US1302506A - Grinding-machine. - Google Patents

Description

L. N. BRUNER.

GRINDING MACHINE. APPLICATION, FILED Nov. 8. I9I6.

L32,5@,. Patented May 6, 1919.

5 SHEETS-SHEET L. N. BRUNER.

GRINDING MACHINE.

APPLICATION FILED NOV. 8. 1916.

Patented May 6, 1919.

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GRINDING MACHINE- APPLICATION man NOV- s. 1916.

Patented May 6, 1919.

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GRINDING MACHINE.

APPLICATION FILED NOV-'8. 1916. 1,302,506.,

Patented May 6, 1919.

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L. N. BRUNER.

GRINDING MACHINE.

APPLICATION FILED Nov. 8. 1916.

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GRINDING-MACHINE.

Specification of Letters Patent.

Patented May 6, 1919.

Application filed November 8, 1916. Serial No. 130,282.

To all whom it may concern:

Be it known that I, LOUIS NAGLEE BRUNER, a citizen of the United States of America, residing at 7 Bellerivestrasse, Zurich, Switzerland, glass manufacturer, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a specification.

This invention, which has reference to the grinding of glass articles and to analogous purposes, relates more particularly to the grinding or truing of the internal surfaces of glass caps for covering the mouths of bottles, jars and the like.

By means of the invent-ion a large quantity of glass caps can be produced all having exactly similar ground or trued surfaces, so that they are all interchangeable and will fit any one of a number of correspondingly ground bottles or jars.

A feature of the invention is that the various mechanical movements are controlled by suitable cams, so that practically all the attendant has to do is to keep the chute or hopper supplied with unground caps, the machine itself takin the cap from the chute or hop-per, placing it in the grinding position, causing the grinding or truing tool or diamond to act thereon and afterward withdrawing the ground or finished cap and ej ecting it from the machine, without the intervention of the attendant being required at any of these stages.

According to the invention, a revolving chuck arrangement is employed to hold the article during grinding, and a diamond or other grinding tool is arranged to be automatically inserted into the said article and traversed up and down or across the surface to be treated, until the latter is smooth and true and of the desired slope or inclination. After this the toolis automatically moved out of the way, ready for the next operation. The cap is fed into the chuck through an axial passage in the chuck spindle by a pusher rod which transfers it from a gap or recess in a rotary feed plate at one end of the chuck body, to the clamping jaws or holder at the other end thereof. The ground ca is also withdrawn axially through the hollbw body or spindle of the chuck and deposited again in the recess or gap of the rotary feed plate, which then turns sufiiciently to eject the ground stopper and bring a fresh one into the feed position after which the foregoing operations are repeated.

In order that the invention may be clearly understood and readily carried intoeifect reference will now be had to the accompanymg diagrammatic drawings in which:

1gure 1, is a vertical section of one example of the apparatus, showing one of the operative gro-u s or sections, two or more of which are usua ly combined in one machine.

Fig. 2, is a front elevation showing an arrangement in which five such groups or sets are combined, the positions of three toward the right (which are identical with the second one) being indicated by the vertical dotted lines.

Fig. 3, is a corresponding part plan view, certain elements being omitted for the sake of clearness.

Fig. 4, is a detail sectional view to a larger scale, of the chuck arrangement and pusher rod hereinafter referred to.

Fig. 5 is a plan of the chuck jaws.

Fig. 6 is a plan of a clutch device hereinafter described, taken on the line (3-6 of Fig. 1.

Fig. 7 is a detail plan of part of the grinder operating mechanism taken on the line 7-7 of Fig. 1.

Figs. 8 and 9 are details of cam mechanism respectively on the lines 8-8 and 99 of Fig. 1.

a is a small revoluble table, to which the caps b which are to be ground or trued, are fed by a chute 6 This table has two horseshoe shaped gaps or recesses a a in which the stopper rests, and which are diametrically opposite each other.

The parts are carried by a main framing A, having three shelf-like webs or ledges A A, A and comprise in the present example five distinct groups. The description of one group, as below will serve for the others equally.

