Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Signal generating pressure gauge
 A signal generating pressure gauge includes a pressure indicating unit having a housing provided with an inlet, a pressure-value indicating panel, a pressure converting unit fluidly communicated with the inlet and provided with a rotary shaft which rotates in response to pressure entering into the inlet, a pointer which rotates with the rotary shaft in order to indicate on the indicating panel the pressure imposed on the inlet, and an electrically conductive pressure control needle movable together with the pointer. An adjustable pressure-setting mechanism includes a rotary plate rotatably mounted in the housing and rotatable relative to the indicating panel, and electrically conductive low-pressure and high-pressure stop units which extend into a setting hole unit in the rotary plate. The positions of the low-pressure and high-pressure stop units in the setting hole unit are adjustable and correspond to the lower and upper limits of a desired pressure range. The stop units limit movement of the pressure control needle therebetween. A signal transmitting unit includes an input voltage cable electrically coupled to the pressure control needle, and low-pressure and high-pressure output signal cables coupled electrically and respectively to the low-pressure and high-pressure stop units. 
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G01L G01L
inventional inventional
Tien-Tsai
Huang