US737387A - Apparatus for beveling glass. - Google Patents

Description

No. 737,387. PATENTED AUG. 25 1903.

G. L. GOEHRING & W. TROGHE.

APPARATUS FOR BBVELING GLASS.

APPLICATION FILED JUNE 7, 1902.

N0 MODEL. 12 SHEETS-SHEET 1.

No. 737,387. PATENTED-AUG. 25, 1903. O. L. GOEHRING & W. TROGHE. APPARATUS FOR BEVELING GLASS.

APPLICATION PIL'BD JUNE 7, 1902.

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No. 737,387. PATENTED AUG. 25, 1903. C. L. GOBHRING & W. TROCHE.

APPARATUS FOR BEVELING GLASS.

APPLIJATION FILED JUNE 7, 1902. no MODEL. 12 SHEETS-SHEET 3..

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No. 787,387. PATENTED AUG. 25, 1903. C. L. GOEHRING & W. TROGHE. APPARATUS FOR BEVELING GLASS.

APPLICATION FILED JUNE 7.1902.

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,387. PATBNTED AUG. 25, 1903. 0. L. GOEHRING & W. TROGHE. APPARATUS FOR BEVBLING GLASS.

APPLICATION IILED JUNE 7. 1902.

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whnemie. lvwaniom No. 737,387. PATEN'IED AUG. 25, 1903. G. L. GOEHRING & W. TROGHE. APPARATUS FOR BEVELING GLASS.

APPLICATION IILBD JUNE 7, 1902.

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PATENTED AUG. 25, 1903. G. L. GOEHRING & W. TROGHE.

APPARATUS FOR BEVELING' GLASS.

APPLIOATION FILED JUNE 7, 1902.

12 SHEETS-SHEET B.

N0 MODEL.

No. 737,387. PATENTED AUG. 25, 1903., G. L. GOEHRING & W. TROGHE. APPARATUS FOR BEVELING GLASS.

APPLICATION FILED JUNE 7, 1902. v 12 SHEETS-SHBET 9 N0 MODEL.

No. 737,387. PATENTED AUG. 25, 1903. G. L. GOEHRING & W. TROGHE.

APPARATUS FOR BEVELING GLASS.

APPLICATION FILED JUNE 7, 1902.7

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No. 737.387. PATENTED AUG. 25, 1903. G. L. GOEHRING& W. TROGHE. APPARATUS FOR BEVELING GLASS.

APPLICATION FILED JUNE 7. 1902.

N0 MODEL. 12 SHEETSSHEET 11.

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-No. 737,387. PATENTED AUG. 25 190 3.

G. L. GOEHRING & W. TROOHE.

APPARATUS FOR BEVBLING GLASS.

APPLICATION FILED JUNE 7. 1902. N0 MODEL.

12 SHEETS-SHEET 12.v

UNITED STATES Tatented August 25, 1903 "PATENT OFFICE.

CHARLES L. GOEHRING AND WILLIAM TROCHE, OF AKRON, OHIO; SAID TROOHE ASSIGNOR TO SAID GOEHRING.

APPARATUS FOR BEVELING GLASS;

$PECIFIOATION forming part of Letters Patent No. 737,387, dated 25, 1903. Application filed June 7, 1902. Serial No- 110.660. (No model.)

To (all whom it may concern:

Beitknown that we, CHARLES L. GOEHRING and WILLIAM TROOHE, both citizens of the United States,residing at Akron,in the county of Summit, State of- Ohio, have invented certain new and useful Improvements in Apparatus for Beveling Glass; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being bad to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in the art of glass-beveling, and the type of apparatus illustrated and described herein is designed particularly for beveling straight edges, although parts of the mechanism are well adapted for use in connection with apparatus for beveling round, oval, or curved edges, and hence in the following specification and claims, while we shall particularly refer to the first'mentioned type of apparatus, it will be understood that we do not wish to be limited thereto save where mechanism solely applicable to beveling straight edges is specifically designated in the claims.

The objects of the invention are to provide a mechanism which will be, so far as possible,

automatic in its action, rapid in operation,

capable of operating to successfully bevel glass of the most refractory character, and by a method of manipulation which will onable the glass not only to be ground but polished by the use of the same mechanical appliances and Without the removal of the glass from the apparatus.

