US2359784A

US2359784A - Photographic reproduction apparatus

Info

Publication number: US2359784A
Application number: US431138A
Authority: US
Inventors: Paulas John
Original assignee: PHOTO REPRODUCING EQUIPMENT CO
Current assignee: PHOTO REPRODUCING EQUIPMENT Co
Priority date: 1942-02-16
Filing date: 1942-02-16
Publication date: 1944-10-10
Anticipated expiration: 1961-10-10

Description

OCL'IO, 1944. J. PAULAS 2,359,784

- PHOTOGRAPHIC REPRODUCTION APPARATUS Fild Feb. 16, 1942 4 Sheets-Sheet 2 lNVE NTOR:

' JbfinPaaZas BY ATTORNEY Oct.1( ),1944. LAS 2,359,784

PHOTOGRAPHIC REPRODUCTION APPARATUS Filed Feb.. 16, 1942 4 Sheets-Sheet 3 INVENTOR:

BY 10/272 Paulas Kora Oct. 10, 1944. A LAS 2,359,784

PHOTOGRAPHIC REPRODUCTION APPARATUS Filed Feb. 16, 1 942 4 Sheets-$heet 4 I'NVENTOR 10h; jauza's ATTORNEY Patented Oct. 10, 1944 PHOTOGRAPHIG REPRODUCTION APPARATUS John Paulas, Chatham Township, Morris County,

N. J., assignor to Photo Reproducing Equipment Company, Chatham Township, Morris County, N. J.

Application February 16, 1942, Serial No. 431,138

'10 Claims.

My invention relates to photographic apparatus, and more particularly to photographic reproduction apparatus of the type used for making photographic prints by reflex reproduction methods.

One object of my invention is to provide a photographic reproduction apparatus, by means of which clear, sharp positives and negatives can be readily made from objects of any kind.

Another object of my invention is to provide a photographic reproduction apparatus equipped with an illuminating device, which may be for a predetermined period of exposure.

' A further object of my invention is to provide a photographic reproduction apparatus having an illuminating device, which may be supplied with current from a network or from a battery.

Another object of my invention is to provide a photographic reproduction apparatus, the main portions of which may be readily. taken apart from each other for a convenient storing and carrying around.

My invention consists in certain novel features of a photographic reproduction apparatus as will be fully described hereinafter.

Further objects and advantages of the invention will beapparent from the following description considered in connection with the drawings, in which:

Fig. 1 is. a perspective view of a photographic reproduction apparatus according to the invention, a portion of the cabinet being broken away,

Fig. 2 is a cross-sectional view of the apparatus shown in Fig. 1, taken on line 2-2 of Fig. 1,

Fig, 3 is a fragmentary cross-sectional view of the apparatus .taken on line 3-4 of Fig. 2 illustrating the time delay switch,

Fig. 415 a fragmentary'iront elevational view of the lower left hand portion of theapparatus shown in Fig. 1,

Fig. 5 is an exploded perspective view of parts of the time delay switch,

Fig. 6 is a diagrammatical view of the wiring system of the illuminating device of the apparatus shown in Fig. 1, g

Fig. 7 is an elevational view of a. different embodiment of a photographic reproduction" apparatus; according to the invention, a portion of the apparatus being broken away,

Fig. 8 is a sectional view of the casing of the apparatus shown in Fig. 7 containing the rilluminating device, takenon line 8-8 of Fig. 7,

Fig, 9.is a sectional view of the'casing shown aken on line 9-9 of said Fig. 8, and :a-se'ctional view of the casing shown in Fig. 8, taken on line iii-Ill of said Fig. 8, the reflector being omitted.

Referring now to Figs. 1 and 2, it generally indicates the cabinet of a photographic reproduction apparatus having a cover 22 connected with the cabinet by means of disengageable hinges 25.

A casing 26 for the reception of a supply roll 28 of sensitized paper is mounted on the upper portion of the cabinet 26, and a plate 3E3 of transparent or translucent material is arranged flush with the upper surface of the casing 26. The plate 38 may be made of a sheet of plate glass painted or sprayed or enameled with whit or opal lacquer, for example.

The object to be reproduced and a piece of sensitized paper torn off from the end of the supply roll 28 extending through a slot 32 of the casing 26 may be placed in contact with each other upon the plate 3@.

