US909090A - Photographic developing apparatus. - Google Patents

Description

D. JAMES.

PHOTOGRAPHIG DEVELOPING APPARATUS.

APPLICATION FILED NOV. 4, 1907.

Patented Jan. 5, 1909.

in the art to which it wash plates,

,and consists in the features of construction and combinations 'ofdparts hereinafter fully J tters STATE PATENT oFFro-E.

' DAVID JAMES, OF CHICAGO, ILLINOIS.

rzroroeaazemc DEVELOPING APPARATUS.

Specification of Letters Patent.

Application filed November 4, 1907. Serial No. 400,664;

To all whom it may concern: I

Be it known that 1, DAVID JAMES, citizen of the United States, residing'at Chicago, in

the county of Cook and State of Illinois, have invented certain new and useful Improvements in Photographic Developin Apparatus; and i do hereby declare'the following to be a hill, clear, and exact descri tion of the invention. such as will enable ot tors skilled appertains to make and see the same. I

This invention relates to a novel device for use by photo raphers todevelop, fix' and, the object being to provide a'= simple, very compact, li ht proof and easilymani ulable device of t'llS charapter which ma, 1e reed for developing plates in daylight reveloping tank capable of rse in daylight withorit danger of the penetration of light to the contained plates and he means of which the greatest possible number of' lates may be developed with the rss of the l cast quantity of solution, and which generally ermits of easy handling of the plates from the time they leave the camera until they are washed ready to dry after development To the above and other ends my said device comprises a rectangular receptacle A made of a material which is proof against-the action of all chemicals rscd in develo ing and fixing'photographic plates, the sai receptacle being open. at one end and adapted to be sealed by means of a cover-B receiving the open end thereof. The bottom C .of the receptacle and the upper wall-B of the cover .are provided at one end with openings Eand F respectively through which liqiiid and air pass into the tank, the latter being deflected and forcedto take a zig-zag course by means otthe staggered plates orgfalsebottoms and G and H disposed inwardly of and par- .ahei with the bottom (1 and top D, said stagsent importance only tained therein.

in preventing the penetration of light to the contained plates andare therefore capable of for accomplishing the same object.

- Patented Jan. 5, 1909. 1

being replaced by any other suitable means The cover is secured in place by means of snitable latches such as the trunk latches I shown and both the cover and bottom eqnipped'with a ring J bymeans of which the receptacle malybe carried.

Fitting witiin the rece tacle A 18 a rack K adapted to receive the p ates to he treated said rack comprising two inverted U-shape "wires L disposed parallel with each other and to the free ends of which the rectangular s relet'on base M is secured. Secured at their side edges to said wires L are two opposed parallelracli-plates N each provided with.

parallel vertical recesses O of a width sufficient to receive two plates, said recessesbeing separated b -pro ections P of less width so that when t e rack is filled the vacant spaces between the ,plates will be of less width than the occ'u ied s. ace, thrs enabling the maximum n'um er o platesto be conthe recesses O in The plates are disposed in airs back to back, thesensitized surfaces sing this fully exposed to theaction of the sohitions in which they are immersed. The said rack K fitssnugly within the receptacle A and the latter in turn is adapted tobe received in a sli htlylargcr rectangular receptacle Q, ada ted to contain developer and sub sequently t e fixing bath, the said receptacle A fitting the last named sufiiciently snugly to car so a relatigely small quantity of contained liquid to be so far displaced thereby asto rise above the upper ends of the plates to be developed. The receptacle A may then be removed and dipped repeatedly in water if desired to partially wash out the developer preparatory to fixing,

the fixing sohltion being new 'sul stitiitcd in the receptaclelQ for the dc'velo er and the 'receptac remain until the plates are fixed, being then .again removed and the rack removed there- .t'rorn.- The latter may then, after removal 0 A then reinserted an allowed to of the fixing bath, be'returned into the receptacle Q and the latter placed under a hydrant to finally wash the plates, or the rack maybe dipped repeatedly into any other retacle conta ning-water .(changedat 1nterce vas to iIISTII'B complete'washing out of all 'hypo or'other fixer) this affording a very convenient means for handling'the plates throughout the process without necessitat 45 tives ere permitted only. limited longitudinal I mg contact of the hands therewith frcm ghe time of insertion ,until after Washing when they are removed and set out be dry.

l'desire also to direct attention to the feet that the plates after beinginserterl in the receptacle A may be kept indefinitely so that a photographer taxing pictures at cli'lierent 'polnis on the road, or on successive days may transfer the exposed )letes to the re ceptecle until the letter is led to its cspee 'ity and then develog all of Same, the i711 fer being made inav vlight proof beg designed for the purpose and constituting portable dark room. The reversibility. of the receptacle A com .stitu tes an essential feature of'the invention for the reason that it enables the photogre pher to easily maintain the developer in motion relatively to the'plete's which s well known, is very desirehle cc secure is of pete formity of action on eil per The arrangement shown end. (l

also permits the developer to be easily mein taineol very cold or cooi by immersion ef eib'i tank Q in a hee -e2 of crashed ice or cold Water this retarding the action ei' the sir-3 veloper which is also freqiiently veiy desir able to the-eiteimneni of best I claim as my invention:

1. A pl'iotographers (ieveieping comprising in comltineiio. ten to contain the developing agent, 5;

fnr negatives ada ted t0 enfiei' said "re-21h,

removable rack isposed in recepoml receiving and maintaining ne aeives erly spaced, said rack being eqi ipped handle projecting above the t mer ends contained negatives 0 permit remov said rack WiilllOLt contact of f iends 1- the negatives, the net depah of said L iacle being onlyslightly then ill 16 length of the lergestnegetive ezinpeed he contained whereby when said recencecle is inverted at intervelsgseid cenleinecl l ege i Lill ea. tor r or .liqiicl, cover 2 1,.

recep e, there being hoe" him and ,cov teele seine fillCl thrcu places? air ereci into said mule 2. A nhotogr phersde A 111 egent, three pei'zzllel bet-130m. nleies a one et'respectn 3: i i

.195 end mtervein? said letes forming e 1 i properiy ready remove;

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