US2339716A - Tool-marking machine - Google Patents

Description

Jan. 18, 1944. NACHEMQV 2,339,716

TOOL MARKING MACHINE v Filed Dec. 26, 1942 3 Sheets-Sheet l 44 INVENTOR,

,L eoua'rd Nae/10mg! fla /i. M, W4

w ATTORNEY Jan. 18, 1944. k NACHEMOV 7 2,339,716

TOOL MARKING MACHINE A Fil ed Dec. 26. 1942 a Sheets-Sheet 2 17 m (Z3 2 g? 4146 w Jan. 18, 1944. L. NAYCHYEMOV TQOL MARKING MACHINE Filed Dec. 26. 1942 3 Sheets-Sheet 3 INVENTOR. Z eolmrd lVac/r @0200 Patented Jan. 18, 1944 UNHTED STATE TOOL-MARKING MACHINE Leonard Nachemov,

New York, N. Y.,

signor to Abraham J. Sossner, Theodore S. Sossner, and Nettie Sossner, a copartnership doing business as Sossner Steel Stamps, New

York. N. Y.

Application December 26, 1942, Serial No. 470,311

20 Claims.

The present invention relates to marking machines and particularly to the type employing a pantographic device, and adaptable for the marking of tools and other varieties of articles.

An object of this invention is to provide a machine of the character mentioned, of novel and improved construction, for simultaneously marking a series of articles with desired characters thereon, employing copying marking implements with provision whereby they can be lifted or otherwise shifted from operative copying position and. free of the work, though the manually operated master stylus is in operative position with respect to the master pattern, for examination of the progress of the Work at any time, and to avoid superfluous and of course unwanted marking by the copying implements during intervals of shifting the master stylus from character to character on the pattern plate.

Another object hereof is to provide a novel and improved machine of the type set forth for the marking of metal articles as taps, drills, bits and other tools, by electric arc etching, a process advantageously employed in a machine following the teachings of this invention.

A further object of this invention is to provide an improved and novel machine employing a pantographic device, Where the pressure of the individual copyin marking styluses is independent of the pressure applied manually by the operator to the master stylus on the pattern plate.

Another object hereof is to provide a novel and improved machine of the kind mentioned, in which the pantograph frames are counterbalanced for maintaining inoperative position, and uneffected by the counterbalancing means for self-maintenance of their shifted position during operation.

A further object of this invention is to provide a machine of the character mentioned, of novel and improved construction, adaptable for copying markings by various processes employing some form of stylus or its equivalent for the copying implement in the practice thereof, which is easy to use, simple to adapt for the marking of various types of articles, and efficient in carrying out the purposes for which it is designed.

Other objects and advantages will become manifest as this disclosure proceeds.

In the accompanying drawings forming part of this application, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 is a front view of a machine embodying the present invention, omitting various parts for the sake of clarity.

Fig. 2 is a top view thereof.

Fig. 3 is a side view of said embodiment, shown partly in section.

Fig. 4 shows the pantographic-mechanism included in said machine, the frames of which it is comprised, normally being in angular relation, but here shown substantially coplaner to facilitate explanation of the device.

Fig. 5 is a diagrammatic side view showing the mechanism for controlling-the position and operation of the marking styluses.

Fig. 6 is a fragmentary view showing stop meansv employed for limitingthe movement of the frames of the pantographio device included in the within embodiment.

Fig. 7 is a partly sectional side view of an electrically operated stylus vibrator mechanism'in cluded in the machine illustrated.

Fig. 8 is a section taken at line 8-8 in Fig '7. Fig. 9 is a diagrammatic fragmentary sectional view showing a preferred construction of the master stylus and the character grooves in the pattern plate used with the machine described.

Fig. 10 is a plan view of a pattern plate showing the characters, in this instance thenumerals indicating the size. to be simultaneously marked or copied onto the shanks of a series of taps.

