US1107625A - Chain saw. - Google Patents

Description

H. E. MARTIN.

CHAIN SAW.

APPLICATION FILED AUG. v, 1913.

1,107,625.. Patented Aug. 18,1914.

awuomto'o Maw/n0 1 0 W612? Mk n To all whom may concern i UNITED STAWENT 10 53 HORACE E. MARTIN, or Arrrmrs, GEORGIA. I

' CHAIN SAW.

13. MARTIN, at

Be it known that I, Homer. a citizen of the United States, residing Athens, in the county of Clarke and bt-ate' claimed.

In the drawings, Figure 1 is aside view of a portion of a chain saw construct accord ing .to this invention. Fig. 2 is a similar side view with one row of side links and cutting teeth removed, and showing in dotted lines the outline of the beveled portions which form the teeth of the other row of side links. Fig. 3 is a plan view of a portion of the chain saw. Fig. 4 is a crosssection, taken on the line w-m in Fig. 1.

The chain saw is formed of an endless chain of pivoted links provided with teeth, and it is adapted to run on a supporting frame of any approved construction, and to be driven by any approved driving mechanism.

Three kinds of side links 2, 3 and 4 are provided and are arranged opposite to each other in pairs. One pair of side links 2 is arranged alternately of each two airs of side links 3 and 4, and the side lin {s 2 are connecting and supporting links only, and are not provided with cuttin teeth. The side teeth 3 and 4 are provide with cutting teeth 5, and these teeth are made in various shapes in carrying out this invention. The cutting teeth arepreferably made of the shape shown, being curved forwardly and pro ecting over the front endsof the links 7 to which they pertain for about one-half the length of the links.

Y The front end portions of the shanks of the cutting teeth of the links 3 rest against the upper rear end portions of the connecting links 2, and the front end portions of the shanks of the cutting teeth of the links 4" rest against the rear end portions of the shanks of the cutting teeth of the links 3. The shanks of the cutting teeth of the links Specification of Letters Patent. Application filed. August 7, 1913. Serial No. 783,688.

Patented AugQlB,3,914.

3 land 4 difi'er somewhat in shape, but the cutting portions of the teeth 5 are preferabl alike. v

I Lachside link has an inclined projection 6 at 1ts rear end, which overla s an inclined pro ection 7 on the front en ad acent link, and prevents the saw from bending in one direction.

Three kinds of center links 8, 9 and 10 are provlded, and are arranged alternately in regular order.

of the next I The center links 8 are profi,

vided with forwardly projecting drag teeth i or planer teeth 12, the side portions 14 of which are wider than the links 8 so that they form stops which rest on the tops of the connecting side links 2. The dra tooth links 8 are pivoted to the real" en portions of the side links i and to the front end portions of the connecting side links 2 by pivot pins 15. The drag teeth are hook-shaped, and

have rearwardly and upwardly inclined shanks 16.

The center links 9 are provided with gage teeth 17, and are pivoted by pins 18 to the rear end. ortions of the connecting Side links 2 an to the front end side links 3. The gage teeti project over each end of the links 9. and are arran cd to extend between the top portions of the adjacent pairs of cutting teeth 5. Thefront ortions of the end portions 19 of the shanks of the gage teeth are curved and they overlap the drag teeth and their shanks.

The center links 10 are pivoted by pins 20 to the rear end portions of the side links 3 and to the front end portions of the side links 4. The center links 10 have upwardly projecting lugs 21 which forrn abutments for the rear end portions of the'gage teeth and their shanks.

All the center links have downwardly projecting lugs 22, or other approved means, for engaging with the driving wheel or wheels by which the saw is operated. The overlapping portion of the, links and the shanks of the teeth prevent the saw from bending in one direction when the saw is straight, and permit it to bend in the opposite direction so that it may pass over and engage with the supporting and driving wheels. These overlapping portions also strengthen or stiffen the teeth and prevent vibrations, and enable the saw to be used to advantage as a cross-cut saw for green lumber. As the drag teeth have laterally projecting side' portions they plane out the whole of the wood which has been sliced by the cutting teeth. The gage teeth prevent the cutting and drag teeth from cutting too deeply at a single cut, and the saw is there by relieved from too much strain.

, What I claim is:

1. In a chain saw, the combination, with side links arranged in pairs in sets of three, each two adjacent pairs of side links being, provided with cutting teeth, and the re-' maining pair being connectingilinksr of. three series of center links arranged in line with each other and pivoted to the side links, one series of center links being provided with drag teeth, the second series having gage teeth, and the third series being connecting links.

2. In a chain saw, the combination, with side links arranged in pairs in sets of three, two adjacent pairs of the side links being; provided with forwardly and upwardly? curved cutting teeth which project longi.-' tudinally beyond the ends of the links toj' which they pertain, and the remaining pairf being connecting links; of three series oi center links arranged inline with each other and pivoted to the side links, one series of; center links being provided with drag teeth, the second series having gage teeth, and the? third series being connecting links.

3. In a chain saw, the combination, with side links certain of which are providedi with forwardly projecting cutting teeth; arranged opposite to each other in pairs, of; center links pivoted to the side links, 'certainof thecenter links being provided with drag teeth having laterally projecting portions for the projecting front end portions? of the cutting teeth to overlap and rest 011/ 4. In a chain saw, the combination, with; side links certain of which are provided with cutting teeth, of center links pivotedi to the side links, certain of the center links: being provided with drag teeth, hai ingZ laterally projecting side portions which rest menses on the connecting side links between the toothed side links.

In a chain saw, the combination, with sidelinks provided with cutting teeth arranged opposite to each other in pairs, of

center links pivoted to the side' links, .cer

tain of the center links being provided with gage teeth which extend longitudinally be- "tween the cutting portions of two adjacent pairs of cutting teeth.

6. In a chain saw, the combination, with side links provided with cutting teetharranged opposite to each other-in pairsfof center links pivoted'to the side linksfcer i tain of the center links being provided with gage teeth which extend longitudinallybetween the cutting portions of two adjacent pairs of cutting teeth, and the center links next behind those with the gage teeth being 2 ing end portions which overlap. an rein force the shanks of the drag teeth: 8. In a chain saw, the'combination, With side links certain of which are provided with forwardly projecting cutting teeth arr signature in the presence-of two witnesses. I

HORACE 6E. MARTIN."

Witnesses:

HUGH I-I. GORDON, J12, HA RY, E. Towns.

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