US2562269A - Copying machine for engraving jewelry rings - Google Patents

Description

July 3l, 95l c. G. c;RuE'rrr\1ERv E-r Al. 2,562,269

COPYING MACHINE FOR ENGRAVING JEWELRY RINGS 2 Sheets--Sheel'l l Filed May '7, 1947 a ge,

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July 31, 1951 G. G. GRUETTNER lawn. 2,562,269

COPYING MACHINE FOR ENGRAVING JEWELRY RINGS Filed May '7, 1947 2 Sheets-Sheet 2 l'lllllllllIlIIIlIllIlIIlllIlllkllllllllllllllll Patented July 31, '1951 COPYING MACHINE FOR ENGRAVING JEWELRY RINGS Gerhard Gustav Gruettner and Rudy Charles Stiefel, New York, N. Y., assignors, by mesne assignments, to lNew Hermes Ring Engraving Corp., New York, N. Y., a corporation of New York Application May 7, 1947, serial No. 746,508

:The object of our invention is a copying machine for engraving letters,'etc, into the inside of jewelry rings, such machine using a universally movable pantograph lever which carries a tracer ior the pattern at or near one end and an engraving tool near the other end.

The workpiece, i. e. the ring, is held in a rotatable chuck.

Means are provided for causing a relative motion of approach and removal between said tool and said chuck to cause o-r interrupt engagement of said tool and said ring.

Means are also provided for indexing said chuck to secure the desired spacing between individual letters.

It is an object of our invention to construct such a machine in such a way that it can be reliably operated by unskilled workers.

With this aim in View it is particularly an object of our invention to make provisions for automatically actuating said indexing means during actuation of said relative motion means. Thus a reliableautomatic letter spacing is secured and spoiling of workpieces by careless or unskilled workers is avoided.

Other features and advantages of our invention will become apparent from the following specification in connection with the accompanying drawings showing a preferred embodiment of our invention by way of example.

In the drawings is:

Figure 1 a iront View of the machine with parts broken away to show details;

Figure 2 a side view of Figure l;

Figure 3 is a perspective View of part of the machine on a larger scale at the end of the letter spacing operation;

Figure 4 a front elevation of the chuck and indexing means at the beginning rof the letter spacing operation;

Figure' 5 a side view of part of the drive for the chuck means shown in Figure 4; y

Figure 6 a side view of the chuck means shown in Figure 4, the indexing means being omitted;

Figure '7 a front view of the drive for the chuck jaws, one jaw only being shown;

Figure 8 a section of the line 8-8 of Figure 7.

In the upright frame or stand I the panto-l graph lever 2 is mounted for universal swinging motion by means of the axles 3 and 4 at right angles to one another.

7 Claims. (Cl. 33-24) This lever hasv substantially the form of the letter` E', having on its body an upper substantially horizontal arm 5 lreceiving said axles, therebeneath a second arm E carrying the'engraving tool 1 and, on the lower end, a third arm 3 carrying the tracer or stylus 9.

The point of the tool 1, which is not rotated for cutting but acts as an engraving needle, has the known form of a pyramid with three or more sides thus presenting cutting breasts all around to the workpiece.

The tracer 9 is slightly movable vertically in the arm 8 for permitting engagement-of the tracer with and disengagement from the pattern letter I 0 of the alphabet out o-r engraved into Y the pattern carrier II.

The workpiece, i. e. the ring I2 is held clamped by chuck means, to be described later more detailedly, on a plate or side I3 slidable vertically in guide grooves I4 of the frame I.

Here it is sulcient to say that the ring is held by three chuck jaws I5.

For moving the slide I3 up and down a con.- trol lever I 6 provided with a handleor nger piece II is swingable with its axle or shaft I8 which is mounted in the frame I. The lever .I6 is a bell crank lever having a lateral arm I9. Through this arm extends a reduced end part 20 of a connecting rod or pitman 2l. Between a shoulder 22 of the pitman and the arm I9 a coil spring or compression spring 23 is interposed so as to apply resilient pressure to the work to be engraved.

The upper end of the pitman 2| engages a pin 24 on the outer end yof an elbow lever consisting of the arms 25 and 26 and swingable on the pivot 21 on the slide I3.

The jaws I5 arel mounted on slides 28 slidable in radial slots 29 of a ratchet wheel 30. Each slide 28 has a pin 3| directed into sliding engagement with a spiral groove 32 cut into a gear wheel 33.

Gear wheel 33 is rotatable relatively to the ratchet-wheel by means of a knob 34 and intermediate gear wheel 35 meshing with said gear wheel 33.

Clockwise movement of gear wheel 33 moves the jaws inward along the ratchet-wheel 30 to clamp the ring I2.

The ratchet-wheel 30 with the chuck comprisingthe jaws I5 and assembly therefor and ring I2 indexible. for letter spacing, ,by means,

of a pawl 3B swingable on a pivot 3l of the lever arm 26 and urged by a spring (not shown) to engagement with the ratchet.

The idle counter-clockwise stroke of the pawl 36 is limited by one of three stepped shoulders 38, 39, 4B of an abutment lever 4I adjustable around a pivot d2 on the slide I3 for predetermining the amount-of letter` spacing. The lever 4I is adjusted by means of knob 43 (Figure 3) and is held in adjusted position by a spring pawl 44 engaging into teeth 45 of the lever 4l. As shown in Figures 3 and 4 the shoulder 4l] for the largest letter spacing is active. s

Upon depression of the handle I'I andv lever IB by the left hand of the operator pitman 2| rises and turns elbow lever 25, -26 clockwise.

Thereby the ratchet wheel-3U -with'the ring I2 are indexed an amount corresponding to the desired letter spacing.

