Four-pan algebra balance having an imbalance correction mechanis

Details Four-pan algebra balance having an imbalance correction mechanis Four-pan algebra balance having an imbalance correction mechanis

1997-08-11

1999-07-27

Hafer, Robert A.

Education and demonstration

Mathematics

Arithmetic

177190, G09B 100, G01G 122

Patent

active

059279893

ABSTRACT:
A four-pan algebra balance includes an imbalance correction mechanism for maintaining a balance beam in a horizontal equilibrium position unless the imbalance between the two sides of the device exceeds a predetermined amount. The balance includes a base, an upright stand mounted to, and extending substantially vertically from the base, a crossbar mounted to an upper end of the stand so as to extend substantially horizontally and the balance beam pivotally coupled to a midpoint of the stand. A first weight receptacle subassembly including two pans is coupled to a first end of the crossbar and a first end of the balance beam and a second weight receptacle subassembly including two pans is coupled to a second end of the crossbar and a second end of the balance beam. A visual indicator provides an indication of the relative equality of the first and second weight receptacle subassemblies. Various embodiments for the imbalance correction mechanism are disclosed, including an elastic strip, band, or spring coupled between the balance beam and the stand and a bolt coupled to the balance beam and adapted to receive a nut.

REFERENCES:
patent: 784145 (1905-03-01), Donecker
patent: 3000114 (1961-09-01), Orlov
patent: 3721019 (1973-03-01), Befferman
patent: 3742619 (1973-07-01), Jenks
patent: 4713009 (1987-12-01), Borenson
patent: 5425643 (1995-06-01), Strickland

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