With the above objects in view the apparatus which we employ and which is illustrated in the accompanying drawings may be said to comprehend a mechanism, as a rotary grinding-wheel, with a feed -mechanism for bringing the surface to be operated upon and wheel together with a difierential speedthat is to say, during the initial cutting the feed is more rapid than during the final or latter portion of the grinding operation. In the apparatus illustrated the feed-motion last referred to is secured by advancing the glass or surface being operated upon, the differential rate of advance being predetermined.

and automatically interrupted at the stage of completion, whereby the grinding-surface and glass or surface being operated upon are held against movement toward each other until an appreciable space is formed between said surfaces enabling the process of the present application to be carried into effect by the introduction between said surfaces of a fine abrading material which will be carried by the grindin -surface, but will give a finish to the surface being operated upon not obtainable by means of the grinding-surface alone.

The invention further contemplates the use of a grinding-wheel of a width or thickness equal to or greater than the length of the surface being operated upon and a mechanism for moving said grinding-wheel and surface being operated upon laterally with relation to each other, whereby whilethewhole length of said surface being operated upon is acted upon simultaneously a diagonal or rotary grinding efiect is secured which not only maintains the alinement of the grinding-surface, but prevents the formation of scratches orridges across the surface being acted upon, due to the repeated action of the same particle of grinding material, as would be the case were no lateral movement employed.

The invention furthercomprehends the employment of mechanism forimparting a transverse movement to the stone or grinding-surface or to the surface being operated upon, or both, together with certain novel details of construction and combinations and arrangements of parts, all as will be now described, and pointed out particularly in the appended claims.

Referring to the accompanying drawings, Figure 1 is a side elevation of a machine or apparatus constructed in accordance with the principles of our present invention, partss'of the mechanism being omitted to prevent obscurity and portions being broken away to show underlying parts.- Fig. 2 is a similar View looking at the front of the apparatus. Fig. 3 is a similar view looking at the opposite side of the machine from that illustrated in Fig. 1. Fig. 4 is a sectional view showing the driving mechanism for the work-feed in top plan. Fig. 5 is an elevation looking at the rear side of the machine and showing the .lock for the work-support.

side elevation, partially in section and corresponding to Fig. 1, showing the work-support and its adjustments on an enlarged scale. Fig. 9 is a front elevation corresponding to Fig. 8. Fig. 10 is a vertical section illustrating the manner of assembling the work-support. Fig. 11 is a top plan View of the mechanism illustrated in Figs. 8 and 9 with the tank or water-pan partially broken away to show the lock for the Work-support in top plan. Figs. 12, 13, and l t are details of the Fig. 15 is an enlarged elevation of the mechanism for effecting an adjustment of the extent of lateral movementof the work-support. Figs. 16,17, 18, 19, and 20 are details, on an enlarged scale, of the mechanism for efiecting the lateral movement of the grinding stone or wheel. Figs. 21 and 22 are an elevation and top plan view of a modified form of mechanism for effecting the difierential feed of the work-support toward the grinding-wheel.

Like letters of reference in the several figures indicate the same parts.

The main frame of the machine (lettered A in the accompanying drawings) is preferably of metal and of suitable shape to support the working mechanism of the whole apparatus. It is preferably substantially rectangular in cross-section, as indicated in Fig. 4, and at the bottom is provided with an extended base A and on the rear side near the top with a rearwardly-extending bracket A for supporting the bearings of the grindstone-frame, as will be presently described. said frame A is provided with ways or guides A extending vertically and adapted for cooperation With a vertically-sliding bracket B, which constitutes the base of the work-sup port and is moved vertically by means of a screw C, Fig. 2, held against longitudinal movement by bearings c on the main frame and adapted to be rotated by hand or power,

as will be presently explained.

The bracket D, in which the stone-frame E is directly pivoted, is adjustably mounted on the bracket A and is adapted to be adthe bracket D and having fast and loose pul leys E thereon, to which the driving-power is applied through a suitable belt or other power-transmitting mechanism and adapted to be thrown from one to the other of said pulleys by a belt-shifterE ,extending forward into a convenient position to be grasped by the attendant. The grindstone or abradingwheel F is mounted rigidly on a shaft F, carried in journals at the forward end of the frame E, and is preferably simply a rim of stone of awidth' equal to or greater than the At the front length of the edge to be beveled, said rim 'being supported by a central spider F to which it is secured by clamps or otherwise. The said stone is rotated by a driving-gear, preferably consisting of a pair of sprocketwheelsfe,mounted,respectively,on the shafts E and F and having sprocket-chains 6 con.- necting them, as illustrated clearlyin Figs. 1, 2, and 3.

