US2163271A - Engraving apparatus - Google Patents

Description

June 20, 1939a J 300 2,163,271

smemvme APPARATUS -Filed Aug. 15, 1938 5 Sheets-Sheet. l

I INVENTOR EVERETT J. COOK A TTORNE Y June 20, 1 939.

5 Sheet-Sheet 2 Filed Aug. 15. 1938 v W mm um wm Y &W 8 8 s nm 3 Q S m- .5 um I 0 n mm 0 bn m m mm 8 3 Q ow 3 mm 3 mm A 3 mm. 2 mm vw mm. mm .5 m o. 9

I NVENTOR E ERETT J 620K ATTORNEY. f

June 2 1939- E. J. cooK ENGRAVING APPARATUS Filed Aug. 15 1938 5 Sheets-Sheet 3 INVENTOR EVERETT J FIG; 9.

ATTORNEYS June 20, 1939'.

E. J. COOK Eusmvme APPARATUS Filed Aug. 15, .1938

5 Sheets-Sheet 4 INVENTOR EVERETT J.

ATTORNEY June 20-, 1939. E. J. cooK ENGRAVING -APPARATUS ,Filed Aug. 15, 1938 5 Sheets-Sheet 5 INVENTOR EVERETT J. COOK ATTORNEY Patented June 20, 1939 UNITED STATES- PATENT v orries nNGnAvmG APPARATUS Everett J. Cook, Toledo, Ohio, assignor to H. H. I

Buggie a Company,- Toledo, Ohio, at corpora-,

tion of Ohio Application August 15, 1938, Serial No. 224,986

27 Claims. o1. 51-100) This invention relates generally to engraving machines and refers more particularly to improvements in engraving apparatus of the type set forth in my copending application Serialv 5 No. 165,382, filed September 23, 1937.

It is one of the'principal objects of this invention to provide improved means responsive to changes in contour of the surface of the article to be engraved toeiiect the relative movement 10- of the article and engraving tool required to maintain the same relationship between the article and tool, irrespective of variations in the contour of the surface of the article traversed by the tool. The above arrangement is particularly 1, advantageous when engraving articles having contoured or irregular surfaces, since it offersthe possibility of providing an engraving of uniform depth in these surfaces, irrespective of irregularities or changes in shape of the latter.

- Another advantageous feature of this inven-- 90 Still another object of this invention resides in the provision of an engraving machine wherein the article is normally .yieldably urged into engagement with an abutment positioned adjacent the engraving tool and wherein the article is -35 fulcrumed about the abutment either toward or away from the tool, depending upon the-contour of the surface of the article traversed by the tool.

A further feature of the present invention consists in the provision of an engraving machine of '0 the character set forth above having a pattern corresponding in shape to the article to be engraved and having means operated by the surface of the pattern for effecting the relative movement of the article and tool required to maintain the 45 same relationship between the latter, irrespective of variations in the shape of the article.

Still another object of the invention resides in the provision of an engraving machine wherein the pattern moves as a unit with the article and 50 wherein the mechanism for moving thearticle relative to the tool is controlled by a follower engageable with the pattemsurface at a point corresponding to the point of engagement of the engraving tool with the article. j

In addition to the foregoing, the present invention contemplates improved means for effecting relative movement between the article and tool in a manner that the tool traverses the surface of the article to be engraved.

The foregoing, as well as other objects, will be- 5 made more apparent as this description proceeds,

especially when considered in connection with the accompanying drawings, wherein:-

' Figure 1 is a front elevational view, partly in section, of an engraving machine constructed in accordance with this invention; t

Figure 2 is a fragmentary plan view of the machine shown in Figure 1 having certain parts broken away for the sake of clearness;

Figure 3 is an enlarged vertical sectional view taken substantially on the plane indicated by the line 33 of Figure l;

Figure 4 is an end elevational view of the machine having certain parts broken away for the sake of clearness; I Figure 5 is a sectional view taken substantially on the plane indicated by the line 5-5 of Figure 1; v

, Figure 6 is an enlarged elevational view showing two different positions of the article during the engraving operation;

Figure 7 is a top plan view of the article feeding machine having certain parts broken away for the sake of clearness;

Figure8 is a sectional view taken substantially a0 on the plane indicated by the line 8 8 of Figure 7;

Figure 9 is a diagram of the electrical circuit for controlling the work carriage;

Figure 10 is a section on the line lll -|0 of Figure 3;

Figure 11 is a semi-diagrammatic view illustrating a slightly modified form of-con structiont Although it will be understood as this descrip- ,tion proceeds that my improved engraving ap- 4o paratus may be advantageously employed to engrave various different types of articles, nevertheless, for the purpose of illustration, I have shown an engraving machine especially designed to engrave glassware, such as tumblers and the like. It will also be understood as this description pro- .ceeds that while the machine selected herein for Tool supporting means In the present instance, the tools B for each pair of adjacent tumblers A are secured to the opposite ends of a shaft l5 and the latter, in turn, constitutes the drive shaft of a suitable high-speed electric motor Hi. In other words, an electric motor i6 having a double-ended drive shaft is provided for each pair of tumblers A and a tool B is secured to each end of the drive" shaft opposite the surfaces of the tumblers to be engraved. Upon reference to Figure 3, it will be noted that the motors are secured to the oscillating beam C by means of brackets l1 and are movable by the beam in directions toward and away from the glass'tumblers. This construction provides a direct drive for the tools and is advantageous in that it not only insures more effective operation of the tools but, in addition, offers the possibility of eliminating the usual complicated arrangement of belts or similar driving connections.

