US1139788A - Lantern. - Google Patents

Description

J. McDADE & F. F. DORSEY.

LANTERN.

APPLICATION FILED IAN. 22, 1915.

1,139,788. Patented May 18, 1915.

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tininn srnrns irnnisr erran EDWARD 3'. MGDABE AND FARNUM F. IDOBSEY, 6F NEW TUB-K, ASSIGNORS TO PRITGHARD-STAMPING- COMPANY?) OF ROCHESTER, NEW YORK, A CORPGRATION OF NEW YORK.

v LANTERN.

Specification of Letters Patent.

Patented inlay 18,1915,

Application filed January 22, 1915. Serial No. 3,817.

To all ill/20m it may concern Be it known that we, EDWARD J. MoDAon and FARNUM F. Donsny, citizens of the United States, and residents of'liochester, in the county of Monroe and State of New York, have invented certain new and useful Improvementsin'Lanterns, of which the following is a specification.

This invention relates to lanterns of the type commonly described asrailroadlanterns, in which the currents of air "and of the products of combustion through the globe are controlled by passages in the body and in the head or dome of thelantern, without the employment of air-tubes for equalizing the air-pressure at the top and bottom of the lantern. In lanterns of the type in question considerable difficulty has been encountered in properly controlling the air-currents within the globe in such manner as to insure a sufficient supply of air for proper combustion, while at the same time avoiding the danger of drafts such as may extinguish the flame under the exacting conditions of use. To control the indraft of air at the bottom of the globe it has been customary to mount the removable oil-font of the lantern in a hollow body-portion in the form of a shell or ring, this body being, for at least a part of its height, of sufficiently greater diameter than the oil-font to provide an annular air-space and being perforated for the admission ofair to this space. From the air-space in question the air has been delivered at, or adjacent to, the top of the coil-font through openings or passages of various forms more or less adapted to control and direct the air-currents. In lanterns of the type in question it is customary toemploy a globe of which the lower edge rests upon a horizontal flat seat or ledge at or near the top of the Ian tern-body, this globe-seat extending into proximity with the top of the oil-font. It has been proposed, as in the United States patent to Hamm, No. 910,673, to employ the globe-seat as means for regulatingthe inflow of air at the top of the oil-font, this result being accomplished by extending the globe-seat into engagement with the" oilfont and providing the globe-seat, at its inner margin with perforations for the passage of the air. This arrangement, however, causes the air-currents flowing through the perforations in question to be directed upthe top of the oil-font by arranging the oilfont with its top a short distance below the globe-seat, so that an annular space is provided between the upper angle or edge of the oil-font and the inner edge of the globe seat, but in this case the air-currents, while directed in a generally horizontal direction toward the burner are not equally distributed around the burner, but may prevail in one direction or the other according as the air is admitted in greater volume at one side or the other of the body owing to wind or' to the lateral movement of the lantern in signaling. 7 p v The object of the present'invention is to produce a lantern in which the inflow of air at the top of the oil-font shall be such'that the air is directed in the general direction of the flame of the lantern, but in which the flow of is equably distributed around the oil-font, so that the flame is subjected to no pronounced lateral draft in any direction. For the foregoing purpose we locate the globe-seat at a substantial distance above the top of the oil-font, and provide a sleeve eX- tending downwardly from the inner edge of the globe-seat and to a point below the top of the oil-font. This sleeve is provided with a series of perforations adjacent to the top of the oil-font, these perforations being sufficient in number and size to admit the necessary quantity of air, while at the same time the sleeve affords sul'licient obstruction to the fiow of air to causethis flow to be distributed substantially uniformly around the oil-font, so that under all conditions the air approaches the flame of the lantern substantially uniformly from all directions. Preferably, the diameter of the sleeve in question is somewhat greater than that of the oil-font, while its lower margin is'con air-currents passingthrough these openings to be broken up so as to result in a gentle i and diffused current of air toward the flame of the lantern.

The accompanying drawing is a vertical 7 sectional view of the lower part of a lantern embodying the present invention. r

The invention is'illustrated as embodied V in a lantern of a well-known general form,

this lantern' comprising .the usual sheet metal body 1 fixed in a wire frame or guard 2., The oil-font3 is of ordinary form, and is provided with the usual open. burner 4, such as is adapted for useiwith the heavier illuminating oils. The lower part 5 of the 7 body is ,contracted to fit the oil-font closely and retain the oil font against lateral movement, while the upper part of the body isof substantially greater diameter than the oil:

font so as'to provide an annular air-space 6." ingress of'air'tothis space is permitted by the usual perforations ,7 in the wall'of the body. w

' 'The globe-seat is embodied in an annular member of drawn sheet-metal, having a vertical portion 9 1'itting'clos ely within, and

secured to, the upper margin of the body,

and a fiat inwardly-extending horizontal portion 8 which provides asurface'upon which the lower edge of the globe rests the usual manner. r

The novel features of the present construction reside particularly in a sheet-meta] sleeve l0 which projectsdownwardly from the inner edge of the globeseat. This sleeve may be formedrand may be attachedto the globe-seat, in any convenient'manner, but it is preferably produced from the same blank r and bythe'same stamping or drawing oper ation by which the globe-seat is produced,

- o being thus an integral extension fromthe oil-font into the space above the oil-font,

'copies'of this patent may be obtained for inner-edge thereof: T hesleeve l0,'-as'shown,

extends for a short distance below the top ofthe oil-font, and is provided, at the bottom, with a contracted or inwardly-projectso thatthe air admitted to the air-space 6 through the opening? emerges into the lan vtern-globe throughtheholes 12 and in the general direction of the burner 4. c The im- 'Ypingeinent of apart of this air against the edge of the oilfont,however, causes the aircurrents to be more 'or lessbroken up and checked, while at the same time the obstruc-v tion of the space between the globe-seat and the oil-font by the sleeve 10 prevents the free flow of any pronounced lateral draft in the direction'of the burner. Accordingly, the burner is supplied with air from all directions equally in such a manner that the adverse conditions.

We claim:

1. In a lantern, the'combination, with an flame will burn very steadily under the most oil-font and; a body in which the oil-font is removably mounted, the bodybeing of substantially greater diameter than the oil-font so as to provide an annular air-chamber,

and having openings for the admissionof air to sa d chamber, and a flat imperforate ledge, constituting a globeseat, partly clos-i ing the" top of the body and located above the top of the oil-font; of a sleeve extending' downwardly, from the inner margin of the globe-seat, and close to the sides of the oil-font and provided with a series of perforations, located partly above and partly below the upper extremity of the oil-font, forthe admission ofair from said air-chambertothe space, above the oilfont.

2. Ina lantern, the combination, with an oil-font and a body in which the oil-font is removably mounted, the body being of sub-v stantially greater diameter g'than the oilfont so as to provide an annular air-cham b er, and'having openings for the admission of air to said chamber, and a flat imperforateledge, constituting a globe-seat, partly closing the top of the body and located above the top of the oil-font; ofa sleeve, or, substantially greater diameter than the oilfont, extending downwardly from the inner margin of the globe-seat, to a point below the top of the oil-font, and thence inwardly into close proximity to the oil-font, said ingabove' the top of the oilfont, for the admission of air from said air-chamber to the space above the oil-font.

- In testimony whereof we affix our signatures in presence of two witnesses.

EDWARD J. MODADE. I FARNUM F; DORSEY.

VVitnessesi i V L. THoN, D. GURNEE.

five. cents each by addressing h Commissionerof Patents,

Washington, D. (7. r i I sleeve having a series of perforations, open

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