US822056A - Portable sawing-machine. - Google Patents

Description

PATENTED MAY 29, 1906,

A. KNOX.

PORTABLE SAWING MACHINE.

APPLIUATIDN FILED MAE. 1, 1904.

'3 SHEETS-SHEET 1 No. 822,056. PATENTED MAY 29, 1906.

' H. A. KNOX.

PORTABLE SAWING MACHINE.

APPLICATION FILED MAR.1,1904.

3 SHEETSSHEET 2.

'[ mzwyes:

HQKKNOX.

PORTABLE SAWING MACHINE.

PATENTED MAY 29, 1906.

APPLICATION FILED MAR. l, 1904.

3 SHEETSSHEET 3,

UNITED STATES OFFICE.

HARRY A. KNOX, ()F SPRINGFIELD, MASSACHUSETTS;

PORTABLE SAWlNG-IVIACHINE.

' To all 1071.071]. it miuy concern.-

maintain the saw-blade 1n proper working po-- sition and it has for one of its objects the pro vision of a mechanism which may be supported on a portable frame and employed in a convenient and expeditious manner for felling trees, es ecially in lumber regions, where ordinarily a arge number of men are engaged in this work. Q

My invention has, furthermore, for its object the combination, with the band-saw, of guides therefor whereby the running and'cut tin portions of the band-saw are brought together and constrained for the movements in )roximate relations, so as to cut but a single kerf, and inasmuch as these portions are running in opposite directions the pull on the ame is equalized,thus obviating any tendency of shifting the same longitudinally of the saw cut;

Furtherobjects and advantageous results under this invention will be found to be attained in and by the particular organization and construction of the mechanism, as here inafter set forth, and as illustrated in the ac-- companying drawings, in which similar characters denote similar parts in all the views, and in which Figure 1 shows a sawing-machine embodying my invention as in use on a tree to be felled. Fig. 2 is a view of a modification of the saw 'and its operating mechanism actuated by a flexible shaft to which motion may be imparted from any convenient source. Fig. 3 is a front view of the mechanism shown in Fig. 2. Fig. 4 illustrates a cross-section of the band-saw on line 4 4, Fig. 2. Fig. 5 is a detail View in section of one of the frameclamping (,levices. Fig. 6 is a section on line 6 (i, Fig. 7. Fig. 7 represents a top view of a modified fornrof the saw-supporting frame. Fig. 8 shows a guard for the pecllliarl \'a| ranged band-saw.

Specification of Letters Patent.

Application filed a ch 1.1904. Serial No. 196,030.

Patented May 29, 1906.

As above stated, the machine forming the subject-matter of this invention is especially adapted for use in lumber regions where large numbers oftrees are to be felled, so that portability and simplicity of construction constitute important requirements, and since the tree-cutting operations are spread out over a large territory I deem it preferable to provide each saw with its own power device, therefore making each mechanism self-contained and independent from any other. On the other hand, I wish it distinctly understood that I do notlimit myself to such combination, since a general station may supply power to a number of different saws.

Referringto Fig. 1, a good understanding may be obtained of the adaptation of my invention to practical use, and here it will be seen that the framework comprises a pair of parallel tubular rigid side rods or bars 10 11, the former, 10, of which loosely supports a pulley or wheel 12, held against longitudinal movements on the rod 10 by a collar 13 and also by a bracket 14. Loosely mounted on the side rod or bar 11 is a band-Wheel 15, having inthe present instance agear 16, to which movement may be imparted by a motor M, (shown as a gas-engine,) the casing of which is rigidly secured upon the rod 11, while another bracket 17, similar to the one designated by 14, is disposed at the other side of the pulley 15, and thus prevents longitudinal movement of the latter on the rod or bar 11. The pulley 15 constitutes the driving member for a band saw S, which passes around the pulley 12, and the upper and lower runs S and S respectively, of which are maintained adjacent each other by guide-pulleys 21, journaled on studs projecting from the brackets 14 17, above mentioned, and one or more of the guide-pulleys 20 and 21 has near its rear edge, corresponding to the back of the saw-band, the flanges 1, which resist any tendency of the working runs or courses of the saw to be transversely displaced or distorted.