To secure a transverse movement of the stone or a movement in the direction of the length of the shaft F, said shaft is mounted in bearings F Figs. 16 and 18. At one end said shaft is connected so as to rotate in, but moves longitudinally in unison with, a third bearing F which bearing F slides on a way F and is adapted to be moved so as to shift the shaft F and stone longitudinally or transversely to the direction of rotation of the stone by means of a crank or cam projection F on the forward end of a shaft F and adapted to cooperate with a slot or recess in a plate F secured to the rear face of the bearing F The shaft F extends rearwardly and at itsend is provided with a beveled gear E", which meshes with a'corresponding gear F on the shaft E. Thus by the rotation of the shaft E not only is the stone rotated; but it is also moved longitudinally of its axis, whereby it is given a diagonal or rotary cutting action instead of a straight grind.

To limit the downward movement ofthe frame E and stone, a limiting-bracket G extends upwardly from the frame A, and upon this limiting bracket a set screw G on the frame E is adapted to rest. Thus by adjusting the said set-screw G the downward limit of movement of the stone maybe gaged with the greatest accuracy.

In operation it is designed that the stone shall occupy a fixed position vertically, or, in other words, it does not ride on the work being done, but is held against vertical movement and the work is fed to the stone, and in order that the stone may be elevated to facilitate the application of the work or the changing of the position of the work the frame E is provided with a vertically-adjustable bracket G on the end or straight surface of which a roller or pair of rollers g, carried in the ends of crank-arms g, is or are adapted to work. Said crank-arms g are mounted on a transverse shaft or center g journaled on a bracket 9 of the main frame, and they are adapted to be turned to raise the stone and frame E, first, by means of a counterweight H, pivotally supported on the base of the machine and connected to one-of the crank-arms by a link h, and, secondly, by means of a link H, extending downwardly and connected at its lower end with a handle H projecting at the front of the machine in convenient reach of the attendant. The attendant may thus by it will be locked in that position. This result is attained by providing a second crank-arm H for operation by the handle H, which second crank-arm extends vertically and is provided at its upper end with a roller H adapted to take over a cam or curved surface H 011 the bracket G Thus when the outer end of the handle H is depressed and its inner end raised the first effect is to move the roller H away from over the bracket G2 and then to elevate the frame E through the medium of the roller g, which contacts with the bottom face of the bracket G In lowering the stone to Working position again the roller H is moved back over the top of the bracket G and locks the stone firmly in its adjusted position. The vertical adjustment of the bracket G is effected by means of a screw H (Shown clearly in Figs. 1 and 3.)

As before stated, the work is carried by the bracket B, which is vertically adjustable on the main frame, and in order to support said work in such manner that it may be moved horizontally in any direction independently of the bracket B said bracket is provided on its upper surface with a horizontal guide or way extending in a line from front to rear of the machine, and upon such guide or way is mounted an intermediate support B, which is adjustable from front to rear of the machine by means of a screw'shaft B Figs. 8 and 9, and in turn has upon its upper surface a transverse guide or way, upon which is mounted a transversely-movable intermemediate support B having at one side an extension b with which a power mechanism for moving said slide cooperates, as will presently appear. The intermediatesupport B has upon its upper surface a guide or way parallel with the guide or way on the bracket B, and upon this guide or way is mounted a turn-table support B, said support B being adapted to be adjusted by means of a rack and pinion B, Fig. 8. A rack and pinion is preferably .employed for this adjustment in order to secure a quick movement, which is desirable in shifting the work from one face to another, as will be readily understood. The turn-t-able support B is preferably provided with a central circular opening in which fits a downwardly-extending boss B of a turntable B", the said turn-table being held in place by a ring or disk secured within the support B by set-screws or other well-known devices, and said turn-table is provided with an upwardly-extending spindle B which constitutes the direct work-support. The work-- as, for instance, a glass plate, such as indicated at B --is clamped to the top of the spindle B by the usual clamp B and bears centrally on the top of the plate, thereby permitting the plate, with the turn-table or support, to be turned independently of the clamp.

Surrounding the work and preferably so located that the grinding'point will be lower than its upper edge is a tank or pan I, the said tank or pan being supported on the turn 'erated upon.

table; but the spindle B of the turn-table passes through astuffing-box I, Fig. 10,which will permit said turn-table to turn without turning the pan, although said pan partakes of the bodily movements of the turn-table in all directions.

