RONALD C BLACKMOND
Engineers in Allison Park, PA
License number
Pennsylvania PE018906E
Category
Engineers
Type
Professional Engineer
Address
Address
Allison Park, PA 15101
Professional information
Adjustable Voltage Power Supply
US Patent:
3938031, Feb 10, 1976
Filed:
Sep 3, 1974
Appl. No.:
5/502656
Inventors:
Ronald C. Blackmond - Allison Park PA
Assignee:
Robicon Corporation - Pittsburgh PA
International Classification:
G05F 140, G05F 166, G05F 308
US Classification:
323 23
Abstract:
An adjustable voltage alternating current power supply is provided which is especially suitable for supplying loads of variable resistance. The power supply consists of a transformer having two secondary windings with solid-state switches for alternatively connecting the secondary windings in either parallel or series, and with a firing control circuit for changing the connection of the windings from parallel to series at a predetermined point in each half-cycle of the voltage to adjust the effective output voltage so that constant output power can be maintained, or the output power can be varied in any desired manner.