Patent GB-334170-A (GB)
IPC: B67D7/16
Filed: 1929-03-25
Abstract: 334,170. Bowser & Co., Inc., S. F. Dec. 17, 1928, [Convention date]. Fixed-chamber apparatus.- Liquid-dispensing apparatus, in which the quantity delivered is determined by the level of an adjustable overflow pipe in the measuring chamber, is provided with interlocking mechanism whereby the quantity-determining gear may not be reset while the supply or discharge valve is open. Figs. 3, 5, 6, 7 when superposed illustrate the complete apparatus. From the pump 87 liquid passes through a centrifugal filter 108, screens 121, 127 and the pipes 142, 147 to the top of the measuring chamber 80; it accumulates to the level of the wide funnel 272 surmounting the adjustable pipe 271 by which the excess is returned to the reservoir. Delivery takes place through the valve 186 having a visible float 166 adjacent thereto.. The supply and discharge valves are operated by tappets 140, 181 carried by a countershaft 175 in gear with a shaft 172 having at each end a handle 170 movable over a disc provided with " fill," " neutral," and " discharge" indications. The quantity-stop lever 293 is mounted on the pipe 271 and projects through a slotted plate in the outer casing. While the pipe 271 may be moved only in the direction of its length, angular movement is permitted to the lever 293. Its protruding end may therefore be engaged in lateral recesses in the casing plate, and a rearwardly extending arm 297 enters one of a series of quantity-slots 299 in plates clamped and sealed to a fixed vertical bar. The lever 293 also passes through a vertical slot 306 in a plate 305; from the upper end of this plate a quadrant 345 extends and, when the supply and discharge valves are closed, may be swung by the lever 293 into a slot 346 in a fixed bracket 347. Engagement with the slot 346 is however prevented when the valves are open by the movement of a crank 348 on the shaft 172. Plates 351, 353 are depressed by the crank pin 349 thus placing recesses 356, 357 out of register with the slot 346; movement of the quadrant 345 is thus obstructed, preventing any alteration of the quantity-setting mechanism during the operations of charging and discharging the container 80. Since the slot 350 is narrower than the slot 352, the plate 353 does not return with the plate 351, and a spring- pressed pin passes through the slot 364 in plate 351 into a receess in the plate 353. The filling valve may thus be closed but the quantity-setting mechanism is still held until the further. movement of the shaft -72 opens the discharge valve. The wide overflow funnel 272 at the top of the pipe 271 leaves but a small space between its edge and the wall of the container; by this arrangement the volume to be dispensed is more accurately determined. Still greater accuracy is obtained by the provision of a supplementary funnel 291 having its rim 292 below the level of the main funnel. A non-return valve in the lid of the container permits the escape of air during the filling operation. Splashing is avoided by the use of the concentric tubes 142, 147. The funnel 272 is recessed for the passage of the pipes 147, 278 and also to leave space for a pair of quantity-indicators 83 illuminated by lamps placed in sockets outside the base of the container 80. Each number is carried on a plate 255 roughly adjusted on its supporting rod by a clamp 258 and given a fine adjustment by a screw 265. Above the number is an inverted V groove 254, the point being set to come at the surface of the liquid; by reflection a perfect X should be visible to the dispenser. The number-plate supporting rods are set back from the surface of the cylinder 80 to improve the reflection effect. Counting and registering mechanism is set by the quantity-stop lever 293, and registration is completed through the medium of the valve shaft 172 during the first half of its movement from neutral to valve-opening position. The non- rotating hub 295 accompanies the lever 293 in its upward movement and by means of the arm 367 actuates the vertical rack-bar 369, Fig. 53, which extends into the closed tube 373, transmits intermittent movement to the toothed segment 375 keyed to a segment stop plate 379. The gear-wheel 373, Fig. 71, has eight teeth, alternate teeth being cut away at one end. The flat portions 374 together with the adjacent full teeth rest against the bar 369 during its movement until the teeth are engaged by the offset teeth of the rack, when rotation through an angle represented by two teeth takes place. A two-armed lever 388 is linked resiliently to a crank 386 on the valve shaft 172 by means of a compression-spring 391 surrounding the guide rod 384 and pressing on a sleeve 392 pivoted to the lever 388. The other arm of the lever 388 is furnished with an adjustable stop 389 for engaging one of the stops 390 on the plate 379 which is set by the rack-bar 369. When the crank 386 is moved from the full-line position of Fig. 53 to the broken-line position 382, the spring 384 rocks the lever 388 away from the stop 390 until it is brought up against the fixed stop 394. The angular movement of the lever 388, dependent on the position of the stop-plate 379, is transmitted to counting mechanism by a toothed segment 399 secured to the shaft 387. A pinion 400 passes on the movement of the segment 399 by means of an arm 409, to a pawl 415, ratchet 416 and counter of usual construction. A blind 426 may be placed before the counter and may be locked in position to prevent unauthorized observation of its readings. Actuation of the lever 293 may be prevented by a padlock passed through a pair of lugs; one of these lugs being a projection from the slotted plate 305 and brought into register in the lowest position of the tube 271 with a lug on the casing. Wire screens with gaps for observing the indicators 83 surround the container 80. A lamp is displayed in the globe surmounting the apparatus ; the leads pass through a radial channel 241 into and down through a vertical pipe 244 at the side of the container. For inspecting the container the canopy may be swung aside on the members 241, 244. Vertical mounting is facilitated by the provision of a plumb-bob 434 at the side of the container 80. A padlocked cover 113 is fitted over the drain-valve from the chamber 109.