US1088030A

US1088030A - Enlarging attachment for cameras.

Info

Publication number: US1088030A
Application number: US73866812A
Authority: US
Inventors: Charles Carley Leeds
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-12-26
Filing date: 1912-12-26
Publication date: 1914-02-24
Anticipated expiration: 1931-02-24

Description

0. 0. LEEDS.

ENLARGING ATTACHMENT FOR CAMERAS.

APPLIGATION FILED DE(L26,1912.

Patented Feb. 24, 1914.

M a I a W 9 INVENT R 58 Co ver f f largements may is in the shape or a box embodying CHARLES CARLEY LEEDS, OF PITTSBURGH, PENNSYLVANIA.

nnnaneme ATTACHMENT FOR CAMERAS;

Specificationof Letters Patent.

Patented Feb. 24, 1914.

Application filed December 26, 1912. Serial No. 738,668.

To all whom it may concern:

Be it known that 1, CHARLES CARLEY LEEDS, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invcnteda new and useful Improvement in Enlarging Attachments for Cameras, of which the following a specification.

This invention relates to an enlarging attachment for cameras.

The object of the invention is to provide simple and improved means whereby encamera and lens, directly from photographic negatives or films, either in ordinary daylight or with artificial light, Without the use of a specially arranged dark room.

A further object of the invention is to provide an enlarging attachment for cameras which is simple and inexpensive and may be readily f lded or collapsed into compact form for storage or transportation.

The invention comprises the construction and arrangement of parts l'iereinafter described and claimed.

In. the drawings Figure 1 represents a per spective view of an enlarging attachment the invention, and showing same with a camera arranged in position on the frame; Fig. 2 is a longitudinal section, taken on the line 2-2, Fig. 1, the camera being omitted; Fig. view of the negative holder; and Fig. 4. is a detail cross sectional view showing a modification.

-The enlarging attachment comprises a one portion of which or container 1, which may be made of any suitable size, proportions or materialyand into which the parts of the enlarging attachn'lent can be folded when the sameis to be stored. Hinged to one edge of the open end of said box, as at 2, are a pair of bars or rods 3, rigidly connected at their outer ends by a strap or straps 4, preferably formed of thin sheet metal and nailed or. tacked to the ends of the bars. Said straps form guides between which travels a frame or base member comprising side bars 5 and end bars 6 rigidly connecting the same. The width of this base or frame member is suitable frame or base,

slightly less 'ljll?1il'-tll0(llStlIHCQ between the in collaps ng be made with an ordinary heights, the side legs 3 is a detail cross sectional bars 3, so that the outer frame member can be telescoped into the hinged frame member or folding theenlarging at tachment. Preferably, the inner end of either or both of the side bars 5 may be provided with a suitable stop 3 to engage the straps 4 and limit the outward movement of the bars. Rigidly secured to the outer end of the outer frame or base member are a pair of side standards or supports? slotted as at 8 to receive clamping bolts or screws 9 for adj ustably securing thereto, at different 10 of a table 11, upon the upper flat surface of which is placedthe camera 12.

The

side bars

3 and 5, are provided with sockets 0r seats 12, in which maybe removably secured, as by screws 13, the feet 14 of uprights 15, having hooks ends. Uprights 15 are hinged intermediate their ends, as at 17, and the upper members thereof are provided with edge lugs or projections 18, arranged, when the uprights are opened, to engage the edges of the lower members, so as to maintain the upper and lower members in alinement with each other;-

The rear or outer end ofthe box 1 of the frame is normally open, butis )rovided'with grooves or ways 19 along its edges to receive a sliding ter is indicated in cross section in Fig. 2 and its general features are the same as those of the ordinary printing out frame. That is to say, it is provided with an inner flange 21' to receive the edges of a transparent sheet or wall 22, formed of glass or the like, and against which the sheet of sensitized paper which receives the light rays is placed and held by the usual removable hinged back 23. The frame also is preferably slotted at one end, at 24, and provided with side grooves or ways 25 to receive an opaqueslide or wall 25, which also forms a focusing screen, as will hereinafter appear. is on the other side of the transparent wall 22 from the sheet of sensitized paper and covers and protects the same from light rays except .when removed. It is preferably formedof' some material of light color, such as stifl white cardboard, paper, hard rubber or the like. Preferably, the edges of the slot or opening 24 are fitted with thin strips of This opaque wall paper holding frame 20. The latas will be readily understood.-