The periphery of the turn-table is provided with notches b into which a locking-bolt b is adapted to pass for holding the turn-table against independent rotation, and said notches are located a distance apart corresponding to the angles of the work being op- The locking-bolt b is held in engagement by aspring b and is adapted to be retracted by a lever-handle b suitably pivoted on the support 11 and the arrangement is preferably such that when said bolt 1) is retracted it will be held retracted until the desired adjustment of the turn-table has been made or until the turn-table has moved so as to prevent said bolt again entering the same notch or locking-recess. To accomplish this result, a latch b Figs. 11 and 12, is pivoted to the support 12 and a spring b tends to throw said latch into a position to hold the lever b and bolt 12 retracted. Thus when the handleis moved back, so as to retract the bolt, said latch springs into position in front of the handle and prevents the rengagement of the I bolt. In order now to release the bolt and handle, the turn-table is provided with curved projections b Fig. 14, which, cooperating with the front end of the latch b elevates the same, depressing its rear end out of engagement with the handle and again freeing the bolt, permitting it to enter the next notch presented in proper position. This arrangement permits the operator to release the tu rntable andthen to use both hands in effecting the adjustment of the table, the lockbeing automatically released to reengage and arrest the table when in its proper adjustment for grinding the next face of the work. In effecting this adjustment the work may be quickly withdrawn from the proximity of the stone by means of the rack and pinion B and the stone itself may where so desired be raised to give further clearance for the corners of the work.

As before stated, there is a positive feeding motion for advancing the work to the stone or grinding-surface, and in the present apparatus this is effected by elevating the bracket B,which carries the entire work-support, and two mechanisms are provided for effecting this motion,the first being controlled by hand, so asto bring the work to its starting position, and the second being controlled automatically to advance the work with a relatively fast movement duringtheinitial grinding and with a gradually-decreasing speed as the point is approached where the grinding operation should cease, and finally said feeding motion is automatically arrested entirely at the proper point, which may be predetermined by the adjustment of the mechanism and the depth of bevel desired.

The feed is controlled through the screw 0, and the mechanism for driving this screw consists of a bevel-gear O on the lower end of the screw, a corresponding bevel-gear C mounted on a transverse shaft 0 but through which said shaft C may be moved longitudinally. The shaft carries at one end a hand-wheel C by means of which the shaft may be rotated to adjust the work by hand. At the opposite end of said shaft there is journaled a worm-wheel K, adapted to mesh with a worm K, carried by the shaft K having at its rear end a friction-disk K The connection between the worm-wheel K and shaft 0 is effected through the medium of a clutch 0 one section of which is connected with the worm-wheel K and the other section of which is mounted on the shaft 0 and the latter is movable longitudinally by means of a shifting-lever (J to throw said clutchsections into or out of engagement. At the rear of the machine a secondary drive-shaft L is journaled in suitable bearings and driven by means of a pulley Z, connected by a belt Z or otherwise with the main drive-shaft E, and upon this secondary drive-shaft L there is mounted a friction-wheel L, which is keyed to said shaft, so as to be capable of a movement longitudinally thereof, but is rotated in unison with said shaft and is adapted to contact with the face of the friction-disk K With such an arrangement it is obvious that 'central position toward the periphery of the friction-disk K said disk will be driven, but

with a gradually-decreasing speed-that is to say, when the friction-wheel has, in moving away from its central position reached a point where it will drive said disk the disk will be given a comparatively rapid rotation; but as the path of travel of the friction-Wheel becomes greater and greater the speed of rotation of the friction-disk is correspondingly reduced, but with a corresponding increase in the driving power of the wheel and disk.

As before stated, the invention comprehends the use of a mechanism which will feed the glass at a differential speed, and this difierential speed is secured through the mechanism just described, the friction-wheel being moved from a central position toward the periphery of the disk by a mechanism controlled by the elevating mechanism of the work-table or through a connection with the work table or support itself. Various forms .of mechanism for accomplishing this end may be employed, and. we have shown two such mechanisms, the first being shown in the general views of the machine and the second specifically in Figs. 21 and 22 of the drawings. The first of these mechanisms will be best understood by reference to Figs. 2 and 5.

raassr M, formed in two sections telescoping together and at the upper end pivoted in a bearing l which is vertically adjustable by means of a screw and hand-wheel M so as to vary the length of the lever-arm. Connected with the pivot or base of the lever-arm is a gear-wheel m (shown in dotted lines in Fig.-

