Digital electro-optical micrometer and gages

Geometrical instruments – Area integrators – Electrical

Patent

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Details

33125C, 33147N, 33DIG3, G01B 702, G01B 1936

Patent

active

040359220

ABSTRACT:
This invention pertains to an electro-optical digital precision micrometer and gages wherein one embodiment utilizes a tape carried in a frame and moved with the movable anvil portion of the apparatus. This tape is directed to and around a precision gage roller which carries a radially inscribed interrupter disc, wherein the lines on the disc cut a ray of light provided by a light source. This interruption of the ray of light is read by photosensors with the resulting pulses being converted into electrical signals which are fed to a digital counter and readout. In another embodiment the tape is carried and is moved with the movement of the movable anvil whose support also carries the precision roller whereby as the anvil is moved the tape is also moved at twice the rate of travel of the movable anvil. A dash pot system is provided in all systems so as to govern or regulate the speed of movement of the movable anvil and associated interrupter disc so that as the lines thereon cut the beam of light each line interruption is positively detected by the associated photosensor.

REFERENCES:
patent: 2788519 (1957-04-01), Caldwell
patent: 3271564 (1966-09-01), Rosenfeld et al.
patent: 3638220 (1972-01-01), Malina et al.
patent: 3658429 (1972-04-01), Zipin
patent: 3979835 (1976-09-01), Sumption et al.

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