US741174A

US741174A - Drag-sawing machine.

Info

Publication number: US741174A
Authority: US
Inventors: David Joseph Shea
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-11-28
Filing date: 1902-11-28
Publication date: 1903-10-13
Anticipated expiration: 1920-10-13

Description

' No. 741,174. 1 PATBNTED 00T. 13, 190sr D. J. 'SHBALH DRAG SAWING MACHINE.

APBLI011TIQN FILED ,NOATM 2.8yh 1902.

1H: mams PETERS co, Pnomurna. wAsmun'roN. nA c.

No. 741,174.'- PATENTED 00T. 13, 1903@- D. J. SHEA. f

DRAG SAWING MACHINE.

APPLIOATION FILED NOV. 2B, 1902.

4 SHEETS-SHEET 2.

Hf: L, A A, I -...M..,.{A7 `N1 ,ylmgeys Tm; :mums PETERS co.. rnooumo., wAsnmcroN, o. c..

310.741,174. l' PATENTDD 00T.1a,19n3.

D. J. SHEA.

DRAG SAWING MMHIINE. APPLIGATION FILED N ov: 2a, 1902.4 'No MODEL. 4 SHEETS-SHEET a.

No. 741,174. Y PATENTED 0G'.r.1s,19o73.`

D. J. SHEA. DRAG SAWING MACHINE.

APPLIGATION FILED NO'V. 28, 1902. .N0 MODEL.

4 SHEETS-SHEET '4.

in: Nonms PETERS co. PnoYoLxTno.. wnsmnm'ow. n. c.

Patented october 1s, 190e.

nrnnir rrrcn.

DAVID JOSEPH SHEA, OF MARIANNA, ARKANSAS.

SIEECIFICATI'ON forming' part of Letters Patent N o. 741,174, dated October 13, 1903.

Application tiled November 28, 1902. Serial No. 133.124. (No model.)

To all whom t may concern:

Be it known that I, DAVID JOSEPH SHEA, a citizen of the United States, residing at Marianna, in the county of Lee and State of Arkansas, have invented a new and usefulDrag- Sawing Machine, of which the following is a specification.

The invention relates to certain improvements in drag-sawing machines, and has for its principal object to construct an improved form of sawing-machine which may be readily transported from place to place and quickly adjusted in any desired position.

A further object of the invention is to provide an improved form oi' saw-reciprocating mechanism by which the movements of the operating-lever be transmitted to the saw with but slight frictional resistance, to provide for the adjustment of the operating mechanism to suit the operator, to take up slack of the connecting belts or straps, and to provide for the gradual checking` ofthe movement in one direction and the imparting of an initial impulse at the starting of a movement of the saw in the opposite direction.

A still further object of theinvention is to provide for the mounting of the saw and its operating mechanism on a rocking frame which will automatically follow the saw during the gradual deepening of the saw-korf and to provide suitable counterbalancing means for resisting movement of the frame under the strain exerted on the operating-lever.

A still further object of the invention is to provide for the adjustment of the vertical height of the rocking frame in accordance with the character of the work.

The invention further contemplates the transposition of the several operating members as may be desired by the operator and the employment of an operator-seat adjustable both from side to side of the machine and toward and from the operating-lever.

A still further object of the invention is to provide an adjustable overhanging guard disposed at the front ot the machine and forming a guide for the saw-blade in any position of adjustment of the latter, the guard being further adj nstable to inoperative position While the machine is being transported from place to place. y

A still further object of the invention is to provide means under the control of the operator for varying the angular position of the saw and for moving said saw to an upright or inoperative position when the machine is to-be moved.

A still further object of the invention is to facilitate transportation of the machine by providing the main frame with supporting Wheels or rollers and adjustable handles.

