US1625062A - Engraving machine - Google Patents

Description

April 19,1927. 1,625,062

H. G.' TURNER ENGRAVING MACHINE File d Jan. 11, 1926 4 Sheets-Sheet 1 Witnes 6 es I nventor.

Har G. Turner U0 W W %i% 5y MVW Attys:

April 19, 1927. 1,625,062

H. 5. TUIIRNER ENGRAVING MACHINE Filed Jan. 11, 1925 4 She etsSheet z Fig.2.

Vitnes'ses: Inventor Harry G. Turner ar 6% mfl Attyb.

A ril 19, 1927. 1,625,062

H. G. TURNER ENGRAVING MACHINE Filed Jan. 11. 1925 4 Sheets-Sheet 5 Fig.4.

Inventor Harry Glarner.

Attyb VVitnes s es April 19 1927. 1,625,062

H.G.TURNER ENGRAVING MACHINE Filed Jan.11. 1926 4 Sheets-Sheet 4 Fig 7 CH/IET FOE DE TE EM/N/NG LENGTH OF ENG-Q5 VED L/NE OBTq/NHBLE N 5 FOLD THPE, TO ONE QUHRTEZ OF 17:5 3 MT/2E LENGTH. Ll-7Y TFPE ON HEAVY 5 LINE #40) WITH ONE END PLHCED AT 5 POINT MOVE BEES; 2111.5 50 THHT 6& EDGE INTERSECTE Hem/v LINE HT oTHEe END OF TfiPE. THE DIST/YACE l5 0N q/vv HOE/ZONT'HL LINE FQOM I E065 0/: a/aqss RULE TO THE 210 VEBT/CHL. LINE '4," 71-15 5x407 LENGTH OF Z NGQHV D LINE OBTHZ/VAVELE BY sew/- SIG/765B To THEco2A2Es- 6O -RD/VD/AG MUN/3E2 AS INDlcflTL-TD F7 LEFT :55 4

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Witness es: Inventor Harry Gr. Turner:

I YWTM Patented Apr. 19, 1927.

HARRY e. TURNER, oi oHi'oAGo, ILLINOIS.

nNG'nAvING MACHINE.

Application filed January 11, 1926. Serial no. 80,597.

This invention relates to improvements in engraving machines and is chiefly characterized by a lever arrangement for obtaining the reducedmotion connection between the pattern holder and the work table for the spacing movements, p

The main objects of the invention are to produce a simplified reduction motion connection; to produce such a connection in which the lost motion eliminated and in which all the proportions within the limits of the machine may be obtained; to produce such a devicewlii'chmay be quickly set for any desired ratio and which is easily manipulated.

An illustrative embodiment of this invention is shown in the accompanying drawings in whichz- Fig. 1 is a perspective drawing of the machine.

Fig. 2 is a plan view of the right end of the machine as shown in Fig 1, taken below thepantograph mechanism. Fig. 8 is a section on the line of Fig 2.

Fig. 4 is taken on the line 4-4 of Fig. 2.

Fig. 5 is an elevation looking towards the rightend of Fig. 2 with parts section.

Fig. 6 shows details of the ratchet clamp,

Fig. 7 is an illustration of the chartused inconnection with the engraving machine.

Fig. 8 is a perspective view of a fragment of the lever connections;

In this invention, the pattern is carried on a holder which comprises the rim of a wheel as shown in Patent No. 1,471,869, dated c tober 23, 1923'. but instead of using reduction gears a lever arrangement is used for connecting the work table to the pattern wheel. The reducing ino-ti'on lever, has a ratchet connection with the rim of the pattern wheel and a second ratchet connection, spaced from the first connection, for advancing the work table; so that the spacing on the plate is properly reduced from the spacing laid out on the pattern.