' The underface 34 of the cover 22 has a flexible covering preferably made of felt 36 with a rubber padding 38. The underface 34 is subjected; to

the action of a plurality of springs 40 arranged inside the cover. When the cover 22 is closed and held in its position by the pull clasps 42, the ele ments of which are mounted on the outside of the cover and the cabinet, the object and the piece of sensitized paper are tightly pressed against each other by the combined action of the pull clasps 42 and the springs fill.

A base 44 secured to the walls of the cabinet serves to carry the lamp receptacles it, d8, 56, 52 of the illuminating device arranged below the platew.

An exchangeable color filter 5t passing through a slot 56 in a wall of the cabinet is slidably arranged on guides 58 between the plate 36 and the illuminating device. The filter 54 may be used, if it is necessary to change the color of the light rays emanating from the bulbs inserted into the lamp receptacles.

A time delay switch 60 for the circuits of the of! substantially white light; the set of lamp receptacles 48 serves for the reception of photoflood lamps 68; the set of lamp receptacles 50 serves for the reception of colored lamps l0 givor closing position.

ing off substantially amber colored light; and the set of lamp receptacles 52 serves for the reception of battery lamps I2.

The sets of

lamp receptacles

46, 48 and 50 carrying the

lamps

66, 68 and I are arranged in a circuit I4 comprising an outlet I8 mounted on a side wall of the cabinet for connection with an electric source of high voltage, for example a conventional network. The set of lamp receptacles 52 carrying the lamps I2 is arranged in a circuit 18 supplied with current of low voltage from a battery 80 mounted on the false bottom 62 of the cabinet.

As best shown in Fig. 3, the time delay switch 60 comprises two

mercury switches

82 and 84 mechanically coupled with each other. According to Fig. 6, the mercury switch 82 is arranged in the circuit 14, and the mercury switch 84 is arranged in the circuit I8. The

mercury switches

82 and 84 are coupled with each other in such a way, that they are simultaneously in opening Furthermore, the circuit I4 comprises a first change-over witch 86 and a second change-over switch 88. The first switch 86 has three

terminals

90, 92 and 94. The terminal 90 is connected with the second switch 88, the terminal 92 is connected with the set of photoflood lamp 88, and the terminal 94 is a dead terminal. The terminal 98 of the second switch 88 is connected with the set of lamps 66 giving oil a. substantially white light, while the terminal 98 of said second switch 88 is connected with the set of colored lamps I0. As will be easily understood from the showing of '-Fig. 6, depending on the position of the switches lamps I2. The switch I 00 is coupled with theswitch 88 in such a way, that it may connect the set of battery lamps I2 with the battery 80 only.

when the switch 86 contacts the dead terminal '84, i. e. when neither one of the three sets of

lamps

66, 68, I0 is connected with a source of current.

The mechanism of the time delay switch 60 is best shown in Figs. 3-5, The two

mercury switches

82 and 84 are carried by a support I 08 tiltably mounted at IIO on a post II2 secured to the false bottom 62 of the cabinet. An upwardly extending arm I I4 of a member II6 tiltably mounted on the post H2 at H8 is in engagement with a fork-like portion I20 of the support I08. A reciprocable controlling lever I22 rotatably mounted on a stud I24 arranged on a post I26 secured to the false bottom 62 is connected with said tiltable member II6 by means of a link I28 slidably passing through a hole I30 of the member II6. One end of said link I28 is pivoted.

to the controlling lever I22 at I32, the other end of said link has a hook-like portion I34 for engagement with the member II8 when the controlling lever I22 is at a certain distance from the member II6. A spring I 36 stretchedbetween the controlling lever I22 and the post II2'tends to hold the lever I22 and the

mercury switches

82, 84 connected with saidlever in the inactive position shown in Fig. 3. The circuits I4 and 8 comprising

th mercury switches

82 and 84 are open in said position of the time delay switch. A spring I38 stretched between the tiltable member II 6 and the false bottom 62 tends to turn the member I I6 in counter-clockwis direction a viewed in Fig. 3, but the action of the spring I36 is stronger than the action of the spring I38, so that the parts remain in the position shown in Fig. 3 as long as the controlling lever'i not actuated.

