US451303A - Eugene roman - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

B. HO MAN. BEVEL GRINDING MAGHINE FOR PLATE GLASS MANUFACTURE. No. 451,303.

Patented Apr. 28, 1891.

I I WITNESSES W -al$ ATTORNEYS 2 Sheets-Sheet 2.

(No Model.)

. E. HUMAN.

BEVEL GRINDING MACHINE FOR PLATE GLASS MANUFACTURE. No. 451 303.

Patented Apr. 28,1891.'

WITNESSES Nurse STATES PATENT EUGENE HOMAN, OF NElV YORK, N. Y.

SPECIFICATION forming part of Letters Patent N0. 451,303, dated April 28, 1891.

Application filed November '7, 1890. Serial No. 370,609. (No model.)

To all whom it may concern Be it known thatLEUGENE HOMAN,of New York, in the county and State of New York, have invented a new and useful Bevel-Grinding Machine for Plate-Glass Manufacture, of which the following is a full, clear, and exact description.

This invention relates to improvements in grinding-machines used to cut and polish bevel edges on rectangular plates of glass used for mirrors and other purposes, and has for its objects to provide a simple practical device which will afford means to produce bevel edges of any desired angle on glass plates and that will operate automatically after it is properly adjusted.

To these ends myinvention consists in certain features of construction and combinations of parts, as is hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters and numerals of reference indicate corresponding parts in all the figures.

Figure 1 is a front elevation of the machine,-

partly in section and broken away to expose interior features of construction. Fig. 2 is a transverse section taken on the line 2 2 in Fig. 1. Fig. 3 is a plan view of the device, taken on the line 3 3 in Fig. 2, one end portion being broken away. Fig. 4 is an enlarged sectional side elevation of a portion of the device, taken on the line 4 4 in Fig. 1, viewed in the direction of the arrow 4; and Fig. 5 is a front elevation, broken away and in section, of the parts shown in Fig. 4, taken on the line 5 5 in said figure.

A heavy strong frame, preferably made of metal, is provided for the support of other parts of the machine, and consists of two elongated parallel sides A, which are joined together at their ends by the legs B, which extend outwardly toward their bases at, so as to aiford a stable support for all parts above. The upper surfaces of the sides A are finished by machinery to render them level, and they are also trned upon their edges, which are preferably undercut to adapt them to receive and retain in sliding condition a carriage O,

which will be further described. The width of the legs B is so proportioned with regard to that of the shears A, by which term I prefer to designate the joined sides previously mentioned, that the standards D may be erected from the legsforwardly of the shears to sustain other parts, as will appear.

A preferably angle-iron skeleton table or platen E is furnished for the support of the material which is to be operated upon. Said platen, having a length and width proportioned to the desired capacity of the machine, is held at such end adj ustably in connection with the standards D by the device more clearly shown in Figs. 4 and 5. The suspending appliances for the platen E are similar at each end of the same. Hence a description of one will suffice for both, and, as represented, they consist of a flanged nut 17, which is bolted to a standard D, so that the engaged screw 0 will project forwardly and at a right angle to the front edge of the standard, having two radial collars 61 formed on it near the threaded portion of the bod y and a hand-wheel e affixed on its outer end. A bracketarm g is secured to the center bar and end piece of the platen E, as shown in Fig. 5, the projecting portion of which arm is journaled to receive and loosely support a pendent fork-piece h, that straddles the body of the screw 0 and is inserted between the collars d. It will be seen that the provision of the duplicate suspending devices for the platen E will, if these are located on the platen and standards D at directly opposite points a proper distance above the top face of the shears A, permit.

said platen to be adjusted at any desired angle from a perpendicular plane by an equal movement of the hand-wheels c on the screws 0 if the lower edge of the platen is held from a swinging movement.

A projecting ledge 'i is formedon or secured to the lower edge of the platen E, which extends forward sufficiently to afford a proper seat, whereon the plate of glass F is placed when its edges are to be beveled, the plate resting againstthe longitudinal bars of the platen, which when rearwardly inclined will sustain the plate with its lower forward edge or corner properly projected to allow the grinding and polishing device to have contact therewith, the weight of the thick plate F serving to retain it in position without clam ping, which, however, can be effected by the use of any suitable clamp applied to the plate and bars of the platen in an obvious manner.

The carriage 0, previously mentioned, is clipped at its edges to the undercut edges of the shears A, and has a depending nut 7c secured on its lower side, which is adapted to engage a driving-screw G, that extends longitudinally of the shears, is journ aled thereon at the ends of the shears, and projects at one end for the reception of three pulleys 1 2 3. The outer pulleys 1 3 are secured by any proper means 011 the projecting screw G, and the intermediate pulley 2 is left loose, the three pulleys having equal diameter and face width, as shown in Fig. 1.

Upon the terminal of the screw G, which extends outside of the pulley 3, a balancewheel H is mounted and affixed. Said Wheel having a heavy rim, is adapted to steady the movement of the machine and give sufficient momentum to the screw G to effect the shipping of the belts that drive it, and which will be further described.

