Patent GB-241867-A (GB)
Title: Improvements in automatic weighing balances combined with devices for calculating the price of the material weighed
IPC: G01G19/41
Filed: 1925-08-31
Abstract: 241,867. Fischer, J. Oct. 24, 1924, [Convention date]. Computing - apparatus. - An automatic matic weighing balance combined with a device for calculating the cost of the goods is characterized by the fact that the weight values displayed by the indicator are also represented by elevations or depressions on a member, such as a drum, connected to the indicating arrangements, and from which the weight values are automatically taken for the purpose of being imparted to the device for calculating the cost of the goods. The weight, price per kg., and the cost of the goods are indicated to the seller through openings 5, 9, 13, Fig. 2. respectively; three similar openings are provided for the buyer on the opposite side of the balance. A further opening 16 on the seller's side is used to display the sum of the selling prices indicated in the opening 13. The price per kg. is set by drawing back two hand levers 8, and the computation displayed at the opening 13 is effected by giving three revolutions to a driving shaft by means of a handle 15 or by an electromotor. The goods on the scale pan are balanced by a pendulum weight and the movement of the weigh beam correspondingly rotates a drum 33, Fig. 7, bearing the weight graduations. An electric eddycurrent brake damps the vibrations. The drum 33 is provided on its cylindrical surface with a number of ribs 54, 55, 56, which are utilized for fetting the weight factor in the calculating mechanism. The rotation of the handle 15 causes a row of spring-pressed wires 63 (slidable in flexible tubes and mounted upon a rocking head 59) to be moved towards the drum surface. Detents 69 entering holes 71, 72 set the drum accurately. Some of the wires engage the projecting ribs and are thereby thrust into their tubes, causing the other ends of the wires to push out a selection of plungers 64, Figs. 9 and 10, into the paths, of three circumferential series of driving teeth 68 carried by a drum 65 which makes nine revolutions in each direction during the three rotations of the handle 15. During the forward rotation of the drum the selected driving teeth 68 are moved axially along the drum by the plungers 64 so as to engage, during the continued rotation, a series of pinions 96 - - 101. The pinions actuate a number of pinions on'the shafts 108, 113, and the latter pinions actuate a results mechanism consisting of five pinions 122 - - 126, with a known form of transfer mechanism 127, 128, 130, Fig. 16. The priceper-kg. setting-levers 8 are integral with sectors 84, Fig. 9, carrying slidable bolts 85. A cam disc 145 rotating by definite amounts relative to the drum 65 actuates the bolts 85 at moments determined by the setting of the levers 8, and causes the bolts to rock semicircular members 88, 89 about pins 86, 87. These members, in turn, displace shafts 94, 95 carrying the pinions 96 - - 101, and thus remove the pinions from the paths of the driving teeth 68 so as to leave the results wheels 122 - - 126 correctly set to the product of weight and price per kg. During the zero-setting of the results mechanism (produced by pins on the shaft 78) the product accumulated in the results wheels is brought into view in the inspection holes 13, upon numeral discs actuated by racks 132, Figs. 9 and 16, which are thrown into engagement with the results and adding mechanisms by cam mechanism when the first nine revolutions of the drum 65 have been completed. If the value accumulated in the adding mechanism is to be indicated at the opening 16 a key is inserted at a side opening in the casing and a shaft 167, Fig. 16, carrying the adding wheels is rotated to zeroize the wheels. At the same time a series of toothed segments 175 are temporarily engaged with the adding wheels and are moved proportionately in order to set the indicating segments 17 at the accumulated total. The indicating segments may be zeroized from a second key hole. By moving a key 73, Fig. 2, a driving pawl 154, Fig. 9, is disconnected from the shaft 78 to prevent the zeroizing of the results mechanism so that a succession of calculations may be accumulated and subsequently transferred to the indicator. The handle 15 is locked in its initial position by a pawl which may be disengaged by pressing a key 12. During the return rotation of the drum 65 cam mechanism resets the driving teeth 68.