- A restored Schwarze Electric Company Bell from patent number 1,180,445, circa 1914.
- A restored Schwarze Electric Company Bell from patent number 1,180,445, circa 1914. 3.
- A restored Schwarze Electric Company Bell from patent number 1,180,445, circa 1914. 5.
- A restored Schwarze Electric Company Bell from patent number 1,180,445, circa 1914. 2.
- A schematic drawing showing the Woodward Airbleed type turboprop engine governor.
- A vintage Caterpillar Company advertisement.
- A vintage Gardner Governor Company advertisment.
- A vintage Gardner Governor Company advertisment.
- Allis-Chalmers office in Wisconsin, circa 1925.
- An Allis-Chalmer Company's Plate Steel Spiral Casting for 70,000 hourse-powered Niagara Falls hydraulic turbine unit.
- Brad's restored Schwarze Electric Company Bell from patent number 1,180,445, circa 1914.
- Brad's restored Schwarze Electric Company Bell from patent number 1,180,445, circa 1914. 4
- From the vintage advertisement collection.
- Page 1 of Rufus Oldenburger's engine governor patent.
- PAGE 10