US450475A

US450475A - Photographic cabinet

Info

Publication number: US450475A
Authority: US
Publication date: 1891-04-14
Anticipated expiration: 1908-04-14

Description

(No Model.) 2 Sheets-Sheet 1.

o. QUARTLEY. PHOTOGRAPHIG CABINET.

No. 450,475. A Patented Apr. 14,1891.

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PHOTOGRAPH() CABINET. No. 450,475.

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UNITED STATES PATENT OEEIcE.

CHARLES QUARTLEY, OF BALTIMORE, MARYLAND.

PHOTOGRAPHIC CABINET.

SPECFCATION forming part of Letters Patent No. 450,475, dated April 14, 1891.

Application filed Tune Z4, 1890. Serial Nc. 356,573. (No model.)

To @ZZ whom, it may concern:

Be it known that I, CHi-iELEs QUrinfrLEv, a subject of the Queen of Great Britain, residing at Baltimore, in the State of Maryland, have invented certain new and useful lmprovements in Photographic Cabinets, of which the following is a specification, reference being had therein to the accompanying drawings.

This improvement relates to an apparatus more particularly adapted to the process known to the photographic profession as bromide enlargement; but parts of it may be usefully employed for other purposes. Heretofore this class of work necessitated the setting apart of a special room of considerable size from which every ray of white light had to be excluded except through one small aperture for the reception of the negative to be enlarged, and through which the image was reliected on the enlarging tablet or screen. By myimproved cabinet the same results may be accomplished in the open air, under a skylight, or any place having an unobstructed top light, the development, of course, being carried on in a dark-room the same as for all sensitive plates or papers.

In the accompanying drawings,which show what I now consider to be the preferable way 4of carrying out my improvement, Figure l is a central vertical section of a cabinet constructed according to my improvement. Fig. 2 is a perspective view of the same. Fig. 3 is a similar view of a folding cap to the base detached. Figs. 4c and e show similar views of the plain sections of the adjustable extensible tube detached. Figis a similar view of the lens-section detacl'ied, with the frame of the section iu dotted lines to more clearly show the remainder. Fig` 6 is a similar view of the top section with negative resting thereon, detached. Fig. 7 is asimilarview of avignetting device detached. Fig. S is another central vertical section of the lens-section from another point of view and on a larger scale, showing more clearly the construction of the adjusting device. Fig. 9 is an elevation with one side of the base removed, showing the entire cabinet packed in the base for transporta` tion or storage.

Referring now to the details of the drawings by letter, A A represent an oblong base,

preferably of light wood-work, although other material may be used, on which rests an inclined cap B, whose lower end sets in a rabbeted frame a, fitted or attached to'the base A. Above this cap is a preferably rectangular tube C, made up of plain box-sections c c c of different depths, alens-section c', and a negativeholder orsection c. Each of these sections c c c c has a rabbeted bottom, as shown in Figs. l and t, adapted to fit in the one next below it, making a tight light-proof joint, and are made to be interchangeable in position, so that byarranging them in different positions the relative distances between the negative resting on the top section, the lens, and a tablet in the bottom of the base may be varied at will, so as to enlarge theimage on the negative to any requiredA size on the exposed paper on said tablet.

Having thus given a generaldescription of my apparatus, l will now refer to the more minute details.

The base comprises two parts A and A' of unequal depths, connected by a rabbet-ed joint a', and the upper one A havingl a rabbeted frame a to receive the lower edges of the cap B. The lower part A contains a tablet E, having wedges e fastened beneath the same. Resting on the bottom of the base are other wedges c', which are connected together bya rod F,having one end projecting through the side of the part A, on which end is a knob f. These parts are so arranged that by pulling on the knob f the wedges e pass under the wedges c and raise the tablet E, while a reverse movement (after the tablet has been raised) will lower the saine. Above the tablet isa slide G, the upper side of which is made white, the better to observe the image thrown down by the lens from the negative.

The cap,for convenience of transportation or storage, l prefer to make of binders board and with folded ends Z) adapted to fold inward, as shown in dotted lines in Fig. 3, so that it can be folded close together, as shown at B in Fig. l). At one end of the cap are two openings b Z2', through which the image thrown on the slide G by the lens may be seen, which openings must be provided with covers to prevent access of light when the sensitive paper is being exposed.

The lens-section c is provided with a fine IOO focusing device, (best shown in Figs. and 8,) comprising separate pieces of cord, catgut, or other suitable material, which pass th rough it at the four corners. Two of these pieces J J are attached directly to the focusing-rod 7e immediately above them, one at each end of it, (see Fig. 5,) while the other two pieces J J on the opposite side of the tablet are first passed over the tablet to the focusing-rod 7a and then attached thereto at a sufficient dis- 1 tance apart to prevent any interference with each other, and before making them fast permanently it is necessary that the tablet 'shall have been made to hang level. The action of revolving` the milled head K to the right will raise the tablet as high as the bellows H will allow it to go, and the pawl k will hold it in position, while a reverse movement will lower it by its own weight, by which means any desired focus can be obtained, and the tablet I fixed in that position by the pawl 7i; pressing against the milled head K.

The bellows H is attached at its top to the under side ofV the tablet I, while the bottom is made fast to the fixed frame L at the base.

The tablet I has an oblong openingi, (shown in dotted lines in Fig. 5,) which is covered by a slide M, carrying the lens tube N, at the bottom of which maybe set the vignettingdevice, (see Fig. 7,) consisting of a ring O tightly fitting on the bottom of the lens-tube and having spring-wire arms o, which carry the vignetter P, having an opening p, through which the light passes so as to reflect only that portion of the picture desired to be produced. The spring arms allow of the Vignetter being set in any desired position for condensing or expanding the light.

