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Title: |
1885 article on shingle, heading and box-board machine |
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Source: |
"Manufacturer & Builder". October 1885. |
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Insert Date: |
9/24/2007 12:07:14 PM |
Article text follows:
SHINGLE, HEADING and BOX-BOARD MACHINE.
The machines of which two illustrations are shown herewith, are built entirely of iron and steel, are simple in construction, strong and durable. The carriage slides on babbitted surfaces, on planed iron ways, cast on the frame and made adjustable for wear. The carriage is moved forward and back by a hardened steel roll, on the side of an upright swing lever, running in a heart-shaped cam, giving a slow, uniform feed forward and a quick return, running steady and without shock, even when at high speeds. The length of run of the carriage can be changed by raising or lowering the connecting rod in the slot on the side of the swing lever. The saw arbor is made of 2-1/4-inch steel, running in long, adjustable bearings, and the saw flange and all pulleys are perfectly balanced. Three different feeds are given by the cone pulleys---16, 28 and 40 cuts per minute, with the saw running 1,500 revolutions.
The heart-shaped cam is made on the side of a gear wheel, which is driven by a pinion on the feed shaft, hung in adjustable boxes on the back legs of the frame. This feed shaft has a large cone pulley, running loose when the carriage is at rest, and provided with an improved friction clutch on the hub of the pulley, starting or stopping the carriage instantly by a slight motion of the shipping lever. This device is intended to obviate the annoyance and expense of slipping and rapid wear to which the ordinary friction pulleys are subject.
Two shipping levers are provided, by which the carriage can be instantly started or stopped---one and the end of the machine convenient to the operator when putting in the block, the other by the side of the jointer. The one by the side of the jointer is provided with an automatic stop, so that if slightly pushed in by the hand or knee of the operator at any time the carriage will stop at the end of the stroke in position for a new block.
The set rolls are made of solid steel, the teeth are long and sharp, so that a firm hold is taken upon the block; both rolls are adjustable, thus enabling the machine to saw blocks from 10 to 30 inches long, and have the saw always cut to the center of the block. The top roll is held down by heavy coiled springs underneath the carriage, and is raised, to take in a new block, by a treadle, thus allowing the operator the use of both hands.
The setting is done by ratchets on the ends of the set rolls, operated by spring pawls connected by bell cranks to an upright rod which is rotated by a simple mechanical movement, giving a positive and uniform set, and is not affected by the position of the set rolls.
The jointer is turned true and balanced, and carries five knives; it is driven direct from the arbor, and is in such a position that the operator does not have to change his position, or turn his body even, when jointing. It is covered with an iron case, easily removed, and provided with places for two men to joint at the same time. The jointer can be detached from the machine and set in some other place if desired.
The shingle box is made of wrought iron, so shaped that while it will catch the shingles it will not fill up with sawdust. It is adjustable to conform to the position of the lower set roll, and is provided with a cast-iron plate on the upper edge, with a place cut out for the points of the teeth, and adjustable to different sizes of saws.
This machine will cut shingles, heading or box boards, from 10 to 30 inches long, and from 4 to 15 inches wide, according to the size of saw and length of block. The makers are the Chase Turbine Manufacturing Co., of Orange, Mass. |
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