US1437307A - Pantograph - Google Patents

Description

W. H. HOPE.

PANTOGRAPH. APPUCATION FILED MAR. 19. 1921.

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ATTORNEY Patented Nov. 2 1922.

W. H. HOPE.

PANTOGRAPH.

APPUCATION FILED MAR. 1 9. 1-921.

1,437,307. ent Nov- 28,1922.

4 SHEETS-SHEET 3- INVENTOFK ATTORNEY W. H. HOPE.

PANTOGRAPH.

APPLICATION FILED MAR. 19, I92!- Patented Nov. 28, 1922.

4 SHEETS-SHEET 4.

1 INVENTOR FIGG ATTORNEY Patented Nov. 28, 1922.

WILLIAM 1i, HOPE, or PROVIDENCE, RHODE ISLAND.

ranr emrm Application.filedMarch.13, 192}. SerialNo, 453,634,.

Toall in item tmasy concern;

Bedtlgnown that. I, l VI LIAM, Horn, a citizen ofthe, UnitedStates, residing. at. Prc i nre. a the c y oi, roviden and. Stateof llhode. Island, have invented new and useful Improvements in a'Pantog ljaph, of which the, followingis. a specification- This invention relates to. certain new and,

useful, improvements in a pantograplrand it has for itslprinoipal object to provide an improved. mechanism, and constructipn wherein. through electrical means the cutter orcuttersmay be. controlled by the. stylus and; its association v to and cooperation with the design, to, render said cutter or cuttersoperative and inoperative depending upon the nature of the contact. between the. stylus and. the design.

'fllhev invention further resides in: provid' ing a metallic design platecoatedl with an electrical resistance material so. as, to leave a design formed of this resistance material orto have the back ground formed of this resistance material, and the uncoated or ex;- posed portion of the metal plateconstituting the. background. or the design, respectively.

A further object of this invention is to pro vide, a machine havinga bedfonwhi ch. a me;

tallic design plate. has electrical contact, a stylus for movement over. or across the plate with portions of the latter coated with a resistance material whereby electrical circuit between the bed and, stylusv may be vmadev or broken according; to. the contact. of; the stylus with the uncoated or, coated portions of the plate, and electrical means. in cincuit with the bed and. stylus for raising the cutter or cutters from the work or permitting the n to become operatively disposed according to the particular contact being made by the. stylus.

The invention also hasforits object the provision of variable motion tna-nsmitti'ng mechanism between the stylus and the cutter support and between the stylus andthe work support.

The invention alsov is found to reside in an improved pantograph construction wherein the stylus and its carriage. is continuously reciprocated across the. design and has'associated means for advancing, or moving. the stylus carriage step by step. or intermittently in a direction.transversely with respect to the reciprocatory motion of the carriage wherey hesn 'r e i n will: en ally be r ced y h tyl siapamllehpre et rm ned.l nes.

F rth r, t e nventi reside in e. f are qns uc im and the arr gements and combinations of parts described in, 1Q- tail in .the followingspecification and su ccinctlydefined inthe. appended claims, ref

erencesbeing made to' the, accompanymg drawings v wherein,

Figure 1 isa'frontelevation of a pantograph constructed in accordance with the P s nt v nt ve a d embo y ng. he. m m vem n there Figure 2 is area-r el'eva-ticnthereof;

F 'l'gure -8 is an end view of the pantos apli;

Figure; .4 is a detailed side elevatien of a fragmental part of the mechanism empleyed. for advancing the stylus carriage p y p, 0. nter t e y w ereby the yl s laus d" tQ. rav l a andv fortlt across the a design inffresh paths F igure b is a fragmentary vie'win the side elevation showing the snap switch emp ey d'i;

Figure 6isa fragmentary end view of the pantograph machine looking from the op p sits ndw r m F ame Figure 7 is a detailed View of the tracing P int o the, sty us;

Figure S is a plan viewof the construc- 01. shown I F gur 4,

Figure 9 is. a similar view of the snap switch depicted in'Figure 5"; and

Figure 10 is .a fragmentary iew of an improved design'plate. i

Referringmore in detail to the drawings thenuineral 1 designates the base of the machine having side standards 2 surmounting the sagne for supporting the superstructure hereinafter described. Between. the StandardsQa pair of rails 3 are mounted on the base and run forwardly and rearwardly thereof, and supported on these rails by wheels i is a carriage 5 which in turn supports a superposed, wheeled carriage fi for transverse movement. A forwardlyextending stylus supporting arm 7 carries the 13, the latter being supported from a carriage 14 which traverses, on wheels 15, a track 16in the superstructure.

