US2719473A

US2719473A - Roll film daylight developing outfit

Info

Publication number: US2719473A
Application number: US272802A
Authority: US
Inventors: Buttigieg John
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-02-21
Filing date: 1952-02-21
Publication date: 1955-10-04
Anticipated expiration: 1972-10-04

Description

Oct. 4, 1955 J. BUTTlGlEG 2,719,473

ROLL FILM DAYLIGHT DEVELOPING OUTFIT Filed Feb. 21, 1952 2 Sheets-Sheet 1 I N VEN TOR.

John fi'uii i/gp eg ATTD RN EYS Oct. 4, 1955 J. BUTTIGIEG 2,719,473

ROLL FILM DAYLIGHT DEVELOPING OUTFIT Filed Feb. 21, 1952 2 Sheets-Sheet 2 3 3 7 I JNYENTOR.

39 (707171 fiuttygpay ATTORNEYS United States Patent ROLL FILM DAYLIGHT DEVELOPING OUTFIT John Buttigieg, Elgin, Ill.

Application February 21, 1952, Serial No. 272,802

1 Claim. (Cl. 9590.5)

This invention relates to devices for developing roll film in the field or in the home, and in particular a cylindrical casing having a head with tubes having longitudinally disposed film receiving slots therein journaled in the head and extended into the cylinder and wherein the tubes are rotated by cranks extended from the end of the cylinder and geared to the tubes.

The purpose of this invention is to facilitate developing roll films whereby a roll of film may be placed in a small container in the field or in a dark room and the container may be positioned in another container in which a developer is provided whereby the developer passes through an opening in the casing to contact the film and wherein the tubes upon which the film is carried are rotated to wind and unwind film with a crank extended from the casing and geared to the tubes.

Various types of individual developers have been provided for developing small rolls of film, however, it is dimcult for an amateur to operate devices of this type in a dark room and attempts to develop film in the presence of light have not been successful. With this thought in mind this invention contemplates a film holder having a light-proof enclosure with means for holding a developer around the film and also with means for rolling film from one spool to another.

The object of this invention is, therefore, to provide an individual film developing unit wherein films are inserted in cartridges after exposure and the cartridges are inserted in tanks in which developing fluids are positioned and in which the film is rolled from one spool to another to insure contact thereof with the developing liquid.

Another object of the invention is to provide an individual roll of film developer in which the device may be used repeatedly.

A further object of the invention is to provide an improved roll film developing outfit which is of a simple and economical construction.

With these and other objects and advantages in view the invention embodies a pair of slotted film holding tubes extended from a head with a cylindrical casing extended from the head and surrounding the tubes and with the tubes rotated by gears on the ends thereof which mesh with a pinion on a shaft extended through the head and having a hand crank on the outer end.

Other features and advantages of the invention will appear from the following description taken in connection with the drawings wherein:

Figure 1 is a vertical section through the roll film developing outfit when the device is supported from the edge of a table or the like with a bracket showing the film carrying tubes in horizontally disposed positions.

Figure 2 is a cross section through the device taken on line 22 of Fig. 1.

Figure 3 is a sectional plan taken on line 33 of Fig. 2 illustrating the relative positions of the parts and with parts broken away.

Figure 4 is a cross section through the device with the cylindrical casing omitted and illustrating the position of a film on the film winding tubes, the tubes and mounting elements thereof being shown in elevation.

Figure 5 is an end elevational view of one of the film holding cylinders showing the pin extended from the peripheral flange of a developing cylinder, thereby providing a bayonet joint.

Figure 6 is a plan view of the developing unit showing a mounting bracket extended therefrom.

Figure 7 is a vertical section through the developing outfit showing a cylinder in which the film holding tubes are positioned in an outer developing tank.

Figure 8 is a detail illustrating a plurality of developer tanks positioned to receive the cylindrical portion of the developing outfit of this invention and wherein different developing agents are provided in the different tanks.

Referring now to the drawings wherein like reference characters denote corresponding parts the improved roll film developer of this invention includes a head having a plastic cap 10 mounted on a base plate 11 with an annular flange 12 having bayonet slots 13 therein and the flange 12 is positioned to receive the open end of a cylindrical casing 14 that is adapted to extend into an outer container 15 and into which

film holding tubes

16 and 17 which are journaled in the head, extend, and these tubes are adapted to be rotated by a hand crank 18 on the outer end of a shaft 19, through a pinion 20 respectfully, and a thick gear 21 and a thin gear 22 positioned on the

inner tubes

16 and 17.

The cylindrical flange 12 is provided with an extension 23 by which it is secured to the cap 10 with rivets 24 and the

tubes

16 and 17 are journaled in the cap with pins 25 and a bracket 27 through which the shaft 19 also extends. Aspring 28, positioned around the shaft 19 engages

washers

29 and 30 on the shaft and resiliently holds the shaft outwardly. Pressure on the end of the shaft by the crank 18 urges the shaft 19 inwardly whereby the pinion 20 moves to the position indicated by dotted lines in Fig. l, meshing only with the gear 21 so that the tube 17 may be rotated by the crank to position a film, which is indicated by the numeral 31, and the gear of the tube close to the operator will not rotate.

