US925553A - Portable sawing-machine. - Google Patents

Description

G. M. BARKER.

PORTABLE SAWING MACHINE.

APPLICATION FILED FEB. 6, 1909.

Patented June 22, 1909.

4 SHEETS-SHEET 1.

G. M. BARKER.

PORTABLE SAWING MACHINE.

APPLICATION FILED PEB.6,1909.

925 553 7 Patented June 22, 1909.

4 SHEETS-SHEET 2.

a 5 (Z w 0. M. BARKER. PORTABLE SAWING MACHINE.

APPLICATION FILED FEB-6, 1909.

Patented June 22, 1909.

4 SHEETS-SHEET 3.

u z rzwegan C. M. BARKER.

PORTABLE SAWING MACHINE.

APPLICATION FILED IEB.6, 1909.

Patented June 22, 1909.

4 SHEETS-SHEET 4.

CHARLES M. BARKER, OF PLYMOUTH, WISCONSIN.

PORTABLE SAWING-MACHINE.

Specification of Letters Patent.

Patented June 22, 19.09.

Application filed February 6, 1909. Serial No. 476,362.

To all whom it may concern:

Be it known that I, CHARLES M. BARKER, a citizen of the United States, and resident of Plymouth, in the county of Sheboygan and State of W'isconsin, have invented certain new and useful Improvements in Portable Sawing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof.

The object of my invention is to provide a durable, simple and light portable motordriven reciprocative' saw, its construction and arrangement beingsuch that it can be readily transported and operated in forests, by a single operator, its various adjustments rendering it possible to effectually operate upon either standing or felled timber.

With the above objects in view, the invention consists in various details of construction and combination of parts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents a side elevation of a portable reciprocative sawingmachine embodying the features of my invention, the machine being shown in the position assumed when sawing a horizontal log and with parts broken away and other parts in section to better illustrate the structural features; Fig. 2, a plan view of the same with parts broken away and in section; Fig. 3, a plan view of the forward portion of the machine with the working parts in the position they assume when sawing standing timber, detail parts of the machine being broken away and in section. to more clearly illustrate the invention; Fig. 4, a fragmentary detail side elevation of the saw-adjusting and reciprocative guiding mechanism upon an increased scale, the view being takcn looking toward the drive-side of the machine; Fig. 5, a cross-section of the machine, as indicated by line 55 of Fig. 2; Fig. 6, a cross-section of the same, as indicated by line (36 of Fig. 2, Fig. 7, a crosssection taken upon line 77 of Fig. 2; Fig. b, an enlarged detail sectional plan view of the frame, the motor being removed therefrom; Fig; 9, an enlarged detail section View ol the saw-tension device and cross-head, the

view being taken upon line 99 of Fig. 3;

Fig. 10, an enlar ed detail section on line 101O of Fig. 8, s rowing the clutch controlling lever lock, and Fig. 11, a detail crosssection of the machine, as indicated by line 1111 of Fig. 1, the view illustrating one form of support for the saw end of the ma chine.

Referring by numerals to the drawings, 1, 2, indicate skeleton brackets that are suitably braced and connected by cross-rods 3 to constitute a motor-frame section, in which motor frame section is supported a motor 4 of any standard construction, the motor in this instance being shown as of the internal combustion type, for which an oil-supply tank 5 is provided and is suitably secured to said motor frame.

A motor-shaft 6 carries a sprocket-wheel 6 that is in link-belt connection with a larger sprocket-wheel 6", which sprocketwheel is carried by a hollow counter-shaft 7, the latter being mounted upon a fixed arbor 8 provided with ball-bearings for the hollow counter-shaft. The ends of the arbor 8 in turn are fitted into adjustable bearingblocks 8' supported by the motor-frame, by means of which adjustment the slack in the aforesaid link-belt is regulated together with the slack in a similar link-belt that is carried by a smaller sprocket-wheel 9 also fast on the counter-shaft 7, this last named linkbelt being designed to impart motion to sprocket-wheel 10 loosely mounted upon a driving-shaft 11. The sprocket-wheel 10 carries one member of a friction-clutch 12, the opposite clutch-member 13 being in splinesconnection with the driving-shaft. A hollow hub 14 of the clutch-member 13 has fitted therein a coil-spring 15 that is held under tension by an adjustable collar 16, which collar is in screw-threaded engagement with the driving-shaft end, as bestshown in Fig. 8. Loosely fitted within an exterior annular groove of the hollow hub 14 is a ring 17 pro- 1 clutch-lever being fulcrumed to the motorthe S8.\\'tll'l\"ll1I-l1i((l1211115111 and a portion of engagement, the clutch-lever is locked by predetermined load condition.

being provided 'diate spider 22, w

means of a dog 19, which dog is pivoted to the adjacent skeleton bracket 1 and is adapted to engage and hold said clutch-lever in its locked position, it being understood that the coil-spring is adjusted to exert suflicient pressure between the clutch-members to cause rotation of the driving-shaft under a Bi; utilizing a s ring-controlled friction-clutc as descri ed, should the saw or other mechanism become choked or stopped for any cause, said clutch will stop and thus prevent a breakdown or overstrain of the machine.

