US1320849A

US1320849A - sheetsxsheet z

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Publication number: US1320849A
Authority: US
Publication date: 1919-11-04
Anticipated expiration: 1936-11-04

Description

F. G. ESCOBAR.

APPARATUS FOR THE PHOTOGRAPHIC REPRODUCTION 0N PAPER BY MEANS OF ELECTRIC LIGHT. APPLICATION FILED SEPT-l8, I9IB.

1,320,849. Patented Nov. 4, 1919.

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F.G.ESCOBAR APPARATUS FOR THE PHOTOGRAPHIC REPRODUCTION 0N PAPER BY MEANS OF ELECTRIC LIGHT.

APPLICAHUN FILED SEPT- I8, 1918. 1,320,849.

Patented Nov. 4, 1919.

4 SHEETSSHEET Z momma F. G. ESCOBAR.

APPARATUS FOR THE PHOTOGRAPHIC REPRODUCTION 0N PAPER BY MEANS OF ELECTRIC LIGHT.

APPLICAHON FILED SEPT-18,1918.

Patented Nov. 4, 1919.

4 SHEETS-SHEEF 3.

F. G. ESCOBAR.

APPLICATION FILED SEPT- 18. |9l8 1,320,849. Patented Nov. 4, 1919.

4 SHEETS-SHEET 4.

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L %\N .m.\\ Ill NS UNITED. srnrrnsrarnnrr OFFICE.

FRANCISCO GALLEGO ESCOBAR, 0F ROSARIO DE SANTA FE, ARGENTINA.

APPARATUS FOR THE lPHOTOGRAPI-IIC REPRODUCTION ONPAPER BY MEANS OF ELECTRIC LIGHT.

Specificatiori of Letters Patent.

Patented Nov. 4., 1919.

Application filed September 18,1918. Serial No. 254,592

To all whom it may concern Be it known that I, FRANCISCO GALLEoo Esconsn, subject of the Kingdom of Spam, residing at N o. 852 Corrientes St, Rosario de Santa Fe, Argentina, have invented certain new and useful Improvements in Apparatus for the Photographic Reproduction on Paper by Means of Electric L1ght, of which the following is a specification.

The present invention refers to an apparatus for photographic reproduction on paper by means of electric llght and has for object an apparatus which permits of a considerable number of copies being takenrapidly and economically.

The invention has also for object an automatic apparatus which permits ofthe exact regulation of the time of exposure and the intensity of the light.

The invention has also in View other objects which will be specified in the course of the present specification and which will-be specially noted in the claims which follow 1t.

In order that'the invention may be clearly understood and easily operated, it has been represented in its preferable form of construction in the drawings attached, in which Figure 1 is a front view of a complete apparatus in accordance with the invention.

Fig. 2 is a vertical cross-section alongthe line AB of Fig. l.

Fig. 3 is a plan view of the same.

Fig. 4 is a vertical cross-section along the line CD of Fig. 3.

"Fig. 5 is a detail, onan increased scale of the cover of the printing-box, in which the closing appliances are illustrated.

Fig. 6, is a similar view, at right angles to the foregoing.

Fig. 7 is a plan view of the cover of the printing-press.

Fig. 8 is a side view of the same.

Fig. 9 is a plan view on an increased scale of the box for the automatic regulation of the light.

Fig. 10 is a vertical section of the same along thel'ine E-F 'of Fig.- 9.

Fig. 11 is a longitudinal section of the said box in which the closing appliances are specially illustrated, and finally,

Fig. 12 is a similar view taken in the opposite direction.

In all the figures mentioned the same 'ref-' erence numbers indicate the same or correspondlng parts. Y

The apparatus in accordance with the present invention is formed by a wooden at will, in order to regulate the intensity of the light of the lamps 19 which are placed inside the said press. The cover 15 is mounted on hinges and it is held closed by a metal fitting at right angles to and solidly aflixed to the lower edge of the cover, as shown at 20, which hooks into the folded end of a spring strip 21 solidly afiixed to the side of the box. The cover closes by its own weight and hooks automatically and in order to open it a pin 22 is provided, which has a head 23, which when in a normal position is flush with the outer surface of the press, and which when pressed inward acts on the spring 21, which recedes from and releases the hook. A spring 24 fixed to the body of the case tends to hold it open when the hook is released. The upper portion of the printing press is closed by\ a cover 25 (Figs. 7 and 8) formed by two sections26 and 27, joined by hinges and provided with springs 29 which tend to hold one of the sections open. Each of the said sections is provided with handles 30 of any appropriate shape to facilitate handling. At each side of the central press is a

box

31 and 32 exactly alike and lntended respectively to hold the paper for printing and the paper already printed; these boxes are provided with covers 33 mounted on hinges, which in their normal condition remain'closed by their own weight and which may be lifted by means of cords 34 which, passing over pulleys 35, mounted on supports 36,, conveniently arranged, are attached to the upper portion of a pedal 37 at the foot of the apparatus.

