Hanger of Stone-sawing Machines

No. 545,077.-Hanger for Stone-Sawing Machines. Application filed March 11, 1895. Patented August 27, 1895, by John B. Holmes, of Chicago, Ill.

This invention relates to improvements in hangers for the frame carrying the saws in stone-sawing machines, and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed. The objects of the invention are, first, to provide a hanger for stone-sawing machines, which shall be simple and inexpensive in construction, strong and durable, and effective in operation; second, such a hanger which will permit of the oscillating or rocking movement of the frame carrying the saws, and, third, such a hanger which, by reason of its peculiar construction, will be more durable and less liable to be damaged by the sand or small particles of stone than hangers of the ordinary make. Another object of the invention is to provide a means whereby the parts of the hanger may be readily adjusted should the same become loose or worn by continuous operation.

In order to enable others skilled in the art to which this invention pertains to make and use the same, the inventor describes it, referring to the accompanying drawings, in which:

Figure I is a plan view of the saw-carrying frame of a stone-sawing machine, showing one of my hangers at each corner thereof and the saws removed. Figure 1 is an enlarged plan view of the portion of the frame and one of my hangers. Sketch of Hanger for Stone-Sawing Machines Figure 3 is a sectional view taken on line 3 3 of Figure 2, showing the hanger in its normal position. Figure 4 is a view in elevation, partly in section, of a portion, of the saw-frame with my hanger applied thereto, showing the position of its parts when the frame is rocked or moved. Figure 5 is a vertical sectional view taken on line 5 5 of Figure 2 of the hanger detached from the frame. Figure 6 is a vertical sectional view taken on line 6 6 of Figure 5; and Figure 7 is a view showing a modification in the construction of the oscillating arm and its guide-block, the same being detached from the hanger.

Similar letters refer to like parts throughout the different views of the drawings. A represents the side rails and A' the end rails of the frame for the saws of the sawing machine, which saws may be located and secured in the said frame in the ordinary or any desired manner. The side rails A are usually formed of tubular pieces, and are united at their ends to the rails A' in any suitable manner, but preferably as shown in Figures 3 and 4 of the drawings by means of a core a, which fit within the tubular pieces A, and is secured thereto by means of bolts or rivet-pins a', which are passed through both the tube and core.

To and on the outer portion of the cores a or the ends of the side rails are secured the end rails A', which are preferably U-shaped in form in cross-section, as shown in the different views of the drawings.

One of my hangers is designed to be attached to the frame near each of its four corners, and as each of the hangers are counter-parts of one another it will be necessary only to describe one of them. Near each corner of the saw-frame the end rails A' are provided with a bearing-box B, composed of two pieces b, in which the pivot-bar C has its bearings and is secured by means of the caps b', which are secured to the pieces b by means of suitable bolts b2, which are passed through the said pieces and end rails of the frame. As is clearly shown in Figures 3, 4, and 5 of the drawings the pivot-bar C is hexagonal in shape in cross-section and has its acute angles to its top and bottom to furnish bearings for the suspending-strap and oscillating bears for the suspending-strap and oscillating arm, as will be presently explained.

As will be seen by reference to Figures 3, 3, and 4 of the drawings the pieces b constituting bearing-boxes B are placed transversely on the end rails A', and the pivot bar C is secured transversely to said pieces and longitudinally with said rails. Between the pieces b constituting bearing-boxes B and underlying the pivot-bar C is a strap D, which is bent back upon itself, and is secured at its upper ends to the suspending-rod E, which is secured at its upper end to a suitable support and in any desired manner. The strap D is formed in its lower portion with a recess d, into which is fitted a block d' of tempered steel or other hard substance. The upper surface of the block d' is formed with a slight depression d to receive the lower acute angle of the pivot-bar C. The upper portion of the strap D is provided with a vertical slot e for the reception of a wedge e' to be used for tightening the parts of the hanger should they become loose from wear by constant usage. The lower portion of the suspending rod E is provided with a slot e2 for the reception of the wedge e' and above said slot with another one e3 for the bolt e4, which is used for securing the upper ends of the strap D thereto. Just below the lower end of the suspending-rod E and between the forks of the strap D is located a block F, which is provided in its lower portion with a toothed recess f, within which is the oscillating arm G, the upper portion of which is formed with forks g to stride the tooth or projection f1 of the block F, and are rounded so as to rock or oscillate in the groove. The lower end of the arm G is provided with a recess or A-shaped depression g' for the reception and operation of the upper acute angle of pivot bar C, which engages the oscillating arm and block d' in the strap d, as is clearly shown in Figures 3 to 5, inclusive of the drawings.

In Figure 7 of the drawings is shown a modification in the construction of the oscillating arm and its guide-block F, which consists in forming the groove of the block F' with a series of teeth h instead of one tooth, as shown in Figure 5, and of providing the arm G' with a number of teeth h' to fit within the depression between the teeth h of the block.

From the foregoing and by reference to the drawings it will be seen and readily understood that by the use of these hangers the weight of the saw-carrying frame will rest upon the lower acute angles of the pivot-bars C and that as the frame is rocked or swung back and forth the oscillating arms G, resting on the upper acute angle of the pivot-bars, will yield or oscillate, as is shown in Figure 4 of the drawings, yet will hold the strap securely to the pivot-bar, thus producing uniform action of the saws on the stone. Should the angles of the pivot-bar become worn by long usage and the parts of the hanger become loose, it is obvious that by inserting the wedge into the slot e of the strap and e2 of the suspending-rod E that the strap will be raised thereon, and it is for this purpose that the slot e3 within the suspending-rod is elongated. It is further apparent that by the use of the angular-shaped pivot-bar that a very small surface is afforded upon which the sand or fine particles of stone flying from the material under the saws can have any effect and wear thereof is greatly diminished.

[Top of Page]