An endless band 17 takes over pulleys or wheels 18 journaled at opposite ends of the different planes to receive the respective upper and lower lengths of the band 17,

said magnets having detents so that when energized they will grip said band. The magnets areselectively energized in a successive manner so that only one will be operative while the other remains inoperative and by so successively engaging the upper and lower portions of the band cause the carriage 14 to travel therewith back and forth over the rails 16.

The successive or alternate operations of the magnets are effected through a snap switch 25 embodying a pivoted arm 26 and a coil spring 27 which acts to quickly move the arm in opposite directions from a dead center position. The outer end of the arm is connected to the opposite ends of a flexible wire or cable 28 which is supported on the wheels or idlers 29 and has its lower length passing through a guide tube 30, the opposite ends of which alternately engage fixed stops 31 adjustably carried by the wire 28. Obviously, as the carriage 14 moves in one direction, the forward end of tube 30 will engage its stop 31 and move the same along therewith for effecting a pull on the wire which swings the switch arm 26 toward and beyond the dead center position and thereby permits the spring 27-to reverse the switch for bringing the idle electrical magnet into play, and rendering the companion magnet inoperative, to cause a reverse travel of the carriage 14.

A drum 32 is journaled on the carriage 6 and is equipped with a toothed peripheral portion 88 designed to be engaged by a dog 34 to prevent retrograde movement of the drum, A cable 35 has its opposite ends secured to the drum and from there passes around pulleys 36 and 37, the same being journaled on vertical shafts on carriage 5, and on the upper end of the shaft supporting pulley 86 is fixed a pinion 38 that has meshing engagement with a rack 39 fixed relative to the base of the machine. 1-1 rack 40 is provided on carriage 5 and is traversed by a pawl 41 which is pivoted to an arm 42 carrying a friction pawl 43 that operates to intermittently rotate the drum 32 in one direction only.

hen the carriage 6 hasreached its limit of movement and reverses its motion, the dog or pawl 41 will lift the arm 42 and cause partial rotation of the drum 32 which will exert a pull on the cable 85 and thereby impart rotary movement to the pulleys 86 and 37. Obviously, rotation of pulley 36 will cause the pinion 38 to ride on the rack 39 and move the carriage 5 correspondingly rearwardly or forwardly. Thus it will be seen that each return movement of the carriage 6 will cause the carriage 5 to be advanced one step automatically until the stylus has traced over the entire pattern.

The pattern or design plate is preferably of zinc and has the design painted thereon with an electrical resist varnish. As an ex ample, the design 44 in Figure 10 is applied to the zinc plate by painting the resist varnish thereon.

Fixedly mounted on the superstructure or track 16 is an upright arm 46 having a ournal bearing shaft 47 which carries on its outer end a radially slotted wheel 48 and on its inner end a pinion 49, the latter meshing with a rack 50 carried. by the upper diamond bar or carriage 51. If two sets of diamonds are employed then the pinion 49 will also be meshed with the rack 52 carried by a lower or second diamond bar 53. Each diamondbar is supported on respective track sections 54 by rolls or wheels 55. On the wheel 48 are a plurality of knobs 56 adjustable radially in the slots thereof whereby the knobs may be formed into a circular series that is variable in diameter. The carriage 14 is provided at its opposite ends with uprights 57 and 58 the former carrying an adjustable screw 59 and the latter carrying areel 60. A wire or flexible member 61 has one end anchored to the screw 59 and its opposite end connected to the reel 60, the intermediate portion being looped about the circular series of knobs 56 so that when the carriage 14 is moved the flexible drive member 61 will rotate the wheel 48 and thereby impart driving movement to the pinion 49, rack 50 and diamond bar 51, or to both racks and both diamond bars when two are employed. By varying the position of the knobs 56 in their slots the relative movement between the diamond bar in carriage 14 may be accordingly varied. Thus, the transverse tracing movement of the stylus will be increased or diminished when reproduced by the diamond points 62 on the roll 63. Each diamond point or cutter 62 is under the control of an electrical magnet 64 which when energized will effect lifting of the diamond point from the roll.