By pressing the said pedal the two

covers

31 and 32 are simultaneously raised for the purpose which will be explained in due course,and on relaxing the pedal the covers' close again by their own weight. If desired there may be fitted, beneath the two boxes referred to, drawers 38 which can be used for various urposes.

At the 'bac r of the apparatus, and in the center, is fixed a support 39 to which is fitted a lamp 40' purpose w fied;

41- is a socket for the electric connection to the lamps of the apparatus. said socket runs a wire which carries the fuse 42 and continues by 43 to one of the terminals 43 of the adjustable automatic interrupting apparatus. From theq other terminal 44 runs another wire 44 which goes to the lamps 19 and continues along 45 to a plate 46 immersed in an acidulated bath at the bottom of the apparatus, which referab y colored yellow, for the iiich will be in due course speciplate is by preference of an undulating shape in order to give it a greater surface, and which is solidly fixed to the lower end of a lever 48, pivoted at 49,by means of which its position may be regulated with respect to another similar fixed plate 51 adjusted also inside the said bath and joined by a wire 50 with the said socket 41. When the automatic interrupter is closed the circuit is also closed through the'lamps 19 and the bath 47 which permits of regulating the intensity of the light of the s aid lamps 19. 52 is a wire which running from the wire 43, before it enters the interrupting device, goes to a red light 53 which is placed inside the printing press, and which remains constantly alight as will be understood by the arrangement of the circuits as described. 54 are switches fitted on the front of the apparatus, by means of which various combinations can be made in the circuits of the lamps 19.

55 is the box in which are inclosed the parts corresponding to the automatic voluntary regulation of the time allowed for printing, the duration of which naturally depends upon the strength ofthe plate and the sensitiveness of the aper employed and which should be regu ated in each case. 56 is a rail fixed longitudinally t0 the said box, of some conducting substance, and which carries the terminal-43' to which is connected the wire by which the current enters the apparatus. 57 is another rail parallel to the first and double, which by means of the terminal 44 is connected to the outgoing wire of the interruptor. 58 is a third rail, parallel to the former'two and electrically isolated from them. 59 is a carriage capable of sliding along the two rails first mentioned. This carriage has an electric contact 60', electrically connected with the rail 56 and capable of establishing contact with a contactpiece pivoted at 71 and connected electrically with the rail 57 From the f such a maiiner that when the

pieces

69 and 70 are in contact the circuit of the,

lamps 19 is closed. Anjangular lever 72, one of the arms of which goes under the contact-piece 70 serves to cut the contact betweem 70 and 69 when by the sliding mo-, tion-of the carriage along the said rails the said lever strikes against a lever 78 pivoted at 79 and solidly fixed to a screw-piece which is capable of sliding in a slot 81 fitted at the upper part of the box 55 and the position of which may be regulated at will. The lever 72 is articulated by means of a bar 73 to a horizontal lever 74 pivoted at 75 and capable of moving at an angle determined, by the guide 76. The said lever 74 is joined by a spring 77 to a point 011' the carriage 59 in such a manner that when in a normal position it tends to kee closed the contact between 69 and 70. he carriage 59 carries at one of its extremities an insulated piece of metal 82 to which is hooked the end 83 of a cord 84 which, passing over pulleys 85 ends in a counter-weight 8'6, placed in the lower part of the apparatus. The object of this counter-weight 1s to constantly draw the carriage 59 in a certain direction. Solidly 'aflixed to one side of the carriage 59 is a rack 60 which interacts with a pinion 61 fixed on the end of an axle 65, capable of revolving in bearings 63, solidly attached to a box 62. On the said axle is mounted a toothed wheel 64 which couples with another toothedwheel of smaller size 66 mounted upon the same axle as another toothed wheel 67 which in turn couples with another toothed wheel 67, solidly fixed to an axle on which is mounted a fly-wheel 68. This arrangement serves to regulate the traveling speed of the carriage 59 as will be clearly under stood.

