.	72/8.
3553992	Jan, 1971	Harbaugh	72/9.
3663806	May, 1972	Drankhan et al.	242/75.

Other Refs:
Primary Examiner: Christian, Leonard D.
Assistant Examiner:
Attorney: Wood; James J.