In the drawings, the table 1 is supported on legs 2. The paiit'og'raph comprises the equal levers 'ot fi-Xe'd length, 3 and 4. The lever or swing arm 3 is pivoted to the bracket which is fixed to the table 1; and the lever 01" tracer arm 4 is pivoted'to the end of the lever 3 in the joint member 5-. The scriber or graver ariii 6 is slidably adjustable in the cross head 7, which is pivoted in the member 8 which member is slidably adjustable on the arm 3. The link 9 is then pivotally connected to the end of the arm (1' and 1S slidable in the head 91 which 1S pivoted in the slide '41 on the tracer lever 4.

i i normal settings, the distances from the piv'ot oi the arm 3 in the bracket 5 to the pivot in '8', the length of the arm 6 from the pivotin 8 to the end, and the distance from the pivot in the slide 4.1 to the pivot in 5 are all made equal. Then the ratio between the distance between the pivot in the slide 41 and the pivot in the member 5-; to the total length of the tracer arm 4 represents the reduction in the movements to the right and left. And the ratio, which is n rnially made equal tothe above ratio, between the distance fr m the pivot in 8 to the bracket pivot, to the total effective length of the swing arm 3 regulates the reductions of the back and forth movements. Accordingly the reproduction is universally reduced in allth'e' planar dimensions;

The scriber head 10 is mounted in the end of the arm 6 and the tracer head 11 on the endot' the arm 4. The scribing or graving instruine'nt is a rod 12 slid'ably mounted in the hea d 10 and is provided with a diamend point at the lower end thereof.

For raising and lowerihg the rod 12, the

animal-e13 of the ele ct romagnets 14 is pivotahy mounted on the head 10 and is raised or rotated clockwise by means of the spring 15 shown to the right of the pivot support 16. The left end of the armature 13 has a collar 17 surroiin'ding the rod 12 and engaging nn'derthe nut 18 threaded on the upper end of 12. When the electroniagnet 1.4 is (ls-energized, the spring 15 serves to lift the scriber 152, and when energized allows the scriber to fall out its own weight.

The tracer is provided with the handles 19 mounted on a slidable collar 20 which is connected bv yoke 21 to switch 22 carried on the upper end 01 the tracer member 11 and pressed hpwar'dly by the spring 201. hen the fingers are placed on the handle bars 19 to lower the tracer point 23 to er gage the model; the switch 22 is closed and serves to energize the elect-i'o-inagnets 14 and allow the scriber poiiit to tall. 7

The arms are provide-"d with calibration marks so that the p'antograph may be set thereby to any desired proportion for reduction. I

The work table for holding the plate to be engraved is slidably mounted in the groove ways 26 in the surface of the table 1. The pattern wheel 27 is journalcd below the table 1 in the hangers 23 and 29 with the axis transverse with the ways 26, and the top of the pattern wheel extends through a suitable slot 30 in the table top, and is flush with the upper surface of the table 1. A. clamp 31 is provided to clamp the model 32 on the table, and is operated by means of the knee lever In use, the model plate 32 having, for example, letters arranged alphabetically together with corresponding spacing marks 34, is selected and clamped on the table. The pattern showing the word or lines to be engraved is laid outon a strip of paper and the spacing is marked off to the same scale as the spacing on the model. The tape is then pasted on the rim of the model wheel 27 and the wheel is rotated so that the first letter to be engraved is in position at a suitable index mark on the surface of the table. The model is then shifted to the right or left so that the same letter is brought up to the index and is then in proper relation to the tracer point 23.

The letter may then be engraved in reduced proportions, determined by the pantograph adjustment, on the plate 34 which is clamped in place on the work table 25 and positioned in suitable relation to the graver point 12. lVhen the letter is finished it is then desired to advance the plate the proper distance for spacing the next letter.

This is accomplished in the manner and by apparatus which will now be described.

The reduction lever 35 has a shiftable pivot or fulcrum 36, a ratchet connection 37 to the work table 25, and a ratchet connection 38 to the wheel or model holder 27. The wheel 27 is prevented from moving backwards by a notched plate 39 mounted on a stud 40 secured in the table top 1 and pressed inwardly into engaging position by means of the spring 41 on the stud 40, so that when the wheel rim is advanced or moved to the right, (Fig. 1), the plate slides freely on the rim but grips to prevent retraction as soon as the motion stops.

The advancing plate 42 has a notch 43 for engaging the edge of the rim of 27 and is connected by link 44 to the end of the fulcrum bar The rod 45, pivotally mounted concentric with the wheel 27 bears against the plate 42 for retracting the same by be lug connected to the spring 46attached to the table 1. It will now be seen that when the lever 35 as shown in Fig. 2 is moved to the left, the plate 42 will be advanced on the rim of the pattern wheel 25. When the end of the lever is moved to the right, the rim of 25 will be advanced and then held in the advanced position by ratchet catch 39. For moving the end of 35, the bell-crank lever through the plate 42 serves to draw the end of the lever against the inner stop 54.

