Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1995-10-19
1997-06-03
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
25055906, 235456, G01N 2186
Patent
active
056357265
ABSTRACT:
An electro-optical sensor senses marks on a sheet which travels longitudinally with respect to a printed circuit board, carrying linear arrays of light sources (LEDs) and photodetectors and optics which define zones displaced laterally across the width of a sheet of paper, longitudinal columns of which can contain marks, the presence and absence of which marks is detected by the sensor. The sensor is especially adapted for use in detecting marks which indicate votes on paper ballots in electronic, computerized vote counting apparatus.
REFERENCES:
patent: 4114030 (1978-09-01), Nojiri et al.
patent: 4774665 (1988-09-01), Webb
patent: 5283699 (1994-02-01), Komai et al.
Global Election Systems, Inc. Accu-Vote Hardware Manual, Oct. 1991.
Grodevant Scott R.
Zavislan James M.
Lucid Technologies Inc.
Lukacher Kenneth
Lukacher Martin
Pyo Kevin
Westin Edward P.
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