| 摘要 |
<p>1485281 Pressure gauges ITT INDUSTRIES Inc 1 Oct 1974 [1 Oct 1973] 42563/74 Heading G1L The differential pressure unit described in Specification 1485282 is modified by the addition of range spring selection and zero adjustment means. The zero adjustment, Figs. 19, 20, is provided by a coil spring 172 mounted in the block 108' with one end fixed to the flange 143' on the diaphragm post and the other fixed to a shaft 175. The shaft 175 is rotated by a worm and wormwheel 178, 186 Fig. 21, by an exposed slotted head 183 and the worm is locked in position by a screw 185 when the desired spring tension is achieved. One or a series of differing range springs 140' is fitted, the lower ends 141', Fig. 19, being normally free in the block 108' but being capable of being fixed to it selectively. This is done by a clamp 220 for each spring, Fig. 29, advanced by screw means 193, 211, 218, to force an enlargement 170 on the spring end against the side of the bore 171 in the block.</p> |
