US Patent: 3,078,400 - Phase Responsive Servosystem Control of a Variable Condition Having Positive or Negative Values


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US Patent: 3,078,400

Phase Responsive Servosystem Control of a Variable Condition Having Positive or Negative Values

Patentees:

Henry P. Kilroy (exact or similar names) - Littleton, Middlesex County, MA

James O. McDonough (exact or similar names) - Concord, Middlesex County, MA

USPTO Classifications:

318/594, 318/603, 318/608, 341/112

Tool Categories:

electrical devices : electronic circuitry and apparatus

metalworking machines : machine tool controls

Assignees:

Giddings & Lewis Machine Tool Co. - Fond Du Lac, Fond Du Lac County, WI

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Dates:
Applied:	Feb. 09, 1960
Granted:	Feb. 19, 1963

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.

Description:

Claim:

This invention relates in general to automatic systems for controlling a variable condition so that it will have different desired magnitudes. More particularly, the invention is concerned with controlling the sign of a condition which is variable in opposite senses from a zero or reference value.