US1903479A - Tree sawing device - Google Patents

Description

April 11, 1933.

E. C. RUMOHR TREE SAWING DEVICE Filed Oct. 21, 1931 2 Sheets-Sheet l amv/Mio@ 6. Aya/vanos NNY April 11, 1933- E. c. RUMOHR 1,903,479

' TREE SAWING DEVICE.

Filed Oct. 21, 1951 2 Sheets-Sheetl 2 m agwg.

Patented Apr. 11, 1933 Umrrau STATES ERNEST C. RUM'OHR, OF' SEATTLE, WASHINGTON TREE SAWING :DEVICE Application med october 21, k1931. serial Na. 570,203.

This invention relates to improvements in a tree Vcutting apparatus, and has for its ob.- ject to provide an apparatus of this character, by means of which, a power operated saw may be conveniently applied, and a standing tree quickly cut in two.

Other features and objects will appear as the invention is more fully hereinafter described and explained in the following specifi cation, shown in the accompanying drawings, and finally pointed out in the appended claims.

In the drawings: Y. Fig. 1 is a plan view of the apparatus. Fig. 2 is a side elevation of same. Fig. 3 is a detail sectional View taken on the line 3-3 of Fig. 1. Fig. 4 is a cross sectional view of the eccentric.

Fig. 5 is a detail sectional view taken on the line 5-5 of Fig. 1.

Fig. 6 is a detail view, showing mechanism for feeding the saw.

Fig. 7 is a side elevation showing a tree partly sawed, and a screw means for holding the sawed parts spaced away from each other.

Referring now more particularly to the drawings, reference numeral 1 indicates a base, secured to which is a bearing 2, through which passes a shaft 3, upon one end of which is a gear 4. The opposite end of the shaft passes through a bearing 5, extending upwardly from an arm 5a, which is bent upwardly from the base and has a flange 5B. Extending upwardly from the base 1 are bearing blocks 6` and 7 secured in place by means of bolts 8. 9 is a motor secured to the base by means of bolts 10. To the shaft of the motor is secured a gear 11, which meshes with the gear 4. 12 is an eccentric member mounted on the shaft 3. 13 is an extension from a strap associated with the eccentric and which will be presently described. Pivoted to the extension 13 is one end of a pitman rod 14. The opposite end -of the pitman rod 14 slidably passes through a bearing 15, and its right hand end, Fig. 1, is secured at 15-a to one end of a saw 15-72. A strap 16 is fitted on the periphery of the eccentric 12, the strap being concave on its 22 to a boss '22-a extending from the bearing 'inner surface to snugly engage the convex periphery of the eccentric. Obviously when the shaft 3 is rotated, the eccentric 12 willV irnp part reciprocatory motion tothe pitrnan rod i 14, and the saw 15-b. The eccentric 12 is n keyed to the shaft 3 at 17, so that the eccentric rotates withthe shaft 3 and `also is permitted to 'slide back and forth on the shaft. 18 "is 'a boss ri-gidwith the eccentric 12 and through which the shaft 3 freely passes. The boss is Venlarged as at 19 and is provided on its periphery withV an annular groove 20. 21V is an arm, one of whose ends .is secured by bolts 15. The opposite end terminates in yoke members 23, (Fig. 3), which extend .into the annular groove 20 ofthe boss 1'8. Through the bearing 15 passes Ya screw threaded shaft 24 mounted in bearings in the blocks 6 and 7. l

A425 is a shaft passing through blocks 6 'and y7 and the bearing 15 so that the vbearing 15 ris permitted to slide upon the shaft "25. 26 is ashaft identical with the shaft 25 'and slidably passes through the bearing 15 and has bearings in the blocks 6 and 7. 27 is ajpro- "-jection from the bearing block 6 which is bored -through to Vreceive one end of `a shaft 28, the opposite end of said shaft fitting 'in a similar bearing .29 'extending from a block 30, identical with th'eblock 6. i

The' description just made of the left hand end of the apparatus describes the right lhand end, (Fig. 2), with the exception that :the

