US1352512A - Saw - Google Patents

Description

SAW.

PatentedSept. 14,1920.

2 SQHEETSSHEET 1- Wow,

APPLICATION FILED APR. 25.1919.

R. W. GRAVES AND S. M. HOLT.

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SAW.

APPLICATION FILED APR. 25. 19).

PatentedSept. 14; 1920.

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RoBERT w. GRAVES, or ELIZABETH, NEW JERSEY, Ann SAMUEL MIDDLETON HOLT, or WASHINGTON. DISTRICT or COLUMBIA; SAID oLT'nssIeNoR To SAID GRAVES.

SAW.

Specification of Letters Patent. Patented Sept. 14, 192i).

Application filed April 25, 1919. Serial No. 292,649.

To all whom it may concern:

Be it known that we, (1) ROBERT W. GRAVES, a citizen of Canada, and (2) iliAMUEL MIonL'E'roN HoLT, a citizen of the United States of America, residing (1) at Elizabeth, (2) Washington, District of Columbia, in the county of (1) Union and (1) State of New Jersey, have invented certain new and useful Improvements in Saws, of which the following is a specification.

The primary object of the present invention resides in the provision ofa hand saw especially adapted for felling trees and cutting logs and timber, the construction being such as to render the cutting operation easily and quickly accomplished by a single operator, the type of saw herein shown and de scribed being of like character to the type of saw, shown, described and claimed in Patent 1,127,883, granted to Robert W. Graves, February 9, 1915, and particularly relatesto certain new and useful improvements thereover.

A further object of the invention is to provide a hand saw that is adapted to remain in forceful engagement with the work, thus permitting the operator to devote his entire energies to the reciprocating cutting operation and rendering the. severing of elevated limbs and beams less arduous than under the usual circumstances of sawing, wherein it is necessary to force the saw into engagement with the work in addition to causing a reciprocatory movement thereof.

A still further object of the invention is to provide a saw with a guiding means readily adjustable for accommodating work of different diameters, the saw beingresiliently held into engagement with the work until the completion of the sawing operation.

A till further object of the invention resides in the provision of a sawing device having a measuring armconstituting a presser bar for the saw whereby the diameter of an object to be severed, as well as other measurements may be easily determined.

' With these general objects in view the invention consists ofthe combination and arrangement of parts hereinafter fully described inv connection with the accompanying drawings and in which like reference characters designate corresponding parts throughout the: several views.

mally closed position.

In the drawings,

Figure 1 is a side elevation of the invention partially broken away and illustrated by dotted lines in its operative position adjusted forcutting a log,

Fig. 2 is an edge view of the same looking toward the rear of the saw,

Figs. 3, 4 and 5 are transverse sectional views taken upon lines Inf-III, lV-IV and V-V' respectively of Fig. 1,

I Fig. 6 is a detail view of the spring adusting means, I

Fig. 7 is a transverse sectional detail view taken upon line VII'VII of Fig. 1,

Fig. 8 is a view similar to Fig. 1, of a different form of the invention,

Figs. 9, ,10 and 11 are sectional views taken upon lines IX-IX, X-X and XL-XI respectively of Fig. 8,

Fig.12 is an elevational view of a portion of the invention shown in Fig. 8, with the guide at a different adjustment and the saw adjusted upon an extension and Fig. 13 is a side elevation of a portion of another modified vvconstruction adapted for sawing felled trees.

Referring more in detail to the drawings, our invention essentially comprises a handh; frame having two hinged handle bars, 10 and 11 provided with a saw blade 12 adjustably carried by the bar 10 and a presserbar guide 13 for the work adjustably carried bythe bar 11 suitably spaced from and adapted to cooperate with the blade '12 for sawing the work such as thelog 14.