Upon reference to Figure 5, it will be noted that the beam 0 is supported adjacent its longitudinal edges on bars [8 having the opposite edges Vshaped and'respectively engaging correspo'ndingly shaped grooves i9 in the bottom surface of the beam 0 and adjacent portions of the machine frame. As pointed out in my copending application Serial No. 165,382, the construction is such as to reduce the friction offered to oscillation of the beam to a minimum and at the same time provide a stable support for the beam. It will be observed from Figure 1 that the stability of the beam C is-further insured by suspending weights 2!! from the beam through the medium of chains 2|. The arrangement is such that the action of the beam is stabilized without increasing the'inertia of the latter, and this is desirable in that it minimizes the power necessary for oscillating the beam.

Tool operating mechanism In the interests of simplicity, the mechanism selected herein for oscillating the beam C and tools B connected thereto is the same as the mechanism described in detail in my copending application Serial No. 165,382, flIed September 23, 1937. Briefly described, however, the beam C is moved in a direction to engage the tools B with the articles of glassware A by means of an electromagnet D and is moved in the opposite direction by means of a spring E. In other words, when the electrom g et D is energized, the beam 0 is moved toward the front side of the machine to cause the tools B to move into engagement with the articles of glassware A, and when the electromagnet is de-energlzed, the spring E moves the beam 0 in the opposite direction to cause the tools B to travel away from the articles of glassware A. Upon reference to Figure 5, it will be noted that the electromagnet D is shown as having a magnetic field 22 and a load coil 23 secured to a plunger 24 which, in turn, is mounted in the core 25 of the electromagnetfor sliding movement into and out of the field 22. The arrangement is such that movement of the load coil 23 into the field 22 against theaction of the spring E' effects a movement of the tool carrying beam C in a direction toward the glass tumblers A, through an operative connection 26 between the plunger 24 and the outer edge of the beam C. In general, the operative connection includes a lever 21 118V,- ing thelower end connected to the plunger 24 and having the upper end fulcrumed on a tapered adjustable pin 29. Also, the connection 26 includes a second lever 29 having the lower end pivotally connected between the fulcrum 26- and the plunger 24 by means of a link 39. The

upper end of the second lever29 is provided with a hooked portion 3| having a V-shaped projection 32 fulcrumed in a correspondingly shaped groove 33 formed in a member 34 which is fixed to the machine frame. A stud 35 is secured to the lever 29 intermediate the ends of the latter and is, provided at its forward end with a conical portion 36 adapted to contact an adjustable insert 31 secured to the beam C at the'rear side of the latter intermediate the ends of the same. The adjustable insert 31 is maintained into engagement with the forward end of the stud 36 by means of the springs 38 having the forward ends secured to the beam C and having the rear ends secured to the machine frame through the medium of adjustable'studs 39.

With the above construction, it will benoted that when the load coil 23 is energized, the

plunger 24, together with the coil, is moved ina direction toward the glass tumblers A into the .field 22. .The lower end of the lever 21 is correspondingly moved in the same direction about its fulcrum 28 and the lever 29 is moved by the lever 21 in a forward direction about its fulcrum 33. As a result, the beam. 0 is moved in Tool control means -In general, the operation of the electromagnet D is controlled in accordance with the design or recordit is desired to reproduce on the glass tumblers A and, in the present instance, the.

record or design is carried by a revoluble drum F, shown in Figure 5 as supported at one end of the machine. In the present instance, the

characters or'record applied to the drum F areshaded and are scanned by means of an optical unit G supported opposite the drum F. Upon reference to Figure 5, it will be noted that the optical unit G comprises principally a projector H and a pair of photoelectric cells I. The projector H has a source of illumination in the form of an electric light bulb J adjustably supported at the rear end of the lens barrel K and is also provided with condenser'lenses L for directing the light through the aperture M formed in a disc supported in the barrel K at the front side of the lenses L. The light passing through the aperture M is focused by the objective lenses N on the surface of the drum F upon which the record or pattern is applied. It will be understood from the foregoing that the light projected by the lenses N is in the form of a beam having an extremely small area on the surface of the record, and the light reflected from the surface of the record is intercepted by the photoelectric cells I supported on the optical unit 6 at opposite sides of the front end of the lens barrel K. 'The photoelectric cells I are rendered conductive when the beam of light from the projector intercepts a light portion of the reco'r'd or design on the drum 1" and 'are rendered nonconductive when the beam of light intercepts a dark portion of the record. when thephotoelectric cells are conducting, an electron fiow is effected from the cathodes of the cells to the anodes of the latter in proportion to the intensity of light reflected from the record and the resulting flow of current through the photoelectric cells is amplified by an amplifier, designated generally in the drawings by the reference character O. The particular amplifier 0 employed is preferably identical to the one described in detail in my above identified copending application and, since this amplifier forms no part of the present invention, it is not shown or described in detail. It will sufi'lce to point out that the last stage of the amplifier circuit is rendered non-conductive when the beam of prothe illuminated portions of the record. On the other hand, when the beam of projected light intercepts the darker portions of the record on the drum F, the last stage of the amplifier is rendered conductive and, as a result, a relatively high current flows through the plate circuit sufiicient to energize the electr'omagnet D and move the tools B toward the glass tumblers A. It will, of course, be understood that the amplifier may be designed to provide the opposite effect without departing from the spirit and scope of this invention. This may be readily accomplished in the manner set forth in the Thorpe application Serial No. 146,943, filed June',7, 1937, so that the tools B move into engagement with the workwhen the light sensitive cell is rendered conductive and more outof engagement with the work when the cell is rendered non-conductive.

