US1274651A - Device for developing photographic films and the like. - Google Patents

Description

V VINDRIM & D. D. YOUNG.

G PHOTOGRAPHIC FILMS AND THE LIKE. APPLICATION FILED MAR.29. 1915.

DEVICE FOR DEVELOPIN Patented Aug. 6, 1918. I

2 SHEETS-SHEET I.

S. WINDRIM & DiD. YOUNG. DEVICE FOR DEVELOPING PHOTOGRAPHIC FILMS AND THE LIKE.

APPLICATiON FILED MAR. 29. 1915.

[I a Z 55 d 72 z Patented A11 6, 1918.

UNITED STATES PATENT orrion SAMUEL WINDRIM AND DAVID DONADDSON YOUNG, OF BELFAST, IRELAND.

DEVICE FOR DEVELOPING PHOTOGRAPHIC FICIlMS AND THE LIKE.

"Specification of Letters Intent.

Patented Aug. 6, 1918.

Application filed latch 29, 1915. Serial No. 17,661.

To all whom it may concern: I

Be it known that we, SAMUEL WINDRIM and DAVID DONALDSON YOUNG, both' subjects of the King of Great Britain and Ireland, both residing at Belfast, Ireland, have invented certain new and useful Improvements in and Relating to Devices for Developing Photographic Films and the like,

of which the following is a specification.

This invention relates to apparatus for the developing of photographic films and the like without the use of a dark room and it has for its object to provide improved 'and simplified apparatus for this purpose we provide another and somewhat smaller tank, shaped to fit into the tank above de scribed, vso that there is an annular space between the inner wall of the outer tank and the outer wall of the inner tank, the two tanks being so constructed at. their tops that, when the inner tank is in position a light tight joint is formed between the two tank tops, means being provided for retaining this light .tight joint, while allowing the inner tank to turn relatively to the outer tank, so that a vertical projecting member or pin which is. provided at theyoutside/ and parallel with the outer wall of the inner tank, and which may be secured to the top of the inner tank or elsewhere, may be caused to engage the end of'the film carrying strip, so that by turning the inner tank through one complete circle, the pin would be caused to draw the film into the annular space between the walls of the tanks, so that the developing solution previously poured into the outer tank and forced into the annular space by the insertion of the inner tank will act on the film drawn into said annular space.

With the apparatus above described it.

will be understood that the film strip only extends once around the annular space between the tanks, and in order to provide a more compact apparatus, or an apparatuscapable oftaking a longer length of film we may provide means whereby the film may be caused to extend more than once around the annular space between the tanks as hereinafter described. V I If desired, means may be provided to effectively stop the turning of the inner tank when the film is completely unwound into the ann lar space between the tanks.

In or er that our invention may be clearly understood we have hereunto appended explanatory sheets of drawings whereon our -1I1V8I1t101'1 is shown by way of. illustration or example. A

Figure 1 is a cross sectional elevation of'one form of apparatus in accordance with our invention (on line so a: Fig. 2).

2 a plan view (partly in section).

Flg. 3 1s a cross sectional elevation on the line :1 y, Fig. 4 of another form of the apparatus in accordance 'with our invention (part of the inner tank is cut away).

Fig. 4 1s a plan view of Fig. 3 (partly in sectlon).

Under our invention as shown in Figs. 1 and 2 the developing apparatus or device comprises a circular open topped tank a w1th one or more recesses or equivalent a? in the side wall of the tank, said recess a being open to the interior of the tank and adaptedv to receive the usual film spool 12. A flat spring 0 (see Figs. 3 and l or equivalent means are provided to hold the spool 79 in the recess a while allowing it to freely turn therein, and we provide another and somewhat smaller tank 03, shaped to fit into the tank a above described so .that there is an annular space 0 between the inner wall of the outer tank a and the outer wall of the inner tank cl. The two tanks are constructed top of the inner tank to retain the two tanks 1n posltion w1th a light tight oint while allowing the inner tank d to turn'relatively to the outer tank so that a vertical proecting member or pin d which is provided at the outside of, and parallel with the outer outer tank and the projecting part at the v wall of the inner tank d, and which is, in the example shown, secured to the top of the inner tank and may be caused to engage the end 6 of the film carrying strip 5 on the spool b. By turning the inner tank 03 through one complete circle, the pin 01 would be caused to draw the film strip 5 into the annular space 6 between the walls of the tanks a and 03, sothat the developing solution previously poured into, the outer tank, through a hole a (now suitably plugged and light tight) and forced into the annu tank 03 will act on the film strip 6 drawn into said annular space e. If desired, the developing fluid may be added after the film is in the annular space by providing an opening in the Wall of one or. both of the tanks. If desired, we may provide on the bottom of the outer tank a small button or disk such as g or equivalent, so' that the whole apparatus may be readily turned or rotated thereon for the purpose of efiectively circulating the developing fiuid in the annular space 6, between the tanks. Forthis purpose the apparatus may also, if desired, be adapted to turn upside down and remain water-tight.

