US1241723A

US1241723A - Geometrical machine.

Info

Publication number: US1241723A
Application number: US79681813A
Authority: US
Inventors: William S Eaton
Original assignee: American Bank Note Co
Current assignee: American Bank Note Co
Priority date: 1913-10-23
Filing date: 1913-10-23
Publication date: 1917-10-02
Anticipated expiration: 1934-10-02

Description

W. S. EATON.

GEOMETRICAL MACHINE.

APPLICATION FILED OCT. 23. 1913.

Patented Oct. 2, 1917.

3 SHEETS-SHEET 1 Wa /3&

W. S. EATON.

GEOMETRICAL MACHINE.

APPLICATION FILED ocT.23.1913.

1,241,723. Patented Oct. 2, 1917.

3 SHEETS-SHEET 2.

In ven tor:

by 52M Atty.

W. S. EATON.

GEOMETRICAL MACHINE.

APPLICATION FILED OCT. 23. I9l3.

1,241,723. Patented Oct. 2,1917.

E7 E6 3 suns-sneer a.

Inventor:

a ed/( m /-Aay RI TE STATE$ PATENT OFFICE,

WILLIAM S. EATON, OF SAG HARBOR, NEW YORK, ASSIGNOR TO AMERICAN BANK NOTE COMPANY, A CORPORATION OF NEW YORK.

GEOMETRICAL MACHINE.

Application filed October 23, 1913.

To all whom it may concern:

Be it known that I, WILLIAM S. EATON, a citizen of the United States, residing at Sag Harbor, in the county of Suffolk and State of New York, have invented certain new and useful Improvements in Geometrical Machines, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

My invention relates to geometrical machines, and more particularly to a machine adapted to create intricate designs by means of a master bearing a simple outline, character or base, having as a whole no resem blance to the design to be created or produced.

The main object of my invention is to provide a machine of this character wherein if desired, designs having regular or irregular outlines may be created, and the character of such outlines may, if desired, be varied indefinitely. A further object is to provide a machine of this character, capable a machine of this character wherein the elementary outline, character or base is adapted to receive a step by step lineal traverse so as to cause similar movement, through the reproducing mechanism, of the work table carrying the work plate or sheet, and wherein, if desired, the direction of this lineal traverse may be varied at different points, in thesame or varying degrees, to impart irregularity to the outline of the created design. A still further object is to provide a machine of the character herein described, wherein through the shifting of the work plate or sheet, designs having the general contour of a square or other angular figure may beproduced. A still further object is to provide a machine of this character in which the lines at the ends of adjoining sides of the created design may be joined, as by a miter joint,to secure substantial continuity of these lines at the corners, and avoid any substantial deepening of the tone values at such corners. And a still further object is to proide a machine of this character capable of creating line designs with accuracy and'precision, the outline and tone Specification of Letters Patent.

Patented Oct. 2, 1917.

Serial No. 796,818.

values of the created design being determined by the elementary outline, character or base through the cooperation of different parts of the machine, the design being incapable of reproduction excepting through the use of the same elementary outline, character or base, and other parts of the machine which, in conjunction therewith, control the detailed character of the design produced.

The invention consists primarily in a geometrical machine embodying therein a support for an elementary outline, character or base, a support for a work plate or sheet, a work point, means adapted to follow said elementary outline, character or base and cause relative movement of said support for a work plate or sheet and said work point whereby a reproduction of said elementary outline character or base may be described upon said work plate or sheet, and means whereby lineal traverse may be imparted to said support for the elementary outline, character or base to effect the spacing of succeeding reproductions thereof; and in such other novel features of construction and combination of parts as are hereinafter set forth and described, and more particu larly pointed out in the claims hereto appended.

Referring to the drawings Figure 1 is a side elevation of a machine embodying my invention;

Fig. 2 is a front elevation thereof;

Fig. 3 is a plan view of the support for the elementary outline, character or base, and the actuating means therefor, a plate bearing said elementary outline, character or base being shown in position upon said support;

Fig. 4 is a section on the line 4-4 of Fi 3; and

Fig. 5 is a fragmentary view of a design created by the machine shown in the drawings.

