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Title: |
1878 Article-Victor Sewing Machine Co., Victor Drill Chuck & Micrometer |
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Source: |
The Metal Worker, V9, 09 Mar., 1878, pg. 01 |
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Insert Date: |
11/12/2024 4:48:33 PM |
The Victor Chuck, and the Micrometer Caliper
The use of twist drills and foot lathes, increasing so rapidly as it has done for the past few years, has created a demand for a class of tools which were once comparatively unknown, namely, the self-centering chuck. Our illustrations (Figs. 1 and 2) show an external and sectional view of a chuck which combines a wide range with very great power and has at the same time many features of novelty. The chuck was patented The Paper Trade Journal publishes the by Mr. Geo. Pratt, of Middletown, Conn., June 1, 1875. It is one of the valuable features of the chuck that the power required I have been engaged in the manufacture to do the work is also made to hold the drill in position. Hence, we find that the harder the substance or the larger the hole to be drilled, the stronger the grip of the chuck upon the tool; in other words, it is a self-tightening chuck, in which the power required to do the work is a measure of the tightness with which the drill is held. Each jaw of this chuck is worked by a lever which has its fulcrum on a screw. For the sake of adjustment this lever is operated by a wedge or a follower, composed of three inclines or wedges which are operated by a screw cut on the chuck head. The screw is therefore forced by the power against the follower and that raises the lever which closes the jaws, thereby holding the drill more or less tightly according to the strain upon it. The chuck is manufactured by the Victor Sewing Machine Company. Both workmanship and material-steel-are all that could be desired.
There is probably no instrument so much needed by the fine workman as one which will make accurate measurements of small distances. Indeed, it has been often said that all our modern advancement has depended upon the ability to make measurements of precision. The little micrometer caliper, manufactured by the Victor Sewing Machine Company, which we illustrate, gives the mechanic a neat method of measuring thicknesses up to 1 inch accurately to one-thousandth of an inch, and by estimation the divisions upon the sleeve B will give the two-thousandth or four-thousandth part of an inch without difficulty. The scale upon C shows tenths and quarters of tenths. The sleeve B has 25 divisions, and as one revolution is just equal to one division upon the scale C, we have one twenty-fifth of a quarter of a tenth, or one one-thousandth for each division of the sleeve. With an instrument of this kind at hand the workman is independent of the clumsy and inaccurate wire gauge system of measuring thicknesses of sheet metal, wire &c. He can in a moment tell just what the thickness is, and can order if need be without having to use the awkward method of specifying a wire gauge number "full" or "scant”. The wide variations in the different gauges now in use make it almost imperative that the thickness of metals should be stated in decimals of an inch instead of by wire gauge numbers. When so stated there is little danger that mistakes will be made.
In making the gauge care has been taken to provide for wear of both the point of the screw B and the nut E, the adjustment being by means of the screws A and E. Altogether, the instrument is just what the mechanic needs, both in finish and convenience, and we think vastly more reliable and convenient than the vernier caliper. A table is furnished with each one, showing the decimals which equal the commonly used fractional parts of an inch.
US Patent: 164,032
https://www.datamp.org/patents/displayPatent.php?number=164032&typeCode=0 |
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1878 Victor Sewing Machine Co., Victor Drill Chuck (External View)
1878 Victor Sewing Machine Co., Victor Drill Chuck (Sectional View)
1878 Victor Sewing Machine Co., Victor Micrometer
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