Patent GB-341017-A (GB)
Title: Improvements in or relating to apparatus for delivering measured quantities of liquid
IPC: G07F17/26
Filed: 1929-09-05
Abstract: 341,017. Recording-mechanism. WRAY, D. L., Hillswick, Victoria Road, Shoreham-by-Sea, and CHRISTMAS, H. G., Warwick House, Cranleigh, Surrey. Sept. 5, 1929, No. 27021. [Classes 106 (i) and 106 (iv).] Recording-mechanism is set by liquid-delivery apparatus, actuation being completed and the mechanism returned to zero position by a single member. As shown in Figs. 3, 4, 5 a cam rotated by the pump crank closes a mercury switch once for each half gallon delivered. A solenoid 88 is thus energized ; a pin 84 on the armature 86 draws forward the arm 80 of a bell-crank lever and engages a pawl 76 with a ratchet wheel 72 inside the type-wheel 10. When the solenoid is de-energized, a spring 82 causes the pawl 76 to advance the wheel 10 by one-tooth space. A pin 108 then ceases to obstruct a three-armed lever 110 which rocks under the influence of a spring blade 112 and lifts the depending arm of the lever from engagement with a notch in a lever 18. The type-wheel is mounted in a pivoted frame 12 and may now be raised by depressing the lever 18 thus making contact with a paper strip 22 and ink-ribbon 28. A second pivoted frame 30 is formed with a bar 34 which bears on the frame 12 and carries on an extension 38 a spring-restrained pivoted hook 40. When the lever 18 is actuated, the hook 40 swings clear of a pin 42 and engages a pin 44 on which is a catch 46 engaging a notch in the edge of the cash drawer 36. As the hook 40 falls with the return of the lever 18, the catch 46 is withdrawn, and the drawer opens automatically due to the engagement with a part thereon of a spring-impelled bar 54. A pawl 58 on the bar 54 at the same time rotates a ratchet wheel 62 on the spindle of the paper reel which is thus advanced. A cam 66 rotated by an external knob serves for lifting the pawls 68, 58 to allow a completed reel to be withdrawn. The lifting of the wheel 10 permits the spring 82, after advancing the wheel by means of the pawl 76, to lift the latter from engagement with the ratchet teeth leaving it supported by the upper end of the projection 106 carried by the armature 86. A tail-piece 59 lifts the retaining pawl 74 and allows the wheel 10 to swing back to zero under the influence of a coil spring 70. The zero position is determined by the engagement of the pin 108 with lever 110, which also relocks the lever 18. The blade-spring 112 also 'acts as a switch contact for a lamp 116 illuminated during the recording operation only. Any number of type-wheels may be included in one casing, each wheel carrying corresponding type for indicating the amount and price of liquid delivered, together with the pump number. Duplicate records, one of which is to be torn off, may be provided by adding a reel 122, Fig. 11, carrying a strip which passes beneath a roller 124, through a curved guide 126, beneath the platen 24 and out through a slot 128. The roller 124 is geared to the spindle of the first paperreel so that the second strip moves about six times as fast as the first. The ink-ribbon is led between the type and the second strip and back between this strip and that to be retained in the apparatus. In a modified construction, electric control is replaced by a Bowden wire, and the lever 18 by a hollow lock-barrel actuated by any one of a series of keys, the record made indicating which key-user is responsible. The insertion of a key 140 into the pivoted hollow lever 158 first pushes aside a catch 162. The lever 164 is thus released and falls forward until its end snaps into a recess in the underside of the key and prevents withdrawal. The spindle 170 of arm 164 carries an arm to which is connected a pivoted hook held by a spring in the path of the pump plunger which is thus released for operation by the movement of the arm 164. A lever 182 pivoted to and passing into the hollow lever 158 has its upper end in the path of the key, while a pin 186 abuts against a second lever 188 also pivoted to the hollow lever 158. The movement of the key against lever 182 allows lever 188 to swing until a pin 192 on lever 164 is just above a notch 190. The pump-delivery mechanism sets the type-wheel through a lever 204 and slide 156 which acts on the lever 80 controlling the ratchet advancing pawl 76. The key is then depressed, lifting the type-wheel into printing position, and allowing pin 192 to enter notch 190. During the return downward movement the bar 188 swings down the arm 164 sufficiently to release the key 140. At the same time, the pawls 74, 76 are released by a weighted detent 208 formed as a bell-crank lever rocked by a cam on the slide 156, and the type-wheel returns to zero under the influence of its enclosed coil spring. The. paper reel is advanced by pawl 196 mounted on a slide 194, having a pin and slot connection with the end of the hollow lever 158. In order that the keys may print distinctively, type-levers 212 corresponding in number and outline to the keys are pivoted at 214. Printing and the return to zero position may be effected automatically by the return to initial position of an operating member of the delivering apparatus. Electromagnetic means may be so employed, or the hanging up of the delivery nozzle may be the actuating medium. The Provisional Specification describes a construction in which operation is effected by a sliding bar having a V-notch engaged by a link depending from the platen mechanism. As the bar is withdrawn, the end of the link is lifted, trails along a serrated portion and drops into a semicircular notch. A small pivoted dog is drawn along by the link, and prevents reversal except at the extreme positions by jamming in the serrated part of the bar. Rack teeth are also formed on the bar and mesh with a pinion for turning the paper feed rollers. A ramp formed on the bar disengages the pawl holding the typewheel, and permits the latter to return to zero. A small projection advances the ink-ribbon. The paper strips are wider than the type-wheel permitting signature by the attendant, and the use of different price-scales, and affording a blank zone for use where liquid is to be withdrawn for a purpose other than sale.