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Title: |
1874 Article - Improved Shearing-Machine |
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Source: |
The Technologist, or Industrial Monthly, Vol. 5 No. 3 Mar. 1874, Pg. 70. |
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Insert Date: |
6/12/2020 10:01:05 PM |
Improved Shearing-Machine.
The accompanying engraving represents a machine designed especially for cutting sheet metals, such as boiler-plate, sheet brass, &c.; and is capable of being operated either as a hand or power machine. The prominent features of this machine are the lever movements, with the operating eccentric. Upon the end of the fly-wheel shaft is a pinion that gears into a spur-wheel upon the eccentric-shaft. This wheel and pinion are 5 to 1: the lever is 3 to 1, and vibrates on a fulcrum-pin, which is securely fixed in a strong cast frame. It is driven by the eccentric, against which it bears, shaped to form a large segmental face, and which remains in constant contact with the eccentric, transmitting the power, while the centre of such segment furnishes the mathematically correct fulcrum for the attachment, of an eccentric strap, which takes no portion of the strain, but is used simply to draw or hold the lever back against the face of the eccentric, ready to receive its impulse. The fly-wheel seen in the engraving is furnished with a handle, but it can also be used as a belt-wheel. This machine, known as Hornig's Shear, is protected by letters patent, bearing the date of February 7, 1865, and re-issued November 9, 1869. It is one of the machines constructed at the Jersey City Machine-Works. Information respecting the different sizes, weight, and price of these machines, can be had on application to the proprietor, N. B. Cushing. |
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