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Rhumkorff Coils
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Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famous for inventing the electrical transformer in 1904. He was also known for his bequest of what was the core of the UW-Madison rare book collection and his estate on Rock Island in Door County. This item is from the Thordarson Electric Company Electrical Laboratory and Demonstration Apparatus catalog. It is described as "induction coils for laboratory use...sealed in a carefully constructed hard rubber covering and are vacuum impregnated....Finished in walnut and black."
circa 1880-1945
Thordarson, Chester Hjörtur , 1867-1945
Publication Information
Physical Description
Collection Information
Copyright Information
W0129CY
WHi 28510
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Lamp or Exploring Coil
circa 1880-1945
Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famous for inventing the electrical transforme...
1,000,000 Volt Coil
circa 1910-1919
Workers construct a 1,000,000 volt coil at Thordarson Electical Manufacturing Company.
High Voltage Test Transformers
circa 1880-1945
Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famous for inventing the electrical transforme...
Shipping Room at Thordarson Electrical Manufacturing
circa 1910-1919
Workers get transformers ready for distribution in the shipping department at Thordarson Electical Manufacturing Company. Chester Thordarson was a Chicago inventor and manufacturer of electical ap...
Thordarson's Multiple Lighting Transformer
circa 1880-1945
Rendering of a Thordarson Electical Manufacturing Company product. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famous for inventing the electrical transforme...
Hand Winding at Thordarson Electrical Manufacturing
circa 1880-1945
Workers hand wind filament on transformers at Thordarson Electical Manufacturing Company. Chester Thordarson was a Chicago inventor and manufacturer of electical apparatus, famous for inventing th...