Like letters refer to like parts throughout the several views.

In the accompanying drawings, '1 have shown an embodiment of my invention which includes therein the essential characteristics of a well known type of pantographic engraving machine, which in actual use I have found to give highly satisfactory results. This machine, however, is merely typical of a large number of machines in which my improvement may be incorporated, and if desired, still other and special' designs of machinesadapted for special uses may be constructed so as to embody the essential characteristics of my'invention.

' In the following description, I have referred more particularly to the particular type'of machine shown in the drawings, I being expressly understood, however, that. 1t.

is not my intention to in any Way limit myself 'to any particular mechanism for trans- "mitting in'ovement' as defined by the elementary outline, character or base, to the mechanism by which thedesign is produced. 5 My inrention is especially adapted for use in :creating designs for, or upon, printing plates, and'plates or matrices for use in .bein used, and the-design being finished by hand; Owing to the 'well knownand well' defined operative effect .of suchengines, the border designs have not been widelydiversn lied, and the angular'figure designs have usually been created by combining different sections of the mechanical design produced by the rose engine orengine lathe, the labor of producingsuch designs, as with rosettes, having; been extensive and having required a high degree of skill. V

By my improved mechanism, I am enable'd to secure complex designs, susceptible of Wide variation, both as toborders', parts of borders, or angular figures, each of which designs will be'coinplete initself, and when. a plate is made upon a machine, will require no hand finishing.

1 am also enabled to mechanically superimpose one design' upon anpther, or toinsert a number or word design in the body of a scroll work design, and I am enabled to make a proof design and a completed desi gnin a materiallyshorter time thanis pos- 'sible with the old rose engine and hand work methods.

V In-the form of the inv ention shown in the accompanying drawings, 1 indicates a central column, carrying a bedplate2 for a movable table 3 adapted to carry the sheet or plate upon which the design is to be formed. Said column is mounted upon the 'main table 4 of the machine which may be supported'in' any desired manner. 7 The table 3 is mounted to have unlversal movement in themovement of the work supporting table 3. At 6 are ball bearing mounts for the table 3 which insure absolute. freedom of movement;

as the oscillatory arm 7, for a Work point 8, which in the form'ofthe nvention sl own is an ordinary grave'n- The oscillatory work point carrying arm is controlled by the" link,

treadle and lever mechanism'9, this point be- Mounted upon the column 1 above the work table 3 is a supporting means,

inada ted to ibe brou ht into contact with the ivbrk surface through gravity. only. I

liioun'ted by means. of a universal? joint 10 and a. verticallyadjustable collar 11, upon thecolumn l, isv a transmitter12, one end of p which is adapted to have mounted therein tracing point or stylus 13, and the othe end -of' which is. connected by means of anniversal o-int, not shown, with the worktable 3.

The ad ustability ofthev collar 11 is for the purposeof varying the range of move: ment ofthetable as comparedwith that of the tracing point or stylus. Carriedby the work table 3 is a Work support- 14 having means whereby. a plate or. sheet may be at- .tached thereto,which mean adapted t6 be released to permit the adjustment of the plateor sheet'on said tableto secure the proper placing of: the design on saidv plate orsheet,.or the turning of 'saidplate or sheet upon its support, in creating angular figures.

The mechanismgabove' described has been ieretofore patented to me by Letters'Paten t #1,039,714-, dated October 1, 1912, and i-t 'is not my intention to claim such mechanism broadlyat illllS'tlIllS. vThe elements aboye referred to constitute one type of pa'nt'o graphic engraving. mach ne embodying one character of reproducing means, the mode of operation of which contemplates the ex act reproduction or" a design or pattern upon P any desired scale. 7

By my present invention, howevenl do not reproduce a fixed design, but vary the operation oi the above described mechanism port for said plate 15 which is capable or.

and adapted to receive, lineal movement aftereach reproduction ofsaid elementary outline, character or base, so as to secure the desired spacing of such'reproductions to-develop a design consisting of a plurality of figures similar to the elementary outline, character or'base, the lines of'which intersect 1n amanner whereby a design is'created each other in a manner to obscure the nature of the elementary outline, character or base,

and secure various tone values throughout the created design.

