US636915A - Automatic milling-machine. - Google Patents

Description

No. 636,9l5. Patented Nov. l4, I899.

0. MEHGENTHALER.

AUTOMATIC MILLING MACHINE.

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N0. 636,9I5. Patented Nov. [4, I899.

I 0. MERGENTHALER.

AUTOMATIC MILLING MACHINE.

(Application filed May 11, 1898.) (No Model.) 3 Sheets8heet 3.

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will be presently described.

UNITED STATES PATENT FFIGE.

OTTMAR MERGENTHALER, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE OTT. MERGENTI-IALER COMPANY, OF SAME PLACE.

AUTOMATIC MILLING-MACHINE.

sPEoIFicATIoN forming part of Letters Patent No. 636,91 5, dated November 14,- uses.

Application filed May 11, 1398.

To all whom it may concern.-

Be it known that I, OTTMAR MERGENTHA- LER, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and. useful Improvements in Automatic Milling-Machines, of which the following is a specification.

My invention relates to automatic millingmachines, and more particularly to that class of milling-machines wherein the blanks to be operated upon are stored in a magazine, from which they are fed in a series or gang to be operated upon by the cutter or cutters.

Although it will be understood that my improved machine is capable of general application wherever it may be desired to operate upon a series of blanks, it is shown and described herein as employedin connection with the manufacture of matrices for use in linotype-machinessuch, for example, as those shown and described in Letters Patent of .the

United States Nos. 436,531 and 436,532, granted to me on the 16th day of September, 1890.

My invention relates,.first, to the construction and arrangement of a magazine or holder in which the work or blanks maybe stored in series or gangs and from which they may be moved in series or gangs into relation with the cutting mechanism and in the further provision of a second holder or magazine adapted to receive the work or blanks after they have been operated upon, together with suitable shifting means for said holders or magazines, and, second, to the construction and arrangement of feeding devices whereby the work or blanks are first removed from the magazine and then pressure applied to them while they are being operated upon by the cutting mechanism, and,finally,whereby they are delivered in the second magazine or holder.

To these ends my invention consists in the construction and combination of parts which Referring to the drawings, Figure 1 is a top plan view of my improved milling-machine. Fig. 2 is a side view of the machine, partly broken away and partly in section, on the line 2 2 in Fig. 1. Fig. 3 is an end View of my machine, partly in section, on their regular section-line 3 .3 in Fig. 2. Fig. 4 is a dia-= Serial No. 680,400. (No model.)

grammatic view of a blank which may be op erated upon in my improved machine.

The framework A is or may be of any desired character, provided only that it has suf-- I number of transverse pockets B, in which the blanks are stored in gangs or series. Similarly the magazine 0 is adapted to slide in the guideway A and is also provided with a se= ries of transverse pockets 0, in which the finished blanks are received after they have been acted upon by the cutting mechanism. It will be seen from an inspection of Fig. 2 that the guideway A is located in the frame A at a lower level than the guideway A, and that consequently the upper surface of the magazine or holder 0 is located below the path pursued by the gang of blanks X after they have been acted upon by the cutting mechanism in such manner that when the gang of blanks is relieved from the pressure of the feeding devices it will drop into the pocket of the.magazine 0 below it. This positionof the magazine C permits of its ready removal from the machine at any period of the operation, as it is not in engagement with the clamping jaw or piece L, hereinafter to be described, and further secures the quick disengagement of the gang of blanks from the feeding and clamping devices. for imparting a step-by-step movement to the magazines or holders B and C will be hereinafter described.

Power is imparted to the machine by the fast and loose pulleys F from any suitable source of power. upon the driving-shaft F, suitably journaled in the frame of the machine and carrying the band-pulley F and the worm F The worm F meshes into and turns the worm-gear F fast upon the counter-shaft F and imparts The means The pulleys F are located continuous motion thereto. The countershaft F is suitably journaled in the frame of the machine and has fast thereon a second worm F which meshes into and turns the worm-gear G, imparting continuous motion thereto. The worm-gear G is fast upon the cam-shaft H, which is suitably journaled in the frame of the machine and which carries the feeding and clamping cams H and H hereinafter to be described.