The extended ends of the

tubes

16 and 17 are provided with

slotted rings

32 and 33, respectively and the rings are provided with

slots

34 and 35 that may be positioned to register with

elongated slots

36 and 37, respectively in the

tubes

16 and 17.

With the parts arranged in this manner and with the casing 14 removed one end of a roll of film, upon which a paper clip or the like may be positioned may be inserted through the slot 36 whereby the film is adapted to be rolled on the tube 16 and with the film rolled on the tube 16 the opposite end may be inserted in the slot 37 of the tube 17. Paper clips may be placed on the ends of the film or on the tubes to prevent the film slipping through the slots and after the ends of the film are in position in the slots the

rings

32 and 33 are rotated to the positions illustrated in Fig. 3 whereby the film does not slip from the ends of the slots. Although conventional paper clips are suggested as means for holding the ends of the film in the slots, it will be understood that the film may be held in the slots by split rings positioned on the tubes, or by other suitable means.

The end 38 of the cylindrical casing 14 is provided with an opening 39 and radially disposed openings 40 are provided in the edge of a false bottom 41 positioned in the cylindrical casing 14. With the slots 40 ofiset in relation to the openings 39 it is difiicult for light passing through the opening 39 to pass through the slots 40 to contact film on the

tubes

16 and 17.

The outer surface of the cylindrical casing 14 is provided with pins 42 that are positioned to coact With the bayonet slots 13 for securing the casing 14 in the flange 12 on the head of the developer.

The flange of the cap is positioned to slide over the upper ends of one of the containers 15 whereby an annular rim 43 on the edge of the flange of the cap retains a packing. washer 44 against a flange 45 on the peripheral surface of the container 15. By this means a developing fluid in the container 15 is substantially sealed with the head upon which the

film holding tubes

16 and 17 are mounted.

The outfit is provided with an L-shapedsupport 46 the upper end of which extends through the bracket 27 and is secured by rivets 48 to the plate 11. A flange 49 on the lower end of the support is positioned to be secured with a C-clamp 50 to an edge of a table or the like as indicated by the numeral 51.

By this means the device is mounted in ahorizontal position to facilitate threading the ends of a film in the slots of the

tubes

16 and 17 and after the ends of the film are secured in the slots the cylindrical casing 14 is placed over the film and tubes are secured by the pins 42 in the bayonet slot 13. The film is thereby secured in a lightproof casing and with the film therein the casing is placed into the container or developing tank which is indicated by the numeral 15 whereby the entire film may be brought into contact with the developing fluid by turning the crank 18.

With the parts mounted in this manner the film may be inserted in a plurality of developing fluids with a different fluid in a different container as illustrated in Fig. 8.

The film may also be placed in a fixing bath and after being washed it may be removed from the developing outfit.

It will be understood that modifications may be made in the design and arrangement of the parts Without departing from the spirit of the invention.

What is claimed is:

In a roll film developing tank, the combination which comprises a cap having an annular peripheral flange with a similar flange concentric with the peripheral flange and spaced inwardly therefrom, a mounting plate positioned on the outer surface of said cap, a bracket secured to said mounting plate, a shaft having a crank on the extended end rotatably mounted in said cap, mounting plate and bracket, a spring positioned around said shaft and adapted to urge the shaft outwardly of the cap, a gear carried by the end of the shaft extended into the cap, film-holding tubes with elongated slots therein rotatably mounted in said cap and extended from the inner surface thereof, gears on said film-holding tubes also mounted in the cap and positioned to mesh with the gear on the inner end of the shaft, a cylinder having an open end and a closed end and having a partition spaced inwardly from the closed end positioned with the open end nested in the inner flange of the cap, an outer container positioned over said cylinder and having a flange spaced from the end adapted to be nested in said peripheral flange of the cap with the flange spaced from the end thereof positioned against the edge of the peripheral flange of the cap providing a sealed joint, said cylinder positioned in the outer container having a centrally disposed opening in the closed end thereof and said partition having openings positioned at the. peripheral edge and offset in relation to the opening in the end of the cylinder, and an L-shaped support secured to the cap and adapted to be clamped to an edge of a table or the like for supporting the developing. tank.

References Cited in the file of this patent UNITED STATES PATENTS 810,234 Towers et a1. Jan. 16, 1906 1,197,734 Grabert et a1. Sept. 12, 1916 2,212,357 Vanderwalker Aug. 20, 1940 2,405,160 Morse Aug. 6, 1946 FOREIGN PATENTS 417,043 Germany Aug. 4, 1925 275,349 Great Britain Aug. 11, 1927