US1037675A - Automatic flying shears. - Google Patents

Description

J. SIMPSON. AUTOMATIG FLYING SHEARS. APPLICATION TILED APB..8,1911.

1,037,675. Patented Sept. 3, 1912.

'7 SHEETB-SHEET 1.

INVENTOR J. SIMPSON. AUTOMATIC FLYING SHEARS. APPLICATION FILED APB.8,1911.

Patented Sept. 3, 1912.

7 SHEETS-SHEET Z.

J. SIMPSON. AUTOMATIC FLYING SHEARS APPLICATION YILED APR. 8. 1911 Patented Sept. 3, 1912.

7 SHEETS SHEET 3.

INVENTOR J. SIMPSON. AUTOMATIC FLYING SHEARS. AIPLIGATION FILED APR.8,1911.

4M m? 1: m w v E 0 w L J. SIMPSQNE AGTOMATIC PLYIHG SHE-ABE. APYLICATIONFILED APR.8,1911.

Patented Sept. 3, 1912.

7 SEEETSSHEET 5.

Ryan-on $60M J. SIMPSON.

AUTOMA'PXC FLYING SHEARS.

APPLICATION FILED APB-1,3911.

Patented Sept. 3, 1912.

'7 SHEETS-SHBET 6.

s E s s E N n w IQ SIMPSON.

AUTOMATIC FLYING SHEARS;

Ammcnxon rum) Arms, 1911,

1,037,675. a en ed Sept. 3, 1912.

7 SHEETS-SHEET 7.

WITNESSES Mia-m,

UNITED STATES PATENT OFFICE.

JAMES SIMPSON, OF McKEE$POR-T. PENNSYLVANIA. ASSIGNOR TO NATIONAL TUBF COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPGRATION OF NEW JERSEY.

AUTGMATIC FLYING SHEARS.

Specification of Letters Patent.

Intvnted Sept; 3, 1912.

Application filed April 8, i911 Serial No 6191542.

new and iimitiil Automatic Flying! ffilhcnr 0t i min tn he ent 41 tn ernihle tht I1tl!lil)t,1' 01' l hftir into -\lll ll the rullr tl nmttriuls :110 wt to he viii-int! in iiit tho nirtit-nlzir length \viihnnt ll-luv in the? operation (if v Milling mill. ixnntlzt-r uhjvt't ht thig invignlion lri t0 pr0- vitltf 'itill'iilfl zllil'iil'tilili having improved 111mm Whert-hy the i it'tin g movement of the lil'tl! knives is iu't-vt-ntml vvillmni' stopping: tin; upt-riitiun ml the -llt:;tl knife driving Hit hnnisni \vlllli lEiHitl iul: n1? nut lining full lHftXttll thvhlltll' ii livin- (if this apparatus and A it hunt th s l wl' tltllt mln rxvise metros in r-t;t!'lit"* th :iplmi'iitin :ili l to PM l|fl\lll f iniltllfillt of the 1 are cut is Hit in" H! tlit on the line IILJH of Fig. 1 showing the shear knives and knife actuating mechanism. Fig. i. a detail sectional side elevation. showing the controlling mechanism engaged by the material being sheared dur ing the shearing operations. Fig. 5 is an irregular sectitmal end elevation showing the connections between the cross-head and pitnien and the construction of the crosshead slides or ways. Fig. (3 is a detail end elevation showing the tinting mechanism by which the shear knives are caused to move into and out of operative position at predetermined intervals. Fig. 7 is a detail sectional elevation on an enlarged scale, the s tion being taken on the line TIL-III of big. 1. showing the shear knife actuating mechanism and the means by which the actuating mechanism is held in its inoperative position. Fig. 8 is a similar view, showing the shear knife actuating mechanism in its, operative position and the relative posh tion of the mechanism by which the knife a tuating mechanism is held in inoperative position. Fig. i) is a plan showing the variable speed meclmni m for regulating and controlling the time intcrvalshetween which the shear knives are positively actuated through their cutting movement.

in the accompanying drawings, 2 designates the bed plate or base of the apparatus, se ured by the foundation bolts 3 to the shear foundation 4 and mounted on opposite sid of the base 2 are the standards or housings 5. .3. which are fastened to the base 2 by means of the bolts ti.

