Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS434807 A
Publication typeGrant
Publication dateAug 19, 1890
Filing dateDec 19, 1889
Publication numberUS 434807 A, US 434807A, US-A-434807, US434807 A, US434807A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Photographic camera
US 434807 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

(No Model.) 4 Sheets-Sheet 1,


No. 434,807. Patented Aug. 19, 1890.

2 u e e h S S t e e h S 4 (No Model.)


ted Aug. 19,1890.

4 Sheets-Sheet 3[ (No Model.)


Patented A ug 12, 1890.

Jae 670% Zf/ LO 066a.

Witnesses 4 SheetsSheet 4.


(No Model.)

No. 434,807. Patented Aug. 19, 1890.-





SPECIFICATION forming part of Letters Patent No. 434,807, dated August 19, 1890.

Application filed December 19,1889. Serial No. 334,301. (No model.)

vention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form. a part of this specification.

My invention relates to certain new and useful improvements in photographic cameras.

The object of the invention is to provide a camera-box with a ground-glass holder hinged to a frame so that it can be reversed to bring the ground glass nearer to or farther away from the lens, the rear frame of the camera belng adapted to receive a second frame carrying the sensitized plates, the said second frame being made up of two parts hinged to each other, each half having shutters. The plate-holder is adapted by reason of its peculiar construction to receive either one large plate or two smaller ones and is reversible, by means of which construction I am enabled to take two prints without readjnsting the parts of the camera; and my invention consists in the construction and combination of the parts, as will be hereinafter fully set'forth,

and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of the ground-glass holder, showing the same attached to the camera-box. Fig. 2 is a perspective view showing the ground-glass frame removed and the plateh-older frame in position. Fig. 3 is a vertical sectional view showing one of the shutters open to expose the sensitized plate. Fig. 4 is a plan view of the partition-board of the plateholding frame. Fig. 5 is an end view of the same. Fig. 6 is a plan view of a modification of the plate-holding frame. Fig. 7 is a rear edge view of the ground-glass holder, and Fig. 8 is a detail view showing the interior arrangement of the ledge, recess, and blocks in the plate-holding frame.

The camera-box A is of the usual construction, therear frame B thereof carrying a rearwardly-projecting ledge B, having projecting pins 1). Centrally located upon the upper strip of the frame B is a spring-catch b, for engagement with the parts to be hereinafter described. To one edge of the frame B are secured hinges 19 having upwardly-projecting pintles, and these pintles are adapted to engage with the eyes or socket of the opposite leaf of the hinge, which is rigidly secured to the frame C, in which the ground-glass plate is mounted' The frame 0 is of considerable thickness, and near one side thereof the ground-glass plate is secured, so as to leave a considerable distance between the plate and opposite side of the frame, and consequently, in order to obtain the proper focus, it will be necessary to place the ground glass to correspond, so that it will occupy the same position relative to the lens as will be occupied by the sensitized plate. Therefore theleaves of the hinges secured to the frame are provided on each edge of the frame with sockets, so that the frame 0 can be reversed to position the ground-glass plate in the proper relative position. The frame B at its outer edge has a projecting strip which is adapted to lie in the correspondingly-recessed edge of the frame 0, so as to provide a tight joint, which will exclude all light.

The plate-holding frame D is made up of two sections D and D which arehinged to each other at the bottom, both sides of the frame having a marginal recess within which the projecting strips on the frame B will lie when the plate-holder is placed in position. This plate-holder frame is provided at the base of each section wit-h perforations in which the pins 1) will lie, while the upper edge of each section has a pin (1, with one of which will engage the spring-catchb. The sections D and D are held closed by hookv andeye (1. Each of the sections D D are provided with shutters E, which are adapted to close a central opening therein, and these shutters may be constructed substantially as shown in my application for patent, bearing Serial No. 314,925, or they mayconsist of a single plate hinged to the frames D D, the edges thereof being bent inwardly to engage with grooved all light from the sensitized plate.

metallic strips attached to the inner sides of the openings in these frames, the inwardlyturned edges 6 of the plate or shutter E being adapted to lie within the groove in the strips e when the plates are placed to exclude Each of the shutters are provided at their lower edge with a barf, which serves as a hinge for the shutters E, as well as the operating means therefor, and these bars f are bent at right angles and have secured thereto a plate f the end of which is grooved to engage with the end of a spring g, secured to the edge of the frames D and D and by means of the.

