Patent GB-402987-A (GB)
Title: Improvements in telescopic cocks
IPC: F16K3/26
Filed: 1933-04-06
Abstract: 402,987. Valves. SOULAS, E. G., 54, Rue de Seine, Paris. April 6, 1933. Nos. 10341 and 10342. Convention dates, April 9, 1932 and Dec. 14, 1932. [Class 135.] A telescopic cock comprises a tube 31, Figs 6 and 11, slidable in a fixed tubular mounting 35 attached to the plain or recessed wall of a barrel containing liquid, the cross-section of both tube and mounting being substantially constant throughout their length and the slidable tube having a frictionally-fitted plug 33 controlling a lateral port 32 therein and also carrying a claw 31a which, when the tube is moved by manual or spring means to the extended position, Fig. 11, is guided up the inclined end of the fixed tube 35 into a notch 35c therein, in such a manner that the angular position of the outlet orifice is always the same. The tube 35 is a stamping and carries, integrally or otherwise, a screw-threaded part onto which is screwed in the closed position, Fig. 6, an operating-knob 34 connected rigidly with the plug 33 by a rivet 21. By turning the knob 34 in the extended position one or more ports 33a in the plug can be registered with the tubeport 32 and the ports 33a may have inclined sides or be graduated in size to regulate the flow. To prevent turning of the plug in the tube until the claw 31a on the latter enters the fixed notch 35c, the plug may have a retaining bulge yieldingly fitting into the outlet port in the tube and it is longitudinally slotted to make it grip the tube frictionally. A friction washer may be provided at its end. In the modification shown in Fig. 4, the plug member 15 is longitudinally movable as well as rotatable in the sliding tube 10 and is biased to an inner closed position by a compression spring 23. The tube 10 is moved to the extended position when released by a tension spring 13, whereafter the plug 15 is pulled to the end of the tube to register its port 16 with that, 14, of the tube. In this position, a flat 21a on its stem 21 passes through an aligned elongated hole in the tubehead, so that, by turning the stamped operating- knob 22 through a right-angle, return inward movement of the plug is prevented and it can then be further turned for regulating the delivery. In this form, the fixed tube 1 may be integral with a fixed member 4, or, as shown, is attached thereto by screwing in the latter a part 9 which compresses packing provided between flanges on the tube 1 and member 4. A leather washer 25 carried by the operating- knob 22 seals the end of the member 9. A modification of this form is also shown in which the plug member has rotational movement only in the tube 10. In the form shown in Figs. 6 and 11, the tube 31 slides in a cork sealing member 38 radially tensioned about it and axially compressed in the closed position by pressure of the screw knob 34 acting through a cork washer 41. In other forms, the tube may be of slightly elliptical cross-section to ensure fluid-tightness. The plug-ports 33a have inturned edges forming a spout to check the violence of the liquid jet. The plug 33, Fig. 9, is a solid cork cylinder with an inclined end, and the tube 35 is attached to the barrelwall by means of a stamping 45 screw-threaded between the tube and the end-knob 34. The cock shown in Fig. 6 has a cover comprising a stamping 45 prevented from rotation by a tongue 47 formed on the fixed member 35 and provided with a removable cap 44. The part 45 has T-slots around its inner periphery to facilitate tearing it away. The form shown in Fig. 9 uses a springy disc cover 44 slotted around its outer periphery so as to permit it being forced by pressure under the edges of the member 45. Wire lead-seals 48, Fig. 6, are provided between fixed parts and lugs on the operating-knobs.