US Patent: 575,398
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| Gear Cutting Machine with Safety Stop
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Patentees:
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| Ulrich Eberhardt (exact or similar names) - Newark, Essex County, NJ |
| Henry E. Eberhardt (exact or similar names) - Newark, Essex County, NJ |
| Fred L. Eberhardt (exact or similar names) - Newark, Essex County, NJ |
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Patent Dates:
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| Applied: |
Jun. 09, 1896 |
| Granted: |
Jan. 19, 1897 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Gould & Eberhardt
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Description: |
| Abstract:
The present invention relates to that class of gear-cutting machines in which the driving-pulley is rotated continuously and operates intermittingly and automatically upon a train of change-wheels to turn the blank into successive positions for cutting a series of teeth therein, and in which the change-wheels are sometimes connected directly with the cutter-spindle, so as to rotate the same in unison with the blank when "hobbing" or cutting worm-teeth in the same. In this class of machines the cutter is reciprocated to and from the blank by a cutterhead actuated by a feed- screw with suitable clutch mechanism to reverse its rotations automatically, and the present invention furnishes a safety-stop to hold such clutch mechanism in a neutral or inoperative position until the blank is properly rotated, and thus avoid the cutting of the same at an improper point.
Claim:
In a gear-cutter, the combination, with a cutterhead and reversing- gear having a clutch-shifter, of change-wheels and a stop-disk rotated thereby, and having a circular periphery mith notch in the edge, and a pawl suitably connected to the clutch-shifter and provided with a tooth to engage the notch, and adapted to rest upon the circular periphery of the stop-disk, and to thereby hold the clutch-shifter in a neutral position throughout the entire rotation of the disk until the tooth enters such notch. |
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