The table a is arranged to make a half turn at each movement, so that it brings the gaps a a? alternately opposite the chute b 0 is a hollow chuck spindle (see Fig. 4)

which is carried in bearings c and beneath which the cap is brought bythe table a when the latter revolves. That is to say, when one gap (a comes opposite the feed chute, the other (a with a cap already therein, comes beneath the spindle.

(Z is a ram, plunger or pusher rod, which works up and-down in guides (Z 011 a vertical bracket A and is operated by a cam c keyed to shaft m through a lever The lower end of this lever is forked and engages a laterally grooved block 7 secured to rod (Z. The pusher (Z forces the cap Z) up to the top of the hollow spindle where it is gripped by the jaws ofa chuck (7. This pusher rod (Z has a cup shaped head (Z secured in a spring socket (l (Fig. c) at the top end thereof.

The top of the tubular spindle 0 carries the hollow chuckstem g which is split or divided by vertical and equidistant slots 9* into three; resilient fingers or prongs g each carrying one of thejaws g of the chuck (Fig. 5). This latter is opened and closed as required, Sliding cone or plug it which acts on a pair of crank-levers '11, the short ends 11 of .which depress the chuck slightly against the pressure of a spring 70. The jaws of the chuckfit in .a conical seating c at the top of the spindle 0.

After a cap is ground, the jaws are opened and allow it to drop into the dished top d of the ram cl, this topml having remained about half an inch below the cap during the grinding operation.

The aforesaid spindle 0 is driven (Fig. 1) by a pulley from another pulley g carried by a bracket A". There is one such pulley. tmounted on the spindle 9 behind each of the five groups or sections of the machine. T he belts of each two pulleys 9* pass-through suitable holes in the frame of the machine. The brackets A and pulleys g are omitted from Fig. 3, their arangement being no part of theinvention.

The plug or cone h and the jaws g of the chuck, are worked by a cam m fixed on the shaft m through aelever m pivoted at m and having a forked endm embracing the cone it.

:Thegrinding or truing tools 0 may be fitted with diamond grinding points. These diamondtools are all carried on a slide 0 dovetailedto work horizontally in a carrier 0 They are held off the work by a spring 0 acting on the slide 0 and are actuated partly by acam a, giving an up and down motion, and partly by a second cam 9 which presses them laterally against the work, and afterward moves them away therefrom, through a lever 79 suitably connected therewith.

It will be seen that the slide 0 is provided at its leftend (Figs. 2 and 3) with an inclinedfface 0 which is held by thespring 0 in contact with a correspondingly inclined faceoon the extremity p ofan arm 72 se curely fastened to the upper end of vertical shaft To the lower end of the shaft 71 is secured the said cam lever 22 which extends rearwardly and contacts with the cam ;a mounted to turn freely on the shaft m The carrier 0 has near each end, a downwardly extending piece or arm 0*", the end elements or groups of the machine being spaced out to allow room for them. These arms 0 form slides which work against ribs or dovetail guides 0* (Fig. 3) on the front face of the frame A, parallel with the inclined tool holders 0. The length of the slides 0 insures a steady and well-guided up and down inclined movement of the parts 0 0 The up and down movement is transmitted from the cam n, by a lever 11. on the shaft if, from which shaft short levers or fingers 07, extend toward the front of the machine and are coupled to the bottom end of each of the slides 0 as shown in Figs. 2 and 7.

Another cam or projection 79* mounted to turn on shaft m serves to control a clutch r on an adjoining spindle 9*.

The upper or sliding part of the clutch r splined on the spindleg and is worked by a fork 7 extending from a sleeve 1' on the cam shaft m The otherpart of this clutch carries a gear wheel 8 which is in engagement with a corresponding wheel .9 keyed on the cam spindle m The spindle 9* has secured to its lower end a worm wheel 9* which is driven by a worm 9 on the main power shaft of the machine, while a spur pinion Q1 is secured to its upper end and is constantly in mesh with va'spur gear 9 mounted to turnfreely on the shaft m The cams n, j) and 19*, also mounted to turn freely on the shaft m1, are securely united to rotate in nnisoniwith the gear 9 It may be here explained that n p and p move all the time while cams e andm (both driven by shaft m and wheels 8 onlyinake one turn at a time, to operate the chuck jaws g for holding the stopper, and also to operate the ram (Z.

