US445321A - moulton - Google Patents

Description

3 SheetsSheet 1.

(No Model.)

G. MOULTON.

PANTOGRAPH ENGRAVING MACHINE.-

No. 445,321. Patented Jan.2'7,1891

Wmm

lNVENTOR (No Model.) 3 Sheets-Sheet 2.

G. MOULTON.

PANTOGRAPH ENGRAVING MACHINE. No. 445,321. Patented Jan. 2'7, 1891.

1NVENTOR 3 SheetsSheet 3.

(No Model.)

G. MOULTON.

PANTOGRAPH ENGRAVING MACHINE.

N0.445.321.- Patented Jan. 2'7, 1891.

INVENTOR men STATES PATENT OFFICE.

GEORGE MOULTON; OF MANCHESTER, ENGLAND.

PANTOGRAPH ENGRAVlNG-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 445,321, dated January 2'7, 1891.

Application filed November 26, 1889. Serial No. 331,6 (N0 model.) P tented in England J annary 14, 3 1

To all whom it may concern:

Be it known that I, GEORGE MOULTON, a subject of the Queen of Great Britain and Ireland, residing at 76 \Vhitley Street, Rochdale Road, Manchester, in the county of Lancaster, England, have invented certain new and useful Improvementsin Pantograph Engraving-Machines, (patented in Great Britain January 14., 1888, N0. 597,) of which the following is a specification.

My invention relates to the so termed pantograph engraving-niacinnes which are used in the tracing or engraving of designs upon articles preparatory to the subsequent etching operations, as is well understood.

The principal object of my invention is to render the machine better adapted to operate upon comparatively small obj ects-as, for on ample, my improved machine is well adapted for operating upon glass articles; but I do not limit myself to the indicated uses for the machine. I carry the article to be engraved upon a table or carrier, which is fitted to revolve upon a vertical axis, and I move the tracer vertically, the two motions being derived from the pantograph apparatus. Two or more tables may be arranged at different levels, and one, two, or more tables may be mounted at one level. The tables in a set at one level are connected together, and are also connected with the pantograph apparatus. One tracer only may act upon each article, or two or more. A number of tracers may be arranged around the axis of revolution of one table, and such number may correspond to the repeats of the pattern or to a divisor of such repeats.

The nature of my invention will be best understood when the said invention is more fully described with reference to the three sheets of drawings which are attached hereto.

Figure 1 represents a side elevation of my improved engraving apparatus applied to a pantograph-machine, which is not entirely shown for want of space. Fig. 2 is a sectional plan of the engraving apparatus and exhibits the pantograph-machine more fully. Fig. 3, drawn to a larger scale, is a sectional elevation of one of the tables a, which carry the work, and exhibits, also, one of the tracers with its connected parts.

It must be understood that the pantographmachine may be of any suitable construction,

and it has not,therefore,been considered necessary to show it in its entirety in the drawings.

In the said drawings, a a are tables which carry the work to be engraved and are mounted to vibrate upon vertical axes. In the example eight of these tables are arranged in sets of four attwo levels, one set being carried above the other set. The left-hand table in the lower set is left 'out in Fig. 1, in order to show the templet more clearly. This templet will be referred to hereinafter. Each table is attached to the upper end of a hollow shaft a, which is provided with two steel centers 0. One of these centers rests in a seating in the upper end of a post I), which is inside the said hollow shaft, and the other center is adjusted to work in a second seating formed in the lower end of the post, this latter center being carried by an arm a which is attached to a wheel (1 upon the lower end of the hollow shaft. It will be seen that the table will be at liberty to move with very little friction partly around the vertical axis passing through the points of the two centers. The four posts 1) which carry the four tables in the lower set are secured by their lower ends to the bed or framing of the machine. The four upper posts are secured to a frame which is attached to a central fixed column 0. The tables are provided with sliding jaws or dogs or are otherwise suitably adapted to hold the work. In the case of one of the tables in Fig. l a glass globe is represented as fixed in position to be engraved.