Fig. 11 shows th wiring diagram for opera- 7 tion of a stylus Vibrator mechanism illustrated in extending brackets ll, between which brackets,

on the horizontally aligned pintles I8, is swingably mounted a frame designated generally by l9, along a line near the rear end of said frame. This frame l9, extends forwardly, and in the embodiment illustrated, is positioned substantially horizontally during operation. Said frame [9, comprises the side arms 20 and thetie-rods 2| and 22; the former along the'rear ofsaid side arms, and the latter secured to said arms intermedite the ends of said arms. A shaft 23, which serves as a pulley, is journalled between the pintles l8 within the confines of the frame It. Said frame l8 together with another frame it.

a ll'el'withthe shafts 23 and 34.

comprise a pantographic device, in which, said frame 24, is normally in upright position, is hingedly or pivotally associated with the frame l9, and includes the pivotal joints 25, 25, 2"! and 28, which axes determine a parallelogram; said axes being parallel to each other and perpendicular to the axis of the pintles l8.

Said frame 24, comprises the side arms 29 and 3!! the latter being comparatively long, the lower cross beam 3!, and the spaced blocks 32, mounted at the ends of the tie bar 33; the upper 'ends of the side arms 29 and 30, being respectively pivotally secured to said blocks 32, on the axes 25 and 26 aforesaid, and the .cross beam 3i being pivotally secured at the lower end of side arm 29 on the aforesaid axis 21; and intermediate the ends of the long side arm 30, at axis 28; said cross beam 3!, being preferably horizontal, that is, the line connecting axes 25 and 26, and the line between the axes 21 and 28, are parallel and horizontal.

The blocks 32, which are pivotally carried at the upper ends of the side arms 29 and 30 re- "spectively, are each mounted free to swing on "thenhorizo-ntal shaft 34, which is journalled betweenlth'e aligned pintles 33 at theforward ends of the side arms 20 of the frame [9. It is to be noted that there is no'zmovement of said frame IQ'al'on'g the line of the axis 'of'pintles l3, and that the length of'bar33 issuch as to maintain the blocks 32, against movement longitudinally along the axis of the pintles 33. The shafts 23 and d l are parallel to each other and to the beam 3|. This beam carries a series of independent marking mechanisms 35, each of which include a stylus 35 forward ofsaid beam 3|; the axes of all such styluses are coplaner, and the lower or marking extremities of all of said styluses preferably are colinear along a horizontal par- A balancing means may be provided to include a counterweight 31, adjustably securable along a bar 38,

- 4'0' determining characters or insignia formed on pattern plate H, which is removeably mountable within' track bars 42 of the pattern holder 43 on a low level table 44.

' Infthe 'embodimen't illustrated, copying is performed "by etching on metal objects, as the taps 45, by the electric-arcing process, where each stylus aficonsists of arod body 35' having needle element ends 33". However, depending upon the nature of thearticles tobe marked, or the copying to be done, the styluses'may be of different character, as for instance pencil points or fountain pen devices.

When the machine is not in marking operation} bar 3!! is raised so that master stylus '35, is'above, and out of contact with the'pattern pl'ate tl, and whereby frame l9 will swing to a position forward edge upwardly, and counterweight}? will lie about horizontal; stop member dfifx'naking contact with bartl, to limit upward movement ofthe frame'fill, at which position, the moment arm of the counterweight 31, with respect to axis 18 is at a maximum and maintains this frest position of the machines components.

For operating position, the operator holding stylus holder 41, lowers same until master stylus 38 enters a groove use: 'the'pattern plate 4|,

moment of same with respect to axis l8 exceeds,

in such operating position, the moment of the counterweight 31 with respect to said axis I8; the position of said counterweight being so set along arm 38, to accomplish such result.