The motor frame, driving-gear and various adjustments and clutch described, are de-' signed with a view to obtainingthe maxi mum of strength combined with a minimum of weight together with efiiciency and economy in developing the required power, and it should be understood that these details may be varied within the knowledge of skilled mechanics to accomplish the desired objects. Secured to the drivin -shaft opposite its clutch-end, is the huhfig a crank-wheel 20, which crank-wheel comprises a pair of parallel disks that are fa st to said hub and also connected by bolts ar-wees passing through thirnbles interposedfbetween the disks, construction being preferable in order to insure rigidity and lightness; althou h if desired'l may in some instances use a 'ly-wheel either in the form of additional weight to the crank-wheel or a se arate wheel, in which case the same con (1 .be attached to the clutch-end of the driving-shaft to effect a more perfect balance in opposition to said crank-wheel.. v

The forward end of the motor frame comrises a head 20 which head is secured by olts between the skeleton brackets 1, 2, respectively. ,Brazed or otherwise secured to t e he'adiZO are a series of longitudinal tubes 21, the'tubesbein all secured to an interme- 'le the main or backbone tube 235mm series 'together witlitwo of the auxiliary tubes extend throughfsaid spider and are also connected to an outeri head 24.

The auxiliary tubes 21 terminate at-the outer head 24, while the backbonetube 23 proeither one of a (pair of notches 45 formed in the faceof sai jects beyond the same to form inner and outer bearings for a saw-table 25, the latter with aperturedears 26, 27, that are loosely mounted upon said back-'- bone tube. The outer ear abutted against a and the inner ear abuts the adjacentface'of the outer head 24 and is provided with a handle 28 having a spring-controlled dog 29 for engagement with notches of a detent 30 forming part of said outer head. From the foregoing description it will be understood this 27o thef -table is collar fast ,on the.tube 23,

that the saw-table can be swung to a vertical or horizontal position by means of the handle 28, in either of which positions it may be locked by the dog engaging the notches of the detent, whereby adjustment of the saw is effected to cut in a vertical or horizontal position, the saw being supported and guided by said saw-table in a manner to be described.

The arrangement of tubes which extend from the motor-frame and together therewith constitute a support for the saw-table, may be varied or brazed in any manner consistent with Well known laws of such structural work, and it is obvious that in some instances, the motor-frame section may be formed by continuing said tubes rearward and bending the same upon themselves to form the outer members of the skeleton brackets 2 in place of forming the latter in separate castings as shown.

Swiveled to an adjustable lu -extension 31 fast upon the skeleton brac et 2 is a hanger 32, which han er carries a pair of par lel guide-rods 33 t at are connected at their outer ends to a vertically disposed sector 34. The sector teeth are meshed with a worm 35 carried by an arbor mounted in bearin s of a bracket 36, which bracket is secure to the intermediate spider 22 and is provided with guide-wings 37 that overlap and engage the edges of the toothed sector to prevent lateral play of the same. The worm spindle is rovided with a hand-wheel, by means of 'ch said worm is rotated, whereby th ation of the guide-rods in'conh the sector 34 is regulated, said guide-rods; being swung upward or downward upon the rearward swivel-connection.

A cross-head 38 is slidably mounted upon the guide-rods 33 and is provided with a stud 39 u onwhich is fitted one end of a pitman 40 t e opposite end of the pitman being connected to a wrist-pin 41 carried by the crankwheel 20, by means of which pitman reciprocative motion is imparted to the cross-head. Directly forward of and alined with the stud 39 is a centrally apertured ear 42 that projects from the cross-head, the axis of the aperture therein being at a ri ht-angle to the axis of said stud 39. Fitte into the aperture of the ear 42 is the shank of a clip 43, which clip is provided with a spring-controlled plunger 44, that is adapted to engage ear"42, the notches bein spaced apart at an a proximate angle 0 ninet degrees. By t e arrangement just described it will be seen that the clip may be adjusted from a vertical to a horizontal position and locked in either position for the pur ose of accommodating the saw when sai saw is to be adjusted either for vertical 'or horizontal work, the saw being connected between the ears 48 of the clip, the axis of the .pivotpin of which rod is alined with and forward of the shank of said clip but at a rightan le to said shank. The forward end of the ro 46 is rovided with a socket-plate in which is suitably secured a saw-blade 49, the latter being parallel with the saw-table 25 and is sup orted and uided therein by means of a s 0e 50 carried by said saw-table, the shoe having a flat spring tongue 51 that overla s and exerts ressure upon the upper face 0 said saw-bla e.

