US899792A - Photographic apparatus. - Google Patents

Description

J. B. LOW, F. G. BRADBURN & J. H. TYLER.

PHOTOGRAPHIG APPARATUS.

APPLICATION FILED FEB. 23, 1907.

Patented Sept. 29, 1908.

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J. B. LOW, F. G. BRADBURN & J. H. TYLER.

PHOTOGRAPHIG APPARATUS.

APPLICATION FILED FEB 23, 1907.

899,792. Patented Sept. 29, 1908.

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J. B. LOW, F. C. BRADBURN & J. H. TYLER.

PHOTOGRAPHIG APPARATUS.

APPLICATION FILED FEB. 23, 1907.

899,792. Patented Sept. 29, 1908.

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UNITED STATES PATENT OFFICE.

JESSE T3. LOW, FREDERICK O. BRADBURN, AND JOHN H. TYLER, OF ROCHESTER, NEW YORK.

PHOTOGRAPHIC' APPARATUS.

Specificationof Letters Patent.

Patented Sept. 29, 1908.

Application filed February 23, 1907. Serial No. 358,884.

To all whom it may concern:

Be it known that we, JESSE B. LOW, FRED- ERICK O. BRADBURN, and JOHN H. TYLER, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Photographic Ap aratus; and we do hereby declare the fol owing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to photographic apparatus, and more particularly to an im proved carrier for photographic plates, the object of the invention being to produce a device capable of carrying a number of plates, and so constructed that the plates can be readily placed therein and removed therefrom, one at a time; without danger of becoming light struck.

A further object is to provide a plate car rier with means for causing the plates to drop therefrom, one at a time, to a plate holder or a developer, in the daylight, without necessity of sliding the plate to release it from the carrier.

A further object is to provide a device into which plates can be discharged, in daylight, from a plate holder, and which can also be operated to discharge plates, in daylight, to a developer, or to a plate holder.

A further object is to produce a combined carrier and transfer device which shall be simple in construction; easy to operate, and which shall be eflectual, in all respects, in the performance of its functions.

With these objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings; Figure 1 is a perspective view showing the application of the carrier to a daylight developer for the purpose of transferring an exposed plate to the latter; Fig. 2 is a longitudinal sectional view of the developer shown in Fig. 1 and showing the application of a plate holder thereto; Fig.

3 is a longitudinal sectional view of our improved carrier. Fig. 4 is a longitudinal sec tional view of the carrier mounted on the developer Fig. 5 is a longitudinal sectional view showing a plate holder mounted on the carrier for transferring a plate to the'latter Fig. 6 is a longitudinal sectional view showing the carrier mounted on a plate holder for transferring a plate to the latter; Fig. 7 is a transverse sectional view showing the carrier mounted upon a developer for transferring a plate to the latter; Fig. 8 is a transverse sectional view of the carrier; Fig. 9 is a partial horizontal sectional view of the carrier showing the plate clamp.

vThe body 1 of the carrier is made of sufficient capacity to contain a number of photographic plates 2 which may be placed therein in a dark room, or which may be discharged thereinto from a plate holder as hereinafter described. The sides of the carrier are cut away or reduced, so that it can be fitted between the side walls of a daylight developer 2, as shown in Figs. 1, 4 and 7.

The end wall 3 of the carrier is provided with slots 4-5 one near the top and the other near the bottom of the device, for the reception of slides or shutters, 6, 7 ,the side walls of the carrier being provided with grooves to receive the side edges of said shutters and the end wall 8 being provided with grooves to receive the forward ends of the shutters, so that when said shutters are in place, the light will be effectually excluded from the interior of the device. The wall of each slot 45 is recessed to receive spring pressed light seals 4 5, which normally bear against the shutters 6, 7, and close the slots 4, 5, should the shutters be entirely removed when the device is being operated.

The carrier may not only be charged with fresh dry plates while in a dark room, but it may also be employed to receive exposed plates from a plate holder, and it is adapted to discharge fresh plates to a plate holder in the day-light and also to discharge exposed plates to a daylight developer.

