Boots – shoes – and leggings
Patent
1977-07-01
1978-04-04
Sloyan, Thomas J.
Boots, shoes, and leggings
340184, 340347M, 340347AD, 340347DA, H03K 1320, G05D 2702
Patent
active
040829421
ABSTRACT:
A process control system of the type arranged to accept varied forms of analog sensing signals from field sensing devices, to digitally process data represented thereby, and to supply varied forms of analog control signals to field control devices. The system is characterized by signal converter means which convert data between the varied analog forms generated by the field devices and a standard form of intermediate signal, e.g., a pulse-width signal, which carries data as a function of duration. The intermediate signals facilitate signal transmission, editing, and isolation, and permit the process control system to have a simple, noise-free, easily adaptable structure. Digital interface means then convert data between the intermediate signals and digital signals in a form suitable for use by digital data processing means.
REFERENCES:
patent: 3513468 (1970-05-01), Fluegel
patent: 3585371 (1971-06-01), Dowling
patent: 3940600 (1976-02-01), Alexander et al.
Hoeschele, Analog-to-Digital/Digital-to-Analog Conversion Techniques, John Wiley & Sons, Inc., 8/68, pp. 372-381.
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 204, 205.
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, pp. I-106 to 109; III-40 to 43; III-50, 51.
Inoue Tadanari
Kataoka Koju
Mori Hiroshi
Nakagawa Mutsuaki
Tada Osamu
Sloyan Thomas J.
Yokogawa Electric Works, Ltd.
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