On the carriage 0 two pedestal-boxes m are secured, which are transversely bored in axial alignment to receive a mandrel m, which is suitably journaled to have a revoluble engagement with said boxes, the body of the mandrel being extended forwardly a proper length to support the grinding-wheel I on its end in such a relative position that the inner vertical face of the wheel will lie in a plane close to the lower edge of the glass plate F when said plate is inclined to project its lower portion toward the grinding-wheel, as represented in Fig. 2.

Between the pedestal-boxesm a small bandpulley J is located on and adj ustably secured in any proper manner to the mandrel m, the pulley named serving to receive and transmit rotary motion to the grinding-wheel I, and also from its location between the fixed pedestals preventing a longitudinal movement of the mandrel and attached wheel J.

At a convenient height above the machine a driving-shaft L is supported in a plane parallel to the shears A by its revoluble connection with the boxes of the hangers M, which latter are hung from elevated timbers or other stable support. The length of the drivingshaft L should be greater than the length of the shears A and the distance between the hangers M sufficient to permit a long drum N to be mounted on and secured to the shaft. Said drum having a true cylindrical form, is of such a relative length and diameter as will adapt it to transmit motion and power to the mandrel m by means of the belt 0, which is given a quarter-turn to locate its lower bight upon the band-pulley J, which lies in a plane at right angles to that of the drum, longitudinally considered.

On the portion of the driving-shaft L which is directly above the pulleys 1 2 3 a driving-pulley P is secured, having a breadth of face equal to that of the three lower pulleys mentioned, and on the upper and lower pulleys two belts R R are placed, which are of the same width, that should nearly equal the face breadth of the change-pulleys 1 2 3, the belt R being crossed or given a half-turn to change the direction of motion as compared to that of the other belt R. On the opposite end portion of the driving-shaft L fast and loose pulleys S S are retained by usual means, and are designed to afford means for the transmission of motion and driving force from a source of power (not shown) by the use of a main belt. (Not shown.)

A belt-shifting bar T is provided, which is of alength which will project it slightly beyond one end of the shears A through an aperture in the depending screw-nut 7c of the carriage O, and far enough outside the leg at the other end of the shears to receive the belt-shipping arms at, that project between the belts R R, as represented in Fig. 3.

Two shifting-dogs 0 are loosely mounted upon the bar T, which have clamping-screws 0, whereby the dogs may beset at any desired point on the bar, these movable devices when secured affording abutments whereon the opposite edges of the carriage C will impinge when said carriage is forced by the revolution of the screw G in either direction of travel, the contact of parts just mentioned causing the alternate shipping of the belts R R and change in direction of longitudinal movement of the carriage, as will be readily understood.

In order to assure a proper contact of the edge of the glass plate F with the grinding or polishing wheel I, a provision is made to enforce the same, and to this end two similar appliances are furnished, which are connected with the platen E and standards D near their top edges. Said pressure-jacks each consist of a bent lever it, which is pivoted by one end a to the inner surface of the standard D, (see Figs. 2 and'3,) there being similar weights 0) placed on the free end portions of the levers and adjustably secured thereto. The lower edges of the levers u rest upon the rollers 20, which arepivotally supported on studs which project from the sides of the platen E, and as the levers to project forwardly it is evident that the imposed weight on each roller will press the upper edge of the platen E and glass plate on it toward the rear of the machine and the lower edge of the plate of glass against the grinding-wheel I.

In service the dogs 0 are set at such points as will permit the reciprocal travel of the carriage C and guiding-wheel thereon a proper distance, so that the grinding-wheel I will cut a bevel face on the plate, the degree of sloping inclination from the level face of the glass being controlled by the manipulation of the hand-wheels 6. After the edge of the the pulleys l 2 3 that its terminal end 4 willplate F has been reduced to roughly form a proper bevel near its edge on the front face, the grinding-wheel, of stone or other suitable gritty material, is removed and a finer wheel substituted therefor, a buffing-wheel being employed to polish the surface, which wheel may be made of any proper material which will permit it to be clamped upon the end of the mandrel m and receive rotary motion from it.

As it is desirable to control the reciprocal movements of the machine instantly at any time during the operation just described, a long hand-shifting rod U is mounted on the shears A, so as to be readily manipulated at any point in front of the machine, which rod is loosely supported in small bracket-boxes, and is so bent at the end of the shears near align with the end of the shifting-bar T, to which it is attached, whereby the rod Uwhen moved by hand endwise will change the belts R R and reverse the movement of the carriage G, the arrest of motion being produced by throwing the main driving-belt onto the loose pulley S, as is usual with power-driven machinery.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with a pair of standards erected on a pair of elongated horizontal shears and a platen adapted to swing on the standards near its center of height, of two similar bracket arms on the platen, each adapted to loosely support a pendent forkpiece, a flanged nut on each standard, and a screw for each nut, having two radial collars which embrace the sides of each fork-piece, substantially as set forth.

2. In a glass-beveling machine, the combination, with the glass supporting frame formed with pivots, of forked pendent pieces on said pivots and screw-rods ranging transversely of the machine and formed with annular beads or collars, between which the forked ends of the said pendent pieces are loosely received, substantially as described.

EUGENE HOMAN.

WVitnesses:

F. W. HANAFORD,

O. SEDGWIOK.

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