Supporting means for record and glassware A Upon reference to Figures 3, 4, 5 and 6, it will be noted that the articles of glassware A to be engraved and the drum F, carrying the design or characters to be reproduced, are mounted upon a carriage 40 which, in turn, is mounted for vertical sliding movement on a' column, 4] of the machine frame. The manner in which the carriage is fed vertically will be more fully hereinafter set forth and itv will sufiice to bring out at this time that the purpose of the vertical feed ing of the carriage is, of course, to bring different portions of the record carrying drum F and glass tumblers A throughout, the length thereof into registration respectively with the optical unit G and tools B. Also, of'course, the record carrying drum .Fand articles of glassware A are rotated during vertical travelof the carriage so that the entire record on the drum F is scanned by the optical unit G and reproduced on the articles of glassware A by the tools B.

Upon reference to Figure 5, it will be noted that V the record carrying drum F is secured to the upper end of av vertical shaft 42 having a worm wheel 43 secured to the lower end thereof and meshing with a worm 44 shown in Figure 2 as being secured to a horizontal shaft 4| extendin for substantially the full length of the machine. The shaft 45 is supported at Spaced points along the length thereof in suitable bearings mounted on the carriage 4|, and the end of this ,shaft opposite the end upon which the worm away from the optical unit G. Upon reference to Figure 2, it will be noted that the bracket portion 50 is bifurcated and the furcations ii are journalled on the shaft 44 at opposite sides of the worm 44. It follows from the above that the record carrying drum F may be adjusted relative to the optical unit G and, in the present instance, is secured in its proper position by means of suitableset screws 5! shown in Figure, 5 as being positioned to hold the drum 1'' from swinging movement about the shaft "after they desired adjustment is attained.

Referring now to Figure 3, it will be noted that each ofthe articles of glassware A issupported in an inverted position upon a revoluble disc 53 of flexible material and the latter, in turn, is secured to a hub 54 having a barrel portion 55 lower end of each sleeve 49' is also provided with furcations 5| journalled on the drive shaft 45 on opposite sides of a worm 56 identical to the worm 44 and adapted to mesh with a worm wheel 51 secured to the lower end ofthe barrel portion 55. Each of the worms 56 is secured to the shaft so that rotation of the latter eflects arotation of the glass tumblers, as well as the record carrying drum F. In the present instance, the

record carrying drum F and the glass tumblersspective tools B by means of springs 58 havin the upper ends engaged by adjustableset'screws 59' in lugs 60 on each of the bracket portions and having the lower ends engaging projections 50 on the carriage 40. The lugs 60 are so positioned on the bracket portions with respect to the axis of the shaft 45 to provide for swinging movement of the glass tumblers A in a direction toward their respective tools by the springs 58.

The movement of each glass tumbler A toward its respective tool B by .the associated spring 58 is limited by means of a positioning member or feeler Bi having a tapered forward end portion 62 engageable with the rear side of the glass tumbler at a point in close proximity to the point of engagement of the tool B with the tumbler. The location of the feelers ii is such that these feelers oppose the action of the springs 58 and definitely .normally independently urged toward their re- I limit the extent of movement of the tumblers A means of a control wheel 54 having notches '65 in the periphery thereof adaptedtocooperate feelers relative to the tool, but to also indicate predetermined increments of adjustment of the feelers. v

' In accordance with the present invention, the

surface of each tumbler A is adjusted relative to the adjacent tool in dependence upon variations in the shape of the surface so that substantially the same relationship between the tools and surfaces of the articles A is maintained throughout the engraving process, irrespective of variations in the contour of the surfaces. The mamier in which the foregoing is accomplished will perhaps be better understood upon examining Figure 6 of the drawings, wherein two positions of ad justment of one of the glass tumblers A is illustrated. Upon reference to Figure 6, it will be noted that as the glass tumbler A is moved upwardly by the carriage 40 from the full lineposition thereof, the feeler 6| engages the outwardly bowed surface 69 of the tumbler and swings the tumbler in a direction against the action of the spring 58. In'performing this function, the relative positions of the tool B and portion 89 of the surface is changed to such an extent that the depth of the cut of the tool B would become less if some provision were not made to compensate for this change. However, the present invention compensates for this variation by effecting a movement of the carriage 48 in the direction of the arrow 10 on the horizontal ways ll, shown in Figure 4 as mounted on the top of a second vertically movable carriage 12-. As the glass tumbler moves in the direction of the-arrow 18, the tumbler, in effect, fulcrums about the point of engagement of the feeler 6| with the surface 69 of the tumbler in a corresponding direction. As a result, the surface of the tumbler immediately adjacent the cutting portion of the tool B is moved toward the tool and the extent of this movement is accurately determined to maintain the original selected relationship between the tool B and surface of the tumbler.