It will be readily understood from the foregoing description, that reci rocative motion is imparted to the saw-bla e through its connection with the crank-Wheel, and in order to insure a positive feed of said sawblade, 'whereby the teeth of the same are held to their work, I have provided a springpower feed in connection with the saw toget-her with provision for adjusting the s ring-power in order that feed may be relatlve to the condition required or material being cut. With this object in view an arm 52-having branches 53 that are connected by a sleeve 54 is ivoted between the ears of the "shown in Figs. 3, 4, and 9. coil-spring 56 engages a stud 57 that extends clip""4'3, the s eeve being provided with an apqerture through which a-plvot pin 55 passes, w ich pin is carried by said clip-ears, as best One end of a from one of the clip-ears 48, the spring being coiled about the'sleeve 54 of the arm and terminates with a hooked end, which end is socketed into a washer 59. This washer is loosely mounted upon the sleeve 54 and is provided with a serles of radial spokes 60, which spokes are ada ted to be engaged by a loop 61 that is slida 1y mounted u on the adjacent'braoket 53 of the arm-52, t 1e said loop being held in adjusted position upon the branch, by a suitable set-screw. The outer end of the arm 52 terminates in an apertured head, through which head the saw-carrying rod 46 passes, the s ring-tension exerted by the arm 52 thereon eing thus transferred to the saw-blade. K Should it be desired to increase or decrease this tension, it is evident that the washer 59 may be turned either to wind or unwind the coil-spring, said washer bein thereafter locked by means of the slidable oop.

To control the saw in opposition to the spring-pressure exerted thereon, a lever 62 is fulcrumed to the saw-table having its free end provided with a concaved roller, which roller engages the saw-carrying rod 46. The lever 62 is inlink-connection with a handlever 63 that is also fulcrumed to the sawtable and provided with a spring-controlled pawl for engagement with a notch in a detent forming part of said saw-table. By means of the hand-lever the saw-blade may be withdrawn from a saw-kerf and locked in the position as shown in Fig. 3, in which position the cutting-f0 rce.

saw-teeth are held beyond the line of the log to be cut preparatory to setting the machine in working-position, the saw-blade being thereafter released by the operator freeing the pawl of the hand-lever 63 from the detent.

Log-chucking mechanism comprising .a .dog 64 is adjustably mounted upon a draw-bar 65, one end =01" which draw-bar is hinged to a hand-crank 66 fulcrumed :to the saw table. The dog 64 is arranged to engage the log in opposition to a fixed dog 64 carried by said saw-table, as shown in Fig. l, and when the log is chucked the hinge-connection of the hand lever passes across a line drawn through the fulcrum point of said hand-lever a sufiicientdistance to constitute a lock, .the

aforesaid hand-lever being stopped by .a pin 66* that projects from the saw-table. For the purposeof an additional support for the saw-end of the machine in connection with the chucking-mechanism, when said machine r is operating upon standing .timber, I have provided a $8 111'67 located intermediate of the describe chucking dogs. The spur is also carriedby the saw-table and is inclined at an angle .thereto in a downward direction, whereby the weight of the front end of the machine will cause the spur to enter .the log and thus assist in supporting said weight.

As shown in Figs. land 11 of the drawings, the motor-frame section is provided with a brace-bar 68 having a horizontally disposed pintle, upon which pintle is hung a supportlng truck 69, the latter being provided with runners 70 for convenience in supporting and transporting the machine.

chucking-mechanism and saw-table in connection wlth a log to which said machine is attached.

As illustrated in Figs. 1 .and 2 ofthe drawings, the machine is set to operate upon a horizontal log and the chucking-mechanism is locked together with the saw controlling lever 62. In starting the machine, the controlling lever 62 is first released to permit the coil-spring 56 through its connection to act, thus causing the saw-blade teeth to zbe pressed against the log with the necessary The motor being now started, reciprocative motion is imparted to the saw-blade, whereby it performs the usual cutting, entering at each stroke deeper into the log. When operating u on horizontal logs, as shown in Figs. 1 an same be of great diameter, it is obvious that the saw-carrying rod 46 will change its angle For these run ners however, 1n some mstances,'wheels may" 2, should the tongue 15, the latter parts being only necesdirected to exert its orce in the lineof cut.

