US583624A

US583624A - Jule keen

Info

Publication number: US583624A
Authority: US
Publication date: 1897-06-01
Anticipated expiration: 1914-06-01

Description

(No Model.)

J. KE'EN.

MAGIC LANTERN.

No. 583,624. Patented June 1,1897.

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UNITED STATES PATENT GFEICE.

JULE KEEN, OF NEV YORK, N. Y.

MAGIC LANTERN.

SPECIFICATION forming part of Letters Patent No. 583,624, dated June 1, 1897.

Application led February 23,1897. Serial No. 624,560. (No model.)

To all whom it' may concern:

Be it known that I, .IULE KEEN, of New York city, county and State of New York, have invented an Improved Magic Lantern, of which the following is a specification.

This invention relates to a magic lantern or stereopticon adapted to be supplied with light by the ordinary illuminating-gas in lieu of by the oxyhydrogen light now usually employed. In thisv way the manipulation of the lantern is simplified and the cost accompanying lantern exhibitions is considerably lessened.

In the accompanying drawings, Figure lis a sectional side elevation on line l l, Fig. 2, of a double magic lantern embodying my invention. Fig. 2 is a horizontal section on line 2 2, Fig. l; and Fig. 3, a vertical transverse section on line 3 3, Fig. 2.

The letters a represent the light-holding boxes of the lanterns. These boxes are connected in front to the lens-tubes o, adapted to receive the slides c, and at the rear to the tubular extensions d, which, however, may

be dispensed with. The upper lantern may be tilted and focused by means of the hinged support c and set-screw e' in the well-known manner. Vithin each of the boxes a there is placed a gas-burnerf, which receives its supply of gas through tube f', two-way cock f2, and connection fa from the gas-main of a building. Each of the burners fis provided with an incandescent mantle g, placed in alinement with the -lens-tube b and radiating a light which will brilliantly illuminate the imageon the screen.

The heat of the incandescent mantle and of the products of combustion escaping from the burner would, however, be apt to inj uriously effect the lantern if the latter were exposed to the action of the same. In order, therefore, to adapt the lantern for the reception of this light, I surround the mantle g by an opaque non-conducting chimney 7i, composed, preferably, of a wooden shell having an asbestos lining or jacket 71,. This chimney is provided with a lens h2 opposite the lens-tube b, through which the light is emitted without, however, permitting the escape of heat. The heat of the mantle is iu this way confined within the chimney, while the prod* ucts` of combustion rise through the same and escape out of lateral openings c of box c. In order to protect the boxes from the effects of these escaping products of combustion, the walls of the boxes are lined with an asbestos layer or jacket e', which in this way coperates with the non-conducting chimney to thoroughly protect the lantern from the effects of the heat.

It will be seen that by my invention I am enabled to obtain a brilliant illuminating effect for magic lanterns by means of an ordinary gas-jet, and that in this way the ma-F nipulation of the lantern is greatly simplified and the expense connected with displays is reduced. Furthermore, the field of utility of the lantern is considerably enlarged, as it no longer requires skilled exhibitors and complicated light-generators to produce the brilliant illumination which is necessary to throw perfect images upon the screen.

Of course the invention may be applied to single'lanterns as well as to the double lantern illustrated in the drawings.

Vhat I claim isl. In a magic lantern the combination of a lens-tube with a box, a gas-burner within the.

box, a surrounding incandescent mantle, an opaquenon-conducting chimney surrounding the mantle, and a lens within said chimney which is in alinement with the Ienstube, substantially as specified.

2. In a magic lantern the combination of a lens-tube with an asbestos-lined box, a gasburner within the box, a surrounding incandescent mantle, an opaque asbestos-lined chimney surrounding the mantle, and a lens within said chimney which is in alinement with thelens-tube, substantially as specified.

JULE KEEN.

W'itnesses:

F. v. BRIEsEN, WILLIAM SCHULZ.