US392392A - Drag-saw - Google Patents

Description

(No Modem J. WINGER & J. W. BARGER.

DRAG SAW.

No. 392,392. Patented Nov. 6, 1888.

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' UNITED -STATES PATENT @FFICE.

JOHN YVINGER AND JOHN WV. BARGER, OF HARRISON, ARKANSAS.

DRAG-SAW.

SPECIFICATION forming part of Letters Patent No. 392,392, dated November Application filed February 11, 1588. Serial No. 263,700. (No model.)

To all whom it may concern.-

Be it knownthat we, JOHN WINGER and JOHN W. BARGER, of Harrison, in the county of Boone and State of Arkansas, have invented a new and Improved Drag Saw, of which the following isa full, clear, and exact description.

Our invention relates to an improvement in drag-saws, and has for its object to provide a machine that will have a force-feed, and wherein, consequently, various styles of toothed saws may be used, and wherein also the power may be readily and conveniently regulated in accordance with the work to be performed.

The invention consists in the construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar'letters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of the ma chine supported upon rigid standards. Fig. 2 is an end view of the same, in which the legs are adjustable vertically. Figs. 3 and 4 are detail views.

In carrying out the invention, Are'presents a rectangular frame, in each end of which a plate, B or B, is held to slide, and through said plates longitudinally the frame two shafts are projected, the lower one, 0, being the sawshaft and the upper one, C, afeed-shaft. The saw-shaft O is preferably located centrally of the plates and the feed-shaft to one side of the center, as illustrated in Figs. 1 and 2.

Upon one outer end of the shaft 0 the saw I) is rigidly secured,which saw is held perpendicularly downward by means of a triangular frame, d, strengthened by a transverse brace, d, and braces d,projected from one pointupon the outer end of the shaft and attached to the several members of the frame, as shown more clearly in Fig. 1.

The saw-shaft is vibrated by means of two levers, a and a, one lever,a, of which is rigidly secured at the upper end to the shaft, the other lever, a, being fulcrumed upon a stud, I), projecting from the inner side of one sliding plate near the bottom, which lever, carrying asegmental gear at its upper end, meshes with a segmental geared block, I), secured to the shaft 0, whereby the second lever acts indirectly upon the said shaft. By this arrangement of the operating levers, when one is pushed forward and the other pulled back the power on the saw-shaft 0 will be in the same direction, thus imparting double power to the saw D.

Upon one vertical standard at each end of the machine-frame, outside the sliding-plate, a vertical rack, E, is attached, and upon each end of the feed-shaft G apinion, e, is keyed, meshing with said rack. Outside of one pinion, e, a ratchet-gear, e',is secured upon the feed-shaft O, which gear meshes with a similar ratchetgear, 6 pivoted upon a stud projecting from the sliding plate. The two ratchet-gears are alternately rotated through the medium of oppositely-curved pawls h and h',fulcrumed at either end, ;of a cross-bar, h fast upon the outer end of the saw-shaft O, the lower projecting ends of which pawls'are connected by a spring, if, as shown in Fig. 1. The pawl 71, engages ratchet-gear e and the pawl h the ratchet-gear 0 From the above construction it will be observed that upon each forward vibration of the saw the pawl h engages the cogs of the gear e, pushing it around, causing rotary motion of the feed-shaft 0, whereby, by the en gagement of the pinions c with the racks E,theplates B B are moved downward, and on each backward vibration of the saw-blade the pawl h engages likewise with the gear 6, carrying it around, continuing the downward motion of the plates and saw. The pawls are adjustable upon the crossbar h ,so as to regulate the feed of the saw. The saw is raised by pulling upon a rope or chain, H, fastenedto a lever, H, fulcrumed at the top of the frame, which lever is connected with the two sliding plates by means of the rods k k, or in any other approved manner.

With a machine constructed as set forth the old-style saw need not necessarily be used. We preferably use a style of saw illustrated in Fig. 3, in which two styles of teeth are provided. The two rounding teeth at standing together, being beveled on alternate sides, form sharp edges for cutting, while the two hookshaped teeth m drag out the material.

It will be observed by reference to Fig. 2 that the frame of the machine may be made rectangular in part only, the legs constituting the remainder of the frame being inclined outward and made adjustable, as illustrated at M.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a drag-saw, the combination, with the frame, plates sliding in the ends of the frame, and a horizontal shaftjournaled in said plates, carrying a saw, of a haud-lever secured to the saw-shaft, a geared block also secured to the said shaft, and a second hand-lever having a segmental toothed head fulernmed upon one sliding plate meshing with said toothed block, and means, substantially as described, for raising and lowering the plates, substantially as shown and described.

2. In a dragsaw, the combination, with the frame, plates sliding in the ends of the frame, racks attached to said frame outside the plates, and a saw-shaft and feed-shaft journaled in said sliding plates, of ahand-lever secured to the saw-shaft, a geared block also secured to said shaft, a second hand-lever havi ng a segmental geared head fulerumed upon one sliding plate meshing with said toothed block, pinions secured upon the feed-shaft meshing with the racks, a ratchet-gear also keyed upon the feed-shaft outside one of said pinions, a second ratchet-gear pivoted upon a sliding plate and meshing with the aforesaid ratchet, and springactuated pawls fulcrumed upon the saw-shaft engaging said ratchet-gear, all adapted to operate substantially as and for the'purposes specified.

JOHN WVINGER.

JOHN XV. BARG ER.

\Vitnesscs:

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