US Patent: 2,135,893
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| Gear cutter
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Patentee:
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| Ernest C. Head (exact or similar names) - Detroit, MI |
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Patent Dates:
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| Applied: |
Mar. 06, 1936 |
| Granted: |
Nov. 08, 1938 |
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Jeff Joslin
Vintage Machinery entry for Goddard & Goddard Co.
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Description: |
| This cutter is for making spiral-tooth gears and is not a traditional worm-style hob cutter, but rather is a crown-gear style of cutter. The innovation is a cutter-tooth shape that provides a constant pressure angle from front to back which maintains the correct tooth geometry as the cutters are sharpened. A special machine is required to grind the precise tooth shape: see patent 2,135,894. |
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