`description of the "le-ft 'hand endfnclu'ded the motor, eccentric, et cetera. Toeach lend of the shaft L28 is agear 31. The gear atthe left `hand end of the shaft 28 meshes with a similar ,gear 32 upon the shaft 24. The gear 31 at the-right hand 'end -of vshaft 28 meshes with a similar gear`33'upon the shaft 34 .identical with shaft 24. `Upon yone end, of the shaft '34 is a crank vv35, so that by turningthe crank, both shafts v24 and 34 are 'caused to rotate, vthus feeding the saw 115-6 aj,f fa"in`st,

is a tree, indicated at 736. 37 lis a l"link, one

thework, which as .shown in the drawingsf end of which is lpivotally connected to an arm f 38 mounted on the shaft and provided with a pawl 39, which coacts with a toothedv wheel 40 rigidly secured tothe screw shaft 24.

The opposite end of the link 37 is pivotallyconnected at 41 to a disc 42 secured to the shaft 3. By this arrangement, When the shaft 3 is rotated, the link 37 is reciprocated, causing the arm 38 to oscillate, which, through the pavvl 39, imparts a rotative movement to the screw shaft 24. The result of this is that thebearing 15 is advanced, carrying the savv 15--5 With it against the Work, and through the gears 31,'shaft 28, and gears 33, the bearing 44 isset or advanced forward in the same manner. The eccentric 12 and arm 21 also, of course, move With.- the bearings 15 and 44. v

45 1indicates jaw blocks vwhich are slidably mounted upon rodsv 46 which pass through bearings 47. The left `hand pair of the bearin, 2;s-47, (Fig. 1,), are securedy to the base 1 by bolts 48. The right hand pair of bearings 4'farevsecured to a plate 49 bymeans of bolts 5 0. Y 51, indicates bolts which pass through bosses 52 extending from the bearing blocks 45, and are provided with nuts 53, so that by turning thenuts, the jaw blocks 45 are drawn Atowards Yeachother in a transverse direction a saw reciprocally carried by said threadedly mounted blocks, a motor for reciprocating said saW, and a ratchet mechanism connected With the motor for turning the threaded shafts and -advancing the saW during the sawing operation.` y

' 2. 'A tree'sawing device as claimed in claim 1, with manually operated means for initially moving the saw to tree-engaging position.

In testimony WhereofI aiiix my signature.

c ERNEST o. RUMQHR.

so that; the boss of the jaw blocks Will sink into the treeto be savved.

In operation, one ofthe rods 46 is puiled ,through its bearing, and the apparatus is moved up to a tree, with thesaw 15-5 in contact with oneside of thetree. The rod 4 6, which was removed, is novvieplaced so -thatf'the apparatusV embraces the tree, las

shown in Fig. 1. rIhe nuts 53 arel now ad- ]u'sted to cause the gaws45 to sinkinto the surface of the tree and lfirmly grip the same,

yand thereby hold the apparatusin operative position. The motor then started, Which.

cip'ro'cate and saw into the tree, Asth-e sawing.operationj progresses, the saw 1s fed `through lthe shaft 3, eccentric 12, strap 16, pitman rod 14, causes the saw 15-5 to reinto thev tree through the feeding'mechanism already described, including the lblock 38,

par'fvl 39, disc 42, and link 37.

When the apparatus is placed in yitsposition, as shown in Fig. 1, ready to begin the sawing, the crank 35 may be turned so as'to `advance the saW up to the Work. 350

Whenthe tree is saWed sufficiently through to tend to clamp the saw, a threaded Wedge 36e-a may' be introduced behind the saw so .as to Wedge up the left hand :side of the partially sav/ed tree, as shown in Fig. 7

While I have shown and described a particular form of embodiment of my inveny tion, Iam aware that many minor changes Will readily suggest vthemselves to f those .skilled in the art Without departing from the spirit and scope of my invention. Itherefore desire to avoid being limited tothe partic- A`1.V"A tre`e sawingapparatus comprising a

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