Патент USA US2130373код для вставки
Sept. 20., 1938. 2,130,373 J. L. ANDERSON TEMPLATE FOLLOWER Filed July 10, 1937 'm g. 215 ‘ ,10 INVENTQR A ‘ 7 V ATTORNEY Patented Sept. 20, 1938 2,130,373; STATE-Si‘ PATIENT" 6F I‘ZCJEZI 2,130,373 I TEIVIPIJATE 'FOLLOWER.v - James L. Anderson‘pclosteni N. J., assignor to‘ Air‘LReduction Company, Incorporated, I New‘ York, > N -. Y.-, a corporation of New-York '. ' Application-July 10, 1937, Serial No. 152,958 17-- Claims; \ (Cl.:33—23) inventionrelates to‘ terrip’l'ateefollowers. It*‘i's“an“obj'ec't of the invention'to. provide an" improved‘;template-followerv ‘which’ automatically follows"‘ternplates'~ of ‘irregular .shape' including 5 curves-"of rela't‘ively' "short" radii. The invention comprises‘novelrfeatures"and combinations of" ele ments which? make the’ template-follower simple and‘5-‘econ‘oinical to“ manufactureand convenient to use.‘ 10 - In‘ia'cc’ordance’with onefeatur'e of the‘invention a follower roller’oiran‘inclined‘ axis rests on the than the rack so that ‘the sleeve can move up and downa ,A pinion, 2d,. on an axle 22 rotated, by a hand‘éwliee'l' 23',l‘m“eshes‘ With? the rack ‘ I T and serves‘ to" lower‘aridf raise thesleev'e I51 when the'template-fcnower ist'o‘ be‘ moved into or out. of Contact withia template. The upper part of‘ the ‘ t'e'mp‘la'te-follcrv've'r~ is‘ similar to’ known tracers and aidesc‘ript'ioniof it‘is'not necessary'fora c'om plet'ei understanding‘ of this" invention; Tracers of suchfconstru’cti'onlar'e'z‘shown in Patent No‘. 2,059,755; dated November“ 3, 1'936;.and Patent top? face-of‘ a-templat'e and’ is‘rdriven to cause it . N0. 1,999,‘85'5,"dated’ April‘ 30, ‘193.5. to travell ‘along’ thetemplate; and‘guide means The lower end of the sleeve i5 is of ‘reduced? are-provided"fori'causing the" follower roller to ' stay*~on=' me~~ to‘p_—_ face" ‘of 1 the‘ template around curves-in either‘direction‘ as well°as along straight run'sé ; Another ‘ objectof ' the‘invention" is~ to‘ pre vent5 the guide“ means‘ from' binding against the side's'so'fet e"=tem'plate"o_n"sharp curves. 20 Othe'rl‘oh ct's,*fea'tnres ‘and advantages ‘of the invention‘will3 appear 'ori-b’ewpointe'd out as the speei?cation1= proceeds.’ ~ In‘? the accompanying‘drawing', forming part vFig;- 1L i'sias'ectibnal» view of ‘ a template-‘follower emliiodtiihghthe inventionrj ‘c "is? an elevation‘ of thelower‘part of the surface of the'sl'e'evei l'5“which s'lides'in the bear ing'l'lv'ij During" operation" of the‘ template-fol lower‘thesle'evejl‘5=and"frame M are’ free to move up andido'wn with a’flo‘atin‘g'action'inresponse'to any‘irregulariti‘es in‘ the supporting‘ surface along ' whi'ch‘th‘e template=follower runs?‘ templatee-follower‘ of'lFig‘. 1‘, looking toward the" A“-'tern‘plate-follower roller‘j2'l. is secured to the endiv'ofralslopingaxle 28"that rotates in anti-' Fig. :37 isi 'a---fr‘ag-mentary* sectional‘ view‘ similar , frictioirbearin‘gs" 29;“30‘11'eld by vthe frame 25.? A bevel gear 32 keyed to the axle 28 near its upper to Fig?" l'biit-lishowingma'modi?ed"form of the invent'io -' Fig'sif-ll andl 51am elevations of other modi?ed ‘ forms of the invention. 35 diameter andextends'iint'o a housing or frame 25. 'Th‘eupper end of theirame 25 has a sloping annular‘. faceviihi'c'h contacts with‘ an undercut shoulder‘ZBi on'the'sl'eeve; The housing or frame‘ 25 rotates Ton .the‘sleev'e l5‘ as a bearing and the outs'ideof the upwardly] extending ‘end of ‘the frame‘ 25*fo'rms a continuation‘ of ‘the outside 20 , 7 bracket‘ :l Q'iwi'th ai-s'crew ~ -I ‘l3 for clamping (it to a end‘ meshes" with a‘ ‘bevel gear ‘33:- fastened~v to" the lower” end" of" drive‘' ‘shaft ‘35: The‘ ‘frame 125'zia'nd"sleeve“l 5?v ‘are 'held assembled ‘ by ai-collar 3T6‘bn the" drive‘ shaft "351 This‘collar supports“- a?bal‘lib‘earing' 33 inwhich ‘the shaft’ ‘3 5'. turri's_;>'_ and-"the ball' ‘bearing ‘thrusts ‘against a universal cutting machine." With‘ shoulder 34 lathe-frame’ 2'5 and‘ keeps the'upper'" avin'g' .foldi-n'gi parallelogram " frames end' 'of"-the"frame“in"coritact; or substantially. so, the torch isxs'upportedllfr'om the’iront-bar and‘ partakes of the same mover-ment-x a's a‘tracer or with‘1 the undercut" sho'uld'e'r' "26 "of' the sleeve‘; The axis-cf rotation‘ of the'frame 25 about the‘ template-follower clamped to the bar. The in sleeve‘ 6'5"istcoihcident'with"the‘axis of the drive‘ ventionristnoh 'limit'ed' toli~machlnesv of‘ the folding shaft 35, and the point‘ of‘tractionof the roller ‘ paral-le‘lograml'stype, however}: and’~ the bat-P12 is 21 on-a'te'mmate ~3’l- is‘in line wit'hthe‘axisof the ' barlc'?'niof machines 1 40 representative‘ of-i. as universal cutting machine fr'amegwhich isrto :bev moved in?