US825977A - Glass-mold. - Google Patents

Description

PATENTBD JULY 17, 1906.

A. G. NEVILLE.

GLASS MOLD. APPLICATION FILED JAN.12. 1906.

2 SHEETS-SHEET 1.

guarantor 1X 5 messes A .Ci/Y viLL No. 825,977. PATENTED JULY 17. 1906. A. G. NEVILLE.

GLASS MOLD.

AP-PLIGATION FILED JANJZ, 1906.

2 SHEETSSHEBT 2.

THE NORRIS PETER! co., WASHINGTON, n. c.

ASA G. NEVILLE, OF WELLSBURG. WEST VIRGINIA.

GLASS-MOLD.

Specification of Letters Patent.

Patented Ju1y 17, 1906.

Application filed January 12,1906. Serial No. 295,771.

To all whom it may concern.-

Be it known that I, Asa G. NEVILLE, a citizen of the United States, residing at Wellsburg, in the county of Brooke and State of l/Vest Vir inia, have invented certain new and useful mprovements in Glass-Molds, of which the following is a specification.

This invention provides a mold especially for use in the manufacture of shades or globes for mantled burners and requiring openings near the lower end or base for the admisslon of air to support combustion. Such openings have heretofore been provided in difierent ways, either by punching the article after it has been molded or by forming hollow projections upon the article at the time of its molding and subsequently removing said projections. The first-mentioned operation is preferred, as it enables the article to be formed in paste-molds, but is somewhat more expensive. The latter operation, although less costly, produces an inferior article both in appearance and durability, since it is not susceptible to quick changes in temperature and will crack.

This invention provides a mold having a rim or flange surrounding the blow-overs, into which the glass is blown to form the hollow projections corresponding to the airopenings, the purpose of the rim or flange being to indent the shade, globe, or other article at the base of the hollow projections, whereby a rounded finish is given to the airopenings after the hollow projections are filed, ground, or otherwise removed, thereby producing an article equal to one having the air-openings punched therein at a less cost.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is tobe had to the following description and accompanying drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the preferred embodiment is shown in the accompanying drawings, in which- Fi ure 1 is a vertical longitudinal section of a mold embodying the invention on the portion line a: m of Fig. 2. Fig. 2 is a horizontal section of the mold on the line y y of Fig. 1. Fig. 3 is a side view of the lower or base portion of a shade or globe as it appears when first taken from the mold and prior to removal of the hollow projections. Fig. 4 is a detail section of the shade on the line to w of Fig. 3. Fig. 5 is a view similar to Fig. 4, having the projection removed. Fig. 6 is a view similar to Fig. 4, showing the portion bordering upon the opening as it Wlll appear when completec Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The mold illustrated in the accompanying drawings is of the sectional type and comprises an oscillatory section designed to obviate the formation of a seam upon the finished article. The shape of the mold will depend upon the outline or design of the finished article, it being understood that the invention is adapted to various kinds of molds for shaping glassware which in its finished stateis desired to be provided with air or other openings. particularly desi ned for molds used in the manufacture of shades, globes, or the like for burners having mantles, it is shown in this connection in the accompanying drawings.

The mold comprises the bottom 1, body 2 and end section 3 the latter corresponding to the lower or base portion of the globe, shade, or finished article. The bottom 1 is preferably stationary, as is also the end section 3, whereas the body portion 2 is arranged so as to have an oscillatory movement imparted thereto for obviating the formation of a seam, said body portion having the mold-cavity coated with the usual paste composition. The several sections 1, 2, and 3 are jointed to hold them in fixed relation, and for this purpose a dovetail or undercut projection extends from the meeting end of one section and snugly fits within a groove or rabbet in the meeting end of the adjacent section in the accustomed manner, so that when the sections are assembled and closed they are prevented from casual displacement.

The invention deals more particularly with the means for providing the openings in the Since the invention is.

f the finished article.