The pattern or design plate 9 is grounded electrically into the bed 10 of the machine from which the circuit passes through wire 45 to the serially connected electrical magnets 64, thence through wire 65 to a battery 66 and then through wire 67 and switch 66 to the stylus 8. This circuit is such that when ithestylus comes in contact with the zinc plate 19 and therethrough completes the electro-ina'gnet CII'CLHt the magnets 64k will be energized to lift the cutters from the roll topreven't cutting ofthe varnish covercounter balance 73. The plate 72 is'pro vided ,Wltli a series of radial slots in which are adjustably mounted a series of knobs 74L aboutwhich; passes a flexible member 75 that has one end anchored by screw 76 to upright 77 and its Opposite end connected to a reelI'ZS journale'd on upright 79, said uprights being-carried on the forward and rearward sides of carriage 5. n a

Stretched between uprights '7? and 79 is rod 80 having ,a pair of adjustable stops 81 to be engage'dby an arm 82wvhich is ear riedbyithe shaft extension ot the snap switch .25. The purpose or function of the adjustablestops 81 is to contact with the .arm 82 to throw the switch inthe event the pull wire .28, by reason of the non-functioningof the stops 31, fails to throw said switch.

ln operationithe. motor 21, which maybe :01 any suitable type operates to mpart continuous *HIOVGll'lQIliZ to the belt or baml l7 and through the alternate engagements by themagnets QSand 2a a reciprocally movement is accordedithe carr age the lii'nits .ot reciprocation being determined by the position-fotthe stops 31. Through the connection 12and 13 the movement of car *iage 1% is transmitted to carriage Sand the stylus arm 7. Consequently the styluswill be reciprocated backand forth across the pattern or design plate and uponthe start or beginning, of each return inoven'ient of the carriage the pawl 41. actsto lift the arm 42,

swing under its pivot and permit lowering ,of the arm. which lOWGIlIlg movement will result in partially rotating the drum 32 to take up and let out thocz ble 35 which movement of the cable revolves the \Vliefili ii and 37 and. the pinion 38 to act on the rack The pawl ll will thus drag through thegreater part or each sliding movementof the carriage 6 and upon re versing this movement the pawl will swing from one side to the other oi its pivotal mounting and each time efiiect lifting oi the arm lQflYlllCll automatically lowers, aided by spring; 84, to partially rotate the drum. Hence itwill be seen that each sliding, more IUGiit or" the carriage i3 over a new or sii portion of the pattern or design. Furt ier- 39. .and thereby advance the carriage 5 inwardly one step.

j the bi more, each stepby step advance of thecar ria'ge 5 willimpart a proporti'onedte rotative' movement to the printing roll 68 by reason of the flexible member T5, which moves with said carriage 5 winding and unwinding about the series of knobs 74.. inent ot carriage 6 proportionately trans mitted through the diamond bar or bars through the carriage 1e, flexible member 61,

wheel &8, pinion 49 and. rack 50.' As the stylus traverses the pattern it will alternatoly ride over varnished and unvariiished sections and corresoondii'igly open and close the circuit, through magnet 64: to effect a low ring'and lifting or the diamond cutreproduced accurately onthe roll with lesser orgreater proportions depending upon the predetermined positioning of the knobsSG and 74; I

The current battery 86.- T he action of the stylus is such that in the course o't time it will move over the entire surtace'ot the design inpredetermined lines and tie action ot'rthe cutters will be underthe control of the stylus," being lifted during each reciprocation ofthe carriage 6' as many'times as the stylus rides oii' the varnished and lowered onto the roll as many times as there are portions oi varnished surfaces in its path. Thus the stylus through electrical means acts'to operate the diamond cutters either upon the roll or off the same-depending wholly upon whether the design, is

laid in with electrical resist or whether the design is the exposed metallicplate. The operation therefore is accurate since the cutters cannot act upon the roll unless thestylus is travelling over a varnished surface.