When the tumbler A has assumed the dotted line position shown in Figure 6, the feeler 6| allows the tumbler A to swing in a direction toward the tool the extent determined by the curvature of the surface 13. As a consequence, the carriage 40 is moved relative to the carriage I2 in the direction of the arrow I4 with the result that the glass tumbler A fulcrums about the free end of the feeler 6| in a direction against the action of the spring 58 until the surface 13 assumes its pre-selected relationship with reference to the tool B. The foregoing action of the glass tumbler A in Figure 6 is, of course, true of all of the tumblers mounted on the carriage 40.

It will be remembered that reference has been made above to the fact that the record carrying drum F is supported on the carriage 48 in a manner to move as a unit therewith. It follows, therefore, that some provision must be made to permit horizontal movement of the drum F by the carriage 48 without interference by the optical system and without changing the relationship between the latter and record. This is accomplished in the present instance by mounting the optical system on a plate P supported on the machine frame adjacent the carriage for horizontal sliding movement 'as a unit with the carriage 40. As shown in Figure 5, a roller Q is mounted on the optical unit G in a position to engage the record carrying drum F and this roller is held into engagement with the adiacent surface of the drum by a spring R normally urging the plate P in a direction toward the drum F. As a result, the optical system G follows the carriage 40' throughout its horizontal travel and the focal distance is maintained the same irrespective of said horizontal movement. This is desirable in that it insures uniform operation of the light sensitive cells and thereby insures more satisfactory results.

' Control means for horizontal carriage 40 In the present instance, movement of the car- .15 which may either be aglass tumbler, or a replica of the latter. In any event, the templet corresponds exactly in shape and size to the glass tumblers A and is mounted in exactly the same manner as the glass tumblers A. Inother words, the templet I5 is rotated at the same speed as the glass tumbler A by the shaft 45 and is capable of swinging movement about the axis of the shaft 45. A spring identical to the springs 58 is provided for urging the templet I5 into abutting engagement with a feeler 16 identical to the feelers GI and adapted to engage the adjacent surface of the templet 15 at a point correspondingto the point of engagement of the feelers 8| with the glass tumblers A.

with a three-phase alternating current motor 18 and operates a-relay 80 to reverse'the direction of rotation of the motor I8 in response to movement of the spring finger 18 by the surface of the templet 15. The switch is of a type which is very sensitive to movement of the spring finger 18 so that a very slight displacement of this finger by the adjacent surface of the templet in one direc;

tion efl'ects rotation of the motor 19 in one direction and a slight movement of the spring finger in the opposite direction reverses the motor 19.

The motor 19 operates through suitable reduction gearing, shown in Figure 3, to reciprocate the carriage 48 on the carriage l2 and, as a consequence, the relationship between the surface of the glass tumblers A and their respective tools B is varied in dependence upon changes in the contour of the glass tumblersto maintain apre-se-. lected relationship, irrespective of the shape of the tumblers.

Upon reference to Figures 1 and 3, it will be worm wheel 81 is shown in Figure 3 as being'secured to an internally threaded sleeve 88 having the opposite ends iournalled in beafings 88 relative to the carriage I2. It will, of course, be

. ing connections between the motor and sleeve are carried by the carriage 49 for movement there- -toan intermediate shaft II5 mounted in the understood that the motor 19, sleeve 88, and drivwith as a unit.

Provision is made herein for initially adjusting the position of the'carriage 99 relative to the carriage 12 by manually manipulating the screwshaft 99 relative to the sleeve 98. As shown in Figure 3, the forward end of thescrew shaft 99 extends. beyond the front side of the carriage i2 and is rotatably supported in a bearing 9| fixed to the front side of the carriage I2. A handle 92 is secured to the screw shaft 99 beyond the bearing 9! to: provide for rotating the screw shaft relative to the sleeve 89' and thereby effect a sliding movement of the carriage 99 in one direction or the other, depending upon the direction of rotation of the shaft 99. It will, of course, be understood that some provision must be made for normally holding the shaft 99 against rotation,

and thisis accomplished by a friction clutch as comprising a plurality of pins 94 mounted in the hub of the handle 92 for sliding movement in a direction parallel to the axis of the screw shaft 99. The ends of the pins project beyond opposite faces of the hub on the handle 92 and frictionally engage suitable wear plates 95 freely slidably mounted on the screw' shaft 99. The rear plate 95 frictionally engages the front side of the housing for the bearing 9I and the front plate 95 is engaged by a manually operated control element 98 threaded on the extreme forward end of the shaft 99. The arrangement is such that when the control 99 is tightened onthe shaft 99, the latter is frictionally held against rotation by the clutch 93 and when the control 96 is loosened, the friction is decreased to such an extent as to permit manually operating theshaft 99 by the control 92. With this construction, the carriage 49 may be manually adjusted to obtain a predetermined initial setting of the glass tumblers A relative to their respective tools B. Of course, movement of the carriage 49 also effects a corresponding adjustment of the templet 15 relative to the feeler I9 and switch 11.

