US1118577A - Sawing-machine. - Google Patents

Description

A. F. PETERS.

SAWING MACHINE.

APPLICATION FILED 11.30, 1014.

1,1 18,577, I Patented Nov. 24, 1914-.

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THE NORRIS PETERS CO PHOfO-LITHQ. WASHINGTON, D.

A. F. PETERS.

SAWING MACHINE.

APPLIOATION FILED APB.30, 1014.

Patented Nov. 24. 1914.

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U TED STATES PATENT OFFICE.

ALoNzo F. rn'rnns, or HERIOT BAY, VANCOUVER- IsLANp, BRITISH COLUMBIA,

CANADA. I

SAWING-IVIACHINEL I Application fired April so, 1914. Serial No. 8135,4431

To all whom it may concern:

Be it known that I, ALONZO F. Pn'rnns, a citizen of the Dominion of Canada, residing at Iileriot I Bay, Vancouver Island, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Sawing-Machines, of which the following is a specification.

This invention relates to atree felling and log bucking saw which has been particularly designed to be portable for convenience of transport in the bush. It belongs to that class wherein the power is derived from a motor of any approved class, but instead of the power of the motor being applied through a mechanism toreciprocate the saw it is used to directly operate air propellers, by the reaction of which the motor and the saw to which it is directly connected are reciprocated, reversal of the direction of movement being effected by reversing the angle of the propeller vanes.

The invention is particularly described in the following specification, reference being made to the drawings by which it is accompanied, in which:

-Figure 1 is a side elevation showing the application of the device in felling a tree.

Fig. Qis a plan of the same. Fig. 3 is an enlarged detail of the toe plate for attaching the engine support and its mechanism to the tree to be felled. Fig. 4 is an enlarged detail of the parallel traversing feed gear; Fig. 5 is an enlarged detail showing the manner of operating the feed. Figs. 6 and 7 are'enlarged details of the feed mechanism. Fig.8 is an enlarged detail of the supporting column. Fig. 9 is an enlarged detail. of the mechanism by which the angle of the vanes of the propellersis reversed. Fig. 10 is a detail of the adjustable stop of the vane reversing mechanism. Figs. 11 and 12 are enlarged details of the propeller vane hub showing the reversing mechanism therein.

In these drawings 2 represents an internal combustion engine of any approved design, or where circumstances are favorable, an electric motor. The engineis represented as larger than occasion may require. This engine is secured in a frame 3 which is endwiseslidable, see Figs. 1 and 9, on a bar 4, preferably square in cross section with the diagonals vertically and horizon tally disposed. The manner of supporting Specification of Letters Patent.

Patented Nov. 24,1914.

the slide bar -il: is different for felling the tree and sawing the tree or log and will be described later.

The engine frame 3 may be constructed in any convenient form and where an internal combustion engine is used, it will preferably be secured to the frame in a manner that the axles of its cylinders may be in either a vertical or a horizontal plane, that the oscillation due to any unbalanced pressure of the reciprocating pistons etc. may act in the plane of the saw blade or normal thereto in felling and sawing the tree or log.

The hubs of the air propellers 5 are secured on each end ofthe crank shaft 6 of the engine, and the saw 7 is directly connected to the engine frame 3 by an open frame 8 whichiscarried around the diameter of the swing of the propeller on that side. To this open frame 8 the saw is attached in any approved manner.

To enable the angle of the vanes of each propeller to be reversed to give the desired reciprocation to the saw 7, each blade, see Figs. 11 and 12, has a shouldered pin end 9 rotatably mounted in the hub 10 of the propeller, which is made in two halves jointed in a plane which is normal to the axis of the engine shaft 6 and coincident with that of the pin ends 9 of the propeller blades.

()n the inner end of each pin 9 is secured a pinion 11, in the teeth of which mesh those of a rack member 12, which is slidable in the hub 10 parallel to the axis of the shaft (3. one on the diametrically opposite side of the other, to engage an opposite side of the pinion 11 of each blade. These raclrmembers 12 are for each propeller secured in and project from the end of a sleeve 13 which is endwise movable on the engine shaft 6. In the groove 14 of this sleeve project from opposite sides the pins 15 of a lever 16, which lever is pivoted at 17 to the engine frame 3 and extends beyond that adjustably secureda stop 20, see Fig. 10,

having a headed pin 21. endwise movable in it parallel to the bar 1 against the resistance of a spring 22. The head of tlns pm 21. 1s

designedto engage the end of the lever 16 and move that lever to reverse the angle of the blades of the propellers 5 at the desired limit of the reciprocating movement re-' quired. r

The spring 22 is introduced to insure reversal of the propeller blades as the momentum of the engine, etc, might only turn the blades of the propellers half way, or into a plane normal to the axis of rotation and he therefore ineffective to reverse the movement of the engine frame. The stop member 20 is adjustable on the slide bar 4: by means of a handle 23 having grip operated detent lever 24: which engages notches 25 in the bar l.

