Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1996-05-24
1998-03-31
Le, Que
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
25055932, 356375, G01N 2186
Patent
active
057341737
ABSTRACT:
A method and device for positioning moving machine parts by using two sensors to detect the spacing of code markers on a code bearing part attached to the machine part and counting the number of code markers detected while accounting for uneven spacing between code markers which invariably occur when two code bearing parts are joined for use on a single machine part.
REFERENCES:
patent: 4276480 (1981-06-01), Watson
patent: 5070238 (1991-12-01), Ishihara et al.
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