Title: Control device for a valve actuator

Abstract: In a control device such as a valve actuator, the improvement comprises means for indicating the number of revolutions undergone by the valve actuator. The rotatable valve actuator drives a plurality of spaced-apart shafts which are geared to each other in suitable driving ratios with each shaft carrying an indicator to indicate the angular position of that shaft. The combination of indicators provides an indication of the number of revolutions by the valve actuator. Means can also be provided to operate one or more sets of electrical contacts when a predetermined digital indication is reached.

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Inventors: Filippini, Umberto (Lastra a Signa (Florence), IT)
Bianchini, Pierluigi (Florence, IT)

Application Number: 668805
Filing Date: 1976-03-19
Publication_date: 1979-01-23
Assignee: Nuovo Pignone S.p.A. (IT)
Primary Class(es): 235/132R 200/18
Other Classes:
US Patent Ref:

2581859	Jan, 1952	Hoye	235/132.
2764350	Sep, 1956	Braatz	235/132.
3182908	May, 1965	Wahli et al.	235/132.
3205651	Sep, 1965	Stiffler	200/38.
3974962	Aug, 1976	Sulzer	235/132.

Other Refs:
Primary Examiner: Franklin, Lawrence R.
Assistant Examiner:
Attorney: Morgan, Finnegan, Pine, Foley & Lee