US1471869A

US1471869A - Engraving machine

Info

Publication number: US1471869A
Application number: US566810A
Authority: US
Inventors: Harry G Turmer
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-09-08
Filing date: 1922-09-08
Publication date: 1923-10-23
Anticipated expiration: 1940-10-23

Description

H. G. TURNER ENGRAVING MACHINE Filed Sept. 8. 1922 3 Sheets-Sheet l isfcujotow m} & 15

1 v .-155 /5 7 (7 INVENTOR.

ikwww A TTORNEK @cii, 23 11923. 11,4711,869

H. G. TURNER Z ENGRAVING MACHINE Filed Sept; 8, 1922 3 Sheets-Sheet 2 I VENIUR.

' TTORNEY @cih 23 11923.

H. G. TURNER ENGRAVING MACHINE a Sheets-Sheet 5 Filed Sept. 1922 f 1 INVENTOR.

Patented 23, i123.

urn star as a. run.

an e OF CHICAGO, ILLIHMES.

ENG'VJING MACHINE.

Application filed September a, was. Serial No. scen c.

To all whom it may doncem:

Be it known that I HARRY .Gr. TURNER, a citizen of the United sass, residing in Chicago, Cook County, Illinois, have mvented certain new and useful Improvements in Engraving Machines, of which the following is a specification.

These improvements relate to engraving machines, and are exemplified herein more particularly as pertaining to that type of engraving machines in which lines are formed on a coated plate by means of a needlelike st lus or graver whereby the surface of the pl ate is exposed in lines constituting the design to be reproducedand the plate being thus prepared for an etching process with acid, the etched plate beingused for reproducing the design. Such etched plates andthe printing operations employing them are well known, and it has been suggested heretofore also to provide mechanical devices whereby the operator may move a tracer by hand upon a desired design on a pattern plate such as illustrated herein and thus cause the movement of a stylus or graver over the surface of a coated plate for the general purpose mentioned. The use of a pantograph device in engraving machines is not novel at this time. p

The general objects of the present imrovements as applied to devices of the type illustrated herein are to simplify, cheapen and render more easy and rapid the trans ferring of designs to such coated lates for the ensuing etching operation. ore specific objects and advantages will appear hereinafter.

In the accompanying drawings, which form a part of this specification, Figure 1 is a perspective, partly broken away, of the device complete in a highly advantageous embodiment; Fig. 2 is an enlarged fragmentar-y detail showing a rack and pinion connection shown in Fig. 1; Fig. 3 is a perspective of an adjustable plate holding member:

Fig. 4 is a fragmentary vertical sectional view of table parts on about the line 4 of Fig. 1; Fig. 5 is an enlarged front view of the tracer head; Fig. 6 shows the parts of Fig. 5 as viewed at right angles there-to; Fig. 7 is an enlarged front view of the graver head; Fig. 8 is a top 'view thereof; ig. 9 is a view at right angles to the view of Fig. 7 and Fig. 10 is a fragmentary face view of a lay-out strip which may be considered as of paper.

The various mechanisms are shown as be- 1n mounted on a horizontal table 15 which w 1 preferably be supported at ordinary table height rom the floor whereby the operator may sit comfortably while at work. The supportlng arm 16, inmy practice a castmg, extends so as to overlie the table and is provided with upper and lower pivot bearmgs to accommodate the ends of the vertical supporting rod 17 for easy rocking movement therein. A pantograph device is carrled for sw1n ng movements in horizontal planesupon t 1s rod 17 as by securing the mounting 18 to the rod 17 by means of the set screw 20. The mounting 18 and therefore the pantograph device as a whole may be adjusted in vertical directions and held at any deslred relative elevation ,b the screw 20. Such vertical adjustment 0- the pantograph as a whole is advantageous in initially assembling the device and also from time to time according to plates or other objects of dlfierent thicknesses respectively operated upon and provides for the use of tracers and gravers of different lengths.

