US206478A - Improvement in lanterns - Google Patents

Description

2 S11eets-Sheet .1

AAN. PAULL.A

Lantern.'

Patented July 30,1878.

No. 206,478. nj/.L

N PETERS. FHOKLLITHDGBAPNER. WASHINGTON, D 2A 2 Sheets-Sheen 2.

A. W. PAULL.

Lantern.

Patented July 30,1878.

OOO

GOO() O00 /IIAIIIIIII MPEIEHS, PHD R. WASHINGTON D c UNITED STATES PATENT FFICE ARCHIBALD IV. PAULL, OF VHEELING, TEST VIRGINIA.

IMPROVEMENT IN LANTERNS.

Specification forming part of Letters Patent No. 206,478, dated July 30, 1878; applicaticn filed J uly 1, 1878.

To all whom it may concern.-

Be it known that I, ARCHIBALD W. PAULL, of Wheeling, county of Ohio, and State of Vest Virginia, have invented certain new and useful Improvements in Lanterns, of which the following is a full, clear, and exact descrip tion, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Figure `1 is an axial section of a hand-lantern embodying the several features of my invention, and adapted to operate in accordance with the principles thereof. Fig. 2 is an axial section of so much of alantern as is necessary, showing a modified arrangement of the tubes illustrated in Fig. l; and Fig. 3 is a plan view of the lower side of the chimney-base shown in Fig. 2. Fig. 4 is an axial section of so much of a lantern as is necessary, showing a further modified arrangement of the several air-channels, wherein. the openings are made directly into a chamber beneath the cone; and Fig. 5 illustrates a'device similar to that of Fig. et, except in the relative distance between letters in all thefgures indicate corresponding parts. Y

The construction, operation, and utility of the tubular lanterns77 are well known, and for the purposes of this'description need not be herein particularly pointed out. It will be sufficient to mention that they, by a counterbalance of the several air-currents created by swinging, jarring, and otherwise using the lantern, effect a steady and uniform flame not heretofore attainable without the use of the tubes. These tubes have heretofore been malle to receive air at a pointK in the region of the top of the globe, and from this point to conduct air down to an air-chamber beneath the burner. In this position the tubes must iuterceptsome of the light from the flame, and they add materially to the expense of manufacture, as well as detract from the symmetrical appearance of the lamps.

The object of my invention is therefore to dispense with these tubes, and to produce a lantern without them which will stand all the tests and answer all the purposes of the aforementioned class of devices.

To accomplish this the invention consists in certain peculiarities of construction and arrangements of parts, as will be hereinafter rst fully described, and then pointed out in the claims.

A is the globe or chimney of the lantern,

- having the guard-wires B, if necessary, and

the dome G. D is the cone, extending up above the wick-tube E, and intended to protect the flame in a manner well understood. The space within the globe and around this dome or cone is denominated the flame-chamber,77 to which there should always be an admission of fresh air to support the ame. In Fig. 1, fresh air is supplied to the flame-chamber through the foraminated plate a, the tubes F, of which there lnay be any desired number, being separated, so as to admit the air.

The air-chamber b, loca-ted above oil-reser voir G, is surrounded by a cylinder, c, which joins the said air-chamber with the cone D. This air-chamber receives fresh air through the tubes F, and thcselatter are open, as at f, a point, as will be observed, very nearl the base of the chimney. The tubes F also have an opening at e, leading into the fla1ne-cham ber, and, under certain circumstances, admit ting an increased volume of jair to said chamber, or affording a more free egress for air therefrom, as will hereinafter appear.

Under ordinary circumstances, when thelan tern is burning and stationary, and the draft uniformly quiet and steady, the requisite amount of air will be supplied through the foraminatcd plate c, supplemented, it' necessary, by an additional supply through the openings e f, according to the state of thc llame. This foraminated plate a (located at and closing the mouth of the globe) operates to prevent the too sudden ilow of air-currents either from or into the globe, and, in the event of an extreme pressure in either direction, bccomes, for all practical l purposes, a barrier to the passage of said currents, forcing them to take the directions as indicated through the various channels, intended to cause them to flow in such manner as will produce the counterbalanciu g effects.

lVhenever the lamp is suddenly elevated, a portion of the air within the name-chamber tends to descend through the open slot in the cone, and unless this current be counterbalanced a flickering ofthe iiame or its complete extinguishment results. The air which is admitted through tubes F to chamber b passes up under the cone, and meets and counteracts or counterbalances the aforementioned descending current, thus rendering the flame steady. A surplus of air will iind its way out of the dame-chamber through the openin gs ef,- and in order that the operation ot' the lamp may be perfect under all circumstances, these openings should be so proportioned, with respect to each other and to the several air-passages, as to admit the passage in either direction ot' a quantity ot' air sufficient to balance the current in the reverse direction.