- accordance with the :o‘utline-rofa-a template‘. Thetbracket‘ vHill-has: a- vertical-tubular- bearing l4 th'rough'rwhichka- sleeve l5 extends.- The shaft? 35.- Y The roller‘ 21' is prevented-from running oiT the‘. top face of‘the template 37‘by'guide means which‘ includesa'lower“guide roller '39‘,‘ atv the end of sleeve rl?v'is- freekto‘Islideiup'andwdown in'the bear- ~ the anew in position 'to*conta‘ct with‘one side. in‘g il‘?-"for 1a limited ‘distance but- is‘ prevented of the’ template, and ‘two other: guide rollers for" wheels “that contact with'the other side? of the" frOn-iLt‘urningFIcyia- rack I‘! which is ‘fastened template.“ The guideroller. 39"‘is'pre'ferably in" to thesl'eeve by'scre'ws I8 and extends: into a .tegrarwit‘h'the roller 21 and‘ axle‘ 28'but may-pa slot'l'9 in the bracket ID.’ This slot is in‘e?ect a keyw'ay‘ 'and- the1 rack IT a key to prevent the van idler rotatable independently. of the roller‘ 21;. In‘an'y' event some slippage of the 55 sleeve-‘from: rotating,‘ buttheslot I9 is longer andaxlet'28i' peri‘pher'y‘o'f the guide roller 39 on‘ the side' of the 2,130,373 2 template will occur because the different points on the surface of the guide roller are not equi distant from its axis of rotation and therefore travel at different velocities when the guide roller CH turns. This slipping is not objectionable, how ever, because the guide roller does not support the weight of the template-follower and has rela tively light contact with the template. The wheels 49 are preferably idlers and are supported by screws 4| from a swivel member ll) 42 which turns about a vertical screw 44 threaded into the oblique bottom face of a rod 45. That part of each of the screws 4| just above the head of the screw comprises the axle for the wheel 40 supported by that screw, and the large ?at 15 head of each screw 4| serves as the thrust bear ing which supports the weight of the wheel 4!). Rotary means driven by power can be employed in place of the wheels 40, but the additional trac tion obtained in this manner is unnecessary with most machines on which the template-follower of this invention is used. The rod 45 slides longitudinally in an inclined bore in the frame 25 but is prevented from turn ing by a pin 41 which is ?xed to the frame 25 and I, extends through a slot 48 in the rod 45. A coil spring 50 is pressed against the upper end of the rod 45 by a screw 5| which threads into the upper journaled in the frame 25'. A bevel gear 58 on the shaft 56 meshes with a gear 59 at the upper end of an axle 28' to transmit rotation of the shaft 56 to the axle 28'. Ball bearings 29’ and 30' hold the axle 28' at an inclination and there are a traction roller 21' and a guide roller 39' at the lower end of the axle. When turning sharp curves with the modi ?ed form of the invention shown in Fig. 3 there is substantially no epicyclic effect to increase or decrease the speed of the roller 21'. If the frame 25’ makes a turn of ninety degrees, the only movement of the gear 58 caused by the turning is a rotation through an angle corresponding to one quarter of the distance between teeth of the worm gear 55, and the angular movement of the rollers 21’ and 39’ is only slightly more, depend ing on the ratio of the gears 58, 59. Fig. 4 shows a modi?ed roller assembly which makes it unnecessary to have the wheels 40 to keep the traction roller on the template. In ad dition to a traction roller 52 and a guide roller 63 corresponding to the rollers 21. and 39, re , spectively, of Fig. 1, another guide roller 65 is connected with the axle in position to contact , ' with the side of the template remote from the roller 63. Since the guide roller 53 prevents the traction roller 62 from running off the template end of the bore in which the rod 45 slides. The ,to the left and the guide roller 65 prevents