US909454A - Automatic wood-saw. - Google Patents

Description

I I a T. P. PYE. AUTOMATIC WOOD SAW. APPLICATION FILED we. 24, 1907.

Patented Jan. 12, 1909.

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T. P. PYE.

AUTOMATIC WOOD SAW.

APPLICATION FILED DEC. 24, 1907. 909,454.

- Patented Jan. 12, 1909.

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Patented Jan. 12, 1909.

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THOMAS P. PYE, OF EVERETT, WASHINGTON.

AUTOMATIQ 'WO0l3-E3AW.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed December 24, 1907. Serial No. 407,947.

T 0 all whom it may concern:

l 3e it known that I, THOMAS P. Pris, a c tlzen of the United States, residing at Everett, in the county of Snohomish and State of ashington, have invented a new and useful Automatic Wood-Saw, of which the following is a specification.

Thisinvention has reference to improvements in automatic wood saws, and its obect is to provide a means for cutting wood into predetermined lengths.

The invention is designed more partied.

larly for the cutting of'logs or cord wood into any desired length, or for the cutting of other wood into definite lengths. i

The invention is designed to be used, though not necessarily confined to use, in connection with a circular saw mounted to be moved to pass the end of a conveyer upon which is carried a log or logs, or other form of wood, to be cut into shorter lengths, either for use in stoves or such lengths that may be split into kindling wood, or for any other purpose.

The present invent-ion is more particularly directed to means wherebythe log or stick, which is advanced for a predetermined distance, is then tightly clamped in .place while being cut, as will be best understood by reference to the following detailed taken inconnection with the description,

part of accompanying drawings, forming this specificatlon, 1n wh1ch,

Figure 1- 1s a plan view of the machine.

Fig. 2 is a side elevation thereof. Fig. 3

- is an elevation at the saw end of the mais a power shaft 3 of power,

shafts 5, 6, parallel with Upon the shaft 5 is a belt pulley 7, and

chine, and Figs. 4c and 5 are detail views.

Referring to thedrawings there is shown a frame 1 of suitable shape to support the various parts of the structure. Mounted in suitable journal bearings 2,0n the frame to which is secured near one end a pulley 4: for the application of power through the intermediary of a belt coming from a suitable source. the belt nor the prime mover is shown, but it will be understood that any suitable source such as a steam engine, explosive engine, electric motor, or windmill may be used. Mounted upon the framework 1 in other suitable journal boxes 2 are two other the drive shaft 3.

Neither upon the shaft 3 is a smaller belt. pulley S coupled-to the pulley 7 by means of a suitable belt 9 indicated in dotted lines, the parts being proportioned so that the shaft will rotate at a slower speed than the shaft Fastened upon the shaft at the end remote from that carrying the pulley 7 there is a friction wheel 10 engaging a larger friction wheel 11 on the shaft 6, so that the last-named shaft receives motion from the shaft 5, but will rotate at a slower speech The shaft 6 extends at one end beyontlthe. frame 1 and there carries a beveled pinion meshing with'a beveled pinion 16 on a horizontal shaft 17 extending along the side of the frame at right angles to the direction of the shafts 3, 5 and 6, and this shaft is supported in suitable journal bearings 18 fast on the frame 1, the end of the shaftl? remote from the bevel pinion 16 carrying a disk 19 from the face of which projects a pin 20 in the form of a roller mounted on a stud. Adjacent to the frame 1 is another frame 21 upon which is mounted a belt carrier 22 provided at suitable points with cross slats which may be made of iron or other metal strips suitably shaped for the purpose, and at its ends with sprocket chains 24 supported by sprocket wheels 25 mounted on shafts of which the end shaft 26 only is shown, and this shaft has journal bearings 27 in the frame 21. The shaft 26 extends beyond one side of the frame 21 toward the frame 1 andthere carries a sprocket-wheel 28 connected to another sprocket wheel 29 on a shaft 30 by a suitable sprocket chain 13, and on the shaft 30 there is secured a starwheel composed of a hub 31 carrying a number of equally disposed radial arms 32 in the path of the pin 20 of the disk 19, as best shown in Fig. 5. Of course any other suitable means for transmitting motion to the main frame on each side of the wheel 33 are the two ends of the side bars of the frame 35,

the pivot points being indicated at 36; the

other ends of the frame 35 are provided with journal bearings 37 for a saw arbor 38. There is a circular saw 39 mounted upon this aroor at one side of the frame 25, and at an intermediate point the saw arbor carries a belt pulley 40 connected to the belt wheel or pulley 33 by a suitable belt 41, indicated in dotted lines.

