US887928A - Projection-lantern. - Google Patents

Description

JNVENTOR.

PATENTBD MAY 19, 1908.

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G. I. DUTTON,SJR. PROJECTION LANTERN. APPLICATION FILED mm a 1905 WITNESSES:

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GEARLES F. BUTTON, JR, OF CLEVELAND, OHIO.

Specification of Letters Patent.

ANTE RN.

Patented May 19, 1908.

Application filed March 6, 1905. Serial No. 248.422.

State of Ohio, have invented certain new and useful Improvements in Projection-Lanterns, and do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same. j

My invention relates to improvements in projection lanterns and the improvement consists in the construction and combinatioh of parts substantiallyas herein shown and more particularly pointed out in the claims." I

()ne of the objects of my improvement is embodied in the means for detachably and yieldin'gly supporting each. condensing lens within the lantern body or cylinder.

Another object is embraced inthe mounting for the slide carrier and the front oondenser lens and whereby said carrier may be rotated in a plane at right angles to the optical axis and adapting both carrier and lens to be removed together from the lantern body.

A further object is provided for in the construction of the base board and the slidable supports for the objective lens mounting and for the lantern body and whereby adjustmerit and locking of said parts is readily obtained and fixed.

metallic cylinderhopen at Further objects are also ershodied in the construction of the base board and provision therein for the movement-of the are light carbons, and also in means for supporting other slides and upon the slide carrier.

In the accompanying drawings Figure l is a central longitudinal sectional view of my i proved lantern with the objective lens mounting in side elevation. Fig. 2 is across section on line y, g, Fig. 1 looking to the rear and showing the slide carrier rotatably mounted upon the main lantern body. Fig. 3 is a sectional view of the slide carrier and its sup ortwith the lens removed and at one side. ig. 4 is a cross section o'i'the lantern body at r, m, Fig. lo-looking to the front, and Fig. 5 is a perspective view of the sliding lamp or objective lens support showing thefriction spring thereon.

Themain body oi the lantern. comprises it its a thus permitted to escapefat the to ads and sup ported by legs 2 secured to base board B. A bed plate C is adapted to slide upon base board B and to this end said board B is grooved and undercut at 3 its full length at each side and bed plate C has a rabbeted edge 4 at one side and also a bow shaped spring 5 at its opposite side engaged in the opposite under-cut portions Spring 5 serves to lock and hold plate C in any adjusted position and also takes up all wear as well as to provide for freedom of movement of the plate regardless of shrinkage of the wood.

An electric arc'light D or other suitable lighting apparatus is mounted upon slidal -e bed plate C. As shown, carbons 6 and 7 are supported by adjustable brackets 9 and 8, re-

spectively, which are jointly actuated and operated by hand screw 10 geared to vertical screw 11. A screen or plate 12 screens the it-at the rear of the lantern. is slotted or open at its bottom at 13 to per 'mit forward or haclrward lXlOVBiRQllt of the lighting apparatus within cylinder A, and base board B is also slotted at c to rovidc iorfree movement of carbon Cylinder A is-also open at itsjtop, a portion being cut away and side walls 14 at each side bent back and perforated to provide'an open support for a roof or cover lfi which is preferably lined upon its inside with asbestos or like material a. The main portion of the heat generated by the lighting apparatus is of the cylinder although other openings a so permit egress of the heat.

spectively, are located at the front and within the end of cylinder A and are separately supported and also removable from their re' spective supports. Thus, lens E is held in p acejby a set of spring all s 16, three in number arranged ano riveted at equal distances apart and within and upon cylinder A and said lens is of less diameter than the inner diameter of' cylinder A thereby leaving a free space all around the lens for the circulat1on of air which enters throughthe circular rowof openings 17 in the wall of the cylinder.

, Clips 16 have angular-1y bent'iree ends to engage and hold the edge of the lens and are adapted to spring baclr. to permit the lens to be removed. The spring support obtained by this arrangement permits lens E .to be removed at any time and allowsfor all ex ansion and contraction of the lens and b0 y A without in any Wise endangering the lens or Cylinder A v altering its position centrally Within the cylinder. Lens F .is likewise supported. by means of like spring clip members 18 but in this case, said members and lens F are made a part of a removable end cap or thirnble 19 Which is adapted to fit snugly within the open end of cylinder A and is held in locked relation thereto by means of spring clamps 20 on cylinder body Although clamps 20 hold thimble 19 in place, nevertheless said thinible is removable and is also rotatable in its seat to permit a rotary adjustment of slide carrier G which is mounted upon the front face of the thimble. Thus, carrier G is -rernovable with thimble 19, and lens F is larger sized slide carrier or other slides or ob- ,jects too large lit carrier-G, I mountthe same at the front of carrier G and to this end "provide projecting pins 22 upon which the same may rest. At-the front of cylinder A and axially in line therewith is the objective lens mounting H having a cylindrical hood 23 attached thereto and projecting toward the rear. A slid ing H and hood able support 24 for mountis'mountedand adapted "to slide back and forth upon base board B in the same. manner as bed plate C, and is adapted to be shiftedto bring the objective lenses, and condensing lenses in the right relation.

. 'What' i claim is l 1-. In a-projection lantern, a cylindrical lantern body and a condensing lens removably mounted therein apartfrom said body about its edge, and saidbcdyhaving openings opposite aid. lens, in combination withacap reniovably mounted on said body and a detaehab'le lens therein apart from. the wall thereof.

In a projection lantern, a

' I I cylindrical carrier G is slotted lengtlnv and hold said outer lens.

'3. In a projection lantern, a cylindrical lantern body, a series of spring clips mounted within said body at its front end, a condensing lens renrovably supported upon said clips,

a slide carrier and a support therefor rotatably mounted and detachably secured upon said lantern body, spring clips within said support, and a condensing lens reinovably mounted upon said. clips.

l. In a projection lantern, a cylindrical lantern body,' a set of condensing lenses mounted within one end of said body, a slide carrier supported at the front of said lenses, and forwardlyprojectingpins upon said slide carrier adapted to support larger slides or other objects.

In a projection lantern, a lantern body and condensing lenses therefor, a supporting base for said body, a grooved and abbeted portion lengthwise of said base, a slidable plate having a rabbeted edge at one side and a s ring upon the other side ada )ted to fit wit in said rabbeted portion of saic base, and a lighting device supported upon said slidable'plate, in combination with an objective lens mounting at the front of said lantern body and axially in line therewith.

.6. In a )rojection lantern, a cylindrical lantern body having an open top and an asbestos lined cover above the same and provided with a slot lengthwise of its bottom, condensing lenses mounted within said body at its front end, a supporting base for said body, an electric are light apparatus and a slidable base therefor mounted upon said base, a slot lengthwise of said base, an objec tive lens mounting at the front of said body, and a slidable support for said objective lens in oun. ting.

In testimony whereof I sign this'specificationin the presence of two Witnesses.

CHARLES F. DUTTON, JR. Witnesses R. B. Moses. 0. A. SELL.

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