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Title: |
1895 Article-Perkins & Co., Universal Trimmer |
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Source: |
Chicago Journal of Commerce, 14 Jan 1895, pg. 18 |
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Insert Date: |
11/1/2012 4:33:06 PM |
Belted Universal Trimmer
Universal trimmers have, since we first introduced them to our readers, become well recognized and a standard part of modern pattern shop equipment and we present herewith a front and rear view of such a machine, which is arranged to be belted and driven by power.
The carriage, which carries the knife has a rack on the underside, which is driven by a pinion that is on the same shaft with the spur gear shown in the rear view of the machine. This gear is in turn driven by a pinion, the motion of which is reversed by what is essentially the open and crossed belt device commonly used on machinists' planers, and reversed by tappets adjustable upon a horizontal rod and struck by the carriage. The arrangement is such, however, that instead of making repeated strokes the carriage stops at the end of the return stroke; as, of course, it should in a machine of this kind. It is set in motion from either end of the machine by the handles seen at the ends of the tappet bar.
The knife has a travel of 32 inches with long bearing surface and adjustable gibs for taking up wear. At each end of the knife travel there is an adjustable gauge which can be set at any angle to the line of knife travel from 45 degrees acute to 45 degrees obtuse, thus permitting any desired angle to be trimmed from 45 to 13) degrees. Adjustable stops are located on the outside of the limit of travel of the gauges; these are seated in grooves in the main bed, and are readily shifted so as to gauge the angle of the wing to the knife, and thereby the angle of the stock to be cut. This permits the double mitering of large stock, as the wing may be thrown back out of the way.
The general features and advantages of such machines for patternmakers’ use are sufficiently well understood and, of course, power-driving will increase their efficiency, especially for heavy work. The machine is made in only one size, and will trim 30 inches wide; will double-miter 19 inches; occupies a floor space 79 x 34 inches and weighs 700 lbs. It is made by Perkins & Co., Grand Rapids, Mich. |
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1895 Perkins & Co., Universal Trimmer
1895 Perkins & Co., Universal Trimmer (Rear View)
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