Geometrical instruments – Gauge – Center – point – distance between centers – or centerline location
Patent
1986-08-26
1987-12-08
Martin, Jr., William D.
Geometrical instruments
Gauge
Center, point, distance between centers, or centerline location
33178F, 33543, G01B 500
Patent
active
047110376
ABSTRACT:
A measuring device for universal application includes a parallel-crank mechanism directly rotary mounted on the slider of an isosceles centered slider-crank mechanism. The measuring element or pin is adapted on the coupler of the constrained guide mechanism. All points of coupler plane including the measuring element are moved along exactly straight lines parallel to each other at right angle to the axis of the slider. The simple change-over of a lever against its other abutment turns the active direction of a spring and enables the resetting of the measuring device from internal to external measurement. Alternatively, two-point or three-point or relative measurements can be executed. The modular unit system permits, if desired, an arrangement of two or more of the constrained guide linkages according to the invention on the sliding axis whose sliders are rigidly connected in groups of preferably three. Among all measuring elements of the same group a constrained motion exists, owing to this the measuring device is self-centered on the axis of the common slider by spring force in internal as well as in external measurement. Adaptable measuring elements enlarge the measuring range and extend the economic benefits of the device. Many difficult problems of measurement are solved in an obviously simple manner with one and the same measuring device. A measuring device according to the invention is also well suited as a measuring gripper for a handling device.
REFERENCES:
patent: 2812587 (1957-11-01), Roussin
patent: 2876413 (1959-03-01), Saurenmon et al.
patent: 3349498 (1967-10-01), Oliver et al.
patent: 3423671 (1969-01-01), Vezin
Farber Martin A.
Martin, Jr. William D.
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