Wand lamp control

Details Wand lamp control Wand lamp control

1977-03-07

1979-03-06

Thesz, Joseph M.

Communications: electrical

Digital comparator systems

3401463SY, G06K 902

Patent

active

041433580

ABSTRACT:
A lamp control for a hand-held OCR wand having a photosensor array positioned to sense light reflected into the wand through a reading aperture therein. A lamp is carried by the wand for illuminating the field facing the reading aperture. Recognition means connected to the array produces a control state when no light is reflected onto the array and a timer responsive to the control state is operable after a predetermined time delay to reduce the excitation of the lamp. Timer reset means responsive to reset of said control state restores normal lamp excitation.

REFERENCES:
patent: 3752961 (1973-08-01), Torrey
patent: 3783273 (1974-01-01), Strohschneider
patent: 3944979 (1976-03-01), Kwok

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