The handle bars 10 and ll taken with the rigid brace 15 carried at the forward end of the bar 10 constitute a substantially rectangular frame whensaid handle bars which are pivoted together at 16 arein their nor-- The brace '15 has a foot 17 adapted to engage the free end portion of thehandle bar 11 while the outer end of the foot carriesa post 18 parallel with the brace 15 for slidably mounting the saw 12 thereon. The post 18 is in the form of a flat bar slidably positioned between. parallel guides 19 secured to one face of the base or larger'end of the saw 12, as shown in Fig. 1,-with the cross piece 20 connecting said guides'19 and overlying the post 18, thesaw 12 being adjustably supported "on the foot 17 and secured in the desired "position by a set screw 21 threaded through the cross piece 20 for engaging the :post 18.

handle bar 10 while the other end of'the' spring is adjustably secured to the handle bar 11 by means of a locking plate 28 slidably mounted upon, the handle bar 11 and adapted for maintaining its position when adjusted by canting slightly to bind upon the bar 11.

It will be understood that both handle bars 10 and 11 are preferably cylindrical in cross section and may be formed of tubing, the rear end of the bar 10 preferably having an inclined section 24 for positioning aeneath the arm of the operator when sawing lowered objects during which operation,

the handle bars are grasped by the forward Cit grips 25 and 26 upon the handle bar 10.

A. grip 2. is secured to the rear end of the section of the handle bar 10 while the grip 29 is adapted to be grasped for use together with the grip 28 mounted upon the handle portion 10 rearwardly of the handle 25. It will of course be apparent that any of said grips may be employed which will be more convenient to the operator for re ciprocating the saw 12. The hand grip-26 has an adjustable mounting rod 30. permitting said grip to be turned inwardly as indicated by dotted lines in Figs. 1 and 4 of the drawings for convenience in packing or carrying the device.

A double triangular brace 31 connects the handle bar 10 with the block 17 and adjacent bar of ley wheels 32 journaled therebetween and inwardly of said handle bars 10 and 11 with the spring 21 mounted to travel thereover between the braces 31. A similar pulley wheel 33 is carried by a bracket 34 upon the handle portion 11 with the spring 21 run ning over the same, while depending ears upon the braces 31 are guidingly placed at opposite sides of the roller 33 when the handle is closed as shown in Fig. 1 of the drawings.

The presser-bar guide 13 is in the form of,

a longitudinal arm having a shank 36 adjustably secured to a depending arm 3'? at the free end of the handle bar 11 while a set screw 38 retains the same upon said arm. Suitable graduations 39 upon the guide 18 may be employed for measuring the diameter ot' the work 14.

hen it is desired to saw an object such as the trunk of a tree and it being desired to leave two inches unsawed to be broken off by the falling of the tree the blade 12 and presser-bar guide 13 are adjusted upon the post 18 and arm 37 respectively to position the inner engaging edge 40 or the presser bar guide 13 and the toothed cutting edge 41 of the blade 12 substantially the brace 15, and carries spaced pnltwo inches apart while the handle bars 10 and 11 are in closedposition. Sn spreading the guide and blade against the action of the spring 21, the device is arranged to have the tree 14 positioned between the saw guide as shown in Fig. 1 and reciprocated by grasping the grips 27 and 29 or 25 and 26. The drawing of the blade 12 and guide 13 toward each other by means of the spring 21 retains the teeth 41 in positive cutting I engagement with the work 14 withoutany effort on the part of the operator. The presser-bar guide edge 40 is slightly rounded and may form. a groove upon one side of the tree 14 further insuring the uniformity of the path of travel of the saw during the cutting operation and maintaining the horizontal alinement f the saw and guide.

The tension of the blade 12 upon the work is regulated by adjusting the plate 23 of the spring 21 either toward the grip 27 to increase the tension or toward the bracket '34 to deer ase the same. The brackets 42 of the gri 25 and 29 serve as guides through which the spring extends.

The main elements of the form of the in vention shown in Fig. 8 are similar in operation and structure to that heretofore described and provides two handlebars 10 and 11 hinged together as at 16 with a spring 21 anchored to a clip 22 upon the bar 10 and passing over the rollers 32 and 33 carried by the handle bars 10 and 11 respectively with the other end of the spring secured to an adjusting plate '23 upon the bar 11. A grip 27 is provided on the rear end of the structure while intermediate hand grips 29 and'25 are carried by the bar 10.

