US1187034A - Cutting and marking machine. - Google Patents

Description

L. W. BUGBEE.

CUTTING AND MARKING MACHINE.

APPLICATION FILED DEC. 28. l9l4.

Patented June 13, 1916.

3 SHEETS-SHEET l.

WITNESSES. v IN l/E/V TOR W) W LU IAN w Elly-BEE:

H H1 Q1 ATTORNEKS L.'W. BUGBEE. CUTTING AND MARKING MACHINE.

AFPLICATION FILED DEC. 28. I914.

Patehted June 13, 1916. Y

3 SHEETS-SHEET 2- FIG.VJIL

FIGJI WITNE88E8i INVENTOR v LUCIA/V w 509554 A TTORNEYS v I? r r I J THE coumnm PM!!! 50., WASHINGTON. D. C.

L. W. BUGBEE.

CUTTING AND MARKING MACHINE. APPLICATION FILED DEC.28. i914.

1,187,034. S S PatentedJune13,1916.

- 3 SHEETS SHEET 3- INVENTOR LUCIAN w. Buq g WITNESSES:

A TTORIVEKS LUCIAN W. BUG-BEE, OF SOUTI-IBRIDGE, MASSACHUSETTS, ASSIGNOR T0 AMERICAN OPTICAL COMPANY, .OF SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARY ASSO- CIATION.

CUTTING AND MARKING MACHINE.

Specification of Letters Patent. Patented June 13, 1916 Application filed December 28, 1914. Serial No. 879,287.

To all whom it may concern: Be it known that I, LUCIAN W. BUGBEE,

"a citizen of the United States, residing at Southbridge, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Cutting and Markinglllachines, of which the following is a specification.

This invention relates to improvements in cutters, and has particular reference to an improved machine particularly adapted for use in'cutting glass into ellipses and other irregular shapes. 7 I v q l v The leading object of this invention isthe provision of an improved machine of this character, especially adapted for use in cutting ophthalmic lenses to desired size and form. i

Another object of the invention is the provision of simple and etficient mechanism for insuring correct relation of the diamond or other cutting point and the material to be operated on according to the particular configuration of the said material.

A further object of the invention is the provision of improved means of simple and eliicient character whereby the size and' shape of article to be formed from a certain shape of pattern as a guide may be readily varied as desired.

Another object of the invention is the provision. of improved means for retaining the lens in position and of improved means for so securing the pattern or former in position as to permit ofready access thereto and removal and replacement thereof as desired.

A further object of theinvention is the provision of an improved form of pad for receiving the article to be cut, which pad shall be so constructed as to satisfactorily fit and securely engage the various ordinary forms of blank or the like when placed withinthe machine.

Other objects and advantages of this improvement include a simplification of parts and arrangement thereof to facilitate most ready manipulation, and it will be understood that any improvement falling within the scope of the appended claims may be made without in any wise departing from or exceeding the spirit of this invention.

Figure I represents a fragmentary side elevation of one embodiment of the machine. Fig. II represents a similar view illustratresents a front elevation of the machine. Fig. IV represents a view taken from the opposlte side to Figs. I and II. Fig. V represents an enlarged fragmentary sectional view, particularly bringing out one manner of retaining the former. Fig. VI represents a similar view of another construction.

Fig. VII represents a sectional view illustrating the engagement of the improved pad with article to be operated on. Fig. VIII represents a plan View of the pad with a marked lens in position thereon. Fig. IX

represents a sectional view on the line IX IX of Fig. IV. Fig. X represents a sectional view on the line XX of Fig. III.

In the drawings, in which similar characters of reference are employedto denote corresponding parts throughout the several views,'the numeral 1 designates-the base of the machine, having preferably rising therefrom the standard 2 provided .with the bracket arms 3 and 4, having bearings for the vertical spindle 5', which is provided on its upper endwith the gear 6 meshing with the pinion 7 on theupper end of the shaft 8. Said shaft is provided on its lower end with a second pinion 9 meshing with the teeth 10 V in the cutting of ellipses, the cuts at the ends of the major axes of the ellipses will rest substantially over the ring 14, while the cuts at the sides or on the minor axes will lie within the'said ring. The purpose of providing a ring rather thana flat pad or pad shaped to substantially the configuration to be cut out, ashas been previously employed, shouldbe readily apparent by reference'to Fig. VII, from which it will be noted that theconvex surface will securely fit against the ring, as indicated in the full lines, and the concave surface will equally satisfactorily engage the same, as is indicated by ing adifferent form thereof. 'Fig, IIIrep-. the dotted lines The principle here employed is that circle or edge of a cylinder will fit at all points against any spherical surface of greater radius than the radius of the circle, irrespective of whether the curvature be convex or concave, and irrespective of the amount of said curvature. Consequently the present improved form of pad is the only form which will securely engage all points of an ophthalmic lens or the like to securely hold the same in position and prevent rocking movement or strain thereof. It is to be, noted that the said pad 13' rocking movement and will be so held that there will not be undue strain at. the point of operation of the tool.

