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Title: |
1875 Article - Simplified Molding Machine |
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Source: |
September 1875 issue of Manufacturer & Builder |
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Insert Date: |
11/10/2003 9:04:59 PM |
Article text:
Simplified Molding Machine.
Most molding machines now in the market, excellent as many of them are, are subject to the objection of being complicated and expensive. Mr. J. H. Blaisdell, of the firm of J. H. Blaisdell & Co., of 405 Commerce street, Philadelphia, satisfied of this fact, has patented, and now offers to the trade, a simplified upright molding machine, of which the adjoined illustration gives a clear idea.
It is claimed, from the fact of its being cheap, simple, durable, occupying little room, and performing every variety of work, to be a very superior machine in these respects. F is the base and hollow column, extending upward, being 10 inches in diameter. Upon the outer surface of this column, commencing at the point E, a screwthread is cut, which receives the check-nut E. The circular iron table B is cast solid with the large nut C, which has a thread corresponding with that upon the column, and is screwed thereon. When it becomes necessary to raise or lower the table, it is at once accomplished by turning it upon the column, and when brought to the point desired, the check-nut is revolved upward and presses firmly against it, holding it securely at rest. It will be readily seen that in this particular the device is excellent, as it secures the stability of the revolving shaft.
Much difficulty is always experienced in making running parts of machinery at once perfectly firm and readily adjustable; and though this may be accomplished when the work is new, trouble invariably occurs when the parts become somewhat worn. In the present invention,the spindle is placed in boxes inside the column, and into this the false spindle A is fitted by a new and peculiar device.
The driving belt passes through an aperture in the column, (not shown in the engraving,) the countershaft being fitted with two belts, one straight and the other crossed, which gives a reverse motion to the spindle, which is instantly done by pressing the foot upon the shifter. F represents a door in the column, which may be readily removed for oiling or tightening the bottom bearing, and to give access to the nut below the lower box. The top bearing is tightened or loosened by adjusting this nut, since the spindle at that point is of a tapering form. The main spindle is of best cast-steel, l 1/2 inches in diameter, with three false spindles, 3/8, 5/8, and 1 inch in diameter. The top box is lined with best brass or gun-metal, and the lower box is lined with the best Babbitt metal, resting on a brass step at the bottom, each being provided with self-oiling boxes, which are claimed to run longer and with less oil than any in use, making the machine capable of adaptation to the lightest or heaviest work, and obviating much of the difficulty formerly experienced. The base is 26 inches in diameter, giving perfect steadiness, even when running at the highest speed. The machine, complete, weighs 650 pounds.
The patentees and manufacturers will cheerfully furnish all necessary particulars to parties in want of machines of this character. Counter-shaft and pulleys are furnished with every variety of molder. The same firm also manufacture and sell almost every variety of wood-working machinery in general. |
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Simplified Molding Machine
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