- in the finished article.

finished article, and, as shown, said means are applied to the end section 3, which latter is composed of a plurality of members hingedly connected to admit of their readily clearing the article after the same has been molded. In accordance with this invention the mold is provided upon its inner side with a blow-over 4, into which a portion of the glass is blown in the process of molding, thereby providing the hollow projection 5, which is subsequently removed to form the air or other openingin The blow-over 4 consists of a depression or opening preferably of conoidal shape and having a vent 6 leading therefrom. A rim or flange 7 surrounds the blow-over 4 and is intended to indent or form a groove 8 in the article at the base of the ho low projection 5, with the result that the .opening 9 in the completed article presents a rounded finish upon the exterior of said article. The blow-over 4 and indenting rim or flange 7 may be provided in any manner, and in the preferable construction the sameconstitutes part of a plug 10, which is set into the mold in any manner, said plug being threaded upon its exterior and screwed into the mold, thereby admitting of the plug being replaced or adjusted, as may be required. The provision of the plug 10 enables the mold to be cheaply manufactured and also provides for projecting the rim or flange 7 to any distance from the molding-face and enables the substitution of a new plug should the inner end forming the rim or flange 7 become injured from any cause. For a mold of the type herein shown the blow-overs are applied to the end section 3 only as the openings 9 are to be formed in the lower or base portion of the shade or globe. However, the blowovers 4 may be located in any part of the mold corresponding to the required openings As shown, each member or section of the part 3 is provided with a blow-over, and by having said sections pivoted or articulated they are enabled to clear.

" the projections 5 without interfering in the least with the article when opening the mold preliminary to removal of the article therefrom. I

When using a mold provided with blowovers constructed in accordance with this invention, the glass when blown to conform to the mold has portions forced into the blowovers 4 to provide the hollow projections 5, which latter are indented or grooved at their base, as shown at 8. After the article is removed from the mold it presents the appearance substantially as shown in Fig. 3 and in the sectional view Fig. 4. The articles thus formed pass out of the hands of the skilled workman and are adapted to be finished by comparatively cheap labor, such as afforded by boys and girls, in the cutting-shop. In

the finishing operation the hollow projections 5 are removed either by filing or grinding, and when removed the article presents the appearance substantially as shown in the sectional View Fig. 5. In the final step the portion of the article surrounding the openings formed by removing the hollow projections is fused, which glazes the edge of the openin and causes t e material bordering upon the openings to assume the form substantially as illustrated in Fig- 6. The mold section provided with the blow-overs is stationary, whereas the main portion is adapted to have an oscillatory movement imparted thereto afterthe article has been blown, so as to obviate the formation of a seam. The indentation or groove 8 at the base of the hollow projections is of vital consequence, since in the initial formation of the globe, shade, or like article the opening 9 has its outer edge rounded, so as to present the much-desired finish. The indentation or groove 8 also results in a material saving, since in practice it has been found to obviate the destruction of many articles which heretofore have been cracked or broken in the process of removing the hollow projections 5. This saving is doubtless attributable to the inner flange produced around the opening or base of the hollow projections 5 by means of the indentation or groove 8.

Having thus described the invention, what is claimed as new is 1. A mold for glassware comprising a relatively fixed section and an oscillatroy section, and plugs fitted to the fixed section and provided at their. inner ends with blow-overs and indenting-rims, the blow-overs adapted to form hollow projections upon the article when molded and which hollow projections when removed provide the desired openings in the completed article, the indenting-rims forming grooves at the base of the hollow projections to give a finished appearance to the openings and'to prevent in a measure cracking of the article when removing the hollow projections.

2. A mold for glassware comprising a relatively fixed section and an oscillatory section, and plugs removably and adjustably fitted to the fixed section and provided at their inner ends with blow-overs to form hollow projections and with indentin -rims to form grooves at the base of the ho low proj ections, said indenting-rims projecting from the molding-face into the mold-cavity.

3. A mold for glassware comprising a relatively fixed section and an oscillatory section, the fixed section being provided with blow-overs to form hollow projections upon the article when molded and which hollow projections when removed correspond to the desired openings in the completed article.

4. mold for glassware comprising a rela- In testimony whereof I affix my signature tively fixed section and an oscillatory secin presence of two Witnesses. tion, the former being provided With a series L ASA G NEVILLE [L- 8.]

of blow-overs and indenting rims or flanges,

5 one for each blow-over and surrounding the Witnesses:

same, substantially as and for the purpose V. B. HILLYARD, specified. J. D. YOAKLEY.

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