US Patent: 36,903
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Improved Guide Attachment for Taps, Reamers, &o.
Tapping Guide
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Patentee:
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| Wm. Swain Hadley (exact or similar names) - Norwalk, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Nov. 11, 1862 |
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Ralph Brendler
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Description: |
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This is simple guide used to ensure that hand taps enter the hole perfectly
straight. The big improvement here is the addition of a spring to hold the
guide in place as the tap advances.
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