US1499198A - Log saw - Google Patents

Description

June 24 1924- J. A. SWENSON LOG SAW 3 Sheets-Sheet 1 June 24 1924.

J. A. SWENSON v LOG sAw Filed Nov. l. 1.921 3 Sheets-Sheet, 2

June 24., 1.924..- 1,499,198

J. A. SWENSON -LOG SAW Filed Nov. 1 1921 s sheets-sheen 15 N r1 A' :Jn/manioc Patented June 24, 1924.

J'NAS A. SWENSON, OF SPRINGFIELD, SOUTH DAKOTA. A

me SAW.v

'Application mea Nbvember 1, 192i. serial No. 512,035.

To all whom t may concern: i

Be it known that JoNAsA. SwENsoN, a

citizen of the United States of America, re-

siding at Springfield, in the county of Bonhomme and State of South Dakota, has

, invented new and useful Improvements in lLog Saws, of which the following, is aspecification.

The object of the invention is to provide a relatively simple and eflicient sawing ma` A, chine especially designed for lumbering purposes and adapted for. cutting down or` felling timber and reducing ythejsame to commercial or portable form; and with this object in view the invention `consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a side view of a machine embodying the invention arranged for use vin cutting up felledtimber.

Figure 2 is a similar View showing the machine arranged for use in cutting rela` tively small logs into portable lengths.

Figure 3 is a similar ,View showing the parts arranged for felling timber. y,

Figure 4 is a plan view of the vmechanism as shown in Figure 3. y l

Figure 5 is a front end viewof the machine. i Figure 6 is a detail view in perspective of the independent saw guide used in felling timber. i y. f

Figure 7 is a view of'one ofjthefmachine carried saw guides or hangers. t

Figure 8 is a view of theretainerby which the jack lsection of the frame is heldv in its operative position. y y The frame 10 of the machine which oonsists essentially of substantially parallel side beams is supported at its rear end by ground wheels 11 normally mounted upon the' spindle portions of a transversey axle l2 but adapted for selective mountingupon alter,- native spindles-13 carried by a yoke 14 when,

\ as shown inl Figure l in full lines the machine is adapted for'use in cutting logsL of large diameter which are resting on the ground, as a means of minimizingthe longitudinal vibration of the frame of which the forward end in that use of-the device issupported by the log to which it may be an-` chored by spikes 15 driven through `suitable eyes 16. f

Th'eframe adjacentto its",rearfend` and thereforeabove the supportfadvorded by the ground wheels carries amotor 17 of the'lexplosive or other preferred type for actuat-` ing. a drive shaft, 18 illustrated n as ofthe cranked type and carrying ily wheelsy 19 and Va belt pulley 20 traversed by'a belt`21 which also extends around ya drive pulley Y22 hav-l ing a crank pin 23 operating in the slot 24 of anoscillatory saw. Aactuating. arn`f1 25.`

This saw actuating arm is pivoted as.at .26V upon a suitable vupright frame 27 supported by the main frame of the machine and is'connected at its lower end, for example by a clipv 28` or its equivalent with a saw carrier 29 give adapted for reciprocatoryy movement to a corresponding motion to the saw bladevv 30;

In the construction and*` arrangement ofthe parts illustrated in Figure 1the saw blade;V Si

is rigidly attachedcby means of bolts 31 to the saw carrierywhich yoperates in av guide hanger 32 depending from the main frame,

and the necessary downward pressuretojini-4 duce an edective feeding of thesaw through'A the log "indicated at 33 is supplied by'k 'a ten-` sioned feeding device consisting forheirample of ya spring 34 andvchainj35 connectingpthe heel 36y of the saw carrier with theupper' end of the ysaw actuating arm 25. Obviously any desired tension may be applied tothe: spring to effect the desired feeding' pressure;

Inlconnection 'withthe beltj21 there is arranged aitightener 37 consisting'of anarmf oa'rrying'a roller 38 and movable by means of a hand lever 39 operatingjin relation ltoa toothedseg'ment 40.

`When as illustrated in Figures Sand the machine is to be used as a meansfor cut'- tingdown or felling standing tin'iber the:

saw blade 30`isf turned to operate in a hori-J zontal instead ofa vertical plane and isconl" nected with the carrier by meansfof an eX- tensionbari41ldesigned to dispose the blade beyond the frontend ofthe frame, andin this posit-ion of the partsthe extension bar is carriedl through a 1guide 42 forming a part of a hanger 43 depending froml the main frame of the machine and also through a' supplemental guide 44 whichis adapted to beanchored by meansof stakes orpins y45 tothe ground in advanceofthe machine frame, while feedingymovement is imparted to the saw by means of a chain 46 anchored to the ground by a'stake 47 ory its equivalent and a spring 48 connected with the fonward ,y