With these and other objects in view the invention consists in the novel construction and arrangement of parts hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions,size, and minor details of the structure may be made without departing from the spirit or sacricing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a perspective view of a drag-sawing machine constructed in accordance with the invention. Figy2 is a longitudinal sectional elevation, the overhanging front guard being omitted. Fig. 3 is a transverse sectional elevation of the machine on the line 3 3 of Fig. 2 and drawn to a somewhat larger scale. Fig. 4t is a longitudinal sectional elevation of a portion of the machine on the line 4. 4 of Fig. 3. Fig. 5 is an elevation of a portion of the front or saw end of the machine. Fig. 6 is a sectional elevation, on an enlarged scale, of the outer saw-guide.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The base of the machine comprises a pair oflongitudinally-disposed stringerslO,unit`ed at a point intermediate of their ends with a transverse bar or plate 11, the frame being strengthened by longitudinally-disposed tensionbars 13 passing under the bar or plate 11 and secured to the opposite ends of the stringere. The rear ends of the stringere are further connected bya transverse har l2, and the whole constitntesa frame ou which the various movable members of the machine are supported. At the front end of each Stringer is a supporting-wheel 13, having a suitable spindle or axle adapted to bearings in the stringer, and at the rear end are handle-bars IOO 14, guided in straps to permit their adjustment to operative and inoperative positions, the bars being held in the inoperative position shown in Fig. 1 by suitable lockingsprings 16 when the machine is in operation. When the machine is to be moved, the locking-springs are raised from the depressions or recesses in the handle-bars and the latter are drawn out in convenient position to be grasped bythe workmen. Each stringer carries a number of

vertical standards

17, 18, and 19, the

standards

18 and 19 being spaced from each other to form a vertical slot for the passage of the opposite ends of a transverse p plate is closed.

l said slots.

, 20 will be moved either toward or from thel Vshaft 20 is supported.

shaft 20, on which the rocking frame of the machine is mounted, and the standard 17 being spaced from the

standards

18 and 19 in order to form a vertical guide for a lever 2l, there being one of such levers at each side of the machine and each lever being provided with a slot 22, in which the end of the The three standard members are held in proper position by a cap-plate 23, hinged to the top of the outer member 17 and having depending tianges 24 embracing the inner sides and ends of the opposite members, the cap-plate being further provided With a depending block 25 in order to prevent movement of the standards inwardly. In order to lock the capplate in position, the two

standards

18 and 19 are provided with headed pins 26,projecting through suitable openings in the cap-piece and engaged by a locking device 27, carried by the cap-plate, the locking device being preferably in the form of a spring which will automatically engage the pins when the cap- The front ends of the levers 21 are fulcrumed on pins 29, carried by brackets 30, which extend over the supportingwheels 13, and said levers are adjustable in order to raise and lower the shaft 20 and the rocking frame carried thereby. The rear faces of the

standards

17 and 19 are provided with a plurality of notches 31, adapted to receive a locking-bolt in the form of a crossbar 32, guided in a slotted portion of the lever 21 and laterally extended to engage in The cross-bar 32 is connected by a rod 33 to a handle 34 at the end of the lever and is normally held in locking position by a tension-spring 35. The construction is such as to permit vertical adjustment of the shaft 20 by rst releasing the locking-bar 32 and then raising or lowering the levers 21 until the locking-bar is engaged in another notch, and during this movement the shaft fulcrum of the lever in the guiding-slot 22.

The rocking frame comprises two pairs of longitudinally-disposed parallel upper and

lower stringers

37 and 38, connected at intervals by

vertical posts

39, 40, and 41 and transverse bars 42 and 43, while at the front end of the frame the structure is strengthened by atransversely-extending head-block 44, atransverse` front plate 45, and a plurality of struts 46, while additional braces and strengthening-bars may be employed in order to make the structure perfectly rigid. The shaft 20 extends transversely of the rocking frame at a point about midway between the opposite ends of said frame and is held in proper position by an elongated bearing-block 48, which also serves to strengthen the frame by connecting the lower stringers 38. At a point near the rear end of the rocking frame the structure is further strengthened by an additional cross-bar 49, extending under and connected to the lower sides of the stringers 38.

