US925684A - Hacksaw. - Google Patents

Description

Patented Julie 22, 1909.

2 SHEETS-SHEET 1.

v fi j HAGKSAW.

APPLICATION FILED F3114, 1908.

HQOOUPER.

FIG .l;

lll l WITNESSES:

'a front elevation-of a detaiLcertain partsunrrnn STATES PATENT. OFFICE.

Gnomes n. course, or ELMIRA nurcn'rs, NEW YORK, ASSIGNOR TO ECLIPSE MACHINE COMPANY, OF ELMIRA, NEW v nir, AYCORPORATIQNY-OF NEW YORK.

m cxsaw.

Specification oi" ll'ietteisi Patent.

Patented June 22-, 1909.

-.App1 i,cation filed February 14,1908. Serial No. 416.978.

To. all whom it may concern:

.;-Be it known that I,- GEORGE H; COUPER, a

'citizen jof the United States, and resident of Elmira Heights, inthe county of Ohemung and State ofNew York, have invented 'c erwin new and useful Improvements in Hacksa s, of-which the following is a sp ecifica'tion.

- ln-the drawin' s2" Figure 1 is elevation of the mac ine at the end ofthe first strokei-n sawing off a bar; Fig. 2 is a topplan view'of the same; Fig. 3is'a front elevation showing theniac'hineafter the bar has been completely sawed throu(g' ;1;--Fig;' 4 is an ale-,1 ofthe chuck, the

ration of. the. outer en cover-plate being renioved ;'Eig. 5 is a section on the line 59-5 of 'Fig. 4;. andFig; 6 is being'showr i in dotted lines.

; wheel 5 keyed to its rear end, and theinotion therefroirr'i is transmitted" to the shaft ,4-

' through a pinion 6 that meshes with'a gear 7- .on the latter shaft. In the drawings, the direct on of rotation of the shafts 13' and 4 is .-in(hcate(l by arrows. f

In the 'shaft 3 is'a coupling or'simillar device 8, o erated by a 1 handlevliilforthe purpose of isconnecting ble barrel 11 (Fig; '5).

the-p nion?) andthe mechanism driven 4) that is a holder or support for a series 0ft .wed e-faced blocks 1'3, 14, 15 and 16. These." g I blochs and the containing parts constitute a chuck for, gripping a bar of metal and hrldinjg it in a suita le osition for sawing screw 17 passes t rouglftheblock .13,' "and'by means of nuts 18, 18 is prevented frommov in'g longitudinally, and therefore, whenturned, said screwadvances the block '13-to the left or right, as the case may be. block is moved toward the right (Fig. 4), the

' inclined fa'ce'or edge 19 thereon, acting on duc'es an opposite efi'ect,-and the said The machine has a base orstandard 1, to. which is'fa'stened a frame'2 that supports in suitable bearings: transverse shafts-3 and 4; eThe'sh'aft 3-is revolved by means of 3 fbelt-,-=

If said l 1 the inclined edge of the block 14, forces the latter downward, and it,in a similarmanner, causes the block 15- to move toward the left and the block 16to move upward. An

opposite motion of the screw obviouslg 'prolocks are thereby uniformly moved away. from each other.. Owing to the powerful wedging action of the blocks u on one another, a powerful grip may be obtained upon a 'bar of "metal by applying a comparatively small amount of'power'to the screw. A-plate 2i, corresponding in size to the frame. 12, is screwed to the front of the latter to prevent the, blocks from falling out. The invention I I of. this application does not include this; specificform'of chuck,and otherforms are suit.- able for the machine. I 1

At the rear end of the barrel 11 is a flange 22 that has .a ratchet 23 upon its peri hery. A pawl 24, adapted to engage said ratc 'et, is

said barrel. 'A rod 26'is connected at one endto 'the'pivot 27 onwhich the pawl 24 is hung, and at the other end to-a wr1st-p1n28 thatis set in a disk 29 onthe shaft 4,, As

said shaft revolves (indicated by the arrow,

Fig. 1), and the wrist-pin '28 passes over it.

the pawl 24 is carried backupon the ratchet 23. As the said wrist-pin moves farther and passes underneath the shaft 4, the bar 26 pulls the top'of the ring 25 toward the right, and the pawl 24', engaging a tooth'of'the ratchet23, causes the latter, and therefore pivoted in a ring25 that is revoluble upon I the chuck which is integral therewith, to ar-' 1 I tially revolve. The bar of metal X belt in said chuck is ,thus intermittently-turned in the direction of the arrow in Fig.- 3 as the shaft 4 revolves. 4

Uponthe'b'earing 10, near the front, are set two o'sts 30, 30, and a crosshead'31 is vertical movement. Rigidly supported in said cross head are horizontal guide-rods 32,

through which the rods 32, 32 extend} n 'mounte' upon these so .as 'to' be capableof the lower extremities of said frame are suit able set screws for fastening an ordinary hack saw 35. A-weight 33" is cast in the frame 1 1 between the lugs 34, and serves to press the saw closely upon the work, and also steadies its motion. w

A lever 36 is pivoted at 37 to-one of the posts 30, and is connected to the crosshead 31 by a link 38. Upon this a weight 39 may be hung, which to some extent counterba ances the saw-frame 33 and the crosshead 31. The said lever may also be extended to form a handle 40 by means of which to raise and lower the saw-frame. When raised above the work for the purpose of adjusting the latter, the saw-frame and connected parts are retained in any desired position by means'of a dog 41 that is pivoted to the rear of the crosshead 31 andengages one of a series of notches 42 in a post 30. In order to lower the saw upon the work, the dog 41 may be disengaged by hand.

The saw-frame 33 is reciprocated horizontally by means of a pitman 43 that is pivoted to said frame at 44, and to the gear-wheel 7 at 45. -The connection 45 is made adjustable by a slot 46 or otherwise, for the purpose of adjusting the stroke of the saw 35.

The operation of the machine is as follows: The bar of metal X is clampedin the chuck jaws, while the saw-frame is in its elevated. position; and the latter is loweredto thepo sition shown in Fig. 1- by means of the handle 40. The clutch 8 being then thrown in by the lever 9, the saw is set in motion, the saw being held in contact with the work by the weight 33, and, if necessary, by additional pitman 43 is connected to the saw-fr r ,at such a point that the saw 35 is pu ed inscribed. At this time the saw 35 is being carried toward the left by means of the itman 43, and is cutting said bar. It wi seen that the bar X is thus revolved in a direction opposite to the cutting stroke of the saw, thus obtaining a greatercutting speed. A further advantage of this arrangement is that the length of the cut remains uniform as the saw progresses through the 'metal, because a fresh surface is turned into the path of the saw at every stroke of the rod 26. I also. call particular attention to the fact that the e 33 stead of pushed across the bar X during the cutting stroke, thereby preventing thechattering which frequently occurs, and giving a more even stroke. What I claim is:

A saw. machine comprising a suitable frame, vertical guides at one end thereof, parallel horizontal shaft bearings at the 0posite ends thereof, a vertically sliding saw ame carrier mounted onsaid uidesand provided in turn with longitudina ly extendmg guides, a saw frame having bearings slidingon said guides, a rotary chuck extending- .betweensaid vertical guides and at its rear GEORGE H. COUPER.

Witnesses:

DAVID L. YVHITTIER, LEONARD S. WHITTIER.

through part of a revolution, as before de 45

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