the pressure of the spring 50 yieldably holds the traction roller from running off to the right, . wheels 40 against the side of the template, and the wheels 40 are no longer necessary. ‘ Fig. 5 shows a template 69 which has a groove the reaction of the spring against the screw 5| acts through the frame 25 and urges the guide along its top face, and a traction roller ‘H runs in this groove as shown in the drawing. This roller 39 against the template. groove gives the roller greater friction contact 35 .One of the wheels 40 contacts with the tem with the template, and it keeps the roller from 35 plate a short distance ahead of the point of trac being displaced laterally of the template when tion of the roller 21 on the template, and the other wheel 40 touches the template some dis tance behind the point of traction. The distance between the wheels 40 is made short so that the 40 template-follower can turn curves of short radii. The spring 50 makes it possible for the wheels 40 to move either way, depending upon whether they are on the inside or outside of a curve, to allow for the curvature of the arc of the template between the Wheels 40. The guide roller 39 has line contact with the template along a vertical line and therefore does not bind when passing around sharp curves, as is the case with ordinary 50 Cir U! ?anged wheels. A slight speeding up or slowing down of the template-follower of Fig. 1 occurs when it turns sharp curves because of the epicyclic effect when the gear 32 rolls around the driving gear 33. The epicyclic effect causes the speed of the template follower to increase when the gear 32 rolls in the same direction that it is turning, and to slow down when the gear rolls in the opposite direc tion. This variation in speed is not enough to be objectionable with ordinary work, but when very 60 uniform speed is essential it can be obtained with the structure shown in Fig. 3. The upper, broken away portion of the tem plate-follower shown in Fig. 3 is the same as that shown in Fig. 1, but in Fig. 3 a frame 25' is slightly different in shape ‘from the frame 25 of Fig. 1 to allow for a different location of bear ings. Wheels 41' are supported from. a swivel member 42’ at the end of a rod 45’ which slides in‘the frame 25’. The parts in Fig. 3 that cor respond with parts in Fig. 1 are indicated by the same reference character with a prime ap pended. . A worm 54 at the lower end of a drive shaft 35' drives a worm gear 55 secured to a shaft 56 the follower is not in operation. When the roller ‘H is driven to cause the follower to travel along the template, the frame and other structure to 40 which the template-follower is connected and for which it furnishes the motive power has friction in its bearings and offers resistance to the move-, ment of the template-follower. As a result of this resistance the .gear 32 (Fig. 1) tends to ro-g . tate around the driving gear 33 to turn the frame 25 about its axis. Such a turning of the frame would cause the roller ‘H (Fig. 5) to climb out of the groove in the template 69, but such move ment of the traction vrolleris prevented by a guide roller 13 which is similar in construction to the guide rollers 39 and 63 employed with the embodiments of the invention shown in Figs. 1 and 4. I It will be understood that terms of orientation used in the description and claims are relative. The invention is not limited to the embodiments illustrated and some features can be used with out others without departing from the inven- ' 60 tion as de?ned in the claims. I claim? 1. A template-follower for a universal cutting or welding machine including in combination a roller for contact with a template, an axle about which the roller turns, said axle having a substantial inclination so that the roller tends to travel transversely of the template, a frame holding the axle, and a bearing on which the frame rotates, about an axis in line with a point of contact of the roller on the template, to change 70' the direction of travel of the template-follower. 