Operating mechanism for carriage 72 The carriage I2 is supported on vertically extending ways 91 formed in the machine frame and is adapted to be fed upwardly at a relatively slow rate of speed by means of an electric motor 98 through a variable speed transmission 99. Of

course, movement of the carriage 12 upwardly P effects a corresponding movement of the carriage 49 and of the parts mounted on the latter carriage. In detail, the lower end of the carriage I2 is provided with a nut I99 threaded upon a vertinoted that the drive shaft I95 of the motor 98 is provided with a worm I98 adapted to mesh with a worm wheel I9I located in the transmission housing I98 and secured to one end of a'shaft ,I99. The shaft I99 is suitably journalled in the housing I98 and the opposite end thereof is connectedto a countershaft II9 by means of a gear III secured to the shaft I99 and meshing with a,

gear II2 secured to the shaft H9. The countershait II9 has a gear II3 secured thereto adapted .to mesh with a relatively large gear Ill-secured housing I98 for sliding movement in opposite directions. When the gear. I I4 is in mesh with the gear I I3, the same also meshes with a pinion I I6 secured to the power take-off shaft I94, with the result that the vertical screw IN is rotated by the power take-01f shaft I94 in a direction relative to the nut I99 to move the carriage I2 upwardly at a relatively slow speed.

When the gear H4 is moved by the shaft H5 from the position thereof shown in Figure '7 in the direction of the arrow, it meshes with a second pinion III on the power take-off shaft and with a pinion II8 secured to a second countershaft I I9 supported in the case I98 in axial alignment with the countershaft H9. The countershaft I I9 has a spiral gear I29 secured thereto in intermeshing relation with a spiral gear I2I secured to the'motor shaft, and the ratio is such that the countershaft I I9 is rotated by the motor 98 at a faster speed than the countershaft. II9. Also, it willbe apparent upon viewing Figure 7 that the countershaft H9 is rotated in a direction opposite the direction of rotation of the countershaft II9, with the result that the screw IN is rotated relative to the nut I99 in a direction to .move the carriage downwardly at a relatively fast rate. I

In the foregoing description, reference was made to the fact that'the glass tumblers are supported in their inverted position on resilient discs, designated in Figure 3 by the reference character 53, 'The templet I5 is supported in an identical manner and provision is made herevin for not only accurately centering.,.the glass tumblers and templet on their respective discs, but to also--efiectively clamp the same to the discs. Upon reference to Figure 3, it will be noted that a centering device I25 is secured on the upper end of each sleeve 55 above the disc 53. As shown in Figure 10, the centering device comprises a plurality of rubber bumpers I26 spaced from each other circumferentially of the device and adapted to frictionally engage the inner surface of the article adjacentthe open end of the latter. Each of thebur'npers I26 is carried by a suitable sleeve I21 adjustable relative to the device I25 to vary the positions of the bumpers and held in place by frictional engagement with the device I25.

The glass tumblers, as ,well as the templet I5, are efiectively clamped'against the resilient discs 53; by suction. As shown in Figure 1, a vacuum line I28 is mounted on the carriage 49 and communicates with the interior of the templet I5 and each of the glass tumblers through the medium of a conduit,l29. It will, of course, be understood that the vacuum line extends for sub: stantially the full length of the carriage 49 and is connected to a suitable vacuum. pump. (not.

shown).

In Figure 11 of the drawings, I have shown a glass article of substantially different contour than the tumblers A previously discussed. The glass article in Figure 11 has a surface I39 which is substantially semi-spherical in shape and when engraving articles of this general contour, it may be desirable to feed the carriage 49 and control the vertical movement of the carriage 12 by the switch 11. This may be accomplished in a relaswitch in the circuit for the motor 98 and operating the reversing switch by the templet oper ated switch I! in the same manner defined in'the foregoing. description. When resorting to this -70 tively simple manner by connecting a reversing particular construction, the motor 19 for the transverse carriage is, of course, operated to feed the carriage MI at a constant rate toward the tool and is stopped in any suitable manner at the end of the feed. The motor!!! is then reversed to return the carriage 40 to its initial starting position in readiness for another cycle of operation. It follows'from the above that the principle of operation of the embodiment shown in Figurev 11 is the same as the one described above, with the exception that the articles are fed relative to the tools by the carriage 40 and the carriage I2 is operated in dependence upon changes in contour of the surface I30 to maintain a predetermined relationship between this surface and the adjacent tool throughout the engraving operation, irrespective of changes in shape of the surface.

What I claim as my invention is: 1. In apparatus for producing a design in the surface of an article, means supportingan article having a surface on which a record is to be reproduced, a tool supported opposite said surface of the article, means controlled by the record for relatively moving the article supporting means and tool toward and away from each other, means for, relativelymoving the article 2. In apparatus for producing a design in the surface of an article, means supporting a member carrying the 'design to be reproduced on the surface of the article, an optical system scanning the design and including a' light sensitive cell controlled by the design, a tool supported'opposite the surface of the article, means controlled by the light sensitive cell for relatively moving the tool and article toward and away from each other, and means operated in dependence upon changes in shape of the surface of the article to adjust the relative positions of said article and tool to maintain the same relationship between the surface of the article and tool'irrespective of variations in the surface contour of the surface.

3. In apparatus for producing a design in the surface of an article, means supporting an article having a surface on which a record is to be reproduced, a tool supported opposite said'surface 'of the article, means controlled by the design for relatively moving the article supporting said of the article, and meanscontrolled by the surface of said templet for. controlling the operation of the last named means.

