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1. Black and white photographic print depicting equipment in the product testing laboratory at the Champion Spark Plug Co

Description:
Black and white photographic print depicting equipment in the product testing laboratory at the Champion Spark Plug Co. Caption on verso reads, "Product Testing Laboratory. From left to right are shown an impact testing machine from completely assembled spark plugs, an intermittent heat shock testing device, a modified Olsen tensile strength machine, the electric furnace and recorders for determining the temperature-electrical resistivity curve for assembled spark plugs, and a falling-weight impact tester for cores."
Date Issued:
1922-01-01T00:00:00Z
Data Provider:
Detroit Historical Society
Collection:
Champion Spark Plug Co.

2. Black and white photographic print mounted on fabric depicting equipment in the Electrical Laboratory at the Champion Spark Plug Co

Description:
Black and white photographic print mounted on fabric depicting equipment in the Electrical Laboratory at the Champion Spark Plug Co.
Date Issued:
1922-01-01T00:00:00Z
Data Provider:
Detroit Historical Society
Collection:
Champion Spark Plug Co.

3. Black and white photographic print mounted on fabric depicting the Raw Material Testing Laboratory at the Champion Spark Plug Co. Caption on verso reads, "The Raw Material Testing Laboratory where the raw materials are tested before being released for production."

Description:
Black and white photographic print mounted on fabric depicting the Raw Material Testing Laboratory at the Champion Spark Plug Co. Caption on verso reads, "The Raw Material Testing Laboratory where the raw materials are tested before being released for production."
Date Issued:
1922-01-01T00:00:00Z
Data Provider:
Detroit Historical Society
Collection:
Champion Spark Plug Co.

4. Black and white photographic print depicting equipment in the Chemical Laboratory at the Champion Spark Plug Co

Description:
Black and white photographic print depicting equipment in the Chemical Laboratory at the Champion Spark Plug Co. Caption on verso reads, "Chemical Laboratory - General View."
Date Issued:
1922-01-01T00:00:00Z
Data Provider:
Detroit Historical Society
Collection:
Champion Spark Plug Co.

5. Black and white photographic print mounted on fabric depicting equipment in the Electrical Laboratory at the Champion Spark Plug Co

Description:
Black and white photographic print mounted on fabric depicting equipment in the Electrical Laboratory at the Champion Spark Plug Co. Caption on verso reads, "Electrical Laboratory where the thermocouples are tested and various instruments made."
Date Issued:
1922-01-01T00:00:00Z
Data Provider:
Detroit Historical Society
Collection:
Champion Spark Plug Co.