Weighing scales – Self-positioning – Repositioning in response to deflection under load
Patent
1983-03-11
1985-03-12
Goldberg, E. A.
Weighing scales
Self-positioning
Repositioning in response to deflection under load
177210EM, G01G 315, G01G 700
Patent
active
045039232
ABSTRACT:
In an electromagnetic balance based on the principle of the eletromagnetic compensation of force a weight-proportional counterforce is generated by a current-carrying coil in a permanent magnet system. An arrangement with annular coil with vertical axis and with a permanent magnetic system constructed symmetrically to the central plane of the coil has proven to be advantageous. However, this arrangement results in a relatively great construction height of the balance. In order to decrease this height, the invention suggests that the soft iron pole plate which is usually present between the like poles of the plates of active magnetic material be reduced in its diameter or entirely eliminated and that the coil be allowed to extend into this area between the plates of active magnetic material. This in conjunction with the use of materials having high coercivity makes a very low constructional height possible.
REFERENCES:
patent: 3134057 (1964-05-01), Tsunoo et al.
patent: 3173067 (1965-03-01), Wright
patent: 4184556 (1980-01-01), Kunz
patent: 4283698 (1981-08-01), Fujisawa
patent: 4382480 (1983-05-01), Knothe et al.
Foster Patrick W.
Goldberg E. A.
Sartorius GmbH
Schellin Eric P.
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