This will further be clearlyu'nderstood by "reference toFig. VIII, in which it will be noted that the dotted line indicating the path of the tool lies at the ends of the ellipse, substantially over the flange 14 so that the article 16 being operated on is directly supported at these points, while the path 'at the sides of the ellipse is but slightly withinthe i flange, andas the article 16 rests firmly on ;,were the article supported only at the center the flange this distance is so slight as to obviatejany undue strain, as would take place or only by resting on the extreme edges thereof. 1

'JIt will be understood that in order to properly mark out the path 15, a suitable guide, pattern or former, must be made use of, which will have its'movement synchronous with that of the article to be marked, as the said article is rotated. To accomplish this, a former 17 is mounted on the spindle 5., In view'of the large number ofdifferent shapes which itis desired-to form with this machine, the said former 17 is preferably suitably held for removal and replacement as desired, pins orrkeys 18 serving to hold the former against rotation relative to the spindle 5 andto lock it for movement therewith.

A number of different methods of removably securing the former in position on the lower end of the spindle 5 may be employed, one of these being illustrated in Fig. V. In

this form there is carried by the standard 2 the pair ofears 19 connected by the rod 20, on which is pivotally mounted the arm 21 I held inraised position by means of the compression spring 22.

Said arm 21 has 'ro- 'tatablysecured to the 'free end thereof the pad 23 adaptedto fit against the lower end h'of the spindle 5, the pad23 having a por-' tion.24r fitting into the central aperture in the former or pattern 17, and being further provided with the lugs 25 interlocking with the pin receiving apertures of the former whereby the pad is held locked to rotate with the former and spindle 5.

It will be noted that the pressure of the spring 22 forcing the arm 21 upward, serves to hold the pad 23 in tight engagement with the former and to press the former securely in position against the lower end of the spindle 5 and thus to normally look the former in position. To remove the former, however, it is merely necessary to press downward on the arm 21 and then swing the same outward, when the former may be readily pulled downward off the end of the spindle 5 and replaced with another of different shape as desired.

Depending from the pad 23 is the member 26 having telescoping therewith the sleeve 27 hearing at its lower end the tripod or work engaging and clamping member 28, a spring 29. engaging the sleeve to force the tripod downward into clamping position, while handles 30 serve to raise the tripod as desired against the pressure of the spring 29, as when it is desired to insert or remove the work or when it is desired to swing the arm 21 and parts carried thereby outward. It will be noted that the pressure of the spring 29 supplements that of the spring 22 in holding the pad 23 in tight engagement with,the lower end of the spindle 5 while the interlocking of the spindle, former and pad 23 causes the rotation of the tripod or clamp 28 synchronously with that of the former and that of the table, so that the work 16 is parts just mentioned, and any slipping or displacement thereof is prevented.

In Figs. II, III and VI, is illustrated another variation of the principle just described, in that the arm 21 in place of being mounted on a spindle and held by a spring, is mounted between the pivot bearings 31 and has rotatably secured at its inner end the sleeve 32 containing the spring 33, serving to press upward the pad member 34c and to press downward the tripod 28. Handles 35 and 36 projecting through a slot in the side of the tube to facilitate adjustment of either the pad or the tripod, as desired, while grasping and pressing together of the two handles 35 and 36 serve to simultaneously retract both the pad member 34: and the tripod to facilitate outward or inward swinging of the arm 21 and the parts carried thereby. In this form the lower end of the spindle 5' is slightly varied, in that it extends downward through the former 17 and is provided with a spring 37 for aiding in retainingthe former thereon, the lower end of the spindle 5 fitting into a suitable socket in the pad member 3d, the pin or keys 18 being received in securely clamped to rotate with the various 3 suitable sockets in the pad to cause the pad to rotate with the spindle.

In either construction the result attained is the same, that is to say, means are provided for resiliently clamping the work in place, and for rotating in conjunction with the work and table therefor, which means may be either released from the work in a vertical direction, or may be laterally moved entirely out of the road. In addition means are provided which serve to ordinarily secure the pattern in position and to positively drive the work clamp or tripod synchronou sly with the table for supporting the work, which clamp driving means and pattern retainer are capable of lateral movement to facilitate ready removal and replacement of the pattern when desired. 7

To satisfactorily operate upon the article, such as a lens to be cut, it is necessary to have a tool or cutting member which shall be held in engagement with the pattern and be mounted for yielding movement to at all times exactly follow the pattern as to shape.

