US970742A

US970742A - Photographic-printing machine.

Info

Publication number: US970742A
Application number: US47650909A
Authority: US
Inventors: Gustave R Olson; Demmie Hiatt
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-02-06
Filing date: 1909-02-06
Publication date: 1910-09-20
Anticipated expiration: 1927-09-20

Description

G. R. oLoN & D. HIATT. PHOTOGRAPHIG PRINTING MACHINE.

I APPLICATION FILED THE. 6, 1909. 970;742. Patented Sept.20,1910.

7 BHEETBSHEET 1 T111 TIE. l5-

G. R. OLSON & D. HIATT. PHOTOGRAPHIG PRINTING MACHINE.

APPLICATION FILED FEB. 6, 1909.

Patented Sept. 20, 1910.

7 BHEETSSHEET 2.

QQU GOGQOOQH q Vihwooeo I G. R. OLSON & D. HIATT. PHOTOGBAPHIG PRINTING MACHINE. APPLICATION FILED FEB. e, 1909.

7 SHEETS-SHEET 3.

flflvanfozs Patented Sept. 20, 1910.

Q vitmmuo G. R. OLSON & D; HIATT. PHOTOGRAPHIG PRINTING MACHINE.

- APPLICATION FILED FEB. 6, 1909. 4970 74 2 Patented Sept. 20, 1910.

7 SHEETS-SHEET 4.

26 /2 15.11]. 57 I 54 28 o 2%, 56 I G. R. OLSON & n. HIATT.

PHOTOGBAPHIO PRINTING MACHINE.

APPL IOATIOI FILED NIB. 6, 1909.

Patented Sept 20, 1910.

7 snnms-annm a.

a. R. 0LsoN & 1). HIATT. PHOTOGBAPHIG PRINTING MACHINE.

APPLIOAIIOI FILED FEB. 6, 1909. 970,742.. Patented Sept. 20, 1910.

7 BEEEETB-BKBIZT 6.

sat

GUSTAVE R. OLSON AND DEMMIE HIATT, 0F PLATTSMOUTH, NEBRASKA.

PHOTOGRAPHIC-PRINTING MACHINE.

Specification of Letters Patent.

Application filed February 6, 1909. Serial No. 476,509.

To all whom it may concern:

Be it known that I, GUSTAVE R. OLSON and DEMMIE HIATT, citizens of the United States, residing at Plattsmouth, in the county of Cass and State of Nebraska, have invented certain new and useful Improvements in Photographic-Printing -Machines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in photographic printing machines or apparatus of thatclass used for printing a number of photographs from the same negative with a uniform exposure.

The object of the invention is to simplify and improve the construction and operation of machines of this character and thereby render them less expensive and more durable and eihcient.

Further objects of the invention are to provide improved means for holding and ad ustlng the negative with respect to the platen, improved means for supporting the sensitized element upon the platen, improved means for adjusting and operating the platen, an improved shutter and operating means therefor, improved means for controllingthe length of exposure, and im-' proved means for resetting the shutter mechanism. F

WVith the above and other objects in view, the invention consists of the combination of parts and the novel features of construction hereinafter fully described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a rear'elevatiom of the im proved photographic printing machine; Fig.

2'is a front elevation of the same; Fig. 3 is a View similar to Fig. 2 illustrating the op,

line 66 in Fig. 1.; Fig. 7 is a detail horizontal section taken on the plane indicated by the line 7-7 in Fig. 4.; Fig. 8 is a detail vertical section taken on" the plane indicated by the line 88 in Fig. 1; Fig. 9 is a detail ,plan view of the fan or mechanism for retarding the descent of the exposure con-, trolling member; Fig. 10 is a view of the bottom edge of the pressure back of the platen, the retractable support for the sensitized paper or element being partially broken away; Fig. 11 is a bottom plan view of theretractable support for the sensitized element; Fi 12 1s a detail section taken on the plane indicated by the line 1212 in Fig.

10; Fig. 13 is a detail view of the platen;

Fig. 14 is an elevation of the negative holder or slide; Fig. 15 is a top edge view of the same; Fig. 16 is a detail perspectiveof the slide having the shutter resetting arm; Fig. 17 is a detail view of the ratchet bar and its spring, for holding the adjusting lever for the negative slide; Fig. 18 is a front elevation of a shading attachment for the photographic printing machine; Fig. 19 is an inside view of the same removed from its support; Fig. 20 is a vertical sectional view through the attachment and its support; Fig. 21 isa horizontal sectional view through the same; and Fig. 22is a detail perspective of the adjustable stop for the sensitized sheet.

