US1539818A - Crosscut saw - Google Patents

Description

E. P. ARSNEAU CROSSGUT SAW Original Filed June 19, 1922 Patented June 2, 1925.

EDWARD P. ARSNEAU, OF SPOKANE, WASHINGTON.

cRosscU'r saw.

Application filed June 19, 1922, Serial To (1 whom it may (once/ it.

Be it known that l, lGnwAnn l. ARSNEAU, a citizen of the United States, residing at Spokane, in Spokane. County, and State of \Vashingtou, have invented certain new and useful Improvements in Crosscut Saws, of

which the following is a specification.

My present invention relates to improvements in cross cut saws, ot' the power operated, continuous, or chain-tooth type, and is especially adapted for cutting down or felling standing trees, and cutting up the timber or legs.

The primary object of the invention is the provision of a strong and durable device of this character which is simple both in construction and operation, is composed of a practical minimum of parts and of comparatively light weight, and which may be. manipulated with facility by the sawyers.

\Vith these ends in view the invention consists in certain novel combinations and arrangements of parts between the supporting and operating parts, and novel features of construction as will be hereinafter more specifically pointed out and claimed.

1n the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention wherein the parts are combined and arranged according to the. best mode I have thus far devised for the practical application of the principles of my invention.

Figure 1 is a plan view of a power operated saw of this type constructed accord ing to and embodying my invention.

' Figure 2 is an enlarged detail view atone corner of the yoke shaped casing or housing of the implement showing the power sprocket wheel and chain saw.

Figure 3 is a view of the same portion of the housing at the rear of the View of Figure 2 showing means for holding the implement in working position to the log or work to be cut.

Figure 4 is an enlarged, detail sectional view at line 4-4 of Figure 1' illustrating the guiding means for the chain saw as it passes around the yoke or arched housing.

The casing or housing for the chain saw, as shown in Figure 1 is in the form of a yoke, or arched frame, and comprises complementary, spaced, face plates 1, 1 of metal, cut to the required U-shape, and with widened ends. Between the legs of the No. 569,509. Renewed March 2, 1925.

yoke an inner wall and outer wall are provided, the latter designated as 2, and the former made up of three complementary strips 3 extending around inner boundary of the yoke and fixed between the face plates of the housing. Between the adjoining three strips are interposed two, spaced guide plates 4, 4, forming a track or guide way around the arch or curved portion of the yoke-shaped housing, and within the housing. The two legs of the yoke are joined by a bridge member 5, and these described members are riveted or bolted together in suitablemanner to form a rigid and well braced structure for enclosing and guiding the chain saw designated as a whole bythe numeral 6 and made up of links withlink pins at 6.

The links of the chain are arranged in pairs with cutting-teeth links 7 and 7' and intern'iediate scraping-teeth links 8.

The pairs of cutting-teeth links and the intermediate clearing-teeth links 8 are hinged together as usual on the pins 6' and,

as the chain saw is operated they cut and clear a kerf in the work, advancing as the sawing operation progresses in usual manner.

' At the back of the chain, which is formed as a sprocket chain, the links, or some of. them, are fashioned with sprocket teeth 9 for co-action with the power sprocket wheel 10. Around its peripherv the sprocket wheel is provided with rollers 11, spaced apart, and performing the function of the usual teeth .on a sprocket wheel. The chain saw passes around the sprocket wheel. which as shown is located at the end of one leg of the yoke near the termination of the bridge 5, and the rollers exert their power from the wheel on the sprocket teeth 9 of the chain, the teeth and rollers being spaced in predetermined relation.

. Circular side plates or rings 12 are attached at each side of the sprocket. wheel to enclose the rollers, and also to form guides for the chain saw in turning around the wheel. The wheel is fixed on its shaft 13 which is journaled in the yoke in suitable manner, and extends through the two plates 1, 1, of the yoke.

In the end of the leg of the yoke opposite to the power wheel 10 a guiding sprocket wheel 14 is iournaled, and it will be apparent that the endless chain or continuous flexible saw is driven fromthe power 45 gages the ratchet wheel. The lever is held sprocket wheel, 'asses around-the arch or curved end'of t p sprocket and across the bridge whe1e 1t.

1 ion.

e -yoke, around the guide is guided and held in operative The bearings vfor the guide sproc t may be ad'usted'in usual manner to take up slack in the chainsaw, and to compensate for wear of parts.

:The chainsaw is driven from a suitable source of power through the medium 0i. a flexible shaft 16' shown in F1 re 1, which is conpled \vitl1 the power ,s aft 17 that 1 forms a continuation thereof and is ournaled in bearings 18 on the exterioro the saw housing or yoke ad acent to the sprocket shaft 13, for transmission of power there- A customary type of clutch 19 is illustrated on the power shaftfor throwln the saw into on out of operation, and the clutch may be manipulated through the action of the hand levcr connection 20.

The )ower shaft 17 carries a bevel pinion 21 which meshes with a complementary bevel gear 22 on the sprocket shaft for transmittingpower from vone shaft to the other and revolve the power sprocket with the result previously described.

. Previous to starting a 0st, on a log for.

instance, the im lement ma be frictionally engaged with t 'e log to old the r1 to its work, and i {or this purpose a s arp toothed wheel 23 is. employed at the underside -of the yoke in Figure 1 and shown at in adjusted position, when turned. on its pivot 27, by means of the pawl 30 carried thereby, and is adapted to engage one of the rack teeth of the segment 31 fixed to the yoke..

In felling tr es,'. he=, yoke is held in hori- ,z ontal position and the straight ifiiglht or working portion of the saw between t e egs of the yoke, is held to its work for cutting a kerf, thethin bridge 5 of course follow-v 7 portion of the saw which 1 ing the workin is guided b t 10 bridge. In ,fellingtrees of reater ialneter than the length of the bri ge, lateral notches are first out at opposite sides of the tree to permit the assage therethrouglt of the legs of the -yo e, and j the saw cuts the kerf between these'notches. The bridge 5 holds the cutting portion of 'the saw against flexure to insure )roper action of the-teeth, and of course gui es the chain between the spaced members'of the. yoke. In cutting a horizontally disposed lo the rig is started with the "saw on top ol thelog, after-the toothed wheel 23 has been ammed into the periphery of thelogfor holding the rig. As soon as the cut is startedf the wheel may be released, andthe leg 0 the yoke will then hold the saw against side movement, as it, the leg, slides over the log, and the operator, by hearing down on the rig, makes the out.

From the above description taken in connection with my drawings it will be evident that the device as illustrated may be manipulated with facility, and because of its simplicity in construction and operation is rendered capable of rapidity in action ,for performing its required functions.

Having thusfully described my invention,-what I claim as new and desire to secure by Letters Patent is The combination with a yoke shaped housing having spaced track plates there'- in, a guide bridge connecting the opposite ends of said yo e, and a guide wheel in one end of said yoke, a power wheel in the other end of the yoke and means for revolving said wheel, a chain saw comprising pivoted links adapted to ride on the edges of said track plates and fashioned with cutting teeth, sprocket teeth on some of said links adapted to pass between said plates, and anti-friction rollers on said power wheel co-acting with said sprocket teeth. 1

r In testimony whereof I aflix' my signature. I

EDWARD P. ARSNEAU.

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