Patent GB-513692-A (GB)
Title: Improvements in and relating to fluid controlling valves
IPC: F16K3/28
Filed: 1938-04-12
Abstract: 513,692. Valves. SAUNDERS, P. K. April 12, 1938, Nos. 11172, 12595 and 33784. Addition to 502,795. [Class 135] This invention comprises a number of detail improvements in the valve construction claimed in the parent Specification. In the form shown in Fig. 1 the flanged member 8 to which the elastic plug 7 is secured houses packing rings 11 compressed by a nut 12 screwed on to the member 8 into contact with a washer 21. When the valve is fully open the washer 21 contacts with a shoulder 18 on the bonnet 15 to relieve the load on the nut and permit its easy adjustment through apertures 31. To prevent vibration moving the nut a rubber washer 14 is inserted between the members 8 and 12. According to the first Provisional Specification the nut may have a boss projecting through an aperture in the washer into contact with the packing to prevent accidental movement. An actuating handle 25 is secured to a nut rotatably mounted in the bonnet 15 and adapted to co-operate with a screwed spindle pivotally attached to the member 8 and held against rotation by flats on the spindle engaging similar flats on an aperture in a bridge 27 having arms secured in slots 29 in the bonnet. The bonnet is split longitudinally and is clamped to the upper end of the valve casing by a transverse bolt 17 which also engages a groove in the casing. According to the first Provisional Specification the bonnet may be secured by a bayonet joint providing several positions of the one relative to the other. The barrel part of the casing in which the plug reciprocates may be separately formed of glass or other material and clamped by bolts between the casing proper and a bonnet part. In the form shown in Fig. 5, the valve plug is elliptical in cross section and is arranged with its major axis at right angles to the direction of flow. The plug comprises an envelope of relatively hard rubber 39 arranged about a series of metal plates separated by soft rubber washers threaded on to a central tube 40 secured to a member 42. A flange on the envelope is clamped against the member 42 by an elliptical plate 47, secured by screws to the member 42. The members 42, 47 are recessed to provide a square chamber adapted to house a nut 52 engaging the screwed actuating spindle which works within the tube 40, the latter being closed at the end to form a lubricant reservoir. A collar on the spindle is rotatably held against the underside of a bonnet by a bridge 57. In the form shown in Fig. 8 particularly adapted for use with compressed air the overall height of the valve casing is reduced by extending the barrel part 60 into the fluid conduit. The valve plug is fitted with a double cup-leather packing washer 65 secured in place by a nut 66 adapted to contact, when the valve is open with a fibre washer 70 clamped against the end of the casing by the screwed bonnet engaging a dished plate 68. The actuating spindle passes through a central aperture in the plate 68 formed with flats to mate with flats on the spindle and so hold it against rotation. The actuating handle is secured to a nut 79 rotatably mounted in the bonnet and engaging the thread on the spindle, a felt washer being inserted between the nut and bonnet. Specification 505,974 is referred to.