In the drawings 1 denotes a suitable support formed with an opening 2 through which either natural or artificial light is admitted to the negative N from which a plurality of photographic prints are to be made. While any suitable means may be provided for supporting and adjusting the negative at the opening 2, it is preferably carried by a holder 3 in the form of a slide having its strips 4 secured vertically upon the rear 7 face of the support 1 on opposite sides of the opening 2. The slide or holder 3 is adjusted by means of a lever 5 pivoted at one end, as at 6, to the support land having its intermediate portion connected by a resilient link or spring 7 to the slide. Said spring 7 has its lower end'pivoted to the lever and its upper end formed with an opening to receive a stud 8 arranged centrally upon the lower portion of the slide. The free or handle end of the lever projects through a vertical slot 9 formed in one of two brackets 10 hereinafter described, and it is engaged by ratchet teeth on a supporting bar 11 pivoted at one end, as at 12, and actuated by a spring 13 so that it will be normally engaged with the leverto support it in an ad- Patented Sept. 20, 1910.

' control the throw or swinging movement of i or plate 27 which is pivotally mounted and langularly adjustable and a su porting memupon the plate 27.

. its spring 13' will cause one of its ratchet .erates the platen. This lever is in the form portion of the platen. Said link has its for- ..bolt 29 serves to-pivotally support the late teeth to engage and support the lever in adjusted position. The negative is arranged over an opening of suitable size and shape in theslide 3 and has its lower corners dropped into undercut supporting blocks 14 of right angular-or other sha e and secured upon the rear face of the sli e. The negative is retained in said supports by two spring catches 15 secured at one end on op ositesides of the opening'in' the slide and a apted to have their other or free ends engage the edges of the negative. Y

16 denotes a movable platen for supporting a piece of photographic printing paper or any other sensitized element E and holding the same against the negative during the exposure. aid platen is pivoted for swinging movement and carries a pressure back 17 on which the sensitized element is supported. Said platen has a broad lower end provided at opposite points with ivot stud carrying plates 18 the pivot stu s of which are mounted for rotation in bearings 19 formed on the lower portions of the brackets 10, so that the reduced portion of the platen which carries the pressure back 17 may swing downwardly and rearwardly away from the negative. The brackets 10 which are arranged adjacent to the side edges of the\support 1 also serve to support the pivot or shaft 20 of a lever 21 which opof a bell crank having a long 'arm suitably shaped to provide a handle and a short arm 22 connected by a link 23 to the intermediate ward end .pivoted between spaced ears or. lugs of abracketplate 24 secured to the platen and its rear end is bifurcated to receive the arm 22 of the bell crank or lever,

the spaced arms of said fork .being provided with longitudinal series of alining openings 25 to receive a removable pivot pin 26 wherebythe length of the link 23 may be varied to the platen when thelever is operated.

The pressure back 17 is angularly. adjustable upon the front face of the platen so that the sensitized element E. may be properly positioned uponthe negative during the exposure, and it consists of a base member ber or plate 28 which is resiliently mounted 29 denotes a pivot bolt having its head counter sunk in the plate 27 and its threaded end projecting through an opening formed centrally in the reduced upper portion of the platen 16, a retaining and adjusting nut 30 beingarranged upon said threaded end, as shown in Fig. 5 of the drawings. The

upon the platen 16. The plate 28 is held away from the latter by a palr of coil springs 32 arranged upon guide pins or screws 33 and having their ends arranged in seats formed in the opposing faces of the