, end of the extension bar 41 as shown clearly in Figure 4.o The guide 42 andfhanger43 are removed when ,the ymachine isnot er1-h Y carrying a roller 60 gagedin felling timber. A plate 49 is employed as the connection between the rear end of the extension bar and the carrier, and said extension bar is furtherpivoted as 'at 50 to said plate to permit of lateral or horizontal swinging movement as the saw is fed through the stock or trunk of the standing timber as indicated at 51.

order that the machine may also be adapted 'for use in 'cutting up lighter timber such 'as the limbs. of trees which cannot be )p'e'rated Vupon. "conveniently whileV lying` fthe ground, the side beams ofthe main frame of the. machine Aare 'provided Ywith a jack etensio'n 52 shown `inFigures l, 3 and 4in norinal Yposition in alignment with the bodyport-ions of said beams hinged thereto alsfindic'ated at 53ft'o adapt them to be swung toannpright o'r 'supportingposition as indi'catefd Yin gFig'ure '2. In the adjusted Apositin the jack extension is held by a brace rod 5 4:l 'provided at vits eitremity with a hook 55 for'engaging 'a ltransverse rod or pin 56.

` .order thatthe saw blade when the machine is'u'sed-forV sawing comparatively light logs orfbranches maybe held in the elevated position in the Yintervals between the arrangement ofthe logs in position for cutting there is. employed aretainer Vor lifter 57 consistingfofa rocker mounted as at 56 on the main frameandfprovided with an arm 59 i of rubber or other yielding'material for engagement by the' toothed edge of the sawblade and Apermanently arranged 'in the .path thereof. The rocker is of. bell-crank form with ythe upper vor. operatarm 61 connected by a rod 62 to the hand lever3'9 which as hereinbefore described operates in connectionwith theV segment 40, having a-'suitable latchy for'engaging'the toothed Apieriphery thereof, a-nd carrying the belt ti'ghtener 37 by which the .operation of the saw orthe starting and stopping Vof the saw operatingmeans are effected. Obviously7 when the'lever 39 is moved to the rear to loosen the (drive belt 21 the pulley by which c moti'nis communicated'thereto and which is actuatedv by the motor will turn loos-ely therein, whereas upon moving the lever forwardand locking it in position with the belt under tension, motion will be communicated to the saw blade carrier.

vBy attaching the Vsaw blade lifter Vconsisting vas above described of the rocker and bladefsuppGrting roller 6() to the starting lever 39 itwill be obvious that whenthe lever is moved to 'start the machine by applying tension to the drive belt the blade supportingroller 'will be lowered as indicated in Figure 2 and thereby removed from contactV with'the toothed edge of the saw al-v though arranged in the path thereof, whereas when the starting lever is moved in -the opposite direction to stop thesaw the rocker will beactuate'd'to raise the "roller 60 and thereby lift the saw to the dotted line position indicated in Figure 2. The lower end of the jack member is preferably provided with a suitable metallic shoe 65 and a log rest 66 is arranged near the upper end thereof for supporting logs as indicated at 67 in position for cutting by the sawwhen lowered from the dotted linel positionindicated in Figure 2 through the starting movement of the lever 39. When the saw blade has passed through thel log it will be caught bythe roller 60 and hence prevented from coming in contact with the ground or 'other objects which might injure the cutting edge thereof during the interval between the severance of the log and the stopping of the saw by the reverse operation of the starting lever 39. When the latch of the'leve'r 39V is disengaged from the segment to relieve the tension on'the drive belt the spring 63 which issupplemented by the chain 64 to form a connection 'with 'the lever 39 serves to yieldingly hold the latter into position to support the saw in the dotted line position indicated in Figure 2. VSince it is necessary onlyin the sawing of small timber, such as that illustrated at 67, to catch the saw blade after Vit has completed a Ycut and raiseit tol bearing straps 58 in which the rocker -58de mounted and in which Vthe rocker may beV moved longitudinally, the bearing-straps 58 being secured to the frame 10 on the top thereof.

When the j ack extension 52 is arranged in alignment with the frame, as in Figure l, it is designed to be held in such position by'A spring latch plates 52 adapted for engagement with pins 52'r1 mounted on the side bars of the frame. Y

Moreover in starting the saw Vboth o Y logs supported by the jack member. as shown in Figure 2 or upon the ground as indicated in Figure l, a movable saw guide 68 lmay be employed, the same consisting of a suitable arm pivoted at 69 and carrying a kerfed or grooved head or block 7() to straddle the rear edge or back of the saw as shown in Figure 2. This guide prevents chatteringrof the saw blade as the cutting is started, but after the saw has penetrated the log to any considerable extent it will be guided thereby independently of the block 7 O'which may then dropY free as indicated in Figure l. Y

From the foregoing description it will be 1. A sawing machine having a motor carn rying frame provided with rear supporting wheels and having its forward end provided with a jack member adapted for angular position with reference to the frame to support the latter at the forward end or extension into the same plane as the frame to support the frame when the jack member is rested on top of a felled log, a saw carrier mounted for reciprocating movement in longitudinal relation with the frame, and means for communicating motion to the carrier.