an arm 37 angularly projects from the free end of the handle bar 11 for engagement by the free end of the handle portion 10 when normally in its closed position. A 13 is adjustably mounted by means of a shank 36 upon the arm 37 being secured in adjusted position by the set-screw 38. A sawbla de 12 is adj ustably mounted by means of a strap or bracket 43 upon the blade slidably mountedupon a post 18 carried by the free end of the handle bar 10 outwardly thereof and in longitudinal aline ment with the arm '37. A set-screw 21 through the strap is adapted to bear upon the post 18 for securing the saw-blade 12 in its adjusted position, the said connection being best illustrated in Figs. 3, 10 and 11 of the drawings. The handle bars 10 and 11' are separated against the action of the spring 21 in the manner heretofore noted and as illustrated by dotted lines in Fig. 8, the guide 13 having a longitudinal bearing rib 40 while the blade and guide are relatively adjusted for receiving the work in the manner set forth. A stop bar 44 is hinged as at 45 to the inner end of the porting the same.

hand grips 25' and has an end 46 spanning the handle member 11' as well as the spring 21 and slidably mounted thereon during the opening of the handle The stop member 44 limits the extent to which the handle may be opened thereby limiting the size of work receivable between the blade 12" and guide 18. The pivotal connection 16 is separable for detaching thehandle member 11 and permitting the stop member 44 to be removed therefrom while the pivot is also removable at will. i This enables the changing of the stop member 44 for one of a different length, which is essentially serviceable where the law of the locality forbids the cutting of trees below a certain diameter and the provision of the stop 44 provides an automatic means for preventing the operator from cutting smaller trees than those permitted by law. Gage marks as15: inch, 20 inch and 25 inch' as shown on the bar 11 in Fig. 8 may be provided which will enable the operator to quickly determine whether the treebe below size ornot. Fig. 12, a portion of the "invention set forth in Fig. 8 is illustrated but with the saw 12 adjustably mounted upon an extension an angle to the handle bars 104i. The

saw 12 illustrated inFig. 8, may be reversed upon the post 18" forbi'inging the teeth 41 adjacent thehandle bar lO'whonever the saw is not-in'use or when trans- Inall ofthc forms of the lIlVBllt lOll, the saw blade and guide are-readily removable as well as interchangeable to accommodate the device for varying conditions.

l poiiv turning the hand, grip 26 inwardly, in the structure illustratedin Fig l, of the drawings, the blade 1.2 -may be reversed upon the post 18 and the presser-bar giiide 13 reversed upon the arm 37, so that the invention assumes a compact arrangement" for packing and handling without danger of injury either to the device or the person carrying the same.

Attention is called to the fact that in the present device, the presser-bar is of such construction as to prevent same from flex-l ing, and thus at all times exerts an even pressure to prevent any wabbling of the saw working of the saw.

have found that by constructing this presser-bar of wood, n the form shown in of secured to one of said handle bars the other end of the spring adjustably se- 13 a portion ofthe invention as illus} I is set forth with the blade 12 and resser-bar guide 13 POSltiOliBd at its other end i u other handle bar; 3. A saw comprising handle barspivot bar guide secured to one of saidhandle be it:

during operation, and resulting in easy In actual practice, we

F g. l, or of tube steel in the form shown in Fig. 8, and inserting the thin edge strip 40, th'e'latter will indent into the bark of the tree orlog and maintain this position,

so that the easy working of the saw is assure-d.

fid hat we claim as newand desire to secure by Letters Patent is I 1. A saw comprising a handle frame of substantially rectangular form comprising two handle bars, pivotal connections between said handlebars at one end of'tlie frame, anarm and a post in l tueinal alinement with each other carried by the -'scp'arate handle bars at the opposite end of the frame, a presser bar guide and a saw 7 blade adjustably mounted upon said arm *and post projectingin opposite directions from said handle bars, rollers carried b each bar, a co l Spring 112N131? one end rewith.

cured to the other handle bar and passing over said rollers whereby tlie resilient con nection between the portions of the handle is adapted for adjustment at will, and the hand grips carried by one of said handle portions.

