Patent GB-505520-A (GB)
Title: Apparatus for transmitting the indications of a weighing scale to an indicating and/or recording or printing apparatus
IPC: G01G23/36
Filed: 1938-02-26
Abstract: 505,520. Electric signalling systems. BERKEL AUTO-SCALE CO., Ltd. (Aufschnittschneidemaschinen-und Schnellwaagen Fabrik van Berkel & Co., Ges.) Feb. 26, 1938, No. 6136. [Class 40 (i)] In an apparatus for transmitting the indications of a weighing scale to a recording indicating or printing apparatus, wherein the transmitter is of the type having a measuring element with holes or slots engaged by feelers, the element being moved by the instrument and the feelers controlling the distant apparatus, a similar auxiliary member is provided in order to transmit the value of the smallest unit of weight, the movement of the auxiliary element being limited to an amount corresponding to the difference between the value given by the main measuring element and the actual weight. The soft iron disc 1 provided with holes 2 arranged in eight circles and carrying one hundred teeth 7 is rotated by the weighing scale. When pushbutton 51 is depressed, push magnet 50 operates causing the bell-crank 55 to rotate, the toothed sector 46 rotating the gear' 47 and shaft 16. As cam 36 rotates, the linkage 32, Fig. 2, is displaced to the left by a spring (not shown) so that magnets 28, carried by springs 29 and normally held away from disc 1 by the rollers 31 on projections 34, may approach the disc 1, the cam also closing a switch to energize the magnets, thus locking the disc in position. Cam 18 operates lever 17 to allow pawl 11 to engage the disc so that upon cam 15 allowing rod 14 to be displaced, the main lever 9, 10 on which pawl 11 is mounted, is rotated by spring 12 until the pawl 11 engages a tooth 7. Rotation of lever 9, 10 about its bearing 8 causes pin 21 to displace projection 20 on arm 19 which constitutes the auxiliary transmitting member. Cam 44 rotates lever 43, freeing pawl 42 which engages a tooth 71 on sector 19, rotating it so that the next largest unit is recorded. Levers 26, 39 operated by cams 27, 40 depress plates 24, 37, mounted on double spring linkages 25, 38 and carrying feelers 3, 23, Fig. 6, so that the ends 4 engage the disc 1, allowing the spring contacts 90 to close if the end passes through a hole 2, the arm 19 being also provided with holes 22. The circuits to the switches carried by the feelers 3, 23 are completed when cam 45 closes switch 6. Pawl 11 causes the disc to rotate so that the feelers 3 close their circuits to give the weight to the tens element, while pawl 42 moves arm 19 to correspond to the unit figure. Upon the switch 6 being closed, corresponding magnets at the recording station, Fig: 7, are energized, the armatures causing the type wheel 95 to be revolved to show the appropriate figure. Similar type wheels to record the tens and hundreds figures are provided but not shown. The rods 98 ... 101 corresponding to the units 1, 2, 3 and 6 are displaced upwardly upon energization of the corresponding magnet. A wheel 102, having radii of curvature in the ratio 2 : 1, is arranged between rods 98, 99 and is pivoted to rack 103 which in turn engages a wheel 104 also engaged by rod 100. Wheel 104 is centrally pivoted to rack 105 in turn engaging wheel 106, pivoted to the final rack 107 which rotates the type wheel, and also engaged by rack 101. Upon magnet 50 being de-energized, bell-crank 55 is restored by spring 53, and upon switch 6 opening the type wheels are restored, while magnets 28 are de-energized and disc 1 freed.