When the cam 32* reaches the position shown in Fig. 1, it presses down the sleeve 7' and a recess r in a flange r thereon is moved away from a claw-pieee,nib or detent r carried by the gear wheel 8 The same downward movement causes the fork r to put the clutch a into engagement. The top part of the clutch has a sliding driving connection or key-way engagement with the spindle 9 and works the gear wheels .9 .8 and the latter makes one revolution until recess r .is'again opposite the nib or claw r whereupon a" can move up (due to a spring 1" inside it) and'the clutch 7 is raised by the arm or fork r andsordisengaged.

Thepinion g drivesthe wheel Q2 and the parts at 7! and p. The wedge-piece or projection 1 inthe position shown in Fig. 1, has engaged a corresponding edge piecer, so thrusting the part r downward. This action through the fork 1' puts the clutch r into engagement, so causing the gears s and s to rotate the spindle m3. Simultaneously, the hooked-over nib r clears the recess 1 and rides on to the top of the flange 0' on the sleeve 1. Hence the clutch cannot disengage until 8 and m have made a complete revolution, so as to bring r again opposite or over the recess a, at which time 72* has passed and cleared T The sleeve 7 is then pressed upward by the spring inside it, and the clutch r is opened. It will thus be seen from the foregoing description that the cams n, p and 71* with the spur-gear g are constantly rotating, whereas the spindle m (carrying the cams e, m and m is rotated by the gears 8, 8 only one revolution at a time, which occurs when the clutch r is in engagement.

Connected with and forming the top flange of the cam groove m (see Fig. 1) is a fiat or edge cam disk on, which through arms 25 t on a vertical shaft 23 operates a clutch (25 Fig. 2 for throwing the helical or skew gear a a (which operates the table a) in and out of action.

To make the cam arrangement more clear, eachone will now be briefly referred to separately with reference to the parts directly associated therewith.

The edge cam m works through t t t on to a clutch t which controls the part a of the gearing u a for operating the table or gap-disk a. The part a derives its motion through the clutch, from a shaft Z driven by a belt pulley Z The. cam in works the forked lever m which lifts and lowers the cone h for controlling the action of the chuck-j aws or grippers 9 (see Fig. 4).

The cam 79 works through 72 on to a crank-spindle p at the end of the machine, which carries an arm p This arm has an inclined or T-shaped extremity p engaging a corresponding inclined part 0 at the end of the slide 0 and serves to move the diamond or cutter on to or off the work, the inclines serving to facilitate adjustment.

The cam or works an arm n on a c 'ankspindle 11. which latter moves the carrier 0 of the tool-slide 0 up and down, through the parts a 0" as mentioned. The said cam a may have two, three or more lifts, according to the number of strokes to be given to the tool.

The cam 7) works against. a projection r" on the top edge of the non-rotating part 1 to put the clutch 0 into engagement. The part 9 is thrust upward again as stated by the coiled spring r inside it, when the clutch is to be released.

The cam flange 1 cooperates with. the V-shaped nib r to prevent the spring w mentioned in the last paragraph from thrusting up the part 7* until it and the cam-shaft m have made a complete revolution.

The cam (fast on m works the pusher rod (Z for inserting and reu'ioving the stoppers.

The mode of operation of the above described example of machine is as follows The main camshaft m is put into gear by the clutch r (for a single revolution at a time as just referred to) with the shaft 9* driven by the worm q and worm-wheel g arrangement 9. As the cam shaft begins to rotate, the cam m thereon opens the jaws at the top of the chuck-spindle, whereupon the cam e pulls down the pusher rod (Z.

This is possible on account of the slight movement of 1) relatively to r (owing to the reducing gear g 9 allowing the necessary time for m to complete a revolution, since it will be seen that m moves almost at the same speed as {1* and 1', whereas the parts 12. p 72* move much more slowly. An unground stopper then slips into one of the two gaps a (t in the feed-disk or table a, which latter is then caused by the edge cam m to make a half-revolution to bring such stopper over the head (Z of the pusher rod (Z. The said rod (Z is then raised by the cam e and carries the cam right to the top of the chuck socket and within range of the diamond cutter 0.

The cap is then gripped by the jaws 9 under the action of the cone it, the pusher rod head (l (which is non-rotary) being lowered a little to prevent its interfering with the revolution.

