US899235A - Automatic fluid-controlled variable-time-exposure valve mechanism for photoprinting-machines. - Google Patents

Description

J. P. WARE da T. W. BUNDLE.

M S I N A H m M E v L A v E R U S 0 P X E E M I T E L B .A I R .A V D. E L L 0 R T N o C D I U L r C T.. Ml. A M o T U A S..7. E0 Nm 1. H2 C1 AR. MA Gl mD E T. Nu m... N Wo TI wn m MP P FA Papented sepnzz, 1908.

' 3 SHEETS-852131.

i wfg V7// f J. P. WARE z-T. W.. RUNDLE. AUTOMATIC FLUID CONTRQLLBD VARIABLE TIME EXPOSURE VALVE MECHANISM POR PHOTOPRINTING MACHINES.

APPLICATION IILED KAR. 12, 1907.-

Patented Sept. 22, 1908'.

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J. F. WARE & '1'. W. BUNDLE. AUTOMATIC FLUID .coNTIIoEILEn VARIABLE 'IIME ExPosnEE VALVE MEGEANISII ron PIIo'roPEIN'IING MACHINES. APPLICATION TILED HAREN, 1D0-1.

Patented .septh 22.1908.

.S SHEETS-SHEET 3.

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.minas .nw/mami) 'riioiiiiis w. iiUsDL. or DENVER, concierne, .i'ssiciroiis'ro Tini: .uiroiii'ric riiorocaiirn raiNriNc ii/iciiisa commi', A coiiroiwriozv or ARIZONA 'raiuii'romt l 'f AUTOMATIC rxLUm-coN'iaoLmm vanxmamrnpifnxrosonn vaLvE imcua'msar Fon rno'rornm'rme-Macms. 1

spannenden meteen Patente Patented sept. 2 2,'19oe., Appiimion' nim auch ni, i901. 4serai No'. sei-,970. i

No. comas.

To all whom it may concern.

Bo it known that we, JAMES F. Waar. and 'liioisias W. RUNDLE, citizens of the United States of America, residing in the city andchines, of which the following is a specifica tion.

l. Oui invention relates to-a new automatic fluid controlled variable time exposure valve mechanism for photoprinting machines; and

. the objects of our invention are: First, to

provide a variable'time operating valve for automatically regulatingand governing he intermittent operatin movement o the printing meclianism'o photographing ina chilies, that require a regular intermittent period of time in which 'to make an' exposure and to performan operative printing move-` .Second, to providev a :valve that moves automatically through its operative movement with a steady, even movemcn-td that canbe varied to any predeterinizze quick-or slow movementdesired. Third, to provide a'uid controlled variable time oper ating valve that isadaptedto control the operativeaction of doors, shutters, backs of printing machines, and other reciprocatingdevices.l We attainthese .objects by, the

`iriecliaiiisiii illustrated in the accompanying drawings, in' which:

'Figure 1, is a perspective vicyvl of a valve,

embodying our invention. ig. 2, is a sec- 4tional. elevation throughthc' 4 center of't-he valve. Fin-3; is asectionalelevation of a photograpiiic-printing cabinet, showin v the application of our improved variable timetime control and the .'ipclriiting valve to the automatic release ol" its printing pad holdin back or door, theisaid door being closed, an( the valve lunger rod releasedand ,in t-lic "act of deseen Fi f. 4, is van eiid view of the cabinet, showing t ie valveland o erating iiiechamsin.connected therewithg'tie door of the cabinet being removed. 5, is a perspective view of the upper portion. of the valve and mechanism connected therewith; fhg. 6,". is a front view of a fragment of f the mechanism open' And. the cabinet, showin ated 'by theltehl.) the pad-lioldingdor,

`designates the cylinder of'our valve.

The valve is preferably `nterior of with `tho latching of the door.

Similar letters of reference refer to similar parts throughout the' several views.

Referring 4to tlicdrawings, the numeral 1, This portingx base 2,: to .whichit 'niay'bethreai ed 'or ot erwise secured, r .\vitli.\vhicli it1niaybe integrally .castf- .We preferably. liowevcr, cut a thread on the lowercnd of tliejcylinder and screwit'into a threaded-recess 3, formed in the base plate. -Tliis c linder'is l rovidcd witlia pistonbore 4, whic i extends rom one end tp tlie.othcr end. l At the lower end of the cylinder andat diametrically o posite oiiits', inlet and'outletports --an' 7 are cylinderis mounted' on any suitable su ornied atthebott'om of thecylinder, and y outlet andinlct ports'8aiid9'are also formed at thetopof the cylinder.- 1 yThe orttp isan inlet port into the cylinder, and t e portf.- is an outlet portent-,ofthe cylinder ontheopposite side of rectly above the'inlet.- port 6,and.th' e portQ is an inletport intel-lie,cvlinder'directly. abOve'the outlet sitclyfarranged'setsofports 6 and 8, a un i sides of thecylinder by tu esfor pipes and 11 :which are preferab yeast integral with the A port-6 is controlled by an suitable' automatically. operating' inlet va ve, Ilap valve1 2,-'whicli:is secured at one side to t-lie'port'in a' osition Vto' siving open under the pressure; the.inflowing'fluid, andY to close 'thesportI .wheii .,th`e-luidf rassure is forced .d'ownin the cylinder. inlet port il, is also provided v'with a' v'alve -1.3, and vitlvc sea'il l', .which are located in the top of the vertical portioii'of the tube j11. of -tlie plug type and fits against a taperscat formed around the the tulic. A viilve'iitcni lextends frdni'the valve vup through thetulic yand throuvh a plug i6, which. is sci'cwcdiiito a threadci apeiturol, ,foriiied'iiitlie to inf the pdrt, while the port Slis an outlet port from tlie.cy1inde1' at itsitop'di- 'l ie cylinder.