For the purpose of applying a plate holder to the carrier for the purpose of transferring a fresh plate from the latter to such plate holder, as shown in Fig. 6, the carrier is provided along three of its edges with flanges 8 to embrace two sides and one end of a plate holder 9. One of these flanges may be provided on its inner face with a felt strip 10 to receive one end of the plate holder and the latter is provided near its other end with a rib 10 to enter a groove 11 in the carrier and effect a light seal at this point.

At the opposite edges of the sides and one end of the carrier, ribs 12 are provided, to enterifgrooves 13 in the frame of the plate holder, and the latter is provided near one end with the rib 10 to enter a groove 15 in the carrier, when the plate holder is mounted upon the carrier, as shown in Fig. 5 for the urpose of transferring an exposed plate from the late holder to the carrier.

When 518 carrier is mounted upon the developer for the purpose of transferring exposed plates to the latter (as shown in Figs. 1, 4 and 7) the ribs will enter grooves in the transfer frame 16 of the developer, and a rib 17 on said transfer frame will enter the groove 15 of the carrier.

The carrier is provided with a holding and releasing device for the plates and is adapted to permit a single plate to be dropped, either to a plate holder or to a developer. This holding and releasing device comprises .a bowed spring 18 set into a recess 19 in the inner face of the front end wall of the carrier, and provided on its respective edges at points centrally between its ends with forwardly projecting lips 20, 21. The spring and its lips are so disposed that the lips will be spaced from the respective shutters, a distance slightly greater than the thickness of a plate, so that one of said lips will engage one end of the plate next above the bottom plate of a series in the carrier, and press the other end of said second plate against the opposite end wall of the carrier which may be provided with a felt strip 22 to receive it. It will be understood that when the carrier is disposed in the position shown in Fig. 4, the lip 20 will engage the plate next to the bottom of the series of plates, and when the carrier is disposed as shown in Fig. 6, the lip 21 will engage the plate next to the bottom. The reason for the provision of two lips 2021 on the spring is to enable plates to be discharged in either direction from the carrier; fresh plates being released by the lip 21 to permit their discharge into a plate holder as shown in Fig. 6, and exposed plates being released by the lip 20 to permit their discharge into a developer, as shown in Fig. 4.

With the carrier disposed as shown in Fig. 3, the lip 20 will clamp the second plate from the bottom and cause it to sustain the weight of the plates above it, while the bottomplate is resting upon the shutter 7 of the carrier.

For the pur ose of withdrawing the spring to release a p ate, a rod or pin 23 is secured to the spring and passes loosely through the front end wall of the carrier, and through a plate 24 secured to the'outer face of said front end wall. The rod or pin is provided with a long pitch screw thread for the reception of a thumb nut 25.

said plate.

It will be readily seen that by turning the thumb nut and causing it to bear against the plate 24, the spring 18 will be withdrawn, so as to remove the pressure of lip 20 (or 21) against a plate in the carrier, thus releasing The spring 18 will be so constructed that its maximum tension will enable it to properly hold the plates in the carrier in the manner above described. The sole oflice of the thumb nut 25 is to withdraw spring 18 and to permit it to apply the force of its tension to the plates, but the construction will absolutely prevent any manipulation of the thumb nut to apply more pressure to the spring than the inherent tension of said spring is capable of exerting.

The carrier will be supplied with a number of plates (while in a dark room as before explained) and the number of plates inserted may be denoted on an indicator 26 on the carrier.

Assuming now, that it is desired to transfer a sensitized plate from the carrier to a plate holder, the carrier will be placed upon the plate holder in the manner shown in Fig. 6. The shutter 6 of the carrier will now be withdrawn to permit the bottom plate 27 to drop upon the shutter of plate holder, as shown in Fig. 6. The shutter 6 may now be replaced, and the shutter of the plate holder will be withdrawn to drop the plate into the holder as shown in dotted lines in Fig. 6. The shutter of the holder will be replaced, the plate secured in the holder, and the carrier removed from the plate holder. Thespring 18 of the carrier may now be operated by means of the thumb nut 25, to withdraw the lip 21 and permit the plate held thereby to drop upon the shutter 6. The spring will then be released to permit the lip 21 to engage the next plate above, in the same manner as the lip 20 is shown engaging a plate in Fig. 3.

