The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 1980
Filed:
Feb. 09, 1978
Applicant:
Inventor:
Thomas J Lord, Dayton, OH (US);
Assignee:
United Aircraft Products, Inc., Dayton, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05D / ;
U.S. Cl.
CPC ...
236 / ; 116216 ; 116D / ; 137553 ; 165 / ; 236 / ;
Abstract
Thermal actuating or like apparatus in which a sight conduit is comprised in a valve housing enabling the changing position of a thermal actuator within the housing to be observed from outside the housing. A fiber optic device acts as the sight conduit and provides for a display externally of the housing of color coded or like markings on the actuator. In one aspect thereof, the invention makes possible a substantially continuous comparison of the operations of redundant actuators so that an operator or user of the apparatus may be alerted to failure of one of the actuator units.