In the present machine there is disposed at one side of the standard 2, preferably as a matter of convenience at the opposite side from that at which the arm 21 is pivoted, a shaft or spindle 38 which is rotatably mounted and carries at the upper end, thereof an arm 89 terminating in a yoke 40, bearing a pattern engaging member or shoe. A spring 41 wound on the member 38 and having one end bearing against the arm 39 and the opposite against the base or standard, serves to resiliently force thearm inward to hold the shoenfember against the pattern, while an automatic latch or detent 42 is so disposed as to lock the arm 39 in outwardly swung position against the tension of the spring 41 when desired.

It will be understood that different forms of shoes or pattern engaging members may be employed, a particularlydesirable form, however, being here shown and particularly illustrated in Fig. X. This form comprises a U-shaped frame 43 having at its upper end the pivot bearing 44 fitting into one of the arms of the yoke 40 and having at its lower end the spindle 45, rotatably engaging and depending below the other arm of the yoke. Slidably mounted in the frame 43 is the block 46,- adjustable therein by means of the screw 47 and having rotatably mounted thereon the member 48 which may be either in the form of a disk or plate having a plurality of pins 49 rising in pairs therefrom, or may be in the formof a star wheel The purpose of the pins'49 is to engage the edge of the former or pattern 17, the spring 41 holding the pins in tight engagement therewith. I V

In the cutting of lenses or the like, it is frequently desirable to out different shapes without changing theformer 17. This result to the path described by the operating tool or cutter. The disadvantage in this prior has hitherto been attained by means of a pair of jaws engaging the edge of'the former, which jaws are relatively adjustable, that is, capable of in and out movement relative to each other. This movement allows the former to extend more or less in between the jaws, the result being that when the jaws, are close together, as are the innermost pair of pins indicated in Fig. X, the device fol lows substantially exactly the outline of the former, while if the jaws are far apart as are, the" outermost set. of pins, the ends of theelliptical former will move in between the jaws, thus giving a rounder outline construction is that it-is necessary to adjust the in and out position of the jaws to compensate for their relative movement and the consequent decrease in length of axls of the ellipse on account of the ellipse movmg. inward between the jaws. In the pressent construction, however, the different pairs of pins are so arranged as to compensate for this inward movement to keep the long axis as well as the short axis of the ellipse or figure constant irrespective of the movement to vary the shape. This is accomplished, it will be noted, by arranging the different pairs of pins at different distances from the center, the pair A for. example, being located very near the center, as when this pair isplaced in engagement with the edge of the former the exact shape of the former will be reproduced by the tool. The set .D on the other hand, is

placed a considerable distance from the center :50, on which the member 48 turns, on account of the fact that the end of the former will move inward between these pins due to the distance apart at which the same are set; the position assumed by the former relative to the pair D and to the pair A has been indicated in dotted lines to better bring out the particular result here obtained. It will thus be seen that irrespective of the rotation of the member 48 and the pair of pins brought into engagement with the edge of the former, that there will be no variation in the major or minor axes of. the ellipse or other figure described by the tool, but only avariation in shape, the variation in size, therefore, being controlled solely by the? adjustment secured through the screw 47.

Carried by the lower end of the spindle 45 and movable therewith under the guidance of the pattern 17 as the latter is rotated, is the tool or cutter 57 for operating on the lens or other device 16 carried by the table 11.

Briefly stated, the operation of the machine is as follows: The parts being in the position indicated in Fig. III, if it is desired to cut a different shape of lens or the like the arm 39 is swung outward and locked tioni inreleased position by the latch 42, the desired pattern 17 being placed on the lower end of the spindle 5. The arm 21 is then swung inward and the pad 34 released to lock the pattern in position. If desired, the

tripod 28 may then be raised against the pressure of its retaining spring and the blank or article 16 to be operated on placed inposition on the flange14qwhen the tripod is released to clamp the article 16 in posi- The plate orgmember 48 is their adjusted according to the variation in shape s desired and the latch l2 released, allowing the spring 41 to swing the arm 39 inward and bring the proper pins or contacting members 19 into engagement with the former 17, The exact position of the member 18 maybe adjusted eitherbefore or after the pins are brought into engagement with the former through the medium of the screw 47. Likewise the proper tool may be swung into position or the position of the tool or cutter properly adjusted either before or after the arm 49 has beenrmoved into-operating position. The parts now all be ng 1n operat ve position it is merely nec essary to rotate the complete device by turning the handle 12, which as before mentioned, through the pinion. 7, shaft 8 and gagement between the point 57 and the up pinion ,9, serves to rotate the table synchronously with the. former 17, when the former Will impart a lateral movement in and out to the arm 39 and tool point, the rotation and movement of the tool together combining to produce a path such as 15 on the article 16. To release the article it is then merely necessary to raise the'tripod.

