US1266916A - Sawing-machine. - Google Patents

Description

'8. BUMPUS..

SWING MACHINE.

Armcnmn min oc. 14. 1914.

Patented May 21,1918.

3 SHEETS-SHEET 2.

S. BUMPUS.

SAWING MACHINE.

APPucATmn mso ocr. 14, um.

Patented May 21,1918.

3 SHEETS-SHEET 3.

auvents@ Y which support at t SAMUEL BUMPUS, 0F LA FAYETTL, KENTIIJ'CKY,

SA'WIN G-MACHINE.

Specioation o! Letters Patent.

Patented May 21, 1918.

'Application led Uetober 14, 1914. Serial No. 866,680.

To all fwhom 'it may concern.'

Be it known that I SAMUEL BUMPUS, a citizen of the United tates, residing at La Fayette, county of Christian, State of Kentucky, have invented certain new and useful Improvements in Sewing-Machines, of which the following' is a specification, reference being had therein to the accompanying drawing.

My invention relates to sawing machines and more particularly to a machine for sawingzice.

The object of the invention is to provide a machine of the above type adapted to do heavy work with efficiency and safety to the operator, while the parts are arranged with a view of .obtaining maximum simplicity and economy in construction and a completed structure requiring but little skill for its maintenance and repair.

A further object of the invention is to provide a machine of the above type in which the operating mechanism is well removed from the work, and the working bed or space and its vicinityis normally left clear and free of any power driven moving parts.

`Other objects of th invention are to provide an economical scheme for the transmission of power to the various driven parts, to provide an eilicient arrangement of coperating feed mechanisms artl automatic and partly under the contro 'of t e operator, and to provide various structural features particularly applicable to a machine of the type described.

My invention is illustrated in the accompanying drawings in which Figure 1 is a front elevation.

Fig. 2 is a ri ht side elevation.

Fig. 3 is a le side elevation.

Fig. 4 is a top lan view artly in section and with portlons emitter for the sake of clearness.

Fig. 5 is a detail view of a clutch mechanism.

Fig. 6 is a section on the line w-:v of

cfer to the drawings, 1 is a rectanguiar baisldlrame on which 1s erected vertical supports 2 and 3, preferably channel irons eir upper extremities a motor platform 4 built up of channel irons and ri idly braced to the vertical supports 2 and 3 y suitable. brace members 5 6 and .7-8, respectively. The motor platform sup` ports a suitable source of motive power such as the electric motor 9 which is so positioned that its driving pulley 10 extends out to one side of the mam supports. A tool carriage 11 is mounted to slide vertically between the upri hts 2 and 3 and for this purpose is provide with ways 12 and 13 engaged by the front flanges of the channel iron supports 2 and 3 respectively. The carriage 11 carries at each side of its lower portion the bearings 14 and 15 of the saw shaft 16 to which the saw blade 17 is rigidly secured outside of and to the right of the support 3, and which is rotated by a pulley 18 secured thereto where it projects outside of and to the left of the upfi ht 2. In order to preyent chattering or inding of the carriage 1n its movements up and down the su' ports, a suitable guide 19 is provided whic slid ably engages the forward flanges of the channel iron supports in the same manner 'as thel carriage 11 and is spaced apart from and rlfgidly connected with the carriage by means o the rack 20. The carriage is normally held in `its raised position by means of a weight 21 connected with the upper end of the rack through the chain 22 over the sprocket wheel 23 mounted on the bottom of the-motor platform 4 (Fig. 1.) Suitable grooves or channels are provlded in the side edges of the weight which fit over the rear dan es of the uprghts 2 and 3 and act as gui es in the movement of the weight. The carriage 11 is moved downward a ainst the gull of the weight by means of t e power riven lnion 24 (Figs. 1 and 4 which is mounte loosely on the constant y rotating shaft 25 and is adapted to be operativel connected with said shaft through the clutch mechanism 26. Motion is transmitted to the shaft 25 from the pulley 126 by way of the shaft 27, pinion'28 and internal gear 29. The clutch mechanism 26 (Figs. 1, 4, 5 and 6) is slidably mounted on the shaft 25 but connected to turn therewith by means of the key 30 and elongated keyway 31, and is slid to and away from the inion 24 so that its toothed portion 32 wil engage or be disengaged from the complementary toothed portion 83 carried by the plnlpn, by means of the operating arm 34 pivoted to the swivel rin 35. The operating arm 34 is adapted to e actuated manual] either way, by the hand lever 36 (Fig. 4 and automatically, for disconnecting t e clutch, by the cam 37 mounted near the upper end of the rack 20.

