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1896 Image-G. A. Gray Co., 26" Iron Planer |
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Illustrations and Details of American Machine Tools-MIT 1896 pg 82 |
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12/9/2012 9:56:44 PM |
Messrs H. P. Gregory & Co., the agents here, have supplied the engraving above, showing a machine to plane 20 to 30 inches square, that has some features worthy of note. First, and mainly, are the massive proportions, which show an extreme of modern tendency in machine-tool practice.
The main frames have a depth or section vertically, fifty percent, greater than is common, and as the cutting strains are transverse to this section it is evident that the extra weight of metal is in the right place. Other proportions throughout, wherever strains require, are on the same scale.
There are besides, many improvements in the operating parts. The differential shifting gearing moves the belts one at a time so there is no slipping on the driving pulleys. The latter are made of large diameter, and run at a high speed so narrow belts can be employed. The return movement of the carriages or platens is three times as fast as the forward or cutting one, and the feed devices are all arranged for instantaneous adjustment. There are besides a number of points tending to endurance and good performance, which must be seen to understood.
These machines seem to be an embodiment of all the various improvements made in this country, which is a considerable claim, because while there may be some question respecting the claims of other machine tools, American metal planing machines stand prominent over those of all other countries. In England, for example, one band only is used, the reversing being done by the wheel gearing, the belt-shifting and feeding gearing are connected and operated together by the tappets, or to make it plainer, machines are made the same there as they were here, twenty-five years ago.
Messrs H. P. Gregory & Co. will keep a full line of Gray Co.'s machines here, and examples can be seen at their warerooms on Fremont and Mission Streets, in this City.
(Text from Industry Magazine, Jun 1891, pg. 182) |
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1896 G. A. Gray Co., 26" Iron Planer
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