Plastic and nonmetallic article shaping or treating: processes – Shaping or treating radioactive material
Patent
1978-01-23
1980-04-22
Sebastian, Leland A.
Plastic and nonmetallic article shaping or treating: processes
Shaping or treating radioactive material
264120, 264239, 425140, 425149, 425171, G21C 2100
Patent
active
041995392
ABSTRACT:
A method for monitoring and controlling the operation of a dual platen press used in the manufacture of nuclear fuel pellets is disclosed. The method comprises the steps of indicating the displacements of both platens and imposing the displacements of the platens on orthogonal axes such that the displacements jointly control the motion of a point which traces a lissajous figure representative of the displacement and relative velocity of the press platens. A second lissajous figure representing the desired platen movements and relative velocity may be superimposed on the first lissajous figure, differences between the first and second lissajous figures indicating deviations from the desired operation of the press. Alternately, a press operator may simply use the first lissajous figure constructed from the actual platen displacements to analyze the operation of the press. The completion of preselected portions of the first lissajous figure may be detected and used to trigger subsequent press operations. Mechanical, optical and electrical embodiments of devices for implementing the method are disclosed.
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patent: 3250993 (1966-05-01), Weaver
patent: 3559247 (1971-02-01), Larsson
patent: 3642401 (1972-02-01), Wilson
patent: 3647309 (1972-03-01), Thompson
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patent: 3763292 (1973-10-01), Stradley et al.
von Herrmann Pieter J.
Williams Ronald S.
General Electric Company
James, Jr. Ivor J.
Laub Sam E.
Sebastian Leland A.
Turner Samuel E.
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