Illumination – Light source and modifier – Condition responsive
Reexamination Certificate
2007-09-11
2007-09-11
Alavi, Ali (Department: 2875)
Illumination
Light source and modifier
Condition responsive
C362S318000, C250S372000
Reexamination Certificate
active
11036342
ABSTRACT:
The present invention provides a method and system for detecting operating status of the shutter. The device includes a shutter for receiving a light from a source, a solenoid for controlling movement of the shutter, and an optical sensor connected to the shutter for detecting the light received by the shutter. The solenoid produces a electrical signal indicating the solenoid operating state signal. The sensor produces electrical signal indicating open and closed stages of the shutter. The device further includes an electronic circuit for receiving both the electrical signals, and outputting an electrical output signal reflecting the operating status of the shutter.
REFERENCES:
patent: 4025795 (1977-05-01), Lackore et al.
patent: 4644899 (1987-02-01), Glaus
patent: 5444814 (1995-08-01), Hofius, Sr.
patent: 5722761 (1998-03-01), Knight
patent: 6874249 (2005-04-01), Holmes
Alavi Ali
Bauman Steven C.
Henkel Corporation
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