Wigginton Voltage Tester (0738)
Index: 0738
Year: Around 1950 ?
Maker: Square D Company, Detroit, Michigan
Dimensions: 18 x 6 x 4 cm
Info
Voltage tester of the Wigginton type. George Wigginton patented this device in 1918 (see below). The principle is via a solenoid attracting the core and as such moving the indicator.
Inscriptions:
WIGGINTON VOLTAGE TESTER
PATENTS 252484 2075860
D.C. 125 250 600
A.C. 110 220 440 550
D.C. POLARITY TEST
RED UP RED PROD POSITIVE
BLACK UP BLACK PROD POSITIVE
Cat No 5008
SQUARE D COMPANY
DETROIT MICHIGAN U.S.A.
MADE IN U.S.A.
References/Links/More Info
Wikipedia - Solenoid Voltmeter
