US275298A

US275298A - Manufacture of glassware

Info

Publication number: US275298A
Authority: US
Publication date: 1883-04-03
Anticipated expiration: 1900-04-03

Description

(No Model.) 4

.W. M. WALLACE.

. MANUFACTURE OF GLASSWARE. No. 275,298. Patented Apr.3,1883.

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UNITED STATES PATENT OFFICE.

WILLIAM M. WALLACE, OF BBIDGEPORT, OHIO.

MANUFACTURE OF GLASSWARE.

SPECIFICATION forming part of Letters Patent No. 275,298,. dated April 3, 1883. Application filed December 27, 1882. (No model.)

To all whom it may concern Be it known that I, WlLLIAM M. WALLAoE, a resident of Bridgeport, in the county of Belmont and State of Ohio, have invented certain new and useful Improvements in the Mannfacture of Glassware; and I do hereby declare that the following is a full,clear, and exact description of theinvention, which will enable others skilled in the art to whichit appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to the manufacture of hollow articles of glassware-such as fruit-jar lids, Sac-having projecting inclines or screwthreads on the interior of the article, by means of which it is removably connected with the body of the vessel, the object of the invention being to provide a simple and effective mechanical combination for producing such articles, and also forming hollow articles having spiral projections, grooves, 850., of any desired form, for ornamental purposes, on their interior.

My invention is an improvement upon the class of screw-press machines, such as that shown in Patents No. 128,280 and 266,565 of United States Patents; and it consistsin details in the form of the frame and the arrangement of springs, follower, and plunger, all as hereinafter fully set forth, the object of the iuvenclines around the neck; Fig. 4, a jelly-tumbler,

showing spiral grooves on the interior for ornamental purposes.

' Like letters of reference refer to like parts.

The letter A represents the bed-plate of the press.

13 is an upright standard, provided with cross-pieces a a. to support the operating mechanism.

O is the plunger, consisting of a vertical screw-threaded rod or stem working in screwthreaded bores through the cross-supports of the frame. The upper end of this rod is provided with a wheel, M, and handle N for the application of hand-power. To the lower end is attached the plunger proper, It, having suitable grooves, b b I), in its surface to form raised inclines on theinterior of the article to be pressed.

Dis the ring-plate of the mold, having a central bore for the passage of the plunger. Itis removably attached to a bottom plate, E, to

stops 6 e, situated at such a point on the rods as will permit the ring-plate engaging the top of the mold before the stops strike the crosssupports a a of the frame.

His a mold for forming fruit-jar covers.

K is a glass cover, showing raised inclines g g on the interior, corresponding with the grooves on the plunger.

In Fig. 3, J is a fruit-jar having raised inclines h it around its neck corresponding with those on the plunger. it is a rubber gasket.

Fig. 4 represents a glass goblet. M represents spiral grooves around the inside to increase the brilliancy of the glass, which can be readily formed with my device by simply putting screw-threads on the plunger. A series of small beads can also be formed in a similar manner to add to the appearance of the vessel.

The mode of operation is as follows: The glass-mold is placed under the plunger and a sufficient quantity of molten glass placed therein to form the article. The operator then runs down the plunger into the mold, carrying with it, by means of the cross-head, the frame supporting the ring-plate, which centers on the mold before the plunger reaches it. When the ring-plate strikes the mold the frame-rods pass up through the cross-head as the plunger continues its way down into the mold. As the plunger leaves the mold the ring-plate does ICC not follow with it, but by aid of the springs under the cross-head the ring-plate continues to be pressed down against the mold until the plunger is removed from it, which is done by simply turning back or unscrewing the plunger by means of the wheel at the upper end. The ring-plate, being operated by the same power as the plunger, and remaining upon the top of the mold until the plunger is entirely withdrawn, is a very important feature of my invention, for the hotglassis thus held in place and prevented from getting twisted or distorted by adhering to the plunger as it revolves or twists out of the mold. This is a great advantage in articles where interior screwthreads are formed. The necessity of operating the ring-plate by separate mechanism, or removing the same by hand as each article is pressed, is done away with.

Thejar-cover illustrated in the drawings is one intended to be usedwith a jar having corresponding raised inclines around its neck. The inclines on the cover passing under those on the neck of the jar operate to hold the lid securely in place. it will be understood that these inclines are not segments of a continuous screw-thread or spiral, but are segments of a series of screw-threads starting from a level plane, and consequently do not require the cover to be so deep as where the continuous screw or segments of the same are used. By this arrangement of the inclines I manage to make a great saving in the manufacture of this class of goods.

I am aware that a sheet-metal cap having raised inclines on the inside resembling those shown in my invention has been used in connection with a glass jar having grooves or inclines in recesses of the same inclination to receive the raised inclines of the cap; but this form is impracticable where the cap and jar are both made of glass, for the reason that the unequal contraction of the glass in thejar and cover during the process of manufacture gives an uneven bearing-surface for the inclines and results in breaking them off when force is applied to screw on the lid. The raised inclines would also bind in the grooves and from the resistance give trouble in putting on and taking off the lid.

In myinvcntion the locking-inclines are both raised from the surface of the glass, and the only bearingis a continuous one on the side of each incline,which, being slightl rounded, accommodates itself to any slight variations of the two inclines caused by irregular shrinkage in cooling.

By disposing of the inclines on a level plane around the inside of the lid I am enabled to make the inclines large and full, and produce a suitable cap at about one-half the depth required for those where a continuous screwthread or segments of the same are employed; and I am also enabled to reduce the cost of manufacture in proportion to the saving effected.

I am also aware that it has been suggested to make a glass jar and glass cap with raised inclines on the neck of the jar and inside of the cap arranged as segments of a continuous screw-thread; but this I disclaim for the reasons heretofore set forth relating to continuous screw-threads.

The construction of the base and the curved standard is a convenient one for the kind of work which is done upon this class of machines, bringing all the parts convenient to the hand of the operator. The two cross-pieces a a give firm bearings for the threaded shank of the plunger and hold it accurately in a perpendicular position. This accuracy is also assisted by the rods F F, which pass through the ends of the cross-pieces a a. The springs are located in the upper part of the apparatus, where they are not liable to be afi'ected by the heat. The stops 0 e are nuts held upon threaded portions of the rods, so that they may be adjusted up and down in order to raise orlower the follower, the cross-head being raised or lowered to correspond to the position of the stops 0 6, thus allowing the follower to be set up or down in different relations to the lower end of the plunger to adapt the apparatus to articles of different depth or thickness without interfering with the tension of the springs.

Having described myinvention ,whatIelaim, and desire to secure by Letters Patent of the United States,-is-

l. The described press for forming threaded articles of glass, consisting of a suitable base and standard provided with cross-pieces, with a threaded hole to receive the plunger, of a threaded plunger, 0, rods F I carrying the follower D E, and connected to the plunger by a cross-head, springs c 0 upon the rods between the cross-head and stops, the said plunger carrying a properly-threaded tool upon its end, the parts being combined and operating as set forth.

2. The base A, curved standard B, upper and lower cross-pieces, a a, formingbearings for the plunger-shank O, the rods F F, and springs placed upon the rods, the parts specified being combined with each other and arranged in the machine as set forth. 7

In testimony that I claim the foregoing as my own I hereby affix my signature in presence of two witnesses.

WILLIAM. M. WALLACE.

4 Witnesses:

J. V. L. RODGERS, 131B. HOWARD.