G - Physics – 01 – L
Patent
G - Physics
01
L
340/133, 340/157
G01L 1/00 (2006.01) G01L 9/00 (2006.01) G01L 11/00 (2006.01) H01H 35/24 (2006.01)
Patent
CA 1187152
Abstract A pressure responsive switching device, particularly a pressostat or thermostat, comprises an actuating element (5) which is loaded in one direction by an operating element (1) at the pressure and in the other direction by a main spring (9) by way of a force transmission device (10). The latter has a physical quantity (Pk) which is variable with the force transmitted by the operating element. In addition, there is a measured value generator (23) which, depending on this physical quantity, delivers an electric analogue signal (S). The force transmission device may comprise a compensating force producer (10) in the form of an expansion element (15) which is provided with a liquid-vapour filling and a heating device (21), by which the compensating force of the force of the operating element (1) is made to follow. In this way, the switching device can deliver an analogue signal (3) corresponding to the system pressure (P) by using the same operating element (1). Fig. 1.
394489
Danfoss A/s
Macrae & Co.
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