Vacuum delay valve

Details Vacuum delay valve Vacuum delay valve

1974-05-10

1976-08-17

Truhe, J. V.

Electric heating

Metal heating

Cutting or disintegrating

291571R, B73K 916

Patent

active

039756092

ABSTRACT:
A method of manufacturing an orifice delay valve having an apertured plate which is formed by coining a section in the plate, eroding a portion of the coined section by electrical discharge machining followed by ultra-sonic cleaning of the plate.

REFERENCES:
patent: 2588744 (1952-03-01), McKechnie
patent: 2608352 (1952-08-01), Schuster et al.
patent: 2793281 (1957-05-01), Steigerwald
patent: 3318578 (1967-05-01), Branson

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