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US 4,755,034 AGranted
Electrostatic precipitator for a light valve of the Schlieren dark field type
AssigneeGeneral Electric Company
InventorHoward E. Towlson
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AssigneeGeneral Electric Company
InventorHoward E. Towlson
Estimating the term…
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.
In a light valve of the Schlieren dark field type having a rotatable disk spaced from an output window and a reservoir containing a light modulating fluid for coating said disk, said fluid containing impurities, said disk being partially within said reservoir and said reservoir being defined by said output window and a rear housing within which is located a gear pump and a filter within a filter housing for mechanically filtering said fluid, said filter housing serving as a first electrode, the improvement comprising:
In a light valve of the Schlieren dark field type having a rotatable disk spaced from an output window and a reservoir containing a light modulating fluid for coating said disk, said disk being partially within said reservoir and said reservoir being defined by said output window and a rear housing within which is located a filter housing including therein a gear pump and a filter for mechanically filtering said fluid, said filter housing being a first electrode, the improvement comprising:
Dependencies are inferred from the claim text.