The operator having charged his plate holder with a sensitized plate, and having exposed said plate in his camera in the usual manner, he desires to place the exposed plate in the carrier. To accomplish this, the parts will be disposed as shown in Fig. 5, so that the exposed plate can be placed into that'side of the carrier from which it can afterwards be discharged to a developer. The parts having been arranged as shown in Fig. 5, the operator will release the plate in the plate holder and permit it to drop upon the plate holder shutter. This shutter will now be withdrawn and the plate 27 will be dropped upon the shutter 7 of the carrier. The holding and releasing spring 18 will now be withdrawn by operating the thumb nut 25, until said spring and its lips '20 and 21 assume the positions shown in Fig. 5. The shutter 7 of the carrier may now be withdrawn and the plate permitted to drop into the carrier.

Assuming that several plates have been exposed, stored in the carrier for subsequent development, and that the operator wishes now to develop these plates. He will place the carrier upon the developer, in

the manner shown in Figs. 1, 4 and 7. He will then proceed to withdraw the shutter 6 to drop the plate 27 thereon, to the transfer slide of the developer as shown in Fig. 4. He will then replace the shutter 6 and may at once operate the spring holding and releasing device 18, to drop the next plate upon the shutter 6 and then clamp the next higher plate in position. The transfer slide of the developer will be withdrawn by the operator and the plate dropped into the developer, as shown by dotted lines in Fig. 4 and in full lines in Fig. 7. The transfer slide will be replaced, the carrier removed apd the operator will proceed to develop the p ate.

Having fully described our invention what we claim as new and desire to secure by Letters-Patent, is

1. In a device of the character described, the combination with a carrier or container adapted for the reception of a series of plates and open at its top and bottom, and movable shutters for closing the top and bottom of the container, of a clamping device operating to clamp a plate above the bottom shutter, and sustain all the plates above the clamped plate and means for operating said clamping device to drop the bottom plate upon the shutter, clamp the plate above it and sustain the remaining plates.

2. In a device of the character described, the combination with a carrier or container, adapted to contain a number of plates and having an open bottom, and a movable shutter for closing said bottom, of a clamping device within the container and above the shutter, to engage one edge of a plate and press the other edge against the opposite wall of the container and clamp said plate within the container, and means for operating said clamping device to drop one plate upon the shutter, and then clamp the next plate to sustain the same and the remaining plates above the shutter.

3. In a device of the character described, the combination with a carrier or container having open top and bottom, shutters normally closing the top and bottom of the device, and a plate clamping device within the carrier, said clamping device operative to clamp a plate next to the plate which may rest on either shutter, and drop the plates one at a time upon a shutter either for exit through the top or bottom of the carrier, said clamping device operating to sustain all the plates except the one which may rest upon one shutter or the other.

4. In a device of the character described, the combination with a carrier having 0 en top and bottom and shutters normally 0 osing the top and bottom of the carrier, of a spring in the carrier, havin a lip at each edge, said lips being disposed a s iort distance from the respective shutters, and means for operating said spring to release the plates one at a time.

5. In a device of the character described,

the combination with a carrier or container adapted to contain a number of plates and having an open bottom, and a movable shutter to close said open bottom, of a spring actuated lip located within the container above the shutter to engage one edge of a plate and press the other edge against the opposite wall of the container, said li being disposed a short distance from the s iutter, whereby said lip will engage a plate immediately above a plate resting on the shutter.

6. In a device of the character described, the combination with a container for a number of plates, said container having an open bottom, and a shutter for closing said bottom and sustaining the bottom plate, of a clamping device arranged to clamp a plate, and means for operating said clamp to drop a plate onto the shutter and engage the next plate and sustain the remaining plates.

7. In a device of the character described, the combination with a container having an open bottom, and a shutter for closing said bottom, of a spring within the container, a lip on said spring disposed to engage one edge of a plate and press the other edge against the opposite side of the container, a rod attached to said spring and passing through a side of the container, and means for moving said rod longitudinally.

In testimony whereof, we have signed this specification in the presence of two subscribing witnesses.

JESSE 13. LOW. FREDERICK O. BRADBURN. JOHN H. TYLER.

lVitnesses:

FRANK M. GoFF, MATILDA R. GURLIOH.

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