Weighing scales – Equal arm type – With check link
Patent
1976-02-12
1977-09-27
Hartary, Joseph W.
Weighing scales
Equal arm type
With check link
177246, 177DIG9, 308 2R, G01G 2108, G01G 124
Patent
active
040505316
ABSTRACT:
A low-cost rugged beam balance weighing scale with an automatically aligning point contact support mechanism. The beam balance is supported centrally of a base and a pair of balance pans are each supported on opposite ends of the beam, with all supports employing a tapered male member terminating in a rounded point and a female member having a recess for receiving the rounded point of the male member. The radius of curvature of the central region of the recess is greater than the radius of curvature of the mating rounded point to ensure point contact support therebetween.
Automatic alignment is provided by providing a loose fit between a coupling portion of either the male or the female member and a corresponding mounting aperture in an appropriate support region of the base, beam or balance pan, the aperture being oval and oriented with the maximum inner dimension normal to the longitudinal axis of the beam balance. Several alternate equivalent arrangements are shown for the point contact support elements.
The scale is provided with a tare adjustment mechanism, a zero indicator and means for preventing the beam from being completely disengaged from the base.
REFERENCES:
patent: 334051 (1886-01-01), Redline
patent: 2097025 (1937-10-01), Flanagan
patent: 2914361 (1959-11-01), Turner
patent: 3133609 (1964-05-01), Lau
patent: 3174568 (1965-03-01), Eisner
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