In the embodiment of this invention illustrated, as previously stated, electric are burning or etching is employed for copying the desired markings onto the shanks of metal articles, as for instance a series of taps 45, which are mounted respectively below the styluses 36, in any suitable :fixture Lor holder d5, removeably mounted on table 1.5;

Eachstylus is removeably mounted in vertical bore 49 of a stylus holder 51] by means of a set-screw 5!. For operation, each stylus 36,

in contact with a tap 45, has imparted thereto a vibratory motion so that the stylus is shifted in and out of contact with its related tap 45. Such motion-producing means, for each stylus 36, comprises an electromagnetv 52, mounted along beam 5i, to be operated by an alternating current for actuation of an armature 53. An angle bracket 5d, isse'cured to the magnet core body 52', and another angle bracket '55, is secured to "the armature 53. The stylus holder 52!, has extending upwardly therefrom, the pins 56' and 51, which pins slidingly fit loosely through holes in bracket 54; pin 51', also extending slidingly through a. hole in bracket 55. Above bracket 54, pin 56 carries an adiustably secured stop collar 53', having a vertical bore 59, to receive the shank of a hook 55 which is positioned therethrough. In order that stylus ho1der 50, be electrically insulated from the remainder of the structure, insulation elements El, 62 and 63 are provided. Upon lifting hook iii], the stylus holder 5B is lifted from the tap 45, while upon lowering hook 68, the said stylus holder will fall due 'to its'own weight, until the etching tip of stylus 3.6 touches tap 35; the position of stop element .58 being such as to permit a greater fall than is above required and the shank of the hook 69 is preferably loose in upright bore 59. Regardless of stylus holders 50 position, meaning whetherit is raised from the tap 45 up to bracket 54, which is out of marking'position, or lowered so that stylus 36 touches the tap 45 it is to mark, which is marking position, or while said stylus holder is sliding from one such position to another, during actuation of the armature 53, said stylus holder 59 will vibrate, as of course will the stylus 35 it holds.

The hooks (it, are at the lower ends of cords 5 -3, the upper ends of which cords are secured to and wound a little in a clock-wise direction about shaft 34, so that upon rotation of said shaft, said cords are wound or unwound, depending upon direction of such rotation, the extent of which shaft movement is small, whereby the styluses 35 are raised or lowered. An elastic element or spring 55 may be interposed in each of the cords (it; The shafts 34 and 23 are connected by a belt 55, which may have an elastic element or spring 61 interposed therein.

On table I '5, is mounted a solenoid 68, having an armature 69, moveable therein horizontally, and a bracket H3. An arm H, islinked at its ends 72 and 13 to the bracket 1.0, and forward end of the armature 69, respectively. Said bracket Hi, also carries a pulley l4, rotatably mounted thereon, at 14'. A cord l5, having an elastic or spring element 16 interposed therein, is connected at its ends TI and 18, to the bracket it, and the arm II, respectively; said cord 15 passing over shaft 23, and under pulley 14, whereby upon movement of the solenoid armature 69, the shaft 23 will be turned. Said armature 69, is adapted to move within the solenoid coil 84, upon excitation of said coil, and to withdraw outward from said coil of the solenoid by action of a spring (not shown) upon opening of the solenoid circuit Fig. 13. Therefore, upon excitation of the solenoid, its armature 69 moving to the right in Fig. 3, will cause shaft 23, to turn a little clockwise, and upon cessation of solenoid operation, the resulting withdrawal of the armature 69, the action of the stressed spring 16, will cause shaft 23, to turn a little counter-clockwise; the scope of movement of said shaft 23, being such as to move the stylus holders 50, the required distance,

Due to the inclined positions the master stylus 39 may assume, the tip thereof, is preferably made semi-circular, while the groove 40 of the characters of the pattern plate 4|, should be a trough having semi-circular bottom of substantially identical dimension as said stylus tip, with divergent sides 43, as an example of construction to take care of such condition.