A spring pawl 6 prevents backward rotation of the ratchet-wheel 39.

A stationary stop 4l on the slide I3 arrests the clockwise movement,` of the pawl 35 and presses the pa-wl firmly into the teeth of the ratchet. Hence continued depression of the handle Il lifts the slide I3 bodily relatively to guides I4 and presses the inside of the ring I2 carried bythe jaws I5 against the point of the tool 1 carried by the arm 6.

The operator then grasps with his right hand the knob 48 of the tracer and traces the desired pattern letter.

This letter is engraved on a reduced scale into the ring I2 by the tool l.

The pattern carrier IIv is a disk indexible around a stationary pivot 49 and provided with a detent notch 5l! opposite each letter of the alphabet. A slidable lock 5I (Figure 3) is provided for locking the pattern carrier II in the indexed position for the letter to be engraved and has a slot 5I() by means of which'it is guided on a stationary pin 5I I. yA coil spring 52 pulls the pointed end 53 of the lock 5l intoengagement with the detent notch 5t at the selected position of the pattern carrier II thus holding the latter locked during engraving. -When, however, the lever I and shaft I3 swing back counterclockwise as viewed in Figure 3 a pin 54 of the shaft IB strikes a nose 55 of the lock 5I and withdraws the point 53 from the notch 55. In this condition the disk EI can be freely rotated for indexing to the desired letter.

From the above it will be seen that the lever I6 has three important functions viz.:

1. Indexing the ring for letter spacing; A

2. Moving the ring into engagement with the tool; y

3. Controlling the locking of the pattern carrier.

As shown in Figure Il at least one of the jaws I5 has at least two ofits sides provided with differently shaped recesses or faces. One side, e. g., has a flat face 55', the next side has a slightly curved, concave recess 55, the next has an angular recess 5'I, and the next a curved recess 58 of a smaller radius than the other curved recess. The jaws can be turned around pivots 59 for bringing any of these sides inwards to face the ring I2, thus making possible the firm clamping of rings of many different regular and irregular sizes and shapes.

What we claim is:

1. A copying engraving machine for jewelry rings comprising, in combination, a frame, al

pantograph lever mounted universally-movable on said frame, a tracer tool holder mounted on said lever near the free end thereof, an engraving tool holder mounted on said lever near the other end thereof, a pattern carrier located near said tracer, a ring holding chuck mounted on said frame, means for peripherally indexing said chuck, means for causing a relative motion of approach and removal between said tool and `said chuck, andsingle control means for actuating said iirst mentioned means and said second mentioned means successively.

2. A machine as claimed in claim 1 in which the pattern carrier is indexible, a lock is provided for locking said carrier in its indexed position, and said control means is a control lever mounted on said frame which is combined with means for controlling in addition to said means for relative motion and said indexing means of the chuck, a tilting member for the operation of said lock.

3. A machine as claimed in claim l in which said chuck has jaws at least one of which is rotatably adjustable around an axis parallel to the axis of the chuck and has at least two diierently radially dimensioned sides for accommodat-A ing differently shaped rings by rotationally positioning at least one of said jaws.

d. A copying engraving machine for engraving rings comprising, in combination, a standard, a base for said standard, a pendulum lever having a universal pivotal support extending from the upper portion of said standard to adjacent the base, an arm for holding an engraving tool adjacent the upper support for said lever, means for holding a tracing tool adjacent the lower end cf said lever for tracing from the pattern supported adjacent the base whereby a magnied, movement of the tracing arm will move the engraving tool within limits of the ring to be engraved, a slide on said standard slidable vertically of the standard, a chuck rotatably mounted on said slide, indexing means for said chuck, a connector link for said slide to move said chuck and engraving tool relative to each other and a single control lever for operating said slide and indexing means for said chuck.

5. A copying engraving machine for engraving rings comprising, in combination, a standard, a

. jacent the upper support for said lever, means chuck being mounted on said ratchet wheel for for holding a tracing tool adjacent the lower end of said lever for tracing from the pattern supported adjacent the base whereby a magnified movement of the tracing arm wil1 move the engraving tool within limits of the ring to be engraved, a slide on said standard slidable vertically of the standard, a chuck on said slide, indexing means for said chuck, a connector link for said slide to move said chuck and engraving tool relatively to each other and a single control lever for operating said slide and indexing means for said chuck, a pattern carrier on said base, detent means for said pattern carrier and detent control means operable by said single means.

6. A machine as claimed in claim 1 in which a slide is slidably mounted on said frame, a ratchet wheel is rotatably mounted on said slide, said movement therewith, in which a pawl is mounted on said slide in peripheral engagement with said ratchet wheel, and in which said control meansy includes a control lever mounted on the frame and having a connection to said pawl, said pawl being adapted to index said ratchet wheel during the first part of the movement of said conu trol lever, and a stop is mounted on said slide and adapted to arrest the indexing movement of said pawl and to press the latter firmly against said ratchet Wheel and thereby cause said relative motion by the second part of said movement.

'7. A copying engraving machine for engraving on the interior surface of rings comprising, in combination, a frame, a pendulum lever having a universal pivotal support thereon, an arm for holding an engraving tool and an arm for tracing, each of which arms is mounted on said lever whereby a movement of the tracing arm will move the arm for the engraving tool within limits of the ring, a ring holding chuck within which said tool holding arm may be moved, a slide for said chuck slidable on said frame, indexing means for said chuck on said slide, and a single control lever having a connection to said slide to move it to and from the tool holding arm in one range of movement and to index said chuck in another range of movement.

GERHARD GUSTAV GRUETTNER. RUDY CHARLES STIEFEL.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS

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