The magazine B is provided at its lower surface with the ratchet-teeth B Mounted in the frame A of the machine is the rockshaft D, having fast upon it the roller-arm D so located that it is acted upon by the stud G, carried by the worm-gear G at each rotation of the cam-shaft II, thereby effecting the rocking of the shaft D. The rock-shaft D also carries a weighted arm D which restores the rock-shaft to its normal position. Also fast upon the rock-shaft D is the arm D, which carries at its outer end the spring-pressed pawl D so located as to engage with the ratchet-teeth B on the magazine B in such manner that the actuation of the rock-shaft D efiect-s the longitudinal movement of the magazine B, the ratchet-teeth B thereon being so located that the magazine 13 is moved a distance of one pocket for each rotation of the shaft H. Attached to the magazine 13 and passing over a roller 13 on the frame A is the cord 13, attached to the weight B in such manner that the tendency of the weight is to oppose the forward step-by-step action previously described. A spring-pressed pawl D attached to the frame of the machine and also engaging with the ratchet-teeth B prevents the backward movement of the magazine B. A cord D, attached to the spring-pressed pawls D and D affords a convenient means for retracting these pawls from engagement with the ratchet-teeth B and permits the return of the magazine B by its connection to the weight 13 and its readjustment. The magazine or holder C is similarly actuated and given a step-by-step movement by means of the arm E, fast on the rock-shaft D and provided with the spring-pressed pawl E, which engages with the ratchet-teeth 0 formed at the bottom of the magazine or holder C, as clearly shown in dotted lines in Fig. A spring-pressed retaining-pawl E is also provided for the ratchet-teeth C and similarly a cord C is attached to the magazine 0 and passes over a pulley C to a weight. It will be seen that by the mechanism just described a step-by-step movement equal in extent to the width of one of the pockets will be imparted to both magazines B and C at each movement of the rook-shaft D, the parts being so arranged that at the proper time a fresh gang or series of matrices in the magazine B is brought into position to be acted upon by the feeding devices and an empty pocket 0 brought into position to receive the gang of blanks after they have been operated on.

The arrangement and means for actuating the cutting mechanism are or may be as follows: Motion is imparted from the band-pulley F previously referred to, by means of the belt I, to the band-pulley 1, fast upon the horizontal spindle I suitably journaled in the frame of the machine and carrying at its inner end the face-cutter1 If it be desired to employ instead of a face-cutter an edge-cutter, the parts are arranged as shown in dotted lines in the various figures. A band-pulley J is made fast to the spindle 1 which is rotated by the means just described, and from the band-pulley J a belt J passes up and over the guide-pulleys J around the horizontal band-pulley J which is fast upon the Vertical arbor J, on which an edge-cutter may be mounted in the well-known manner to act as desired upon the series of blanks.

The feeding and clamping devices are arranged and constructed in the following manner: The jaw or feed-piece K is arranged to slide in the guideway A on the frame A in such manner that it registers with and passes through one of the pockets B of the magazine orholder B. Similarly the jaw orclamping-piece L is arranged to slide in the guideway A on the frame A in such manner that it coincides with and is adapted to pass through one of the pockets 0 of the magazine or holder C. The proper motion is imparted to the jaworfeed-piece K by the lever K, which is pivoted at K in the frame A and connected to the feed-piece K by the engagement of the pin K with the slot K formed in the end of the lever. The lower end of the lever K is provided with a weight K, the normal tendencyof which is to move the lever K inward, and with it the feed-piece K. This action of the weigbtK is, however, resisted and controlled by the action of the cam H previously referred to, which acts upon the roller K of the lever K. Similarly the jaw or clamping-piece L is moved by the lever L, which is pivoted at L to the frame of the machine and is connected to the clampingpiece L by the slot L The innerend of the lever L is provided with the weight L, the tendency of which is to move the clamping-piece L inwardly. This tendency of the weight L is, however, resisted and controlled by the cam ll, previously referred to, which acts upon the roller L on the lever L.

