US798819A - Parallel motion. - Google Patents

Description

No. 798,819. PATBNTED SEPT. 5, 1905. F. M. MYERS.

PARALLEL MOTION.

APPLICATION FILED APB. 18, 1904.

2 BHEETS-BHEET 1.

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No. 798,819. PATENTED SEPT. 5, 1905.

P. M. MYERS.

PARALLEL MOTION.

APPLICATION mum APB.18, 1904 2 BHEETS-SHEET 2.

ATTORNEYS FRANK M. MYERS, OF iAltlHAhE, MlSSOUhl.

PARALLEL MOTION.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed April 18, 1904. Serial N0. 203,748-

Be it known thatl, FRANK )I. Mynns, a citizen of the United States, and a resident of Carthage, in the countyof Jasper and State of Missouri, have invented a new and improved Parallel Motion, of which the following is a full, clear, and exact description.

The object of this invention is to provide means for sustaining a moving member so that said member will be given an extensive movement laterally simultaneously with and in addition to its movement longitudinally.

The invention may be employed in numerous connections, an obvious application being to stone forming machines. In these machines the saw-frame is reciprocated across the saw, and it is necessary to give the frame a movement laterally of its reciprocation to cause it to engage and disengage the stone. Ordinarily these frames have heretofore been hung on a pair of links and have, therefore, the well-known parallel motion. This causes them to strike the stone twice during one revolution of the crank-shaft, from which the saw -fran"ie is driven. By means of my invention, however, the saws may be engaged with the stones four times for each revolution of the crank-shaft, and therefore the effectiveness of the saws on the work is materially increased.

The invention resides in certain features of structure and organization,which will be hereinafter fully set forth.

Reference is had to the accompanyingdrawings, showing an embodiment of my invention, in which it is applied to a stone-sawing machine, in which drawings like characters of reference indicate like parts, and in which- Figure 1 is a front elevation of the motion applied to the usual stone-sawing machine. Fig. 2 is an end elevation of the same. Figs. 3 to 7 are diagrammatic views showing five d ifferent positions of the mechanism; and Fig. 8 is a curve, showing the course of the sawframe and having indicated thereon points corresponding, respectively, to the positions of the device as shown in Figs. 3 to 7.

According to the embodiment here shown, 10 indicates the support,and11 the saw-frame, to which the pitman 12 is connected in the usual manner. Preferably arms 11 are rigidly attachcd to the saw-frame and project upward therefrom, though these arms are not essential. Pivoted at the point 15 to the upper ends of the arms 11 are rocker-bars 16, which, preferably, are bent at their middle or pivoted portions, the end portions slanting downward from the pivots, as shown.

17 indicates the links for connecting the bars 16 with the support 10. These links are two for each bar 16 and are crossed, as shown, the ends of the links being pivoted, respectively, to the support 10 and to the ends of the bar 16.

Upon the operation of thc pitman 12 under the action of a crank or other means for imparting a reciprocating movement thereto a like movement will be imparted to the saw frame 11, and simultaneously by the action of the suspending or sustaining means the sawframe will be given an undulatory movement laterally of its direction of reciprocation, thus causing the saws in the frame to strike the stones a pluralityof times during each movement of the saw-frame. Figs. 3 to 7 show the various positions of the parts and illustrate the manner in which this undulatory movement is imparted to the saw-frame. Fig. 3 shows the saw-frame when at the left-hand end of its stroke, in which case the beams 16 lie essentially vertically and the links 17 cross each other obliquely, owing to the change in the position of the beams 16. Fig. at indicates the position of the parts upon the movement of the saw-frame to the point indicated by the numeral 1 in Fig. 8. In this position one of each pair of links 17 lies vertically, and the arm of the bar 16, which is connected to said link, also lies vertically. \Vhen the parts are in this position, the lowest elevation of the saw-frame is reached. As the saw-frame continues its rightward movemcntand reaches the center of movement the beams 16 assume a horizontal position, and the links 17 cross each other at essentially angles of ninety degrees. \Vhen the parts are in this position, the saw-frame will be raised to essentially the altitude occupied when the parts are in the position shown in Fig. 3. As the saw-frame moves rightward past its center of movement the parts will reassumc a position in which one link 17 of each pair is in alinement with the arm of the bar 16, with which said link is connected, this position being shown in Fig. 6 and being the same as that in Fig. 4. As the rightward limit of movement is reached the parts assume the position shown in Fig. 7, which is merely a reversal of that shown in Fig. 3, and the saw-frame is again raised to its higher elevation. It may be observed that during the movement of the saw-frame the action of the links 17 in changlng their guished from the usual and well-known parallel motion in which the moving part has only one movement toward the supporting part at each side of the center.

Various changes in the form, proportions, and minor details of my invention may be resorted to at Will without departing from the spirit thereof. Hence 1 consider myself entitled to all such variations as may lie Within the scope of my claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination of a support, a reciprocal member, and means for sustaining the reciprocal member on the support, said means including devices for moving the reciprocal member toward and from the support at each side of the center of movement of the said member and during each movement or part reciprocation thereof.

2. The combination of a reciprocal member, a support, an arm attached to one of said parts, crossing links pivoted to the other of said.

parts, and an intermediately pivoted bar mounted on the arm and having the links respectively pivoted to its end portions.

3. The combination of a support, a reciprocal member, and means for sustaining the reciprocal member on the support, said means including devices for moving the reciprocal member away from and thence toward the support at each side of the center of movement of said member, and during one movement or part reciprocation thereof.

4. The combination of a support,a reciprocal member, an arm projecting rigidly from the reciprocal member, an intermediately-pivoted bar mounted on the arm, and cross-links pivoted to the ends of the bar and to the support.

5. The combination of a support, a reciprocal member, crossing links pivoted to one of said parts, an arm carried rigidly by the other of said parts, and an intermediately-pivoted bar mounted on the arm and having the crossing links pivoted to its ends.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK M. MYERS.

Witnesses:

H. B. HER D, WM. B. MYERS.

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