The electrical circuit for any of the stylus vibrators 35, reference is made to Fig. 11, which shows magnet 52 of said vibrator, in the secondary circuit of a step-down transformer l9; the primary circuit of said transformer, having a switch 85] interposed therein. The frame of the machine being a conductor indicated by the ground symbol G throughout all the wiring diagrams herein. The electrical circuit for accomplishment of the arc etching, referring to Fig. 12, which shows a hook up as to each copying stylus 33, including a step-down transformer 8! having a Variable primary 82, control of which adjusts intensity of arcing across gap formed between stylus 36 and its related tap d5.

A conductor 83 connects the stylus holder 59 to a terminal of the secondary of the transformer 8|; the remaining terminal of said secondary and the fixture or tap holder 48 being connected to the frame of the machine. The electrical circuit for control of the solenoid 63, referring to Fig. 13, shows the solenoid coil 84 connected in a circuit controlled by a switch 86, preferably of the push-button type.

In the set up of the machine during non-operation, the master stylus 39 is in raised position, out of contact with the pattern 4! which has the grooved characters, say 832, the size to be marked on the shanks of a series of identical taps 45, mounted in horizontal tandem alignment in a suitable fixture 48, positioned on table It so that each tap 45 is directly under a stylus 3E. The swing frame I9, is positioned tiltingly forwardly upwardly with stop member AS resting on beam 3| of the jointed frame 2 3; all electrical circuits are open, the armature 33 is in retracted position out of coil 84 of the solenoid E38 as specifically shown in Fig. 3, and the counterweight 31 has assumed near horizontal position; each of the cords 64 is wound a little around shaft 34,

and all stylus holders 50, are in their raised position respectively up against the brackets 55.

In operation, all circuits of the stylus vibrators are closed, thereby actuating the vibrator armatures 53, the movement of which impart a vibratory, and relative to the taps 45, a substantially up and down movement to each of the copying styluses 35, also, all etching circuits are closed. Arm 30 is pulled downward and master stylus 39 is set into a pattern character groove All; the lower tips of the styluses 36, though the jointed frame 24 is in lowered position, will be above the taps 45, and respectively form greater gaps therewith, than across which sparking will occur.

Now, upon closing push buttom switch 86, which preferably is held in the left hand of the operator, the solenoid armature 69, will be drawn into coil 83, thereby shifting link H, from its rest position of Fig.3, to that shown in Fig. 5, pulling cord l5 and (tensing spring 13) whereby shaft 23, will be rotated a little in a clockwise direction, and due to movement of belt 66, shaft 34 will likewise rotate a little in the same direction, the necessary extent of movement of these shafts being less than a revolution, thereby unwinding the cords fi l sufficiently for lowering the hooks (53, whereby stylus holders 5!), will drop due to gravity, the springs E55 taking up any shocks of the fall, until the lower tips of the marking styluses 36, in their lowest vibratory position, contact the respective taps t5. During the upward vibratory movements of said styluses 36, they break their contact with said taps 45, and at their lowest position during vibratory movement, said styluses 33 make contact with said taps respectively, whereby the heat of the resulting electric arcing between the respective styluses 33 and taps 45, causes a burning or etching of the tap surfaces. Now, movement of the master stylus 39 by the operator, along all the characters of the pattern plate, will cause similar markings to be etched onto the taps the etched markings being obviously of reduced size with respect to the dimensions of those on the pattern plate ll, in such ratio, substantially as the distance between points 26 and 28, is to the distance between the points 26 and the lower tip of the master stylus 33.

At any time during operation, the marking or etching can be made to cease, as is desirablewhen the master stylus 39 is passed from character to character of the pattern plate 4!, where such characters have no connecting groove, by merely releasing hold on push button switch 86, thus opening the solenoid circuit Fig. 13, whereby armature 63, will due to a stressed spring acting thereagainst, automatically be moved outwardly fro-m coil 85, until said armature reaches a fixed stop member 81, whereupon spring it, in being unstressed, by resulting movement of link i I, will pull cord 75, whereby shaft 23, and in turn, shaft 3%, will both rotate back in counter-clockwise direction to original position of rest. It is evident that cords will wind up on shaft 35, thus, hooks 5t will lift the stylus holders 3d, and of course the styluses 35 with them, to original non-etching raised position; the springs t5 taking up any shock. Such lifting of the styluses 33, should be accomplished before the master stylus 33 is taken out of the groove of one of the pattern plate characters, for placement into another of the characters. It is true, that by raising arm 3? the jointed frame 24 and the styluses 36, are likewise lifted. But during the movement of the master stylus 3Q from one groove to another on the'pattern plate, continued operation of the etching circuits,