for releasing the plunger rod, simultaneously,l

are connected .togther on opposite but Awe preferably "employ la. common' the tubo. 11"., This plug.;y is '-pr ovided',\vit i ii threaded n. erturc in' the lug. .This'plu is also irovi( ed .with a stuii'ing box 20 and a glam .nut 2l is screwed on top of the plug over the stulling' box, an aperture bein'r formed through the stelling box, and through 4the land nut in line 'with the apcrture'in the stu ing box, throuvh wliichthe'valve stein projects, and suitarble packing 4isi placed in the stuflingbox and gland around the valve stein. and the gland is adjusted to pack the stern 'against leakage. At the t'op ofthe valve'stcni a pointer 24 is se'cured, and an index dial 25 is secured beneath the pointer, which is provided with a number of index lines arranged ra'dially around it, and -which indicate e( ual intervals of the circiiliir movement of die pointer in moving the valve stem and valve from a closed to a fully opened position.

A piston 22 of suitable weight, is recipro-v call mounted in the cylinder and is provided wit suitable packing rings 23, and a'piston rod 2Gs secured at one end to the piston, and extends up through a cylinder head 28 which' is threaded to the upper end of the cylinder. A pin 27 extends upward from the base plate, to limit the downward movement of the piston, and a pin 27^ extending upward from the top of the piston, contacts with the head 2S, to'liinit the upward movement of the piston. The cylinder head28 is )rovided with an axial aperture through which the is-v ton rod passes, and also wit-lli a packing ox 29, a packing gland 30, and a packin" material. On the piston rod above'the'gliind we mount' slidablyl a crosshead 3l, the opposite ends of which are slidably mounted on two vertical rods which are secured at their its downwar lower ends to the top'of the cylinder headi On these i'odsexpansive coiled sprin gs 32 are placed, the lower ends of which rest on top of the cylinder head, and their opposite ends bear against the under s ide of the ends of the erossliead. These s rings are of `suflicient .length t-o peri'nit o a 'resilient movement equal to the stroke of the istonin its cylinder. Upon the piston rodpa collar 33', .is ad- 'ustably securedby a. set screw 34. This col'- ar is positionedon the pisto'n rod tobe engaged by the .crosshad when the crsshead and also the iston is attlie lowest point of d3 stroke, and .when-the' crosshead is released the piston is raised to the lop of its upper stroke by the engagement of' the crossliead with. this collar through the medium of tliecrossliead springs. 4This crossliead is moved down to tlie'liniit of its mechanism connected to the door or shatter or pad holding back or other thing oit inaehincor devicetliat is to be operated by the valve.

We have preferably illustraicd'our inven lion applied lo our new pliito;,' iaphic rintin; machine, for which we have especia ly in- 'sheets of photorintin vented it;'and`in which we have adapted it to automatically control the -variable time exposures required to print y difl'e'rent pictures rom difl'erent negatives, and for vignetting printing work;and we preferably carry out this feature of our invention in the following nianiicr: This printing machine consists of a cabinet 35, referably mounted on legs, and preferably o a height to bc o erated by an opcrater standing besideI it.' hiscabinet preferably consists of a-square box-sha ed frame i 4inclosing a large chamber in w hic i an electric or siiitab e light is placed. I'Hinged doors 36 and 37 are placed in the opposite vsides of the cabinet to allow easy entrance to tlie cabinet from its opposite sides, and in the central portion of the top of the cabinet a glass door 38 is hinged to lift and swing u ward, and to the under side of the'top of t ie cabinet at the` sides of this glass door several slide-ways 39, are laced, in which the vignetting sheets are -p aced. The negatives and paper are laid on top of the glass oor. t the rear or hinged end of the glass door, a pad pressure shutter or door 40 is'hinged, which .is adapted to press a suitable cushioning pad against the print paperand smoothly ,pressjit against the glass door. Tli is padv ressure shuttei` is preferably niadein two ialves 'which are iingcd together, a s A extend fromone' hal door to the other.

ring being arranged to A pneumatic cylinder and piston 4l, are- 'connected to the shutter-.and top of the cabi; ,netto' cushion the opening movement of the shutter'. This divided shutter and the neumatic cushioning cylinder and piston r o not.

