US460931A - goudie - Google Patents

Description

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w. GOUDI E. PANTOGRAPHIG ENGRAVING MACHINE.

No. 460,931. Patented Oct. 6, 1891.

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W. GOUDIE. PANTOGRAPHIG' ENGRAVING MACHINE.

No. 460,931. Patented Oct. 6, 1891.

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UNITED STATES PATENT OFFICE.

WILLIAM GOUDIE, OF GLASGOlV, SCOTLAND.

PANTOGRAPHIC ENGRAVlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 460,931, dated October 6, 1891.

Application filed June 10, 1891. Serial No. 395,744- (No model.) Patented in England April 30,1889. No. 7,157, and in Belgium January 26, 1891, No. 93,541.

To to whom it may concern.-

Be it known that I, \VILLIAM GoUDIE, a subject of the Queen of Great Britain and Ireland, and a resident of Glasgow, in the county of Lanark, North Britain, have invented certain Improvements in lantographic Engraving-Machines, (for which I have obtained a British patent, No. 7,157, dated April 30, 1889, and a Belgian patent, No. 93,541, dated January 26,1891) of which the following is a specification.

My said invention has for its object, by means of improved appliances, to adapt pantographic engraving-machines for engraving upon glass globes and other similar articles of glass or other material having surfaces varying more or less from simple globular or cylindrical forms.

My improvements can be applied to various kinds of pantographic engraving-machines, but I prefer such as are of simple construction and which have appliances or can be easily fitted with appliances for varying the proportion between the guide-pattern and what is to be produced by the engravingpoints.

In one machine to which myimprovements are very conveniently applicable the tracer is attached to a pair of jointed pantograph parallelograms, the fixed and acting centers of which are adjustable for varying the proportion between the guide-pattern and the work, the acting centers being attached to a long beam which rests on steel balls. For some purposes a single pantograph parallelogram is sufiicient. The beam, in moving in correspondence with the pattern, imparts combined longitudinal and rotary movements to a horizontal shaft on which alarge number of glass globes or other articles are strung for the purpose of being engraved si multaneously, special appliances being provided for holding them securely and in a manner to obtain accurate work. The engraving-points, of which there are diametrically-opposite sets, are carried by weighted levers on stationary centers, as in some existing machines, but the bars carrying the centers are adjustable, so that the levers holding the engraving-points may be disposed in the best manner to suit the particular form of globe or article 011 which they have to operate. There may be three or more sets of engraving-points, arranged to act on three or more equidistant parts of the globes or articles.

In order that my said invention and the manner of performing the same may be properly understood I hereunto append three sheets of explanatory drawings, to be hereinafter referred to, and representing pantographic engraving machinery as provided with my improved appliances.

Figure 1, Sheet 1, of the drawings is a plan showing parts of a machine as adapted for engraving glass globes. Fig. 2,Sheet- 2, is a sectional front elevation; and big. 3, Sheet 3, is an end elevation. In these drawings the same reference-letters are used to mark the same or like parts wherever theyare repeated.

In the construction shown in the drawings a well-known single pantograph parallelogram A is employed to reduce and transfer the movements of the tracer A, carried by hand over the lines of the guide-pattern A to a beam B, which rests on steel balls B. Above the beam B there is a horizontal shaft C, the ends of which pass through blocks 0', which are placed in vertical guide-slots D in end frames D, the shaft 0 being fitted to move freely endwise through the blocks 0. Near its ends the shaft 0 has fixed on it cylindrical .nlle s G whichrest on transverse horizontal rails B formed on brackets B fixed on the beam B, and as the beam 13 is moved by the pantograph A in any direction any endwise motion is imparted as such to the shaft by ribs or flanges on the rails Bdacting on the edges of the pulley C while any backward or forward motion causes a corresponding rotation of the shaft 0 through the ac tion of the rails Won the cylindrical surfaces of the pulleys G One of these pulleys G (or each of them) has lines markedonits periphery, dividing it into aliquot parts, and an adjustable pointer 0 fixed to the end frame D, is provided to facilitate the setting of the pulley and the shaft 0 and articles thereon,so that repeats of a pattern may be commenced at points accurately dividing the circumference of a globe or other article into equal segments. The globes or articles E to be engraved are strnn g upon the shaft 0 and are centered and fixed thereon by means of metal disks F, which are made with bosses accurately fitted on the shaft, on which they are fixed by pinchingscrews, when adjusted with the globes E between them. Each disk F has on one side of it a cover 1*" of rubber or other suitable soft material, for the larger end of a globe E to bear against, and on the other side there is a slightly-projecting boss to enter the smaller opening of the next globe, a rubber ring F of suitable shape being placed round the boss and rubber rings of different sizes being provided to suit different globes.

The engraving-points G, of which there are two diametrically-opposite sets in the modification shown in the drawings, acting, respectively, on the highest and lowest parts of the globes E, are carried by weighted levers G G2 on stationary centers G adjustable on longitudinal frame-bars G The engraving-points G are not in contact with the globes E, excepting when the operatordepresses a treadle H, which is fixed to a rocking shaft H, having fixed on its ends levers H connected by rods H to a longitudinal bar H provided with adjustable screw-pins to act on the upper engraving-levers G. A similar bar acts reversely on the lower engraving-levers G the two bars H H moving in vertical guides H and the lower one H being acted on by cams H turned by levers H moved by pins on the rods H The weights of the parts are so arranged that when the operator takes his foot off the treadle H the longitudinal bars H H move so as to turn the levers G G with.

her or like material to grip the articles to be engraved, a series of said articles held on the shaft by and alternately between said disks, and one or more sets of engraving-points carried by weighted levers on adj ustablestationary centers, the parts being arranged and operating substantially as and for thepurposes herein set forth.

2. The means for holding a series of globes or other articles in a pantograph engravingmachine, said means consistingof a shaft and a series of metal disks adj ust-ably fixed on the shaft with interposed rubber or like material, so as to grip the articles between the disks, substantially as set forth.

- Intestimony whereofl have-signed my name to this specification in the presence of two subscribing witnesses.

WVILLIAM GOUDIE. Witnesses EDMUND HUNT, DAVID FERGUSON.

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