This constitutes the essential feature of the invention: the air propeller operated mechanism whereby a reciprocating movement may be imparted to a saw.

It remains to describe the manner of feeding this mechanism to the tree or log which it is to be used in cutting, either in a substantially horizontal plane as when felling or in a substantially vertical plane, as when cross cutting. An elongated rectangular open frame 30, see Figs. 1 and 2, is secured to the tree to be felled by a projection 31 from the midlength of one of its longer sides. This projection is shaped like a spring board iron so that it may be entered into a notch cut into the tree similar to what is used to support a spring board. Rotatably mounted in this projection 31, see Fig. 3, is a nut 32 in which is threaded a screw 33 having a double hook at its lower end to receive the end of dogging chains 34. The dogs of these chains may be driven into the sides of the tree and by rotation of the nut may be tightened so as to strongly hold the rectangular frame 30 to the tree.

On each side of the rectangular aperture of the frame 30 rack teeth downwardly project from the underside, and slidably mounted within the rectangular aperture and bearing on the upper side of the frame is a member 36 having a toothed segmental are on the end opposite to that on which the tree is.

Rotatably mounted in bearings secured to the member 36, where it projects below the horizontal frame, is a shaft 37 having a pinion 38 on each end, the teeth of which mesh with those of the racks (/5 of the horizontal frame. This snaft and its pinions are rotated, see Fig. 4L, by a worm 89 on a shaft 40 rotatably mounted in the center of the member 36, the teeth of which worm mesh with those of a worm wheel 41 secured on the shaft 87 which carries the pinions 38.

The manner of rotating the shaft T0 to travel the member 36 along the horizontal frame will be described later.

Mounted on the shaft 40, or on a bearing upwardly projecting from the member 36, is an arm 43, see Fig. 1, at the end of which arm, see Fig. 6, is rotatably mounted a shaft 44: carrying a worm 42, the teeth of which attached parts move in the manner eX-' plained. The slide bar 4: may thus be moved radially about tie pivot shaft 40 to apply the saw 1n the horizontal plane of its move- -ment at an 1 desired angle. and that ivotal mounting 42 is endwise movable along the ho-i.zontal frame 30 by the racks and pinions before referred to.

'The feeding movement may be effected by hand by a'crank handle 47 on the end of the worm shaft -'-ll-, and on the other end of this shaft is secured a toothed wheel 48, see Fig. '?,'which teeth are engaged by a pawl l-S', which is pivoted on the upper side of pawl bar 50 in such a manner that the pawl be turned to engage the teeth of the ratchet wheel to rotate it in either direction. The pawl bar 50 is pivotally mounted at 51 to any convenient part of the frame 3 of the engine and is supported a short distance from the pivot on a rotatable pin 52 which, where the bar rests upon it, is flattened so that by turning the pin the bar may be lowered that its pawl will engage the teeth of the ratchet wheel or may be raised clear of such engagement.

' Secured on the upper end of the shaft 40 which forms the pivotal connection of the bar mount 43, and through which the traverse feed is operated, is a notched ratchet gear 55, see Fig. 5. Thisgear is rotated by a pawl 56 which is pivotally mounted at 57 on the upper side of the pawl bar 58 in a manner similar to what has just been described for the feed, and the pawl bar is pivotally mounted in the same manner to the engine frame and thrown in or out of action by a similar device. .80 constructed the reciprocation of the engine frame 2 on its slide bar 4 may be made to operate either the radial feed on the pivot 42 or the traversing feed of the member 36 along the horizontal frame 30, or both combined as occasion may require.

Where the saw is required for sawing the tree or log, the slide bar 4 is removed from the horizontal frame and that frame with its connected mechanism is laid aside. The bar a is mounted, see Fig. 8, in a clamp 60 which is pivotally mounted on a stud 61 laterally projecting from a member 62 within which is rotatable a nut 63 threaded upon the screwed end 64 of a column, the lower end of which is-pointed to penetrate the ground. This column is steadied by three lengthwise adjustable struts 66, the ends 67 of which are inwardlyturnedtoward the column and are flattened and spade-like that they may exercise a supporting hold of the ground. The struts 66 are pivoted to a sleeve 68 which is endwise movable on the column by means of a nut rotatable within it and fitting the thread of the column. The strut members are telescopically adjustable by screw threads that they may be applied to ground of irregular surface.

The slide bar i may be produced beyond the clamp 60 and pivotal connection 61, or may have A provision by which such extension may be obtained so that manual pressure may be applied to relieve or increase the pressure of the cut, or to receive acounterweight. a

It must be understood that the weight of the engine and its connected mechanism are during bucking supported entirely by the column 64 and the sawblade 7.