l-lavingthus described my invention, what I claim as new and desire to secure by Let.-

tersiPatent is 1- 1 1. A pantograph comprising a base, a bed thereon, a carriage movable forwardly and rearwardly on thebase, a styluscarriage supported on the first carriage and movable transversely thereof, a stylus supported on. the second carriage for tracinga design on v the bed, a superstructure on the base, a third carriage lilOVlllJlC on the latter in a direction similar to the second carriage, a grooved rail carried by the second carriage and extend ing in the direction of movement o lhe first carriage a bracketstructure on the third carriage having a part slidable on therail and connect the second andthird carriages ,tfor tr .nsverse movement, a contin uously operatingendless band, a pairot electrical magnets on the bracket having parts associatedwith the sectional-lengths of out and adapted to the ies} tive lengths alternately'ivhereby the second ri'ace portions ontothe unvarnished sur; ice, portions of the zinc plate,

The sliding ino've- 7 'ters 62. ()bviously then the patternwill'be i 85 p for magnets 28 andQ nay be. supplied through circuit wires 85 and a and third carriages will be moved reciprocatingly, an operating circuit for the magnets including a reversible switch and a switch operating member extending along side the path of moycment of one of the carriages,spaced stops on said switch operating member alternately engagcable by said carriage to effect a reverse throw of theswitch, a printing roll support, a fan shaped plate connected to the roll support andprovided with radial slots, knobs adjustable in the slots, a flexible member passing about the series of knobs and having its opposite ends secured to the first carriage whereby movement of the latter will be converted and transmitted to the roll support into rotary motion, a diamond bar supported for movement on the superstructure, and av variable transmission mechanism between the third car iage and the diamond bar.

2. In a pantograph, a diamond cutter, electrical means for moving the cutter out of cuttingposition, a stylus, a design embodying a metallic plate having portions of its surface covered with an electrical resistance material, and a circuit including said means, said design plate and said stylus, adapted to be closed by direct contact between the stylus and the exposed portion of the plate.

3., In a pantograph, a cutter, a stylus, a design plate of metallic body having portions covered with a resistance element, and

means for moving thecutter out of cutting position when the stylus is in contact with one portion of the plate and for permitting movement of the cutter to cutting position when the stylus is in contact with another portion of the plate. I

4. In a pantograph, a cutter, an electromagnet for lifting the cutter from its work, a stylus, a'metallic design having portions exposed for direct contact with the stylus, and an electric circuit connected on one side to the stylus and on the other side to the design and including said magnet.

5. In a pantograph, a cutter, a movable support therefor, stylus, means for converting the movement of the stylus into a different movement for the cutter support, and electrical means underthe control of thostylus for moving the cutter out of cut ting position. i

6. A pantograph comprising base, a bed thereon, a carriagemovable forwardly and rearwardly on the base, a stylus carriage supported on the first carriage and movable transversely thereof, a stylus supported on the second carriagefor tracing a design on the bed, a super-structure on the base, a third carriage movable on the'latter in a direction similar to the second carriage, a

grooved rail carried by the second carriage and extending in the direction of movement of the first carriage, a bracket structure on the third carriage having a part slidable on a switch operating member extending along side the path of movement of one of the ing member alternately engageable by said carnage to effect a reverse throw of the swltch, a work support, a cutter, and means for converting the movement of the stylus carriage into predetermined motion for the cutter. p

7. Apantograph comprising a base, a bed thereon, a carriage movable forwardly and rearwardly on the base, a stylus carriage supported on the first carriage and movable transversely thereof, a stylus supported on the second carriage for tracing a design on the bed, super-structure on the base, a third carriage movable on the latter in a direction similar to the second carriage, a grooved rail carried by the second carriage and extending in the direction of movement of the first carriage, a bracket structure on the third carriage having a part slidable on the rail and connecting the second and third carriages for transverse movement, a continnc-usly operating endless band, a pair of electrical magnets on the bracket having parts associated with the sectional lengths of the band and adapted to engage the respective lengths alternately whereby the second and third carriages will be moved reciprocatingly, an operating circuit for the magnets including a reversible switch and a switch operating member extending along side the path of movement of one of the carriages, spaced stops on said switch operating member alternately engageable by said carriage to effect a reverse throw of the switch, a printing roll support, a variable transmission mechanism between the roll support and the first ca "riage, a diamond bar supported for movement on the superstructure, and a variable transmission mechanism between the third carriage and the diamond bar.