The 'stringers 38 are spaced for the reception of a saw-carrier in the form of an elongated rectangular bar 50, and the adjacent faces of said stringers are slotted for their entire length, as indicated at 51, for the reception of antifriction-rollers 52, mounted on studs projecting from the opposite sides of the saw-carrying bar. The antifriction-rollers are preferably arranged at points near the opposite ends of the bar; but additional rollers may be placed at intermediate points, if desired. To further reduce frictional resistance to the movement of the saw-carrier, the latter is provided with upper and lower pairs of antifriction-rollers 53, bearing against the adjacent sides of the Stringer at points above and below the slots 51. The saw-carrier is provided at its front end with suitable means for the support of a cross-cut or other saw; but before describing this connection attention is directed to the mechanism for imparting reciprocating movement to the saw-carrier.

In the upper stringers 37 are journal-bear'- ings for the support of a transversely-disposed shaft 55, having at a point between the stringers a rectangular or polygonal portion to which is secured a wheel 56, comprisingacentral spoke 58 and a pair of outer parallel spokes 59, these spokes crossing each other at right angles and extending for the full diameter of the Wheel, the outer ends of the spokes being secured to a suitable rim 60.

The spaced spoke members 59 are provided with small spindles 61, the latter being preferably in the form of headed bolts extending through alining openings in the spoke members and the bolts being,r held from longitudinal displacement by pivoted cap-pieces 63, which are held in place against the headed ends of the bolts by suitable springs 64. To remove` the bolts or spindles, it is merely necessary to force the cap-pieces back against the action of the springs until the headed ends of the bolts are exposed.

On each of the bolt-like spindlesis mounted a disk 65, having an annular series of openings 66, which may be brought into alinement with similar openings in the spoke members, a suitable locking-pin 67 being passed through the alining openings in order to lock the disks in any desired position of circumferential adjustment. To the periphery of each disk is secured one end of a strap or belt 68, which passes ont through an opening in the wheel-rim and after partly encircling the rim is connected to one end of the saw-carrier, the belts or straps crossing each other, so that an oscillating movement ofthe wheel 56 will impart a horizontal reciprocating movement through the saw-carrier. The belt or strap connections are such that by turning the disks 65 the belts or Vstraps may be adjusted to take up slack.

The shaft or axle 55 is extended laterally beyond the two upper stringers, and on one end is secured a gear-wheel 70, comprising a pair of plates 71, spaced by a block '72 and provided with a plurality of transversely-extending pins 73, on which are mounted antifriction-rollers 74, constituting an antifriction-gear, and intermeshing with these rollers is a gear-segment '75, formed at one end of a lever 76, which is pivoted on a pin 77, the latter being'supported at one end by the vertical bar 41 and at the opposite end by an upright 78, extending between the lower stringer 38 and the cross-bar 43.

To one of the stringers 38 is secured a U- shaped bracket SO, having a plurality of transversely-alining openings for the reception of a pivot-pin 81, on which is mounted one end of an operating-lever 82, the openings affording a considerable range of adjustment of the fulcrum-point of the lever. The operating-lever is connected to the segment-carrying lever by a pair of links 83, and in both of these levers are formed a number of openings for convenience in adjusting the links to alter the scope and the power required for operation. The operating-lever is formed in two sections, the main section being provided at its outer end with a pair of segmental plates 84, between whichl is pivoted the inner end of the handle-section 86, and said handle-section is slotted for the reception of a locking-bolt 87, held in engage'- ment with any one of a series of lockingnotches 8S in the plates Se by means of a spring 89. To one end of the spring is secured a handle 90, which may be operated to release the locking-bolt and permit the adjustment of the handle portion 86 of the lever to any desired annular position most convenient for the operator.

It will be observed that the transverse crossbar 43 is extended on both sides of the upper stringere, and the construction is such as to permit of the changing of all of the operating mechanism to the opposite side of the machine, the standard 78 being removed and secured in position between the opposite lower stringer 38 and the overhanging end of the bar 43 and the gear and segment and operating-lever being arranged in proper position should it be desired to operate the machine from the opposite side. The workman swings the operating-lever up and down in a vertical line and transmits an oscillating movement to the belt or strap carrying wheel 56, and in order to gradually check the movement of the wheel at the end ot' each stroke and to impart an initial impetus at the beginning of each stroke I employ a leaf-spring 92, having its central portion secured to one of the upper stringers and its opposite ends projecting into the path of movement of a lug or pin 93, extending from one side of the wheel, so that as the latter nears the limit of its movement in one direction the pin will strike the spring and gradually depress the same, the reaction of the spring in tending to reassume its initial position imparting an initial impetus to the wheel and all of the parts connected thereto, so as t0 reduce the strain on the operator.

