US Patent: 645,082
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| Gear-Cutting Machine
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Patentee:
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| Charles R. Gabriel (exact or similar names) - Providence, Providence County, RI |
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Patent Dates:
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| Applied: |
Dec. 02, 1898 |
| Granted: |
Mar. 13, 1900 |
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Patent Pictures:
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Joel Havens
Vintage Machinery entry for Brown & Sharpe Mfg. Co.
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Description: |
| This Gear Machine was patented in the U. K., patent #GB-190,002,533.
Abstract:
The invention relates to machines for cutting the teeth upon gear-blanks, and more especially to machines for cutting spiral gears, although certain of the combinations forming g features of invention may be embodied in machines for cutting other Forms of gearing. The primary object of the invention is to provide an efficient machine for cutting spiral gears in which the various operations are automatically performed; and i farther object is to provide a machine of this character which is adapted to cut spiral gears of varying pitch, diameter, and lead. In cutting spiral gears the gear-blank is secured upon a rotary support and is acted upon by a rotary cutter the axis of which is at an angle to the axis of the gear-blank, depending upon the diameter of the gear-blank and the lead of the teeth to be cut. The blank is o rotated and either the cutter-support or the blank-support advanced in a direction parallel to the axis of the blank, so that the center of the cutter always lies in the same plane passing through the axis of the blank. The rotary movement of the work is in a definite ratio to the advance movement between the cotter and work, which ratio depends upon the lead of the gear being cut, and this ratio is preferably accurately maintained by gearing the work-support to the reciprocating support. On the return movement of the reciprocating support the cutter should be out of cutting relation, and this is preferably accomplished by moving the cutter out of cutting relation, although, so far as certain features of invention are concerned, it may be -accomplished by moving the blank-support. After each cut the blank is given a partial rotation or indexed to bring the blank into position for the next cut and the mechanism for thus indexing the blank is preferably rotates the blank during the action of the cutter.
Claim:
In a spiral-gear cutter, the combination. of a blank-support, a reciprocating cutter-carriage, a cutter supported thereon, mechanism for so rotating the blank-support during the cutting that a spiral groove is cut in the blank, and mechanism for moving one of said supports to throw the blank and cutter out of cutting relation on the return of the cutter-carriage.
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