however, form an essential partof my present invention, and a-fuller description of their exact construction and arrangement is unnecessary, as any suitable single piece pad pressure hinged shutter c'an be used instead.

of the divided shutter illustrated, itonly bein necessary to 'operatively connect it t'o the oi valve in sii'cli'a manner that the shutter is released and is arranged to open automatically and to be arranged to be instrumental in 'mov-iigthe piston of the oil valve down to theA limitiof itsdownward strokewlien it stands fully open; and in crariyinr out this feature of our invention we pre erably secure "a segment of. a sheave 43 to the center of the width of the back of .the shutter adjacent to its hinged end, to which one end of a cord or chain 44 isattached, the o posite end of which is extended over a smalil'slieave pulley 45, jom'naled in a lug 46, which is secured to the top of the cabinet. From this pulley' the cordextends down through an aperture in the top of the cabinet into its light chamber, and to a slieave pulley 47,journaled inla lug 48, secured to the floor of the cabinet under which it passes and then extends iipw'ard and is connected to a lever 48^, which isthe crossliead actuating lever of the oil valve, one end ros -\ eoneaved recesses lll lingeis of the forked end of the lever are' of which is pivotally sedured lo a lui,r 115i, which is secured to one ol the inside walls of lhe cabinet.

'l`lic oil valve is preferably set on thelloor ol the cabinet close to the op iosite side ol the chamber of the cabinet, from tho side the pivot-ed end of the lever is secured to, and the opposite end of thc lever 48'* extends to the valve and its end is bifurcated to forni a fork 50, which straddles the piston rod and ifs collar 33, and these ends rest on a couple of blocks .31, which are secured to the top of the erosshead. The top surfaces of these blocks irrepreferably provided with 512, and the lower side of rounded to tit into,these recesses, which'arrangement holds the end of the lever 48* in constant bearing engagement with the crosshead, as its springs hold it under constantA upward pressure, and the closing weight of 'the shutter through the inediuin of the cord is pulling'tlie lever down against the block with a lconstant downward pressure, the

.weight ofthe shutter being directly on the lever, and the erossliead springs are strong enough to raise the lever, and through the medium of the cord to raise the door and normally hold it in an opened position, as shown in Figs. 3 and 4.

When 'print-in f photos, the-shutter is shut, that is ressed own against tl" glass door b the and of the operator, and is locked tg'ere by an automaticall f operatinglock, which we will presently describe; and this downward closing niovemen't'o'fA the shutter sulla on` the.cord'and Apulls the lever 4S^ own and. it presses thecro'sshead down en -.its springs, and when the shutter is locked down against-the glass door the lever holds the crossl'icad-down' to the li'niit of its operative downward movement under the expansive tension of-its-springs, until the shut? tei'4 is unlocked by the piston at the end of its downward moveni'ent. lThis downward travcling movement 'of' the pistonbei'ins the instant the shutter is closed and-rocked in a closedposition, as 'the piston is`nornially at'. the u per end of its vertical stroke, as'it is.

raisei andheld thereby the erossli'eads en-- gagement with thc` collar-33 h v tht` expansion tension of its sprin fs.

While any suitable 'e iaracter of a `locking mechanism that the downward inoveiiient-of the oil valves piston can release at the end of its downwardstrokeh' can be ein iloyed to lock or latch tlie'shutter-in a closed position, we' preferably car out' this feature of our invention in the f ol owing manner: The front end of'the shutter-is provided with a hand knob 53, which is secured to the u i )erelid of a stein 54, whichfextends vertealllly ambi-ef; ciproeally through and beyond a hub 55, formed on theto i o e' shutter; This hub contains a'ehani er 56,`in`whieh an expansive spriiw is placed, which is iirranf'cd to l normally iold the stein and knob at tlic top of its vertical movement. A plate 56^ is secured to the top of the cabinet and this stein extends down through an aperture 57 in the to of the )late and cabinet, into a lock 58. A iook 59 is secured to the under side of the shutter in front of the hub, and depends therefrom and extends throufrh an aperture 60 formed in the. late 56 andathe topfof the cabinet. The loc 58 comprises a supportin plate 61, which is. secured to the under si'e of the top of the cabinet. A yokeshaped clip 62 is secured to-the plate, t o wliieharight-angled latch hook 63 is pivotally attached intcrmediateof its ends; one end of this latch stands vertically and is provided with a'liook arranged to hook ov nr the hooked end of the dependinfiP latchvef the shutter. The opposite end of-J this latch 'extends to and is pivotally connected t'o a 'verticaliy-reciprocating toothed ,rack bar '64,. `whieh is :eciprocall mounted in a' slidewa 65, secured 'ui the piate, the top end of which lies in the peti: of and is enviigejd by the decabinet.