plates

27, 28 concentric with said screws 33. The

plate 27 adjacent its ends and are screwed plate 28 to move toward and from the plate 27 and the bolt' 29 permits said plates to swing or turn together upon the platen 16. The plate 27 is adapted to beclamped in an which passes through an arc-shaped slot 36 formed in the upper portion of the platen concentric with the pivot 29, the threaded end of said set screw being engaged with the threaded opening in the plate 27 as clearly shown in Fig. 5. When the set screw 35 is loosened, the pressure back may be adjusted angularly upon the platen and secured in ,suchposition by tightening said screw. If desired, the plate 28 maybe covered with rubber or felt. For the purpose of supporting the element E upon the plate 28 of the pressure back when the platen is in its retracted position or away from the negative tractable to permit the sensitized element to drop fromthe pressure back as the latter leaves the negative after an exposure; Said retractable support {37 is in the form of a tom edge of the plate 28 by means of headed screws 38 passed through elongated openings or slots 39 formed in the support 37. The slots 39 are of such length that when the support 37 is moved forwardly on the'bottom of the plate 28 its front edge will project sufficiently inadvance of the front face of said plate to receive the bottom edge of same and when moved rearwardly said front edge of the su port E will move frombeneath the sensitized element s 0, that the latter will drop from the pressure back. Two leafsprings 31 are arranged in recesses 34 in the plate 28 and have their upper ends secured in said recesses and their lower or free ends bearing against the rear edgepf the support 37 so as to project the same forwardly to an operative position. Said support 37 is adapted to be automatically retracted as the platen swings away from the ne ative by means of a lever 40 arranged in a s ot inthe platen and pivoted intermediate its ends therein, as shown at 41. The forward end of the lever 40 is formed with a catch hook 42 provided with a beveled end and adapted to the support or plate 37. The rear end of the lever 40 is disposed above the link 23 and is 27 and-to permit t to be adjusted angu arly adapted to be actuated by the same when'the into openings in the plate 28, as shown more i clearly in Fig. 7. The screws 33 permit the latter pass through tapered openings in the adjusted position by means of a set screw 35 a support 37 is provided and is made replate or strip slidably mounted on the bot the sensitized element E and support the engage -a beveled lug or projection 43 upon sensitized element whereby the latter may be readily placed in proper position upon the pressure back of the platen when the latter is retracted. This side 'stop 44 comprises a swinging arm projecting from an adjustable carrier 45 in the form of a sleeve longitudinally slidable upon a squared or fiat faced portion of a rock shaft 46. Said carrier sleeve 45 is made adjustable on the rock shaft to permit the stop arm 44 to be 1 positioned closer to or farther from one end of the pressure back according'to the size of the sensitized element to be printed, and

it is preferably retained in itsadjusted position by means of a spring pawl which en- 0 gages ratchet teeth or notches 48 formed on the shaft 46, as clearly shown in Fig. 9 of.

the drawings. The rock shaft 46 has at its ends reduced pivot studs or journals 49 mounted for rotation in hearing brackets 50 secured to the opposite ends of the plate 28 of the pressure back and said shaft is spring actuated in one direction by a spring 51.-

Said rock shaft is actuated in the opposite direction by. the movement of the platen 30 through the instrumentality of a cord or flexible element 52, one end of which is attached to the shaft 20 or any other stationary support and the other end of which is attached to and wound upon a drum 53 fixed to the rock shaft. The spring 51 actu ates the rock shaft to swing the stop arm 44 forwardly and downwardly against the pressure back when the platen moves away from the negative and when the platen moves forwardly toward the negative the unwindingof the cord 52 from the drum 53 causes the latter, and hence the rock shaft, to rotate against the tension of its spring to swing the stop arm 44 upwardly and rearwardly to a retracted position. The shaft 20 for the operating lever or bell crank 21 is preferably removably mounted by engaging one of its ends with a flanged cup-shaped bushin 54 arranged in a bearing in one of the bradlkets 10, as shown in Fig. 6, and engaging its other end with a flanged sleeve-like bushing 55 arranged in abearing in the other bracket 10. The bushing 54 prevents endwise movement of the shaft 20 in one direction and to prevent such movement in the other direction a stop collar 56 is arranged on the shaft and held against the flange of the bushing 55 by a set screw 57, as more clearly shown in said Fig. 6; By mounting the shaft 20 in this manner, it will be seen that it may be removed without the necessity of unscrewing the brackets 10 from the supportl.

