Apparatus for measuring the center-to-center distance between po

Details Apparatus for measuring the center-to-center distance between po Apparatus for measuring the center-to-center distance between po

1989-03-09

1990-01-16

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

400 53, 400 74, 400704, 324226, G01B 714, B41J 938, B41J 1118

Patent

active

048946141

ABSTRACT:
A center-to-center distance measuring device for measuring the exact spacing between print solenoids. The devie uses a test block having a top surface and a bottom surface which are parallel. The top surface has first and second bevel surfaces which are parallel to each other, extend from the top surface towards the bottom surface and are spaced apart at a predetermined distance. The print solenoids are positioned perpendicularly to the top surface of the test block such that the print wires of the print solenoids impact against the test block when energized. The displacement of the print wires from the solenoids is used to determine the center-to-center spacing as the print wires impact against the bevel surfaces as the test block is moved.

REFERENCES:
patent: 3740615 (1973-06-01), Vigini
patent: 4100480 (1978-07-01), Lytle et al.
patent: 4218150 (1980-08-01), Swain
patent: 4293888 (1981-10-01), McCarty
patent: 4353656 (1982-10-01), Sohl et al.
patent: 4480934 (1984-11-01), Herman
patent: 4523867 (1985-06-01), Berrey et al.
patent: 4538930 (1985-09-01), Dunfield
patent: 4547087 (1985-10-01), Heider et al.
"Matrix Printer Wire Driver Tester", Research Disclosure, May 1989, No. 241, pp. 208.
"Print Head Drive Protection Circuit", IBM/TDB, vol. 28, No. 6, Nov. 1985, pp. 2374-2375.

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