The tracers are carried by annular parts (I,

which I will term tracer-carriers. The four tracer-carriers in each set are attached to a cross-head e, and the two cross-heads are connected together by means of rods ff. Each tracer is carried by a bcll-crank lever g, which is hinged to a bracket g, which is secured upon the tracer-carrier and is adjustable thereon in position around the vertical axis of motion of the table a and also toward and from the said axis. In the case of one of the tables two tracers are shown; but it must be understood that all the eight tracer-carriers are similarly provided, one, two, three, or more tracersbeingappliedaroundeachtable,asmay be required. hat I will term the vertical arm of the lever g carries the tracer, the

ICO

end of the horizontal arm projecting above a plate h. The tracer is kept in contact with the work by the action of a spring which bears against the said vertical arm. A weigh t. might be used in placeof this spring. Itwill be seen that if the plate It were raised the tracers would be withdrawn from the work, and on the contrary if the plate were lowered the tracers would be permitted to return toward the work. The said plate is provided with a hollow boss, which is fitted to slide within the eye of the tracer-carrier, as seen in Fig. 3.

All the eight plates in the two sets are connected together by means of levers and rods, so that when one moves vertically all the eight plates move in unison. This connection is effectedby means of levers t' i,which are hinged at jj and are connected by their shorter arms with the bosses of the plates h. The ends/of the longer arms are coupled together and to vertical rods which connect together the levers iand i, which are in connection with the two sets of tables. The lever 11, which is to the left hand in Fig. l, is fixed upon a shaftj, which extends from side to side of the arrangement, and also carries the corresponding lever upon the other side of themachine. Upon the same shaft is fixed a lever 7' which is provided with a bowl j which is kept in contact by the weight of the parts wit-h a templet 7r, which is made of the same contour as the side of the work to be engraved, It will be seen that if the cross-heads c c are raised in a vertical line the eight tracer-carriers d will have the same movement and the tracers and the bowl 7'" will be raised in the same degree in contact with the work and the templet. As the said bowl moves in contact with the templet it follows the curvature or contour of the same and imparts a rocking movement to the shaft 7, whereby the levers upon the said shaft raise or lower the plates 72, with which they are connected, and by their connections with the other levers and the connecting-rods effect the corresponding raising or lowering of all the other plates in the two sets. The levers g are so proportioned that the movements of the plates h shall correspond with the movements of the tracers. The result of this is that the plates follow the ends of the horizontal arms of the levers g in their movements, so that the said plates are always but a short distance from the said ends of the arms and are in positions to act promptly when it is desirable to withdraw the tracers from the work. If preferred, the use of a templet might be dispensed with.

The engraving or tracing upon the work is effected by a combination of the rotating or rocking movements of the tables a and the vertical movements of the tracers due to the movements of the cross-heads e e, which carry the tracer-carriers, as aforesaid. The crossheads 0 e are provided with spindles c, upon which are fixed wheels 6 which run upon vertical planed bars 1* r, whereby the said cross-heads are guided to move up and down in a straight line.

The rocking movements of the tables are derived from a wheel Z. (Seen in Fig. 2.) This wheel is connected by steel bands with the reciprocating frame 771., which moves in a direction across the machine, as indicated by the arrows. The vertical movements of the said tables are derived from the bars a of a frame which moves in directions at right angles to the movements of the frame m. These parts m and n roll upon wheels and are connected with the tracer-arm of the pantographmachine. In Fig. 2, 0 represents a part of the said tracer-arm, the end carrying the. tracer not appearing for want of space in the drawings. The movements are conveyed to the frames by means of inclined adjustable slides, so that the movements of the tracer over the pattern are conveyed in a diminished ratio to the frames, as is well understood, the construction of the pantograph apparatus not being claimed herein as novel. One of these inclined slides appears at w in Fig 2. This slide transmits movement to the frame m, which is connected by means of bands Z with the wheel Z, and this wheel is connected by other bands with two bars 19 p, which are mounted to move endwise in a straight line with a minimum of friction, as in ordinary pantograph-machines. These bars 10 p are connected by bands (1 with wheels q (1, each bar connecting two of the last-named wheels with the main wheel Z. It will be seen that when the wheell is rotatedto any extent in either direction all the four wheels (1 (1 will receive a corresponding circumferential movement in the same direction. The

wheels (1 q are fixed upon the hollow shafts.

a, which carry the four tables in the lower series. The wheel Z is fixed upon a shaft which extends upward and carries a second wheel Z, which is connected with four wheels g, which are upon the hollow shafts which carry the tables in the upper set. The effect of this arrangement is that all the eight tables receive motion from the wheel Z,which is actuated by the pantograph, as aforesaid, so that the work upon the tables is caused to revolve partly upon the axes of movement of the said tables when the frame at is moved. The cross-heads e e, which are connected together by means of the rods ff, as aforesaid, are raised and lowered by means of a wheel r, which is fixed upon a shaft 7*. Upon the same shaft are fixed two wheels 8 s, which rest upon the pantograph-bars n n, so that as ICC these bars move the said shaft is caused to 7.