For the purpose of admitting light through the opening 2 and to the negative by gravity and they are held elevated and successively released by means of a supporting and controlling lever 62 which is pivoted intermediate its ends at 63 in a supporting bracket 64. The lower end of the lever 62 has two supporting shoulders in the form of

hooks

65, 66, the latter of which is arranged above the former and made of reater length, for a purpose presently exp ained. Said hooks 65, 66 are so arranged that they will engage

pins

67, 68 provided, respectively, on the

shutters

58, 59, the in 67 being arranged adjacent to the top or the shutter 58 while the pin 68 is arranged adjacent to the bottom of the shutter 59. The hooks engage said pins when the shutters are elevated, as shown in Fig. 2, upon reference to which it will be seen that the lower shutter 58 closes the opening 2 in the support 1. When the lever 62 is shifted to cause the hook 65 to disengage the pin 67 the lower shutter 58 will drop, as shown in Fig. 3, so as to expose the opening 2 and thereby expose the negative to the light, but the hook 66, being longer than the hook 65, will still. support the pin 68, as shown in said Fig. 3, until the lever 62 is shifted from its full line position in said figure to its dotted line position, whereupon the hook 66 disen 'ages t-he'pin 68 and the upper'shutter 59 drops down upon the lower shutter and closes the opening 2, thereby terminating the exposure. The lower shutter 58 when it drops rests upon a stop pin 69 arranged at asuitable point upon the support.

The lever 62 is adapted to be actuated to its two positions to drop the lower and upper shutters successively by means of a controlling member 70 in the form of a bar arranged for vertical sliding movement and carrying two

pins

71, 72 adapted to successively engage the cam-shaped end73 of a trip lever 74 pivoted intermediate its ends at 75 on the bracket 64 and having its other end connected by a link 76 to the upper end of the shutter supporting and controlling lever 62. The member or bar 70 which controls the length of the exposure has grooved edges arranged for sliding movement in an is made longitudinally adjustable on the cam;

trolling or timing bar 70 by removably' nalecl in a suitable bearing 81 on the top of mounting it in any one of a longitudinal ,series of openings 78 formed in said bar.

the hook 66 of the lever 62 to disengage the pin 68 and thereby allow the upper shutter to drop to terminate the exposure.-

For the purpose of regulating the downward movement of the controlling member or' bar 70 a retarding or cushioning device is provided, the same preferably consisting of a rotary fan 80 arranged on a shaft jourthe support 1 and having fixed upon one of I upon it and confined between a shoulder or head 94 and an angle bracket 95 which its ends a pinion 82 which meshes with a gear 83. The latter is loose upon a shaft 84 journaled in a bearing 85 and it carries a spring pressed pivoted'pawl 86 which engages a ratchet wheel 87 fixed to the shaft 84. Fixed to'the latter is also a pinion 88 which meshes with rackteeth 89 formed in one of the edges of the upper portion of the controlling member or bar 70. 'It will be seen that as the member or bar moves downwardly its rack89 will rotate the shaft 84 and the pawl and ratchet

connection

86, 87 will thereby lock the gear 83 to the shaft 84 and the fan will be rotated to retard or cushion the downward movement of said controlling member. The pawl and ratchet

connection

86, 87 permits the controlling member or bar 70 to be raised or reset, as presently explained, without rotating the The movement of the controllingv member or bar 70 is controlled by the movement of the platen 16, as will be seen upon reference to Fig. 8 of the drawings. This control is effected by means of a dog 90 in the form of a bell crank pivoted at its angle,'as at 91,

in the lower. portion of the slot 79 and having one end projecting upwardly and beveled to provide a biting jaw to engage the member or bar 70. The rearwardly projecting end or arm of the dog 90 is pivoted to the upper end of a vertically. slidable releasing rod 92 which is actuated in an upward direction-by a coil spring 93 arranged serves as the upper guide for said rod.- The lower end of the rod 92 has a slotted portion 96 which receives a guidepin or screw 97 in aplate-secured to. the rear face of the support l-fat "a point adjacent to the pivot of the platen. On said lower portion of the rod 92 is projection or lug 98 adapted to be-engaged and actuated by a trip 99 in the face of the platen. It will be seen that when the platen is swung upwardly said trip pro-v jection 99 Will engage the lug 98 and move the releasing rod 92 downwardly, thereby re tracting the dog 90 from engagement with the controlling member or rod 70 so that controlling member or bar, said means con-.

sisting of a slide 100 arranged between the similar guide strip 101, and having a rearwardly projecting arm 102 working in a vertical slot 103 in the support 1. Said arm 102 is connected by a link 104 to a bracket arm 105 secured to the platen adjacent to lower portion of the guide strip 60 and a.

form of an angle plate securedto the front when. the latter is released it may move its pivoted end. Pivoted to the rear face of the slide 100 is a link 106 which connects it to the intermediate portion of a lever' 107 fulcrumed at one end, as shown at 108.