In the side of each of the larger sections, except the lens-section, is an opening Q, (see Fig. 4,) through which the lens-tube or vig- Vnetter may be moved, as desired, from left to right, as shown in Fig. 5, which opening may be closed by the sliding doors R. (Shown partly in dotted lines in Fig. 4.)

The upper section or negative-holder c is provided with a kit S, which slides in grooves in the ends of the upper section,

-which kit receives the negative T, and by means of which it can be adjusted from back to front of said section.

The operation is as follows: y The sensitive paper is placed on the tablet E when in its lowest position, and is protected from exposure by the slide G, and then the upper part of the base Aand the cap Bis set in position, and as many of the sections cas it is thought to be necessary are placed above them, over which is placed the. lens-section c', and then more sections c (generally the shallowest) are put over the lens-section, and above all is placed the negative or top section c, having the kit S, on which is placed the negative T. The image is then examined through the openings in the cap, and if it appears to be of the desired size it is properly centered by moving the lens from right to left, or vthe kit S backward or forward until the right position is obtained. If the size of the image is not exactly correct, it may be modified by changing the .positions of the sections or removing some of them entirely. For instance, if the image is too large, one of the sections between the lens-section and the cap may be removed. If too small now, one of the shallow boxes may be placed between the lenssection and cap. Changes mayalso be made by varying the distance between the top and lens sections by removing one or more of the sections between them. By thus varying the relative distances between the negative, the lens, and the slide G, any desired size of image may be shown upon the latter. After the general focusing has beenobtained the tine focusing for sharpness may be readily done by moving the lens-tablet up or down by turning the milled head K. When the desired sizeof image is obtained on the White slide G and has been tine-focused by the aid of the mechanism of the lens-section, any opaque covering is laid on or over the negative, or a pneumatic or other shutter used to exclude all light from entering the cabinet,

and the openings b b', Figs. 2 and 3, are closed. The slide G, which received the image, must be withdrawn and the rod F pulled out until the wedges e e, Figs. l and 9, raise the sensitive paper attached to the tablet E (which has hitherto been protected from the action of the light by the slide G) until it takes the same position or distance previously occupied by the slide G. An exposure of a few seconds by the removal of the opaque cloth or opening of the shutter is all that is necessary, when the rod F is pushed back, which will drop the paper and tablet in their original position and the slide can be replaced, the whole upper portion of the cabinet above the rabbeted joint c', Fig. 1,be lifted off, and t-he lowerportion with the slide and ysensitive and exposed paper .be removed to the darkroom and developed in the usual way. After the sensitive.paper has been developed, if no further present use is to be made of the cabinet, all the parts above the base A A may be set inside of said base, as shown in Fig. 9, and in this state stored away until again wanted for use. For convenience of transportation or to keep the dust out when stored, I prefer to provide the part A with a cover A, which may be hinged thereto; but this forms no part of the operative device.

While I prefer as a matter of economy to make the sections of the tube, base, dac., of wood, I do not limit myself to this, as it is evident that these parts may be made of metal, or even of heavy paper or straw board. Having thus shown one way of carrying out my invention, but without limiting myself to the exact construction shown, I claim as newl. In al photographic cabinet, the interchangeable sections for varying the relative dist-ance between the lens and the sensitivepaper holder, substantially as described.

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2. In a photographic cabinet, the inter- .changeable sections between the lens and thc negative-holder, substantially as described.

3. In a photographic cabinet, and in combination with a lens and a base, as A A', a series of interchangeable sections between the lens and said base.

l. In a photographic cabinet, the combination, with a base, as AA' and a lens, of a tapering cover B, and a vertical tube C, carrying the lens and the negative-holder, subst-antially as described.

5. In a photographic cabinet, the combination, with a base, as A A', and a lens, ot a taperlng` `folding cover B, and a vertical tube C, carrying the lens and the negative-holder, substantially as described.

6. In a photographic cabinet, tlie combination of a base A A', the cover B, having openings b ZJ', and avertical tube C, carrying the lens and negative-holder, substantially as described.

7 In a photographic cabinet, the combination ot the two-part base A A', the slide G, and adjustable tablet E, contained in said part A, a tapering cap B, and a vertical tube C, carrying the lens and negative-holder, substantially as described.

8. In a photographic cabinet, the combination of the two-part base A A', the slide G, and adjustable tablet E, contained in said part A, the tapering cap B, and the vertical tube C, made up of sections c c' c, substantially as described. u

9. In a photographic cabinet, the combination, with a tablet E, having Wedges c, of the adjustable Wedges e' e', substantially as described.

l0. In a photographic cabinet, the combination, with a lens, of a support for the same, as the tablet I, and means, as the rod 7c' and cords J J', for raising and lowering the lenssupport, substantially as described.

ll. In a photographic cabinet, the combination, with a lens, of a tablet I, carrying the lens, the cords J J', the rod 7c', the milled head K, and the pawl 7.; for securing the lens in the desired position, substantially as described.

l2. In a photographic cabinet, the vignetting device consisting of a ring O and springarins o for carrying the vinnetter P, having opening p, substantially as described.

13. In a photographic cabinet, the lens-section herein shown and described, comprising a frame, an adjustable tablet having an open ing for the lens, a bellows connectedY to the tablet and frame, a slide I, covering the opening in said tablet, and a lens supported by said plate, substantially as described.

14. In aphotographic cabinet, the combination of the base A A', the folding cap B, the interchangeable sections c c, lens-sections c', and negative-sections c", all constructed and arranged as shown, whereby the parts above said base may be packed within the same, substantially as shown and described.

In testimony whereof I affix my signature, in presence of two Witnesses, this 21st day of June, i890.

CHARLES QUARTLEY.

Witnesses:

R. D. J oNEs, CAREY HALL.