5) and adapted to mesh with a rack M mounted on the rear ends of arms M Figs. 1 and 4, connected to and vertically adjustable with the bracket or work-support 13. With this arrangement the vertical movement of the work support elevates the rack and through the pinion m and lever-arm M correspondingly shifts the friction-wheel L toward 0 and upon which crank a scale for indicating the adjustment is preferably provided. The crank O is carried by a shaft 0 suitably journaled in bearings 0 attached to the main frame and at its forward end provided with a bevel gear-wheel 0 adapted to mesh with a corresponding gear-wheel 0 mounted on the end of the shaft 0 but held against longitudinal movement therewith by a clip or collar 0 The shaft 0 being the shaft through which the work-support is elevated, imparts a motion to the crank O exactly proportioned to the elevation of the work-support, and said crank 0 through the link 0 moves the friction-wheel correspondingly and gives the desired differential rate of feed to the work-support, whereby during the initial grinding or when a rough cut may be made and the material of the work removed very rapidly because of the narrowness of the edge, causing said work-support to move upward quickly, and as the width of the cut increases and it becomes desirable to make a more finished surface the work is fed much slower until as the point of completion is reached the feed is automatically arrested by a mechanism to be now described.

While the feed may be arrested by shifting the driving-gear at a number of different points, it is found most convenient to do this work by simply separating the friction-wheel and friction-disk. For this purpose the friction-disk and its shaft are preferably mounted to have a slight longitudinal movement, and they are adapted to be held up to their work bya spring P, Fig. 6, which cooperates with a collar 13, working between the collar 19 on the shaft K which carries the frictiondisk. Thus when said spring is under tension the disk will be held forward against the friction-wheel L; but if the tension of the spring is relieved the disk and wheel will be separated slightly or the pressure between them be sufficiently relieved to arrest the further verges"? feed of the work-support. The spring is put under tension by means of a gate P pivoted to the main frame, Figs. 4 and 6, and having a set-screw P adapted to bear on the upper end of the spring P, said gate being held forward with the set-screw in contact with the spring by means of a knocker or dog P Fig. 7, which is thrown into position by a spring P whenever said gate is swung forwardly, so as to put the spring under tension. The gate is swung forwardly to put the spring under tension by means of a collar P, Fig. 4, contacting with an arm P on the gate, and said collar P is mounted on the shaft and preferably on one of the sections of the clutch C whereby whenever said shaft is moved longitudinally it will put the sections of the clutch into engagement, the gate will. be swung for' ward, the spring put under tension, and the friction-wheel and disk brought together and held by the dog or knocker P until said dog or knocker is released.

In the ordinary operation of the machine the shaft 0 makes but a partial rotation to feed the work, and hence it is a simpler matter to provide a projection on said shaft which at the proper instant will contact with the dog or knocker and release the gate, so

as to arrest the feed. In Figs. 4and 7 it will be seen that we have provided the shaft 0 with an adjustable collar P having a projec tion P on one side thereof which is adapted to contact with the front end of the dog or knocker, so as to 'release the gate. This collar P may be set at any desired angle with relation to the shaft 0 and thereby arrest the feed when the desired depth of cut or bevel has been made.

For reciprocating the intermediate support B together with the direct work-support and turn-table laterally in a horizontal line, we provide a lever Q, pivoted on a bracket Q, secured to the side of the vertically-movable bracket B. This lever Q at its upper end is rounded and adapted to fit between projections B on the intermediate support B Fig. 9, which projections B form a channel-way, which permits of the adjustment of the work-support backward and forward from front to rear of the machine without interfering with the operative connection of the lever Q. At its lower end the lever Q is connected by a link Q with a rotary crank Q connected with a worm-wheel Q the latter being driven by a worm Q on ashaft Q receiving its motion through a pulley-andbelt connection Q with the shaft L.

The connection between the end of the link Q and the crank Q is an adjustable connection which will enable the throw of the crank to be regulated, so as to vary the transverse movement of the work-support, and the arrangement is preferably such that this adjustment may be made while the machine is in operation and while the work-support is being moved. For this purpose a screw (1 extends longitudinally of the crank Q and the connection with the link Q is made through a block q, which is adjusted by turning the screw. The screw 11 carries a bevelgear (1 meshing with a corresponding bevelgear (1 on the forward end of the shaft (1 projecting centrally through the worm-wheel Q and, if desired, constituting the journal for said wheel. At its rear end the shaft g carries a gear-wheel g meshing with a corresponding gear (1 mounted on a shaft g extending to the front of the machine. and having a hand-wheel g applied thereto, all as shown clearly in Fig. 15. Obviously now by rotating the hand-wheel g the throw of the crank g may be regulated at will, and the distance the work -support travels transversely is correspondingly controlled.

