US315502A - Circular sawing machine - Google Patents

Description

(No ModeL) 2 Sheets-#Sheet 1.

L. HUSTON.

CIRCULAR SAWING MAGHINE.

No. 315,502. Patented Apr. 14, 1885.

livin wmf l mmf).

(No Model.)

l V2 Sheets-Sheet 2.

L. HOUSTON.

CIRCULAR SAWINC MACHINE.

Patented Apr. 14, 1.885'.

LEVI HOUSTON, OF MONTGOMERY STATION, PENNSYLVANIA.

CIRCULAR SAWlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 315,502, dated April 14, 1885. Application filed February 24, 1885. {No.modcl.)

To @ZZ whom t may concern.-

Be it known that I, 'LEVI HOUSTON, of Montgomery Station, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Circular Sawing Machines, of which the following is a specification.

Myinvention relates to that class of circular sawing machines known as swing-saws, and is designed as an improvement upon that for which Letters Patent of the United States were granted to me bearing date June 17, 1884, and numbered 300,369.

In the drawings, Figure l is a perspective view of my improved device; Fig. 2, a side view; Fig. 3, a sectional view on the line xx, Fig. 2; Figs. 4, 5, 6, and 7, views illustrating sli ghtly-different forms of the device.

Ihe objects of my invention are to simplify and cheapen the construction, make the ma? chine more compact, and render it easy of operation; and to these ends I adopt the construction shown in the drawings, in which- A A represent the hangers or brackets, which are secured to the ceiling or overhead timbers, and in which is mounted a shaft, B, which carries the band-wheel C and fast and loose pulleys D E, as usual. Loosely hung upon the shaft B, preferably between the hangers A A', is a depending saw hanger or frame, F, forked at both ends, and carrying at its lower end a shaft, G, on which is mounted a belt-pulley, II, and saw'I. The saw is provided with a guard, L, having a handle, M, by which to move the swinging frame back andA forth over the bed or table. The upper forked end of the frame F is fashioned into sleeves or bearings c a', as shown in Figs. 1 and 2, which, fitting closely against the hangers A A', prevent side play of the frame.

Motion is communicated to the pulley D by means of a belt from any convenient source, and transmitted from pulley D by a belt, K, to the saw arbor or shaft G, as will be readily understood uponv referring to Fig. l.

Upon the upper side of the sleeve or bearing c is a yoke or slotted arm, b, advisably cast upon and as a part ofthe frame F, or, if for any reason made separate, attached thereto in any convenient manner. This slotted arm or yoke is adapted to receive a stud,

f, on the lower arm, c, of a counterbalanced lever, N, which is pivoted at d to the bracket or hanger A, and provided with adjustable weight O, the stud f being provided advisably with an anti-.friction roller, e, as shown in Figs; l and 3.

If, now, the lower end of the saw be swung to one or the other side of the vertical plane of the axis of shaft B, the yoke or slotted arm b, the pivotal axis of which is in said plane, will tip or'rock the counterbalance-lever N upon its pivot d, and thus throw the weight O to one or the other side of the shaft B a dis` tance proportionate to the movement of the frame, as clearly shown in Fig. 3.

Under the arrangement shown and described the counter-balance serves to hold the saw and saw-frame back, in the position shown in full lines in Fig. 3, until drawn forward by hand, the counter-weight olfering some but not a great amount of resistance until it swings back of its pivot, from which point it aids in carrying the saw forward through the wood. The counter-balance O rapidly adjusts itself to any movement of the saw-frame F, and, being on an independent shaft distinct and separate from that of the frame, its weight is not upon said saw-frame or its shaft.

The counter-balance or weight O is made adjustable upon its arm N, in order to vary the force or action of the weight, and is held at any desiredl adjustment by means of a setscrew, l?, passing through the weight and bearing on the arm N.

It is obvious that other equivalent arrangements of the counter-weight may be adopted-- as, for instance, setting the pivot d o to one side of the shaft B and connecting the lever N and frame F by a bar, either above their respective pivots, as in Fig. 4, or below the same, as in Fig. 5, or above the pivot of4h one and below the pivot of the other, as in- Figs. 6 and 7. In each ofthese forms the arm or bar constitutes the equivalent of the yoke b.

It is obvious that instead of making the shaft `B stationary and swinging the saw frame thereon, the shaft can be secured rigidly to the frame and turn in the brackets.

The yoke or slotted arm b is closed on its top, as shown, so that when the saw-frame is tipped the stud f on its roller will come into ICO Contact With the top and limit the movement of the saw-frame, .or stops may be provided to limit the movement of the lever N or frame F.

Having thus described my invention, what I elaim isl. In combination with hangers or supports A A, and shaft B, mounted therein, sawframe F, mounted on said Shaft, as shown, and provided with an upright slotted arm or yoke, b, arm N, pvoted to the hanger A, provided at its upper end with a Weight and at its lower end with a stud to engage the yoke, as and for the purpose set forth.

2. In a sawing-machine, the combination, with suitable hangers or supports, and With a shaft extending from one to the other, of a Saw-frame carried by the shaft and provided above its pivotal point with an arm, a counterweighted lever journaled in the bracket above the saw-frame and provided with a den pending` arm to engage with and be moved by the slotted arm or yoke on the swinging frame.

3. In combination with hangers A A', shaft B, carried thereby, saw-frame F, mounted upon the shaft B, and provided above the shaft with slotted arm or yoke b, lever N, pivoted to hanger A, provided at its upper end with Weight O and at its lower end with a stud to engage with the yoke or arm Z1.

4. In combination with a swinging Sawframe, a pivoted arm or lever provided with a counter-Weight above its Cent-er of motion, and a connecting arm or bar extending from the frame to the lever, substantially as described and shown.

Lnvr HoUsroN.

Witnesses.:

F. H. MCGORMIGK, GEO. E. GRAFF.

Images