At the front end of the saw-carrier is a pair of spaced metallic plates 100, adapted for the reception of the saw-blade 101, and at a point near the end of the blade is an opening for the passage of a securing-pin 102, which extends through similar openings in the plates 100.

In the rear end of the saw-blade are two notches 110 for the reception of a laterally-disposed locking-pin 111, formed at one end of a rod 112, adapted to an elongated slot in the under side of the saw-carrier 50, and at the rear end of said bar isa spring 113, normally tending to hold the pin 111 in engagement with one or other of the notches. The extreme rear end of the springis connected by a suitable rod to a handle 115 at the rear end of the saw-carrier and in convenient position to be grasped by the operator for the purpose of withdrawing the pin from the notch with which it is engaged and allow said pinto enter the second notch after the saw has been moved to a slight angle. The sawblade is guided within the rocking frame between a pair of plates 116, having slightlyflaring end portions at the head of the frame, as shown in Fig. 5.

In order to permit the withdrawal of the saw-- carrier from its position between the twolower stringers to accomplish any necessary repairs, the slots 51 are continued out to the front ends of the stringers, the open ends of the slots being normally closed by verticallysliding bars 117, adapted to suitable guideways at thehead of the rocking frameand normally held in depressed position by springs 113. These bars form stops which positively limit the outward movement of the saw-carrier in the event of breakage of the connecting-straps, and they may be readily raised to p expose lthe ends of the slots should it become necessary to remove the carrier.

The head-block 44 projects beyond the front end of the rocking frame and is provided with a centrally-disposedvertical slot 119 for the reception of the back of a saw should it become necessary to raise the saw tothe approximately vertical position shown in dotted lines in Fig. v2 while moving the machine from place to place, and in order to temporarily lock the saw in this inoperative position I employ a sliding bar 120, passing through the guiding opening in the front plate 45 and provided at ICO its outer end with a hook which may be engaged between two teeth of the saw, excessive outward movement of the hook-bar being prevented by a laterally turned portion 121, which may engage vagainst a transverse bar 122 or against the inner portion of the headblock. With the rocking frame is associated an adjustable overhanging saw-guard of the construction best shown in Fig. 1 and comprising a pair of bowed springs 130, connected by a plate 131 and transverse cross-bar 132, the bar forming the fulcrum-point of the guard and being adapted to any one of a number of bearings on the head-block in order that the fulcrum-point may be changed in accordance with the angular position of the saw, the vertical adjustment of the rocking frame, or the character of the work to be performed. The several bearings on the head-block may be of any desired construction, a simple form being that illustrated in Fig. 1, wherein a number of pairs of pins 133, 134, and 135 are arranged near the opposite sides of the headblock and adapted to hold the fulcrum-bar 132 in place. In Fig. 1 the bar is shown as resting between the pairs of pins 135 and in Fig. 2 between the pairs of pins 134, or said pin may be moved into recesses 136 in the upper stringers when it is desired to adjust the -guard toinoperative position, as during the transportation of the machine. When the bar is resting in the recesses 136, it is locked in inoperative position by engaging the hooked ends 137 of a transverse bar 138, carried by the guard, with suitable eyes 139, carried by the cross-bar 42.

The lower ends of the springs 130 pass between the struts 46, and extending transversely across the space between said struts are a number of pins 140 for the reception of the hooked ends of the springs, the guard being adjusted into engagement with one or other of the sets of pins in accordance with the adjustment of its fulcrum-bar 132.

The outer portions of the bowed springs 130 extend when in working position in a substantially vertical line and are thence bent outwardly at a right angle, as indicated at 142, angularlydisposed plates 143 being employed to connect the vertical and horizontal portions of the spring and the latter being further connected at a point above said plate by a transverse base 144.