The driving connection for the work table 25 is as follows: The rod is attached to the table 25 and is slidably guided through the blocks 61 and 62 which are secured on the surface of the table 1. The lever 35 is pivotally connected to a block 63 slidable on the rod 60, which serves to operate the ratchet plate 64. The plat-e 64 is pivotally connected by means of the link 65 to the sliding block 63; and the stop plate 66 is pivotally connected by means of the link 67 to the stationary guide block 61. The holes 68 and 69 in the advancing plate 64 and the holding plate 66 respectively through which the rod 60 extends, are suitably formed so as to loosely slide on the rod when the plates are vertical and effectually grip the rod when the plates are tilted. The spring 70 serves to hold both the plates 64 and 66 in operative or gripping position. The spring 70 is connected at 71 to the plate 64 and is connected'to the end of the support bar 72 secured in the plate 66, and tends to rotate both plates positively about their respective pivotal connections.

For quickly releasing the lock plates, handles 73 and 74 are provided for each plate respectively.

The adjustable fulcrum comprises the head 75 slidable on the bar 35 and pivotally mounted in the cross head 76, which is slidably adjustable on the guide bar 77 secured to the table 1. Since the ratchet connections 37 and 38 are in a fixed spaced relation the amount of the reduction is adjusted by shitting the pivot or fulcrum 36 which thereby changes the leverage of 37 and 38 an equal amount. For equal changes in the reduction portions, the fulcrum 36 is shifted unequal amounts, and gradually the calibrations 7 8 for setting the ratio become further apart towards the rear end of the lever 35. The operation of the ratchet connection 37 is more easily understood from F 3. When the lever 35 is moved to the right, the upper end of the advancing plate 64, connected to through the link 65, and thereby connected to the bar 35, is pulled to rotate the plate 64 clockwise for further gripping the rod 60. with which the plate is already engaged by means of the spring 70. The rod 60 will then follow the movement of 35 and the holding plate 66 will slip since the movement of the rod 60 tends to straighten or rotate the plate 66 counter-clockwise against the action of the spring 70 and pivoted on link 67. When the advancing movement stops, the holding plate is instantly in position to prevent retracted movement. When the lever is moved to the left, the advancing plate 64 is straightened and then slips to advance on the bar 60.

It will now be seen that, to space for the succeeding letter, the bell-crank lever 50: is rotated clockwise to move the end of the lever 35 to the right. The pattern on the rim of the wheel 27 is thereby advanced, through the ratchet connection 38, sufficiently to bring the next spacing mark opposite the ind mark. The work table 25, by the connection 37, will "follow the advancing movement of the pattern wheel 2? and will be similarly held from retractive movement. The corresponding letter on the model is then placed opposite the spacing in rk on the pattern and clan'ut-ed in place. The new letter may then. be traced and the operations continued until the line is completed.

it will be noticed that the slack in; the ratchet mechanism for actuating the patternwheel '27 is always taken up in one direction by the tension, at the spring 46; Also, the slack from wear or other causes in the ratchet connection to the work table 25 is similarly taken up by the spring 7 (l.

i he differential setting of the fulcrum 36 is not limited to step by step, position,,bu-t may beset at any point intermediate the limit of the slidable movement of the fulcrum saddle 76.

For quick setting, the table or chart shown in Fig. 7, the use of which is explained there in, is provided. lVith this chart, the length of the reduced line may be obtained without going through any calculations.