For the purpose of discharging the fluid in the annular space we provide an opening a in the wall of the outer tank, and an opening a in the inner tank Wall said opening being suitably corked or provided with other suitable closure means, and said opening or openings may also be used to wash out the annular space and to wash out the developing fluid from the film when development has'been completed.

WVith the apparatus above described it will be understood that the film strip 6 only extends once around the annular space 6 between the tanks at and d and in order to provide a more compact apparatus or an apparatus capable of taking a longer length of film We may provide means whereby the film may be caused to extend more than once around the annular space between the tanks.

Such an apparatus is shown at Figs. 3 and 4 of the drawings.

The inner turnable tank d or equivalent and the outer tank a of the apparatus are made generally as described with reference to Figs. 1 and 2, but in this case the film strip 6 is first wound on to the outer surface of the inner tank (1, and then passes therefrom on to the outer surface of a ring or partial ring h or equivalent which is turnably arranged, for instance, on the central projecting boss (1 shown .in Figs. 3 and 4 and positioned between the outer surface of the inner tank d or equivalent, and the inner surface of the outer tank a. The turning of the ring his positively stopped at a predetermined place, for example when the ar space 6 by the insertion of the inner required length of film is unwound, by suitable means, such as a projection k on the ring it and stopper a on the tank a. The ring it does not turn While the film strip 6 is being unwound on to the outer surface of the inner tank 03, which slides over the top .of the ring it until the projection d meets projection k and then ring it will be carried around along with the tank d and the film strip 6 will engage and bethereby wound on to the outer surface of the ring it. The turning of the ring it is effected by the projection 03 on the tank d engaging the projection if on the ring it. The turnable ring may be so made and arranged that while it is slidable circumferentially it cannot move otherwise between the inner sur face of the outer tank and the outer surface of the inner tank. In the example shown this is effected by the bosses a and it the boss 7& being turnably arranged on the boss a which is situated at the center of the bottom of the outer tank a.

The modified apparatus above described with reference to Figs. 3 and 4 is operated generally in the same manner as the forms of the apparatus described with reference to Figs. 1 and 2, with this difference, that the film strip 6 is firstwound on to the inner tank 03 or equivalent and then on to the turnable partial ring it, and of course, the apparatus is as described withreference to Figs. 1 and 2 provided on the inner tankd or equivalent with a projecting member 03 or equivalent adapted to engage the end 6 of the film strip 6 whereby the film strip 6 is unwound from its recess a as the inner tank d is turned and also as the inner tank d and the partial ring h are turned as above described. It will be understood that by lengthening the tanks and the spool recess or recesses, more than one spool of film .could be dealt with at one time by arranging the spools one on top of the other and unwinding them as hereinbefore described.

Having now fully described our invention what we claim and desire to secure by relatively to each other, and means connected'with the inner tank whereby a film strip can be unwound from a spool and drawn into the space between the tanks.

2. Apparatus for d e ve l o p in g photographic film spools comprisinga vertically disposed cylindrical tank having spool accommodating means in its, wall, a second cylindrical tank of smaller, diameter turncylindrical ably supported within the outer tank, means effecting a light tight joint between the can be unwound from its spool into the space between the tanks and on to the outer surface of the inner tank. 7

3. Apparatus for developing photographic film spools comprising a vertically disposed cylindrical tank having spool accommodat-ing means in its wall, a second tank of smaller diameter turnably supported within the outer tank, means eileoting a light tight joint between the tanks while leaving them free to be turned relatively to each other, a turnable partial ring'positioned between the outer andinner tanks and means connected with the inner tank whereby a film strip can be unwound from its spool into the space between the tanks on to the turnable partial ring:

4. Apparatus for d e v e lo p in g photographic film spools eomprislng a vertically disposed cylindrical tank having spool accommodating means in its wall, a second cylindrical tank of smaller diameter turnably supported within the outer tank, means effecting a light tight joint between the tanks while leaving them free to be turned rality of turnable partial rings.

relatively to each other, a plurality of turnable partial rings positioned between the outer and inner tank and means connected with the inner tank whereby a film strip' can be unwound from its spool into the space between the tanks and on to the plu- 5. Apparatus for developlng photographic film spools comprising avertically disposed cylindrical tank having spool accommodating means in its wall, asecond cylindrical tank of smaller diameter tumably supported within the outer tank, means efiecting a light tight joint between the tanks while leaving them free to be turned relatively to each other, a turnable partial ring positioned connected with the inner tank whereby a spool can be unwound and drawn into the space between the tanks and on to the turnable partial ring velop on to or into which the film strip can be drawn.

In testimony whereof we afiix our signar tures in presence of two witnesses.

' SAMUEL WINDRIM.

DAVID DONALDSON YOUNG. Witnesses:

ANDREW HAMILTON,

JOHN KNox.

and a flexible band or en-

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