8. In a pantograph, a stylus, a cutter, and means for transforming the motion of the stylus to that of the cutter, said means including a rotary member having radial slots.

a series of knobs adjustable in the slots, and.

a flexible member connected at its ends to one of said first two elements and having its intermediate portion looped about the series of knobs, said rotary member being connected to the other of said first two elements.

carriages, spaced stops on said switch operatand the support, a work support, variable transmission means between the'latter andthe carnage, each of 'said means including stylus carriage, the rotary members being 9. In a pantograph, a stylus, a cutter, and means for transforming the motion of the stylus into that of the cutter, said means said part. a e I 10. In a pantograph, a carriage supporting the same, acutter support, variable transmission means between the carriage a rotary member having radially adjustable projections and a flexible mei'i'ib'or-apassingabout the projections and COllIlGCtQClTIO the connected to the work and" cutter supports. 11. In a pantograph'a continuously 1nov-' lDgGITCllGSS band, a reciprocatory carriage,

electrical: means carried by the latter for alternately engaging the twotlights of the bandrto move the carriage back and forth, austylus connected to the carriage for movement therewith, and means for, advancingthestylus step by stopover a design as it is traced by its reciprocatory motion.

12. In: a. pantograph, a frame, a carriage movable thereon, astylus carriage movable "back and forth acrossthe: firstcarriage, and

means for advancingthe first carriage intermittently by and during reciprocation of the second carriage.

113;. In apantograph, a; frame, a carriage movable thereon, a stylus carriage movable wbackjand forth across the first carriage, a1,

fixed rack on the frame, a-pinion on, thefirst carriage cooperating with the rack toadvance said carriage, and. means for intermittently rotating the pinion.

14'. In a pantograph, avframe, a carnage movable thereon, a stylus carriage movable back and forth across thefirst carriage, a fixed rack on the frame, a 13111101'101Ltl16 first carriage cooperating with the" rackto advance said carriage, meanson the second carriage to rotate the; pinion, and means onthe first .carriage cooperating with the aforesaid means toeffect intermittent 'movement thereof by and during movement of the second carriage; v

15. In a pantograph, a frame, a carriage movable. thereon, a stylus carriage movable back and forth across the first carriage, a

fixed rack on the frame, a pinion on, the

first carriage cooperating; with the rack to advance said carriage, means on the second 6O- the stylus im v rsa movement a oscillate the arm by and during movement of the second. carriage to impart intermittent movement to the mechanism andzpinion.

16. In a pantograph, a design plate havmg electrically conductive and non-conductive surface portions, a cutter, means for;

rendering-the, latter operativeand inoperative and includlng an electrically operative element, a stylus, and a clrcuit including the latter, the. element, and: the conductive surface portion ofthe design plate and adapted to be closed upon bringing the stylus into contact with-the conductive surface portion of the design plate. 17, In a pantograph,a frame, a carriage on the first carriage, meanshaving oppositely moving parts for reciprocating the stylus carriage, I electrical means on the stylus carriage for operatively engaging said parts alternately to effect such reciproca tion, and a cutter operable by the movement of the stylus carriage 7 18. In a pantogra-ph, a frame, a carriage moi-able thereon, a stylus carriage movable reverse switch for. controlling said electrical means, an endless switch-throwing member embodying spaced stops for cooperatingwith the reciprocatorymovements of the stylus carriage to effect the throwing of theswltch, anda cutter controlled by the stylus car 19. In a pantograph, a cutter, electrical ineansfor lifting the cutter from its work,

stylus, and a circuit including said means andadapted to be closed through the stylus when the latter is operatively disposed.

20. Ina pantograph, awork support, means foroscillating-said work support, a stylus carriage, a second carriage support ng carriage and embodying spaced stops,- means under the control ofthe second carriage for. imparting oscillating movement to the work support by and during movement of said second carriage, means for; reciprocating the stylus carriage, sa d last means having a part engageable by sa1d stops for-controlling its operation, a cutter, and means for converting the motion of the stylus carriage into. a predetermined motion for the cutter.