the teet of a segment of a pinion 66, :which is pivotally seeured to the plate. An 'arm' 66 is securedto this pinion, thelifiuterend a lever 67, t ie opposite end of which is'pivotally connected to one end of a crankl'ever'S. the o positeend'ofwhieh is -secuifedto one end o a), shaft 69, which is rotatabl fournaled in lde e'ndinfr brncketsf70,'whiciiare secured to t ie under side 4of the :topofi'the cabinet. Theuoppositeend of this shaft .is

positionedl to'lnstand' fvertici'tllyf' fdownward whenthe shutter is open, being held in that around the shaftand fastened 'at one end to it, 1its 'oppositeendbeiig' secured to the ad-` jacentraclet. .The lower 'end of the varm 66'* is-ada 'ted to beeoi'inccted -to a mechanism -i.f1s`ed) iii, priiit.in;:,4 that does. 'not formany part of niy invention, 'Fliese'tivn spring catches '-land V75, which fare made of s iect spring metal. These spring catchesai'e secured at one end to the under 4side of the 4to of the-cabinet, and in a position to depeni on vopposite sides of the piston rod 'of .the oil valve, and opposite to -the shaft 69 and in the oscillating path of the pins 7l and 72,-whieha're engared bvtheni the in v71v being adapted -to eek the knob ani stein lock meel anisni to the spi-ing catch 74 when thesliutter 'is shut, and the pin 72 being arranged tiyi'elease the piston the .instant the Ashutter is'loeked, allowinpr itI to descend in its cylinder, and theynre arranged to perposition by asspring 473, which is coiled scending knob stem-'f the shutter, whenit isclosed against the top of the glass'door ofthe The ear teethbf the-rack bar :irne'sh'u-ivith of which-,is ivotally connected to' one' end lof l provided with two pins 7.1 'and72, which are pins ilA and-7'.' a-re'adapted to 'engage two Y and piston'rod forni these functions in the followimr manner: The spi-in(y c atch 74 is provided wilt-li a rightangled of -sct that is positioned adjacent to its lower end to catch the pin T-t at the upper end of its upvraritoscillating movement. A curved terminal cnd 7 8 is formed on the end of the spring, which is arranged to be engaged by the pin and moved back enough to allow the step to spring back under the pin when it is moved upward by the movement of the'lock andthe oscillating movement of the shaft and pins, due to the closing of the shutt-er, which will be more'fully described hereafter; thus locking the pin and shaft and the right-angled latch of the lock to the latch of the shutter and holding it locked until re'- leased by the iston at the end of its downward stroke, w iich act on the part of the piston will be presently explained. The lower end .of tlie spring catch 75, is also provided with a right-angled ste and also with a terminal curved end portion adapted to be engaged and pushed back by the pin 72, as it is moved upward by the oscillating movement of the gshaft. The stop however, is adapted to ac; as a saddle for a pinor arm 79, that projects rom a hub 80, which is adjustably secured to the piston rod of .the oil valve.4 This .hub is also provided with iisecond arm 81, which we terni a guide arm,

which projects towardsthe adjacent side of the cabinet where it ent'ers a cuide-way slet 82, formed in a bracket S3, which is secured" to the side of the cabinet. This cuide-way slot and the guide arm hold .he iston against turning; consequently 4the hu 79` will move vertically and reciprocallyl in the same pla'nc and will always be seated'inI the offsetste of the'spring lever 75,- when it` is raised to t io top of its upward stroke. A hub 84 is also'adjustably secured tothe piston rod above the hub 80, whichis provided with a projectingr arm 85, that is positioned to engage theend of a' projecting pin.86, 4which is secured to the spring catch 74, in th'e downward path of the arm 85. vThe arm 85 strikes the pin 86, at the end ofthe piston s downwardstroke, and moves thespring so`that its lstep'isfjorced'from nder the pin 7 1, which is under a constant downward pressure,`due to the spring 73 o n the shaft 69, and the minute the pin 71 is released the 'coiled spring and this niovement'trf the shaft partiallyrotates the gear segment through the medium of which instantly springs up open throu h ther medium of the crosshead springs, the orked lever, and oord, and as thecrosshead rings upwardft strikes the collar 33 and li is the piston rod upward with it to the top of its 4th'o .length ofl time exposure necessary make'thc'm print satisfactorily ie afm ent invention.

' on, and it is vfilled throu on its'shaft forces. the shaft to oscillate ,and turn th'e pin down strasse upward stroke. The loil valves valve'stein 15 extends up throu yh the top of the cabinet finger may be turned to any desired point the graduated index disk.

