Patent GB-468440-A (GB)
Title: Improvements in and relating to electrical recording apparatus for weighing machines
IPC: G01G23/36
Filed: 1935-12-05
Abstract: 468,440. Electric signalling systems. FAIRBANKS & CO., E. & T., and HADLEY, H. A. Dec. 5, 1935, No. 33697. [Class 40 (i)] In a weighing machine wherein the results of successive weighings are added and recorded electrically, a plurality of discs set in accordance with the weight are adapted to determine the selective positioning of a corresponding number of contact arms which select solenoids for controlling the operation of the adding and recording apparatus. The weighing machine controls the setting of rotatable discs 11 .. 14, Figs. 3 and 15, and a looking disc 15, the discs 11 .. 14 being set in accordance with the digits of the weight and being provided with peripheral notches which in any set position determine the selective positioning of contact arms 68, Fig. 2, which co - operate with contact banks connected to solenoids in the adding apparatus. Weight selector fingers 16a ... 16d and a locking finger 17 mounted on slide bars 26a .. 26d, 27 are adapted to be moved into engagement with the selecting discs to position the contact arms 68 in accordance with the setting of the discs. The slide bars are normally retained in an inoperative position by a U-shaped pivoted frame 33 having a rod 39 which engages slots 47 in the slide bars and being retained in the position shown by a spring 45. The selecting fingers are adjustable on the slide bars by screws 28b. When it is desired to take a reading, a solenoid S1, energized by a push button, swings the frame 33 and releases the selector and locking fingers which are moved under the control of springs 41 into engagement with the selector discs and through racks and pinions 74, 71 set the contact arms into corresponding positions. When fully attracted, the frame 33 operates a switch SW1 which closes the selected circuits of the solenoids in the adding machine. Each solenoid S2, Fig. 9, controls a spring-controlled pivoted finger F1, the fingers being arranged in four denominational rows and the fingers in each row being of progressively different lengths. The fingers are normally in the positions shown, but when selected solenoids in the different denominational groups are energized, the corresponding fingers are attracted against spring control into engagement with abutment bars 104. The upper extremities of the fingers co-operate with notched and slidable bars 137, the notches NO .. NO8 on each bar being disposed in a progressively descending plane so that the bar may be operated through different distances according to the selective operation of the fingers F1. The bars 137 are connected through linkwork with racks 132, Fig. 8A, controlling the adding counters 157. A type setting bar 147 is also operated through linkwork 134, 135 in order to effect printing on a record strip 153. In operation, the racks 132 and bars 137 are moved into their selecting positions by the motor of the adding machine under the control of a unit OC, Fig. 13, which is operated by a solenoid S3. The solenoid which is operated by a delayedaction relav when the switch SW1 is actuated, operates, through links 181, a latch 176 which normally engages a pin 171 on a pivoted lever which operates a rod 173 adapted to engage a toggle 162 which when operated actuates a switch SW2 in the circuit of the adding machine motor. During the downward movement of the latch 176, it engages a trip plate 184 which releases the latch from the pin 171 and permits restoration of the rod 173. The solenoid also operates, during its downward motion, switches SW3, SW4, the former closing the motor circuit and the latter completing a point in series with a resetting switch, which is operated when the printing operation is completed. Specification 466,798, [Group XVIII], is referred to.