Illumination – Light source and modifier – Adjustable or repositionable modifier
Patent
1985-06-03
1986-10-21
Cuchlinski, Jr., William A.
Illumination
Light source and modifier
Adjustable or repositionable modifier
362283, 362293, F21V 908
Patent
active
046189181
ABSTRACT:
A universal filter changer for theatrical lighting units comprises a casing, a mechanism for attachment of the filter changer to the lighting unit, a set of filter holders with lighting filters, and a unit for switching the filter holders with filters between two extreme positions. This unit of a set of identical switching mechanisms the number of which corresponds to the number of the filter holders. Each mechanism is formed by a movable part which can rotate with respect to a stationary part by means of an electromagnet which controls a mechanism which in turn prepares fixing pawls for fixing the movable part, and hence the respective filter holder, with a filter in one of extreme positions of its rotation. With the use of such mechanism, the filters can be selected in any random sequence as well as in any combination. The mechanism can be controlled manually via a remote control panel or interfaced to a microprocessor-based controller.
REFERENCES:
patent: 1818718 (1931-08-01), Kliegl
patent: 2129641 (1938-09-01), Baughman et al.
patent: 2950382 (1960-08-01), Hatch
patent: 3069536 (1962-12-01), Dion et al.
patent: 3833295 (1974-09-01), Bebb et al.
patent: 4298920 (1981-11-01), Gluck et al.
Cuchlinski Jr. William A.
Pressman David
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