T ie operation of our luid controlled variable time exposure valve for photographie printing mac iines, is as follows: The [lirint-i ing machine is adapted to print in dup icate copies of photographs; consequently t ferent 'negatives of different pictures from' -which co ies are to beprinted would require different cngtlis of time exposures, and when from a negative, the index finger is setat apoint of the'index corresponding to the numer of seconds or a minute and seconds or two or more minutes that the operator and the leii fth of time f or Vtheexposure can be accurate y adjusted by making a few tests and moving the index finger to either init is desired to print alarge number of copies thinks wiii im aie-, iengthpf time required for the exposure required to print the 'picture;

crease or' diminish the time of theexposure .l

until the'printed copies are found to have t0 W'hen printin photographic pictures, t inside of-the ca iinct isprovidec with a suit-able light, and is otherwise arranged to print'pictures.. We do not however, Aillustrate or describe this" feature, as'it does not forin'a art of our pres- The oil vva ve cylinder fis made of a length and capacity suitable f or the size of printing machine it'is to be used removing a plug-88, with any suitable oil or vh an aperture 87- by A other fluid,l which when the piston descends flows through the tube -11 and valve 13', and port 9, into the' top of the cylinder, and onto the top of the iiston; when however the piston israisedt e oil flows through the inlet port 6 into the cylinder and under the piston and'iiito thetube 11. The cylinder should be A -made long enough'to permit the piston to be .three or fourr more minut-es in making its full downward latch releasing stroke with a valve A opening suiicient to insure an even steady movement of the'piston. The turning of the index finger turns the valve stem 15, which being threaded to the nut 16, lowers or raises the valve 13 either ltowards or from its seat in the compartment 11 of the cylinder, and thus allows more or less oil to llow through the.valveportthus il the index is svt at leii thc shutter is locked to it.

Ill

l of the oth'erpovrt into the top of said eylin 'printinrv exposure, and the valve automa-tie- 'and piston red'to .make "their downward' photo-printing nutehines, the eotubiuation semen seconds, the valve )ort is opened toallow just. enough oil to low through the port. to allow the piston rod to be ten seconds in traveling its downward stroke from the time it is released by the closing of the shutter until it releases the shutter at'the end of its downward stroke. 1l' the exposure. required is one minute, the index lingeris moved to the one minute point, which opens the valve far enough to allow the oil to llow fastenough to allow the piston rod to move slowly enough to he one minute in releasing the shutteral'ter it is closed and locked to the valve. Consequently, lafter the op'erator has adjusted the time index te secure the dea sired time exposure, he sim )ly closes'and locks the shutter to the vavo alter each ally hods the shutter closed and exposes each picture exactly the same length of time until as manyr pictures are printcdus desired. Aud'when achange is made to-a negative-requiring a longertime olexposurc, the index' must lie-readji'isted to open or close the port of the o il valvc"tt iall o\\ the piston operative movement in' the time required, when the valve will automatically hold the shutter closed and release it at'thc end of the time required for the exposure, as often-as Our invention is-simple,1reliable, and enables.photographieL ric'tures to`be quickly and accurately 'dupliated- Vto -any number required i and our l-invention contemplates the usef'of the oilvalfe and an operative locking 'and releasing.mechanism for use for other eharacters'ol machinery andj'to per- Having described ourinvention, whatwe claim as new and dcsirctosecu're byLetters Patent', is: L1. i r I '1. 'In lanfjautomatic fluid controlled variabletime-exposure' valve mechanisnnior photzprintinv machines, the combination with a-.suitalpilc'eabinety-providedv with a swinging shutter,- anda spring-controlled latch mechanism, et af. valve comprisinvva vertieilly 'disposedfcylinder provided wit a port on caer side,l a' piston reciprocally mounted .in saidcylinderafvalved inlet from oneport into ,the-bottom ofsaid'cyh inder, .and out-let valve Aleading-from the top der, an index controlled valve stem attachedl to said outlet valv'e., means including a spring'. controlled latch l'for lookin r'said shutter 'ina elosed'position 'oh said'ca iinet, and means' including n:projectin r 'arm -on said lpiston arI ranged-to releasesaill shutters latch' at the end ot the piston rmls'downward stroke, as speeilied.- i t 2. In 'an automat-ielluidcontrolled variable time exposure valve mechanism for of an oil valve, comprising u. cylinder and its 'shutter against said cabinet, means c0nnested witC-h said oil valve for engaging said latch and releasing said shutter, resilient means on said valve for holding said shutter under a constant openinfr movement tension.

3. In an automatiellilidcontrolled variable time exposure valve mechanism for photo-printing machines, thecombination with the cabinet, thcswinging shutter hinged thereto, and means for latelnm1r said shutter closed against said cabinet, oi a fluid controlled valve connected to said cabinet and comprising the cylinder (provided with a body of oil, the piston an 'piston rod', and

the manually'operated valve, said piston be-` `piston ,rod in said.

ing arranger to move in said 'body of oil on itsr downward'stroke bv its' weight, resilient means connected to said cylinder for raising and holding said piston'at the to of its upward stroke, means including a ever and a cord connected with said shutter, and said cabinet, for holding said shut-ter under a constant'opening tension, and means connected with said piston rod for releasing Vsaid shutter's latch, and shutter, at the end of its downward stroke. f-