It will be seen that two sets of rollers are employed at each end of the saw, there being one set to maintain the upper and lower runs of the saw in close facial contact and the second set or pair being disposed one on the outer side of each of the saw-runs, but between lhe first set and the pulley over which the band passes. 'lhcse rollers, comprising the second set, are spaced. apart from each other in order to permit the saw courses to approach thc first set of rollers in a gradual curve, the peripheries of said rollers at the point they engage the saw courses extending inwardly over a line tangent tothe. meeting faces of the first set of rollers and the carrying-pulley. 'l 'he spaced rollers notonlycausc the saw courses to approach the first set of rollers in a gradual curve, but also tension the saw so as to hold the same in close frictional contact with the driving pulleys. 'lliese spaced rollers preferably carry the flanges for resisting lateral thrust of the saw.

The side rods 10 and 11 are engaged by rods 25, having split'hubs '26, provided with clamp-screws 27, wh le their inward extensions 28 are provided with r ght and left hand screw-threads to receive turnbuckles 29, whereby the distance between the rods 10 l l, and hence the tension on the saw S, may be regulated, as described.

In order to facilitate the manipulation of the frame during the sawing operation and to guide the saw so as to cut the tree in a straight plane, a supporting-frame, such as shown in Fig. 1, may be built up, this frame comprising horizontal runners 30, supported by posts 31, driven into the ground.

By referring to Fig. 4 it will be seen that the teeth of the saw are slightly bent or "set outwardly, as indicated at 50, so that only the smooth surfaces of the upper and lower runs may contact with and slide upon each other, and canisequentlv all liability of interference, as far as the teeth are concerned, is avoided, and the necessary clearance-space for the escape of the sawdust is established. The saw-blade, in addition tothc outwardlyset teeth, may have some of its teeth, as shown at 52in Fig. 4, in the plane of the blade. While under ordinary conditions the frictional contact between the saw S and the driving-pulley 15 may be sufficient to run the band-saw, the latter may be provided with a Series of perforations 35, adapted to be engaged by projections 36, formed on the driving-pulley, and the saw may thus be driven in a positive manner. These perforations may have the double advantage of bein a part of the saw-propelling means and of emg measurably self-frceing of sawdust.

As above mentioned, I prefer to organize each sawing-machine with its own motor, as seen inv Fig. 1 i but the driving-pulley 15 may be driven in the manner shown in. Fig. 2, in which a bevel-gear 37, attached to the pulley 1.5 by bolts 38, is engaged by a pinion 39, to which motion may be-imparted from any convenient source through the medium of a flexible shaft ll) In Figs. 6, 7, and 8 l have illustrated a modifical ion of the saw supporting and tensioningtlcvice. the lower run of the saw being tangent to the peripheries of the pulleys 15 12 and the upper run being correspondingly lowered by idlers 41,-the flanges f of which serve for the purpose of receiving the lateral thrust of both runs during the sawing operation. In this instance the brackets 43 are shown internally screw-threaded to engage the exterior threads of the distancing rod or brace 44.

From the above description it will be understood that my improved sawing-n'ia'chine may be. readily adjusted and assembled to form a rigid structure and that, furthermore, the device comprises a knockdown frame which may be taken apart for transportation, or it maybe packed into a very compact forma feature which is of the utmost importance in machinery of this kind on account of longdistances to be traversed and.

the ditliculty of handling bulky articles.

Aconsidcrable latitude of change may be permitted in the design and detailed construction of the several parts without departing from the spirit of my invention.

In Fi 8 a rigid guard J is shown as extended f1 0111 one of the side members of the supporting-frame and having an extension back of the superimposed courses of the bandsaw, the same comprising a saw-back-bearing mcmber' and upper and lower jaws or member 4 f f, which overlie and underlie the portions of the saw which-are running in facewise proximity, this a pliance resisting the transverse thrust and, rec ing both courses of the saw in their desired c oscly-runhing relations. a f

While the described machine is largely used in the felling of trees, it is also available for sawing off limbs of the fallen'tree and for cutting the trunk into suit-able lengths, it being understood that the supporting-frame may be given a vertical instead of a'honzontal position or any oblique position to accord with the particular situation or condition in vide the saw-frame which will be as light as possible, and yet sufficiently rigid and stable,

to have the motor, which may be gasolene,

steam, hydraulic, electric, compressed-air,-or other type, mounted ona smal truck, which may be hauled around in conjunction with the saw-frame and with the saw-driving roll on which such motor isconrected by a flexible shaft, as hereinbefore mentioned.

