USRE62E - Improvement in machines fo-r cutting shingles - Google Patents

Description

JASON C. GILLETT, OF BLOOMFIELD, MICHIGAN.

IMPROVEMENT IN MACHINES Fos CUTTING sI-IINGLEs.

Specification forming part of Letters Patent No. 2382, dated Dccunber 20, 1843; Reiss ne No. 62, dated April 20, 1844.'

To all whom it may concern Be it known that I. JAsoN C. GILLETT, of Bloomfield, in the county of Oakland and the State of Michigan, have invented a new and Improved Machine for the Cutting of Shingles, and by means of which stuff of different kinds may be cut of equal thickness for every variety of use, which machine I have denominated the self-feeding shingle and wood cutter; and I do hereby declare that the follow ing is a full and exact description thereof.

In the accompanying drawings, Figure is a perspective representation of the machine, and Fig. 2 a top view thereof.

Ineach of these figures the same letters of reference are used to designate the same parts.

The frame is shown as consisting of four posts, a a, and of two ties, b b,wl1ivch are framed into the posts near their lower ends. These ties cross each other at their middles, where they are halved together. They serve to receive a step in which runs the vertical shaft of a horizontal wheel or table, (shown at t Ji.) This table carries two knives, k k, which by its revolution are made to cut the shingles or other stuff from any suitable timber which has been previously sawed into scantling and cut into blocks of the proper length. The timber to be cut is placed within stationary hoppers or boxes ff above the table, there being four of A these represented in the drawings; but their number may be increased hoppers or boxes may be formed, as shown in the d ing the posts a a above th to them pieces of plank c c d d, which pieces are to be at such distance apart as may be necessary to admit the widest stuff that is to be cut: The plank c c d d, which constitute the sides of the hoppers, cross each other at right angles, being notched or framed together so as to admit a box at e, in which the upperjournal of the shaft of the revolving table runs. A block, g, that is to be articles, is shown within'one of the hoppers. These blocks may at rst besuciently heavy to descend by their own gravity; but when much reduced this will not be the case. I therefore attach to each hopper a hammerformed lever, as shown at h It. One of these e block g.

if desired. The most conveniently rawings, by extende table, and bolting is represented as pressing on th cut into shingles or other "the reductionof the the ends ofthe hopper to receive such pieces.

The wheel z' t' may be made eitherof Wood or cast-iron,A as may also the whole frame of the machine. Th table and the dimensions of the other parts of the machine may,of course,be varied to adapt it to the purpose for which it is to be used. That which I have constructed, and from which the drawings have been made7 has the following dimensions The posts are five and a half inches square and two feet eight inches long. The cross-ties bbare of the same scantling with the posts. length in the clear and four inches and a half in width. Their sides c c d d are of two-inch plank and seven inches in width.

When the table is made of wood, it must be sufiiciently thick to insure its stability, and it may then be driven by a belt which will embrace its periphery. When it is of cast-iron, the proper width to receive the belt may be given to its periphery by means of a flange cast thereon. The upper sides of the knives k k are even With the surface ofthe wheel or table z' t', and they are so placed upon it as that only one of them shall be inthe act of cutting at the same time.' For this purpose the spaces between them are unequal. Their exact position in this respect would be such as that a vertical plane passing through their edges Would form au angle of about one hundred and fortyone degrees on one side and of about two hundred and nineteen degrees on the other.

Vhen the table is constructed of wood, I make the knives seven inches wide. When it is of iron, knives of .tive inches in width will be sufficient. They are to be firmly secured on the table by screwbolts at their ends. From the position in which they are placed they out the timber obliquely to its grain, and as they run within a sixteenth of an inch of the lower ers are so arranged as that e diameter of the wheel or The hoppers are eighteen inches in f regulating of the knife,

edges of the hoppers, this eiectually prevents the spoiling or splitting of the stuff as they pass through it. The bevel given to the knives in grinding I have found to be a thing of great moment, as upon this and the position of their cutting-edges their due operation is dependent. The under side of each of the knives has a bevel of three-sixteenths of an inch to the inch for the first three inches back from the edge, and is slightly concave. The upper side bevels one-sixteenth of an inch to the inch, such bevel extending to the width of one inch only from the edge, the remainder of the upper side of the knife being on the same horizontal level with the same table. Any considerable departure from this form of the knife interferes with its proper operation. The bevel on its upper side counteracts -its tendency to risea tendency which 'is the result of the necessary bevel on its lower side. The thickness of the shingle or of any other article to be cnt is not to be regulated. by the as the upper surface of this is always to remain on the plane of the upper surface of the table, and the thickness or form of the article when cut is determined by the construction of the table itself. Before the edge of each knife an excavation is to be made in the table of such length and width as will admit the block to be cut, and to such depth as will correspond with the intended thickness ofthe article, and from the back ofthe knife to this part the face ofthe table is to constitute an inclined plane, down which the block will descend as it is approached by the edge of the knife.

When shingles are to be cut, the excavations in front of the edge of the knife must correspond at one end with the thickness to be given'to the butt, and at the other to the thickr ness of the point or thin end, and in the two excavationsthese will be reversed, the thick end in one being toward the circumference and in the other toward the center of the table.

Having thus fully described the manner in which I construct my machine for cutting shingles and other articles of wood, and explained the operation thereof, I do hereby declare that I do not claim the use of a horizontal rotary wheel or cutting-knives when taken alone; but I K What I do claim as of my invention, and desire to secure by Letters Patent, is

The manner in which I have arranged-and combined the hoppers or boxes to receive the stuff to be cut with the hammer-levers, with the horizontal table, and with the knives attached thereto, said'knives being so arranged inthe manner represented as that one shingle or other article shall be cut by onev knife before the other begins to operate, in the case of a shingle the butt being cut by one knife toward the shaft and by the other toward the periphery of the wheel. i

\ JASON C. GILLETT.

NVitnesses:

F. A. FLOWER, JAS. Gow.

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