Patent GB-416746-A (GB)
Title: Improvements in or relating to spraying devices
IPC: A62C11/00
Filed: 1933-08-28
Abstract: 416,746. Fire-extinguishers. JACKSON, L. MELLERSH-, 28, Southampton Buildings, Chancery Lane, London.-(Wil-X-Mfg. Corporation ; 29, Ryerson Street, Brooklyn, New York, U.S.A.) Aug. 28, 1933, No. 23880. [Class 102 (ii).] Ina fire-extinguisher or similar apparatus which is discharged by air pressure an air pump is pivoted on the head of the container, the air or liquid passage, or both, passing through the pivot. The container 11, Figs. 2, 4 and 5, may be of semicircular form with a recess 12 in which the pump 24 lies when not in use. A block 52 secured to the pump barrel carries a threaded pin 521 which extends through a block 16 on the cover 13 of the container. The pin is formed with conical portions 79, 53 surrounded by packing gaskets 80, 64, the latter being compressed by a conical sleeve 66, which is pressed axially by the securing nuts 54. Tubes 57, 76 extend parallel to the pump barrel from the lower pump cover to the block 52. The air discharged by the pump passes through the tube 57 and a passage 56 in the block 52 to the passage 55 through the pin 521 and discharges into the interior of a cap 58 screwed into the bracket 16 and through a passage 20 to the container. The passage 55 is controlled by a check valve 60. A pump discharge pipe is closed by the pump piston when the pump is not in use. The liquid is discharged through a tube 21 extending from the bottom of the container to a chamber 23 in the bracket 16 and through a space 19 in the bracket, a passage 77 in the block 52 and the tube 76 to a nozzle at the end of the pump barrel. The top of the tube 21 is controlled by a valve 67, operated by a finger 70 on a recessed disc 71, which is loose on the pin 521 and is operated by a pin 84 carried by the pin 52<1>, so that the valve is opened when the pump is moved to the position at right-angles to the container for discharge. In a modification, Fig. 14, the pump is carried at one end of an arm 107, the other end carrying pins 145, 146 which are pivoted in brackets 105, 106. The liquid discharges through a tube 132 and a check valve 134 to the interior of the bracket 106, which is closed by a cap 119, the liquid passing through the pin 146 and a passage 109 in the arm 107 to a nozzle at the end of the pump barrel. The air discharges from the pump through a passage 108 in the arm 107, a passage in the pin 145 controlled by a check valve 149 and past a check valve 135 into the container. The valves 134, 135 are held closed by springs 138 and are opened when the pump is moved to the operative position by cams 153, 154. The cams are formed on sleeves keyed to the pins 145, 146 and pressed axially against packing 158 by nuts 155, 156. In a further modification, Fig. 17, the pump barrel 16<a> is secured to a block 35a carrying trunnions 36<a> supported in brackets 15<a>. An air passage 40<a> passes through one trunnion and a liquid passage through the other trunnion. The passages are connected by unions to pipes 45a, the air pipe leading to a check valve discharging into the container and the liquid pipe 45<a> leading to a casing 44a into which the liquid ascension pipe 43a opens. The end of the pipe 43a is controlled by a valve 62<a>, which is held closed when the pump is in the inoperative position by means of a cam 75<a> on the block carrying the pump acting on the stem of the valve through a spring 72<a>. The pump is held in the operative position by means of a wire 76<a>, which engages in a recess 77<a> in the block 35<a> carrying the pump. In the modification shown in Fig. 26 the block 57b carrying the pump pivots on a pin 20b carried on the head of the container. The air and liquid passages 27b, 23b formed in the pin communicate, in the operative position of the pump, with passages 65b, 60b in the block 57<b>.