In order to increase the complexity of the design, I also prefer to so construct said support that in addition to a rectilinear movement thereof, simultaneous angular movement may be imparted thereto, for imparting irregularity to the outline of the completed design. a I

The extent of this angularmovement may vary to secure curved effects, as shown in the accompanying drawings, or may be uniform, to secure angular effects. Furthermore, the degree of such irregularity may be varied at will, or such movements may be both regular and irregular, successively and alternately, to impart to the design both curved and angular effects as to the outline thereof.

The main table 4: has fixedly mounted thereon a base plate 16, having a way 17 therein, extending laterally of the machine. Slidably mounted upon the base plate 16, is a plurality of superimposed

plates

18 and 19, the former of which is slidably mounted in the way 17, and the later of whichis slidably mounted in the ways 20 upon the plate 18, the way 20 extending perpendicularly to the way 17.

By this construction, simultaneous movement of the plate 15, bearing the elementary outline, character or base, in two directions, may if desired, be secured.

To impart the desired lineal traverse to the plate 18, I provide said plate with an extended rack 21, with which the gear 22, carried by the plate 16, is in mesh.

Mounted upon the shaft of this gear is a ratchet wheel 23, cooperating with which is a spring pressed pawl 24, having a release handle 25 by means of which the pawl may be disengaged from this ratchet to permit the reverse rotation of the gear 22 to restore said plate 18 to its starting position.

, The gear 22 and ratchet 23 are provided with a knurled operating head 26.

While in V raotice this mechanism has been found satisfactory, it is not my intention to limit myself to the specific mechanism for imparting a lineal traverse to the support for the elementary outline, character or base. By the mechanism described, however, a step by step movement may be imparted to said support and accuracy as to the quantity of each movement may be secured.

To secure the desired movement of the plate 19, independently of that of the plate 18, I mount upon the base plate 16, a controlling or cam plate 27, having an operative surface 28, cooperating with the contact or hearing 29, carried by and movable with the plate 19.

While in the accompanying drawings, I have shown the controlling or cam plate 27 as having an undulatory or ogee contact surface, the contour of this surface may be varied indefinitely and may be curved or angular, or both, as desired, for the purpose of causing the desired variances in the outline of the created design.

The uppermost plate 19 of the superimposed plates constituting the support for the elementary outline, character or base, is normally forced toward the controlling or cam plate 27 by the

springs

30 and 31, extending from said plate to studs carried by the plate 18, so as to cause this plate 19 to follow the rises and falls or straight portions of the controlling or cam plate 27.

The construction heretofore described maybe used. for making short sections of border designs within the operative range of the transmitter 12; and the contour of the outlines of the designs may be varied by substituting a controlling or cam plate 27 having an operative surface 28 of one contour, for such a plate, the operative surface of which is of a different contour, the changes in such contour being susceptible to wide variation from a rectilinear surface to curved surfaces, angularly extending surfaces, or a combination of any two or all of such surfaces, and the degree of length of such surfaces may also be varied as desired.