would cause continued arcing between the styluses 36 and the taps 45, and hence marking of the taps will continue after the master stylus leaves the first groove and being a little before said master stylus 39 enters the second groove, whereby unwanted and therefore objectionable marking would be etched on the taps during such intervals, which may even be lines connecting the individual etched characters. Another advantage of being able to lift the Styluses 35 from off the work, meaning the taps 45, is to enable the operator to view the progress and character of the work being performed at any stage, without the necessity of shifting the pantograph frames l9 and 24, or taking the master stylus 39 out of pattern M.

It is to be noted that the possible vertical movement of the stylus holders 50, independent of position of beam 3 l, and independent of each other, permits taps or other articles of different sizes, but identical in any individual setting in a fixture 48, to be marked by this machine, because the marking plane of the styluses 36, need not be a constant, and slight variations in dimensions of the parts to beidentically marked,wou1d not effect copying operation of any of the individual styluses 38. This freedom of movement of the stylus holders 50, makes the pressure of an individual marking stylus, regardless of the type which may be employed and its process of marking, to be the weight of the stylus and its holder 59, and such pressure of the copying point is constant and is not varied or effected by the pres- .sure used by the operator of the master stylus 39 on the pattern plate 4|.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the description and terminology and phraseology employed herein be deemed illustrative and for purposes of explanation, and not by way of limitation, and that the specific embodiment set forth shall also be deemed merely illustrative and not restrictive; reference being had to the following claims rather than to the particular description herein set forth to indicate the scope of this invention.

I claim:

1. In a machine of the character described, the combination with a fixed frame, of a link means moveably mounted on said frame, a normally substantially uprightly positioned frame, including a pair of spaced elements swingably secured to the link means; said elements being lifted or lowered upon movement of said link means, a pair of side arms pivotally secured dependingly from said elements respectively, a beam pivotally connected across the side arms at a point on each arm below the other pivotal connection of the respective arms; the respective distances between the axes of the pivotal connections along each of the side arms, being equal; the distance between the axes of the pivotal connections of the beam, and the distance between the axes of the pivotal connections of the side arms on the elements, being equal; and the axes of all four pivotal connections of said side arms being parallel, a master stylus depending from one of the side arms, a pattern plate having characters thereon, positioned below the master stylus, one or more marking ,holder, and a table member below the marking means, adapted to receive articles to be marked thereon; whereupon lowering the upright frame, the master stylus will contact a character on the pattern plate and each marking stylus, carried on the beam thus lowered, will contact one of said articles.

2. A machine as defined in claim 1, wherein each marking stylus holder is moveably mounted on the beam, adapted to be raised and lowered with respect to said beam and including means to raise and lower each marking stylus holder with respect to said beam.

3. A machine as defined in claim 1, wherein each marking stylus holder is moveably mounted on the beam, adapted to be raised and lowered with respect to said beam and including means to raise and lower each marking stylus holder with respect to said beam; the distance each of the holders are lowerable with respect to the beam, being greater than the distance between a marking stylus and the article it is to mark, when the beam is at its lowest operating position determined when the master stylus is in contact with a character on the pattern plate.

4. A machine as defined in claim 1, wherein is included a shaft journalled on the upright frame, and a cord for each marking stylus holder, supporting said holder at the lower end of said cord; the upper end of each cord being mounted on the shaft, whereby upon rotation of the shaft in one direction, each holder will be lowered with respect to the beam, and upon rotation of said shaft in reverse direction, each holder will be raised with respect to said beam; each marking stylus holder being moveably mounted on the beam, adapted to be lowered and raised with respect to said beam.

