Scale balancing device in drawing machine

Details Scale balancing device in drawing machine Scale balancing device in drawing machine

1987-11-03

1989-06-13

Martin, Jr., William D.

Geometrical instruments

Straightedge type

Base attached

B43L 1302

Patent

active

048379387

ABSTRACT:
In a scale balancing device, a rotating moment balancing a moment developed by the dead load of the scale is exerted by the tension member having tensile elasticity upon the rotatable member adapted to be rotated concentrically and integrally with the scale rotating shaft while the tensile elasticity of the tension member is applied through the biasing mechanism to the same rotatable member and thereby to balance the tensile elasticity of the tension member to that the unbalanced load developing in the scale rotating shaft as a result of balancing of the scale may be balanced or reduced. Furthermore, by position-adjustment of the engaging member in the direction of the radius of the rotatable member with respect to its rotational center, a scale balancing force is easily adjusted to accommodate the inclination of the drawing board from the horizontal to the vertical or to accommodate an exchange of the scales having different weights.

REFERENCES:
patent: 4070758 (1978-01-01), Watanabe
patent: 4578872 (1986-04-01), Yoshida et al.
patent: 4580351 (1986-04-01), Yoshida
patent: 4587742 (1986-05-01), Yoshida
patent: 4601107 (1986-07-01), Yoshida

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