In use, the saw being applied to fell a tree, the engine 2 willmaintain a constant speed in one direction, and the necessary reciprocation will be effected by the reversal of the angle of the propeller vanes at each end of the stroke of the saw, which reversal is accomplished by engagement of the end of each lever 16 with the head of either stop pin 21., During this reciprocation of the engine the saw will be fed into the cut by either :the traversing feed operated by the pawl wheel 55 or the feed through the pawl wheel 48, as occasion may require, or the feed maybe applied by hand. In. either case the feed is not imposed upon the cut at one place but is yieldingly imposed on it throughout the forward and back stroke of the saw by the spring 45 interposed between the worm 42 and the bearing in which the worm shaft is supported,,which spring is operable whichever feed is being used. The supporting column construction illus trated in Fig. 8 may also be employed in connection with the parts shown in Fig. 1, when desired.

Having now particularly described my invention, I hereby declare that WhatI claim as new and desire to be protected in by Letters Patent, is:

1.In a portable cross cut saw, means for effecting the reciprocation of the saw blade by an air propeller.

A portable cross cut saw, comprising the combination with a slide bar pivotally frame the saw blade is suitably connected,

versing mechanism.

. 3.:A portable cross cut saw, comprising i the combination with a slide bar pivotally connected to a suitable support, a frame endwise movable on the slide bar towhich frame the saw blade is suitably connected, an air propeller rotatably mounted. in the frame the blades of which are susceptible of being angled to move the frame in either direction, mechanism on the frame to effect the reversal of the blades, means for rotating the propeller, and means at each 'end of the slideba'r for actuating the blade reversingmcchanism, said means comprising a stop member adjustably secured on each end of the slide bar, a plunger endwise movable in the stop member against the resistance of aspringthe head ofsaid plunger adapted to engage the blade reversing mechanism of the saw carrying frame.

l. A portable cross cut saw, comprising the combination with a slide bar pivotally connected to a suitable support, a frame endwise movable on the slide barto which frame the saw blade is suitably connected, an engine mounted on the frame, an air propeller at each end of the engine shaft the blades of which propellers are susceptible of being reversed to move the frame in either direction, mechanism rotatable with the engine shaft for effecting the reversal of 95 the blades, a lever pivotally mounted on the frame one end of said lever connected with the blade reversing mechanism and the other end projecting adjacent to the slideway, and

a stop member adiustably secured adjacent 100.

each end of the slide bar to yieldingly engage thelever of the blade reversing mechanism.

5. A portable cross cut saw, comprising a slide bar one end of which is pivotally mounted to a support, a frame endwise movable on the slide bar to which frame the cross cut saw is connected, an air propeller rotatably mounted on the frame theblades of which propeller are susceptible of being angled to either side, a mechanism connected to the frame by which the angle of the propeller blades may be reversed, and a stop adjustably secured to each end of the slide bar, said stop having a plunger endwise movable against the spring resistance to en-, gage the blade reversing mechanism and reverse the blades.

6. A portable cross cut saw, comprising a column screw adjusted supporting struts, a stud vertically adjustable on the column. a device pivotally mounted on the stud, a slide bar secured within the device, a frame endwise movable on the slide bar, means for securinga cross cut saw to the frame, air propellers rotatably mounted on the frame,

means forrotating said propellers, means for reversing the angle of the propeller blades, and means for operating the blade reversing mechanism from a stop adjust-1 0 ably secured adjacent each end of the guide bar.

7. A portable cross cut saw, comprising a horizontally disposed rectangular frame having means for securing it to the tree to be felled, a member slidablyo mounted to move lengthwise in the rectangular frame, said member having a segmental are at one end the edge of which is cut to receive the thread of a worm, a member pivotally mounted on the lengthwise slidable member said pivotally mounted member having a clamp for attachment to it of a slide hair on which the saw reciprocating engine is slidahly mounted said pivotally mounted member having also a worm and shaft rotatably mounted in it, that the worm may mesh with the segmental teethof the member on which it is mounted, a spring interposed between the worm and one of the hearings of its shaft, means for operating the worm shaft to feed the :pivotally mounted member, means for effecting the same by the reciprocation of the engine frame, and means for endwise moving the pivot carrying member along the horizontal frame, said means cooperative with the reeiprocation of the engine frame.

In testimony whereof I affix my signature in presence ,of two witnesses. ALONZO F. PETERS. Witnesses:

ROWLAND BRITTAIN, MAY NVHYTE.

Copies of this patent may he obtained for five cents each, by addressing the Wommiesioner of Patents.

Washington, D. 0.

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