Title: Valve operator circuit with provision for presetting

Abstract: A valve operator circuit normally operates to compare the pulse rates of two trains of pulses and to step an associated valve open or closed depending on which of the two pulse rates is the higher. The circuit includes a manually-operated presetting arrangement which, when operated, causes the normal pulses to be inhibited from moving the valve, and causes the valve to move to a desired position.

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Inventors: Mayer, Robert (Ardmore, PA, US)

Application Number: 537875
Filing Date: 1975-01-02
Publication_date: 1976-12-14
Assignee: Sun Oil Company of Pennsylvania (Philadelphia, PA)
Primary Class(es): 318/739 318/286, 318/289, 318/601
Other Classes:
US Patent Ref:

3286148	Nov, 1966	Henderson	318/207.
3302085	Jan, 1967	Hulls et al.	318/207.
3593080	Jul, 1971	Reynolds et al.	318/289.

Other Refs:
Primary Examiner: Rubinson, Gene Z.
Assistant Examiner:
Attorney: Hess; J. Edward, Johnson; Donald R., Pack; Gary V.