5. A machine as defined in claim 1, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and raised with respect to said beam, and including a shaft journalled on the upright frame, and a cord for each marking stylus holder, supporting the holder at the lower end of said cord; the upper end of each cord being mounted on the shaft, whereby upon rotation of the shaft in one direction, each holder will be lowered with respect to the beam, and upon rotation of said shaft in reverse direction, each holder will be raised with respect to the beam; each cord having a resilient portion.

6. A machine as defined in claim 1, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and raised with respect to said beam, and including a shaft journalled on the upright frame, a cord for each marking stylus holder, a stop member at the lower end of each cord; each holder being freely slidable on its related cord; the upper end of each cord being mounted on said shaft, whereby upon rotation of said shaft in one direction, each holder will be lowered with respect to the beam, and upon rotation of said shaft in reverse direction, each holder will be raised with respect to the beam; the extent of downward movement of each stop member, ex ceeding the extent of downward movement of its related holder when each marking stylus is in contact with an article to be marked.

'7. A machine as defined in claim 1, wherein each marking stylus holder is moveably mounted on the beam, adapted to be raised and lowered with respect to said beam, and including means to raise and lower each holder with respect to the beam, means to vibrate each holder, carried on said beam; said vibrating means including an electromagnet and an electrical circuit including said magnet, a switch and a supply of electrical energy, and an electrical circuit adapted for arcing to occur between each markink stylus and the article it contacts periodically upon vibratory movement of the holder; said arcing means comprising a source of electrical energy connected to the marking stylus and the article to be marked; both stylus and article being electrical conductors; the vibrating means being independent of the means to raise and lower each marking stylus holder.

8. In a machine of the character described, the combination of a normally substantially horizontally positioned frame, swingably suspended about a fixed horizontal axis, a pair of spaced elements swingably mounted at the forward end of said swingable frame, about an horizontal axis; said axes being co-planar, a normally substantially uprightly positioned frame, comprising a pair of side arms pivotally secured dependingly from said elements respectively, a beam pivotally connected across the side arms respectively, at a point on each arm below the other pivotal connection of the respective arms; the respective distances between the axes of th pivotal connections along each of said side arms being equal, and the distance of the line between the axes of the pivotal connections of the beam being equal to the distance of the line between the axes of the pivotal connections of the side arms on said elements, and the axes of all four pivotal connections of said side arms being parallel to each other and in angular relation to the axis about which said elements swing, a master stylus depending from one of the side arms, a pattern plate having characters thereon, positioned below the master stylus, one or more marking-stylus holders carried on the beam, a marking stylus depending, one from each stylus-holder and a table member below the marking means, adapted to receive thereon the articles to be marked.

9. A machine as defined in claim 8, wherein the axis about which the horizontally positioned frame swings, and the axis about which the elements swing, are parallel, and the axes of all four pivotal connections of the side arms of the normally upright fram are in perpendicular direction with respect to the axis about which said elements swing.

10. A machine as defined in claim 8, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and raised with respect to said beam and including means to lower and raise each marking stylus holder with respect to said beam.

11. A machine as defined in claim 8, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and raised with respect to said beam and including means to raise and lower each marking stylus holder with respect to said beam; the distance each of said holders are lowerable with respect to said beam, being greater than the distance between a marking stylus and the article it is to mark, when the beam is at its lowest operating position determined when the master stylus is in contact with a character on the pattern plate.

12. A machine as defined in claim 8, wherein is included a shaft journalled on the upright frame, and a cord for each marking stylus holder, supporting said holder at the lower end of said cord; the upper end of each cord being mounted on the shaft, whereby upon rotation of the shaft in one direction, each holder will be-lowered with respect to the beam, and upon rotation of said shaft in reverse direction, eachl'holder will be raised with respect to said beam; each marking stylus holder being moveably mounted on the beam, adapted to be lowered and raised with respect to said beam.

