Patent ID: 6079441
Filing Date: 2000-06-27
Classification: F16K,Y10T

Abstract:
An apparatus for providing indication of a valve position for a valve having a rotary operating assembly journaled in a housing, said operating assembly comprising a handwheel, a bushing fastened to said handwheel, and a spindle threadedly engaged to said bushing to cause translation of said spindle in response to rotation of said handwheel and said bushing, said apparatus for enclosure in said housing comprising:a rotatable hub coupled to said bushing for transmitting rotary motion in response to rotation of said bushing;means for translating said rotary motion into an electrical signal voltage Vf; and,circuitry means responsive to said electrical signal voltage Vf for indicating a threshold valve position, said circuitry means comprising: first potential means for generating an open signal reference voltage Vo; second potential means for generating a close signal reference voltage Vc; and, switching means responsive to said electrical signal voltage Vf for transmitting an output signal to a controller representative of the relationship among signal voltages Vf, Vc and Vo.