US412511A - Vignetting-frame - Google Patents

Description

UNITED I STATES PATENT OFFICE.

JOHN M. KELLUM, OF KOKOMO, INDIANA.

VIGNETTING-FRAME.

SPECIFICATION forming part of Letters Application tiled February 8, 1889i To @ZZ whom it may concern:

Be it known that I, JOHN IWI. KELLUM, a citizen of the United States, residing at Kokomo, inthe county of Howard and State of Indiana, have invented certain new and useful Improvements in Vignetting-Frames, of which the following is a specification.

The object of my said invention is to provide a vignetting-frame especially designed for photographers use, which can be conveniently adjusted to any desired position on the printing-frame, and by the use of which the process is rendered very simple and inet pensive, as will be hereinafter more fully de scribed and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure l is a perspective view of a vignetting-rame embodying my said invention in position for use upon an ordinary printingdrame; Fig. 2, a central longitudinal section through the same on the dotted line 2 2 in Fig. 3, and Fig. 3 a cross-section on the dotted line 3 3 in Fig. 2.

In said drawings, the portions marked A represent the printingdranie; B, the main portion ot the vignettingframe; O, the sliding portion, and E a shade or light-softener for use when the light is too intense.

The printing-fra1ne A is of an ordinary construction, and needs no special description, except incidentally in describing my said invention. A negative A is shown in position for taking a print, and set-screws a are provided. centrally in each endv of the frame for the purpose of securing the frame I3 thereon, as will be presently described.

The frame B is a rectangular trame of substantially the same shape and size as the printing-frame with which it is to be used. It preferably consists of a piece of thin board having a central aperture arranged to be above the negative when in use. It is provided in each end or side with long transverse slots Z), through which the setserews a extend into the frame A and secure said frame B in the desired position. On opposite sides of the central aperture in the frame B are provided cleats B', which entend longitudi nally of said frame, and have two sets of grooves b and b2 in their adjacent sides, in

Patent No. 412,511, dated October 8, 1889.

Serial No. 299,157. (No model.)

which are mounted the sliding part C and the shade D, as will be presently described.

The sliding part O is any suitable card formed to tit between the cleats B and slide in the grooves h or b2, as maybe desired,and is provided with a central aperture of the shape and size desired, through which light is admitted to the printing-frame.

The shade E consists of an outer frame, formed to slide in one set of the grooves in the cleats I3', and a central portion of tissuepaper or similar substance, of such thickness or density as may be necessary.

The use of my invention is as follows: The negative from which a print is to be taken is arranged in the printing-frame in the well known manner. The vi gnetting-frame is then secured in position on the side of said frame, through which the light is admitted, by means of the slots and set-screws, as described. The sliding portion O, having an aperture of the desired size and fornuis then mounted in the grooves b in the cleats B', and the lframe adj usted to the exact position desired above the negative, which adjustment is permitted by means of the set-screws a and slots b, said frame being moved, as may be desired, either as a whole to one side or the other, or the opposite ends maybe slid in opposite directions, to bring the vignetting-frame into a diagonal position in the printing-frame, as indicated by dotted lines in Fig. l, and thus permit various effects to be produced easily and conveniently, lVhen the vignetting-franie has been adjusted to the desired position, the print is taken in the welhknown manner. When the light in which the exposureis made is too strong for the purpose, the shade E, the central portion of which is composed of paper or other substance of the desired density, is slid into position in the grooves b2, and the light thus modified as desireda To produce some effects, it is desired that the vignettingframe shall be at a greater distance from the negative than in others, and in such cases the sliding part C is withdrawn from the grooves b and mounted in the grooves b2, which achieves the desired result.

Having thus fully described my said inven tion, whatI claim as new, and desire to secure by Letters Patent,

l. A vignettingrame cousistin g oit the main IOC portion B, provided with a central aperture, the slides B on each side thereof, having the t-Wo sets of grooves b b2 formed therein, the sliding part C, mounted in 011e set of grooves, and the shade E, mounted in the other set, substantially as set forth.

2. The combination of the printing-frame A, the vignetting-frame B, provided with the transverse slot bin each end thereof, the setscrews a, one extending through each of said vslots into said printingframe, and the sliding part C, mounted in slides over an aperture in said vignetting-frame, substantially as set forth.

In witness whereof I have hereunto set my i 5 hand and seal, at Indianapolis, Indiana, this 4th day of February, A. D. 1889.

JOHN M. KELLUM. [11s.]

Witnesses:

H. GEORGE, E. W. BRADFORD.

Images