Patent GB-353639-A (GB)
Title: Improvements in or relating to weighing devices for use in connection with cigarettemaking machinery
IPC: G01G19/00
Filed: 1930-06-19
Abstract: 353,639. Weighing-apparatus ; dashpots. BEST, C. and MOLINS MACHINE CO., Ltd., 2, Evelyn Street, Deptford, London. June 19, 1930, No. 18731. [Class 143.] Weighing apparatus fitted to cigarette-making machines; automatic-feed weighers.-In an apparatus for weighing cigarettes and recording variations in the weight from a given standard upon a chart, means are provided to ensure that a record .is effected only when a number of cigarettes comprising a batch has been correctly counted by the device which transfers cigarettes from the supply hopper to the weigh-pan. The invention is described as applied to the apparatus forming the subject-matter of Specifications 260,744 and 292,699, [both in Class 143, Weighing-apparatus]. A batch of cigarettes is transferred from a supply hopper 18, Fig. 1, into a trap 29 by a single rotation of a fluted cigarette-counting drum 19 upon the operation of a handle 56. Surplus cigarettes in the supply hopper are then released to fall into a tray 18c or on to a moving band 38 by the tilting of the bottom 18a of the hopper, released by a stud 19a on the drum. An arm 36 controlled by a cam 33 rotating with the drum moves downwardly to tilt and discharge the contents of a weigh-pan 2, and on its return movement opens the discharge gate 31 of the trap 29 to allow the counted cigarettes to enter the weigh-pan. The weigh-pan is suspended from a beam 1 and counterbalanced by a weight 3. Computing apparatus.-A pointer 15 depending from the beam indicates on a chart 16 the number of cigarettes per unit-weight by which the sample in the weigh-pan is above or below the desired number of cigarettes per unit-weight. A number of weights 3 corresponding to different desired numbers of cigarettes per unit-weight are provided and a slidable poise 17 is adjusted on the pointer to a position corresponding to the weight in use to make the deflections of the pointer of equal value in all circumstances. Printed records, apparatus for giving.-A strip of paper 40, Fig. 3, is drawn from reel 41 by rollers 42, 51 and passes through a pivoted frame 45 in close proximity to a needle 48 attached to the weigh-beam 1 by a blade spring 49. After each weighment, the frame is released and moves towards the needle which perforates the strip. The strip may be printed longitudinally in a manner corresponding to the chart 16, or may be perforated by the feed rollers in three longitudinal lines representing correct, and upper and lower permissible numbers of cigarettes per unit-weight. In the event of one of the compartments of the counting drum 19 being empty, a stud 27 is interposed in the path of the frame 45 to prevent a record being made. The stud 27 is carried by a slide 26, Fig. I, connected through a bell crank 22 to a feeler 20 that is actuated by an empty compartment to position the stud in disabling position. A surface 24 on the feeler co-operates with a fixed roller 25 to cam the feeler upwardly out of engagement with the drum after actuation. Beams.-One arm of the beam 1, Fig. 1, is made adjustable in length by means of a sliding portion 11 which is set by a tapered screw 12 and locked . in set position by a screw 13. Dashpots.-The vibrations of the beam 1, Figs. 1 and 4, are damped by a dashpot, the piston 7 of which is attached to the beam and moves in oil in a pot 4. The piston is apertured and co-operates with an apertured valve 8 carried by a cap 9. By rotation of the cap 9, the damping effect of the dashpot may be varied, a pointer being provided to indicate the setting of the valve. An extension 10 depends from the cap to exclude dirt and prevent evaporation of the oil.