The housings as shown are made in two transversely divided sections, the top and bottom section being rigidly connected together by the. bolts 7. links 11 and bolts 12, so 2|:- to be substantially integral. A spieader or separator 8 is arranged to ex tend between the opposite inner faces of the housings 5. the top ends of the homings being rightly secured to the separator by means of the. through-bolts l). Each of the housings 3, 5. is provided with a recess or opening it) which extends horizontally in tit) ward from the front face or edge of the hou ing upon the. discharge or delivery ,ttl of the shear, the open ends of the gaps non malty being closed by the straps or links ll. which are deta hably secured in place by the bolts 12 o as to permit. the reciprocating cross head 13 the ends of which project through the gaps l l. being readily removed and r placed in opeiative position in ere t ing and repairing the :tp iaratus. he t'liti:-. f the reciprocating "ro rlt tltl iii are pro- \dcd with wrist pins ll. 11. by which the WW4 head is connected to th connecting rod: or pitmcn It. 1 and the, cross hcad is al o provided with renewable wear plates or Sll it\ l 'i lfi. which contact with lltc --lltlc\ or removable wear plat s l7. 17, on the top and bottom surfaces of the gaps 10. 10, so as to form ways or slides for the cross head 13.

Detachably secured on the cross-hcad it) is the bottom shear knife 1!). the movable upper or top shear knife 20 being removably secured in place. on the vertically movable slide or knife support 21, which also is mounted on the cross-head 13. The slide or top shear knife support 21. which is arranged to mow verticall on the cross-head 13 in causing the top shear knife 20 to move into and out of cutting engagement with the bottom shear knife 19, is provided with end portions 21" which extend into the recesses 22, 22, in the cross-head 13. forming the slide ways or guides for the vertically movable support 21. (See Fig. 5.) Helical springs 23, 523, are interposed between the bottom or under surface of the end portions 2.1 of the shear knife support 21 and the bottom of the recesses 22 in the cross-head 13 to normally hold the top shear knife support 21 and shear knife 20 in lifted position relative to the bottom shear knife 19. Bolts 24, 24. over which the springs 23 are placed, extend through the openings or holes 2 26. in the support 21 for the top shear knife and through the openings 2T, 27, in the cross head 13 to limit the upward movement of the support 21, a rubber washer 28 preferably being provided upon each of the bolts 24, between the nuts on these bolts and the bosses on the lower face of the cross-head 1b to yieldingly oppose the thrust of the springs 23 on the support The lower section of the housings 5 which is secured upon the base or bed plate 2 is provided with integral rearward extensions 29 in which areformed the bearings 30, 30, for the shaft St on which the bottom pinch roller 32 is keyed or otherwise secured. The bearing 33 for the shaft 34, on the ends of which the crank disks or gears 35, are secured, and the l'iearings 3t ihh'for the driving shaft 237 on which the pur driving pinions 38, 38. are keyed or otherwise fa tcncd aralso on the rearward extension 2 the teeth of the spur pinions th. meshing with the spur teeth of the crank gears 33 on the driving shaft ill. The crank gears or tll l\.s I53 on the shaft 34 are provid d with crank pins 259 to which one end of the conn cting rods or pitmcn 15 are mounted so as to opcratively connect the reciprocating tl'Ur head lit to the rotary crank disks &3. iii. by which the cross head is actuated when the shear mechanism is in op crati u'. Also mounted upon the top of the Itttt\tlltl extension 39 of the housings 5, is an apron plate it) having upwardly extending adjintable side guards ll. 41, on opposite. sides of" its top surface and having a prote tion t? on its under surface. forming the. cap portion of the crank shaft bearing 33. The apron plate in is provided with an opening or slot 43, through whirh the top oi piut'h roller 3;.

ing stands l7. 4?. the,.- tand.-,: i? being:

cured by the bolts in to the l t':u'l t*t-- li it. on opposite sides of the apron plate i The top or upper edge oi llit v-artit-a movable shear knife support it i\ pt'm idu t \vith lugs or bearings rocking arm 51 is pivoted shaft 52. and tin upper end of the r t-kin; arm 51 18 held in yielding engagement ith the nearing taee 53 on the wparator n by the eye bolts 54 and springa oft on the outer ends of these bolts. as is best shown in Fig, 7 and The upper end of the arm Iii i provided with a removable ewing plate 56 forming the Wiping tare for thts'avui and also forming a stop which t ng-ages vvith the shoulder or jog formed in the eurved \vip' iug face 53 by the hardened invert \veat ing plate :17 removabiy hLCttl'Q i on the epa rat'or or spreader H, in causing positive movement of the top shear knife it) through (See Figs. i