Straddling the belt wheel33are two arms 42, 42, each connected at one end to the side bars of the frame 45 between the pivot 36 and the saw arbor. These two arms are ultlmately oined, as shown at 43. Mounted upon the shaft 6 is a cam 44 arranged to engage a roller 45 carried by a bar 46, the upper end of which is pivotally connected to the end 43 of the lever, just described. The lower end of thebar 46 is slotted longitudinally, as shown at 47, to straddle the shaft 6. On the shaft 6 there is another cam like the cam 44 and another upri ht bar 48 like the bar 46. The upper end 0 the bar. 48 is pivotally connected, as indicated at 49, to one end of a lever 50 fulcrumed in a post 51 rislng from one of the cross beams 34 of the.

main frame. Attached to the further end of the lever 50 is a spring arm 52' which may be made up of a number of superposed leaf springs, as'indicated, and at its free. end the spring arm 52 carries a yoke 53 at about the center point thereof, and this yoke is in the "shape of a bow having its ends joined by a cham '54, or other suitable strand. The lever 50 and spring arm 52 are of such length and so located that the chain or strand 54 is located over the delivery end of the conve er 22.

ow,'let it be assumed that power is applied to the pulley 4 in any suitable manner,

and thatthe parts are properly timed in operation, and, assumingthat one or more logs of wood, or at least wood in a form adapted to be divided up into smaller sizes, is placed upon the conveyer 22, then the operation of tliencetot one'quarterof a revolution and thereby advancmgthe'conveyer 22 a certain predetermined distance, which'distance will equal the length into which'the logs or other wood are to be out. As soon as the log 11% been advanced and the conveyer has come to rest, the cam actuating the lever 50 becomes active and the arm 52 is lo ered until the chain 54 clamps the log or sick down upon the conveyer. As soon as this occursfthe cam actuatingthe arm 42, 43becomes active to raise the end connected with the bar 46, thus moving-the sawl frame 35 around its pivots 36 in the direction to depress the saw and force it through the wood of the log or stick until the desired piece is severed therefrom. Now, the cam 44 rides'fromunder the roller 45, thus releasing the bar 46, and the saw immediately rises to its normal position, which is an elevated position, out of the path of the logs or sticks on the conveyer. It will be observed that the pivot points of the frame 35 are to one side of the shaft 3, and nearer to the arbor 38 than. is the shaft 3. The result of this is that when the frame 35 is depressed, the belt 41 is put under ten sional strain, thus tightening the belt, when the saw is called upon, to do -work,'so that when the saw is elevated, or when the whole structure is at rest, this belt need not be under any particular strain. Not only is the life of the belt 41 thereby increased, but the tendency of the belt is to maintain the saw frame in the elevated position and to return it thereto when the saw is depressed In order that the return of the saw to its nor;

mal elevated position may be assured, the: arm 43 is contmuedback of the upright 46,

as indicated at 55, and has there app ied to it a counterweight 56 which may. be made adjustable by means of a screw 57.

As soon as the saw has finished its work I and has returned to its normal position, the pin 20, which during the operation described has continued to move about the axis of the shaft 17, again comes in contact with an arm 32, and the conveyeris advanced another step. But, in the meantime, the cam controlling the lever 50 has permitted the latter to ,rise, so. as to carry the chain 54 out of contact with the log or stick. As soon as the log has been again, advanced, it is again clamped by the cham 54, and the saw is'again lowered. Thusthe cycle of operation is continuous, so long as power is ap plied to the pulley 4 and logs or sticks of wood are placed upon the conveyer 22.

The action of the entire machine is .auto- I matic, and the only attention required is the placing of the lo 's or sticks upon the con-.

veyer. Thus, cor wood or longer pieces of wood in the form of logs may be readily cut up into stove lengths or 'into lengths adapted to be again divided into kindling wood,

or other forms of wood may be readily divided' into such lengths as may be desired.

By suitably proportioning the sprockets 28 and 29, the extent of travel of thecon- 7 veyer 22 under each impulse of the pin 20 may be regulated so that the lengths of the blocks into which the sticks or'logs are cut may be determined.

The cam acting on the lever 50 is not 1 identical with,'though like the cam 44, since it must be proportioned and timed in'operation to move the lever 50 in proper time relation to the saw-operating means. To facili tate the return of the, lever 50 to normal position an adjustable counterweight 14: is 'provided.

I claim 1. In a Wood sawing machine, a conveyer, and a clamp 'coacting therewith, said clamp having a memberforengaging the wood consisting of a spring bow, and a flexible strand connecting the ends of the how.

2. In a wood sawing machine, a conveyer,

and aclamp coasting therewith, said clamp having a member for engaging the wood consisting of a [spring bow, and a chain connecting the ends of the how.

same and a lever carrying the spring arm, and means for-moving the lever about 1ts' pivot to bring the clampingheadinto and out of operative relation to the conveyer.

- 5.- In a wood sawing machine, a conveyer,

- a vclamp coasting therewith comprising a olampmg head, a spring arm' carry1ng said he's and a pivoted lever carrying the sprmg' I as my own, I

arm, a counterweight for the lever at the end remote from the spring arm, and means for positively moving the lever against the action of the counterweight to bring the clamping head into operative relation with t the oonv'eye'r.

6. In a wood sawing machine, a conveyer,

a clamp coacting therewith having a clamp-;

ing head comprising a spring bow and a flexible strand connecting the ends of bow, a springthe arm carrying the clamping head, a pivoted lever carrying the spr ng arm, and means for operating the lever) '7. In a wood sawing machine, a oonveyer, a clamp coacting there'with and comprising a spring arm carrying a spring bow and a flexible strand connecting the ends of the bow, a pivotedlever carrying the'spring-r arm, a counterweight. on sa d leverat. the

end remote from the. clamping head, and means for positively movin direction opposed to the action of the counterweight. I In testimony that I' claim the foregoing have hereto affixed my signature in the presence of two witnesses.

THOMAS P. Pris. VVitnesses I C. M. CRAWFORD, S; EnMUNDs.

the lever in a

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