| 摘要 |
1,165,529. Pressure gauges. FOXBORO CO. Aug.22, 1968 [Sept.8, 1967], No.40228/68. Heading G1L. In a differential pressure-responsive apparatus in which a force-rod 18 is pivotally supported by a diaphragm 25 so that one end 42 of the rod 18, is located in a casing 12 and is pivoted by a diaphragm 14, subject to different internal and external pressures, through a linkage 16 and the other end 44 of the rod 18 is located externally of the casing 12 and is held in position by struts 48, 50. The struts are provided with grooves 74, 76 arranged above and below the ends of yoke arms 58, 60 and with grooves 72 below a cross-bar 56 and the arrangement is such that should any misalignment occur between the longitudinal axis 80 of the force-bar 18 and the longitudinal axis 78 of the struts 48, 50 the yoke arms 58, 60 can be adjusted by a screw 66 against a spring 70 to bring the axes 78, 80 into alignment. The back pressure occuring in the air directed through a nozzle 34 on to a plate 30 delivers a signal to a bellons to oppose the force of the diaphragm 14 and also serves as an output signal to initiate the magnitude of the pressure. |
