Boots – shoes – and leggings
Patent
1982-11-09
1985-05-07
Atkinson, Charles E.
Boots, shoes, and leggings
370 85, G06F 1516
Patent
active
045162050
ABSTRACT:
A system for controlling access to a data transmission network of a bus configuration. After a communication unit has completed transmission of a message block, the communication unit transmits a synchronization signal over the bus. Each of the communication units of the network which has a message block for transmission responds to that synchronization signal by applying to the data bus the logical ones of the address of the associated data station, or of a virtual address resulting from an algorithm performed on that station address, the logical ones being applied in sequence during respective bit intervals. During bit intervals of the logical zeros of the station address, or of the virtual address, the communication unit monitors the bus. If during such monitoring the communication unit detects a logical one on the data bus, the communication unit terminates transmission of its logical ones and awaits the next synchronization signal. Thus, the communication unit of the highest station address, or virtual address, obtains control of the bus and only one communication unit transmits a message block at any one time, assuring there is no interference or collision of message blocks. On initialization of the system, if a communication unit monitors the data bus for a preset time without receipt of any transmission, the communication unit first transmits a logical one to the data bus and then transmits the logical ones of its station address to gain control of the bus, by the procedure mentioned above.
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Eing A. Hubert I.
Klein Rolf D.
Atkinson Charles E.
Fleming Michael R.
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