2. A saw comprising handle bars pivotally connected together at one end, a presserbar guide secured to one of said handle bars at the opposite end of the device, a saw blade secured to the end of the other handle bar spaced from said guide adapted for the reception of the work between said blade and guide, pulley wheels 'jouriialedadjacent J the forward portions said "handle por- 7 tions, a coil spring secured to one of said handle bars passingover said pulleys with ally connected together-at one end,a press rat the opposite end of the 'deViceQa saw blade securedto the end of the other lien 'dle bar spaced from said'giiide adapted for.

the reception of the work between said blade and guide, pulley wheels jouriialed ads jacent the forward portions of said handle portions, a coil spring secured to one of said 1 handle-bars passing over saidpulleyswith its other end ad ustably attached to the other handle bar, a plurality of hand. grips rigidly securedto one of said handle bars and another hand grip adjustably mounted upon the same handle bar adapted for partial rotation thereon. 4. A saw comprising a handle frame formed of pivotal 1y connected bars, an arm ustabty attached to the carried by the free ends of one of said bars and a post carried by the free end of the other, the arm and post extending at right angles to the longitudinal axis of said frame a presser-bar guide mounted upon said arm, a saw blade and means adapted for mounting the blade upon said post at difi'erent distances from said guide when the handle is in its normally closed position.

A saw comprising a handle frame formed of pivotally connected bars, an arm carried by the free ends of one of said bars and a post carried by the free end of the other, a presser-bar guide mounted upon said arm, a saw blade and means adapted for mounting the blade upon said post at different distances from said guide when the handle is in its normally closed position, a coil spring adjustably connected between said handle bars to vary the tension thereon and anti-friction wheels carried by each of said handlebars over which said spring is adapted to travel.

6. A saw comprising a handle frame formed of bars pivotally connected together at one end of the device, a presser-bar guide and a saw secured to the adjacent onus said handle bars, connectingmeans between said handle bars including a' pivoted stop having slidable connection with one of said handle bars and adapted for limiting the distance between said guide and blade when the handle is opened to the limit of its pivotal movement.

7. A saw comprising a substantially rectangular handle frame formed of two bars pivotally connected together at one end of the frame, a saw blade projecting from the unpivoted end of one of said handle bars, a guide projecting from the end of the other handle bar adj acent said blade, a mounting member upon one handle bar, a stop pivoted to said mounting member having a handle at its free end surrounding and slidably mounted upon the other handle bar adapted to automatically outstretch during the separation of the handle bars whereby the size of work receivable between said guide and blade is adapted to be limited.

8, A saw comprising a handle frame embodying bars pivoted at one end to each other, a brace secured to the free end of one bar and engaging the adjacent free end of the other bar to hold the bars spaced in suban adjustable saw and presser bar guide associated with the free ends of said bars.

an adjustable saw and presser bar guide associated with the free ends of said bars, and means for limiting the opening movei'nent of the bars.

10. A saw comprising a handle frame embodying bars pivoted at one end to each other, a brace secured to the free end of one bar and engaging the adjacent free end of the other bar to hold the bars spaced in substantial parallelism, variable tension means connecting the free end of said bars, an ad justable saw and presser bar guide associated with the free ends of said bars, and means pivoted to one bar and slidably associated with the other bar for limiting the opening movement of the bars.

11. A saw comprising a handle frame embodying bars pivoted at one end to each other, a brace secured to the free end of one bar and engaging the adjacent free end of the other bar to hold the bars spaced in substantial parallelism, variable tension means connectingthe freeend of said bars, and an adjustable saw and presser bar guide associated with the free ends of said bars, the saw and presser bar guidebeing adjustable transversely of the end of the handle frame with the longitudinal axis thereof at all times extending in parallel to the axis of the frame.

12. A saw comprising a handle frame embodying bars pivoted at one end to each other, a brace secured to. the free end of one bar and engaging the adjacent free end of theother bar to, hold the bars spaced in substantial parallelism, variable tension means connecting the free end of said bars, and an adjustable saw and presser bar guide associated with the free ends of said bars, the saw and presser bar guide being adjustable longitudinally of longitudinal axis thereof remaining at all times at right angles to said brace.

In testimony whereof We affix our signa- ROBERT W. GRAVES. SAMUEL MIDDLETON HOLT.

- tures. stantial parallelism, variable tension means connecting the free end of said bars, and

the brace with the

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