In operation the attendant having placed the glass in position and adjusted the parts he first grasps the hand-wheel C and moves the work holder up into position for com-' mencing the grinding operation. Then or, if

desired, previous to so adjusting the work-.

holder, he shifts the belts by means of the belt-shifter E so as to inaugurate the movement of the machine from the driving-power.- By means of the lever (3 he moves the shaft C longitudinally toithrow the clutch-sections. G into engagement, and thereby starts the automatic feed of the work-holder, such move;

ment also turning the gate P and putting the spring P under tension to bring the fric tion-wheel and disk into operative engagement. By means of the hand-wheel (1 he ad justs the transverse movement of the worksupport,and the grinding operation progresses until the desired depth of bevel has been made, at which instant the throw-out or stop projection P on the shaft 0 comes in contact with the dog P and releases the spring P, throwing the friction-wheel and disk out of operative relation to arrest the forward feed movement of the work-support. The other movements of the machine continue, and the grinder or wheel operating on the surface of the bevel forms an appreciable space between said surface and the surface of the wheel. The grinding operations up to this point have been carried on beneath the surface of the water in the tank or pan, thereby insuring a perfect feed of the water to all of the grinding-surface, which, it will be remembered, extends throughout the entire length of the edge being operated upon at all times. The bevel having been thus formed, the water is drawn off to a point below the level of the bevel,and in order to finish said bevel or give it a polish pumice in the form of a paste is daubed on the wheel and the operation continued. Said pumice is by the action of the wheel carried into and through the space between the wheel and bevel and itself forms a grinding material of very fine quality,which gives to said bevel a finish heretofore unattainable save by an entirely separate anddistinct apparatus or grinding-surface, and thus by this manipulation a series of steps usually performed in the beveling of glass are entirely done away with and when the plate comes from the apparatus it is ready for the 1 tion to throwing said gate back and moving the friction-disk outof contact with the friction-wheel also shifts the shaft 0 longitudinally and disengages the clutch 0 thus leaving the parts in, their initial position and ready for a subsequent operation. The lowering of the Work-support throws the friction-wheel back to its central position with relation to the disk, and the attendant when he is ready to put a new piece of work in position finds the machine in proper adjustment.

We do not claim in this application, which is a continuation of application, Serial No. 48,342, filed February 21, 1901, broadly the grinding of glass under water, nor broadly mechanism for performing such work, these features, together with process claims and claims on other forms of mechanism, being made the subject-matter of contemporaneous applications, Serial No. 74,751, filed Septembet 9, 1901; Serial No. 57,455, filed April 25, 1901, renewed January 18, 1902; Serial Nos. 90,354 and 74,750, filed September 9, 1901, renewed May 28, 1902; Serial Nos. 109,321 and 110,659, filed June 7, 1902, and Serial No. 110,661, filed June 7, 1902.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In an apparatus for grinding glass, the combination of a rotary grinder, a work-support and mechanism for decreasing the distance between said parts at a differential rate of movement whereby the grinding action will be more rapid at the beginning than during the later stages of such operation, sub-.

stantially as set forth.

2. In an apparatus for grinding glass, the combination of a rotary grinder, a work-support and mechanism operative automatically to decrease the distance between said parts at a differential rate of movement whereby the grinding action will be more rapid at the beginning than during the later stages of such operation, substantially as set forth.

3. In a glass-grinding apparatus, the com-f bination of a rotary grinder, a glass-support, feed mechanism for decreasing the distance between the grinder and the glass-support and a trip for arresting the feed movement at a predetermined point, substantially as set forth.

4. ,In an apparatus for grinding glass, the combination of a rotary grinder having a width not less than the length of the surface to be ground, a work-support and feed mechanism for decreasing the distance between said work-support and grinder at a predeterforth.

5. In a glass beveling machine, the combination with a vertically-movable rotarygrinder, and a lock for holding said grinder against vertical movement, of a verticallymovable work-support and a power-driven differential driving mechanism for moving said work-support vertically at a graduallydecreasing speed; substantially as described.

6. In a glass-beveling machine, the combination with a rotary grinder mounted on a center to swing vertically an adjustable stop for limiting the downward swing of said grinder and an adjustable lock for holding said grinder against upward movement, of a work-support movable toward and from the grinder and a feeder mechanism for advancing said work-support; substantially as described.