Two

rods

21 and 22, one above the other, materially spaced apart and extending parallel with each other, are rigidly secured to the mounting 18 and constitute one arm of the pantograph. The yoke-like member 23 1s shda-bly mounted on these two rods and may be held in any desired relative position by the set screw 24. An arm support 25 is pivotally mounted on a vertical axis upon the yoke 23, and the pantograph arm or rod 26 is slida-bly mounted in the support 25 and may be held in any desired relative position by the set screw 27. The front end of the rod 26,-Fig. 9, is rigidly secured to a mounting 28 which. is vertically bored to receive slidablythe graver rod 30. This mounting 28 is mounted for rocking movements on a vertical axis in the frame 31, Fig. 7 by means of a pair of

cone bearing members

32 and 33 adjustably mounted in the frame- 31 whereby the desired precision of movement at the connection may be maintained.

Rigid with the frame 31 is the pantograph arm 34, the free end of which is carried by a supporting member 35, Fig. 1, which is mounted for horizontal rocking movements on the vertical axis 36 in the frame or mounting 37, the set screw 38 being adapted to hold the rod 34 and mounting 35 in any desired relative position.

j menace The fourth pantograph rod member passes through the frame member 37 and 18 held by the set screw 39, and at its other end it is rigid with the supporting member 41 which is mounted for horizontal rocklng movements on the vertical axis 42 in the frame 43, to which frame are also secured, and in rigid relation thereto, the

rods

21 and 22.

The several pivotal connections at 27, 36, 42 and at the ends of the rod 17 may be considered to be of the cone-andsocket type shown at 32 and 33 in Figs. 7 and 9.

From the foregoing description of the pantograph elements it will be noted that the ,pantograph as a whole is sustained in its normally horizontal position by the spaced apart

rods

21 and 22 which in turn are held by the vertical rod 17, and also that the various pantograph rods or members are so connected to each other that they will have the usual pantograph movements. The markings on the several rods shown in Fig. 1 are graduations by which the effective length of the pantograph members may be increased or decreased in predetermined amounts.

The front end of the rod 40 is rigidly secured to a supporting member 45, Fig. 6, which is vertically bored to accommodate for sliding "movements therein the rod-46 held adjusta'bly by the set screw 49, the rod 46 having the cross-piece of insulating material 47 secured thereto by a pair of screws 48. The insulation 47 carries a pair of

binding posts

50,50 and also a pair of spring arms 5 1 51 with which the binding posts respectively are in electrical communication, each arm 51 havin a block of insulation 52 at its lower en portion and each having. its lower end bent inward withthe metal of the spring contact arms 51 exposed at 53 on the plane of the inner surface of the insulating blocks 52. The lower end of the rod 46 is axially bored and tapped at 54 to accommodate the upper end of a screwthreaded tracer-holding rod 55 which may be'threaded into the rod 46 adjustably and held in any given position of adjustment by the thumb nut 56 on the threaded rod 55, the nut being adapted to jam against the lower end of the rod 46. A contact collar 57 is slidably mounted upon the lower end portion of the rod 46 and is provided with a pair of oppositely-disposed handle bars 58. A coiled spring 60 between the thumb nut 56 and the collar 57 maintains the collar in a raised relative position when the device is not in actual operation. The collar 57 has an annular enlargement 61 at its upper end against which the insulating blocks 52 press when the collar is in its raised position. When downward pressure is applied to the handle bars 58 the collar 57 is lowered and the rib or annular projection 61 then contacts the extremities 53 of the spring contact members 51 whereby electrical current may pass from one contact member to the.

other. A pin 62, Fi 5, limits the upward movement of the col ar 57. The lower end of the rod 55 is recessed at 63 to receive the end of the tracer 64, which may be an ordinar hel in place by the set screw 65.

Turning now to Figs. 7, 8 and 9, the graver 30 usually provided with a diamond point at the bottom, projects loosely through the support 28 and the

bearings

32 and 33 therefor and its upper end portion is screw threaded to receive the adjusting thumb nut and is provided with a diametric saw cut at 71, Fig. 9, to accommodate upper and

lower arms

72 and 73 pivoted respectively at 74: and 75 in the vert1cal support'76 rising from the frame 31. A weight 77 is held in various positions of adjustment on the arm 72 by the set screw 78. The arm 73 carries the armature 80 of a pair of electro-magnets 81. A spring 82 maintains the armature 80 away from the pole faces of the magnets when the magnets are not energized, and since the arm 73 is below the nut 70 the spring 82 also maintains the point of the current is not flowing through the magnets 81. The adjustment of nut 79 on the rod 7 9 determines the amount of vertical relative movement the graver 30 shall have. From Fig. 7 it will be noted that should current be passed through the magnets the armature 80 would be lowered and that the graver 30 would thereby be induced to move down ward, partly through its own gravitational action and partly through the action of the weight 77, and that according to the relative position of the weight 77 on the rod 72 the downwardly-directed force acting upon the graver 30 will be greater or less.

