Boots – shoes – and leggings
Patent
1979-08-09
1981-02-10
Atkinson, Charles E.
Boots, shoes, and leggings
371 51, 361393, G06F 906
Patent
active
042505631
ABSTRACT:
A programmable controller with a processor module, one or more I/O modules and a rack in which the modules are supported, is expanded by replacing the processor module in a lead slot with a rack adapter module that connectes to a separate processor unit. The rack unit is converted from a controller rack to one of several I/O interface racks that can be connected to the separate processor unit. The removable processor module integrates the processing functions of the separate processor unit and the parity checking, decoding and buffering functions of the rack adapter module. The rack enclosure provides a universal connecter between the I/O modules and the module selected for insertion into the lead slot.
REFERENCES:
patent: 3942077 (1976-03-01), Powers
patent: 3942158 (1976-03-01), Dummermuth
patent: 4095094 (1978-06-01), Struger et al.
patent: 4118789 (1978-10-01), Casto et al.
patent: 4122519 (1978-10-01), Bielawski et al.
patent: 4165534 (1979-08-01), Dummermuth et al.
Allen-Bradley Company
Atkinson Charles E.
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