Boots – shoes – and leggings
Patent
1977-07-25
1980-08-12
Nusbaum, Mark E.
Boots, shoes, and leggings
364104, G06F 1546
Patent
active
042176581
ABSTRACT:
A process control system for controlling a set of outputs according to a multiplicity of inputs. The process control system analyzes the condition of the inputs as though they were arranged in a hypothetical ladder diagram which is a representation of the circuitry that would be required to control the loads if simple switches were interconnected, by wires, in the conventional way to control the loads. The hypothetical ladder diagram includes a plurality of hypothetical horizontal rows of circuit elements in which the circuit elements are also located in hypothetical vertical columns. All of the hypothetical vertical columns, except the last, are "input" vertical columns since they represent input circuit elements. The last vertical column contains the loads (or outputs) and is an "output" vertical column. The hypothetical input vertical column at the left end of the hypothetical ladder is first analyzed by the processing unit to determine whether there is a potential (binary 1), or no potential (binary 0), at the output of each circuit element of that hypothetical vertical column. These outputs of the circuit elements of said first vertical column are then fed back into the processor for an analysis of the second hypothetical input vertical column to likewise determine whether there is a potential (binary 1), or the lack of a potential (binary 0), at the output of each circuit element of said second vertical column. This procedure continues until all of the hypothetical input vertical columns have been analyzed. The oututs of the last input vertical column to be analyzed are then utilized by the processor to analyze the output vertical column to determine which output or outputs should be energized or de-energized to thus operate the controlled machinery.
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Henry Donald E.
Murrell Thomas A.
Schilt Marvin H.
Weaver Alfred C.
Hall William D.
Nusbaum Mark E.
Struthers-Dunn, Inc.
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