This automatic operation of the actuating cam is accomplished through the @am action of the cam 37 on the complementary cam 5 member 38 of the operating arm When llh carriage reaches its lowermost position. The upward movement of the carriage 11 is limited by means of a suitable positive stop mounted in its path and on a fixed portion of. the machine such as the stop 39 mounted on the support 3. A saw guard 40 is mounted on the support 3 and so ositioned as to shield the entire saw blade rom the opera.- tor when the tool carriage and saw are ih the raised position and to shield that por-y tion of the saw which is not covered by the material bein operated on when the saw is iii any of its lower positions.

Power is transmitted from the motor pulley to the eed mechanism pulley 126 and saw pulley 18 by means of the drivin belt Lil which is of suicient length to al ow a slack loop.42 extending downward at the rear ot the machine 'and passing over the slack pulley 43. See Fig. 3. The slack ulley is mounted in a bearing frame or b ook 44 slidably mounted on a pair of vertically disposed guide rods 45-46 (Figs. 1 and 3). The uide rods are held rigid and in fixed relation to the frame Work of the machine by means of the up er and lower cast arms 47 and 48. The s ack pulley 43 together with its block 44 slides loosely on the guide rods and rests. with its entire weight in the bight of the slack loop 42 so' as to kee a constant tension on the drivi belt. e work table or platform 49 is pre erably built up of metal between for drainage and has counter-sunk in'its surface a feed or friction roller 51 mounted to turn with the shaft 52 and on an axis transverse tothe work platform and the saw blade. The shaft 52 is turned by means of the bevel gearsl 53-54 (Figs. 2 and 3),

crank rod 55 and the hand crank lever 56. The crank rod and crank lever are mounted on the back or inside of thefence or guide 57. This fence is `preferably built up of angle irons and strap irons and is located on the far side ofthe work platform so as to act as a guide for the work. .In order that the roller 51 may engage the work with suffcient friction to feed it under the saw, its surface is iiuted or otherwise roughened as indicated (see Figs. l and 4). For the sake of rigidity and to keep the. arts in fixed relation, the lower end lof t e saw guard is bolted at 58 to the upper left-hand corner of the guide -fence 57. The discharge plat-V form 59 is a continuation ofthe work vplatform 49 and is also preferably built up of spaced strips. A A

