| 摘要 |
1,108,251. Valves. SERVOTOMIC Ltd. 5 Jan., 1966 [13 Jan., 1965], No. 1471/65. Heading F2V. [Also in Division F4] In a gas burning system (see Division F4) a temperature controlled valve comprises gas inlet 30 and outlet 31 and a valve member 32 biased by a spring 35 which urges it into a position to cut off the gas. A rod 36 secured to the member 32 rests via a rod 39 on an " Invar " (Registered Trade Mark) rod 40 received in a brass tube 41 surrounded by a container 29. As the valve becomes heated; e.g. by water of a central heating system passing through container 29, the brass tube expands more than rod 40 causing member 32 to cut off the gas. A second valve is described which forms the subject of Specification 1,108,251. |