The reciprocable controlling lever I22 has a slot I40, which is in engagement with a pin I42 secured to a reciprocable rack I44 in mesh with a pinion I46 of a clockwork I48 having a spring I49 and a retarding mechanism I50. The free end of the controlling lever I22 extend through an opening I 52 in the wall of the cabinet and through a slot I54 of a plate I56 attached to the outside of the wall of the cabinet. When the controlling lever I22 is depressed against the ac tion of the spring I36, the clock-work is wound up and the member H6 and the support I08 carrying the mercury switches 82 and 84 are tilted by the action of the spring I38, until the switch 82 abuts against the wall of the clock-work and the mercury switches are in the operative position 82, 84' indicated by dash lines. Now, the circuits I4 and I8 are ,closed. The stroke of the controlling lever I22, however, may be continued and the lever may be depressed further down, for example into the position shown in Fig, 5, as the link I28 may slide through the hole I 30 of the member II6 now held in its position. When, after the performance of this stroke, the controlling lever is released, the combined action of the clock-work I48 and the spring I36 return the the spring I36 into their initialposition shown in full lines in Fig. 3, so as to interrupt the circuits I4 and I8. Obviously, the interval of the closure of the circuit I4 and I8 by the operative position of the mercury switches 82 and 84 is controlled by the combined action of the spring I36 and the spring [48 and the retarding mechanism I50 of the clockwork I48 in dependence on the stroke of the controlling lever I22. The greater the stroke of the lever I22, the longer the interval. i. e. the longer the time of exposure of th sensitized paper.

The stroke of the lever I22 may be limited by an adjustable limiting rod I58. The hooklike end I60 of said rod is slidably arranged on the lever I22, and a spring I82 stretched between said hook-like end and the pin I24 tends to draw the limiting rod to the right as viewed in Fig. 3. The free end of the limiting rod' extends through the opening I52 of the wall of the cabinet and through the slot I54 of the plate I56. The cylindrical portion I64 of an adjusting knob I66 screwed on the free end of the rod I58 may be inserted into either one of the adjusting recesses I68 of the slot I54. The spring I 62 tends to urge the collar II0 of the knob I88 against the plate I56 so as to hold the rod in its position. The knob I66 is in the path of the controlling lever I22 when the latter is depressed, whereby the stroke of the lever I22 is limited. If it is desired to change the stroke of the lever I22 for a change in the time of exposure of the sensitized paper, the limiting rod I58 is drawn for disengagement of its cylindrical portion I64 'from a recess I66 until the knob reaches the dash and dot line position shown in Fig. 3, whereupon, after the placing of the knob for engagement with a different recess, the limiting rod is released. Preferably, a scale is arranged on the plate I56 next to the recesses I60 indicating various times of exposure so as to facilitate the setting of the desired time of exposure by placing the .knob I66 of the limiting rod I58 into the proper recess I68.

According to Figs. 3 and 4, the clock-work I48 is provided with an adjusting lever I'I2 pivoted at I" and subjected to the action of a spring I16 tending to hold the lever in the position shown in said figures.

The lever I12 extending through the opening I52 of the wall of the cabinet and through a slot I18 of the plate I56 is arranged for influencing the action of the retarding mechanism I50 of the clock-work. If the adjusting lever H2 is depressed against the action or the spring I16, the'speed oi the clockwork and consequently the speed of the return movement of the controlling lever I22 is in-.

engaging the parts of the disengageable hinges 24 from each other, so that the large objects may be placed on the plate 30.

Figs. 7-10 illustrate a different embodiment of a photographic reproduction apparatus comprising the three

main portions

200, 202 and which may be easily assembled by the user. 20c

indicates a four-sided hollow body or stand gradually tapered as it rises and open at both ends. Two opposite walls of the body or stand .260 are provided with flaps 206 foldably arranged at the longitudinal edges of the walls. The two actuation of the controlling lever I22 causes a;

tensioning of the spring I49, and, upon a release of the lever I22, the spring I49 drives the 'mech-- anism of the clock-work for returning the lever, I22 into its original position under the control of the retarding mechanism; the spring I36 also stretched during the actuation of the lever I22 assists in thereturning of the lever. If desired, however, the clock-work I48 may be replaced by a retarding mechanism alone, which has no spring for returning the lever I22 into its original position. In such a case the spring I36 alone would cause the return movement of the lever I22 under the control of the retarding mechanism; inother words, the spring I36 in combination with the retarding mechanism would act like a clock-work. Y

As best shown in Fig. 1, an indicator I80 preferably made of red glass is inserted into the front wall of the cabinet, so that the user of the apparatus may easily recognize whether or not the lamps of the illuminating device are in operation.