- The other end of said lever 107 is connected by a link 109 to a slide 110 arranged in the undercut guides 61, 77 and adapted to engage the ldwer end of the controlling member or bar 70 and .to move the latter upwardly to its reset position. The slide 110 carries a lifting arm 111 arranged in the path of a pin 112 secured to the lower portion of the lower shutter 58. Owing to these link and lever connections, it will be seen that when the platen 17 is swung rearwardly away from the negative the arm 105 will cause the link 104 to elevate the slide and the latter will cause the link 106 to' lift the lever 107 which inturn will elevate the slidellOL Said slide 110 will lift the controllingmember or bar 70 to its elevateding arm 114 in the lever 62, thereby swinging said lever .to cause its

hooks

65, 66 to swing underthe pins 67, 68.

lows: Assuming the shut-tersto be closed, as shown in-Fig. 2, and the platen to. be in its retracted position, a piece of photographic paper or any other sensitized element is placed upon the pressure back and engaged The operation of the invention is as fol- I with the projecting support or bottom rest 37 and the side stop 44. which latter is in contact wlth the. pressure back when the support-of the machine and 2 the opening platen is retracted but is swung upwardly out of the way when the platen is projected to hold the paper against the negative. The handle end of the lever 21 is then swung downwardly so that the link 23 swings the platen forwardly and causes the pressure back to press the sensitized element against the negative. When the-platen moves forwardly the stop arm 54 is retracted, as above explained, and the hook 42 of, the catch lever 40 slips under and engages the projection 43 on the retractable support 37. The'forward movement of the platen causes the trip 99 to operate the rod 92 and retract the dog 90, thereby releasing the controlling member or bar 70 which-begins to descend under the control of the rotary fan 80. Shortly after the controlling member or bar 80 begins to descend its pin 71 actuates the trip lever 74 and the latter through the link 76 shifts the lever 62 to cause its hook 65 to release the pin 67 of the shutter 58, which latter then drops to expose the negative to the light and begin the exposure. When the pin 72 reaches the lever 74the latter is again actuated and shifts the lever. 62 to a greater extent so as toretract its hook 66 from engagement with the pin 68, whereupon the upper shutter 59 will drop to close the opening 2 and terminate the exposure. The lever 21 is then swung upwardly to retract the platen. As the latter is swung rearwardly or away from the negative the hook 42 of the catch lever 40 locks the support 37 to the rear plate 27 of the pressure back while the springs 82 project the front plate 28 of said pressure back, thereby causing the support 77 to assume its retracted position and allowing the sensitized element E to drop from the pressure back. The con tinued rearward movement of the platen causes the link 23 to engage the rear end of the catch lever 40 and actuate it upwardly to swing its hook 42 downwardly and out of engagement with the projection 43 on the support 37, whereupon the springs 31 will pro ect said support to a position ready -to receive the next sensitized element. As the platen swings rearwardly the side stop arm 44 swings forwardly and downwardly to an operative position. Said movementof the platen also causes the arm 105 which it carries to actuate the

slides

100, 110 throu h the link and lever connections above descri ed so that the upward movement of the slide 110 will move the controlling member or bar to its elevated or reset position and the arm 111 of said slide will lift the to theirelevated or reset posithe machine above described the shading mechanism shown in Figs. 18 to 21 inclusive of the drawings, in which 1 denotes the negative at sa-i through which light is admitted to the negative. This attachment comprises a suitable casing 11 arranged over the front of the support 1 and having an opening I) of substantially the same size and shape as the opening 2 opposite whichit is disposed.

0, d, e, f denote, respectively, side and bottom and top curtains which are so mounted as to provide movable screens or shades which may be adjusted to permit any portion of the negative to be covered or shaded.

While curtains of any suitable construction may be employed and any suitable operating means may be provided therefor, I preferably employ flexible curtains wound upon spring actuated rollers similar to window shade rollers, the spindles of the rollers 9 being journaled in suitable brackets or bearings 72. arranged within the casing a adjacent to the four corners of the opening 5. The curtains or shades a, (Z, 6, f project or pass through slots 2' formed in the front wall of the casing a and their free edges are reinforced by stiffening bars j. -The two side curtains c, d are connected by links 7: to the lower ends of operating levers Z,"7Ib

pivoted intermediate their, ends on pivots n projecting from the front ,face of the casing a, the upper ends of said levers pro ecting .above the casing and being shaped to provide handles. The reinforcing bar of the upper curtain is connected by a link 0 to one arm of a bell crank lever p which is pivoted at its angle at The reinforcing bar of the bottom curtain e is connected by two cords r of a connecting bar swhich is in turn connected by a linkt to a bell crank u' pivoted at its angle on the pivot end. it will be seen upon reference to Fig. 18 that the four levers Z, m, p and u pro ect above the top of the casing so that they may be .readily manipulated to project one or more ofthe curtains and thereby shade or cover up any portion of the negative disposed opposite the openings 2 and b.

