- Vintage machine shop manufacturing history project.
- WESTINGHOUSE COMPANY AD, CIRCA 1919.
- A Sundstrand Machine Tool Company governor delivered on January 29th, 2020.
- A little Sundstrand transmission governor.
- Elmer Woodward adapting his water wheel type governor to control a diesel engine.
- Westinghouse Company ad, circa 1919.
- Vintage machine shop manufacturing history project.
- Westinghouse Machine Company, circa 1919 ad.
- Remembering the late John Allen, circa 1973.
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- A vintage Woodward aircraft engine governor.
- BRADFORD MACHINE TOOL COMPANY.
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- 1919
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