4.'In apparatus for producing a design in the surface of an article, means supporting an article having a surface on which a record is to be reproduced, a tool supported opposite said surface '9 from the article, means controlled by the design of the article for movement toward and away for operating said tool, and means responsive to variations in contour of the article to move the article supporting means relative to the tool to maintain the same relationship between the tool and surface aforesaid of the article irrespective of changes in the contour of the .,urface.-

5. In apparatus for producing a design in the surface of an article, means supporting a member carrying the design to be reproduced on the surface of the article, an optical system scanning the design and including a light sensitive cell controlled by the design, a tool supported opposite the surface of the article for movement toward and away from said surface, means controlled by the light sensitive cell for operating the tool, means for moving the design carrying member relative to the optical system to cause the latter to traverse the design and for also correspondingly moving the article relative to the tool, a templet movable as a unit with the article and having a surface corresponding in contour to the surface aforesaid of the article, and means controlled by the surface of the templet forrelatively adjusting the tool and article in accordance with changes in shape of the latter to maintain the same relationship between the tool and adjacent surface of the article irrespective of variations in contour of the latter.' V

6. In apparatus for producing a design in the surface of an article, a member carrying the record to be reproduced on the surface of the article, a tool supported opposite said surface of the article, means-controlled by the record for relatively moving the article and tool toward and away from each other, means for relatively moving the record carrying member and aforesaid means to cause the record to be traversed by the latter and for effecting corresponding relative movement between the article and tool, a templet having a surface contour corresponding to the contour of the surface aforesaid of the article, an element eng'ageablewith said surface and movable by the latter in accordance with variations in contour of the surface, said templet and element also being correspondingly relatively movable to effect said movement of the element in accordance with variations in contour of the surface of the templet, and means controlled by the element for relatively adjusting the positions of the tool and adjacent surface of the article to maintain the latter in the same relationship irrespective of variations in the contour of said surface.

'7. In apparatus for producing a design in the surface of an article, a member carrying the record to be reproduced on the surface of the article, a tool supported opposite said surface of the article, means controlled by the record for relatively moving the article and tool toward and away from each other, means for relatively moving the record carrying member and aforesaid means to cause the record to be traversed by the latter and for effecting corresponding relative movement between the article and tool, a positioning element engageable with the-surface of the article at a point in close proximity to the point of engagement of the tool with the surface, and means for adjusting the article about the point of engagement of the element with said surface.

8. In apparatus 'for producing a design in the surface of an article, a member carrying the record to be reproduced on the surface of the article, a tool supported opposite said surface of the article, means controlled by the record for relatively moving the article and, tool toward and away from each other, means for relatively moving the record carrying member and aforesaid means to cause the-record to be traversed by the latter and for effecting corresponding relative cle irrespective of variations in contour of said surface. I

9. In apparatus for producing a design in the surface of an article, means supporting a member carrying the design to be reproduced on the surface of the article, an optical system scanning 15 the design and including a light sensitive cell controlled by the design, a tool supported opposite the surface of the article for movement to-- I ward and awayfrom said surface, means controlled by the light sensitive cell for operating the tool, means for moving the design carrying member relative to the optical system to cause the latter to traverse the design and for also correspondingly moving the article relative to the tool, means supporting the article for swinging movement toward and away from the tool, means normally urging the article toward the tool, a

- positioning element engageable with the surface Lof the article at a point adjacent the point of engagement of the tool with said surface, and means responsive to variations in contour of the surface for swinging the article in opposite directions about the point of engagement of the positioning element with the article to maintain the same relationship between the surface of the article and tool irrespective of variations in. contour of said surface.

= 10. In apparatus for producing a design in'the surface of an article, a member carrying the record to be reproduced on the surface of the article, a tool supported opposite said surface of the article, means controlled by the record for relatively moving the article and tool toward and away from each other, means for relatively moving the record carrying member and aforesaid means to cause the record to be traversed by the latter and for effecting corresponding relative movement supporting the templet for swingingmovement' toward and away from said element, means normally urging the templet into engagement with the element, means occupying the same position relative to the templet surface as the tool occupies relative to the article surface and operated by the templet surface in accordance with changes in contour of the latter, .and means controlled by the last namedmeans for moving the article in opposite directions relative to the tool about a point on the surface of the article corresponding to the point of engagement of said element with the templet surface.

11. In'apparatus for producing a design in the surface of an article, a member carrying the record to be reproduced on the surfaceof the article, a, tool supported opposite said surface of the article, means controlled by the record for relatively moving the article and tool toward and away from each other, means for relatively moving the record carrying member and aforesaid means to cause the record to be traversed bythe latter and for effecting corresponding relative movement between the article and tool, a templet having a surface contour corresponding tothe contour of the surface aforesaid of the article, a positioning element engageable withthe surface of the article at a point in close proximity to the point of engagement of the tool with the article surface, a second positioning element engageable with the templet surface-at a point corresponding to the point of engagement of the first element with the article surface, means mounting the templet and .article for swinging movement in opposite directions toward and away from their respective positioning elements, means normally urging the templet and article into engagement withtheir respective positioning elements, means for swinging both the templet and article in opposite directions about the points of engagement of the positioning elements therewith, and means operated by the surface of the templet for controlling the operation of the last named means.