The various sets of

lamp receptacles

46, 40, 50, 52 are arranged in such a way on the base 44, that an even distribution of the light emanating from the lamps is obtained. For a better reflectidn of the light, the inside walls of the cabinet 20 may be painted white and the lamp receptacles may be made of white porcelain.

If desired, one or more sets of lamp receptacles may be omitted, so that, for example, the apparatus has only incandescent lamps giving ofl a substantially white light and photoflood lamps, or incandescent lamps giving 011' a substantially white light and battery lamps, or inv let could be provided in the circuit I0 for connection' with a separate portable battery.

Ii large objects are to be reproduced, the cover 22 may be taken away from the cabinet by disother walls of the body 200 are attached to said flaps by pins 200 or the like. Thus, the walls of the body 200 may be folded upon each other, when the

main parts

200, 202, 204 of the apps.- ratus are taken apart, so that the body 200 may be readily stored away in a flat condition. when the apparatus is used, the body 200 is unfolded as shown in Fig. 7 and is placed with its lower end on the plate 202 of transparent or translucent material, such as a plate of glass or plas tic material, which fits into the open end of the body 200 and rests on a piece 259 of sensitized paper placed on the object NZ to be reproduced, for example a page of a book. Furthermore, the casing 204 containing the illuminating device is placed onto the edges of the upper end of the body or stand 200..

Two batteries 2M and H6 are inserted into holders 2I6, 220, 222, 224 ,secured to a wall or the-casing 204. The holder 286 is connected with a first terminal 226 of armain switch-223 by a conductor 230, the holder 220 is connected with the holder 225 by a conductor 232, and the holder 222 is connected with a first pole 234 of a lamp receptacle 236 by a conductor 238, as best shown in Fig. 10. The second terminal 240 of the main switch 226 is connected with a first terminal generally indicated by 242 of a time delay switch generally indicated by 256 by means of a conductor 246. The second terminal 2% of the time delay switch is connected with the second pole 250 of the lamp receptacle 236 by a conductor 252. I

The first terminal 242 of the time delay switch 244 comprises a resilient base 254 and a contact arm 256 pivotally mounted on said base at 256. One end 260 of said base 254 is secured to a stationary member 262 of the switch attached to a wall of the casing 204 as best shown in Fig. 9. The other end 264 of said resilient base tends to stay away from the member 262 and may be urged-toward said member by means of an. adjusting lever 266 engaged with said end 264,.and pivotally mounted on the member 262. The adjusting lever 266 is held in its position by means of one of the recesses 268 arranged on a curved portion 210 of the member 262.

Fig. 9 illustrates the movable contact arm 256 in the operative position, wherein it is in contact with the stationary arm or terminal 248 of the time delay switch for a closing of the electric circuit when the main switch 220 is closed. When the movable contact arm 256 is moved from its inoperative position 256' indicated bydash and dot lines into its operative position by means of a chain 212 attached to the arm, a helical spring 214 wound around the pivot 266 01' the arm is tensioned. The free end of the arm 266 contacts an extension 216 secured to the member 262, when the arm 256 is in its end operative position limited'byan abutment 216 on the member 262. vAs soon as the arm 256 is released, the helica1 spring214 tends to return the arm 256 into its inoperative position 256'. This return movement, however, i delayed by the friction between the arm 256 and the extension 216, which in turn depends on the action of the resilient base 252. The more the end 264 of the base 254 is urged toward the member 262 by means of the adjusting lever 266, the smaller the friction between the arm 256 and the extension 2.3, and the shorter the closing period of the time delay switch. Thus, the time of expo ure may be adjusted by the lever 266.

According to the embodiment shown in Figs. 8 and 9, a reflector 280 is arranged around the lamp receptacle 2 36 carrying the bulb 282.

An exchangeable color filter 286 passing through a slot 288 in the wall of the casing is slidably arranged on a guide 290. The color filter may be inserted into the device or may be taken away therefrom as is required by the reproduction process.

The opening 292 of the casing 204 opposite the

bulbs

280, 282 is covered by a plate 294 of transparent or translucent material, for example by a plate of ground glass, which is'connected with the wall of the casing in any suitable manner.

Although Fig: '7 illustrates the use of the apparatus for the reproduction of a page of a book, it may be used for the reproduction of any kindof an object, for example letters, documents, tracings, blue prints, etc. Furthermore, the size of the plate 202 may be larger than the size of the lower opening of the body or stand 200; in such case the body or stand 200 is placed on top of the plate 202.

