US205648A - Improvement in lanterns - Google Patents

Description

J. H. IRWIN. Lantern.

10.205.648. Patented July 2,1878.

JIm Hlrwin UNITED earns rama IMPROVEMENT ,VIN LANTERNS.

S eciticalion ormnw .nrt oi" Letters Patent No January To all whom it may concern:

Be it known that 1, J oHN H. IRWIN, ot Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Lanterns, which is fully described and claimedin the following specitication, reference bein g had to the accompanying drawings, in which- Figure 1 represents a vertical section ol` a lantern embodying my improvement, and Fig. 2 a similar section ot' a lantern-top, showing a modification 'in the construction of the top in Fig. 1. y

My invention relates to an improvement in globe lanterns, whereby the continuity of the air-supply to the burner and the drat't through the chimney is not interrupted by atmospheric currents Without the lantern, or by movement of the latter in anydirection whatever.

The invention consists inthe combination, with a lantern, of an atmospheric injector composed of a series of deecting-plates inclined inwardly and downwardly, constructed and arranged with reference to the chimney so as to constitute therewith a balanced atmospheric injector and ejector, by means ot' which the continuity ot' the circulation in the lantern is always preserved.

In the drawings, A represents the oil-pot of the lantern; B, the burner G, the chimney, and D the globe, this improvement being applied to lanterns provided With both globes and chimneys.

The globe is hemi spherical in form, or it lmay be in the shape of an4 elongated hemisphere, the upper portion thereof being straight, or nearly so, for a short distance, as shown at d, in Fig. l ofthe drawings.

An atmospheric injector, E, is arranged upon the top of the globe D, to the rim of which it is attached by any suitable means. This injector is composed ot' the conical plates e, e1,and e2, arranged as shown in the drawings; but the particular construction and arrangement it is not necessary here to specify with greater exactness,as this injector is fully described and shown in Letters Patent No. 150,958, heretofore granted to me, (Ma-y 19,- 1874.)

The chimney C extends up Within the in jector even with the top of the latter, or slightly 205,648, dated July 2, une; @plannen am ,30, 187s.

above it, and is covered by a conical cap or top, F, which is constructed vof a size to tit the upper plate e of the injector, to which it is attached by suitable devices. The devices shown consist ot' clasps f attached to the top and arranged to slip over the outside oi the plate e, while on one side ot' the top is a setscrew, j", which isturned down to hold the top in place after the clasps are slipped over the injector-plate, as shown in Fig. l of the drawings.

It is evident that with these devices the top is removable, but it may be permanently attached to the injector, if desired, and it' the globe is made removable; and the devices for .securing it to the injector may be of any description suitable for the purpose, according as it is desired to have tl detachable.

y In the drawings, the globe D is shown permanently attached to the bottom A51-'but it is evident that this construction is .not necessary, asthe globe can be readily made detachable in any ot' the well-known ways.

The air is admitted to theburner' underneath the jacket or skirt b through holes b in the cylindrical portion of the burner below the cone, and a detlector, G, is placed around the wick-tube at the top thereof in a manner and for the purpose well known and understood.

The top ofthe cap F is some little distance above the top ofthe chimney C, so as to leave a free space or chamber t'or the escape of the products of combustion from the latter. The lamp is provided with a bail, H, by which itis carried.

Now, if the lantern is subjected to the action of atmospheric currents, whether natural or produced by any sudden movement ot' the lantern itself, the air will be caught by the deecting-plates ot' the injector and forced downward into the globe in the manner already described in my prior patent, mentioned above, and in another application of even date herewith. The air within the globe is turned into the burner, both on account of the shape the air within the chimney by heat from the burner.

The products of combustion rise through the chimney C and escape from the top'fthereof le top permanent or y ot' the globe and because of the ra-refaction of into the chamberI forward by the top F, whence they iiow downward and outward through the openings in the injector E on the side opposite to that of the entering current of fresh air.

The chimney arranged as described in relation to the injector operates as an ejector, so that in connect-ion with the former there is a combined balancing atmospheric injector and ejector operating upon the same principle and substantially in the manner described in my application ot' even date herewith for a combined atmospheric injector and ejector.

The circulation within the lantern is thus kept up, even when subjected to changing currents, for as the injector is annular in form the air will be caught from whatever direction it comes, or whatever may be the movement ofthe lantern, and the operation being always as hereinbefore described, the atmospheric circuit can never be interrupted and the light put out.

The injector E, shown and described, is of special construction, but it may be modiied somewhat without materially atfectin g the result hereinbetbre set t'orth. The reversingplatcs c2 may be dispensed with, for instance 5 or the openings in the injector may be less in number than shown, and yet tolerably good results obtained.

In the construction shown the plate c2 catches the air and drives it into the lantern when the latter is moved downward, or when a current blows from this direction; but when removed the induced current will be sufficient to keep up the exhaust from the top of the chimney, so as not to interrupt the circulation, fresh air being taken in at the sides by the action ofthe induced current sutticiently to keep up the necessary supply.

In the construction shown in Fig'. l ot' the drawings, the top Fis designed to be made of sheet metal; but a glass top may be preferable for some reasons, and in Fig. 2 I have shown such a top adapted to this style of lantern. The main portion l ot' the top is hemispherical inform, and the globe and top may be constructed so as to represent parts ot' the same sphere.

This glass top I is secured to a metallic fastening-ring, J, which is adapted to lit within the upper plate c of the injector like the top F, and is secured thereto by the devices shown in Fig. l of the drawings, or any others which will permit the top to be detached, this latter feature ot' construction being desirable with a glass top. It is also necessary to provide means for takin g away the heated gases from the glass top I more speedily than with the metallic top F, so as to avoid any danger of cracking the top by overheating.

A short tube, li, is therefore inserted in the top ofthe glass portion I, and upon the upper end ot' this ytube is arranged an atmospheric ejector, K, which is constructed like the ejector described and shown in Letters Patent No. 173,958, granted to me February 22, 1876.

The general operation with this style of top is the same as with the top F; but if the hot gases escaping from the top of the chimney are not quickly taken oft', as heretofore described, a portion will be taken up through the tube@ and carried out into the atmosphere by the action ot' the ejector K, thereby relieving the top from overheating.

I do not limit myself to the precise construction and arrangement of any of the parts here shown, as they lnay be moditied as circumstances may require. It is necessary, however, in carrying out my invention, that the top of the chimney should be nearly on a level with the top ot' the injector, and that there should be a chamber above the top of' the chimney, otherwise the balancing effect above described will be materially modilied, and under certain conditions will entirely disappear.

Having thus described my invention, what I'claim, and desire to secure by Letters Patent, is-

1. In a globe lantern, an annular atmospheric injector composed ot'a series of detlecting-plates inclined inwardly and downwardly, arranged above the globe, in combination with a chimney extending up within the injector to a point above the inlet-openings for the currents ot' air, and a closed top arranged above the chimney, substantially as described.

2. The annular injector E, in combination with the globe D, burner B, chimney C, and top F, arranged and operating substantially as described.

J. H. ERVIN.

Witnesses:

L. A. BUNTING, JNO. C. MAcGrRnGoR.

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