Secured at its outer end to, the innerwall of thebox 1, as by strips 26; is a projecting member 27, having a projecting chamber 28 therein. Said member may be made of ri id material, such as wood, fiber, tin, orot er metal, but preferably is made of some flexi-.

ble material, such as cloth or other fabric or leather. The :projecting member will be made of rigid material, when a considerable number of enlargements are to-be made with the same camera and where the focal dis--- tance in the projecting chamber does not vary materially. It is made, however, of flexible material, such as fabric or leather, when ditferent enlargements must be made under different conditions, requiring adjust ment of or flexibility in the projecting member. The projecting member 27, in the form shown in the drawings, is made of some opaque fabric which is thoroughly light-tight, and which is provided on its outer surface with rings or loops 29, adapted to be caught over the hook 16 on uprights 15 to support said member. The projecting member is conical in shape, but may be made of the form of the ordinary leather bellows of a camera, and its reduced end is provided with a flexible band 30 formed, for example, of rubber, which is arranged to be sprung or stretched over the lens and shutter of the camera 12, as indirated in the drawings.

Camera 12 may be of any preferred type, but preferably is provided with the usual extensible bellows 31, forming a light-tight chamber therein, and with a longitudinally adjustable lens frame 32, the position of which may be adjusted for focusing by a screw 33, as is usual. At the rear of the camera is the usual spring-actuated ground glass frame 34., in front of which may be inserted a negative holder 35. This is of the usual typeof ordinary glass plate holder,

except that the partition separatingthe opposite sides thereof is cut out at the center, merely leaving edge strips 36, which form shoulders against which the glass negative is placed, and which in enlarging, form a mask for producing an even border for the picture. Said negative holder is provided with the usual slide or cover 37.

Preferably, the box 1 is provided with a suitable cover or door 38, hinged at one edge thereof, as at 39, and'which is arranged to inclose all'the parts of the apparatus when folded.

The apparatus is used in the following manner The apparatus being opened out and the parts arranged as in Fig. 1, camera 12 is placed in position on the table 11 and this is adjusted to the proper level, according-to the size of the camera or whether'the latter is placed on its side or end. The reduced elastic end 30' of the projecting mem her is then slipped over the shutter of the camera to prevent the admission of any light into the chamber 28 except that coming through the camera'lens- The negative to be enlarged, in its holding frame .35, is then inserted into position in front of the ground glass 34 of the camera. The: paper holding frame 20, previously loaded with sensitizedpaper and with the screen 25 therein, is slid into position in the rear end of the box or frame 1-. The projecting member 27 is preferably provided with a peep-hole or sighting aperture 40, through which the screen 25 may be viewed from the outside thereof.

This aperture is ordinarily closed by a flap or door 41 of any preferred type. The cover 41 of the peep-hole is lifted and the shutter of the camera is opened, when light will pass through the ground glass 34, which difluses the same, then through the negative and through the lens of the camera and'to the chamber 28 within the projecting member 27. By operating the adjusting screw 33, the lens frame 32, and the lens carried thereby, are then moved until the image on the negative is clearly focused upon the screen 25, as seen through the peep-hole 40. The shutter is then closed and the screen 25 is withdrawn fromthe end of the aper holder. The shutter of the camera is t en operated to give the desired exposure and to permit the image to be received by the sensitized paper; This may be accomplished by op erating the shutter lever'through the flexible material as shown at 27, Fig. 4 of the projecting member, but if the member 27 is of rigid material it may be provided at its smaller end with a shortsleeve 44 of flexible material having an elastic band 30* fitting over the shutter case 12 and through which ment, the camera is removed and the rings.

29 taken off from the hooks 16. The uprights 15 are next removed from the base members and 5 and the flexible member 27 is collapsed into the box. 1, and the uprights placed therein. The table 11 is next adjusted to its lowestposition and the supporting member 5 is telescoped inwardly toward the box' 1,. and when in its innermost position the bars 3 are folded inwardly on the hinges 2 into the frame. The cover 38 can then be swung around to close, the box and protect all the parts therein.

In case a glass negative of the enlargement is desired, an unexposed plate is substitiited for the transparent Wall 22 and the operation of enlarging is carried out as before described.