13. A machine as defined in claim 8, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and raised with respect to said beam, and including a shaft journalled on the upright frame, and a cord for each marking stylus holder, supporting the holder at the lower end of said cord; the upperend of each cord being mounted on the shaft, whereby upon rotation of the shaft in one direction, each holder will be lowered with respect to the beam, and upon rotation of said shaft in reverse direction, each holder will be raised with respect to the beam; each cord having a resilient portion.

14. A machine as defined in claim 8, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and-raised with respect to said beam, and including a shaft ournalled on the upright frame, a' cord for each marking stylus holder, a stop member at the lower end of each cord; each holder being freely slidable on its related cord; the upper end or each cord being mounted on the shaft, whereby upon rotation of said shaft in one direction, each holder W111 be lowered with, respect to the beam, and upon rotation of said shaft in reverse direction, each holder will be raised with respect to said beam; the extent of downward movement of each stop member, exceeding the extent of downward movement of its related holder when each marking stylus is in contact with an article to be marked.

15. In a machine as defined in claim 8, wherein each marking stylus holder is moveably mounted on the beam, adapted to be lowered and raised with respect to said beam, and including means to vibrate each holder, carried on said beam; said vibrating means including an electromagnet and an electrical circuit including said magnet, a switch and a supply of electrical energy, and an electric circuit adapted for arcing to occur between each marking stylus and the article it contacts periodically upon vibratory movement of the holder; said arcing means comprising asource of electric energy connected to the marking stylus and the said article to be marked; both stylus and article to be marked being electrical conductors; tIllieavibriating means being independent of the e ns 0 rais holder. e and lower each marking stylus 16. In a machine as defined in claim 8 wh 111 each marking stylus holder is movegb l y mounted on the beam, adapted to be lowered and raised with respect to said beam, and wherein is included a shaft journalled on the upright frame, a cord for each marking stylus holder supporting said holderat the lower end of said cord; the upper end of each cord being mounted on the shaft, whereby upon rotation of the shaft in one direction, each holder will be lowered with respect to the beam, and upon rotation of said shaft 1n reverse direction, each holder will be raised with respect to said beam, a. pulley rotatably mounted on the axis about which the horizontally positioned frame is swingably mounted a belt connecting the ,pulley and shaft, a bracket and a solenoid having a moveablearmature,

mounted on afixed part of themachine, an arm linkedto said bracket and armatura a second pulley rotatably mounted on the bracket, a belt having a resilient portion, positioned over'and with its strands depending from the first pulley; the ends of one strand being fixed to thebracket; the other strand passing under and contacting the second pulley and its end being secured to the linked arm; said strands not being connected to each other at their lower ends, a circuit adapted to actuate thesolenoid comprising said solenoid, a switch and a source of electrical energy, whereby upon excitation of said solenoid, the shaft will be rotated in one direction, and upon opening the solenoid circuit, the return of the stressed resilient portion of the second belt to unstressed condition, the shaft will be rotated in reverse direction.

17. In a machine as defined in claim 8, wherein each marking stylus holder is moveably' mounted on the beam, adapted to be lowered and raised with respect to said beam, and wherein is included a shaft journalled on the upright frame, a cord for each marking stylus holder, supporting said holder at the lower end of said cord; the upper end of each cord being mounted on the shaft, whereby upon rotation of the shaft in one direction, each holder will be lowered with respect to the beam, and upon rotation of the shaft in reverse direction, each holder will be raised with respect to the beam, a pulley rotatably mounted on the axis about which the horizontally positioned frame is s'wingably mounted, a belt connecting the pulley and shaft, a bracket and a solenoid having a moveable armature, mounted on a fixed part of the machine, an arm linked to said bracket and armature, a second pulley rotatably mounted on the bracket, a belt having a resilient portion, positioned over and with its strands depending from the first pulley;