The plates 143 carry a transverse pin 145, on which is pivoted an angular block 146, having'a central slot 147, said block swinging freely on its pivot-pin. In the slotted portion 147 of the block is mounted a guard 148, pivotally hung at a central point on a transverse pin 149. This guard is in the form of an inverted U and is adapted to fit over the back of the saw, its opposite ends being outwardly flared to facilitate free movement of the saw-blade and the antifriction-rollers 150 being employed for contact with the back of the blade.

At the rear end of the main frame is a vertical standard 160, having atits upper end a horizontal arm 161, on which is mounted a grooved roller 162, and at the central portion of the transverse bar 43 is pivoted one end of a lever 163, having at its opposite end a pivoted arm 164, carrying a grooved roller 165, the latter being adjustable to a position under and to the rear of the roller 162. To the arm 161 is secured one end of a flexible cord or strap 166, which passes downwardly and under the roller 165 and thence up and Aover the roller 162, the lowerl depending end of said cord or strap being provided with a weight 167, which tends in a measure to keep the rear end of the rocking frame elevated and prevents any abrupt movement thereof when downward pressure is exerted on the operating-lever. Movement in the opposite direction to resist the upward thrust of the operating -lever is restrained by a second weight 16S, secured to one end of a cord or strap 169, passing over the grooved roller 165 and having its opposite end secured to a iixed portion of the main frame. These weights act as retarding devices to prevent free movement of the rocking frame in either direction during the movement of the operating-lever.

In order to prevent movement of the lever 163 toward that side of the machine where the operating-lever is rotated, the end of the arm 164 is provided with a pin 170, extending in a direction at a right angle to the length of the arm, and against the inner side of this pin passes a connecting cord or strap 171, secured at one end to the arm 161 and at the opposite end being fastened to a cleat on the main frame. The connection 171 checks any tendency of the arm to move toward the opposite side of the. machine, but does not in any manner interfere with the rocking movement of the saw-carrying frame.

Near the rear end of the main frame are two brackets 173, forming supports for the opposite ends of a transverse bar 174, to which is swiveled one end of a seat-bar 175, and the opposite end of said seat-bar is provided with dependent supporting-legs 176, adapted to rest on the surface of the ground. The seatbar is provided with a plurality of openings for the reception of lthe seat-posts 178, carrying an operators seat 179, the seat-post being vertically adjustable and being placed in any one of the receiving-openings to suit the convenience of the operator. When not in use, the seat-bar is thrown forward and rests against the rear end of the rocking frame.

' Having thus described my invention, what I claim is 1. Thecombinationina sawing-machine, of a wheeled frame, vertically-disposed guides thereon, a rocking frame, a fulcrum-bar for said rocking frame having its ends fitting into the guides, levers having a pivoted connection at one end with the wheeled frame and connected at an intermediate point to the fulcrum bar, means for locking said levers in IOO IIO

ISO

adjusted position, and sawing mechanism carried by said rocking frame.

2. 'lhecombinationinasaWing-machine, of a wheeled frame, vertically-disposed guides thereon, a transversely-disposed f ulcru m-bar adapted to the guides, adj listing-levers con nected to the fulcrum-bar, a rocking frame mounted on the bar, a reciprocating saw-carrier adapted to guides in the rocking frame, an oscillatory wheel mounted upon said rocking frame, flexible connecting devices extending between the rim of the Wheel and opposite end portions of the carrier, and means for operating said wheel.

3. The combination in asawing-machine, of a frame having guides, a saw-carrier adapted to said guides, a saw secured to the saw-carrier, an oscillating wheel mounted on the said frame, iiexible connecting devices extending between the rim of the wheel and the saw-carrier, and means for checking the movement of the wheel at the completion of movement in one direction and for imparting an initial impetus to said wheel at the beginning of the movement in the opposite direction.

