Leverless scale sensor

Weighing scales – Self-positioning – Electrical current generating or modifying

Patent

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Details

177229, 73141A, G01G 314, G01G 308, G01L 512

Patent

active

041437276

ABSTRACT:
This weighing scale has a platform, a load cell supporting the platform and a base supporting the load cell. The load cell utilizes electrical strain gage elements, which are connected in an electrical circuit controlling an indicator. The scale is constructed to be unaffected by the eccentricity of the load on the platform. The scale is particularly suited for use in retail or other establishments, where loads are placed on the platform casually and rapidly, so that eccentric loading is common. The load cell comprises an integral block of material divided by four transversely bored holes and two horizontal slots into two relatively rigid vertical members and three relatively flexible horizontal members connecting the vertical members. The platform is supported on one of the vertical members. The base is connected to the other vertical member. The upper and lower horizontal members transfer all bending moments due to eccentric loads from one vertical member to the other. The middle horizontal member is constructed so that it is stressed substantially only by the vertical component of the load. The strain gage elements are on this middle horizontal member and thus measure only the vertical load.

REFERENCES:
patent: 3161046 (1964-12-01), Farley
patent: 3184964 (1965-05-01), Hedrick et al.
patent: 3222628 (1965-12-01), Pien
patent: 3240281 (1966-03-01), Schaevitz
patent: 3495669 (1970-02-01), Yeager et al.
patent: 3788411 (1974-01-01), Oxley
patent: 3805604 (1974-04-01), Ormond
patent: 3994161 (1976-11-01), Trozera
patent: 4020686 (1977-05-01), Brendel
patent: 4036316 (1977-07-01), Rock

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