21. A design'plate for the electrical control of the cutter of a pantograph, compris- *ing; electrically conductive and non conducground. a

n. pantesreph; a ed; a s y s m able t hereover, astylus carr age supported Werk s ppo electrically operated cutters for operating on the workin said support, a carriage sup- *porting the cutters, means connecting the cutters and stylus in circuit through a pattern on the bed, and means for transmitting the motion of the stylus carriage to the work support. i

23. In a pantograph, a bed, a stylus carriage supported for movement forwardly and rearwardlyand laterally relative thereto, a stylus on the carriage for tracing a design on the bed, awork support, a diamond bar supported for movement relative there- 'to, a cutter on the'diamond bar, and means operable by'the stylus carriage during its forward and rearward movements for moving the work support.

member taking about said series of projections and having its ends connected to the stylus carriage whereby upon forward movement of the latter the flexible member will wind and unwind to impart rotary movement to the shaft. I

2-5. In a pantograph, shed, a styluscar- 'riage movable lengthwise and laterally thereoffa work support, a cooperating cutter controllable by the stylus, and mecha-. 'nism for transmitting the movement of the stylus carriage in one direction to the cutter including acuttercarriage, and a thirdcarriage intermediateto cutter and stylus carriages, and variable speed transmission means connecting the cutter and intermediate carriages.

26. In a pantograph, a: bed, a stylus carriage movable lengthwise and I laterally thereof, a work support, a cooperating cutter, a carriage supporting the cutter and embodying a tooth portion, a pinion meshing with said tooth portion, a rotatable member with which said pinion is connected and provided with an expan'sible and contractible rim portion, a flexible member taking about the rim portion to have rolling contact therewith, and a support movable by the stylus carriage and having the ends of the flexible member anchored thereto,

527. In a pantograph, a bed, a stylus carriage movable lengthwise and laterally thereof, awork support, a cooperating eut- "ter, a carriage supporting the cutter, an intermediate carriage between the first two carriages, varlable motion transmitting means connecting the intermediate and cutter carriages, and means for imparting the lateral movements of the stylus carriage to the intermediate carriage.

28. In a pantograph, a bed, a stylus carriage movable lengthwise and laterally thereof, awork support, a cooperating cutter, a carriage supporting the cutter, an intermediate carriage between the first two carthereof, a work support, a cooperating cutter, a carriage supporting the cutter, an intermediate carriage between the first two carriages, variable motion transmitting means connecting the intermediate and cutter carriages, and means for imparting the lateral movements of the stylus carriage to the intermediate carriage including a bracket mounted on one carriage and having slidable connection with the other'carriage, and means for moving the stylus carriage embodying an endless drive member, and means carried by the bracket for selectively engaging either flight of the endless member.

30. In a pantograph, a bed, a stylus carriage movable lengthwise and laterally thereof, a work support, a cooperating cutter, a carriage supporting the cutter, an intermediate carriage between the first two carriages, variable motion-transmitting means connecting the intermediate and cutter carriages, and means for imparting reciprocatory motion to the stylus and intermediate carriages.

3].. In a pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, means for reciprocating the stylus carriage in one direction, and means operable by the carriage for intermittently imparting movement to the carriage at an angle to such reciprocatory motion.

32. In a pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof. a work support, a. cutter cooperating therewith, and means for reciprocating the carriage in one direction and moving it step by step transversely of such reciprocatory movement.

33. Ina pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts, and means for alternately engaging said parts to effect reciprocation of the carriage.

. 34. In a pantograph, a bed, a stylus 'car riage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts, means connected to riage movable laterally and lengthwisethereof,- a work support, a cutter cooperatthe'carri'ag'e and alternately engageablewith said parts to effect reciprocation of the car riage,and means operable by the carriage to ing oppositely moving parts, and electrical means for alternately connecting the carriage tosaid parts;

36. In a panto'graph, bed, a stylus caring therewith, a drive 'mechanism including oppositely moving parts, electro magnets connected to the styluscarriageand each adapted toengage afrespective; part of said drivemechanism', and means under the contr'ol of" the carriage for effecting alternate functioning of the-eleetro magneto.

ria ge movable laterally and lengthwise oppositely moving. parts, clutch devices 1 movable with the carriageand associated with tlie'r'espect'ive parts of the drive mechx anism to engagesaid parts, and means or alternately operating the clutch devices.