4. Thecombinationinasawing-machine, of a frame having guideways, a sawcarrier adapted to said guideways, an oscillating wheel mounted on said frame, flexible straps or cords extending around a portion of the periphery of said wheel and connected at one end to the carrier, disks on the wheel at a point within the rim thereof, means for securing the opposite ends of the straps or cords to said disks, and means for circnmferentially adjusting said disks.

5. The combination in asawing-machine, of a frame having guideways, a saw-carrier adapted to said guideways, an oscillatin g wheel having a plurality of spokes, flexible cords or straps connected at one end to the sawcarrier and thence extending around a portion of the periphery of the wheel, disks mounted on the spokes of the wheel and connected to the opposite ends of said straps, each of said disks having a plurality of pinreceiving openings and the adjacent spoke members being provided with similar openings, and locking-pins for maintaining said disks in any position'of circumferential adjustment.

6. The combination in asawing-machine, of a frame having gnideways, a longitudinallyreciprocating saw carrier adapted to said guideways, a wheel mounted on said frame, iiexible connecting devices extending between the carrier and the frame of the wheel,

a spring carried by the frame, and a pin or lug projecting from the Wheel and .adapted for contact with said spring at the completion of movement of the wheel in each direction.

7. The combination in asawing-machine, of a frame havingguideways, a reciprocating saw-carrier adapted to said guideways, an oscillating wheel, iiexible connecting devices extending between the carrier and the rim of the wheel, a plurality of antifriction-rollers having an operative connection with the wheel and forming a gear, a gear-segment in- .termeshing with said rollers, a pivoted lever carrying said gearsegment, a pivotallymounted operating-lever, and links connecting said operating-lever to the segment-lever.

8. The combination in a sawing-machine,of a frame, a reciprocating saw-carrier guided in said frame, a shaft adapted to bearings on the frame, a wheel mounted on said shaft, flexible connecting devices extending between the opposite ends of the carrier and the rim of the wheel, a pair of 'spaced disks secured to the shaft, pins carried by said disks, antifriction-rollers mounted on said pins and constituting a gear, a gear-segment intel'- meshing with said rollers, a pivoted lever carrying said gear-segment, a pivoted operatinglever, and connecting-links adjustably secured to both the operating-lever and the segment-lever.

9. The combination inasawingmachine,of a frame, a saw-carrier guided therein, a shaft having bearings on said frame, a wheel mounted on the shaft, iiexible connecting devices extending between the opposite ends of the carrier and the rim of the wheel, a gear secured to said shaft, a gear-segment interineshing therewith, a pivoted lever carrying said gear-segment and provided with a plurality of bolt-receiving openings, a bracket comprising a pair of spaced plates having a plurality of pin-receiving openings, an operating-lever, a pin adapted to the openings in said plates and forming a fulcrum for said lever, there being a plurality of bolt-receiving openings formed in the operating-lever, connecting-links extending between the operating-lever and the segment-lever, and bolts extending through the openings in said levers and forming pivoted connections for the opposite ends of the links.

l0. The combination in a sawing'machine of a frame, a sawcarrier guided therein, a shaft having bearings on said frame, a wheel secured to said shaft, iiexibie connecting devices extending between the opposite ends of the carrier and the rim of the wheel, a gear secured to said shaft, a pivoted segment-lever having gear-teeth intermeshing with those of said gear, a pivoted operating-lever formed of a plurality of relatively-adjustablesections, means for locking the sections of the lever in adjusted position, and links connecting the operating-lever to the segment-lever.

ll. The combination in asawing-machine, of a frame, having slotted guideways extending the full length of the frame and open at the front ends thereof, an elongated bar forming a saw-carrier,means for reciprocating said bar, antifriction-rollers carried by the bar and adapted to said slots, spring-pressed locking bars normally closing the open ends of the slots, and means for connecting one end of said bar to the saw.

12. The combination in asaWing-machine, of a rocking frame, a saw-carrier guided in ICO said frame, means for reciprocating the sawcarrier, flexible straps or cords connected at one end to the rocking frame, guiding means for said straps or cords, counterbalanceweights connected to the opposite ends of the straps or cords and acting respectively in opposite directions and, by the friction of the straps or cords on the guiding devices serv.- ing to retard rocking movement of the frame.