The shaping and relative timing of the two cams H and 11 substantially effects the following operation of the feed-piece K and clamping-piece L in the rotation of the camshaft H: lVhen the projection 11 of the cam H acts upon the roller K of the lever K, the jaw or feed-piece K will be retracted to its extreme outward position, at which time the shifting of the magazine B is effected by the mechanism already described. As the cam turns farther and moves the projection H out of relation with the roller K the weight K effects the inward movement of the feedpiece K in such manner as to shift the gang of ese,915

matrices Xfrom the pocket into the guideway A where it is clamped and held by the jaw or clamping-piece L, in connection with the jaw or feed-piece K. Similarly the clamping-piece L is .given its extreme outward position by the engagement of the piece H on the cam H with the roller L on the lever L, and during this interval the magazine 0 is shifted the distanceof'one pocket, in the manner previously described.- As the cam-shaft H turns farther the roller L will pass over the pro jection 1-1 of the cam H, and the weight L will cause the extreme inward movement of the clamping-piece L, through the pocket 0 of the magazine 0, in to position to meet the gang of blanks X and to firmly clamp them between the clamping-piece L and the feedpiece K. In this position of the feed-piece K and clamping-piece L both of the pieces are pressed inwardly by the weights K andL and serve to firmly clamp and hold the matrices bylateral pressure during their passage by and in relation to the cutting mechanism. After the gang of blanks has been clamped in the manner just described the further action of feeding the blanks past the cutting mechanism is accomplished as follows: The periphery of the cam H is so shaped that from this point onward it serves to steadily retract the clamping-piece L, and similarly the periphery of the cam H is so shaped that'during this operation the weight K is permitted to move the lever K and advance the feed-piece K, thereby always maintaining the pressure of the feed-piece K upon the gang of blanks as they are fed by the cutting mechanism. This shapingand relative arrangement of the cams is clearly shown in Fig. 2, wherein it will be seen that during this operation the roller K is not in contact with theperiphery of the cam H the cams H and H rotating in the direction of the arrow. When the gang of blanks has been carried by the cutting mechanism and is brought immediately over the pocket 0 in the magazine or holder 0, the piece H of the cam H, acting upon the roller L and the piece H of the cam H acting on the roller K relieves the pressure of the two jaws on the gang of blanks and permits them to drop into a pocket 0, and at the same time the clampingpiece Land the feed-piece K are returned to their outermost positions, as previously described,and the parts are in position for a fresh operation. It will be apparent that as a result of the operation just described the blanks are -discharged from the magazine without being pressed or confined therein and that they are subjected to pressure subsequently and before they reach the cutting mechanism.

Itis sometimes desirable to remove the magazine or holder 0 from the machine even durpreviously described, below the clampingpiece L in the guideway A in which it may be moved, when it is desired, simply by the disengagement of the pawls E and E previously described. It will be seen that the magazine B may be longitudinally shifted when the jaw or feed-piece K is in its extreme outermost position and not in engagement with one of the pockets B. To effect the longitudinal movement ofeitherof the magazines or holders, all that is necessary is the disengagement of the pawls previously described, when the weights B will act to move the magazine longitudinally.

Having now described the construction and arrangement of the different parts, their operation will be understood to proceed in the following manner: Assuming, for example, that it is desired to act upon blanks X, as shown in Fig. 4, and to remove therefrom the bur or projection X, these blanks may be stored in gangs or series in the pockets B of the magazine B, which is then set, in the manner previously described, so as to bring the first pocket B in registration with the guideway A At the same time the magazine 0 is set so as to bring its first pocket 0 in similar position. The machine is then started, and the feed-piece K will act to move the gang of blanks X from the pocket 13 into the guideway A wherein the blanks are seized and tightly clamped between the feed-piece K and the clamping-piece L in the manner previously described. As the cam-shaft H continues its rotation the cams H and H and the weights L and K efiect the shifting of the gang of blanks past the cutter 1 which removes from the blanks X the bur or fin X, in the manner clearly shown in Fig. 1. When the gang of blanks has been brought into position over the pocket 0, the pressure of the jaws L and K is relieved and the blanks drop into the pocket. The clamping-pieceL and the feed-piece K then resume their extreme outward positions, at which time the holders or magazines B and O are each shifted the space of one pocket by the pawl-andratchet teeth mechanism previously described, when the operation may be repeated as before. It will be understood that if it is desired to cut into the work with an edgecutter instead of a face-cutter the face-cutter may be applied to the vertical spindle J (shown in dotted lines,) the other operations of shifting the mechanism and feeding and clamping the work being the same in both instances.