its downward cutting stroke. 7 and Located in the reeess formed in the \viping t'at'e ot the separator H by the oppowite horizontal tart-s ot' the removable plat s. .37. and ST. in the vertically extending wiping face 58 on one end of the i'iorizontallv inov able trigger tion, (that shown in Fig. forms, a nontinuation ot the curved wiping tare 52% by whieh the upper end of the rot-hing" ariu St is held out of operative engagement with the shoulder or jog formed on the eeparator 8 by the hardened insert or plate .37 when the trigger 38 is retracted. The {are .rt on This face 58. in one posi l. 43th to \vhirh thrby the pin or the trigger 5S. \vhenretratrted by the sprin 59, (into the position shown by Fig. 7) pew nuts the wearing plate 56 seeured on the up per end of the rocking arm St to operatively engage with the islitlllltlQt or jog formed by t ward movement of the top shear knife 20 and its support L51 on the t'ttis'S-ll tltl l3 to ward the bottom shear ltnittli through the euttiug stroke of the knife 2t). iluring the last part of the ann: forward mot tueut ot the ertjiag-head t3 the vrrtit-ail extendin roeking arm 51 eont'aets with the wiping plate a on the t face of the Wearing plate and rauw; the t which lot-ma aurt'aee of the wearing plate ta -e vi ol the rparator ha\ in: meanwhile been in tinuotn y the return of the pi ing; ton the movable trigger 58 into the ii oiltwll vhocvn in Fig. 1. I 'l hth liwai own; All on the trigger as 75, l. in tired tw'tiv' u a removable rollar b0 n the, t: l wilt lane of the rere; or ipeuiugi iator l'ot'uu'd the hos-l o log t' p 1 vhivh the outer end of the Hi ge: e:\teuu--. -o a in n rmally hold V 11w and it. wiping tare in the re ra twl p ititui -houu by l i' o t," vvhit-h are rur 'd to the leaving and Qeparator b on the trout or l- 'li;% t;, 't= -hot' th .--hear. is a horizontal li3 1 hav ng; removablv net'lli't"l on one end tlmreot a detat'hable titni d ll bv irh intervah betvwen the tlltit str lo {il th --hrriv lililH'F are regln lated and t'outrottwi. l\ t' ve\l or otherwise ""tl2 l n the hal't "1 :1 ranhet' vvheel 4.1.3. and ltatt-i' 't lllttl on the hult til) i a rat 'het lever to l tt -i!;;j a pan] HT \vhi h i5 arranged to engage with the eeth ot' the ratrhet \vh el it and llltllt' the ratt'het vvheel 1; and -halt oi, by a -tr-pb v tep movement when the ratt'het arm or lever titi l h'littl or o.-t'illahl. t'onneetetl to the upper end ol the Iuub t lt'M't' i t by the ri-awhu'od r iinlt i the upper end of the o arm or ltWt't' til tllirtll'lll buing' pivoted at an interint liattpoint in ite length by the pin T0 to the lug; T. on the top ot' one of the houriings, .3 "htloner end of the lover or arm t3!) i5 pivotallv tt lllilt' itl by the tint; T2 to the hoii/mutall movable tttiHS-lltilti i so as to at-tuate the ratvhet lever i when the lever It) i roeltod by the reriprotutiug movt tut-ntfof the t'ro --ht':ul and. by a hep-b tep movement r tate the hal't of, and tho int! (link til. o a to u- --e i\t'l v hri g the ILt'th-tr-. or nob-hem ii: on the p ripht-i v ot' the timing dish 14 oppmite the end oli the trigger 3H and rituathe trigger 58 to be retrawted to form the bottom ou'l'aee ot' a 15 gap or ltttFH in the wiping fare on the r-t]\' rator. (the po:-itiou ahmvn in Figs. 13 and T). and. on the next torxvard movement of the crom liead name the lu'ar knives to on 'rutivel v approarh through the t'utting movement of tlttrt knives.