38; Ina 'pantograph, a' bed, a stylus carriage movable laterally and lengthwise thereof, a work support, a cutter cooperatin'g therewith, a drive mechanism ineluding oppositely moving parts, clutch devices movable with the carriage and assoclated wlth the respective parts of the drive mechamsm to engage said parts, elec-.

trical means for alternately operating the clutch devices including a switch, and means placing the switch under the control ofthe carriage by and during movement thereof.

39. In a pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts, clutch devices movable with the carriage and associated with. the respective parts of the drive mechanism to engage said parts, electrical means for alternately operating the clutch devices including a switch, a switch operating member, and adjustable stops thereon for engagement by the carriage at itsopposite limits of movement for operating the switch.

40. In a pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts, clutch devices movable with the carriage and associated with the respective parts of the drive mechanism to engage said parts, meanstor alternately operating the clutch devices,

and means for moving the carriage step by mechanism to engage said partsmneans for movable with the carriagcand associatedmovable p: 't

step transversely of the pathofreciproca= tion thereof. i i

-fll. In pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a "orksupport', a cutter cooperau ingtherewith a drive mechanism including oppositely moving parts, clutch devices movable with the carriage and associated with the. respective parts of the drive,

alternately operating the clutch devices, a rackextending transversely of the'path of reciprocation of said carriage, apinion meshing with said rack, and means operable by and during the reciprocation of said ear--- riage for imparting intermittent rotary movement to the pinion to eliect a corresponding movement o'lf the carriage trans verse to its pathof reciprocation.

In a panto ph,-a bedya stylus car-' ge n'iovable lat UI' and lengthwise iereoi', a work support cutter cooperattherewith,a drive in ianism including ppositelv moving pdliS, clutch devices with the respective parts of the drive mechanism to enga said parts, meansior alternately operct the clutch device, meansl or intermittently moving the car riage transversely ol the reciprocatory path thereof by and during such movements,said means embodying part movably carried by the rarriage, atoo'thed member extendi." aleng'the path of reciprocation, and a pawl carried hysaidmovable part for trailover said toothed member and adapted to engage with a tooth ther'eot upon the beginning otteach reciprocation to raise said and move thereunder to again trail over said toothed member and by raising said movable part to efiect such transcarriage.

verse movement of tie 4L3. In a pantograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a wori; support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts, clutch devices movable with the carriage and associated with the respective parts of the drive mechanismtc engage said parts, means for L15 alternately operating'the clutch device, a

second carriage supporting the stylus carand downward oscillation of the arm effected through the swinging of the pawl beneath its pivotal mounting, an endless cable taking about the drum, a pulley journaled on the second carriage and about ing therewith, a drive mechanism including oppositely moving parts, clutch devices movable with the carriage and associated with the respect ve parts of the drive mechanism to engage said parts, means for alter- I nately operating the clutch device, a second carriage supporting the stylus carriage for reciprocatory movement and movable itselfv in a transverse direction, and means carried by in part and operable by and during movement of the stylus carriage for moving the second carriage.

45. In a pa-ntograph, a bed, a stylus carriage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts,clutch devices movable with the carriage and associated with the respective. parts of the drive mechanism to engage said parts, electrical means for alternately operating the clutch devices ineluding a switch, a second carriage supporting the stylus carriage for reciprocatorv movement and movable itself in a transverse direction, andspaced stops arranged on the.

second carriage for controlling the switch.

46. In apantograph, a bed, a stylus carriage movable laterally and lengthwise riage, and an arm connected to the switch and extending between stops. 7 I p i? In a pantogra-ph, a bed, a styluscarriage movable laterally and lengthwise thereof, a work support, a cutter cooperating therewith, a drive mechanism including oppositely moving parts, clutch devices mov able with the carriage and associated with the respective parts of the drive mechanism to engage said parts, electrical means for alternately operating the clutch devices including a switch, a second carriage supporting the stylus carriage for reci n'ocatory movement and movable itself in a transverse direction, and motion transmission means connecting the second'carriage to the work support.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. v

' \VILLIAM Hf HOPE. lVitnesses i M. A. KINesLEY,

J. A. MILLER.

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