Electrical conduits 83 and 84 are shown as being connected to the binding posts 50, Fig. 1, and one of these as 84 will be understood as leading to a battery B diagrammatically shown; that the other thereof as 83 leads to the'binding post 85, Fig. 7, and is thereby placed in electrical communication with the coils of the magnets 81; and that another connector as 86 leads from the battery and is connected'to the binding post 87, Fig. 7, which is also in communication with the coils of-the magnet 81, the arrangement being such that when the handle bars 58, Fig. 5, arelowered, the circuit of the battery is completed through the magnet coils, and this action results in a simultaneous lowering of the graver when the handle bars associated with the tracer are downwardly moved.

Upon the table 15 is provided a pair of parallel guides 90 extending from left to right. On these guides 90 the platform 91 is mounted for sliding movement in the disteelphonograph needle and which is graver 30 in raised relative position when rectionl of the guides. On the lattorm 91'is rigidly mounted a pair of gui es 92 extend ing at right angles to the guides 90, and on the uides 92 is slidably mounted the plateholding-table 93. This table 93 is rovided with a plurality of apertures 9% a apted to accommodate the pins 95 of the stop or holding bar 98 whereby this stop 96 ma be positioned to accommodate plates of ifierent dimensions. The screw-operated clamp 97 is adapted to ress against'the front edge of the plate 98 w ereby the plate is held tightly between the clamp and the stop 96. The movement of the late-holding table 93 on the guides 92 provi es for adjusting the work with respect to the various lines of words, etc., to be engraved thereon.

A rack 100 is pivotally connected at 101 to the platform 91, this rack passing over any selected one of three

pinions

102, 103 and 104, Fig. 2, on the shaft 105 journaled in hearings on the main table 15. The rack 100 is held in engagement with the particular inion selected by means of the cone-pulleyike roller 106 on the arm 107 drawn downward by the spring 108. The rack 100 is mounted at 101m permit of its bein moved laterally so as to travel upon any of t e three pinions mentioned. At the other end of the shaft 105 there are mounted a plurality of pinions such as 110, 111,112, etc., of gradually increasing diameters respectively and the sliding rack 113 is adapted to engage with any of the

pinions

110, 111, 112, etc. To accomplish this the rack'113 is mounted slidably in a carrier 114 which is mounted slidably upon the shaft 115 which is j ournaled at I each end portion in brackets downwardly extending from the main table 15. A coiled spring 116 draws the u' per part of the carrier 11 1, and with it t e rack 113, toward the

pinions

110, 111, etc. The shaft 115 carries a pinion 117 heldbetween a'pair of extensions 118, one of which is shown in Fig. 1, through which extensions 118 the shaft 115 rotatably projects. The shaft 115 has a key-way 120 and it is to be understood that a key carried by the loosely mounted pinion 117 slides in the key-way 120 whereby the rotation of the shaft115 will rotate the pinion 117.

The construction and arrangement thus next hereinabove described is such that when the shaft 115 is rotated n the clockwise d1- 122 may rotate freely on the shaft. The wheel 122 carries the gear 124 with which meshes a worm 125 on the shaft 126. A

hand lever 127 enables the operator to rotate the wheel 122 in one direction or the other. The wheel 122 has its outer periphery on cylindrical lines and this outer periphery projects through an opening at 128 in the main table 15. The table 15 has a forward extension 130 adapted to receive a fiat pattern plate 131, which rests against a guide block 132 and is held by a spring pressed clamp 133 which is released through a simple system of levers includin the kneepiece 134 normally adjacent to a nee of the operator. By pressing against the lever let the clamp 133 is raised, releasing the pattern plate 131 for longitudinal movement or removal from the machine.