guard or shield if adapted to be moved into and tut! ot the path of movement of the rat-b t pawl UT on the ratt-het lever tvt'i i provided to prevnut tn ghtniai ot the pavvl with the treth ot' the i'att-het \Vllttl when interpmetl llttV-ttl't tht end til the pavvl HT and the periphery of the ratchet wheel (35, 'lho ."-llltl(l 75 i seeured on the upper end of one arm 76 of the double lever "the stop. to

disengage trout the shoulder or og ruled by th awn 37* so it: to thereby reh tht- :h'vr aim 3t. whit-h arm is th n "with the ltnit'e: otpport it which is loosely mounted so as to rock on the ratchet shaft 63. The upper end of the other arm 76" of the lever 76 is connected to one end of. the link 77 having a projection 78 on its lower edge and having its opposite end connected to the free end of the rocking arm 79. The rocking arm 79 is secured on one end of the rocking shaft 80, which is mounted in the lug; S1, 81, on the front face of the housings o and separator 8, and a stop 82 is provided on the lever 79, which by en gagement with the face of the separator 5 limits, in one direction, the rocking movement of the shaft. ()n the opposite end of the shaft 80 is a lever 83, the lower end of which is operatively connected by the link or rod 84 to the lever 85 which is secured on one end of the shaft 86 mounted in lxtarings secured on the apron plate 88, and on which shaft the counterweighted lever 85) is so cured, this lever being adapted, while depressed by a piece of material passing to the shear, to hold the shield 75 in inoperative position and when released permitting the link 77 on the bring the shield 7.5 into position to prevent further movement of the ratchet wheel or by the ratchet pawl (37.

Secured on the brake wheel end of the shaft 63 is a ratchet wheel (33 and a ratchet lever 90 is also mounted on the shaft (S3 having a pawl 90 arranged to operativcly engage with the teeth in the ratchet wheel (53 and when necessary rotate the shaft (33 and disk 64 to adjust or vat the time intervals between any two cutting strokes of the shear knives, and to adjust the position of the timing disk 64 on the shearing mechanism after placing a new d sk on the disk shaft 63.

The periphery of the disk (it is provided with a series of notel'tes: or depressions 78 spaced at regular intervals and one end of the trigger58 having the wiping face 58 is adapted to enter these depre sions whennot engntging with the periphery of the disks between the depressions. The particular disk (34 shown in the drawings is provided with equally spaced n tches I in its periphery so that when the end of the trigger .38 enters one of these in chest 73, the wiping face 58 on the other end of the trigger is retracted by the action of the spring .59 and the end of the arm 31 i permitted to engt'tgc the shoulder formed by the insert 57 on the separator 8 and cause the top shear knife 20 on the cross-head 1 3 to positively ntove through its cutting stroke six times in one revolution of the disk (it. A series of such disks, ea h Having a ditl erent number of notches in its periphery are provided and, by placing ditl'erent one of the various disks on the shat't 62% the number of times the movable top shear knife is positively actuated in one revolution of the disk 6-1 is lever 76' to be lowered to ehangedand in this way the length or one is cut is varied. The trigger 58 by engageber of pieces into which the rolled material ment with the periphery of the disk between t the notches is moved horizontally so as to shift the position of the wiping face 58 of this trigger from its position, (that shown (in Fig. 7), in which engagen'ient between the l wearing far-es 5t) and 57 is permitted, into its wiping position, (that shown in Fig. 8) by which the wearing fat-e 56 is held out of engagement with the shoulder or Stop formed on the separato d by the wearing face or insert 437* and pr -.tive movement of the upper shear knife toward the lower knife through the cutting stroke of the knives is prevented.

The timing disks G4 are provided on one face with a series of equally spaced pro'ecting pins, the number of pins in the isks equaling the number of depressions or notches 73 in the periphery of the disks, these pins being provided to engage with the projection T8 on the end of the link 77, so as to lift this link and, through The pins are positioned periphery of crattve position. relative to the notches in the the disks in such manner that the is moved into position between the ratchet pawl 67 and the teeth of the ratchet wheel, so that when retracted on the first movement of the ratchet wheel notch in the timing diskwill be brought opposite the end of the trigger 58 so as to permit the trigger to be retracted and on the next forward movement of the cross-head, cause the shear knives to be positively moved toward each other through their cutting stroke. In this way the front erd of the successive blanks are cut off or cropped,

with a minimum waste of material.

A brake wheel 92 on the shaft; 63 is adapt ed to be engaged by the friction face of the lever 93 which is pivoted by one end to the shaft 94 which is tIlOllIltQtllIl holes or bearings in the lugs ht) on the housing 5 rovided to prevent rotation of the shaft 63 by. friction, the counterweight 95 on the free end of the lever 93 holding the lever 93 in engagement with the brake wheel 92 so as to prevent rotation of the ratchet wheel 65 and shaft (53, except when positively actuated by the ratchet pawl 67 on the lever 66.