7. In a glass-beveling machine, the combination with a rotary grinder, a work-support movable toward and from said grinder and a power-driven feeding mechanism for effecting such movement, of a driving mechanism for moving said grinder and work-support laterally parallel with the axis of the grinder with respect to each other; substantially as described.

8. In a glass-grinding machine, the combination of a rotary grinder, a work-support, a power-driven feed mechanism for moving one of said parts in relation to the other and a driving mechanism for moving one of said parts in a lateral direction parallel with the axis of the grinder, substantially as set forth.

9. In a glass -beveling machine, the combination with a rotarygrinder of a width not less than the length of the surface to be ground,means forholdingsaidgrinderagainst vertical movement and a vertically-movable work-support, of a driving mechanism for moving said work-support vertically and a trip for releasing said driving mechanism controlled by the vertical movement of the support; substantially as described. 10. In a glass-beveling machine, the combination with a rotarygrinder and a vertically-movable work-support, of a driving mechanism for moving said work-support vertically, embodying a trip for arresting the movement of said driving mechanism and a controlling projection moving in unison with the work-support for operating said trip to arrest the vertical movement of the work-support; substantially as described.

11. In a glass-beveling machine, the combination with a rotary grinder, a verticallymovable work-support and a driving mechanism for moving said work-support vertically and embodying a differential gearing, of a controlling mechanism for said differential gearing actuated by the vertical movebination with a rotary grinder and verticallymovable work-support, of a driving mechanism for moving said work-support vertically, embodying a friction-disk and bodily-movable friction-wheel for cooperating therewith and a controlling mechanism for said friction-wheel controlled by the vertical movement of the work-support; substantially as described.

13. In a glass-beveling machine, the combination with a work-support and means for moving said Work-support vertically, of a rotary grinder, driving mechanism for rotating said grinder and driving mechanism for reciprocatingsaid grinder bodily; substantially as described.

14. In a glass-beveling machine, the combination with a work-support and means for moving said work-support, of a rotary grinder, adriving mechanism for rotating said grinder and a driving mechanism for moving said grinder bodily longitudinally of its axis of ro tation; substantially as described.

15. In a glassbeveling machine the combination with a work-support and means for moving said work-support to adjust the work, of a rotary grinder having a width not less than the length of the surface to be ground, a driving mechanism for rotating said grinder and a driving mechanism for moving said grinder longitudinally of its axis of rotation; substantially as described.

16. In a glass-beveling machine, the combination with a work-support and means for moving said work-support to adjust the work, of a rotary grinder mounted in a verticallyswinging frame, a driving mechanism for rotating said grinderand adriving mechanism forreciprocating said grinder bodily in its supporting-frame; substantially as described.

17. In a glass-beveling machine, the combination with a Work-support and an adjusting mechanism for said worksupport, of a grinder mounted to rotate in a verticallyswinging frame and having a movement Iongitudinally of its axis ofrotation in said frame, a driving mechanism for rotating the grinder and a driving mechanism for moving the grinder bodily longitudinally of its axis of rotation; substantially as described.

18. In a glass-beveling machine, the com bination with a work-holder and mechanism for adjusting said work-holder, of a rotary grinder, a vertically-movable frame in which said grinder is journaled, a drive-shaft on which said frame pivots, a driving mechanism intermediate said drive-shaft and rotary grinder for rotating the latter and a secondary driving mechanism also operated from said drive-shaft formoving the rotary grinder longitudinally ofits axis of rotation; substantially as described.

19. In a glass-beveling machine, the combination with a work-support and means for adjusting said work support of a rotary grinder, a pivoted frame in which said grinder is mounted, driving mechanism for rotating said grinder, an adjustable stop for limiting the downward movement of the frame, an elevating mechanism for said frame and a lock controlled by said elevating mechanism for locking the frame in its operative position; substantially as described.

20. In a glass-beveling machine, the combination with a work-support,a rotary grinder and a pivoted frame in which said grinder is mounted, of an adjustable bracket on said frame having a locking-surface, an elevating mechanism and a lock cooperating with said bracket to either lock said frame down or release and elevate the same; substantially as described.

21. In a glass-beveling machine, the combination with a work-support,a rotary grinder and a pivoted frame in which said grinder is mounted, of an adjustable bracket connected with said frame and having a locking-surface, and an elevating mechanism embodying a lever provided with a roller for cooperation with said locking-surface and a lever provided with a roller for cooperation with said bracket for elevating the frame; substantially as described.