While the preferred embodiment of the invention has been shown and described in detail it will be understood that various changes in the form proportion, arrangement and details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention. 1

Having tlius described the invention what is claimed is:

1. In a photographic printing machine, the combination of an upright support having an openin means for supporting a opening, a movable platen having means for supporting a sensitized element, guides, superposed shutters slidably arran ed in said guides, a support ng means for %lie shutters, a trip for actuating said shutter supporting means to successively release said shutters, a slidably mounted timing bar, and means upon the latter to successively engage and actuate said trlp,

2. In a photographic printlng machine, the combination of an upright support having an opening, -'-means for supporting a negative at said opening, a movable platen having means ,for supporting a -sens1t1z ed element, guides, superposed shutters slidably arranged in said guides, a support ng means for the shutters, a trip for atcuating said shutter 'supporting means to successively release said shutters, a slidably mounted timing bar, and adjustable means upon the latter to successively engage and actuate said trip.

3. In a photographic printing machine, the combination of an upright support having an opening, means for supporting a negative at said opening, a movable platen having means for supporting a sensitized element, guides, superposed shutters slidably arranged in said guides, a supporting means for the shutters, a trip for actuating said shutter supporting means to successively release said shutters, a slidably mounted timing bar, and pins upon said timing bar to successively engage and actuate said trip. v

4. In a photogra hic printing machine, the combination of a support having an opening, means for supportin a negative at said opening, a lever for adjusting said negative supporting means, means for hold: ing-said lever in adjusted position, a shutter mechanism at said opening for controlling the admission of li ht 'to the negative, a movable platen, an said platen.

5. In a photographic printing machine, the combination ofa support having an opening, means for supporting a negative at said opening, guides in which said nega-- tive supporting means is slidably mounted, an adjusting lever, a link connecting said lever to the negative supporting means, a spring pressed ratchet bar for retaining-the lever in adjusted position, a movable platen, means for operating the same and means for controlling the admission of light through said openingto a negative. 1

6. .In a photographic printing machine, the combination of a support having an opening, means for supportinga negative at said opening, a movable platen, a resiliently supported pressure back on said platen, a

sensitized element support carried by the pressure back, a spring for projecting said element support,means on the platen to engage said element support when the platen ismoved in one direction, and means for automatically operating said engaging means to release the element support when the platen is moved inthe opposite direction. 7. In a photographic printing machine,

the combination of a support having an said opening, a movab means. for actuating platen, and a retractable side sto opening, means-for sup opening, means for supporting a negative opening, meansfor suppoiitipg a; negative tit p a en 0 swlng said openin a pivote ward and rom the negative, a bell crank mounted on said support and disposed in a plane at right angles to the platen, said bell crank having a handle at one end, a link. having one end pivoted to the platen and an adjustable connection between the other end of the link and the other end or arm of the bell crank.

9. In a photographic printing machine,

lthe combination of a support having an ope ng, means for supporting a negative at e platen, a pressure back having means for supportinga sensitized element, and means whereby said pressure back may be adjusted angularly upon the platen.

10. In .a photographic printing machine, the combination of a support having an opening, means for sup orting a negative at said opening, a mova e platen, a pressure back pivoted to the platen to swing angularly thereon and having means for supporting a sensitized element, and a set screw for retaining the pressure back in adjusted position. Y

11. In a photographicprinting machine, the combination of; a support having an opening, means for su said opening, a mova e laten, means for supporting a sensitized e ement upon said for the sensitized element'carried by the p aten and controlled by the movement thereof. 12. In a photographic printing machine, the combination of a support having an said opening, a movab e platen, means for supporting'a sensitized element upon the platen, a retractable side sto for the sensitized element carriedbythe p aten and means for adjusting, said side stop longitudinally of the platen.

rting a negative at orting a negative at 13. Ina photographic printing machine,

the combination of a support having an opening, means for sup orting a negative at said opening, a movab e platen, means for supporting a sensitized element upon the platen, a' rock shaft, a spring for actuating the shaft in one direction, 'a'flexible element fixed at one end and having its other end attached to and wound upon saidshaftgigand a side sto arm lon 'tii dinall adjustaifle'on p g} y said rock shaft and ada ted to swing toward and from the sensitized element supporting means on the platen as the latter is operated.