4. In-an autoniatic'iluid controlled 'variable time exposure valveV mechanism for pl1oto-printin r machines, 'the combination of ya.-'-vertically disposed cylinder having l"nivo-controlled ports and provided i'with a supplyof liquid, a reciprocating piston and ciproeate in'saidtfluiI ,and 'a manuall con'- trolled valve arranged to control the ow of fluid. in said cylinder to ermit -ditlerent speed movements of'said piston and iston lrod on their vdown stroke in said 'c inder,

with a -cabinet provided -withl a'gass ex-4 l posre plate, a shutter hinged-to said cabinet and adapted to'beelosed against-said exposure plate. 'means including a--la'tching mechanism for locking saidsliutt-er close-d to said exposure late," ir reci )rocating lever s'ecured atone'cnt 'in said 'ca iinct,y a cord connected Vat' 'on'e. end ladjacent to the hinged cnil of saidhinged shutter'and secured at its 'opposite'end adjacent tothe opposite end'of'saldlcver, a.l -ierosshead reciprocally' mounted onV said cylinder'fandpiston 'roth-"springs arranged to move'said 'crossheadin 'one' dirc'ctian'of its reciprocal lmovem ent, the closing weight of said shutter bein" arranged througlrthe me'- dum 'of said con tohold 'the free end of said Plover-against said crossliead, and the' said i free end of sald'leverbcmg moved tra.:

l closing movi-.nient of 'said shut-tei' toll'oree c'lmder adapted to-relbe raised tothe top of itsupward stroke by the upward springing vmovement of said crosshead when said 4shutter'is .unlatched from ilsclosed position over said exposure plate, means connected with said piston for engaging said ylatch meclianism-and releasing said shutter, and an index late arranged on said'cabinet 'and arrange todctermine the manbual o ening movement of said valve to permit sai piston rod to fall on its downward strokein said .fluid and release saidl shutter latching mechanism.

5. In'ifanl'automatic fluid ,controlled variable time exposure valve 'mechanism for photo-printing machines, the combination of a'cabinet provided with a glasaexposureA pl ate, a shutter hinged to said cabinet to swing down and'be closed over said glass'exposure plate,. a hook de ending from the freeend of said shutter, a s idiiig knob springco'ntrolled in one direction of its movement extending th'rou li said shutter, a latch' mechanism attache .to said cabinet comprisi 1.a hook, a toothed rack bar attached to sai hook'and arranged in thep'ath of said sliding knob, and adapted to' move said l'iook to engage and .lock to the hook of said shutter, a gear Asegment in'engagenient with -sa'id rack bar provided with a rejecting arm, a shaft 'our-f naled tosaid ca inet solas to be oscil ated and presided with a projecting pin, a crank arm' on one end of saidshaft,a' lever .con-- nected'at one end to said gear se'I ments arm and at its opposite end to said s iafts crank arm, and a lever' connected to said cabinet atone end and to .said shutter Vadjacent" to its opposite end,with a fluid valve comprising a cylinder having independent port'sconn'ect- 'ing its opposite ends Van automatically oper` ati valve controlling theentranceoi` one of said portsinto the bottoni of' said cylindeg-.g'

a manually operated valve arrangedto'con t'rol the'outlet of the other port into the top of said cylinder, a reciprocating i iston' and piston rodfin said cylinder-,a col ar on said piston rod, guides' on said cvlinder, acrossiead slidably inountedon said guides and on said' piston rod'bet'ween said collar arid said cylinder, expansivesprings on said "uides between said cmsshead and said cylinder, said ciossliead being arranged in enga-vement with and ada )ted to liolil'said shutter s o ening lever an said shutter under' a resi icnt opening pressure when said shut-ter is locked to said latch, a spring blade arranged to receive and hold the projecting pin of said latchs oscillating shaft when said shutter its upward stroke is closed, a'projecting pin on s'aid pistonjod arrangedl to en age saidspn'ng and releasesaid latclis osci lat-ing shafts pin, a projecting pin on said piston rod, a spring b ade ar'.

ranged toen age said piston rods projecting pin, and hol said piston rod at tlieitop of itslipward stroke, a pin 'projcctingifronilthe oscillating shaft of said latch and arran'ged to eng' e said 'spring and release said piston rod, an( -a valve opening movement .index arranged adjacent to said manually operated; valve stern, substantiall asspecihed.

o. Iii-fan automatic f uid'controllcd variable"'tiine exposure valve: mechanisml for photo-printing machines, the? combination with the cabinet., the ex' osure plate, andthe hinged shutter arrangeciJto'sving down over sai down a ainst' said exposure platetlie lever4 and cord attached to said shutterfor'opening said shutter, and an oil valve in said cabinet having -a vertical piston adapted to move on y an expansive spring arlranged on said valve and iston, and adapted to operatesaidlever an l. cord to normally hold said 'shutter open," said piston being adapted to move on its downward stroke by its weight,means connected to said piston rod for-.releasing saidshutters lo'ckingim'e'chanism at the end-'ofits downward stro a manuallvoperated valve provided with'v a variable movement index attached to 'said oil valve and arranged and adapted 4to control said oilvalve to cause said piston rod to" move on its downward strokes at difer'ent rates o f l speed whereby said shutter may be locked'to said cabinet and valve for different predet-erl- 'mined, eriods of' time and be automatically release l at the' end 'of a' set time by the down:

"ward strokeof said piston rod.

r 7*.' Ingan automatic fluid controlled variex osure plate, a latchmeclianism o`nsaid ca inet arranged' to latchsaid shutter.

e, and

'les

able time .exposure 'valve mechanism.-- for,

photo printing machines, the icombination of theA oil valve, the cabi'net,'the shutter,'means for connecting said shutter to'saidqil-valve v, 1^

to normallyhold said shutter open,'means including 4a latch mechanism connected to said "cabinatf'-yfor`iocking said shutter closed, and

means co eetedvvith said valve-.for engagg 'midi' whingemehanis'm and for oper- Wely ll'sng said shutter at different pre-ll de'terminedperi'ods ofA time after said shutter is latched-to said cabinet.'

8. In an automatic fluid controlled vari-J' abletime exposure valve mechanism foi photo-printing machines the combination.

with the cabinet provided with. a glass expos sure plate and shutter Y at one end, and adapted to'swmg dovvn over said exposure plate, said shutter being divided into'two halves hinged together, resilicnt means for holding said halves in opere tive! relation to each other, a latch mechanism arf rangedgpartially in said cabinet and partially.

hinged to said cabinet speed and time of the weighted stroke olrsaidpiston in said Hind-controlled valve, iiicans including springs connectedto sind piston and valve for rinsing and rcleasinpr said shut-- ters and cahinet's latching,r nieclninisiii, at the end of its weight actuated stroke, and means connected with said shutter and with the spring actuated lmeans for moving said' piston and its piston rod to the end of one of its reciprocal inoveinentslfor normally hohling -said 'shutter under constant openinbY movement tension, and .means inchidingla cylindecand a piston for cushioning the openingnioveinent'ofsaidshutter.

9.-,Iii anautoniatic fluid controlled variable'tinie exposure valve mechanisml for .A photoiriiiting machines, the-combination of the ca iinet,l the oil valve, and th'e shutter' divided in'two halves hinged together, one part of said shutter' being hinged to said cahinet, a' resilient cushioning device on said cahi- -'net connected 'to said shutter and arranged to cushioirthc openiinr movement of said shut-l ter, the cord andlevcr for connecting said shutter to said oil valve, the latch mechanism arranged to lock said shutter to said cahinet in a closedpositi'on, and means connected to said oil valve for releasing said latch'niechanisin nndor permitting the operation of said cord an lever of said shutter to open the sinne after predetermined periods of tiinc.

` 10. Iiil an -alitoina'tic fluid controlled variahle' time .exposure valve mechanism for photo-printing,iiiac-liiiies, 'the combination of the iluid controlled'oil valve comprising the cylinderand iorts, vthe -pistonQand piston rods rcciprocally mounted in said cylinder, the inlet-valve, the'outlet valve and valve stein provided with an opening mdvenicnt index, with the cabinet-the glasaexposuie plate. and the shutter hinged to said cabinet and adapted to swing tocover said glass exposure plate, a latch mechanism connected t-o` said shutter and said cabinet 'and 'arranged to lock said shutter closed to s'aid cabinet., a spring controlled mechanism arranved to move said piston to the end of one oisits reciprocal movements and operativel neeted lto said shutter to normally le, d said shutter under a constant opening movement pressure and inea-.ns connected to the pieton' rod of said oil valve for releasing the latching mechanism of said shutter.'

ll. Inan automatic fluid-controlled varitable time .exi'osure valve mechanism for lphoto-printing machines, the combination .with a photo-printing,r cabinet of a vertically positioned cylinder mount-cdtherein, having ports connecting its opposite' ends, a weighted piston and piston rod in said cylinder, a swinging inlet valve from one of the lsaid 'cylinder ports into thc bottoni of said cylinder, a )lug valve arranged t-o control the `cvviindcr, a valve stein connected to said outinder and arranged to he turned in its threaded seat to move said plug valve to open or der, a body of oil in said cylinder and. ports, a collar on said piston rod, guide rodi` secured to said cylinder, expansive coiled' springs mounted on said guide rods, a cross head slidrods, and resting on said guide rods springs,- and adapted to iiornialllv force said piston rod to thc top of its vertical stroke and to be moved down on its` guide rod springs far to travel down in said cyiinderto the end of its downward stroke and when released to ward stroke, a projection on said piston rod,

arranged to enga fe the projection of said piston rod ,end hol said pistonaiid rod at the top of its upward stroke when raised there by the spring movement of said crossheacl; a