2. A sawing machine having a motor car-` rying frame provided with rear supporting wheels and having its forward end provided with a jack member` adapted vfor angular position with reference to the frame to support the latter at the forward end or eXtension into the same plane as the frame to support the frame when the jack member is rested on top of a felled log, a saw carrier mounted for reciprocating movement in longitudinal relation with the frame, means for communicating motion to the carrier, the jack member consisting of a hinge extension of the frame, and means for securing the jack member either in angular relation or in aligned relation with the frame.

3, A sawing machine having a motor carrying frame provided with supporting wheels at its rear end, a jack member supporting the frame at the forward end, a saw carrier mounted for reciprocatory movement in longitudinal relation with the frame, means for communicating motion to the carrier, the jack member having means for supporting a log to be cut, a bell crank retainer mounted on the main frame and provided with a yielding roller for disposition below the cutting edge of a saw mounted in the carrier, and means for actuating said retainer.

4. A sawing machine having a motor carrying frame provided with supporting wheels at its rear end, a jack member supporting the fra-me at the forward end, a saw carrier mounted for reciprocatory movement in longitudinal relation with the` frame, means for communicating motion to the carrier, the Jack member having means for supporting a log to be cut, a bell crank retainer mounted on the main frame and provided with a yielding roller for disposition below the cutting edge of a saw mounted in the carrier, and means for actuating said retainer, said retainer being laterally movable out of obstructing relation with the saw.

- 5. yA sawing machine having amotor carrying frame provided at its front end with a jack member having a log rest, a saw carrier mounted for reciprocatory movement in longitudinal relation with the `frame and carrying a saw blade for movement in a path transverse to the log supporting/means for communicating reciprocatory movement to the saw carrier including driving and driven pulleys and a belt connecting the same, a starting lever carrying :i belt tightener for applying tension to the belt, and a c saw blade lifter having a rocker provided with a saw support arranged in the path of the'cutting edge ofthe saw blade and operatively connected with said starting lever.

6. A sawing machine having a motor carrying frame provided at its front end with a jack member having a logrest, a saw carrier mounted for reciprocatory movement in longitudinal relation with the frame and carrying a saw blade for movement in a path transverse to the log supporting means for communicating reciprocatory movement to the saw carrier including driving' and driven pulleys and a belt connecting the same, a starting lever carrying a belt tightener for applying tension to the belt, and a saw blade lifter having a rocker provided with a saw support arranged in the path of the cutting edge of the saw blade and operatively connected with said starting lever, the saw blade being yieldingly fed in the directio-n of its cutting movement. f 7. A sawing machine having a motor carrying' frame provided at its front end with a jack member having a log rest, a saw cai'- rier mounted for reciprocatory movement in longitudinal relation with the frame and carrying a saw blade for movement in a path transverse to the log supporting means for communicating reciprocatory movement to the saw carrier including driving and driven pulleys and a belt connecting the same, a starting lever carrying a belt tightener for applying tension to the belt, and a saw blade lifter having a rocker provided with a saw support arranged in the path of the cuttingedge of the saw blade and operatively connected with said starting lever, the saw blade being yieldingly fed in the direction of its cutting movement, and the starting lever having a spring connection for moving the same in the belt loosening 'jack member having a log rest, a saw carrier mounted forv reciprocatory movement in longitudinal relation with the frame and carrying a saw blade for movement in a for communicating reciprocatory movement tothe saw carrier including driving and driven pulleys and a belt connecting the kpath transverse to the log supporting means tion of its ci'itting movement, and the sart- Y ingl lever having a spring connection for movin rthe saine in the belt loosening direction', Jfie tension oi tlie last named Connection being in excess of that of the sa i feeding means.

9. A sawing maeliine having a motor carrying 'frame provided at its Jiront end with a )aok member aing a log rest, a saw carrier mounted for 'ieciprocatory movement in longitudinal relation with 'the frame 'and carrying a. sawblade for movement in a pali transverse o the log supporting means for communicating reciproeatory movement to the saw Vcarrier including driving and driven pulleys andra belt connecting the same, a starting lever cairying a belt tiglifsener for applying tension to the belt, and a saw blade lifter having a roeker provided Witli" a sawfsupport arranged in the path of tlie cutting'- edge' oiftlie saw blade and operatively conneoed Willi said starting4 lever, the saw support consisting of a soft surfaced roller.

ln testimony Wliereof he alixes lns signature, Y

' JONAS A. SWENSGN;

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