It is frequently found necessary or desir-- operation of the rolling mill I the con-- necting gear, shift the guard into its opguard 75 able to change the rate of speed at which the by the pawl, a

)ro )OI'tlOIlGd to suit the relal l i and shear. The oppositely facing cone pulleys 96 and 97 which are onne ted by the belt 98 to form a variable speed driving mechanism are employed to vary the speed of operation of the shear relative to the speed of the driving shaft 99 on which one of the cone pulleys is mounted, and a belt shifter is provided, which, as shown con sists of parallel screws 100, 100, having mounted thereon screw threaded supports 101 on which idler wheels or pulleys 102 are secured which engage with the top and bottom side of the belt 98. he idler pulley 102 which engages with the under side of the belt 98 is yieldingly held in engagement with the belt by the counterweight 101 on one end of the pulley support 101 mounted in the screw 100. The screws 1 00, 100, are connected together so as to operate in uni son by means of the bevel gears 103 and connecting shaft 104 and a suitable hand wheel 105 is secured on the end of one of the screws or shafts 100 so as to operate the belt shifting device to change the position of the belt 98 on the cone pulleys 96 and 97 to vary the speed of the driven mechanism. 5

It will be found desirable in cutting some classes or sizes of materials requiring frequent adjustments of the position of the belt 98 on the cone pulleys 96. and 97 to replace the hand wheel 105 with a gear meshing with a similar gear on the armature shaft of a small-electric motor and locate the controller for this motor in position to be operated by the person controlling the operation f the feed table delivering material to the shear tobe sheared.

On one end of the driving shaft 99 is a driving pulley 106 which is connected by means of a cross belt 107 with a pulley 108" mounted on one end of the shaft 31 by which the bottom pinch roller 32 is posi tively rotatedL-J \Vith my improved apparatus, approach of the shear knives into cutting engagement is prevented when materials are not being delivered to the shear, without stoppage in the operation of the shear driving mechanism, the driving mechanism being permitted ordinarily to operate while the rolling mill is being operated, so as to reciprocate the cross-head, in order to prevent any delay in again starting and stopping the shearing operations. For this reason, the pivot ed lever 59 having its front end extending upwardly through an opening in the bottom of the apron plate 88 is pivoted to the apron plate and a counterweight 88 is also provided to normally hold the outer end of the lever 89 in the upward position shown dotted in Fig. 4-.

The operation of my improved apparatus is as follows: The proper timing disk 64 to cut the metal blanks into pieces of the desired length, is placed in pol sition on the ratchet shaft 03 and the belt i .109 ishi fled from the loose pulley lllto the fast pulley 111') on the cone pulley shaft 99 o as to start the variable speed driving pulleys. 90. 97, in opt-ration, and. through the cf-nuccting uieclmuism. cause the cross-head l-l to reciprocate on the ways or slides l0, l7. and the frietirn rollers 32, 44,'to rotate. vvhen desired, the ratchet pawl guard may be manually moved into and held in its retracted position by means of the lever 83 so as to pcrmitthe ratchet pawl 67 to actuate the ratchet wheel (35 and shaft 63 to move the timing disk (31 and bring a notch 3 in the periphery of this disk into such position relative to the end of the trigger 53 that on the next rocking movement of the ratchet lever 06 a notch 73 on the disk 64 will be brought opposite the end of the trigger. The trigger then moves into the position shown in Figs. 3 and 7 by the force of the spring 59, so asto retract the wiping face 58 on the other end of the trigger 58 from the position shown in Fig. 8 to form a gap in the wiping face on the separator 8, (as is shown in Figs. 3 and 7). The partsare then in position to actuate theuppervertically movable'shear knife through its cutting stroke into cutting engagement with the bottom shear knife when the ratchet le ver 66 is rocked once more, and again move the ratchet wheel 65 and bring the notch 73 in the disk 64 opposite theend of the trigger 58 into the position shown by Figs. 3 and 7. Preferably. however, the timing disk 64 is more quickly moved to bring a notch in its periphery into the desired position relative to the trigger 58 by means of the booster formed by the ratchet wheel 63 and ratchet lever' 90 and pawl 90. When a multiple length blank delivered on the feed table from the bull head rolls apprcaches'the shear, the forward end of this blank first engages with and depresses the projecting end of the pivoted lever 89 on the apron plate 88. This lever, through the shaft 86, arm 85, and linkf8 l, moves the arm 83, and through the shaft the arlIF'79, so as to shift the guard 75 fro mits operative positiontshown in Fig. 8)..int6*i ts inoperative position (thatshown in Fig $1 and permit the free end of the pawl 6? 0n the ratchet lever 66 to'enga e with th'o'teeth of the ratchet wheel 65.; e next forward movement of the cross-headm whic stantly reciprocated; moves fth wheel 65 through the 1evert39.,r f and lever 66, and, through A the timing disk 64 into position s as mit the spring 59 to move the trigger the osition shown .in .and 7. It shou d be stated that, as'shown in Fig. 3. the cross-head 13 is at its extreme limit of forward travel and that the upper end of the arm 51'is in its lowest position, traveling 13') upward 0n the wiping face of the separator 8 into the position shown in Fig. 8, during the backward or left to right stroke of the cross-head. On the next forward stroke of the cross-head, (from right to left in Fig.

