US1003699A - Collar for glass lamps. - Google Patents

Description

E. W. BRYCE.

COLLAR FOR GLASS LAMPS.

APPLIOATION FILED MAY 12,1910.

1,003,699. Pa ented Sept 19,1911.

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UNITED STATES PATENT OFFICE.

EDWIN W. BRYCE, OF PITTSBURG, PENNSYLVANIA.

COLLAR FOR GLASS LAMPS. .1

To all whom it may concern:

Be it known that I, EDWIN IV. Baron, a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Collars for Glass Lamps, of which the following is a specification.

The object of this invention is to provide eflicient and durable burner-holding means for glass lamps.

While various substitutes have been proposed for the familiar cemented collar, the latter is still almost universally used though decidedly objectionable for various reasons. One is the danger of the collar becoming loose under the considerable weight of the burner, chimney and shade, and permitting the latter to fall and break and endanger the premises by fire. And even though the cemented collar may not lose its hold entirely, the cement is liable to open and create a leak. Furthermore, the cementing of these collars involves considerable time and expense. With the present invention I overcome all of these difliculties by providing what may be termed a two-part collar, the inner part, which is in fact a bushing, being cast in the glass lamp durin the process of molding the same, making it substantially integral therewith. These parts or fittings are usually formed of sheet brass, and as the inner'or bushing part is cast in the lamp it must pass through the leers in the annealing process, sand the heat destroys its luster or burnish. But as the neck and the cast-in bushing are inclosed by the outer member of the collar, or the collar proper, applied after the lamp has been annealed, the external appearance is the same as though the collar were cemented in the usual way. The outer member, or collar proper, simply provides a conventional finish for the lamp neck, and as it sustains no Weight it may be loosely applied and is thus readily removable for the purpose of thoroughly cleaning the lamp, though of course it may be cemented or otherwise permanently secured if desired.

In the accompanying drawings, Figure 1 illustrates the body and neck portion of a lamp provided with the improvement, the same shown partly in elevation and partly in section. Fig. 2 is a similar view of the lamp neck with the outer member or collar f 55 proper removed, and Fig. 3 is a like view Specification of Letters Patent.

Application filed May 12, 1910.

Patented Sept. 19, 1911.

Serial No. 560,873.

of the outer collar, while Fig. 4 is a similar view of the inner collar member or bushing.

Referring to the drawings, 2 is the lamp body or oil reservoir of a glass lamp, and 3 the integral neck. The fittings for the neck may be of sheet brass and are preferably formed in two parts, the inner part 4 being of ring-like form, in effect a bushing, which is corrugated to form the usual internal burner-attaching threads 5, the corrugation appearing in the outer surface of the bushing, as indicated at 6. During the forming operation neck portion 3 thereof is cast around the bushing 4, the latter being sustained in the mold in any suitable manner. Under the casting pressure the glass forms in and around the corrugations 6,

and thus obtains such a hold as to make the' bushing and neck practically integral. The lower edge of bushing 4 may be shaped with the out-turned annular lip 7 which becomes embedded in the glass, as shown in Figs. 1 and 2, and the upper edge 8 may be similarly projected over the top surface of neck 3. Lip 7 increases the hold of the glass on the bushing, and furthermore precludes removing the bushing by screwing it out of neck 3. Also, with said lip a smooth rounded edge is formed at the lower end of the bushing which will not catch the wick or cleaning cloths inserted through the neck, and it also prevents oil and dirt from working up behind the bushing. The out-turned upper edge 8 also avoids the formation of a sharp edge at the top of the screw threads, and affords a flat surface finish for the top face of neck 3.

The collar proper 9 fits down over neck 3,

being provided with the usual flange 10 to fit the body at the base of the neck, and is also preferably formed with the inturned top edge or lip 11 which fits down on the neck, in the present instance overlapping edge 8 of bushing Collar 9 may be permanently secured by cement or other means, or it may remain loose and be removed whenever the burner is taken off so that both the collar and the lamp neck may be thoroughly cleaned.

As bushing 4: is cast in the lamp body during the molding operation, it is of course in place while the lamp is being annealed, so that if formed of brass, as it usually is, its surface finish or burnish is destroyed, but as the whole neck is inclosed by collar 9 applied after the lamp has been annealed, the bushing is not exposed, and the fact that its surfaces are not bright is of no consequence.

It will be understood that the means here shown ,for forming an interlocking connection between the bushing and the glass lamp body is only one of numerous adaptations of the broad idea of casting, and thereby securely holding, a burner attaching device in place. And While the outer collar 9 will usualy be employed, as it adds greatly to the appearance oi the lamp, it is ornamental merely and may be dispensed with if desired.

I claim 1. As a new article of manufacture, a glass lamp having a neck cast integral therewith, and a burner holding device around which the neck is formed and to which it is permanently united by the cast-ing pressure to which the neck is subjected.

2. As a new article of manufacture, a glass lamp having a neck cast integral therewith, and a threaded burner-holding bushing around which the neck is formed and to which it is permanently united by the casting pressure to which the neck is subjected.

3. As a new article of manufacture, a glass lamp having a neck cast integral therewith, and an internally threaded externally indented burner-holding bushing permanently embedded in the neck by the casting pressure to which the neck is subjected.

4. As a new article of manufacture, a glass lamp having a neck cast integral therewith, and a threaded burner-holding bushing around which the neck is formed and to which it is permanently united by the casting pressure to which the neck is subjected, the extremity of the bushing having an annular outwardly projecting lip flush with the top extremity of the cast neck.

In testimony whereof I affix my signature in presence of two witnesses.

EDWIN WV. BRYCE.

Witnesses:

J. M. NESBIT, F. E. GAITHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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