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Object ID # 1991.021.014
Object Name Tester, Magneto and Coil
Title Electrical Tester for Automotive Starter & Generator Armature Coils
Lexicon category 5: T&E For Science & Technology
Date 1930s?
Made Sun Electric Corp.
Place of Origin Chicago, Illinois, United States of America
Description Electrical tester for starter and generator armature coils, 1930s. This armature tester has a greyish-blue, metal exterior with a flat back, suggesting that it would be mounted on a wall. The tester is roughly rectangular, with some contoured and raised areas. On the front is a gauge printed with white, red, and black, surrounded by a brown metal plate. The gauge measures from 0 to 60 amperes. Below the gauge is a thumb switch marked with "Coil Output Growler" and "Ground Test." Beside the thumb switch is a convex light marked with "Ground Indicator." A small orange and silver plate is engraved with product and manufacturer's information, including "Model AT-2," "Serial number 133," and "115 volts." The manufacturer was the Sun ElectricCorp., of 6323 Avondale Ave., Chicago, Illinois. Under the metal plate is a curved, textured, red, fabric-like section. The top of the tester is printed with white text that reads "This device contains arcing or sparking parts and when used in garages, or similar establishments, should be located in rooms provided for the purpose." Coming from the top of the tester are the power cord and two small testing pieces. These two pieces have black handles and small, knurled, metal tips.
Provenance Made in Chicago by the Sun Electric Corporation.

Unknown provenance. Last belonged Gilbert Rice. He estimated that this item dates from the 1930s. Rice grew up in Massie, in Holland Township, Grey County. His father was George Rice. Gilbert became a mechanic and a member of the Bluewater branch of the Antique & Classic Car Club of Canada.
Collection Transportation, Automobiles & Equipment Collection
Material Metal/Wire/Glass/Ink/Plastic
Dimensions H-31 W-20.3 L-14 cm
Found Owen Sound, Grey County
People Rice, Gilbert
Function An armature is "a part which consists essentially of coils of wire around a metal core and in which the input current interacts with a magnetic field to produce torque in a motor". Torque is "a force that produces or tends to produce rotation" (e.g. an automobile engine delivers torque to the drive shaft).