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US Patent: 66,354
Improvement in gear-cutters
Patentee:
H. N. Keables - Worcester, MA

USPTO Classifications:
144/218, 144/240, 407/61

Tool Categories:
metalworking machines : milling machines : milling machine cutters

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Thomas H. Dodge
D. L. Miller

Patent Dates:
Granted: Jul. 02, 1867

Patent Pictures:
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Description:
As cutters have heretofore been made the cutting-teeth A have followed each other in regular order and at equal distances apart, and those who. are acquainted with or skilled in the art of gear-cutting know that oftentimes the chips so clog, up and crowd in between the cutting-teeth and the sides-of the cogs on the blank being cut as to injure the work, arid often to such an extent as to derange the whole operation. In a large class of work it is very important to have the sides of the cogs cut with great precision and evenness, and it is a great source of annoyance and expense to-have the work injured by the clogging or chattering of the cutters. To remedy the foregoing and other objections to the old style of cutters is the object of my present invention, and which consists in leaving a clearing space, a, at regular and equal distances apart, and which distance I have found to produce the best results, if arranged so as to occur after two teeth, as shown in fig. 1. It might occur after three or more teeth, but I prefer two teeth. The result is that the cutter always runs, smooth and easy, doing its work even and true, and never clogging up. The same principle could be applied with good effect to "side" or "slabbing" cutters, as they are called. With my cutter there is no chattering, and the work is unequalled, besides it requires less power to drive the cutter than it does to drive one of the same size made according to the old plan. The mode of using the cutter is the same as that in common use, the cutter being placed upon a revolving arbor, spindle, or similar device.

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