The chart is provided with a vertical line 80 upon which is pivoted at 81, a straight-- edge or rule 82. The horizontal lines 83 are laid the same distance from 8l as the distance of the corresponding markings on a pantograph arm from their pivotal points and then similarly labeled. For example, the line marked 30 is the same distance from the pivot 82 that a marking 01 30 on either of the pautograph arms is from the respective pivot. In order to reduce the size of the chart for convenience, the horizontal tape line 84 may be located one-fourth the length of the .tixed arms, 3 or 5, from the point 81. Then it one-fourth of the length of the pattern is measured on the tape line, and the straight edge set thereto, the intersection of the straight edge with any one of the horizontal lines 83 will show the true length of the re duced line for the pantograph setting corresponding to that line. The straight edge, the vertical reference line 80, and the plurality of horizontal or base lines 83, define similar triangles, the sides of which are all in the same relative proportions. The length this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invent-ion,

I claim:

In combination, in an engraving machine, a table, a scriber and a tracer movably mounted on the table, means whereby the scribe and tracer are interconnected relatively proportioned movement, a work support slidably mounted on the table in relzi 'on with said scriber, a pattern. holder movably mounted in the tablein relation with said tracer, and: a lever having an adjustably positioned fulcrum on the table aiul connected to said; support and to said hold 3 "for simultaneously and proportionally mo ing the same.

2. In combination in an engravin machine, a table, a pantograph pivoted to the table and having a graver and a tracer in reduced motion relation, a work sup-port slidably mounted on said table in relation with the gr-aver, a pattern holder n'uu-iably mo'unted in the tablein relation with the tracer, and a lever adjustably fulc-ruuied to the tableand connected to said support and to said holder for simultaneously and proportionally movingthe same,

3. In combination in a device of the class described, a table, a work support slidably mounted on the table, a pattern holder movably mounted in the table for movement parallel to movement of said support, a lever, a fulcrum for the lever mounted on said table, said fulcrum being adjustable on the lever and adjustable on the table in a direction transversely to the movement ot' said parallel means, a ratchet connection between the support and the lever, and a ratchet connection between the holder and the lever, and spaced from said first named connection for causing a simultaneous differential movement between the support and the holder upon rotation oi the lever.

4. In combination in an engraving machine, a table, a work support slidably mounted on the table, a pattern wheel rotatably mounted in the table, a ratchet stop mounted in the table for holding the wheel from turning in one direction, a lever, a t'ulcrum member slidable on the lever and adjustaloly positioned on the table, a ratchet connection between the lever and the wheel for moving the wheel in the other direction, a ratchet stop for holding said support in one direction and a ratchet connection in fixed spaced relation with said ratchet connection between the lever and the support for moving the. support in the other direction.

5. In combination in an engraving machine, a Work support, slidable in one direc tion, a pattern holder movable in the same direction, a lever having a connection to said support and having a connection to said holder fixedly spaced from said connection and a fulcrum for the lever adjustably spaced from said connections.

6. In combination in an engraving machine, a table, a Work support slidably mounted on the table, a differential lever adjustably fulcrumed to said table and hav ing a connection for advancing said sup port, a pattern holder comprising a Wheel rotatably mounted in the table in parallel relation with the sliding movement of said support, a ratchet mounted in the table and comprising a plate having a notch engaging the rim of said Wheel for preventing retractive movement, and a ratchet connection br. tween said lever and Wheel for advancing the Wheel comprising a plate having a notch engaging the Wheel rim and pivotally linked to said lever, and resilient means applied to the second mentioned plate for retracting the lever and advancing the plate on the rim of the Wheel.

7. In an engraving machine of the class described, a table, a Work support slidably mounted on the table, a pattern holder movably mounted in the table for movement unidirectional with the movement of said support, a differential lever having a con nection for advancing said pattern holder, a fulcrum for said lever adjustably positioned on said table, resilient means for retracting the lever, a connection for advancing said Work support comprising a rod connected to the support, a plate having an aperture in Which the rod is inserted, a link pivotally connected to the plate and to the lever, and resilient means for advancing the plate on the lever.

8. In combination in an engraving machine, a table, a Work support slidably mounted on the table, means for shitting the Work support comprising a lever having a ratchet connection for advancing the support, and a fulcrum for the lever adjustably positioned on the lever and adjustably secured to the table, a stop for the advance of the lever, resilient means for urging the lever against said stop, and means for retracting the lever a desired distance.

9. In an engraving machine, a table, a support for holding the Work and a support for a model movably mounted on said table in spaced parallel relation thereto, means whereby a pattern placed on the table in relation to the model may be reproduced on the Work, and a lever pivoted to the table and pivotally connected to each of said supports whereby said Work support may he moved in fixed relation to movement of said pattern support.

Signed at Chicago this 23rd day of December 1925.

HARRY G. TURNER.

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