US446373A

US446373A - Supply-case for roll-holders in photographic cameras

Info

Publication number: US446373A
Authority: US
Publication date: 1891-02-10
Anticipated expiration: 1908-02-10

Description

(No Model.)

, O. WHITNEY. SUPPLY CASE FOR ROLL HOLDERS IN PHOTOGRAPHIG OAMERAS. N0.-446,373. Patented Feb. 10,1891.

UNITED STATES PATENT OEEIcE.

CHARLES WVHITNEY, OF CHICAGO, ILLINOIS.

SUPPLY-CASE FO R ROLL-HOLDERS IN PH OTOG RAPHIC CAM ERAS SPECIFICATION forming part of Letters Patent No. 446,373, dated February 10, 1891.

Application filed May 17, 1890. SerialNo. 352,230. (No model.)

To all whom, it may concern:

Be it known that 1, CHARLES WHITNEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Supply- Case for Roll-Holders in Photographic Cameras, of which the following is a specification.

My invention relates to a supply-case for the use of flexible negative films when used in ribbon form, and is made to operatein conjunction with a winding-post or a friction feed-roller, and also provides a light-tight case for the protection of the sensitized plates and a tension for holding the negative-ribbon straight when it is being drawn out for use. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 represents the supply-case closed ready for use. Fig. 2 represents the supplycase partially closed; Fig. 3, cross-section of Fig. 1; Fig. I, cross-section of Fig. 1, showing slots overlapping to exclude light and to produce tension. Fig. 5 is a modification.

Similarlettersrefer to similar parts throughout the several "iews.

A is the outside case and B is the inside case, both of which are capped at one end and slotted, as represented at A and B. The cap on the case B projects sufficiently to form groove E, into which the end of case A enters. Groove E at one pointhas a slight ridge B projecting inwardly, and case A has slight corrugations A with which ridge 13 engages for the purpose of preventing any sliding or slipping when the case A and B are closed for use.

Fig. 5 shows a modification of case A. A strip or section of tube A is therein shown, the remainder being dispensed with. This is to show that anal-row, section will answerthe purposes of the complete slotted tube for covering slot B and for producing tension, or a sliding cover for a slot in a square case would answer a similar purpose. However, I use and prefer the two slotted cylinders A and B.

C is the negative-ribbon and is spaced into equal distances and perforated and consecutively numbered for each plate.

In a previous application I have shown th perforated and numbered negative ribbon, and I havealso shown in previous applications a winding-post and a friction feed-roller.

The advantages or improvements gained by my improved supply-case over the usual supply spools or cases previously used are, when filled with a roll or coil of sensitized negativeribbon and closed and the outer case turned so that the slots have passed each other, I have a light-tight case, and the whole may be wrapped with any suitable paper to prevent moisture. Thus I have a complete supplycase, which may be filled with any of the wellknown negative films in ribbon form ready for transportation or handling in any of the markets where similar goods are kept for sale or use.

My supply-case may be attached to the frame of a camera or roll-holder by any Well-known mechanism. I show a cross-bar D, which I insert in a slot provided in the camera-case for that purpose.

The tension for holding the negative-ribbon straight when being drawn out for exposure is made by turning until the relative positions of the slots are as shown in Fig. 4, or as much of an overlap of the slots as may be required, the same being regulated in accordance with the thickness of the negative-ribbon which is being used.

In operation the case B is filled with a roll or coil of properly-sensitized negative-ribbon by rolling the negative-ribbon of sufficient amount for the purposes required and insert in the case, allowing the outer end of the ribbon to project through the slot. Then slide case A onto case B, with the slot in case A astride the projecting end of the negativeribbon when the two cases are forced together. Then turn until the slots have passed each other sufficiently for the amount of tension required. Then place the supply-caseinto any camera or roll-holder that may have been previously adapted to receive it and connect the outer end of the negative-ribbon to the winding-post or the friction feedroller, proceeding the same as with other supply cases or spools.

For transportation or shipping, after the cases are forced together and turned until the slots are well past each other then wrap with ters Patent 1. A supply-case for roll-holder cameras, comprising, in combination, two telescoping tubes A B, provided with longitudinally-extending slots and adapted to rotate one within the other, substantially as described.

2. A supply-case for roll-holder cameras, comprising, in combination, two telescopingtubes A B, provided with longitudinally-extending slots and adapted to rotate one within the other, and caps upon the outercnds of the tubes, substantially as described.

3. A supply-case adapted for attaching and detaching in a roll-holder camera, composed of case A and case B, with their slots adapted to produce a friction-tension onthenegativeribbon, substantially as described.

4. A supply-case for roll-holder cameras, composed of two slotted tubes, each capped at oneend, one adapted to slide inside the other, the cap on the inside tube provided with a groove to receive the open end of the outside tube, substantially as described.

5. A supply-case for roll-holder cameras, provided with means for making it attachable and detachable to the same, composed of two hollow slotted tubes, one adapted to revolve within the other, for producing a friction-tension and a light-tight case, substantially as described.

6. As a new article of manufacture, the within-described supply-case for roll-holder cameras, consisting of case A and case B, adapted to contain a coil of sensitized negative-ribbon, substantially as described.

7. As a new article ofm an ufacture, a cylindrical light-tightsupply-case for sensitized negativeribbon, com prising, in. combination, a longitudinally-slotted tube adapted to contain a coil of sensitized negative-ribbon, and also adapted to rotate inside of a longitudinally-slotted tuzge, said slots adapted to pass each other for producing a light-tight case and a friction-tension, substantially as de- J W. DYRENFORTH, M. J. FROST.