Having thus d escribcd my invention, What I claim, and desire to secure by Letters Patent, is-

1. The. combination with a band-saw and pulleys supporting the same, of a frame comprising a pair of side rods each supporting one of the pulleys, distancing-rods connecting said side rods and provided with adjusting means whereby the side rods may be moved with relation to each other, and meansto permit a movement of the distancing-rodslongitudinally of the side rods.

2. In Combination with a band-saw and pulleys supporting the same, of a frame com prising pair of side rods each supporting one of the pulleys, distancing-rods connecting said side rods and rovided with adjusting meanswhereby the side rods may be moved with relation to each other, means to )ermit a movement of the distancing-rods longitudinally of the side rods, and a motor carried by one of the end rods and geared to the pulley mounted on said rod.

3. The combination with a band-saw and pulleys supporting the same, of a frame comprising a pair of side rods each supporting one of the pulleys, distancing-rods connecting said side rods and rovided with adjusting means whereby the side rods may be moved with relation to each other, means to ermit a movement of the distancing-rods limgitudinally of the side rods, and means for clamping said side and distancing rods to each other. v

4. The combination with a band-saw and pulleys supporting the same, of a frame comprising a pair of side rods each supporting one of the pulleys, distancing-rods connecting said side rods and rovided with adjusting means whereby t e side rods may be moved with relation to each other, means to permit a movement of the distancing-rods longitudinally of the side rods, means comprising a split hub carried by the distancingrods and receiving the side rods, and means for clamping said hub to said side rods.

5. In a sawing-machine, aportable frame comprising a pair of side rods and a pair of end rods having laterally-adjustable connections with said side rods, a pulley journaled on each side rod, an endless band-saw supported by saidpulleys and having different running portions in close proximity and a motor mounted on one of the side rods and having a gear connection with the pulley thereon.

6. In a sawing-machine, a portable frame comprising a pair of side rods, and a pair of end rods having laterally-adjustable connections with said side rods, a pulley journaled on each side rod, an endless band-saw supported by said pulleys and having different running portions in close proximity, a bracket-arm carried by each side rod and extending within the bounds of the frame, and spaced tensioning-rollers carried by each arm, and arranged on opposite sides of the sawruns, said rollers having peripheral flanges constituting abutments for the rear edge of the saw to prevent lateral thrust.

7. In a sawin -machine, a portable frame comprising a pair of side rods, and a pair of end rods having laterally-adjustable connections, a pulley j ournaled on each side rod, an endless band-saw supported by said pulleys and having different running portions in close proximity, a bracket arm carried by each side rod and extending within the bounds of the frame, and an idler-pulley car'- ried by each bracket-arm for maintaining the runs of the saw in facial contact, said idlerpulleys having peripheral flanges constituting abutments for the rear edge of the saw to prevent lateral thrust thereof.

8. The combination with a band-saw arranged with different running portions thereof in proximity, and pulleys supporting the same, of a knockdown frame comprising a pair of side rods for supporting said pulleys, distancing-rods having hubs to receive said side rods, and clamping members for securing said side rods and distancing-rods, together.

9. The combination with a band-saw, and pulleys supporting the same, of a knockdown frame, comprising a pair of side rods for sup orting sald pulleys, distancing-rods having ubs to receive said side rods, clamping members for securing said side rods and distancing rods, together, and a motor mounted on one of said rods and connected with one of said pulleys.

10. In a portable sawing-machine, a ortable frame comprising in part a pair 0 side rods, a pulley journaled on each rod, an endless bandesaw supported by said pulleys, and a motor mounted on one of the side rods and having a gear connection with the pulley thereon.

11. In a portable sawing-machine, a portable supporting-frame therefor comprising a air of side rods and a air of end rods, a niley supported by eacl i side rod, an en less band-saw supported by said pulleys and having different running portions in close proximity, a motor supported by one of said side rods, and gearing connecting saidmotor with the pulley thereon.

Signed by me at Springfield, Massachusetts, in presence of two subscribing witnesses.

HARRY A. KNOX. Witnesses:

WM. S. BELLows, A. V. LEAIIY.

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