13. The combination in asawing-machine, of a rocking frame, a saw-carrier guided therein, means for reciprocating said sawcarrier, an arm carried by said frame, a roller mounted on said arm,connterbalance-weights for retarding rocking movement of the frame in either direction,and {iexible straps or cords secured respectively to the counterbalanceweights and extending one over and one under the said roller in order to exert the force of their respective weights in opposite directions on said roller.

14. The combination in a sawing-machine, of a rocking frame, a saw-carrier adapted to guideways therein, means for reciprocating said saw-carrier, a fixed standard, a roller mounted thereon, a pivoted lever carried by the frame, an arm pivoted to said lever, a roller mounted at the outer end of said arm at a point adjacent to the standard-carrying roller, a iexible cord or strap secured at one end to the standard and passing under the roller carried by the arm and thence up and over the standard-roller, a counterbalancingweight secured to the free end of said cord or strap, a second cord or strap secured at one end to a fixed point and passing up over the roller carried by the arm, and a counterbalancing-weight secured to the free end of said second cord or strap.

15. The combination in asawing-machine, of the main frame, slotted standards carried thereby, a pair of pivotally-mounted adjustable levers extending through said standards and provided with shaft-receivingslots, means for locking said levers in adjusted position, a shaft extending through the slotted standards and mounted in the lever-slots, a pivoted frame secured to said shaft, a saw-carrier adapted to guides in said pivoted frame, and means for reciprocating said saw-carrier.

16. The combination in a sawing-machine, of a wheeled supporting-frame, a plurality of spaced standards mounted on said frame, a hinged cap-plate carried by one of the standards and embracing the mating standards, means for locking said cap-plates in position, spacing-blocks carried by the plates for preventing inward movement of the standards, pivotally-mounted levers guided between the standards and having shaft-receiving slots, means for locking said levers in adjusted position, a shaft carried by said levers, a rockv'Maar/4 ing frame mounted on said shaft, a saw-carrier adapted to guides in said rocking frame, and means for reciprocating said saw-carrier.

17. The combination in a sawing-machine, of a frame, a saw-carrier guided in said frame, a saw-blade having a pivotal connection with the saw-carrier, the frame having a saw-receiving slot arranged at a point above the saw-carrier and adapted to hold the saw from lateral play when in inoperative position, means for locking the saw-blade in operative position, and a hook-bar carried by the frame at a point above the carrier and adapted to hold the saw within the receiving-slot.

18. The combination in a sawing-machine, of a frame, a saw-carrier adapted to guides in said frame, a head-block forming a part of the frame and having a plurality of seats for a fulcrum-bar, an overhanging spring-guard, a fulcrum-bar carried thereby and adjustable to any one of said fulcrum-seats, means for engaging and holding the inner ends of said guard, and a saw-guide disposed at the outer end of said guard.

19. The combination in a sawing-machine, of a frame, a saw-carrier adapted to guides in said frame, a saw secured to the carrier, means for reciprocating the carrier, an overhanging guard adjustably mounted at the front end of the frame and adjustable to operative and inoperative positions, means for holding said guard in any position to which it may be adjusted, and a sawengaging guide disposed at the outer end of said guard.

2O.l The combination in a sawing-machine, of a frame, a saw-carrier adapted to guideways in the frame, a saw secured to the carrier, means for reciprocating the saw, an overhanging spring-guard, a head-block forming a part of the frame and provided with a plurality of seats for the fulcrum-bar of said guard, pins for engaging the inner ends of said guard, side plates carried at the outer end of the guard, a pivoted block mounted between said plates, a guide pivotally mounted on said block, and antifriction-rollers disposed in the guide and adapted to engage with the back of the saw.

21. The combination in a sawing-machine, of a frame, a guided saw-carrier, a carrier-reciprocating means including an operating-1ever, a swiveled seat-bar having a plurality of openings, supportinglegs depending from one end of said bar, and an adjustable seat-post adapted to any one of said openings.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

DAVID JOSEPH SHEA.

Witnesses:

E. W. KING, F. N. BURKE.

TOC

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