14. In a photographic printing machine,

the combination of an upright'support having an opening, means for supporting a negative at said opening, a movable platen adapted to release the timing bar when the platen is projected to an operative position and to engage the same when the platen is retracted.

15. In a photographic printing machine,

the combination of an upright support having an openin means for supporting a negative at sai opening, a movable platen having means for supporting a sensitized element, guides, superposed shutters slidably arranged in said guides, a supporting means for the shutters, a trip for actuating said shutter supporting means to successively release said shutters,a slidably mounted timing bar, means upon the latter to engage and actuate said trip, a spring actuated gripping device for the timing bar controlled by the platen and a slide actuated by the platen and adapted to engage and reset the timing bar.

16. in a'photographic printing machine, the combination of an upright support having an opening, means for supporting a negative at said opening, a movable platen having means for supporting a sensitized element, guides, superposed, shutters slid ably arranged in said guides, a supporting means for the shutters, a trip for actuating said shutter supporting means to successively release said shutters, a slidably mounted timing bar, means upon the timing bar to engage and actuate said trip, a slide to en'- gage and actuate the timing bar to, reset the same, means actuated by the platen for operating said slide and means upon said slide to co-act with said shutters to reset the same.

17 In a photographic printing machine, the combination of an upright support having an opening, means for supporting anegative at said opening, a movable platen having means for supporting a sensitized element, guides, superposed shutters slidably arranged in said guides, a supporting means for the shutters, a trip for actuating said shutter supporting means to successively release said shutters, a slidably mounted timing bar, means upon the timing bar to engage an actuate said trip, a retarding device operatively connected to said timing bar, a spring actuated gripping device to co-act with the timing bar and controlled by the movement of the platen, a slide to engage and actuate the timing bar to reset position, means actuated by the platen for operating said slide and means upon the slide to co-act with said shutters to reset the same.

18. In a photographic printing machine, the combination of a support having an opening, means for supporting a negative at said opening, a platen movable toward and from the negative, a pair of superposed shutters slidably mounted for movement over said opening in the support and adapted to drop by gravity, a supporting means for the shutters adapted to successive y release them, a slidable. timing bar for operating said shutter supporting and releasing means, a

slide to engage and actuate said timing bar a ,to reset position and meansactuated by the platen for operating said slide.

19. In a photographic printing machine, the combination of; a support having an opening, means for supporting a negative at said opening, a platen movable toward and from the negative, a pair of superposed shutters slidably mounted for movement over said opening in the support and adapted to drop by gravity, a supporting means for the shutters adapted to successively release them, a slidable controlling member for operating said shutter supporting and releasing means, a resetting slide to engage and actuate said member and carrying means for engaging and actuating the lowermost shutter, a lever for actuating said slide and means actuated by the platen for operating said lever.

20. In a photographic printing machine, the combination of a support having an opening, means for supporting a negative at said opening, a platen movable toward and from the negative, a pair of superposed gravity actuated shutters arranged at said opening in the support, pins upon said shutters, a supporting and releasing lever having two .hooks to engage said pins on the shutters, and means for sucessively operating said lever in the same direction to cause said hooks to successively release their pins,

21. In a photographic printing machine, the combination of a support having an opening, means for supporting a negative. at said opening, a platen movable toward and from the ne ative, a pair of Sn erposed gravity actuate shutters arrang at said opening in the Support, pins upon said shutters, a supporting and releasing lever having two hooks to engage said pins on the shutters, means for successively actuat ing said lever in thesame direction to cause itshooks to successivelyrelease the shutter pins, means for resetting the shutters, and

." tio av g an opening, means for supportinga negative at said open1ng, 'a

means carried by one of the shutters for actuating the lever in the opposite direction to cause its hooks to engage the first mentioned pins when the, shutters reset position.

