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:
Apr. 15, 1986
Filed:
Jul. 06, 1984
John W Robertson, Jr, Chesterland, OH (US);
Jane E Smith, Mentor, OH (US);
The Babcock & Wilcox Company, New Orleans, LA (US);
Abstract
A resistive network is used for an electro-pneumatic converter so that the speed of the electro-pneumatic converter can be regulated. The converter includes a reversible DC servo motor having a pair of terminals connected to a pair of lines. The lines are selectively connectable to a common terminal of a power supply. The power terminal of the power supply is connected over a variable resistor to a terminal connecting the lines. Selectively connecting one of the lines to the common terminal causes electrical power to pass through the motor and one for an opposite direction to turn the motor shaft in a selected direction of rotation. The speed of rotation is determined by the position of the variable resistor. The motor shaft is used in conjunction with a cam that is associated with a nozzle supplied with pressurized gas over a bellows. The nozzle is moved closer or further away from the cam edge as the bellows expands or contracts. A line connected upstream of the bellows provides gas at a selected pressure which is porportional to the position of the cam. The position of the cam is determined by the rotation of the motor shaft.