l/Vhen it is desired to use the mechanism herein described, for developing angular figures, or for forming corners of a border design, I mount upon the base plate 16, a bridge having divergent arms, 3233, of the desired angle, which arms project over the

superimposed plates

18 and 19 in a manner to permit. a free movement of these plates thereui'uler while serving as a stop for determining the starting and stopping points of the stylus with relation to the elementary outline, character or base in a manner to limit the quantity of said outline, character or base reproduced at the angles of the created figure. WVhen it is desired to produce a design having a general outline of a llltltlllltlttl'tll figure, the

arms

32 and 33 are set upon the base plate 16 so as to project the pattern 15 in the path of the stylus so as to define the beginning and end of each line. By this means the complete reproductions of the master or base will be prevented by the engagement of the stylus with said arms respectively the quantity of re n-oductkm at opposite ends being gradually increased or decreased as the master or base passes under or from under said arms respectively. The munber and arrangement of lines at each end of the design will be the same, but the design will be cut off at an angle of 45, and hence, by turning the work plate or sheet one quarter of a turn, and duplicating the design, already thereon, a perfect tachably mounted uponthe base plate 16 so 7 miter-jointfwill be formed, the lines of which atthe adjoining sides will be in ex act register, even tho-ugh none of these lines may be great.

Furthermore, the number of lines upon each side will be the same, and the tone values at this point will be the same as throughout the rest of thedesign.

If it be desiredto develop a design having other than four sides abridge may be used in which the angle between the arms 1 82 and 33 will be more or less than 90but the circular movement of the work pla'te,to bring it to position to produce each side of the figure, must-correspond in degrees with the degrees of the angle between the said arms. For example, if a hexagonal figure is required arms, the angle of divergence of which is 60, will be used and the'plate will be: turned 60 upon completion of one side preparatory to adjoining side. I I

When the mechanism herein described is being used for creating angular designs, the factthat the stylus starts and stops at a difbeginning work upon the ferent point of the elementary outline, character or base each time, prevents the male ing of a continuous outline upon the'work by holding the work point in engagement with the work plate or sheet when effecting the spacing of succeeding reproductions. Hence, I provide t-hecontrollingror; cam

plate 27 with a guide line, as 34, following the contour of the contactsurfaee 28 so that after one side of a figure is completed, an outline line may be added thereto. Said controlling or cam plate mayalso be provided'with' other guide lines, as 35 and 36, which may be used for running lines through the body ofthe created designs, thus serving to still furthercomplicate the design;

The controlling or cam plate 27' isde- I with parts thereof only superimposed upon each other. As a rule, however, a sufliciently' complicated design may be created without using th s achustment.

"If it be desired,- however, to complicate the design, this may also be done by varying the scale of the reproduction by means of the collar 11, or by using elementary outlines, characters or bases, of different dimensions, and superimposing the design created from one" upon that created from another. 4

The work plate or sheet is indicated at .39.

1 genres The operation of the herein described de- 7 vice issubstantially as follows The work plate or sheet 39 having been mounted upon the plate 19, the stylus 13 is caused to follow said outline, thus causing a similar movement ofsaid work table "3 through the transmitter 12. Prior to the movement of the transmitter, the treadle and linkmechanism 9 is used to force the work point 8 into engagement with the work plate or sheet. After one reproduction of the elementary outline, character or base upon the workplate or sheet '39, the

point 8 is raised out ot-engagement with the said plate, and the gear22 turned to advance the plates 18 and 19 a distanceof one ter or base again reproduced thereon. This operation is successivelyrepeated within the range of movement of the table 18 or of the transmitter 12, the-elementary outline, character or base being fed forward lineally after each reproduction thereof; V l/Vhen the design-is completedfit will be a simple border desigmthe lines of which will intersect ina manner to obscure the nature of the elementary outline, character or base used.-

If a straight outlinedesign is required, a controlling or cam plate 27 having a straight edge may be used, but; if it is dcsiredito have an irregular contour or outline to thecreated design, a controlling plate or cam 27 having an operative surface 28 including therein curved or angular portions, with or without intervening straight portions, may be used, although it is to be understood that the outline of the design will not be in exact accord with that of the contact surface of the controlling or cam plate because this will be modified in great measure by the ice character of the elementary outline, character or base.

WVhen a'cam plate having rises and falls is used, each rectilinealfeeding movement of the plate 18 will result in a rectangular movement of the plate 19. under its

springs

30 and 31, the extent of this movement being defined by the character of the "contact sur face 28 of the controlling or camplate 27.