In view of the foregoing description the operation of the'device may be described as follows: Let us assume that the operator desires to trace upon the pre ared plate 98 the Words .Milk products. pattern late such as 131, which contains depressed etters, places the pattern plate before him on a table or bench, takes a strip of paper 135, Fig. 10, and lays oil on this strip of paper the respective widths of letters to be used as shown by the pattern plate. For instance, the small marks 136 and 137 (Fig. 10) indicate the distance found to exist'between the dotted lines on each side of the letter M on the pattern 131. Likewise the marks 137 and 138 (Fig. 10) indicate the distance between the dotted lines on each side of the letter 1 (shown as being en gaged by the tracer on the pattern plate 131). In the same way the operator lays off on the paper strip markings of respective letter spaces which indicate the total amount of space occupied by the letters as shown by t e pattern plate, including'the desired e first takes his space between words, and as the operator space and the letters on the lay-out strip 135 are for the words Milk products. The lettering on: thefstripmay be roughly done, but the space} markings such as 136, 137 and 138 should be-l'accurately done so as to have the lettering properly spaced apart in the fin ished work.

' i, The strip 135 is then secured upon the pe ripher of the wheel 122, as by means of any suitab e adhesive on the underside of the lay-out strip near its ends. The plate 98 to be engraved is clamped in its desired position. The pattern plate is next clamped in osition with the letter M opposite the openmg 128 in the table, and the tracer is placed in the right-hand space mark associated with the letter M, this mark being shown by a dotted line on plate 131. Then by means of the hand lever 127 the plate 98 is moved laterally until the desired lace for beginning the line is reached. he hand-nut or clam 123 is then released and the wheel 122 is freely turned, without turning the shaft 115, by turning the hand-lever 127 in one. direction or the'other, until the letter M on' the lay-out strip comes opposite the letter M on the pattern plate, with one of the marks 136 or 137 opposite the corresponding mark shown by dotted lines at the sides of the letter M on the pattern plate 131. Owing to the curvature of the strip 135 as it is positioned on the wheel 122 the lines 136 and 137 will not accurately coincide with the corresponding marks on the pattern plate, and it is therefore referable'to work from only one of the mar s 136 or 137, and preferably the first one in the order of movement, that is, mark 136 for the letter M, mark 137 for the letter I, mark 138 for the letter L, etc. Having then brought the mark 136 opposite the corresponding mark associated with the letter M on the pattern plate the hand clamp 123 is tightened and thereafter remains tightened until that line is engraved. The result of such tightening is that for every movement of the wheel 122 the work plate 98 will be moved, and in the same direction as the wheel 122 moves at the top.

It may be mentioned in this connection that if the wheel 122 were inadvertently moved too far in the clockwise direction as whereby the letters on the lay-out strip are always brought up. to the exact place desired by the same kind of movement of the wheel 122. This is because all such mechanisms have/a certain amount of play or lost motion, especially where gears are employed, and by using the same movement 'of the wheel 122. as clockwise, to advance the various parts in their respective progressive movements disparities in the engraving due to such slight but inavoidable looseness will be avoided.

The next step is to locate the work plate as 98 in the direction of the guides 92. The

tracer is placed in the lowermost part of the design of the letter M, that is, at the place corresponding to the position shown as being occupied by the tracer in the letter I in Fig. 1. The plate to be engraved is then moved by hand on the guides 92 until the desired position'of the same part of the letter M is directly beneath the graver point 30.

In the ensuing engraving operation the operator rests his hands on the handle bars 58 forcing them downward and making electrical contact at 53,- Fig. 5, as hereinabove connections.

explained, inducing downward movement of I the ver 30 into contact with the work plate 98. 'It may be mentioned here that the tracer 64: is moved into the recess definingthe pattern to be reproduced against the springmess of the pantograph arms and Ordinarily this tracer oint 64 will be away from the surface 0 the pattern late a very small distance, say about a sixty-fourth of an inch. 'The spring 60, Fig. 5, has sufiicient strength to develo the desired springiness of the panto rapii arms and connections whereby when ownward pressure is applied to the handle bars the first action is to move the tracer point into the design to be traced and thereupon additional pressure upon the handle bars forces the collar 57 downward so as to make the electrical contacts at 53 respectively and the collar enlargement 61. The movement of the tracer is through such a short distance that adjustments could be made where by the electrical contact is made before the tracer actually reaches the bottom of the groove definingthe design, or the parts could be so a justed that the tracer normally rests at the bottom of the design, in which case it would be lifted from one letter 0 another by upward pressure on the handle ars.