87 is a second carriage arranged to slide along the rails 57 and 58 and upon which at 88 is pivoted an angular lever one of the arms of which 89 lies, when in a normal position, in the track of the movement of the lever 74 of the carriage 59 previously referred to, while the other arm 90 is held in this position by the action of a spring 91. 92 is a cord fixed toone end of the said carriage, and which passing over pulleys 93, ends at a pedal 94, placed at the lower part of the apparatus and which serves to communicate to the said carriage a traveling movement toward the right. The other end of the said. carriage carries an insulated piece of metal 95 Joined by means of a hook 96 to the end of a cord 97 which passing over pulleys 98 ends in a counter-weight 99 at the lower part of the apparatus, which tends to draw the carriage toward the left. A stop 100 suitably placed in the track of the arm 90 of the said lever controls the movement of the same and its disengagement from the lever 7-1- of the first mentioned carriage.

In'working the machine, the pedal 94 is pressed, which causes the carriage 87 to travel toward the right drawing with it the carriage 59 by the engagement of the leverarm 89 with the lever 7 1 until the arm 90 of the former lever strikes the stop 100. During this time, by the open position of the lever 71 the circuit'of the lamps 19 is out. As soon as the disengagement has been brought about by the action of the spring 77 the said circuit is closedand the lamps 19 are lighted and so continue during the return movement of the carriage .59 until the moment'when the device 72 strikesthe stop 78, at which moment the circuit is cut and the lamps are extinguished." The return movement of the carriage 59 is madehy the I action of the counter-weight 86. At thesame time the carriage 87 also returns to its original position by the action of its counter-weight 99'. The position of the regulati'ng stop 78 'with respect to the fixed stop 100, regulates therefore, the duration of the exposure. This regulating stop may be moved along the slot 81 by loosening the screw 80 and'tightening it suitably in order to keep it in the desired position.

This box is closed by an elbow-shaped lever 101, pivoted at 102 and directed by a guide-piece 103, and which has solidly fixed to it a hook 104 which by means of a spring 105 is held constantly in contact with a hook on the lid, not shown in the drawings. It is evident that by pressing down the lever 101, which in its normal position is on a level with the said lid, the hook is disengaged and the lid is freed, a spring 106 serving to raise it automatically.

The apparatus is operated as follows: The duration of the exposure is adjusted in the manner specified, according to the strengthof the plate and the sensitiveness of the paper, the intensity of the light being also regulated and the number of lamps considered suitable, lighted by means of the switches. The pedal 77 is then pressed which results in opening the two

boxes

31 and 32, a sheet of paper being extracted from the former and placed in the printing press, upon which is then placed the springcover and the pedal is released, the

side boxes

31 and 32 thereupon closing by the weight-of their lids. The other pedal 91 is then pressed and the carriage 87 runs to the right until. on arriving at the stop 100 it frees the carriage 59 which it had drawn along with it, the latter carriage thereupon running back by the action of its counterweight, regulated by the fly-wheel device specified. During this backward movement the lamps 19 remain alight until the moment when the stop 78 comes into action. The pedal 37 is then pressed again and the boxes 31 and 32 o eh, the operator passing with Y the left ban the printed paper to the latter and passing with the right a; sheet of sensioperation, there is no; need to'regula te autoanatically and exactly the duration of the exposure and for this tpurposethe apparatus which is the object 0 this invention has a special device which permits of disconnecting the carriage 59, the circuits being then established by means of a set of levers which will now be described. Along one of the sides of the box of the interrupter are fixed *wooden guides 107 and 108, between which is a metal strip 109 provided with a rim.- This metal strip carries two diagonal guides.

