| 摘要 |
<p>957, 843. Electric correspondence control systems. GRINNELL CORPORATION. May 25, 1961 [Dec. 5,1960], No.18895/61. Addition to 885, 546. Heading G1N. The apparatus of the parent Specification for controlling the tension at the fixed ends of a steam pipe comprising means for measuring the temperature of the pipe, or its expansion, and producing via an electrical system a proportionate force which is applied at appropriate points to oppose the end forces produced by the expansion is modified by making the force applying means non-linear with respect to the electrical signal representing temperature. Thus the piping system is forced into a predetermined calculated configuration which allows for variations in expansion due to irregular heating, differences in material &c.</p> |
