Patent GB-287444-A (GB)
Title: Improvements in or relating to weighing scales
IPC: G01G19/41
Filed: 1928-01-03
Abstract: 287,444. Dayton, Scale Co., (Assignees of Bryce. J. W.). March 17, 1927, [Convention date]. Computing-apparatus: compound-lever apparatus.-A weighing-scale includes a plurality of independent, yielding load-counterbalancing devices, and is provided with means for operating one of the devices at a constant ratio with respect to the load on the weigh-pan and for operating another of the devices at selected variable ratios with respect to the same load on the weigh-pan. In operative connection with each counterbalancing device is a chart, one chart indicating the weight and another the value of the goods on the platform. A system of levers of varying multiplying ratios is disposed beneath the platform, the levers of the system being permanently connected to the weight-indicating means and selectively connected to the value-indicating means in accordance with the price per unitweight of the goods on the platform. As shown diagrammatically in Fig. 15, the load is applied by a member 30 to a lever 31 the ends of which are supported from two series of four similar levers 40, 51. The inner end of each lever 40, 51 is permanently connected to a U-shaped weightbeam 42 in operative connection with a pendulum resistant 60 and a rotatable weight-chart 68. The inner end 43 of each lever 40, 51 is removably connected to a value-beam 44 in operative connection with a pendulous resistant 63 and rotatable value-chart 70. The load applied to the valuebeam 44 by each lever 40 is one hundredth of the weighed load and that applied by each lever 51 one tenth of the weighed load. The points of connection of the levers to the beam are spaced from the fulcrum of the beam so that the relative effects of the levers 40, 51 when in operation are 1 - - 4 and 10, 20, 30, 40 respectively. Thus the value of any weight of goods within the capacity of the scale may be ascertained for any price to 110 units by applying selected levers 40, 51 to the value-beam. Each lever 40, 51 is normally held in inoperative position by a vertically slidable member 125, Fig. 11, that is raised by a spring-actuated toggle 145 to engage the knife-edge 43 of the lever and raise it out of engagement with a stirrup 121 depending from the beam. The dead-weight of the lever is compensated for by a weight 130, Fig. 6, that is deposited upon the beam 44 upon the lifting of the lever. The toggle 145 may be broken to place the lever in operative, position by a rod 146. connected to one arm of a bell-crank lever 147, the other arm of which is provided with a tail 151 extending below a bank of keys 150. Two banks of keys, Fig. 6, are provided, the one controlling the levers 40 to set the units of the price and the other levers 51 to set the tens. Upon the depression of a key of the units bank all the bails 151 are lowered and the levers 40 put in operative position. At the same time, an extension 154 of the kev selects and rotates into inoperative position one or more catches 153 so that upon the release of the key those levers 40 corresponding to the catches 153 that have been rendered inoperative are returned into inoperative position. The levers retained in operative position by the catches, acting cumulatively, have the effect indicated on the key. The keys of the tens bank operate in a similar manner. The weights and value charts are mounted on cylindrical drums 68, 70, respectively, disposed within opposite ends of a cylindrical housing 23, Fig. 2, and viewable through windows in the housing. The price per unit-weight corresponding to the keys depressed is indicated by two graduated flanged sectors 90, 91 actuated respectively by the units and tens banks and situated within the housing 23. The sectors are independently rotated against the action of springs by tapes 92. 93 connected through lever systems to the toggles of the units and tens banks of keys, respectively. A shutter 101 actuated by a cam on the key shaft obscures the sight-opening for the sectors while a key is depressed.