The collection relates to Hallett's career as an engineer and his work with engines. The collection includes correspondence, engineering notebooks, writings, photographs, patent materials, clippings, and publications,.
Hallett was an engineer for the Alamo Manufacturing Company, and designed the first Alamo Engine. While employed with the Hall Gas Engine Company he developed a heavy-duty gas engine. His last position was divisional chief engineer for the Hayes Wheel Company in Albion Michigan.
Immediate source of acquisition unknown.
Collection open for research on site by appointment. Unprotected photographs must be handled with gloves.
Collection items available for reproduction, but the Archives Center makes no guarantees concerning copyright restrictions. Other intellectual property rights may apply. Archives Center cost-recovery and use fees may apply when requesting reproductions.