US1790709A - oe chicago - Google Patents

Description

Feb- 3, 1931- J. H. HoRsLEY 1,790,709

AGETYLENB LAMP 1 Filed Feb. 1o', 1930 Patented Feb; 3, 1931' UNITED STATES ranma PATENT onirica IAMES H. HORSLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TOV 'UNIVERSAL LAM? COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS I ACETYLENE LAMr Application filed February 10, 1930. Serial No. 427,154.

This invention relates to improvements in acetylene lamps, particularly the type designed for miners use.

The general object of the invention is the provision of an improved feature of equipment for such lamps whereby manipulation of the lamp for refilling is facilitated and whereby thev lamp is aorded protection against distortion and injury such as requently results from a customary method of handling it. c

Other objects will be pointed out or indicated hereinafter or will be apparent upon an understanding of the' invention.

In the accompanying drawing I show certain' forms in which the invention may be embodied and utilized, but it is to be understood that these are presented for purpose of illustration only and are not to be accorded any interpretation calculated to limit the appended claims short of the true and most comprehensive scope of the invention in the art.

In said drawing,

Fig. 1 is a side elevational view of a miners acetylene lamp embodying the present invention;

Fig. 2 is a sectional elevation of the carbide reservoir or container;

Fig. 3 is a perspective view of the gripping buffer; and

Fig. 4e is a view illustrating a manner in which the carbide container is customarilyv treated incident to refilling.

There are various familiar forms of miners acetylene lamps which have detachable carbide containers forming the lower portion of the lamp assembly, said containers being screw-threaded to the cooperating portion of the lamp and removable for purpose of relling When a lamp has been burning for some time, the carbide container is likely to become quite hot, both from the heat of the iame and from the heat of reaction generated by the slaking of the carbide. This not only renders it diiiicult to handle for unscrewing it, but also tends to make the screw-threaded portion bind, due to the expansion of the heated metal. With slaking, the carbide residue becomes more or less caked or compacted in theV carbidecon-k tainer, and its removal in eithera moistened or dry condition is thereby rendered somewhat diliicult. In order to loosen the caked residue so as to permit its being` shaken out of the container, the miners are in the habit of tapping the container against some hard object, and as a result of such treatment the containers are frequently dented and distorted and rendered leaky by the opening of a seam or perforation of the metal.

The present invention provides a simple and convenient improvement in the const-ruction and equipment of such lamps, whereby the removal of the heated carbide container 1s facilitated and it is protected 'from injury by treatment such as just described.

' The nature of the improvement will be clearly ascertained from the illustrations. In the drawing the reference numeral 10 designates the body portion Vof a miners lamp of well known design and construction, which body portion carries the water reservoir,

water feed control, burner reflector, etc., as well as the hook lland brace 12 whereby the lamp is adapted to be suspended and positioned on the minerscap. Screw-threaded into the lower portion of the body portion is f the carbide container 14e, which is a hollow metal receptacle adapted to hold the carbide from' which the gas is generated by water which is dropped into the container from the water Vfeed device.` The screw-threaded neck 14a of the container fits in a correspondingly screw-threaded socket on the body portion, and a tight joint is afforded by means of a rubber gasket V15. An outstanding peripheral Ybead 14lr is provided at the junction of the bottom and side `of the container, said bead either being rolled in the metal, or being formed by the seaming of the bottom and side together. A gripping buer 16, formed of a suitable yielding material having heat insulating properties, such as rubber, is provided and fitted onto the lower portion of the container. This gripping buffer is of cuplike form, so that it will embrace the peripheral wall of the container for some distance, and cover the edge or bead at the junction ofthe bottom and side. It preferably is provided with an internal groove 16a for receiving the bead at the bottom of the container, and should be of substantial thickness in the portions surrounding the bead. Due to its elastic properties, it may be thus tted onto the container and hold a position in close contact with the same. It should it'with suicient closeness to prevent its rotating Y on the container, and such adhesion may be brought about by effects occurring from the heating of the container.

This gripping buier affords a secure enn gagement for the hand in the unsc'rewing of the container from the lamp body, and also, due to its heat insulating properties, protect-s the hand from the heat of the container in such operation. As illustrated in Fig. 4, this equipment also aiifords an eiective buffer to protect the container against denting and distortion when pounded upon a solid object in the customary fashion for loosening the carbide residue. It also affords a heat insulating element between the carbideY container and a portion ofthe vminers cap against which it may bear when the lamp is worn on the cap.

What I claim is:

1. The combination with an acetylene lamp having a body portion and a detachable carbide container, of a gripping buffer of elastic heat-insulating material enveloping the lower portion of the carbide container and consti- I tuting a hand-hold Iand protection for same against impacts to dislodge carbide sludge from the container. Y

2. A combination as specified in claim 1 and wherein the carbide container has a peripheral protuberant bead at the junction of its side and bottom portions and the gripping buer has an internal circumerential channel accommodating the bead.

3. An attachment for the carbide container of an acetylene lamp, comprising a cup-like 1 gripping buier Jormed of elastic heat-insulating material and shaped to t onto and envelop portions of the carbide container at and adjacent the junction of the side andbottom portions of the latter to form both a protection for said portions against impacts to dislodge sludge and a hand-hold for manipulation of the container.

4L. An article as specified in claim 3 and wherein the gripping' buffer is formed with an Yinternal Vcircumferential channel for accommodation of a peripheral bead on the con tainer.

In testimony whereof I have hereunto subscribed my name.

JAMES H. HoRsLEY.

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