12. In apparatus for producing a design in the surface of an article, a member carrying the record to be reproduced on the surface of the article, a tool supported opposite said surface of the article, means controlled by the record for relatively moving the articleand tool toward and away from each other, means for relatively moving the record carrying member and aforesaid means to cause the record to be traversed by the latter and for effecting corresponding relative movement between the article and tool, means supporting the article for swinging movement toward and away from the tool, a positioning element engageable with the surface of the article adjacent the tool to limit swinging movement of the article toward the tool, 'means for relatively moving the article and positioning element in opposite directions relative to the tool to cause the article to fulcrum about said element and change the position of the surface of the article "relative to the tool, and. means responsive to variations in contour 'of the article to control the operation of the last named means to maintain the same relationship between the surface of the articleand tool irrespective of changes in contour of said surface.

13. In apparatus for producing a design in the surface of an article, means supporting -a member carrying the design to be reproduced on the surface of the article, an optical system scanning the design and including a light sensitivecell controlled by the design, a tool supported opposite the surface of the article, means controlled by the light sensitive cell for relatively moving the tool and article toward and away from each other, means'for relatively moving the optical system and design carrying member to cause the design to be traversed'by the optical system and for also correspondingly relatively moving the article and tool, a carriage supporting the article for swinging movement in directions toward and away from the tool, a

positioning element engageable with the surface of the article adjacent the tool to limit swinging movement of the article toward the tool, means for moving the carriage toward and away from the positioning element to cause the. article to fulcrum about the point of engagement of the positioning element with the surface thereof, and

means responsive to variations in contour of the article to control the operation of the last named means to maintain the same relationship be-- alight sensitive cell controlled by the record,

14. In apparatus for producing a design in the surfaces of a plurality of articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced-on the surfaces of the articles, a tool supported opposite each article for movement toward and away from the surface of the latter, means controlled by the record for moving the tools as a unit toward and away from the articles, means for relatively moving the record carrying member and second named means to cause the record to be traversed by thelatter means and for also effecting relative movement of the articles and tools, means for relatively moving the articles and tools toward and away from each other to maintain the same relationship between the tools and adjacent surfaces of the articles irrespective of changes in contour of said surfaces, and means operated in dependence upon-changes in the contour of said surfaces for controlling the operation of the last mentioned means.

15. In apparatus for producing a design in the surfaces of a plurality of articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced on the surfaces of the articles, a tool supported opposite each article for movement toward. and away from the surface of the latter, means controlled by the record for moving the tools as a unit toward and away from the articles, means for relatively moving the record carrying member and second named means to cause the record to be traversed by the latter means and for also eifecting relative movement of the articles and tools, means supporting the articles for swinging movement independently of each other toward and away from the tools, a positioning element engageable with the surface of each article adjacent the points of engagement of the tools with the surfaces, means for moving the articles as a unit in opposite directions relative to the tools to cause the articles to fulcrum about their respective positioning elements and change the positions of the article surfaces relative to the tools, and means responsive to variations in contour of the article surfaces to control the operation of the last named means.

16. In apparatus for producing a design in th surfaces of a plurality of articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced on the surfaces of the articles, a tool supported opposite .each article for movement toward and away from the surface of the latter, an optical unit for scanning the record including means controlled by the light sensitive cell for moving the tools as a unit into and out of enmaintain the same relationship between the sur- 7 faces of the articles and tools irrespective of variations in surface contour of the articles.

17, In apparatus for producing a design in the surfaces of a plurality of articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced on the surfaces of the articles, a tool supported. opposite each article for movement toward and away from the surface of the latter, an optical unit for scanning the record including a light sensitive cell controlled by the record, means controlled by the light sensitive cell for moving the tools as a unit into and out of engagement with the surfaces of the articles, means for relatively moving the record carrying member and optical unit indirections to cause the record to be traversed by the optical unit and for also effecting corresponding relative movement of the articles" and tools, a carriage supporting the articles for swinging movement .in dependently of one another toward and away from the tools, a positioning element engageable with the surface of each article at a point adjacent the point of engagement of the tools with said articles, means for moving the carriage toward and away from the positioning elements to cause the articles to fulcrum about the points of engagement of the positioning elements with the articles, and means responsive to variations in the surface contour of the articles for controlling the last named means.

18. In apparatus for producing a design in the surfaces of a plurality of articles, means for supporting the articles in spaced relation to each record to be traversed by the latter means and for also effecting relative movement of the ar-.

ticles and tools, a templet having a surface contour corresponding to the contour of said articles, an element engageable with the templet surface and supported for movement in directions toward and away from the templet, said templet and element being relatively movable in accordance with the traversing relative movement aforesaid of thearticles and tools whereby said element moves in opposite directions in response to changes in contour of the templet surface, and

means controlled by the element for relatively moving the articles and tools as a unit in accordance with changes in contour of the articles to maintain the same relationship between the articles and tools irrespective of changes in the 'surfa'c'contour of the articles.

19. In apparatus for producing a design in the surfaces of a plurality of" articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced on the surfaces of the articles, a tool supported opposite each article for movement toward and away from the surface of the latter, an optical unit for scanning the record including a light sensitive cell controlled by the record,

means controlled by the light sensitive cell for moving the tools as a unit into and out of engagement with the surfaces of the articles, a carriage supporting the articles for swinging movement independently of one another toward and away from'the tools, a positioningelement engageable with the surface of each article at a point adjacent the point of engagement of the tools with said articles, means for moving the carriage in directions toward and away from the positioning elements, a second carriage supporting the first carriage and movable in opposite directions transverse to the path of movement of by the record for relatively moving the tools and said first carriage, and means controlling the movement of one of the carriagesin accordance with variations in the surface contour of said articles. to maintain the same relationship between said articles and tools irrespective of changes in the contours of said articles.