Probably the severest test which can be applied to the lantern is to allow it to drop sudden] y and then instantly arrest its motion. This affords an instantaneous reversal otl the several air-currents which can in any way at'- i'ect the flame. Under this test the currents take the direction indicated by the arrows in Fi 1, a portion of the volume ofthe air finding its way out through openings e f, as well as through plate u, and that portion, tending downwardly through the iiamc-slot, is counterbalanced by the upward tendency of the current from the air-chamber b.

In order to prevent heating of the oil in the reservoir G it is preferred to elevate the burner somewhat, as in Fig. l; but the sa-me objects and purposes, so far as the flame is concerned, may be attained by turning the tubes F directly under plate a, or directly under the globe, as indicated in Figs. 2 and 3.

Instead of employing a number of separate tubes, as F, the invention also contemplates the union of them into one chamber, as in Fig. 4, extending this beneath the entire globe, and periorating it, so as to att'ord a like free movement for the several air-currents, as in the other figures.

In Fig. 5 this extended air-chamber is shown as supported a distance above the oil-cup npon the standards H H.

Experience and practical tests demonstrate Y*that when the lantern is constructed in accordance Ywith the'foregoingdescription it answers all the purposes of the tubulalantern, orrof such lanterns as require the use of two globesYY or chimneys, and at't'ords a more steady flame than either, as well as one practically more difficult to extinguish. The location of the conduits for the counterbalancing currents of air entirely below the line of the tlame makes the construction of the lantern much more simple and less expensive, and in many other respects preferable to the ordinary tubular form or to the double-globe form.

The cone D is closed at its sides, or its walls are imperforate, so that the flame-chamber is divided from the space beneath the cone except through the passage afforded by the iiame-slot, and the arrangement of the parts of the hase of the lantern is such as to deflect the vertical currents o't' air descending in close proximity to the exterior of the chimney into the air-chamber beneath the cone, and thence up through said cone, whereby the desired counterbalancing effects are produced.

As before intimated, I am fully aware ot many forms of lanterns receiving either heated or cold air at points above the top of the chimney, and conducting it downwardly through tubes exterior to the iiameguard, and into a chamber or channel beneath the burner.

I am also aware of the fact that in the older styles of lanterns these tubes have been omitted, but no provision made for counterbalancing the dii'erent currents of air wit-hin the flame-guard-as, for instance, in the patent ot' Haynes, of March 1S, 1873, wherein the cone is open at the sides, and wherein the exterior air is deliected by a ring or iiange applied beneath the chimney. Under such construction, air leaving the ilame chamber at the base would draw with it in the same direction the air from beneath the cone, whereas under my improvements any current of air leaving the ame-chamberat the base must be counteracted in its effects upon the flame by a current up through the cone in precisely the reverse direction, and thus the iiame is not exposed to the action ot' a single current in any one direction.

The construction shown in the reissued patent to Sargent, of January 23, 1866, involves the use of the double globes hereinbefore alluded to, wherein the interception ot' light by the objectionable tubes is obviated, but an equivalent expense in manufacture incurred.

I desire, further, to acknowledge that the interception of light by the air-tubes has been obviated and the cost of construction reduced by making these tubes of glass a-nd as a part of the globe.

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

1. In a lantern having a single globe wherein the descending and ascending currents are counterbalanced by reverse currents from or toward the exterior, the combination,with said globe and its foramina-ted bottom, of air ducts or channels receiving fresh air from a point at \er near the base of the globe and conducting the same to the under side of the close-walled burner-cone, and having also a communication with the space exterior to said cone and within the globe, for the purposes and objects named.

2. In a lantern having a single globe provided with a foraminated bottom, the combination, with such globe, of an air-chamber provided with ducts or channels arranged, substantially as shown, so as to receive or arrest air from the exterior of the globe and at a point at or near the base thereof, directing this air beneath the base of the burner-cone,

said ducts or channels communicating also with the flame-chamber exterior to the cone, the Whole being arranged so that air may be admitted to this flame-chamber either from the air-eharnber or from Without the lantern7 and so that the currents within the globe must be counter-balanced by reverse currents passing through the burner-cone, in the mauner and for the purposes set forth.

3. In a lantern having a single globe provided with a foranninated bottom, the combination, with said globe, of an air-chamber receiving air from the exterior of such globe at or near the base thereof, which air is directed beneath the base of the burner-cone, said airchamber also having a communication with the interior of the globe or dame-chamber beneath the base thereof and exterior to the cone, the inlets to the flame-chamber and to the air-chamber being relatively located and proportioned, substantially as explained, so

that the currents which pass down through the cone must be crossed and intercepted or otherwise counterbalanced by those Which pass down outside the cone and by others forced in from the lantern7 substantially as shown and described.

T11 testimony that I claim the foregoing I have hereunto set my hand in the presence ot' two Witnesses.

ARCHIBALD XV. PAULL. Witnesses:

WORTH Oseoon, SAML. C. MILLS.

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