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Title: |
1892 Article-D. F. Walker, Grindstone Frame & Truing Device |
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Source: |
American Machinist 14 Jan 1892 pgs 5 & 6 |
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Insert Date: |
12/16/2011 2:57:21 PM |
A New Grindstone Frame and Truing Device.
In the question of grindstones versus emery wheels, for use in general machine shop work, both will have their advocates and their use. No doubt the discussion has led to more observation on the part of the users, it has led to the improvement of the emery wheels and their machines, as it has led to a better show and treatment of the grindstone. It would be as impractical to grind pocket cutlery on an emery wheel as to polish the same work on a grindstone. In the machine shop, with both at their best, very likely each would have men favoring each, and when the demand comes for the best, machines will be provided which will likely bear as little resemblance to the old wood frame as the present slide rest lathes do to the old wood-bed hand lathe.
The grindstone frame with attachments shown on the succeeding page is manufactured by D. F. Walker, corner of Front and Canal streets, Philadelphia, Pa., and possesses some points of merit worthy of consideration.
Running along each side and at the top all these parts are adjustable, and that as the stones become small they can be moved forward in the frame, so that the grinding point occupies the same convenient position as at first, and all the other attachments can be adjusted to it. And since it pays to put on a smaller pulley to run a stone at higher
speed as it wears down, the belt is easily accommodated to the new position at the same time.
It is possible by this arrangement also to put two small stones into the frame, arranged one in front of the other, their character being varied to suit different work, if desired, or one of them may be an emery or corundum wheel.
The box with its supports is cast in one piece, the opening near the bottom for cleaning being closed by a plate, which is fastened by a single central boat, so arranged that a half turn of the plate loosens it.
The truing device is a new one, and seems to be an adaptation of the familiar gas pipe used in the hand, which is a time-honored and very effective tool for the purpose. In this, the tool is tubular, and held in such a manner that it can be revolved by the larger of the two hand wheels, and moved to or from the stone by the smaller one. It is traversed across the stone by means of the screw and crank handle. Such a tool is, of course, equally efficient at all times, and when worn out is easily replaced. Any form, which can be given the stone by hand turning, can of course be given it by this device, and it can also be turned practically straight, which is not easily done by hand. The shaft boxes have covers designed to keep out dirt. |
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1892 D. F. Walker, Grindstone Frame & Truing Device
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