Since the distance for the tracer to be moved downwardly is very slight, the result in my actual practice is that substantially simultaneously with the depression of the contact collar 61 the tracer 64 comes into the bottom of the design to be traced, and thereupon the operator simply moves the tracer point 64 in the oove or grooves of the pattern plate defining that letter.

At the same time, due to the electrical contact made as hereinabove mentioned, the diamond point of the graver 30 contacts the movements, the desired design is marked upon the prepared plate, ex osing the metal for the etching process. he amount of descent to be provided for the raver 30 is determinable by the position of the adiusting nut 79 of Fig. 7. It is mentioned that according to the construction illustrated the descent of the graver may be a very small amount, indeed, for instance, a thirtysecond of an inch or less, and this is important since if the graver were to strike the work with a considerable impact it would make a mark at the point of contact other than the very fine one which might be desired.

Having reproduced the letter M the clamp 133 is released and the attern plate 1s moved to bring the letter into position to be traced. In doing this the most advanced of the space indicating lines as 140 for the letter I is brought 0 posite the most advanced marking, name y 136 for the letter M. (This position is not illustrated.) The plate 131 is then clamped in that tion and the wheel 122 is next moved 0 00kwise so that the mark 137 of the'lay-out strip comes opposite the mark 140, as shown. This movement of the wheel 122 caused a corresponding movement of the work plate 98, and thereupon the letter 1 ma be traced. The wheel 122 is then allowed to remain quiescent while the pattern plate is again moved so that the most advanced space marking for the letter L, that is, the line 141, comes opposite the line 137 on the layout strip, and thereupon the pattern plate is held fast and the mark 138 on the lay-out strip is brought opposite the mark 141 by turning the wheel 122. In the same way all of the letters are successively reproduced.

Since the pantograph is capableof reproducing the design in relatively large or relatively small form means are provided for moving the work plate 98 various amounts relative to the amount of movement of the periphery of the wheel 122. These means include the

various ears

110, 111, 112, etc. and the rack 113. t is evident that if the rack113 were operatively in engagement with the gear 111 the movement of the plate 98 would be greater with a given movementot the periphery of the wheel 122 than if therack 113 were in e agement with the larger gear 110.

Means for further adjusting the amount of movement of the work plate under a given movement of the periphery of the wheel 122 include the three gears of different sizes shown in Fig. 2, according to which the amount of plate movement may be varied several times between that which would be provided by simply shifting the rack 113 from one to the next adjacent one of the

gears

110, 111, 112, etc. That is to say, if, for instance, the rack 113 were in engagement with the gear 111 and the rack 100 were in engagement with the gear 102, and then the rack 113 were moved into engagement with the gear 110 thus causing the plate 98 to move say, for instance, an eighth of an inch less with a given movement of the wheel 122, then if the rack 100 were moved into operative contact with the pinion 103 the distance which the plate 98 would move would be less than the assumed eighth of an inch, and if the rack 100 were moved into contact with the pinion 104 the movement of the work plate would be still less than the assumed eighth of an inch. According to these means an exceedingly fine and close adjustment may be had of the movement of the work plate re'ative to that of the wheel 122.

. The pattern plate'may have its letters of any convenient size, say an inch to two inches in width, while the engraved result osimay have its, letters only a sixteenth of an inch in width or less. lihe adjustments of the pantog'raph arms determines size and other characters of the letters while the adjustment of the racks 100 and 113 with the respective gears determines the proportionate spacing of the letters and the lerigth of the engraved line.

t may he pointed out that with a given pattern plate such as 131 showing pattern letters in ordinary form a great variety of letters may be produced through the action of the pantograph. That is to say, the letters reproduced may be relatively low and wide, or they may be relatively narrow and high, or they may be of the same form as shown by the pattern plate, or they may be caused to slant in one direction or the other, and in all instances in a multitude of sizes and degrees.