'I he operation of the machine is as follows: :The motor 9 is started and transmits 65 its motionthrough the driving belt to the strips such as 50 with spaces' f eed and saw pulleys 126 and 18, respectively, which causes both the clutch 26 and saw blade 27 lto rotate, with the various parts of the machine in the positions indicated 'in the drawings. A piece of ice is then placed on the work platform 49 so as to rest on the feed roller 51 and against the guide france5? and is fed in under the saw blade at a suitable distance to the left thereof according to the thickness of the slab to be out. This feeding in of the ice is accomplished by the operator turning the crank handle 56 whose motion is transmitted through the crank rod 55, bevel gears 5ft-53, shaft 52 and feed roller 51 to the cake of ice resting thereon. After the ice has been fed in under the saw, the operator throws the handle of the clutch level-36 to the right which in turn throws the clutch cam 34 to the left carrying with it the clutch mechanism 26 and throwing the toothed portion 32 of the clutch mechanism into engagement with the complementary toothed portion 33 on the pinion 24. The pinion 24 is thereupon set to rotating and feeds the rack 20 and with it the tool carriage 11 downwardly against the pull of the weight 21. As the tool carriagefeeds down, the saw moves down with it out of the ard 40 and through the cake of ice unti it passes into slot 400 and so cuts'through the cake of io, at'which point in the operation the cam 37 on the upper end of the rack bar engages with the cam 38 on the clutch throwing the clutch over to the right and out of engagement with the toothed portion 33 of the pinion 24. The pinion 24 then turns idly on the shaft 25 permitting the rack 20 and carria e 11 to ascend back to normal position un er the pull of lthe wei ht 21, and as soon as the saw blade rises c ear of the cake of ice, the machine is ready for cutting another slab. This cycle of operation is repeated for each slab out, the cut slabs being either removed separately or pushed over onto the discharge platform 59 by the feeding in of the cake of ice and removed in g Itgrs will be noted that the clutch mechanism 26 is always under the control of the operator thus affording him moans for restoring the saw blade at any time in the cycle of operations or for causing the saw blade to move back down through the ice before it has moved all the way up to its normal position. In short, the operator can 'vary both the length and limits of the cuttingstroke, at will, which gives a flexible control and renders the machine useful for cutting blocks of ice ofA various sizes.

The machine is here shown in its simplest Having Ilm#P flvsmilled my invent-icm what I claim :md flusilv tn swiult by Letters Pah cnt. is:

l. In un iov cutting nmuhinv, n vertically mm'nhlc fruiting mnh :i work platform in ih(l mth of snit] tool fm' lvwling wml-z hm@- tu. :l guido fence vxtcmling upwardly fumi the rear of said platform and toward the tool in thu dirvi-tion nll thil fried., and :1 Stz1- tiomn'y yshivlil or gum-ll fm' salirl foul mutuall)v holding' :tml hhl hy said guido lcme t0 fol-m :l rigid stl'uctm'v.

2. n an il'fcutting machine` a vm'tully lnovnhle cutting tunl, :t work platform in the pntli ufszlhl tolli for l'meling work then!- lo, :l gniflv l'tmfv vxtvmling upwardly from the rem' nl said plutfrrll'm :mil toward thft tool in the rlil'mrtion of the fumi, and :L staA tiunuly shield nl' gum-fl for mit! nl mulini :illyF holding :nul hohl h); nifl guide fence to form u rigicl ti'lu't1ll'u. togfthr with :l feed rollmnmlmml in .will platform :md operatingr munita thvrol'm nimmtd un thi,l I'czu' Sida 0l Suid g'llidv 1ct-nml.

3. A sawing machine comprising a base frmnc. :1 pair of hamm; mounted vertically' m1 nid hush lrzlm. :l motor plulgfmm mountml on thvy lil-pm' vmls thereof, said lnotur platform holdin;- :md lutlcing .Quid beams in pmalivl :llinmm-xlt. :l Lhmhlv sot 0f Slidnwnys minimi h v will vertical beams, a tool Carling-v nml cmmtmwuight therefux' mounted mwh ma 1mll will sms' 0f Ways, a saw cul'- I'iml hy will (':ui'izlge :unl hivf-n by Suid mutui'. menus 'lm fvmlingthe #mw carriage up .-iml ahum. :t driving shaft; for said fcntllngV imams mmmlml inY said beams bctwevn .will wis nf wuym and :i Clutch controlling the crmmectirm between thu Said driving slml't :unl the ftfvtling :nouns n'xolmt'ml nu. thc d1i\ ing shaft.

In usimcmy whclwf I :lllix my Signature in prvsence of [wn \\'itness@s.

SUVIUEL BUMIUS. 'i nese;

,En L. Wffmirus,

Y WESLEY RUM PUQ

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