grooved plate, spring, and handle-bar the shutter will be held either opened or closed. One of the sections, preferably D, is provided adjacent to the central opening therein with a recess h, while the opposite frame D has a deeper-seated recess h, which is of about the thickness of an ordinary sensitized plate. Blocks 7L2 are secured to the corners of the frame D to reduce the depth of the recess h, so that a sensitized plate of full size or capacity of the camera can be held in the recess h either in a vertical or horizontal position, and when the full-size plate is used the turn-buttons h are used to retain said plate in place. Vhen a large plate is used, it will be found advantageous to place the frame 13 upon the frame D, so that the groundglass will be the same distance from the lens as the sensitized plate. The inner margin of the frames D and D are provided with a projecting portion and corresponding recess, so that a tight joint will be provided when they are closed.

As it is often desired to take photographs of less size than the extreme capacity of the camera, and also expose two plates in a single frame, I provide a partition-board I, which is adapted to be held in the recess h, the corners thereof resting upon the blocks k and this partition is provided on each side with adjustable means for holding the sensitized plates, and thus after securing the proper focus on the ground-glass plate it is removed and the frame D secured in its place and the front shutter opened to expose the plate when the cap is removed from the lens. The partition I is preferably provided with similarly-constructed plate-holders, and one of the essential features of these plate-holders is that they shall not only have a means for adjusting the same laterally, but also have means for adjusting the strips vertically or away from the partition. One form of plateholder consists of slotted corner pieces j, which are adjustable longitudinally or laterally by means of clamping-nuts which hold the slotted plates 3' by frictional contact upon the bolts and against the surface of the partition-board I. The ends of these plates j are upturned and provided with set-screws, the heads of which engage with slots in angular strips 70, beneath the overlapping edges of which the sensitized plate is placed. A central spring Z is provided to hold the sensitized plate against the projecting strips 75, and one of said strips has a spring m for forcing the sensitized plate against the opposite retaining-strip. Lateral or longitudinal adj ustments are made by loosening the nuts and moving the slotted plates j either toward or away from each other, and the strips 10 are then adjusted so that the sensitized plate will be held in the same position with respect to the lens as the ground-glass plate occupies. These strips 10 can also be adjusted so as to take up any aberration or defect in the lens.

When it is desired to insert the sensitized,

plate beneath the holder, one edge is placed under the wide strip having the spring m, and said spring is compressed until the opposite edge of the plate will pass under the opposite strip, when it is thrown and held beneath the same. By this construction it Will be observed that the sensitized plate can be readily attached and removed.

I have illustrated another form'of plateholder in which I still retain the essential features-to wit, the longitudinal or lateral movement of the strips 7c, central spring for holding the plate against the strips 70, the Vertical adjustment of said strips, and a spring in the wider strip; but in this modification I secure to the board I grooved pieces 0, within which the ends of the transverse pieces 0 will lie, these transverse pieces having upwardly extended portions, through which bolts pass for securing the strips k thereon. Each of these transverse pieces 0 are provided with rack-bars p, which pass beneath guides formed in the central frame P, which also carries a central pinion which engages with each of the rack-bars, the shaft of the pinion havinga wheel for operatingthe same. One of the rack-bars is provided on its outer edge with notches with which a locking-dog qcan engage. The spring Z for holding the sensitized plate against the flanged strips k overlies the end of the wheel and pinion. By means of this construction the parts can be quickly adjusted bysimply turning the handwheel so as to expand or contact the strips k. The spring Zin this instance is hinged at one end, so that it can be turned to one side when it is desired to operate the hand-wheel. The board I can be turned to locate the plates either vertically or horizontally.

Having thus described my invention, I claim 1. The combination, with a photographic camera having hinges or pintles secured to the rear edge on one side thereof, of a ground glass plate-holder having on each edge sockets which are adapted to engage with the aforesaid pintles, so that the frame holding the ground-glass plate can be reversed, substantially as set forth.

2. The combination, with a photographic camera, the rear end of the box thereof being provided at oneside with proj ectingpintles and at its upper portion with a spring-catch, of a 3. The combination, with a photographic-1 camera box, the rear frame of which is provided with marginal projecting strips and side pintles, of a frame for supporting the ground glass, said frame being adapted to be reversed and maintained in position and having sockets adapted to engage said pintles in either position, the glass in the reversible. frame being located to one side of the center thereof, for the purpose set forth.