Another highly important feature of the device is in the fact that the tracer always operates in a small locality. This is not only a great advantage from the standpoint of ease and ceerity of production, the operator being enabled to sit comfortably at his work and perform all of his movements immediatel before him in this small locality, but it is highly important also from the standpoint of the results since the pantograph is always operating in what may be termed its normal position or within its accurate range. The engraving is therefore tree from distortions due to operating the pantograph at its extreme limits.

According to my own construction of the device a continuous line 11 inches long may be engraved without resetting the lay-out strip or changing the location of the work. This indicates that it is simply a matter of size and proportions to provide a device capable of engraving lines of substantially any length desired as a substantially con tinuous operation.

Another important feature is in the fact that the work plate and the tracer are on the same or substantially the same horizontal plane, giving the Operator full control of the instrument and rendering the result on the pattern plate visible to him at all times. According to my construction the graver is about 15 inches from the tracer. The operator may remain seated not only until a given line is engraved but until the entire plate is finished, and be constantly in view of the results.

Another important advantage fact that the graver is always in its normal vertical position with respect to the plate to be engraved and is never obliged to assume a slanting position which would militate against the results.

Since the graver is automatically raised by the sprin 82, Figs 7, when contact is broken by allo is in the 7 Wing the handle bars 5 to 'ond trial is made.

rise, the operator is saved much work which exists in cases where the graver must be removed from the work by hand or by a foot pedal. Furthermore the automatic and substantially instantaneous movement of the graver away from the work renders it substantially impossible for the operator to deface the plate by makin a scratch therein. Relatively unskille operators can use the present machine with safety to the work and at a relatively high rate of production. The fact that the pattern plate may be moved and adjusted so readily decreases the labor involved and increases the output in a given time.

An important feature of the construction 'is in the fact that the operator, having his tape in position on the wheel 122, can adjust the machine in an exceedingly brief s ace of time fo any particular length of line desired on a plate within the limits of the construction. Knowing the length of this line as it is to appear on the plate it is only necessary for him to move the plate by means of the hand lever 127 until the graver is over the beginning of the line, then adjust the wheel 122 by means of the hand lock 123, without moving the work, so that the beginning of the tape is at the .normal starting point at the top of the wheel, and then clamp and turn the wheel until the end of the ta e is reached. If such turning has moved t e plate too far or not far.

enough the

racks

113 and 110 are shifted by a simple movement of the hand and a sec- By means of the close adjustment provided by the parts shown in Fig. 2 it is only a matter of one or two trials before the exact adjustment is had. This eliminates a large amount of slow and tedious measuring and computation heretofore necessary,

Having thus determined the length of line the operator may vary the height or other character of the letters according to the adjustments of the pantograph. Since the pantograph is an instrument well known no particular instruction needs to be given in regard to its adjustments to provide any desired results; but it may be observed that the pantograph arms may be marked with a scale such as indicated on these arms respectively in Fig. 1 whereby particular results may be had by adjustments made according to the several scales. If the pantograph be set for distortion of the engraved letters the distortions will be relatively the same for each succeeding letter owing to the fact that the tracer is always operated in a small central area. Another valuable feature is that such distorted letters will appear on the work in a straight line.

It will be apparant to those skilled in the art that various changes, modifications and departures ma be made from what is herenewness in specifically illustrated and described withm the s irit of the invention and reference shoul be had to the appended claims to determine what I contemplate as being included in the invention thus set forth.

I claim:

1. In an engraving machine, the combination of means forming a pantograph having a tracer and a raver, means for holding in an operative redation to the graver the material to be engraved, means for holding in an operative relation to the tracer an object having the design to be traced, the tracer being mounted for movement b hand toward and away from the object aving the design to be traced when such object is held in its operative relation to the tracer, hand-operable means for moving the tracer, the graver being mounted for movement towar and away from the material to be engraved when such material is held in its operative relation to the graver, and means including said hand-operable means and an electro-magnet for inducing movement of the graver into contact with such material properly positioned after the tracer has been moved into contact with the design properly positioned and by a further movement of said hand operable means, and for inducin movement of the graver away from such material when said hand operable means are movable i n the reverse direction.