22. In a photographic printingl machine, the combination of a support aving an opening, means for supporting a negative at said opening, a platen movable toward and from the negative, a shutter mechanism for the opening in said support, a releasing member for said shutter mechanism, a slidable controlling member, pins on said controlling member for engaging said releasing member, and means whereby one of said pins may be adjusted longitudinally'on the controlling member. a

23. In a photographic printing machine, the combination of a support having an opening, means for'supporting a negative at said opening, a platen movable toward and from the negative, a shutter mechanism for controlling the admission of light'through the opening in said support, a sliding controlling bar for the shutter mechanism adapted to move downwardly by gravity and controlled by said platen, a rack upon said bar, a pinion in mesh with said rack, a rotary fan and a pawl and ratchet connection between the shafts of said fan and pinion.

are in their 24. In a photographic pi'inti'n machine,

the combination of a support aving an I opening, means for su porting a negative i 35 at said opening, a mova levplaten, means for supporting a sensitized element upon the Y platen, a rock shaft carried by the platen,

a spring for actuating said shaft in one di-' rection, a flexible'element fixed at one end and having its other end attached to and wound upon said shaft and a side stop arm on said shaft and adapted to swing toward and .from e sensitized element supporting means on the platen as the latter isioperated 25. In' a photographic printin*machine, the combination of a support aving an opening, means for supporting a negative at said opening, a platen movable toward and from the negative, a pairvof superposed shutters slidably mounted for movement over said opening in the support and adapted to drop by, ravity, a supporting means for them, a slidable timing said shutters adapted to successiveIy release bar having means or successivel operatlng said shutter supporting and re easmg means and means conv trolled by the movement of the platen for engaging and releasing said timing bar.

26. In a photographic printin machine, thecombination of a support ivote platen movable towardand from t e negative, a pair of superposed shutters slidably mounted for move- .justably mounted in said t' ment over said opening in the support and actuated element on said support, a pivote dogoperated by said element and adapted to engage said timing bar, and a trip projection on said swinging platen to engage and.

actuate said element.

27. In a photographic-printing machine, the combination of an upright support having an opening, means for supporting a negative at said 0 ening, gui es, u lower shutters slidable in said 'ui es, a supporting pin on each of said shutters, a resetting pin 011 the upper shutter, a pivoted per and lever having long and short hooks'to engage the supporting pins on the two shutters, and an arm or lug to co-act with said resetting pin, means for actuatin said lever to cause the hooks to successive y release the shut- .ters, and means for engaging and elevating the lower shutter to cause it to raise the upper shutter and to move the resetting pm upon the latter into engagement with the resetting arm or lug on said lever.

28. In a photographic printing machine,

the combination of an upright support having an opening, means for supporting a negative at said opening, guides, upper and lower shutters in said guides, a supporting pin on each of said shutters, a resetting pin on each of said shutters, a lever having long and short hooks to co-act with said supporting pins on the shutters, said lever also having an arm or projection to co;act with'the re-' setting pin on the u per shutter, and means for actuating said ever, a slide having an arm to co-act with the resetting pin on the lpuier shutter and means for actuating said 5 1 e.

29/111 a photographic .printin the combination of a a support I;

machine, aving an opening, means for supporting a negative at "said opening, a shutter mechanism for controlling the admission of light through said opening, said mechanism including a tri lever, a slidable timing bar and a pin .a

barto engage and actuate saidtrip lever. f

30. A shading mechanism for a photographic printing device comprising a casing avlng an opening, to admit light to a negative, -spr ii3g actuated rollers arranged at the topgbottoraand sides of said opening and within firecasing, curtains upon said rollers and havingreinforcing bars at their freeedges,-a palr of upright levers pivoted intermediate their ends on the exterior of the easing and having their upper handle ends projecting above the caslng, links connecting the lower ends of said levers to reinforcing bars of the two side curtains, a bell crank lever pivoted at its angle on the casing and having a handle at its upper end, a link connecting the lower end of said bell crank lever to the reinforcing bar of the upper curtain, a horizontal bar, flexible elements between the ends of said bar and the reinforcing bar of the bOttOlll curtain, a second bell crank pivoted at its angle on the casing 10 and having a handle at its upper end, and a link connecting the other end of the second mentioned bell crank to said horizontal bar.

In testimony whereof we hereunto afl'm our signatures in the presence of two Witnesses. v

GUSTAVE R. OLSON. DEMMIE HIATT. \Vitnesses CHARLES Hn'rr, GRETCHEN 1)01\'NELLY.