2. In a template-follower, a frame rotatable about a vertical axis tovsteer the template-fol lower, anaxle carried by the frame, a roller on the axle in position to contact with a template 75 2,130,373, at a point in line with the axis of rotation of said frame, the axle being at a substantial, acute‘ angle to the vertical so that the roller tends to travel toward one side of the template, and a guide roller connected with the ?rst roller in posi-' tion to contact with a side of the template when the ?rst roller is operating along the top. face of the template. ‘ . . a 3. In a template-follower,a frame and a bear 10 ing on which the frame turns as the template_ follower changes its direction of travel, an in— clined axle carried by the frame, a template-fol lower roller on the axle in position to contact with the top of a template at a pointin'line with 15; the axis of rotation of the frame, a second roller on said inclined axle in position to contact with one side of the template and serve as a guide to con?ne movement of said template-follower roller transversely of the top face of the template, and template. 4. In a template-follower, a frame and a bear ing on which the frame turns as the template follower changes its direction of travel, an in clined axle in the frame, bearings in the frame in which said axle rotates, a roller secured to the axle at a location which puts the lowest point of the roller in line with the axis of rotation of 30 placement of the template-follower roller trans versely of the template. 5. In a template-follower for cooperation with a template having a longitudinally recessed top 35 face, a traction roller having a face which ?ts into the recess of the template, an axle for said traction roller, the axle being inclined with re spect to the template so that the traction roller tends to climb out of the recess toward one side 40 of the template, and a guide roller connected‘ 6. A template-follower including a traction a guide roller attached to the traction roller in position to contact with a side of the template and prevent transverse displacement of the trac tion roller, and yielding means which hold the guide roller against the template. 7. A template-follower including a traction ‘roller which runs on the top face of a template, a guide roller attached to the traction roller in position to contact with a side of the template and prevent transverse displacement of the trac tion roller, a second guide roller which contacts with the other side of the template, and yielding means for urging said second guide roller against the side of the template. 8. A template-follower including a traction roller constructed and arranged to travel along the top face of a template and having a guide roller directly connected with the traction roller and located in position to contact with one side 65 of the template at a set distance from the traction rollerytwo wheels in positions to contact with the side of the template away from the guide roller at points slightly ahead of and slightly be hind the line of contact of the traction roller 70 and its guide roller with the template, and means urging the wheels toward the guide roller to hold said wheels and guide roller in contact with oppo site sides of the template. 9. A template-follower comprising a frame, an axle carried by the frame, a traction roller on said axle having a substantial inclination so‘that - drive shaft and the roller. 11. In a template-follower, a vertical drive shaft, a frame, a bearing on which the frame 25 turns about the axis of the drive shaft, an in lower roller on the axle in position to contact with the top of a template at a point in line with the axis. of rotation of the frame, and two guide rollers on the axle in position to contact with opposite sides of the template to prevent dis 45 roller which runs on the top face of a template, and a swivel connection between said support and 10v the frame. 