The photographic reproduction apparatus shown in the drawings may be used for the production of positive as well as negative prints by the reflex method of photographic printing.

I have described preferred embodiments of my invention, but it is clear that numerous changes and omissions may be made without departing from the spirit of my invention.

What I claim is:

1. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object. comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of lightrays emanating from said illuminating means, and a hollow stand open at two opposite ends, said casing resting on one of the ends of said hollow stand with said opening facing said end of the stand, and the other end of said stand being arranged for positioning onthe piece of sensitized paper so as to press sanieagainst the object. r

2. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object, comprising: a casing illuminatmg means arranged in said casing, one side of said casing having an opening for the projection of lightrays emanating .from said illuminating means, and a hollow stand open at two opposite ends,

.said casing being detachably mounted on one 3. A photographic reproduction apparatus for making photographic prints of an object on a piec of sensitized paper resting on said object,

comprising: a casing, illuminating. means arranged in said casing, one side of said casing having an opening for the projection of lightrays emanating from said illuminating means, and a hollow stand open at two opposite ends, said hollow stand being foldable, said casing being detachably mounted on one of the ends of said hollow stand with said opening facing said end of the stand, and the other end of said stand being arranged for positioning on the piece of sensitized paper so as to press same against the object.

4. A photographic reproduction apparatus for making photographic prints of an object on a. piece of sensitized paper resting on said object, comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of lightrays emanating from said illuminating means, a hollow stand open at two opposite ends, said hollow stand being foldable, said casing being detachably mounted on one of the ends of said hollow stand with said opening facing said end of the stand, and a light-permeable plate arranged at the other end of said stand, and the other end of said stand being arranged for positioning on the piece of sensitized paper so as to press same against the object.

5. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object, comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of light rays emanating from said illuminating means, a hollow stand open at two opposite ends, said casing resting on one of the ends of said hollow stand with said opening facing said end of the stand, the other end of said stand being arranged for positioning on the piece of sensitized paper so as to press same against the object, and a light-permeable plate arranged in the open mouth of said other end of said stand for engagement with said piece of sensitized paper.

6. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object,

I comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of light rays emanating from said illuminating means, a hollow stand open at two opposite ends, and a light-permeable plate arranged for positioning on the piece of sensitized paper so as to press same against the object, said casing resting on one of the ends of said hollow stand with said opening facing said end of the stand, and the other end of said stand resting on said lightpermeable plate.

7. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object, comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of light rays emanating from said illuminating means, and a hollow stand open at two opposite ends, said hollow stand being tapered from its base towards its top, said casing resting on the open top end of said hollow stand with said opening facing said top end of the stand, and the open base of said stand being arranged for positioning on the piece of sensitized paper so as to press same against the object.

8. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object,

'comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of light rays emanating from said illuminating means, and a hollow stand open at two opposite ends, said hollow stand being tapered from its base towards its top, said casing being detachably mounted on the open top end of said hollow stand with said opening facing said top end of the stand, and the open base of said stand bein arranged for positioning on the piece of sensitized paper so as to press same against the object.

9. A photographic reproduction apparatus for making photographic prints of an object on a piece of sensitized paper resting on said object, comprising: a casing, illuminating means arranged in said casing, one side of said casing having an opening for the projection of light rays emanating'from said illuminating means, a color filter slidably arranged in said casing between said illuminating means and said open ing, and a hollow stand open at two opposite ends. said hollow stand being tapered from its base towards its top, said casing beingdetachably mounted on the open top end of said hollow stand with said opening facing said top end of the stand, and the open base of said stand being arranged for positioning on the piece of sensitized paper so as to press same against the object,

10. A photographic reproduction apparatus fo making photographic prints of an object on a piece of sensitized paper resting on said object, comprising: a casing, illuminating means arranged in said casing and suitably connected with a circuit, a battery in said casing, a time delay switch in said casing for connecting said battery with said circuit, one side'of said casing having an openingfor the projection of light ray emanating from said illuminating means, and a hollow stand open at two opposite ends, said hollow stand being tapered from its base towards its top, said casing being detachably mounted on the open top end of said hollow stand with said opening facing said top end of the stand, and the open base of said stand being arranged for positioning on the piece of sensitized paper so as to press same against the object.

JOHN PAULAS.