Patent GB-191308791-A (GB)
Title: Improvements in Weighing Machines.
IPC: G01G1/00
Filed: 1913-04-14
Granted: 1914-04-14
Abstract: 8791. Soc. Industrielle d'Instruments de PrÚcision. April 4, [Convention date]. Printing - apparatus for weighing-apparatus. -Relates to a weighing- apparatus of the kind described in Specification 17,838/06, [Class 143, Weighing - apparatus], in which the evaluation of the weights is obtained by measuring the tangents of the angles of inclination of a pendulum lever. The invention comprises mechanism whereby both the gross and net weights may be read off without the necessity of knowing the tare or making calculations. Mechanism for printing gross and net weights is provided, and locking-devices are added (1) to prevent a printed record from being obtained unless the balance has been adjusted to the position of equilibrium and (2) to lock the balance-adjusting mechanism and the printing-rollers during a printing operation. The scale-pan a, Fig. 1, depresses a lever d connected to a pendulum lever f, which is mounted as described in the above-mentioned Specification upon a lever g. The lever g is adjusted angularly by means of a nut h traversed along a screw i by rotation of a hand-wheel 1, the rotation of the screw affording a measure of the weight. An extension d<1> of the beam actuates a needle j, and in ascertaining a weight the nut h is traversed until the position of equilibrium is indicated by the needle j assuming a central position on a scale j<2>. The movement of the screw i is transmitted by a bevel-wheel m to a counter n indicating gross weights. Assuming the last weighing operation to be made with an empty jar on the scale-pan, and the jar to be now filled, the screw i is coupled by a hand-operated clutch p, Fig. 3, to a nest of wheels o, o<2>, o<3>, one of which, o<3>, drives a counter indicating net weights. This counter, when the balance is again brought to equilibrium, indicates the net weight in the jar, and counter n indicates the gross weight. Two printing-rollers r<2>, r<3> for gross and net weights respectively, are driven from the wheels m, o, and an additional roller r' set by hand, is provided for printing reference or other symbols. A ticket strip B and an inking-tape x pass between the rollers and a lever s pivoted on a bearing s'. By rotating a hand-wheel t<2>, Fig. 1, attached to a shaft t<1>, a cam t is rotated, thereby raising the lever s and impressing the ticket strip upon the type-rollers. The lever s then descends, and the ticket strip and inking-tape are fed forward by means of mutilated gearing u, v and feed-rollers y, v<3>, and the printed ticket in its descent is cut off by a knife z. A duplicate record, retained within the machine, is simultaneously made on a check strip by mechanism similar to that described above. The hand-wheel t<2> on the printing-shaft t<1> is secured by an electro-magnetically-controlled bolt t<4>, Fig. 1, which is only freed when the needle is in the position of equilibrium, thus preventing an incorrect record from being obtained. Two disks 8, 10, mutually engaging by means of a notch in the periphery of each disk are attached to the shafts 9, t<1>, and after movement of the shaft t' to effect a printing operation the disk 8 prevents movement of the shaft 9 and consequently locks the screw i and the printing-rollers.