10. In a template-follower, a vertical‘ drive shaft, a frame, a bearing onwhich the frame turns about the axis of the drive shaft, an in clined axle in the frame, a templateefollower‘ 15 roller on the axle with the low point of the roller in line with the axis of ‘rotation of the frame, motion transmitting connections between the 25 clined axle carried by the frame, a template-fol from moving out of the recess. points slightly ahead of and‘ slightly behind the lineof contact of the traction‘roller and its guide roller with the template, a support for said wheels, the roller tends to travel transversely of the template, guide means for preventing transverse movement of the roller on the template, and 20 means for holding the second roller against the with the traction roller in position to contact with the other side of the template to prevent the roller 3 the axle in position to contact with ‘and travel along the top face of a template and having a guide roller attached to the traction roller in position to contact with one side of the template, two wheels :in positions to contact with the side of the template away-from the guide roller at the frame, said axle having a substantial inclina— tion so that the roller tends to travel transversely of the template, guide means which prevent the roller from running transversely and which hold said roller on the top surface of the template, 35 and gearing connecting the drive shaft with the axle. 12. In a template-follower, a vertical drive shaft, a frame, a bearing on which the frame turns with respect to the drive shaft and about the axis of the drive shaft as the template follower changes its direction of travel, an in clined axle in the frame, bearings in the frame in which said axle rotates, a roller secured to the axle at a location which puts the lowest point of the roller in line with the axis of rotation of 45 the frame, said axle having a substantial inclina tion so that the roller tends to travel transversely of the template, guide means which prevent the roller from running transversely and which hold said roller on the top surface of the template, and gearing connecting the drive shaft with the axle, said gearing including a worm on the drive shaft operating a worm wheel which has its axle sup ported by the frame. 13. A template-follower including a traction 55 roller supported for rotation about an ‘axis which has a substantial inclination, means for main taining the roller in contact with a template and the incline of the axis in a de?nite relation to the template, said incline being su?icient to make the roller tend to move transversely of the tem plate,‘ and apparatus for driving the traction roller. 14. A template-follower including a frame, a bearing on which the frame turns about a sub stantially vertical axis, an axle held in the frame, a traction roller on the axle constructed and arranged to contact with a template, said axle having a substantial inclination so that the roller 70 tends .to travel transversely of the template, means holding the traction roller against trans? verse movement with respect to the template and holding the frame against turning except in ac cordance with turns in the template, and power 75 4 2330;373 means connected withythe traction roller for. rotating 'said roller. ,:115.'A template-follower including a frame, a bearing on‘which -the ‘frameturns about .a sub1 stantiallyvvertical axis, an inclined axle held in the frame, roller means on the axle in position to contact with a supporting surface and with‘ an‘upstanding side of the template, said axle hav ing a substantial inclination so that the roller 10-? tends to travel transversely of the'template, .and means connected with the frame in position to contact'with‘ the side of ‘.the template opposite to that with which *said roller contacts to vhold the rolleragainst the template and-keep the frame 15? from turning except'in accordance with turns in the template. 16;.An automatic template-follower including, aroller having a‘facewhich ‘bears against a guid inglsurface ofva template,andrhavingv a friction face :constructedland arranged to bear against a surface which'is- at an inclination to the axis of rotation of the "roller to produce a tractive force having a component toward the'guiding sur face of the. template,.and power means for rotat ing the‘ roller. 1'7. In a template-follower, an inclined axle, and a roller on=the axle with two contact faces in such‘ relation that one ‘face rolls along an 10 upstanding guidingxedge‘of a template while the other l-faceisupports the roller ‘from? a substan tiallyv horizontal surface and supplies tractive force to the template-follower with a component of the tractive ‘foroem'ging the roller vtoward. the 15 guidingedge of the. template. JAMES L. ANDERSON.