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- Sperry Rand Corporation - Sperry New Holland Division Catalog, "TR70 Twin Rotor Combine," 1977 - Engineers designed the TR70 as a compact machine suitable for hilly terrain. The twin rotors (TR) shelled corn or threshed grain and moved it through the combine's body. Setting the rotors at an angle (axial) shortened the machine. Farmers changed the front-end attachment to harvest corn, beans, or wheat. Photographs and diagrams in this catalog helped explain additional features.
- 1977
- Collections - Artifact
Sperry Rand Corporation - Sperry New Holland Division Catalog, "TR70 Twin Rotor Combine," 1977
Engineers designed the TR70 as a compact machine suitable for hilly terrain. The twin rotors (TR) shelled corn or threshed grain and moved it through the combine's body. Setting the rotors at an angle (axial) shortened the machine. Farmers changed the front-end attachment to harvest corn, beans, or wheat. Photographs and diagrams in this catalog helped explain additional features.
- Sperry-New Holland Catalog, "The Innovators," 1977 - For centuries, manufacturers have worked to perfect machinery that combines the three major steps of harvesting grain: reaping, or cutting the crop; threshing to loosen the grain from the chaff; and disposing of the straw while retaining the grain. Since self-propelled combines were introduced in the 1930s, competitors have produced ever-improving models. This catalog advertised a range of combines from Sperry Rand Corporation's New Holland Division.
- 1977
- Collections - Artifact
Sperry-New Holland Catalog, "The Innovators," 1977
For centuries, manufacturers have worked to perfect machinery that combines the three major steps of harvesting grain: reaping, or cutting the crop; threshing to loosen the grain from the chaff; and disposing of the straw while retaining the grain. Since self-propelled combines were introduced in the 1930s, competitors have produced ever-improving models. This catalog advertised a range of combines from Sperry Rand Corporation's New Holland Division.