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Title: |
1882 article - circular sawmill (Alexander, Bradley & Dunning) |
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Source: |
25 March 1882 Furniture Gazette |
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Insert Date: |
6/19/2011 4:07:16 PM |
Article text:
The circular sawmill shown in the accompanying illustration is made at the works of Alexander, Bradley, & Dunning, Syracuse, New York. The frame is iron, and cast in one piece. The saw mandrel is made of steel, and runs in self-oiling boxes, which are cast in a solid yoke extending across the frame, and is adjusted by means of set screws to line the saw. The main pulley is placed outside of the frame, in order to relieve the bearing next to the saw from the strain of the main belt, and give more room between the saw and belt, greatly increasing convenience and safety in handling the lumber. This mill has an improved friction feed, which may be varied at any point to feed slowly while passing through a knot by pressing with less force upon the feed lever, or the carriage may be instantly stopped by throwing the feed lever over. The sawyer sets the log and operates the carriage, thus saving one man's labour. These machines are furnished with Carley's improved head-blocks with screw or lever set as preferred. The screw set has a patent chain connection and taper attachment, as shown in the illustration, by means of which the screws are operated independently or simultaneously, with perfect exactness, enabling the sawyer to set to any required thickness, with great accuracy, and to advance one or both ends of the log at pleasure, without removing from his place.
When only two head-blocks are employed and idle chain wheel and stand is attached to the tail end of the carriage, as shown. This enables the sawyer to adjust the second block for long or short logs without detaching the chain. When three blocks are used the third block takes the place of the idle wheel.
An improved simultaneous ratchet set head-blocks, with rod connection, can be supplied if desired. The connecting rod is made large to avoid torsion, and is 12 ft. long for 18 ft. of carriage, 16 ft. long for 24 ft. of carriage, and 20 ft. long for 30 ft. of carriage.
The main pulley is 26 in. in diameter and 14 in. face, and the head-blocks open 30 in. Its capacity is from 10,000 to 16,000 ft. per day. |
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