3) the*wearing plate 56 on the end of the arm 51 enters the gap then in the wiping face on the separator 8 as shown in Fig. 7, and engages with the shoulder formed by the wearingplate57 on the separator 8.

On the continuation of this forward stroke of the cross-head the top shear knife 20 is forced downwardly into cutting engagement with the bottom knife 19 so as to sever a late ,or other shape between the shear Ives.

As long as a plate or bar is passing over the apron plate so as to engage with and keep the free end of the lever 89 in its depressed position (that shown by full lines n Fig. 4 the lever 79 will hold the link or latch 7 in its liftedposition (that shown in Fig. 7 and maintain the guard 75 in its inoperative position so as to permit the ratchet pawl to engage with and rotate the ratchet wheel 65. After a cutting stroke of the movable shear knife at the beginning of the next forward movement of the crosshead, the cross-head, through the ratchet connections actuat/es the ratchet wheel so as to move the timing disk 64 to shift the tri g ger 58 into'tlre position shown in Fig. 8, in which position it remains until continued reciprocations of the cross-head rotate the timing disk sufficiently to bring the next notch in the periphery of the disk opposite tothe end of the trigger 58 and permit the trigger 58 and wiping face 58" on its one end to again be retracted, andagain cause a cutting movement of the top shear knife. During the interval in which the timing disk.

exact length desired the variable speed drivv ing mechanism formed by the cone pulleys 96, 97, is adjusted so as to change the relative speeds of the shear mechanism and the feeding device formed by the pinch rollers.

' After the rear end of ablank being sheared has passed beyond the projecting upper end of the lever 89 located in the opening through the bottom ofthe apron plate 88 this lever will be lifted by the counterweight 88 and tl'rrougl'nthe connecting lever arms and rods will permit the forward end of the latch 77 to again assume the depressed position shown in Fig. 8. The cross-head bein still reciprocated continues through the lever 69 and connections to rotate the ratchet wheel and through the ratchet shaft 63 the timing disk 64; As the disk fi l-is 'rotated one of the pins 64 projecting from the side of the disk engages with the projec tion 78 on the swinging end of the latch 77 and after engaging with the latch on the next movement of the ratchet wheel, moves the latch 77 and through the latch the guard 75 into the operative position of the guard between the teeth of the ratchet wheel 65 and the pawl 67 so as to prevent further movement of the ratchet wheel by the ratchet pawl 67 until the guard is thrown back into its inoperative position. The crosshead 13 then continues to reciprocate without cutting movement of. the shear knives until after the latch 77 has been lifted by the lever 79 into the position shown in Fig. 7. Thislifting movement of the latch is effected by the next rolled plate delivered to the shear when the forward end of the plate engages with and again depresses the end of the lever 89 in the bottom of the apron plate 88 which is located on the rear receiving side of the shear mechanism. The above operations are 1 -en repeated as required. 4

The advantages of my invention will be apparent to those skilled in the art. The apparatus is simple and is easily kept in repair. Byits use a long rolled metal plate 'or other shape is quickly and accurately cut into a plurality of equal lengths without stopping or delaying the forward movement .of the material being cut. The length into which the materials are cut is readily changed, and variations in the length cut quickly adjusted without interruption to the shearing operations.

