US Patent: 3,714,714
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Drafting Machine
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Patentee:
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Edward P. Bullard, III (exact or similar names) - Trumbull, Fairfield County, CT |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Feb. 12, 1971 |
Granted: |
Feb. 06, 1973 |
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Joel Havens "Vintage Machinery" entry for Bullard Machine Tool Co.
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Description: |
Abstract
The disclosed drafting machine comprises a drafting head coupled to a main carriage supported on a main rail for movement parallel to a transverse axis. Parallel top and bottom rails support main rail carriages for movement parallel to a longitudinal axis of the main rail pursuant to positioning the drafting head to any point on the drafting surface. A drive train is incorporated for precise point to point positioning of the drafting head either under manual positioning control or automatic positioning control on the basis of numerical positioning data inputs.
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