Boots – shoes – and leggings
Patent
1994-01-07
1996-08-27
Harrell, Robert B.
Boots, shoes, and leggings
364DIG1, 364DIG2, 364228, 3642284, 364230, 3642304, 3642382, 3642383, 364240, 3642406, G06F 300
Patent
active
055509800
ABSTRACT:
A networked system having a wide variety of applications and particularly applicable to facilities management systems has multiple levels of software in processing nodes. The levels include a "features" processing level which communicates requests for data to a software object level containing databases of processes and attributes and database managers. The database managers in the software object level operate to provide data to the high level features in the same format. The software object level communicates with a hardware object level which also contains databases and database managers to mask differences between operational hardware units. By categorizing operational units by type, additional units of a known type can be added with only low level hardware object database changes. Adding units of a new type is facilitated by software changes confined to the lower level hardware and software objects, avoiding software changes at high level features. Individual software objects are tailored for typical types of inputs and output devices encountered by facilities management systems. Universal drive circuitry also provides applicability to a broad range of devices. An optical isolator is connected between signal line outputs from a node and a line driver connected to a pair of lines on a bus. Similarly, an optical isolator is connected between signal line receiving inputs and a line receiver. The signal lines can be biased to predetermined levels to reduce node sensitivity to noise.
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Burkhardt Dennis E.
Decious Gaylon M.
Garbe James R.
Gottschalk, Jr. Donald A.
Hyzer Susan M.
Harrell Robert B.
Johnson Service Company
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