Modifications in the construction and arrangement of the parts may be made withk out departing from my invention as defined in the appended claims.

I claim 1. In a flying shear a pair of opposed relatively movable shear knives, a movable shear knife support upon which said knives are mounted having mechamsm to cause a relativeapproach of thQ lUIIVQS during for-.

ward movements of said support, means for positively moving the support, and means whereby relative approach of the shear knives during forward movements of said support is prevented. I

2. In a flying shear a pair of opposed relatively movable shear knives, a reciprocating support upon which said shear knives are mounted, means for rcciprocating'said support to cause relative approach of the knives thereon, and means coacting with said support to prevent relative movementof the shear knives during at least part of 1 gee the' reciprocating movements of saidsupport. a V

3. In a flying shear a pair of'shear-knives relatively movable vertically, a horizontally movable shear knife support .upon which said knives are mounted, means for moving the support to actuate therk'nives, and means cooperating with said {support to permit; horizontal movement of the support without relative vertical movement of said shear knives.

4. In a flying shear,a pair-of opposed relatively movable shear knives, a reciprocat-ingsupport therefor, means for reciproeating the support without relative movement ofthe-shear knives mounted thereon '53 Shearing n'iechanism comprising op and mechanism for causing a-relative approach of the'shear knives to sever materials between the knives at intervals in the reciproeatory'movements jot said shear-knife support.

- posed 'relatively movable Shear knives, arec'iprocating supportf therefor, means for causing-relative approach .of said knives on the knife support msevering materials located between the knives and means for timiing the'interv'als between the severing movements ofsaid knives.

Gi Shearing mechanism comprising opposed relatively movable shear knives, means'for causing relative approach of said knives in cutting, controlling mechanism for regulating the-intervals between the cutting movements of'sai'd -knives, mean s'f or deliver;- ing material to be cut into; position between the shear knives, and echa'nism; engaging with fth'e uncutmater shear knives arrangedjt 40" i '7. Shearinggmechanism icomp'rising op herear of intain the con trolling-mechanism? in -op, atlve positionir-posed 'relatively mamma shear -kmves,

, means for causing relative approach of said.

i knives in cutting, controlling mechanism for V movements of said'knives, means for deregulating the intervals between the cutting livering' material to fbe cut into oposition between-the shear kmves, and mechanism en gaging with the uncut material in the rear means for causing relative'approach.oisaid of the shear knives arranged to maintain the controlling mechanism in operative position when" said material engaging'mechanis'm'is in contact with-the materials being cut.

8. A shearing mechanism comprising opposed relativ'ely movable shear knives,

knives in cutting material located between the knives, mechanism. for timing'orthe in terva'ls between the cut-tingjmovegnent of said'knives, means fer delivering material to" be cut into position between the shear knives. means engaging with 'the material being cutarranged to maintain the timing mechanism 1n operative posit on, and meansi new '7 for{ehangingtherate of feed of materials bctween the shear knives relative to the cutting move'mentsof said shear knives to vary the length of thepieces into which the materials are severed.

9. A shearing mechanism comprising opposed relatively movable shear knives, means for causing relative approach of said knives in cutting matetial between the shear knives, means for timing the intervals between the cutting movements of said knives, and mechanism operatively engaged by the material in the rear of' the shear knives while being cut arranged tostop cutting movements of the shear knives while the tion between the shear knives.

10. Shearing" mechanism comprisinga cross-head having opposed shear'='-knives' mounted thereon, means for re'ciprocatin the cross-head to cause relative approac 8E- of said knives in severing materialbetween said knives, and mechanism arrangedtoprei ventrelative movement of *saidshear -'kn1ves while said cross-htaad is beingreeiprocateda cross-head having opposed shear-knives mounted thereon means for-reciprocating? *th'ec ross-head to cause a relative approach pf said shear knives in severing materlatl K 4 and mechanism arranged to permit-the r-EQS ciprocating" movement without relative ,movement toward each otherof said shear? knives. 1 12. A shear comprising opposing- 'shear'i. lknives relatively movable toward and a WayJOf; from each other, a horizontallymovable cross-head on whicl1"-said sheanknivesFare," gnounted, means for reciprocating said crease; fhead, means for intermittently causing a relative approach of'said shear-knives when said cross-head is moved hori'z'ont-ailly in-one direction, and independent means arranged to retract the shear 'kni .es" when the cross"- head is moved in'them vosit directions 13; A- shear comprising opposing kni'vestllfi having a relative vertical cutting movement, ,a horizontally reciprocating support-ton which said knives are mQunted-tomovetherewith? means for causing arelat-ivempf-f; proaith ofsaid knives when the knife-sup 11! 'portsis reciprocated, means for reci'proc'atihg said support, and means forpreventingrela= tive approachof theknives at intervals ,gwhile said support is-being reciprocated.