the end of one strand being'fixed to the bracket; the other strand passing under and contacting the second pulley and its end being secured to the linked arm; the strands not being connected to each otherat their lower ends, a circuit adapted to actuate the solenoid, comprising said solenoid, a switch and a source of electrical ener y, whereby upon actuation of the solenoid, the shaft will be rotated in one direction, and upon opening the solenoid circuit, the return of the stressed resilient portion of the second belt to unstressed condition, the shaft will be rotated in reverse direction, means to vibrate each marking stylus holder, carried on the beam; said vibrating means including an electromagnet and an electrical circuit including said magnet, a switch and supply of electrical energy, and an electrical circuit adapted for arcing to occur between each marking stylus and the article it contacts periodically upon vibratory movement of the holder; said arcing means comprising a source of electrical energy connected to the marking stylus and the said article to be marked; both stylus and the article to be marked thereby, being electrical conductors; the vibrating means being independent of the means to raise and lower each marking stylus holder.

18. In a machine of the character described, the combination of an inverted U-shaped frame, a pair of pintles mounted in spaced horizontal alignment on said frame, a substantially horizontally positioned frame, swingably suspended on said pintles, a pulley shaft journalled between said pintles, a second pair of pintles mounted in spaced horizontal alignment at the forward endof said horizontal frame; the axes of all said pintles being paralllel, a pair of elements swing-- line between the axes of the pivotal connections of the side arms on said elements, and the axes of all four pivotal connections of said side arms being parallel to each other and in perpendicular relation to the axis about which said elements swing; the axis about which said elements are swingably mounted being the horizontal axis of the second pair of pintles, a bar secured to Said elements whereby said elements are maintained in spaced relation, 3, master stylus depending from one of the side arms of the upright frame, a pattern plate having characters thereon, positioned below the master stylus, one or more marking stylus holders moveably mounted on the beam, adapted to be lowered and raised with respect to said beam, a marking stylus, depending, one from each stylus holder, a table member below the marking means, adapted to receive thereon the articles to be marked, a cord for each marking stylus holder, supporting said holder at the lower end of said cord; the upper end of each cord being mounted on the shaft between the second pair of pintles, whereby upon rotation of said shaft between the second pair of pintles in one direction, each holder will be lowered with respect to the beam, and upon rotation thereof in reverse direction, each holder will be raised with respect to the beam, a belt connecting the shafts, a bracket and a solenoid having a moveable armature mounted on a fixed part of the machine, an arm linked to said bracket and armature, a pulley rotatably mountedon said bracket, a belt having a resilient portion, positioned over and with its strands depending from the pulley shaft between the first pair of pintles; the end of one strand being fixed to the bracket; the other strand passing under and contacting the pulley and its end being secured to the linked arm associated with the solenoid; the strands not being connected to each other at their lower ends, a circuit adapted to actuate the solenoid, comprising said solenoid, a switch and a source of electrical energy, whereby upon actuation of the solenoid, the pulley shaft will be rotated in one direction, and upon the opening of the solenoid circuit, the return of the stressed resilient portion of the second belt to unstressed condition, the shafts will be rotated in reverse direction, means to vibrate each marking stylus hold' er, carried on the beam; said vibrating means including an electro-magnet and an electrical circuit including said magnet, a switch and a supply of electrical energy, and an electrical circuit adapted for arcing to occur between each marking stylus and the article it contacts periodically upon vibratory movement of the holder; said arc ing means comprising a source of electrical energy connected to the marking stylus and said article to be marked; both the stylus and the article to be marked thereby being electrical son'- ductors; the vibrating means being independent of the means to raise and lower each marking stylus holder.

19. In a machine as defined in claim 8, including a bar extending rearwardly upwardly from the horizontally positioned frame, a counterweight carried on said bar, adapted to maintain the upright frame in raised position with respect to the :pattern plate when said upright frame is substantially raised from said pattern plate, and

not to effect the position of said upright frame 10

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