| 摘要 |
<p>1,085,236. Liquid level indicators. WILLIAM & JAMES (ENGINEERS) Ltd. Sept. 30, 1964 [Oct. 5, 1963], No.39305/63. Heading G1H. [Also in Division F2] A valve comprises a main valve member and filter element assembly 12, 14 which is withdrawable from a valve body 1, and so arranged that when the valve is open flow through the valve passes through the element, and an isolating valve member 23 which automatically closes to prevent leakage from the valve when the assembly is withdrawn. The member 12 is moulded from synthetic plastics material and has a closure face 16 which is operatively associated with a face 17 of the body 1, to control the flow of liquid from an inlet 2 to an outlet 7, upon axial movement of the member 12 produced by rotation of the assembly 12, 14. The filter 14 is directly connected to a further closure 13 which controls the flow from the inlet 2 to an outlet 8 connecting with a level indicator 40. The member 13 can be moved axially off its seat against the action of a spring 29 by a knob 31. The spring 29 also urges the member 22 to the closed positions so that when the assembly 12, 14 is removed for cleaning, the member 22 closes on to its seat. A U-shaped stirrup 30 prevents the assemblies 12, 14 from being inadvertently removed from the body 1, but axial movement of the member 13 causes cam surfaces 33, 34 to retract the stirrup 30 and allow the assembly to be withdrawn. The level indicator 40 may be a Bourdon gauge which may be connected directly to the upstream passage of the main valve 12.</p> |