When the contour of the operative surface 28 is curved, the extent of this angular movement of the plate 19 will vary with succeeding feeding movements, even though these feeding movements in themselves, be

regular. Hence, the effect is to give the created figure an outline in the nature of a curve. WVhen, however, the rises and falls are angular, the extent of the angular movement of the plate 19 with each feeding movement will be the same, and the effect will be an angular contour in the created design.

The nature of the created design is complex, and difficult if not impossible to rcproduce by hand, as it will consist of a great number of intersecting lines, and the design in its entirety will have different tone values, from the deep tone of the edges to very light tones toward the center.

Furthermore, if desired, words or numerals may be superimposed directly upon a created design, thus removing parts of the intersecting lines, and making identification of the elementary outline, character or base used more difficult.

In some lines of safety paper work, it is desirable to produce figures, which in a general way are quadrilateral, although the outlines are irregular. When it is desired to create such a design, by means of this machine, the bridge having the divergent angular arms, 32 and 33, is mounted upon the plate 16, with the said arms extending over and across the plate 19. This plate is thenbrought to the left, Fig. 3, until a portion of the elementary outline, character or base extends beneath the arm 32. The stylus 13 is then brought into position in engagement with that point of said elementary outline, character or base, which will cause said stylus to bear upon the arm 32, and the part of the outline exposed within said arms is traced so as to reproduce only that portion upon the work plate or sheet 39. The plate 18 is then fed for wardly by means of the gear 22, in the man ner heretofore referred to, and the stylus 13 again brought into engagement with the elementary outline, character or base, and against the arm 32, and the exposed portion of the figure within the arm 32 and the arm 33, is again traced, this operation being repeated until ultimately the entire elementary outline, character or base is exposed within the

arms

32 and 33. By succeeding feeding movements, this elementary outline, character or base will pass in successive steps under the arm 33, and under such conditions, the manner of tracing will be re versed, the stylus 13 with each tracing operation, starting from contact with the arm 33 and ending in contact with said arm 33.

When the completed elementary outline, character or base has passed below the arm 33, so that no portion thereof is exposed between said arm and the arm 32, the work plate or sheet 39 is turned upon its support 14, one quarter turnin the form of the in vention shown in the drawings, and the

plates

18 and 19 are restored to their former position and the operations above referred to repeated.

The

arms

32 and 33 projecting with the same degree of obliqucncss, and in divergent directions, it apparent that the mutilated sections at the ends of the created design will be dissimilar or will constitute opposite halves of one umnutilatcd design, built up of the same number of reproductions of the elementary outline, character or base, so that in reprmlucing the design with the mutilated ends, a perfect miter joint effect may be secured at the corners, the lines of which will meet and accurately register.

In this manner. a quadrilateral figure may be produced although the outlines need not be straight, as by using a controlling or cam plate 27 the outlines of the figure may be modified in the manner above referred to.

l/Vhen creating an angular figure, the elementary outline, character or base may be of a height as compared with the length of the sides of the figure, to cause the lower portion thereof to cross the center of the figure, thus multiplying the number of lines at the center of the design and varying the tone values at this point, and creating a distinct center design, the character of which center design, as well as that of the outline of the figure, depending upon the contour of the operative surface of the controlling or cam plate, and the contour of the top and bottom of the elementary outline, character or base.

Throughout this specification when referring to an elementary outline. character or base, I contemplate a geometrical figure or an incomplete geometrical figure as distinguished from more straight or curved lines, the outline of which figure taken as a base and repeatedly reproduced in the manner determined by the controlling or compelling mechanism will create, form or constitute the completed intricate geometrical design.

By the term work plate or sheet as used in the specification, I contemplate a metallic plate from which portions of the metal are to be actually removed; a copper plate coated with resist, to be removed preparatory to an acid etching process; proof glass or paper upon which a design may be made to determine the suitability thereof before making a plate; matrices from which a cast is to be made, or any other substance or material adapted to receive in any manner whatsoever, a design. By the term work point is to be included any instrument or implement for marking, cutting or scratching upon any material.