turn upon its axis. The connection of the two cross-heads e e is effected by means of four rods, two of these appearing in full in Fig. 1, the other two being indicated by dotted lines. These latter two are extended downward and appear at f f in Fig. 2. The lower ends of these rods f are connected to gether by means of a bar f and are attached to one end of a band '1", which passes over and is attached to the wheel 0, and is connected by its other end with a load 6, which is adjusted to balance the weight of the crossheads 0 e, the tracer-carriers (Z (Z, and all the other vertically-moving part-s carried by the said cross-heads. It will be seen that when the bars 92 move in either of the directions indicated by the arrows the cross-heads e e,

and as a consequence the whole of the tracers on the levers will be raised or lowered, as

the case may be. It will thus be apparent that as the pantograph-tracer travels over the pattern and the parts on n are moved to and fro the pattern will be reproduced upon the work by the combination -of the revolving motion of the work and the vertical movements of the tracers.

All the tracers can be withdrawn from action by means of a lever-u. (Indicated by the dotted lines in Fig. 1.) This lever may be adapted to be acted upon by the foot of the operator. The upper end of this lever carries the templet k. \Vhen the front end of the lever-that is, the end which does not appear in the drawingsis depressed, the templet is moved in the direction indicated by the arrow, and by acting upon the lever eifects the withdrawal of all the tracers by reason of their hereinbefore-deseribed connection with the lever j".

I do not confine myself to the number of tables to carry the work in each set, as there might be less than four or there might be more than four. It will be seen that each of the bars p might be connected with more than two band-wheels, or the wheel Z might impart movement to more than two bars, fulfilling the office of the bars 1); also, if preferred, there might be more than two sets of tables arranged at diiferent levels; butit is obvious that a multiplication of the tables would increase the work, which the pantograph apparatus would have to do, so that if there were too many tables there would be a diffieulty in correctly following the lines of the pattern. If preferred, the tables carrying the work might be raised and lowered and the tracer-carriers be rotated or vibrated upon vertical axes.

hat I claim as my invention is- 1. In a pantograph engraving-machine, the combination, with a plurality of tables mounted and adapted to vibrate upon vertical axes, of a hollow shaft, a post inside the same, and means for imparting both a vertical and rotary motion to said tables, substantially as set forth.

2. In a pantograph-machine, the combination, with a plurality of tables mounted and adapted to vibrate upon vertical axes, of a hollow shaft, a post inside the same, and two steel centers on said hollow shaft, one of which rests in a seating in the upper and the other in the lower end of the said post, thelatter center being carried by an arm attached to the wheel upon the hollow shaft, whereby it is moved, substantially as specified.

In a pantograph-machine, the combination, with the tables a, hollow shaft ct, provided with centers a post 1) within said hollow shaft, wheels q, bands g connected therewith, barsp,an d cross-heads 6, connected by arms f f, of the shaft r wheel 0', fixed thereto, bars at n, and wheels 3 s, resting thereon, whereby when said bars move motion is V communicated to the cross-heads e e and said tables are moved, substantially as specified.

at. In a pantograph-machine, the combination, with the tracer-carriers (Z, tracer-levers q, plates N, levers t' i, rods 2' shaft j, bowlj, and templet Z, of the cross-heads e e, rods f f", connecting the same, wheel-shaft 0*, wheel 1', mounted thereon, wheel 5, and bar 72, whereby motion is imparted through the crossheads to the tracers, substantially as specified.

5. The bars 0;, the spindles e, the wheels Z Z, the cross-heads c, the rodsff, the barf the band r, the wheel 0', the weight If, the wheels 5, and the bars 11, in combination with a pantograph-machine, substantially as and for the purpose set forth.

6. The tables a, the hollow shaft a, the centers (t the posts 1), the wheels 1 q,the bands (1 the bars 27, the bands Z, the wheel Z, the frame 171, the tracer-carriers d, the tracer-levers q, the springs (1 the plates 71., the levers i t', the rods t the shaft j, the lever j, the bowl j, the templet 7c, the bars 91., the spindles e", the wheels 6 the cross-heads c, the rods ff, the bar f, the band '1", the wheel 0, the weight 25, the wheels .9, the shaft .9, and the bars '72, in combination with a pantographmachine, substantially as and for the purpose set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

GEORGE MOULTON.

llitnesses:

DAVID FULTON, FREDK. DILLON.

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