20. In apparatus for producing a design in the surface of an article, means supporting a mem--- ber carrying the design to be reproduced on the surface of the article, an optical system scanning the design and including a light sensitive cell controlled by the design, a tool supported opposite the surface of the article, means controlled by the light sensitive cell for relatively moving the tool and article toward and away from each other, means for relatively moving the optical system and record carrying member to cause the record to be traversed by the optical system and for. also correspondingly relatively moving the article and tool, a carriage supporting the article for swinging movement in directions toward and away from the tool, a positioning element engageable with the surface of the article adjacent the tool to limit swinging movement of the article toward the tool, means formoving the carriage toward and away from the tool, a second carriage supporting the carriage aforesaid and movable in opposite directions transverse to the path of travel of the first carriage, and means responsive to changes in the surface contour of the article to control the operation of one of said carriages to maintain the tool and adjacent sur face of the article in the same relative positions irrespective of variations in the contour of said surface.

21. In apparatus for producing a design in the surfaces of a plurality of articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced on the surfaces of the articles, a tool supported opposite each article for movement toward and away from thesurface of the latter, an optical unit for scanning the record including a light sensitive cell controlled by the record, means controlled by the light sensitive cell for moving the tools as a unit into and out of engagement with the surfaces of the articles, means for relatively moving the record carrying member and optical unit in directions to cause the record to be traversed by the optical unit and for also effecting corresponding relative movement of the articles and tools, a carriage supporting the articles for swinging movement independently of one another toward and away from the tools, a positioning element engageable with the surface of elements therewith, and means operated by the surface of the templet in accordance with variations in the contour thereof to control the operation of the last-named means.

22. -In apparatus for producing a design in the surfaces of a plurality of articles, means for supporting the articles in spaced relation to each other, a member carrying the record to be reproduced on the surfaces of the articles, a tool supported opposite each article, means controlled articles toward and away from each other,fand

of the surfaces aforesaid of the articles for relatively adjusting the tools and articles to maintain the same relationship between the tools and adjacent surface of the articles, irrespective of variations in the contour of said surfaces.

, 23. In apparatus for producing a design in the surface of an article, means supporting an article having a surface on which a record is to be reproduced, a tool supported opposite said; surface of the article, means controlled by the record for relatively moving the ar ticle supporting means and tool toward and away from each other, electrically operated means for relatively adjusting the article and tool to maintain the same relationship between the tool and adjacent surface of the article irrespective of variations in the contour of said surface, and a switchcontrolling the operation of the last named means and operated in dependence upon variations in relatively moving the article and tool toward and away from each other, means forrelatively moving the record carrying member and aforesaid means to cause the record to be traversed by the latter and for effecting corresponding relative movement between the article and tool, a positioning element engageable with the surface of the article at a point in close proximity to the point of engagement of the toolwith the surface, and means responsive-to variations in contour of the surface of the article for relatively moving the article and positioning element to effect an adjustment of the article relative to the tool about the point of engagement of the element with the surface of the article and thereby maintain the same relationship between the tool and adjacent surface of the. article irrespective of variations in contour of the latter.

25. In apparatus for producing a design in the surface of an article, a member carrying the record to be reproduced on the surface of. the article, a tool supported opposite said surface of the article, means controlled by the record for relatively moving the article and tool toward and away from each other, means for relatively moving the record. carrying member and aforesaid means to cause the record to be traversed by the latter and' for effecting corresponding relative movement between the article and tool, a positioning element engageable with the surface of the article at a point in close proximity to the point of engagement of the tool with the surface, electrically operated means for relatively moving the article and positioning element in opposite directions to effect adjustment of the article about the point of engagement of the element with the surface of the article, and a reversing switch responsive to variations in the contour of saidsurface of the article for controlling the operation of the last named means.

26. In apparatus for producing a design in the surface of an article, means supporting a member carrying the design to be reproduced on the surface of the article, an optical system scanning the design and including a light sensitive cell controlled by the design, a tool'supported opposite the surface of the article, means conoptical system and design carrying member to cause the design to' be traversed'by the optical system and for also correspondingly relatively moving the article and tool, a carriage supporting the article for rocking movement, a posiand for also correspondingly relatively moving tioning element engageable with the surface of the article adjacent the tool to limit rocking' movement of the article in a direction toward the tool, electrically operated means for moving the carriage toward and away from the positioning element to cause the article to fulcrun'r about the point of engagement of the positioning'element with the surface thereof, and a neversing, switch controlling the operation of the last named means and operated .in dependence upon changes in contour of the surface'of the article to maintain the same-relationship between I mean;

the design a d including a light sensitive cell controlledby the design, a tool supported opposite the surface of the article, means controlled [by the light sensitive cell for relatively moving the tool and article toward and away from each other, means for relatively moving'the optical system and design carrying memberto cause the design to be traversed by the optical system the article and tool, a carriage supporting the article for swinging movement in directions toward and awayfrom the tool, a positioning element engageable with the surface of the article adjacent the tool to limit swinging movement of the article toward the tool, means for moving the carriage toward and away from the posithe article, and means operated by the surface of the templet for controlling the operation of said carriage moving means.

EVERE'I'I J. COOK.

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