2. In an engraving machine, the combination of means formin a pantograph substantially horizontally isposed and having a tracer and a graver, each substantially vertically disposed, means for holding in an operative relation to thegraver the material to be engraved, meansfor holding in an operative relation to, the tracer an object having the design to be traced, the tracer bein mounted for movement by hand toward an away from the object having the design to be traced when such object is held in its operative relation to the tracer, hand-operable means for moving the tracer, the graver being mounted for movement toward and away from the material to be engraved when such material is held in its operative relation to the graver, and means under the control of said hand-operable means for releasing the graver for gravitational movement into contact with such material properly positioned after the tracer has been moved in contact with and by a further movement of saidhand-operable means, the

lit)

device and in an o erative relation to at amines rious designs thereon whic may successively be traced, means for holdin a lay-out strip for movement relative to t e pattern plate when the pattern plate is held in a given position for use, the pattern plate being mounted for adjusting movements relative to the tracer when the tracer is in'a iven operative position, said lay-out strip aving space markings thereon substantially corresponding with space markings on the pattern plate, the lay-out strip having between adgacent of its space markings indications oi the subject matter to be en aved, which in= dications indicate particu er designs upon the pattern plate between corresponding space markings thereon, the arrangement being such that the pattern plate "may he moved so as to bring any particular design thereon to a given position in the vicinity of the tracer at a given relative position of the tracer and the lay-out strip may then be moved to bring a corresponding indication opposite such particular design with a space marking on the pattern plate corresponding to a space marking on the la out strip, and means under the control of the movement or" the lay-out strip for moving the holder for the plate to be engraved whereby with each successive and progressive movement of the lay-out strip the holder for the plate to be engraved will also be successively and progressively moved.

i. In an engraving machine, the combination of means forming a pantograph having a tracer and a graver, a pattern device for the tracer to operate upon, a movable holder for a lay-out strip, shiftable means for holding in association with the graver a plate to be engraved, and means for simultaneously shifting the holder for the plate to be engraved and for moving the lay-out-strip holder. p

1 5. in an engraving machine, the combination of means forming a pantograph having a tracer and a graver, a pattern device for the tracer to operate upon, a rotatable holder having an arcuate surface adapted to accommodate a layout strip, shiftable means for holding in amociation with the graver a plate to be engraved, and means under the control of the rotative movement of the lay-out-strip-holder for shifting the plate holder.

1,6. In an engraving machine, the combination of means forming a pantograph having a tracer and a graver, a pattern evioe for the tracer to operate upon, a rotatable holder h'aving an arouate surface adapted to accommwate a lay-out strip and arranged to exhibit a portion thereof closely adjacent to said pattern device, shiftable means for holding in association with the raver a plate to M'engraved, and means lor simultaneously moving the plate holder and for rotating the lay-out strip holder.

7. In an engraving machine, the combination of means forming a panto raph having a tracer and a graver, a shtable holder for holding in association with the graver' a plate to be enved, means for adjustably holding a pattern plate whereby various portions thereof may brought to a common relative position to be operated upon by the tracer, means for holdm a lay-out strip for movement relative to t at part of the pattern plate which is at such common relativeposition, and means under the controlof the movement of the lay-outstripholding means for-shifting the holder for the plate to be 8. In an engraving machine, the combination of means forming a pantograph substantially horizontally disposed and having a tracer and a graver each substantially vertically disposed, a shiftable substantially horizontally disposed holder for holding in amociation with the graver a plate to be engraved, means for adjustabl holding a pattern plate substantially horizontally in association with the tracer, a wheel rot-stably mounted on a substantially horizontal axis for holdi a lay-out strip for arcuate movement relative to the pattern plate at a given place on the pattern plate and means for simultaneously moving said wheel with a rotative movement and for shifting the holder for the plate a be engraved.

