Patent GB-375995-A (GB)
Title: Improvements in registering or recording weighing-scales
IPC: G01G23/18
Filed: 1931-06-22
Abstract: 375,995. Weighing- apparatus. MALCHER, O., 812, Superior Street, Chicago, U.S.A. June 22, 1931, No. 18087. [Class 143.] Printed records, apparatus for giving.-A weighing scale having a registering mechanism controlled by the scale beam is provided with a spring-pressed detent for retaining an extension arm of the beam in a definite relation to the beam, and yielding means for moving the extension arm to its normal position with relation to the beam. The weight of a commodity on the platform raises the end of a scale beam 30, Fig. 4, an amount proportional to the weight. The beam takes with it a counterbalanced extension arm 45 pivoted coaxially with the fulcrum 44 of the beam and coupled to the beam by a latch 48. A spring tends to restore the extension arm to the latched position if displaced therefrom. After placing a commodity on the platform the operator rotates a handle thereby causing a cam 86 to liberate a roller 85 and permit a pair of spring-pressed jaws 64 (the front jaw not shown) to clamp the downwardly-directed end 63 of the extension arm 45. A cam on a shaft B then allows an actuator arm 95, Fig. 9, (pivoted on the frame coaxially with the fulcrum of the scale beam) to rise under spring action until arrested by the lower end of a stop screw 91, Fig. 4, carried by the gripped extension arm. The actuator arm, during its upward movement, carries a pawl 122 into engagement with a ratchet wheel 117 and during its return movement (due to the continued rotation of the cam) rotates the ratchet wheel, and this movement is passed by gearing to a sleeve 121 and thence through a resilient drive to a follower arm, also pivoted coaxially with the fulcrum of the scale beam. The follower arm moves upwards into contact with a stop screw 92, Fig. 4, the movement of the follower arm being proportional to the movement of the scale beam. A wheel geared to the follower arm drives a pair ofstepped tens and units discs 163, 164, Fig. 11, and a castellated halfpound wheel 165, which are thus set according to the weight. A notched trueing wheel 166 is attached to the stepped discs and half-pound wheel. Co-operating with these wheels and discs is a series of levers, such as the tens lever 184, controlled by cams 190 on the shaft D connected to the drive shaft A. Towards the close of the rotation of the drive shaft A the cams 190 allow the levers to move up to the stepped discs, half-pound wheel and trueing wheel, at the same time setting a series of printing or indicating segments 195 for the tens, units and half-pounds. If the stepped tens disc completes a revolution, a pinion 167 imparts a sufficient rotary movement to an adjacent shaft 219, Fig. 15, to allow a lever 215 resting on a stepped wheel 222 to fall one step and by means of a planetary pinion 213 to move a stepped block 207 through one step. The stepped block forms the abutment for the hundreds lever 183 and consequently permits the hundreds lever to rotate its printing segment so as to bring the unit digit of the hundreds denomination into printing position. Similarly, the successive hundreds digits are brought into position by further complete rotations of the tens disc. The weighing range of the machine is increased by depositing one or more weights 33, Fig. 4, on the end 32 of the scale beam, this being effected by manual operation of a shaft C. In order to adjust the printing mechanism according to the added capacity weights, a pinion or cam 231, Fig. 15, on the shaft C, operating through a lever, displaces in proportion to the weights deposited, the planetary pinion 213 and the stepped block 207 so as to change the initial setting and thereby permit the hundreds lever 183 a correspondingly greater movement in order to set the correct hundreds digit of its printing segment. After the weight has been set up on the type segments 195, Fig. 11, a cam on the drive shaft A permits a platen frame 245 to swing about a pivot 246 and press a paper strip 251 (passing over a platen 248) against the type segments. An ink ribbon, driven intermittently from the drive shaft A in one direction or the other according to the setting of a finger-knob, is interposed between the paper strip and the type. The paper strip may be fed forward by means of a finger-knob and the printed ticket torn off against a stop plate 259. A spring-pressed frame 260 prevents overrunning of the paper roll 252. A pair of stops 262 controlled by the movements of the stepped tens disc and the cam shaft D prevent a printing movement of the platen frame 245 being effected under a " no load " condition in the event of the mechanism failing to return accurately to zero position owing to the scale being out of adjustment. Loose-weight apparatus.-In Fig. 22 an arrangement is shown whereby tihe weighing capacity of the machine may be increased by rotation of a hand-wheel 325. The shaft 305 of the hand-wheel drives, by means of gearing 324, 323 a countershaft 319 connected by mutilated stop gearing 320, 321, 322 with the bell-crank levers supporting the capacity weights 301, 307, 308. The first movement of the hand-wheel lowers the capacity weight 301 on to the scale beam support 300 and the subsequent movement deposits the weights 307, 308, these two weights together being equal in effect to the weight 301.