Print, Photographic

Black and white photographic print depicting a display from the Turning Department of the Champion Spark Plug Co. Items are labeled, "Various Types of Formed Insulators", "Hand-wheel Dressing Diamonds", "Machine-wheel Dressing Diamonds", "Templet for Dressing Wheels", "Blank Forming Wheel", and "Dressed Forming Wheel".
Typed on verso: Champion "Open House" - Sunday, October 26, 1947.
Department #4 - Turning.
Prepared by: Mr. George Hillier, Foreman.
The template shown is a 4:1 magnification of the final dimensions. The form dressing wheel is mounted on the arbor and the entire unit is placed in a turning machine when it is in use. The blank forming wheel we purchased from the Simonds Abrasive Company.
The machine wheel dressing diamonds displayed are lapped on a special diamond lapping machine whereas the hand wheel dressing diamonds are simply rough diamonds mounted in a suitable holder.