Contaminant shield for viewing ports

Details Contaminant shield for viewing ports Contaminant shield for viewing ports

1992-05-04

1994-04-26

Joyce, Harold

Ventilation

Having protecting air current

Including current adjusting mean

432 32, 454188, F24F 900

Patent

active

053062094

ABSTRACT:
A dirt shield for viewing ports of contaminated environments which includes the formation of a cone of flowing gas disposed in front of the window of the port combined with a flow of ionized gas under pressure in front of the window between the window and the cone of gas.

REFERENCES:
patent: 2896854 (1959-07-01), Noble et al.
patent: 3387551 (1968-06-01), Hughes
patent: 3473905 (1969-10-01), Jago et al.
patent: 3575398 (1971-04-01), Lincoln et al.
patent: 4074620 (1978-02-01), Jansson

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