Patent GB-256187-A (GB)
Title: Improvements in or relating to weighing scales
IPC: G01G1/00
Filed: 1926-06-02
Abstract: 256,187. Dayton Scale Co., (Assignees of Strachan, T. H.). Aug. 1, 1925, (Convention date]. Casings; computing-apparatus.-An automatic weighing scale having a drum indicator which prevents the housing from being withdrawn upwardly over the indicator has a detachable housing for the whole of the weighing mechanism, and the arrangement is such that the mechanism, completety tested and sealed, is fully operable whether the housing is attached or detached. In Figs. 1 and 27 the scale is shown respectively with and without the housing parts assembled thereon. The framework whereon the weighing mechanism is assembled consists of three sections, viz., a base section 50 in the form of an open spider, a column section 62 secured to the rear of the base section, and a drum-supporting section comprising a pair of end castings 72 secured upon the T-shaped head 67 of the column section. The base lever 75, provided with a usual form of bimetallic thermostat, supports the usual bearing frame 85 for the platform and is coupled by a draw-rod 101 to the lower end of a frame 103, Fig. 13, forming part of the zero adjustment device described in Specification 264,543. The zero adjustment device is connected to the weighing springs 113, by an horizontal channel bar. A slide 104 connected to the frame 103 by a tension spring 105 is provided with an aperture 108 engaging an equalizer bar 109 and may be adjusted vertically to zeroize the indicating drum by means of a screw 107 engaging a notch 106. The upper ends of the weighing springs are supported by U-shaped thermostats 121, Fig. 7, Secured to the end castings 72. Also secured to the end castings 72 are adjustable ball bearings 132 for supporting the drum shaft 128. The end castings are constructed with portions 125 of slightly reduced diameter and the ends of the computing drum 126 are extended over these reduced portions, as described in Specification 264,542. The driving racks 117 are offset from their carriers 115 so as to extend within the drum ends and thereby avoid the employment of a longer drum shaft. The reading wire 143, Fig. 27, is adjustably secured to the end castings as described in Specification 264,542. In applying the cover parts after the weighing mechanism has been assembled as shown in Fig. 27, the bottom plate is first attached by means of screws, suitable apertures being provided in the bottom plate for the passage therethrough of the scale feet 158<a>, Fig. 1. The base housing 160 which is open at the top and bottom is now passed over the base and brought into the position shown in Fig. 1, and is secured by screws passing into bosses 162, Fig. 27, projecting from the base 50. The base cover 163 having a downward flange extending slightly beyond the base housing 160 rests upon rubber studs surmounting certain of the bosses 162 and is held down by screws. The platform spider and platform are subsequently placed in position. The column casing 170 is divided vertically into two parts which are placed in position from opposite sides of the column framework and are secured thereto by screws. the abutting edges being covered by additional plates. The circular openings at the front and back of the column casing are closed by panels 236 attached by bayonet-slot fastenings, the front panel being provided with a semi-circular door 237. The drum housing consists of semi-cylindrical front and back covers 184 attached to the end castings 72 and secured together at the top by bolts. The front drum cover is provided with the usual elongated opening for a magnifying glass 194, and the rear cover is provided with the customers' reading window. A top cover 205 and end rings 211 are finally applied.