Although I have shown and described a specific form of mechanism, it will be understood that many changes maybe made therein without departing from the spirit of my invention. Thus, for example, mechanical equivalents may be substituted, such as the provision of springs in place of the weights herein employed. The character, number, and location of the cutters may be varied and other changes made, which would still be comprised within the scope of my invention.

4 acacia It will be further understood that the devices herein described may be employed in connection with single, pieces instead of blanks in series or gangs, and, in fact, to any work which may be grasped and held by the clamping-jaws.

Having described my invention, What I claim, and desire to secure by Letters Patent of the United States, is-

1. In a milling-machine, the combination with a suitably-actuated cutter, of two movable magazines or holders, one of which is adapted to hold the blanks to be acted upon, and the second of which is adapted to receive the blanks from the cutter, of mechanism for moving the magazines intermittently, and mechanism for feeding the blanks from one magazine to the cutter and to the other magazine.

2. In a milling-machine, the combination with a suitably-actuated cutter, of two substantially horizontal guideways, magazines adapted to slide in said guideways, means for intermittently moving said magazines, and means for carrying blanks from one of said magazines to the cutter and delivering said. blanks to the other magazine.

3. In a milling-machine, the combination with a suitably-actuated cutter, of two parallel guideways, and a third guideway at right angles thereto, magazines arranged to slide in said parallel guideways, and a slide in said rightangled guideway adapted to carry blanks from one of said magazines past the cutter to the other magazine.

4:. In a milling-machine, the combination with two guideways, a magazine provided with compartments sliding in each guideway, means for normally urging said magazines in one direction, means for giving said magazines a step-by-step movement in the opposite direction, a milling-cutter, and means for moving blanks from one of said magazines to the cutter and delivering them to the other magazine.

5. In a milling-machine, the combination with a suitably-actuated cutter and a guideway adjacent thereto, of two clamping-jaws sliding in said guideway, means for operating said jaws to yieldingly clamp a blank and simultaneously move said blank to the cutter, a magazine for blanks, and automatic means for delivering blanks from said magazine to said jaws.

6. In a milling-machine, the combination with two parallel guideways and magazines movable therein, of a transverse guideway, two clamping-jaws movable in said transverse guideway, a cutter adjacent to said guideway, and means for moving said jaws relatively to clamp and release the work and for moving said jaws simultaneously while the work is clamped to carry the same to the cutter.

7. In a milling-machine, the combination with a suitably-actuated cutter and a guideway for directing the work to said cutter, of two jaws sliding in said guideway, means for normally urging said jaws yieldingly toward each other to clamp the work, means for moving said jaws simultaneously to carry the work to the cutter while it is so clamped, a magazine for blanks, and automatic means for delivering blanks from said magazine to said jaws 8. In a milling-machine, the combination with a suitably-actuated cutter, and a guideway for directing the work to said cutter, of a feedingjaw sliding in said guideway, a horizontal magazine movable transversely to said guideway and in the same plane therewith, and a second horizontal magazine movable transversely to said guideway and arranged in a plane below said guideway, the said feeding jaw being adapted to move through the first-n amed magazine and to carry work from said magazine past the cutter and into position over said second magazine, sub stantially as described.

9. In a milling-machine, the combination with a suitably-actuated cutter, and a guideway for directing blanks thereto, of two magazines movable transversely to said guideway, two feeding-jaws in said guideway, levers for operating said jaws, cams for moving said jaws away from each other, and, means for yieldingly moving said jaws toward each other when the cams permit, said jaws being controlled by said operating means to yieldingly grasp the work, then carry it to the cutter and finally release the work, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

OTT. MERGENTI-IALER.

Witnesses:

WILLIAM H. BERRY, MURRAY HANSON.

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