Patent ID: 6326562
Filing Date: 2001-12-04
Classification: G01G

Abstract:
A force measuring apparatus, comprising:(a) stationary base means;(b) load receiving means for receiving the force to be measured;(c) parallelogram guide means connecting said load receiving means for vertical movement along a path of planar translatory motion relative to said base means in a vertical plane containing the longitudinal axis of said parallelogram guide means and the direction of displacement of said load receiving means, said parallelogram guide means including a single pair of horizontal vertically-spaced planar guide members (47, 48) that are rigid within their respective planes and are elastically flexible transverse to their respective planes, each of said guide members including a stationary end connected with said base means, and a movable end connected with said load receiving means;(d) measuring transducer means connected with said base means for producing a signal corresponding with the force to be measured;(e) force transmitting means including at least one lever for transmitting motion by said load receiving means to said transducer means;(f) said base means having an H-shaped cross-section and comprising:(1) a horizontal base plate (2); and(2) a pair of parallel spaced vertical side plates (3) connected with and arranged normal to said base plate, said base means extending between said parallelogram guide members with said stationary ends of said parallelogram guide members being connected with said side plates;(3) each of said side plates containing a horizontal slit (91) adjacent said stationary end of one of said parallelogram guide members; and(g) adjustment means (95) for adjusting the width of said slits in a direction transverse to the planes of said parallelogram guide members, thereby to precisely adjust the relative positions of said guide members.