The enlarging attachment described is simple and inexpensive and permits of the production of enlargements without a specially prepared dark room. While the sen sitized paper must he placed inithe holding frame in a dark room and the developing and fixing also done there, the printing or enlarging may be done in an openroom by means of either an artificial or natural light, or may be done out of doors, ifdesired,

hat I claim is:

1. An enlarging attachment for cameras, homprising a frame, a light-tight projecting member supported thereby and having a chamber therein, and a sensitized paperholder supported by said frame in position to close one end of said chamber with the paper forming an end wall therefor, the other end of said member being arranged to fit over and inclose the shutter of a camera, said projecting member bcing provided With a peep-hole, whereby the image may be focused upon a screen in said paper-holder. An enlarging attachment for cameras, cinnprising a box or container, an extensible supporting member hinged thereto, a lighttight extensible projecting.member scoured to said box and having a chamber therein, means for supporting said projecting member and a sensitized paper-holder supported by said box in position to close one end of said chamber with the paper forming an end wall therefor, the other end of said extensible projecting member being arranged to fit over and inclose the shutter of a camera, said paper-holder being arranged to support an opaque screen, and said projecting member having a sighting opening whereby the projected image may be focused upon said screen.

3. An enlarging attachment for cameras, comprising a box like frame, supporting members hingedly connected thereto, a lighttight projecting member having a chamber therein, means for supporting said projecting member and a sensitized papt-ir-holder rcmovably secured in the open end of said box-like frame in position to close one end of said chamber with the paper forming an end wall therefor, the other end of said member being arranged to fit over and in close the shutter of a camera, said projecting memlu-r being formed of flexible material, whereby the camera shutter may be manipulated through the wall of said projccting member from the outside thereof.

4. An enlarging attachment. for cameras, comprisii'ig a frame, a light-tight projecting member supported thereby and having a chamber therein, a sensitized paper-holder removabl y secured in said frame in position to close one end of said chamber with the paper forming an end wall therefor, and a table or support carried by said frame and arranged ,to loosely support a emnera, the

othereml ofsaid projectingmember being.

5. n renlarging attachment for amc-ras,1' comprising a f1 a|n c,'a,lightetight pro ect ng thereby and having a 1;;

member supported chamber therein, a sensitized paper-holder rcmovably supported in said frame in position to close one end of said chamber with the paper forming an end wall therefor, a camera and a table or support vertically adjustable on said frame and arranged to loosely support said. camera thereomthe other end of said projecting member being arranged to fit over and inclose the shutter of a camera, means for adjusting the lens of said camera to focus the same, and means whereby the projected image may be seen to bring the same into focus.

(3. An enlarging attachn'ient for cameras, comprising a frame, a light-tight projecting member supported thereby and having a chamber therein, a sensitized paper-holder removably supported by said l'ran'ie' in position to closoone end of said chamber with the paper forming an end wall therefor,'the other end of said member being arranged to lit over the shutter of a camera, said paperholder comprising a finale, a trzmsparent wall therein, removable means for clamping a sheet of paper against one side of said wall, and an opaque wall or screen on the other side of said transjmrcnt wall and rell'lOYtllJlG from said frame.

7. An enlarging attachn'ient for cameras, comprising a frame, a light-tight projecting member silp iortcd thereby and having'a chamber therein, a sensitized 'j'zapcr-l'iolder remoa'ably supported by said frame in position to close one end of said chamber with the paper forming an end wall therefor, the other end of said member being arranged to [it over the shutter of a cal'nera, said paper-lmlder com nisii-ig a frame, a trans- 1i parent wall therein, and rcmm able means for clamping a sheet of paper against one side of said wall, said frame being slotted at one end and provided with ways to re -cei\'o an opaque slide on the other side of said t'ansparcnt wall, said slide being rcmovable from said frame t expose said paper.

R. an enlarging zttacluncnt for cameras, comprising a frame, a light tight member Sll]')})l)lll(.tl thereby and having a chamber therein, a sensitized paper-holder removably supported. by said frame in poprojecting Iv be seen and brought to exposure of the SGIlSLlZlZCtl,

llO

sition to close one end of said. chamber with jeeting member being provided with an apthe paper forming an end Wall therefor, erture ,through which the projected image the other .end of said member being aron said opaque wall may be seen, and means ranged to fit over theshutter of the camera, for covering and uncovering said aperture.

5 said paper-holder comprising a frame, a In testimony whereof, I have hereunto set 15 transparent wall therein, removable means my hand. 1

for clamping a sheet of paper against one OFIARLES CARLEY LEEDS. side of said wall, an opaque wall or screen Witnesses:

onthe other side of said transparent wall ELBER'T L. HYDE,

and removable from said frame, saidpro- WM. P. LARKIN.