GB Patent: GB-190,002,533
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| Improvements in Machines for Cutting the Teeth of Gear Wheels
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Patentee:
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| none listed (exact or similar names) - Providence, Providence County, RI |
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Patent Dates:
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| Applied: |
Feb. 08, 1900 |
| Granted: |
Oct. 13, 1900 |
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Patent Pictures:
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Espacenet patent
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Joel Havens
Vintage Machinery entry for Brown & Sharpe Mfg. Co.
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Description: |
| Abstract:
he machine is for cutting the teeth of spur gears, and especially spiral gears. The primary object of the invention is to provide an efficient machine for
cutting spiral gears in which the various operations arc automatically performed, and a further 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 rott^ 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 rotated, and either the cutter support or the blank support advanced in a direction parallel to the axis of the blank so that the centre 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 cutter 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 on the 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 so constructed that the blank is indexed without disconnecting the mechanism which rotates the blank during the action of the cutter.
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