It is to be understood that the secure ening understood, however, that the descrip tion and drawings are intended only to bring out the essential features andprinciple of the machine, and that the various details of construction may be varied according to the peculiar requirements of individual instances;

lclaimzj, I 1. A machine'of the character described, embodying a work supporting tablehaving was circular i'work receiving flange rising therefrom, a standard disposed adjacent the table, a gear supported by the standard, connections between the gear andthe table for synchronously rotating the same, a spindle secured to the gear, a former removably mounted on the spindle and means pivoted to the standard and adapted to be interposed between the former and the work forarm is swung outward away from the former for locking the arm in inoperative position.

3. The combination with a rotating tool spindle having a former receiving seat, of a former fitting on the spindle and against the seat, said former having sockets formed therein, and resilientlyactuated clamps carried by the spindle and fitting within and engaging the sockets in the former for retaining the former in position on the spindle, substantially as described.

4. In a machine of the character described, the combination with a tool spindle, of a frame carried thereby, a plurality of pairs of contacts mounted in the frame, different pairs of contacts being diiferently spaced, means whereby any pair of contacts may be brought into operative position, the said different pairs of contacts being eccentrically disposed, whereby the eccentric disposition of the different pairs compensate for the variation occasioned by the different spacing of the pairs, substantially as described.

5. In a machine of scribed, the combination "with a rotating elliptical or prolate former, of a tool arm having a portion for engaging the former, said portion including a pivoted member having a plurality of pairs of unequally spaced contact points, the different pairs being disposed at different distances from the point of pivotance, whereby when any pair is brought into engagement with the former the major and minor axes of the path of the tool will be constant regardless of the projection of the former interiorly of the pin, substantially as illustrated.

G. In a device of the character described, the combination with a rotatable former, of a tool arm having means for cooperating with the former, said means including a frame, a'slide carried by the frame, means for securing the slide in desired adjusted position, a plate rotatably mounted on the slide, and provided with a plurality of pairs of contacts, said pairs of contacts being so disposed on the plate that different pairs when in engagement with the former the character de-- as it is rotated cause the tool to follow different paths of movement, all of which have the same major and minor axes for a given adjustment of the slide, substantially as described.

7. In a machine of the character described, the combination with a base, of a table rotatably mounted thereon, a standard rising from the base, a former spindle, manually operable means supported by the standard for synchronously rotating the former spindle and the table, a former re movably mounted on the spindle, a pressure device removably mounted intermediate the former and the table for retaining both the former and the work to be operated on in position, and means for insuring synchronous rotation of the said device with the former and table.

8. In a machine of the character described, the combination with a base and a standard rising therefrom, of a work support carried by the base, a former carried by the support, means for synchronously rotating said parts, an arm pivoted to the support and adapted to be moved to-project between the former and work table, a work clamp and a former clamp carried by the arm, and resilient means for independently holding each of said clamps in desired adjusted position independent of the other.

9. In a machine of the character described, the combination with a base, and a standard or support rising therefrom, of a work support rotatably mounted on the base, a rotatable former carried by the standard and spaced from the table, an arm pivoted to the standard and adapted to be formed intermediate the table and former, a former clamp and a work clamp carried by the arm, means for resiliently shifting the combination with a rotatable spindle,

said spindle having centering devices proecting laterally therefrom, of a former mounted on the spindle and having recesses engaging the centering devices, an independv ent resiliently mounted clamp for retaining the former in position, and interlocking parts on the clamp and one of the adjusting members for insuring synchronous rotation of the clamp and former.

'11. In a machine of the character described, the combination with a base and. a standard rising therefrom, of a table rotatably mounted on the base, a former mounted for synchronous rotation with the table, an arm pivoted to the standard and extending between said parts, a former clamp rotatably supported by the arm and resiliently securing the former in position, means for synchronously rotating the former and clamp, a work clamp rotatable with the former clamp, and means resiliently interposed between the clamps for pressing the latter into operative position, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

LUCIAN W. BUGBEE.

Witnesses: 1

EDITH M. 'I-IALVoRsEN, JOSEPH J. DEMERS.

0op1 es of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. 0.

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