22. In a glass-beveling machine, the combination with a rotary grinder and a worksupport movable toward and from said grinder and a screw for moving said work-support, of a manually-controlled operating-shaft for rotating said screw, a power-operated driving mechanism and aclutch connection intermediate said manually-controlled shaft and power driving mechanism,whereby the worksupport may be first adjusted by hand and subsequently connected with the power-controlled driving mechanism for efiecting the feed automatically; substantially as described.

23.'In a glass-beveling machine, the combination with a rotary grinder, a verticallymovable work-support and a screw for moving said work-support vertically, of a shaft, gearing interposed between said shaft and screw, means forcontrolling said shaft manually, a power-driven driving mechanism, a clutch intermediate said shaft and power driving mechanism, a shifting-gear operated by the engagement of said clutch to render the power driving mechanism operative and a trip for releasing said shiftinggear controlled by the rotation of the shaft and movement of the work-support; substantially as described.

24:. In a glass-beveling machine, the combination with a grinderand a vertically-movable work-support, of a driving-gearing for moving said work-support vertically embodying afriction-disk and a friction-wheel movable transversely across said disk and a shifting mechanism for said friction-wheel embodying a controlling-arm and mechanism for moving said arm controlled by the vertical movement of the work-support; substantially as described.

25. In a glass-beveling machine, the com- IIO bination with a rotary-grinder, a vertically.- lnovable work-support and a driving mechanism for moving said work-support embody ing a friction-disk and a friction-wheel movable'transversely of said friction-disk, of a controlling mechanism for said friction-wheel operated by the vertical movement. of the work-holder and an adjusting mechanism for said friction -wheel-controlling mechanism whereby the proportionate movement of said friction-wheel may be varied; substantially as described.

26. In a glass-beveling machine, the com-- bination with a rotary grinder, verticallymovable work-support and a driving mechanism for moving said work-supportembodying a friction-disk and a friction-wheel movable transversely of said friction-disk, of an adjustable shifting mechanism for said friction-wheel controlled by the vertical movement of the work-support whereby the relative degree of movement of said friction-wheel may be varied; substantially as described.

27. In a glass-beveling machine, the combination with a rotary grinder, a transverselymovable work-support and mechanism for moving said work-support transversely across the face of the grinder, ofa water-tank carried by said work-support and having walls extending above the level of the grinding-point; substantially as described.

28. In a glass-beveling machine, the combination with a rotary grinder and a vertically and horizontally adjustable work-support, of a tank carried by saidwork-support and having its edges extended above the level of the grinding-point whereby the grinding operation may take place beneath the surface of the water, and driving mechanism for offecting the movement of the work-support and tank during the grinding operation; substantially as described.

29. In. a glass-beveling machine, the combination with a rotary grinder, a vertically and horizontally adjustable and rotary worksupport, of atank or pan carried by said worksupport and movable vertically and horizontally therewith and a stuffing-box for permitting said work-support to rotate independently of the tank or pan; substantially as described.

30. In a glass-beveling machine, the combination with a rotary grinder, a vertically- 'support mounted to reciprocate transversely of the grinding-surface and adjustable vertically with relation to said grinding-surface,

of a mechanism for reciprocating said worksupport transversely, embodying a lever mounted on a center movable vertically in unison with the work-support, a link connected with said lever, a drivin, mechanism and a crank driven by said drivingmechanism and with which the link is connected; substantially as described.

33. In a glass-beveling machine the combination with a rotary grinder, a horizontallyadjustable work-support mounted to reciprocate at right angles to its horizontal adjustment and transversely of the grinding-sur face and having projections forming a way at right angles to its line of reciprocation, of a driving mechanism for reciprocating said work-support having a lever working in said wayand means for oscillating said lever; substantially as described.

34. In a glass-beveling machine, the combination with a rotary grinder, and a rotatable work-support and a controlling mechanism for said work-support embodyinga turntable having positioning-notches therein, a spring-pressed bolt adapted to cooperate with said notches, a handle for operating said bolt, a catch for holding said belt out of its operative position anda projection on the turntable for releasing said catch to permit the bolt to become effective; substantially as described.

35. In an apparatus for grinding glass, the combination of a rotary grinder, a worksupport and mechanism for feeding the worksupport toward the grinder at a gradually-decreasing speed, substantially as set forth.

36. In an apparatus for grinding glass, the combination of a rotary grinder, a work-support, mechanism for feeding the work-support toward the grinderand means for varying the rate of feed, substantially as set forth.

CHARLES L. GOEHRING. WILLIAM TROOHE. Witnesses:

P. FANNY FALoR, H. S. FALOR.

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