US Patent: 1,436,522
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| Taper Boring Machine
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Patentee:
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| Howard A. Pedrick (exact or similar names) - Bala, Montgomery County, PA |
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Patent Dates:
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| Applied: |
Oct. 27, 1920 |
| Granted: |
Nov. 21, 1922 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Pedrick Tool & Machine Co.
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Description: |
| Abstract:
One object of this invention is to provide a novel mechanism for conically boring or turning the inside surface of a tubular structure, which shall be simple and substantial, as well as convenient to operate; the invention more especially contemplating a machine for cutting out a tapering cavity, which may be readily and quickly adjusted to vary the angle of the board or turned surface to the longitudinal axis of the structure operated on.
Claim:
The combination in a taper boring machine of a crank; a boring bar having one end pivoted to said crank; a bearing having a spherically curved recess; a spherically curved member mounted in said recess and formed to support the opposite end of the boring bar while permitting its longitudinal movement therethrough; and means for turning the crank. |
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