, 4. The combination, with the box of a photographic cam era, of the rear frame B, having a rearwardly-projecting ledge at its base and a spring-catch upon its upper edge, together with pintles of a plateholding frame having shutters, said frame being adapted to be reversed and maintained in position, and sockets for engaging said pintles in either position, substantially as shown, and for the purpose set forth.

5. The combination, with a rear frame B of a photographic camera having pintles, as described, of a sensitized-plate-holding frame reversible and formed of two parts hinged to each other, said parts having recesses in which the edges of a sensitized plate will lie, and a shutter hinged to one of said frames, said shutter being adapted to open into the camerabox to expose the plate, devices located at the side for opening and closing said shutter, together with sockets carried by said plateholding frame for engaging said pintles in either of the positions'to which the plate-holding frame may be adjusted, substantially as set forth.

6. The combination, with a photographic camera, aplate-hold er, consistingof two frames hinged to each other, each frame carrying a shutter or shutters, of a partition-board secured between said frames and provided on each side with means for retaining plates, the frameD being reversible, substantially as set forth.

7. The combination of a frame D, made up of two sections, which are hinged to each other, each section being provided with a shutter, a recess for engaging with projecting pins 1) on the ledge B, and also with pins d for engaging with the spring-catch I), substantially as shown, and for the purpose set forth.

8. The combination, with a plate-holder for photographic cameras, a frame provided adjacent to the opening therein with strips secured to the frame and provided on their inner portions with grooves, of a shutter E, havin g inward ly-tu rned edges e, which are adapted to lie within said grooves when the shutters are closed, and an operating-handle forming a means for conncctin g the shutters to the frames, substantiallyas shown, and for the purpose set forth.

9. The combination, with a photographic camera, of a frame provided with a shutter, and operating-handle journaled in said frame and seen red to the shutter, said handle carrying a grooved plate, which engages with the spring g, attached to the outer edge of the frame, so that the shutter will be held either opened or closed,substantially as and for the purpose set forth.

10. In combination with the frames D and D one of said frames having a projecting ledge, while the opposite one is correspondingly recessed to provide overlapping o nts, a central recess within which a sensitized plate will lie, and a hook for securing the sections, substantially as shown, and for the purpose set forth.

11. The combination,with the double frames D and D hinged to each other and provided with shutters, of a deep-seated recess It in one of the frames, corner-blocks 7L2, pro eeting above said recesses, and turn-buttons 71. for retaining the sensitized plate, substantial] y as shown, and for the purpose set forth.

12. The combination,with the frames D and D hinged to each other and provided with shutters, shutter-operating devices located at the side, each of said frames being provided interiorly with recesses h and h, of a nontransparent partition I of greater thickness at its edges than either of said recesses, said partition being provided on opposite sides with means for holding sensitized plates thereon, substantially as set forth.

13. The combination,with the frames D and D hinged to each other and provided with shutters, of a non -transparent partition I, adapted to be held between the same, and provided with adjustable means on each side of said board for securing sensitized plates thereto, substantially as shown, and for the purpose set forth.

14. The combination, with the plate I, having lateral or vertically adjustable slides with upturned edges, of transverse strips 70, bent, as shown, and provided with slots, and means for adjusting the strips upon the slides, substantially as set forth.

15. In combination with the partition I, having the lateral or longitudinal adjustable slides secured thereto, transverse strips 70, secured to said slides, one of said strips carrying a spring against which the edge Of t sensitized plate will abut, substantia as set forth. board 16. In combination with the partition I, having on each side thereof adjustabl slides, flanges adapted to lie over the sensitized plate, a central spring for forcing the sensitized plate against the projecting flanges, and a spring carried by one of the transverse strips having flanges, so as to forceone edge of the sensitized plate against the opposite strip, substantially as shown, and for the purpose set forth.

17. In combination with the partition-board I, slides secured thereto, said slides having strips attached thereto, which project toward each other, said strips being adjustable there on, rack-bars connected to said slides and adapted to engage with a central pinion, means for locking said slides, and a hand Wheel for turning the pinion, so as to operate both slides simultaneously, substantially as shown, and for the purpose set forth. IO

In testimony whereof I aflix my signature in presence of two Witnesses.

JOSEPH M. RHODES. Vitnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6553155 *Apr 15, 1994Apr 22, 2003Rohm Co., Ltd.Image sensor and optical character reader
Cooperative ClassificationG03B17/44