cluding a. lever connected to said cabinet and shutter andvarranged in .engagcnient with said piston rod's crosshead, and adapted to 'is 'cioccd down and latched 'tosaid ,cabinet and to compress its spring far enough .to allow said pist-on rmlto-inm-eto theend of its f downward stroke, a spring lever connected to locky said shuttcrs latcilinieehanisni, and means connected to said piston rod for engag- .ing saidcaliinct's sprinvlever at the` lower 'end of its dmvnward stro e, and releasing-(iw terandca iinet and therebv allowing said shutter. tobe forced open b v the upward spriiwinginovcment of said spring actuated cross iead and said shuttcrs connecting lever and thereby .throwing said piston rod again to 'the top ofits upward stroke, and means inlet valve and threaded to the top of said c vlforce said piston rod up to the top of its upi cluding an index for deterniiniiw the opening outlet of t ie other port into the top of said :f

close th(` port leading to the top of --aid cylin- 80 'ably mouinedon said piston rod and guide 85V enough to permit. said.piston rod and piston 9o a springlcvcr connected to said cabinet and cmperatiinq4 latching mechanism4 connected 100 to sind shutter and said cabinet, means 1nmove said crosshead down when said shutter said cabinet and arrancd `to engage and copcratin late-hingnicchanisni of said shut- 1 154 l2. In an automatic fluid controlled variable time exposure shutter releasing valvo. mechanism for'photo-priiitiiig machines, the combination of thc'cabinct provided with the glass exposure late and the swinging sluitter, the cord an lever connected to said slintter 'and cabinet, the reciprocating hand operated knob and latch hook at 'the free e'nd of said shu ttor, thel hitch mechanism attached to said cabinet and arranged to engage the hook of said shutter, with the hiid controlled valve comprising the cylinder, the piston and piston rod, thc outlet valve and valve stein operativelj arranged to' engage said latch mechclcfsed an to release it at different predeteranisni and open said s hntter, and means for' controllin said valve to hold said shutter mined eriods o'ftinie.,

3.. n an'antomatic iinid controlled vari-. able time exposure shutter releasing valve4 "mechanism for hote-printing machines, thel combination -o .the cabinet,' the shutter ing latc to enga-Ue s aid slintters hook and simultaneously tiil; said r'ock shaft and cause its lprojecting pins to cngagcsaid cabinets spring lever, and lock said shutter to said cabinet, and the fluid controlled valve p rovided with a variable time movement piston and an adjustable operating valve.

14. In a fluid valve controlled mechanismV for photo-printing machines, the combina.

tion with a cabinet of a` pad holding shutter hinged thereto, comprising two members united by a hinge connection ya catch on said shutter; a hook pivoted. to' the'cabinct, for engaging the catch a s ring controlled rod connected at one end t rough a system of levers and a rack andpinion with said hook and havinvr a finger at the 'other end;..a

.spring catch adapted to hold said finger when said rod is turned, a li uid operated valve for releasin said finger aving a pist0nrod which'is ield normally, in a raised position; and an arm on said piston rod for engaging said spring catch as the pistoniod descends; a knob on said shutter for o perating. the rod and pinion to simultaneously lock thc shutter, turn the rod th cause its finger to engage the spring catch, and release the-piston 'ro" and springs for raisiiigsaid shutter when the latch is released.l

l5. In a fluid valve controlledlmechanism for photop'rinting machines, thefc'ombination with a Vabinet of a pad-holding shutter hinged thereto comprising two [members unitedby u. hinge, a latch for lockin said shutter against the topl of said ca inet, springs for .normally holding said slintter one cnd with said latch and havingl a finger'l at its other end which is engaged by and held by a spring catch when the rod is turned; a

.o cn' a s rinir controlled rod connected atp 1 p n fluid operated valve having a weighted pist-on provided with a rod having a projecting arm for engaging said spring' catch on the descent of t ie iston; and. means for simultanconsly-latching thc shutter and releasing the istbnand means foi cnsliioning the up# ward) movement of the shutter.

16. In a'device as's ecified, the combina-"- tion with a 'cabinet iaving a hinge/,d ad holding shuttercomprisin hinged 'mgether of means orlatching-and for' autonilatical releasing 'saidffsshutten comprising jan oi -valvehaving an oil `"c linder, a weighted piston in said cylinder av-4 ing an extended rod; a s ring catch,'afinger on said piston rod whic nrmallyengages said catch andholds said piston elevated; A

an a'rm on said iston rod; a spring catch having a pin whic is adapted to be engaged by said arm, a spring controlled rod, having y fingers, one of which is engaged by said last` mentioned catch when the rod is turned,

while the -other movesI the first mentioned latch to release the pistonr'od, a hook on said" hinged shutter, a latch-.on the cabinet, and means connecting said latch and spring controlled rod-consisting 'of 'a rack and Vpinion andl arm, means for. tiirning. said pinion to operate the 'armand rod and 'ag spring controlled le'vei. connected 'withthe ad holding door, and with the piston rod oft-:the air valve, which is fide closed, andw ic'h raisesl shntterisl released. ,-L

'In testimony, whereof"ive affix our signa tures in presence ,of two witnesses.

' 'l JAMES F. VARE. A -THOMAS W. RUNDLE. Witiiesses'z- G. San'G'aN'r ELLIOTT, ADEL'LA M..Fowi.a.

the piston when the ressed, when.` th shutter 4is

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