Electrostatic precipitator for a light valve of the Schlieren da

Details Electrostatic precipitator for a light valve of the Schlieren da Electrostatic precipitator for a light valve of the Schlieren da

1986-08-26

1988-07-05

Laroche, Eugene R.

G02B 2600

Patent

active

047550341

ABSTRACT:
An electrostatic precipitator is provided in a light valve of the Schlieren dark field type. The electrostatic precipitator comprises two conductive surfaces within the fluid reservoir of the light valve. One of these surfaces may be the filter housing (81), and the other may be a metal coating (105) which is applied to the inner glass surface of the rear housing (53) of the light valve. By applying a constant d.c. potential across these two conductive surfaces, a resinous or lacquer build-up occurs which is composed of the fine colloidal particulate wear material and a fluid related component which are produced as a result of the normal operation of the light valve. Both the wear material and the fluid related component are too fine to be filtered by mechanical means. Because the wear material and the fluid related component form an adherent resinous material which bonds to the negative electrode, these particulates are permanently removed from the fluid.

REFERENCES:
patent: 3874786 (1975-04-01), Towlson
patent: 4533216 (1985-08-01), Orser et al.
patent: 4569739 (1986-02-01), Klinkowski

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