,machine of the type describe with relation to the line of travel of the crosshead as the saw-blade descends into the log and consequently the power exerted by the pitman would have more or less tendency to cause a buckling effect upon the said rod. This tendency is overcome by means of the swiveled guide-rods 33 being adjusted as to angle from time to time relative to the sawcarrying red by means of the worm and toothed sector before mentioned. After the saw-blade has entered the kerf a sufficient distance, it leaves the guide-shoe 50 and sary at the start in the operation. To set the machine from its position for operating horizontal logs to a position for operating u on standing timber, the spring controlled unger 44 of the cross-head clip together with handle 28 of the saw-table 25 are released. The saw-table is then revolved upon the back-bone tube 23, by means of the handle 28, to ahorizontal position as shown in Fig. 3, in which position it is locked by the pawl and detent, the clip 43 being also turned upon its shank until theplunger 44 looks into the upper notch of the clip-ear 42 correspond ing to the position of said clip. Thus it will be seen that the saw-blade has been reversed from a vertical cutting position to a horizontal cutting position together with the axis of both the saw-carrying rod 46 and arm 52, whereby the springressure of the latter is Having thus described mechanism for car rying out my invention, it is apparent that a may be constructed economically and li ht and so conveniently arranged as to ren or it capable of being transported and manipulated by a single operator, in any location where it is possible for the operator to have access thereto, it being desirable as far as the structural features are concerned, to em loy standard parts accessible in the open mar et. The adjustable lug-extension 31, as best seen in F1 4, is designed to be raised or lowered, w iereby the rear ends of guide-rods may be set at different angles relative to the frame for the'p'urpose of changing the angle of said guide-rods at this end in addition to the adjustment previously described in connection with the forward ends thereof.

I claim: 1. A portable reciprocative sawing-machine comprising a skeleton-frame, a motor carried by the frame at one end thereof, a I crank-wheel revolubly mounted in the frame I adjacent to the motor and in gear-connection therewith, an angularly adjustable sawtable carried by the skeleton-frame opposite its motor end, a saw-blade in sliding engagement with the saw-table, log-chucking means carried by said saw-table, a cross-head, i uides for the crosshead carried by thej frame, a springcoi1ti'olled rod connected to 1 the saw-blade, the rod bein journaled on said cross-head, means for efiecting adjustment of the pivotal connection between the rod and cross-head, and a pitman-connection between the aforesaid cross-head and crankwheel.

2. A portable reciprocative sawing-machine comprising a motor frame section, havin g a series of 1011 itudinal forwardly extendin tubes, a head 1n rigid connection with the tu eends, a saw-table supported by the tubes having angular adjustment re ative to the head, a saw-blade in sliding engagement with .the saw-table, a motor-driven reciprocative cross-head supported by the longitudinal tubes, an ad'ustable spring-controlled rod connected to t e cross-head, and to the saw-blade.

3. A portable reciprocative sawing-machine comprising a motor frame section having a series of longitudinal forwardly extending tubes, ahead secured to the tube-ends, a saw-table supported by the tubes, having angular adjustment relative to the securing head, a saw-blade in sliding engagement with the saw-table, a motor-driven reciprocative cross-head supported by the longitudinal tubes, an ad'u rod connected to the cross-head, and to the saw-blade, a hand-lever in connection with the spring-controlled rod, and log-chucking mechanism in connection with the saw-table.

4. A portable reciprocative sawing-machine comprising a motor-frame section having a series of longitudinal forwardly extending tubes, a head secured to the tube ends, a saw-table supported by the tubes, having slidable adjustment relative to the head, a saw-blade in connection with the saw-table, a motor-driven reciprocative cross-head supported by the longitudinal tubes, an adjustable spring-controlled rod connected to the cross-head, and to the saw-blade, a supporting-truck in connection with the motorframe section, and log-chucking mechanism in connection with the saw-table.

5. A portable reciprocative sawing-machine comprising a skeleton-frame, a motor carried by the frame at one end thereof, a drive shaft, a spring controlled frictionclutch mechanism carried by the drive-shaft, a counter-shaft in gear-connection with the motor and one member of the friction-clutch mechanism, an angularly adjustable sawtable connected to that end of the skeletonframe opposite the motor end, log-chucking mechanism carried by the saw-table, a sawblade located adjacent to and parallel with the saw-table, a guide-shoe for the saw-blade carried by said saw-table, parallel guide-rods adjust-ably supported by the skeleton frame, a reciprocativc cross-head carried by the guide-rod, a spring-controlled rod connected to the cross-head at one end, and secured at 'ts opposite end to the saw-blade, a controlstable spring-controlled V ling-lever for the rod, a hand-lever in linkthe county of Sheboygan and State of Wisconnection with the controlling lever, a consin in the presence of two Witnesses.

crank-wheel secured to the drive-shaft, and a CHARLES M. B ARKER.

pitman in connection with the crank-Wheel 5 and cross-head. Witnesses:

In testimony that I claim the foregoing I H. J. RODNEY,- have hereunto set my hand at Plymouth, in CHAS. G. FISCHER.

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