110 in which is capable of sliding a stop 111 solidly fixed to the wooden guides. A spring 112 tendsto hold the said strip in its extreme position toward the left. A lever 113 is connected by means of a joint at its lower end to the opposite end of the'said strip 109 in such a manner that by moving the said lever to its left position the strip 109 moves to the right against the pull of the spring 112. This'movement to the right results in the movement of the strip 109 outward as a consequence of the arrangement of the diagonal guides 110, thus bringing pressure to bear upon the arm of the lever of the second carriage, against the action of the spring 91, preventing its contact with the lever 74. In this manner, when by the action of "the pedal 94 the carriage 87 runs to the right it does not draw with it the carriage 59 which then remains immovable. The lever 113 has its lower end also jointed with the arm 114 of an angular lever pivoted at 115, the other end of which 116 is arranged to establish contact with the end of the rail 56. When the lever 113 is pressed to the left, this contact is established and com municated to the support 117 of the lever, upon which support is also'jointed another lever 118 capable of establishing contact with a contact piece 119 solidly fixed to the carriage 87 and connected electrically with the rail 57. 121 and 122 are springs which tend to return the levers to theirvnormal ositions. By placing the lever 113 in its eft hand position, when the pedal 94 is pressed the carriage 87 runs freely to the right until its contact piece 119 establishes contact with the lever 118, thus closing the circuit. This circuit remains closed as long as the pressure on the pedal 94 is maintained andwhen the latter is released the carriage runs back by the action of the counter-weight 99, the

lever 118 returning to its nornfal position and breaking the circuit rapidly, by means of the spring 12-1.

During the whole time the machine isin operation the external yellow lamp is kept alight in consequence of its circuit being independent of the internal circuit of the apparatus and the interior red light 53 is also kept alight as it is in a circuit which s independent of the automatic interrupter.

It is evident that in the apparatus of the present invention various modifications of construction and of detail may be introduced without thereby departing from the scope of the present invention, which is clearly determined in the clauses of the claim which are appended to this specification.

Having thus specifically described and determined the nature of the present invention and themanner of its operation, I declare that what'I claim as being of my invention and exclusive rig-ht is 1. An apparatus for printing photographic copies by electric light, comprising in combination a supporting frame, a printing press in the center of the frame, a plurality of lamps withinthe' press, electrical circuits for supplying current to the lamps, switches placed in the circuits, an automatic interrupting and regulating device interposed in the circuits of the lamps, and means for regulating the strength of the current in eluding an acidulated bait-h inserted in the circuits of the lamps, substantially as, de scribed and for the purpose specified.

2. An apparatus as claimed in claim 1 wherein a casing is mounted on the frame, rails arranged in the circuits of the lamps carriages slidable on the rails, contact members on the carriages, stop levers for coacting with the contact members, and means for regulating the position of the stop levers.

3. An apparatus as claimed in claim 1, wherein means are provided for throwing out of action the automatic circuit regulator and for simultaneously bringing into ac tion the interrupter.

. 4. An apparatus for printing photographic copies by electric light, comprising in combination a supporting frame, a printing press mounted in the center of the frame, a plurality of lamps in the press, electrical circuits for supplying current to the lamps, switches interposed in the circuits, a slidably mounted regulator in circuit with the lamps, a slidably mounted interrupter, cooperative levers on the regulator and the interrupter, means for actuating the interrupter to cause movement thereof in one direction and to cause .coaotion between the levers on the regulator andthe interrupter to insure of the interrupter subsequent to release, cooperative contact members on the regulator, another lever for coactin with the contact members for cutting out the contact between the contact members and an adjustably mounted stop member for coacting with the last mentioned lever on the regulator.

5. An apparatus as claimed in claim 4, wherein a slida'bly mounted contactstrip is provided and normally positioned to allow operation of the lever on theinterrupter, manually operative means associated with the contact strip to cause the strip tolcoaot with the lever on the interrupter to prevent coaction of the said lever with the corresponding cooperative lever on the regulator, and secondary circuit closing means engageable by the interrupter when the operation of the latter is controlled by the last mentioned manually operabl means.

6. An apparatus as claimed in claim 4,

wherein means are provided for throwing out of action the automatic circuit regulator and for simultaneously bringing into action the interrupter.

7. An apparatus as claimed in claim 1, wherein the interrupting and regulating device comprises a casing on the frame, rails interposed in the lamp circuits, regulating and interrupting carriages on the rail, contact members on the regulating carriage arranged in circuit with the rails, one of the contact members being in the form of a lever, cooperative levers on the carriages for coacting with the lever, contact members, a stop lever on the casing for cooperating with the lever contact member, means for adjusting the position of the stop lever, a pedal operatively connected with the interrupting carriage for causing movement of the carriages in one direction. a stationary stop abutted by'the lever on the interrupter for causing dislodgment of the cooperative levers to release the regulator carriage weight, actua-ble cables connected to the carriages and speed controlling means associated with the regulating carriages.

In testimony whereof Iafiix my signature.

FRANCISCO GALLEGO ESO OBAR.