GB597803A - Improvements in and relating to weighing machines or scales - Google Patents

Abstract

597,803. Weighing-machines. VANDOME & HART, Ltd., and ANDERSON, R. A. Aug. 27, 1945, No. 22017. [Class 143] In a weighing-machine of the kind having a torsion or other form of flexible resistance associated with an indicator or pointer which indicates, on a graduated scale, weights proportional to the movements of the balance beam, such movements are transmitted to the indicator by extensions on the beam and indicator, one such extension consisting of at least two resilient members which apply equal and opposing forces to, and at'their point of contact with the other extension, thereby to make connection between the two extensions solely by contact. Between the posts 2 mounting the beam 6, is a pillar 15 forked at its upper end 16, the base 16a of the fork extending transversely from one side of the pillar and being apertured at 16b for passage of a bar member 17. Across the open top of the fork, a torsion strip 18 is anchored at 18b to one limb of the fork, and at 18c to an arm 19 pivotally mounted at 21 outside the other limb and adjustable with regard thereto by screws 22. The member 17 is connected to a horizontal bar 17a, secured at its outer end to one of the load-supporting frame structures 11, by means of a flexible portion 17b. The upper end of member 17 is bent over at 17c and carries a bar 27 adjustable by nuts 28 and provided with ears 26 formed with knifeedges 26a which engage V-depressions 30a in the outer two of three resilient fingers 30 formed in an angle piece 32 secured to a clamp structure 34 upon which the pointer 23 is carried, and mounted on the torsion strip 18. The outside fingers 30 pass beneath ears 26 and are flexed to give them an upward bias while the central finger is biassed downwards and engages by means of a A-depression with the upper edge of the bar 27 which is formed as a knifeedge.