The bridge embodying the arms 32 and 33 i being removable, the machine may be used as a border machine or for creating eccentric geometrical figures. r v p In describing the operation of the ma chine, I have referred more particularlyto the mode of operation which I have found satisfactory in use, but it is apparent'that the nature of the design created may be varied by changes in the extent to which the stylus is caused to travel over the elementary outline, character or base, and variances in the spacing of succeeding reproductions of the same.

It is not my intention to limit myself to the precise details of construction shown in the accompanying drawings, it being apparent that such may be varied without departing from the spirit and scope of the invention.-

Having described my invention, what I claim as new and desire to have protected by Letters Patent, is

1.1A geometrical machine embodying a support, for an elementary outline, character or base, a support for a work plate or sheet, a work point, means adapted to follow said elementary outline, character or base and cause relative movement of said support for. a work plate or sheet and said work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, and means whereby lineal traverse may be imparted to said support for the elementary outline,

"character or base to effect the spacingof succeeding reproductions thereof.

' 2. A geometrical machine embodying a support for an elementary outline, character or base, a support for a work plate or sheet,

a work point, means adapted to follow said elementary outline, character or base and cause relative movement of said support for a workplate or sheet and said work point whereby a reproduction of said elementary "outline, character or base may be described upon said work plate or sheet, means whereby lineal traverse may be imparted to said support for the elementary outline, character or base to effect the spacing of succeeding reproductions thereof, and means whereby the direction of said. traverse may e ried, a

3. A geometrical machine embodying a support for an elementary outline, character or base, a support'for a work plate or sheet, a work point, means adapted to follow said elementary outline, character or base and cause relative movement of said support for v a work plate or sheet and said work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, a rack carried by and movable with said first named support, a gear meshing with said rack, means whereby said gear maybe intermittently ac tuated, and a pawl and ratchet mechanism acting upon said'ge'ar, whereby lineal step by step traverse may be imparted to said supportfor the elementary outline, character m tres orbase, to eiiect thespacing of succeeding reproductions thereof.

4t. A geometrical machine embodying a support for a work plate or sheet, a work point, a support for an elementary outline, character or base, comprising a plurality'of.

superimposed plates adapted tohave simultaneous movement in directions perpendicumeans defining the movement of the uppermost vof said plates in another direction, whereby the direction of traverse of the elementary outline, character or base is varied.

5. A geometrical machine embodying a support for a work plate or sheet, a-work point, a support for an elementary outline,

characteror base, comprising a plurality of superimposed plates adapted to have simultaneous movement in directions perpendicu lar to each other, means adapted to follow said elementary outline, character orv base and cause relative movement of said support for a work plate or sheetand said work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, means ime parting movement" to the lowermostof'said superimposed plates in one direction, a controlling or cam plate mounted in a fixed position adjacent the uppermost of saidsuperimposed plates, a' contact carried .by'

outline, character or base may be described 7 upon said workplate or sheet,"means imparting movement to the lowermost of said superimposed plates in one direction, acontrolling'or cam plate, means whereby said controlling or cam plate may be'detachably amounted in a fixed position adjacent the uppermost of said superimposed plates,

whereby a controlling or cam plate having an operat1ve surface of one contour may be substituted for one having a different'open ative surface of contour, a contact carried" by the uppermost of said superimposed plates, and means whereby said contact is held in normal engagement with said controlling or cam plate.

7. A geometrical machine embodying a support for a work plate or sheet, a work point, a support "for an elementary outline, character or base, comprising a plurality of superimposed plates adapted to have simultaneous movement in directions perpendicular to each other, means adapted to follow said elementary outline, character or base and cause relative movement of said support for a work plate or sheet and said work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, means imparting movement to the lowermost of said superimposed plates in one clirection, a controlling or cam plate mounted in a fixed position adjacent the uppermost of said superimposed plates, said controlling or cam plate being adjustably mounted upon said support for the elementary outline, character or base whereby said plate may be adjusted toward and from said supporting plate, a contact carried by said last named plate, and means whereby said contact is held in normal engagement with said controlling or cam plate.

