US703421A - Camera attachment. - Google Patents

Description

No.v 703,421. Patented July I, |902.

J. L. JACKSON.

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+rl @will UNITED STATES PATENT OFFICE.

JAMES LOGAN JACKSON, OF VILLIAMSPORT, PENNSYLVANIA.

CAM ERA ATTACH M ENT.

SPECIFICATION-forming part of Letters Patent No. 703,421, dated J' uly 1, 1902.

Application filed October 25, 1901. Serial No. 79.952. (No model.)

To otZZ wto'm/A t may concern:

Be it known that I, JAMEs LOGAN JACK- sO N, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania, have invented a new and useful Camera Attachment, of which the following is a specification.

This invention relates to photographic cameras, and has for its object to provide for cutting 0E from the lens thereof reflected light from adjacent objects and to permit the direct light-rays only striking the lens, thereby to obtain a clear-cut impression uponthe sensitive member.

It is furthermore designed to arrange for applying the present device either directly to the lens-tube or to the front of the camera, as may be convenient or necessary, and to facilitate the application and removal thereof without interfering with any of the other parts of the camera or requiring any adjustment or rearrangement thereof.

Another object is to have the device collapsible, so that it may be folded into compact form for convenience in carrying` the device when not applied to the camera;

lVith these and other objects in view the pi'esentjinvention consists in the combination and arrangement 0f parts, as will be hereinafter more fully described, shown in the accompanying drawings,and particularly pointed outin the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure l is a perspective View showing the device applied to the front of a camera. Fig. 2 is a longitudinal sectional view of the device. Fig. 3 is a transverse sectional view taken on the line 3 3 of Fig. 2. Fig. i is a perspective view of the collapsible frame of the device. Fig. 5 is a detail perspective view of the fastening means employed-in the application of the device as illustrated in Fig. l. Fig. G is a detail View illustrating a modified form of fastening means for the device.

Like characters of reference designate corresponding parts in all the figures of the drawings.

ln photographic work, particularlyin making outdoor exposures, sensitive plates or members are often ruined or at least materially impaired bythe action of light reflected from adjacent objects which are not in the range of the lens, and to overcome this objection or difficulty I have designed to prevent reflected light from striking the lens by providing a flared tube l, formed of some dark material and having its smaller end constructed for connection with the front or lens-tube of a camera, so as to embrace the lens, the camera-box being illustrated at 2 in Figs. l, 2, and 3 of the drawings. By this means the reflected light-rays from adjacent objects are eifectually cut off and prevented from striking the lens and the direct lightrays only from the object to be photographed are capable of striking the lens, whereby a clear-cut impression is made upon the sensitive member of the camera. lt will here be noted that the essential feature of the present invention is to provide a shield which is open at opposite ends and embraces and projects forwardly from the lens so as to cutoff reflected light, the general shape of the shield being conical or flared outwardly, the manner of attaching the shield being of minor importance.

I prefer to have the shield collapsible, and therefore provide a frusto -helical frame 3, formed from a single length of wire and inclosed within a cover 4, of some dark textile fabric, whereby the device may be collapsed so as to lie entirely with-in the outer or larger end portion of the frame, whereby the shield may be conveniently carried in a pocket of the clothing or in a casing for carrying the camera-box.

For convenience in connecting the shield to a camera l have shown one form of attachment in Figs. 2 and 3 of the drawings, Where-- in the smaller end of the shield is provided with a metallic ring or collar 5, which is provided at diametrically opposite points with outwardly-directed reversely-disposed hooks 6 for engagement with headed pins or projections 7, provided upon the front of the camera and at opposite sides of thelens-tube, whereby the shield may be conveniently applied to the camera and also readily removed therefrom without affecting the lens or re- ICO quiring any adjustment or rearrangement of parts of the camera.

In some cases-as, for instance, Where the lens-tube projects at a sufficient distance in front of the camera-the smaller end of the frusto helical frame may be snapped or sprung upon the projected end of the lenstube, thereby requiring no additional fastenings for supporting the shield upon the camera.

Another form of attachment has been shown in Fig. 6, wherein the smaller end of the shield is provided with a split ring or clamp 8, havingits opposite ends provided with outwardlydirected ears 9, Which are pierced by a setscreW lO, the clamp being` designed to embrace the projected end of a lens-tube and to be firmly held thereon by adjustment of the set-screw.

From the foregoing description it is apparent that the present invention is essentially in the nature of an attachment to cameras and is not restricted to any particular type of camera nor to outdoor Work alone, as it may be used for interior Work Whenever required, according to the judgment of the operator.

Furthermore, it is not essentialthat the device be collapsible, nor is it essential that the shape thereof be conical, as illustrated in the drawings, for it may be polygonal instead of circular in cross-section, although the frustoconical shape is preferred as being the most successful embodiment of lthe invention.

lVhat I claim isl. As a new article of manufacture, a collapsible frusto-helicalwire frame, and a -Ilexible cover carried by and embracing the periphery of the frame, the opposite ends of the article being open.

2. A device for excluding reflected light from the lenses of cameras, comprising a tapered and collapsible tube formed of lightexcluding material, the opposite ends of the device being open.

3. A device for excluding reiiected light from the lenses of cameras, comprising a tube formed by a collapsible frusto-helical frame, and a iexible light-excluding cover therefor, the opposite ends of the device being open.

4. A device for excluding reflected light from the lenses of cameras, comprising a tube formed by a collapsible frusto-helical frame, a flexible light-excluding cover therefor, and attaching means carried by the smaller end of the device, the opposite ends of the device being open.

5. As a new article of manufacture,a IieXible truste-helical wire frame, a flexible cover carried by and embracing the periphery of the frame, the opposite ends of the article be ing open, and means carried by the smaller end ofthe article for mounting the same upon a support Without obstructing the open end thereof.

In testimony that I claim the foregoing as my oWn I have hereto affixed my signature in the presence of two Witnesses.

JAMES LOGAN JACKSON.

Witnesses:

G. Huss, 0. P. llnniTi-IUT.

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