{relatively movable shear knives, arecipi icating support therefor, means for recip ica't-ing said support without causing a rem-4- gtive' approach of the shear knives, mechanism khives when the knife support reciproicated" in' zseverihg material between said knivesand meansfor regulatiiij the -inter-''' material to be cut is being moved into posi- -80 V 11. Shearing mechanism comprising 9x90 14. In a-flying shear a pair of'op'posed lzo" for causing a relativcapproach of said sheet vats between cutting movements of said ives to regulate the cut length of the materia 15. In a tiying shear a pair f opposed relatively movable shear knives, a reciproeating support therefor, means for recipr .catlng said support without causing a l-elative approach of the shear knives, mechanism for causing a relative approach of said shear knives when the knife support is reciprocated in severing material between said nives and means for regulating the intervals between cutting movements of said knives to regulate the cut length of the material. \gulatmg means =1: removable to permit change in the length into which the material is cut. 16. Ina flying-shear, a reciprocating crosshead, means for reciprocating said crosshead, a fixed shear knife mounted on said cross-head, a shear knife support movably mounted on thecrosshead, ing arm piv'otally secured on the support, and a stop engaging with one end of said arm to move the shear knife support and movable shear knife to sever material between the shear knives when said cross-head is reciprocated.

i 1 In aflying shear,areciprocating cross-' reciprocat ng said crosshead, means for mounted on said head, a fixed shear knife cross-head, a shear knife mounted on the cross-head, a knife actuating the support, and a stop engaging with one end of said arm to move the shear knife support and movable .bross head, a shear k shear knife to sever material between the shear knives on the forward movement of.

said n eross head. I

18. In a flying shear, areciproca-ting crosshead, means, for reciprocating said crosshead, a fixed shea'r'knife mounted on said ni fe support inovably mounted on the cross-head, a knife actuating-arm pivotally secured on the support, a-

stop engaging with one end of said arm to head,;a fixed shear knife mounted. on said the shear knife support and movable'shear knife to sever'material between the shear knives, said stop having a movable wiping B and means for with the one end of the face contacting moving said wiping face to a knife actuati prevent operative engagement of the arm with said stop at pro-determinedintervals. 20. In a flying shear,areciprocating cross head, means for reciprocating said cross-, head. a fixed shear knife mounted on said ,cross-l'iead. a shear knife support movably I- mounted on the crosshead, a knife actuatmg arm pivotally secured on the support,-a

' and movable between the mounted on said support movably stop engaging with one end of said arm to move the shear knife support and movable shear knife to sever material between the shear knives, said stop having a movable wiping face contacting with the one end of the arm, means for moving said wiping face to prevent operative engagement of the arm with said stop and means for yieldingly wiping face.

22. In a flying shear, a reciprocating crosshead, means for reciprocating said, crosshead,

ing ann pivotally secured on stop engaging with one end move the shear knife .shearknife to sever material between the shear knives, sai d stop having a movab' wiping face contacting with one end of the arm, means for moving said wiping face-to prevent operative engagement of the arm said stop for predetermined periods of time, and means for starting the cutting opshear.

shearing comprising for. causing terial delivered to the 23. Apparatus for opposing shear knives, means relative approach ofsaid knives means and mechanisms being arranged to operaate without interruption in the delivery of materials to the shear knives. 4 24. Apparatus for shearing comprising stop engaging with one end of said arm to for reciprocating said cross-v holding said arm in engagement with said the support, a. of said arm to, support and movable erations upon the successive pieces of ma- :3

with

opposing shear knives, means for causingl relative approach of said knives in severing materials between the knives, mechanism controlling successive cutting movements of s"i(l knives, means for delivering materials a between said shear knives and mechanism 5 for regulating the cutting movement of said shear knives relative to the speed at which materials are delivered to the shear to vary 5 10 the cut length of the materials, said several JAMES SIMPSON.

Witnesses JAs. P. DAVIS, RALPH E. PonTER.

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