8. A geometrical machine embodying a support for a work plate or sheet, a Work point, a support for an elementary outline. character or base, comprising a plurality of superimposed plates adapted to have simultaneous movement in directions perpendicular to each other, means adapted to follow said elementary outline, character or base and cause relative movement of said support for a work plate or sheet and said work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, a rack carried by and movable with the lowermost of said plates, a gear meshing with said rack, means whereby said gear may be intermittently actuated, and a pawl and ratchet mechanism acting upon said gear, whereby lineal step by step traverse may be imparted to said support for the elementary outline, character or base, to effect the spacing of succeeding reproductions thereof, a controlling or cam plate mounted in a fixed position adjacent the uppermost of said superimposed plates, a contact carried by said last named plate, and means whereby said contact is held in normal engagement with said controlling or cam plate.

9. ,i geometrical machine ei'nbodying a support for an elementary outline, character or base, a. support for a work plate or sheet, a work point, means adapted to follow said elementary outline, character or base, and cause relative movement of said support for a work plate or sheet and said Work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, and an abutment operative upon said reproducing mechanism, whereby the reprodm-timi of portions of said elementary outline, character or base is prevented at predetermined points of the created design.

10. A geometrical machine embodying a support for an elementary outline, character or base, a support for a work plate or sheet, a work point, means adapted to -follow said elementary outline, character or base and cause relative movement of said support for a work plate or sheet and said Work point, whereby a reproduction oi said elementary outline, character or base may be described upon said work plate or sheet, means whereby lineal traverse may be imparted to said support for the elementary outline, character or base to effect the spacing of succeeding reproductions thereof, and a bridge mounted adjacent to, and having divergent arms projecting over said support for the elementary outline, character or base, where by the reproduction of portions of said elementary outline, character or base is prevented at opposite ends of the created design, and an angular geometrical figure having mitered corners may be produced.

11. A geometrical machine embodying a support for a work plate or sheet, a work point, a support for an elementary outline, character or base, comprising a plurality of superimposed plates adapted to have simultaneous movement in directions perpendicular to each other, means adapted to follow said elementary outline, character or base and cause relative movement of said support for a work plate or sheet and said work point whereby a reproduction of said elementary outline, character or base may be described upon said work plate or sheet, means imparting movement to the lowermost of said superimposed plates in one direction, means defining the movement of the uppermost oi said plates in another direction, whereby the direction of traverse of the elementary outline, character or base is varied, and a bridge mounted adjacent to, and having divergent arms spanning said support for the elementary outline, character or base whereby the reproduction of portions of said elementary outline, character or base is prevented at opposite ends of the created design, and an angular geometrical figure having mitered corners may be produced.

'12. A geoIIwtrical machine embodying a support for a work plate or sheet capable of universal movement upon a single plane, a support for a Work point adjacent thereto, a work point carried thereby, means Whereby said support for said work point may be actuated to bring said point into or out of engagement with the Work plate or sheet, a

support for an elementary outline, character or base, comprising a plurality of superimposed plates, means whereby movement may be imparted to the lowermost of said plates in one direction to effect the spacing of succeeding reproductions, means whereby the uppermost of said plates is adapted to have movement perpendicularly of the movement of the lowermost of said plates, a controlling-or cam plate for defining the 'movements of theiuppermost of said plates, a transmitter adapted to carry a stylus for tracingthe elementary outline, character or base, and to impart movement to sald Work table and means whereby the scale of re 7 YWILLIAM EATON.

Witnesses M. R, :REIMANN, E. P. EATON.

Copies of this patent may be obtained for five cents each, by addressing-the Commissioner of Patents,

Washington, D. C.