9. In an engraving machine, the combination of means formin a pantogra h substantially horizontally did and aving a tracer ar t a graver each substantially vertically disposed, a shiftable substantially horizontally disposed holder for holding in association with the graver a plate to be engraved, means for ad'ustably holding a pattern plate substantially horizontally in association with the tracer, a rotatable wheel for holding a lay-out strip for arcuate movement relative to the pattern plate at a given place on the pattern plate, means for simultaneously movin said wheel with a rotative movement and or shifting the holder for the plate to be engraved, the tracer and the graver each being mounted for relative movement toward and away from the patllllll Mill the movements of the tracer-moving means toward and away from the pattern plate for controlling the movements of the graver respectively toward and away from the plate to be engraved.

10. In an engraving machine having a tracer and a raver and means for moving the tracer by hand toward and away from a design to be traced, the combination therewith of electrical mears including a normally open circuit and a make-and-breakcontact device controlled by the movement of the tracer-moving means toward and away from the design to be traced for inducing respective movements of the graver toward and away from the object to be engraved.

11. In a pantograph type of engraving machine having a tracer and a graver an means for moving the tracer by hand toward and away from a design to be traced, the grave! being mounted for relative move ment toward and away from the object to be engraved, the combination therewith of electrical means including a normally open circuit and a make-and-break-contact device controlled by the movement of the tracermoving means toward and away from the design to be traced and also'a magnet controlling the movements of the graver.toward and away from the object to be engraved, for causing the graver to move toward the object to be engraved when the tracer-moving means are moved toward the design to be traced.

12. In an engraving machine, the combination of a substantially vertically-disposed gravel adapted to be moved toward and away from the object to be engraved, spring means for holding the graver releasably in elevated position out of contact with the object to be engraved, and magnet means for releasing the graver from the sustaining action of said spring for gravitational movement into contact with the object to be engrayed.

13. In an engraving machine, the combination of a substantially vertically-disposed graver adapted to be moved toward and away from the object to be engraved, means for holding releasably the graver in elevated position out of contact with the objcct to be engraved, a normally open circuit, and a magnet in said circuit for releasing said graver-holding means, the arrange ment being such that energizing the magnet releases the graver for gravitational movement into contact with the object to be en graved.

14. In an engraving machine, the combination of a substantially vertically-disposed graver adapted to be moved toward and away from the object to be engraved, spring means for holding the raver releasably in elevated position out 0 contact with the object to be engraved, an electro-magnet for releasing the graver from the sustamm action of said spring for ravitationamovement into contact with t e object to be engraved when the magnet is energized, a hand-operable tracer, and means under the control of the operators hand while 1n position to move the tracer for making an electrical contact to energize the magnet to release the graver. v

15. In an engraving machine, the combination of means formmg a pantograph having a tracer and a graver, a shiftable holder for a plate to be engraved by the. graver, and means for shifting the plate holder, said last-mentioned means including a rack,

a gear meshing therewith, and means for rotating the gear.

16. In an engraving machine, the combination of means forming a pantograph having atracer and a graver, a shiftable holder for holding a plate to be engraved by the graver, a hand-rotatable shaft, and adjustable means for shifting the plate holder various amounts relative to a given amount of rotative movement of the hand-rotatable shaft.

17. In an engraving machine, the combination of means forming a pantograph having a tracer and a graver, a shiftable holder for holdin a plate to be engraved by the graver, a and-rotatable shaft, a lay-outstrip-holding wheel on said hand-rotatable sha and means under the control of said hand-rotatable shaft for shifting the plate holder.

18. lln an engraving machine, the combination of means forming a pantograph having a tracer and a graver, a shiftable holder for holding a plate to be engraved by the graver, a hand-operable lay-'out-stripholder adapted to be moved relatively to bring various portions thereof successively to a common relative position, and means under the control ofthe movements of said lay-out-strip-holder for shifting the plate holder various amounts relative to a given amount of movement of the lay-out-stripholder.

19. lln an engraving machine, the combination of means forming a pantograph having a tracer and a graver, a shiftable holder for holding a plate to be engraved by the graver, a hand-operable lay-out-strip-holder.

adapted to be moved relatively to bring various portions thereof successively to a common relative position in the vicinity of the tracer, and means for holding a pattern adjustably so as to bring its several parts to be traced into a relatively small area in the vicinity of the tracer, the arrangement being such that the tracer may always operate in a given relatively small area.

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