At this time, the cam spindle m has completed a revolution, and the nib 7' has come (as before referred to) over the recess W, the spring r being then able to thrust r upward so disengaging the clutch r and stopping the spindle m and the cam on and 6.

After this, the diamond is pressed against the work by the cam 79 and then the cam it causes it to perform its up and down stroke or strokes to true the surface of the cap, which is being now rotated rapidly by means of a belt pulley on the chuck-body or hollow spindle 0.

After the grinding is finished the proj ections 71* and 9 again put the clutch r into engagement and restart the spindle m The cam m then lowers the cone h and causes the grippers to release the ground cap, which drops into the still raised cup-shaped head (Z of the rod cl.

The cam a then lowers this red (Z until the cap again rests in the gap of the feed-disk or table a from which it was previously lifted, the rod (Z and its head 6Z continuing to descend into the still lower position shown. The cam m then puts the clutch at i into engagement and causes a to perform a halfrevolution this being insured in the known manner by a projection t and a recess 25 Which only permit the clutch to Open at the proper instant.

At this time the finished cap (whose shape is seen at the top of Fig. 4) is resting in and projecting a little above the gap a which is remote from the chute b see for instance the gap a in the third cable a from the-left of Fig. 3.

In the aforesaid half revolution therefore of the table a the finished cap is brought around into the right hand dotted position 6, (sec left end of Fig. 3), where it strikes at a slant against the outside of the wall of the chute mouth 6 and is thus wedged out of the gap (6 into any suitable receiver, as the table continues to rotate.

These operations are then repeated for the next cap, which however is now fed into the gap a such feeding-in occurring automatically since the caps slide, of themselves, from the chute 2) (into which a supply is placed) into the gaps a a alternately as the disk at revolves.

Five or more of these grinding or truing arrangements are mounted side by side as shown and all operated sin'mltaneously, which in some cases might be effected by one and the same set of cams. The diamond tools or the like are as stated all mounted on a single carrier bar or frame, and operated in unison.

Obviously the invention may be modified in various ways in carrying the same into effect without departing from the general nature thereof.

I claim:

1. In a machine for grinding glass articles and for analogous purposes, the combination of a revolving chuck, a hollow spindle therefor, means for inserting the articles one by one axially into said chuck from the opposite end of said spindle, and for removing them after the grinding, a nonrotary rinding tool, cam-controlled means for applying said tool to the work and for removing it therefrom, and a single spindle which carries all of the cams for operating the different parts of the machine, substantially as described.

2. In a machine for grinding glass articles and for analogous purposes, the combi nation of a chuck, a hollow spindle therefor, a pusher rod whereby thearticles are inserted and removed through the hollow spindle of said chuck, cams for controlling the chuck and the pusher rod, means whereby the said cams are brought to rest while the grinding operation isbeing performed, a non-rotar grinding tool, and means for traversing same up and down against the surface to be ground, substantially as described.

3. In a machine for grinding glass articles and for analogous purposes, the combination of a revolving chuck to hold the articles during grinding, a grinding tool to smooth the surface to be ground, a hollow spindle carrying said chuck, a pusher rod working to and fro in said hollowspindle, a head on said pusher rod to receive and hold the article before and after the grinding, a gapped feed-disk to receive the article and carry it opposite the pusher rod at one movement, and toreceive it back from the pusher rod on the return stroke of the latter, substantially as described.

at. In a machine for grinding glass articles and for analogous purposes, the combination of a revolving chuck to hold the articles during grinding, spring fingers carrying the jaws of said chuck, a grinding tool to smooth the surface to be ground, a carrier for said tool working on slides inclined to the axis of the chuck, a cam for working said grinding tool up and down, a hollow spindle carrying said chuck, a pusher rod working to and fro in said hollow spindle, a head on said pusher rod to receive and hold the article before and after the grinding, a gapped feed-disk to receive the article and carry it opposite the pusher rod at one movement, and to receive it back from the pusher rod on the return stroke of the latter, substantially as described.

In testimony whereof I have signed my name to this specification.

LOUIS NAGLEE BRUNER.

lVitnesses:

CHARLES E. TAYLER, LUCY OosTreAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, 1). 0.

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