Boots – shoes – and leggings
Patent
1986-12-16
1989-03-14
Lall, Parshotam S.
Boots, shoes, and leggings
250223R, 209576, G06F 1520, B65G 4700
Patent
active
048129828
ABSTRACT:
In an apparatus for recognizing the positions, adjustable in a specific number of steps, of at least two code marks, relative to a fixed third code mark the code marks are moved relative to a read station including a specific number of code readers. The code readers are connected to a multiplexer system controlled by an address counter which interrogates the code readers sequentially and emits the results serially. The multiplexer system output is connected with a buffer memory unit to store and deliver the particular results. The output of the buffer memory unit is connected to the input of a priority encoder, the output of which is fed the binary code address of the sequentially highest input indicative of the presence of a code mark at the code readers. The priority encoder outputs are fed to two end buffer memories of which the inputs are in parallel. Two counting and memory pulse generating circuits are provided which are so connected with the address counter and the end buffer memories that when the first code reader following the passage of a first code mark recognizes the passage of a second code mark, the first end buffer memory assumes the output value from the priority encoder, and when the last code reader following the passage of a first code mark recognizes the passage of a second code mark, the second end buffer memory assumes the output value from the priority encoder.
REFERENCES:
patent: 3639728 (1972-02-01), Helfand et al.
patent: 4240148 (1980-12-01), Thoma
patent: 4325126 (1982-04-01), Thoma
patent: 4404645 (1983-09-01), Elings et al.
patent: 4591991 (1986-05-01), Sticht
Lall Parshotam S.
Melnick S. A.
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