Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2005-07-21
2008-03-25
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S567000, C318S569000
Reexamination Certificate
active
07348742
ABSTRACT:
A method of making an optical filter wheel of a device synchronizable with an internal, rotatable virtual reference wheel, created in a memory of a motor controller of the device, is disclosed. The method includes a single trigger event that initializes rotation of the virtual reference wheel. The controller determines the orientation of an optical filter wheel of the device and maintains an ongoing representation of said orientation over time. The controller controls the motor, which causes the filter wheel to become coincident with the virtual reference wheel after the trigger event. A self-contained light fixture is also disclosed, which includes an optical filter wheel driven by an electric motor that is synchronizable with an internal, rotatable virtual reference wheel of the fixture. The method and light fixture permits optical filter wheels of multiple light fixtures, which may be identical, to synchronize with one another.
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Applied Motion Products “Si-1 Motor Control,” published by Applied Motion Products, Watsonville, CA (2 pages) on www.appliedmotionproducts.com, admitted as prior art, no date.
Fiberstars, Inc. “Synchronous Product Description/Installation Manual” for Models 401, 402, 404, 405(N), 501, 601—SM Master Illuminators (2 pages), printed on Jul. 13, 1999.
Bruzga Charles E.
Bruzga & Associates
Energy Focus, Inc.
Masih Karen
LandOfFree
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