Fill sensor for paint gun

Details Fill sensor for paint gun Fill sensor for paint gun

G - Physics

01

F

G01F 23/22 (2006.01) B05B 12/08 (2006.01) B05B 12/14 (2006.01) B05B 15/02 (2006.01) G01F 23/284 (2006.01) G01F 23/292 (2006.01)

Patent

CA 2070748

C-4,350 FILL SENSOR FOR PAINT GUN Abstract of the Disclosure A fill sensor for a paint gun provides a light sensor opposite a light source in a housing surrounding a transparent portion of paint gun overflow line so that reception by the light sensor of light radiated from the light source through the transparent portion of the overflow line is blocked when the paint gun is filled and the paint enters the overflow line, as indicated by a change from a first signal to a second signal from an electric circuit including the light sensor. A preferred embodiment of the invention uses a CdSe4 photo-resistor with a large aperture which is not blocked by small objects in the transparent portion of the overflow line and has a comparatively slow response for inherent signal low pass filtering. The electric circuit is adapted to operate through an intrinsically safe barrier for use in a manufacturing environment.

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