US1537868A - Apparatus for taking the color-component negatives for multicolor photography - Google Patents

Description

May 12, 1925. 1,537,868 J. MRQZ APPARATUS FOR TAKING THE COLOR COMPONENT NEGATIVES FOR MULTICOLOR PHOTOGRAPHY Filed Feb. 25, 1922 Patented May 12, 1925. i i i UNITED STATES PATENT OFFICE.

J'OSEF MRZ, OF VIENNA, AUSTRIA.

APPARATUS FOR TAKING THE COLOR-COMPONEN T NEGATIVES FOR MULTICOLOR PHOTOGRAPHY.

Application filed February 25, 1922. Serial No. 539,163.

To all whom it may concem: In the annexed drawing a mode of execu- Be it known that I, Josnr Mnoz, mechanition of the apparatus according to my incal engineer, a citizen of the Republic of vention is represented, Fig. 1, being a Poland, residingatVienna,in Lower Austria front elevation and Fig. 2 a side elevation.

and Republic of Austria, have invented cer- The axis 1 of the driving drum 2 of the 80 v tain new and useful Improvements in an film carries the known Maltese cross 3 in Apparatus for Taking the Color-Component which engages the pin 4 of the disc 5 mount Negatives for Multicolor Photography, of ed on the driving shaft 6. This shaft 6 carwhich the following is a specification. ries a loosely mounted toothed wheel 7 en- '10 The eriodically successive taking of Mg gaging with a toothed sector 8 mounted on 66 atives fibr multi-color cinemato ra hie films an axis 9; a spring 10 connected to the secis known. 'With this metho t e colortor 8 tends to rotate it upwards. Theupscreens or light-filters corresponding to the ward rotation of the toothed sectoris limcolor-component negatives are automatically ited by a pin 11 engaging in a concentrically and periodically brought to the place of exarranged slot 12 in the toothed sector. The 70 posure in accordance with the rate of the end of the spring 10 is connected to a disc intermittent movement or advance of the 13 by the rotation of which the initial tenfihn. The film aswell as the color-screens sion of the spring may be varied and adare generally driven by means of a crank justed. The toothed sector 8 may be rotated operated by h d. downwards by means of a button 14 fixed 75 According to my invention I intend to to the axis 9 of the sector, which button is use t is known principle for ordinary multioutside the casing of the, apparatus and color photography, i. e. not for cinematogthereby the tension of the spring 10 is inraphy. However it is not possible to use creased. A downward rotation of the the known driving device for the film withsector 9 is limited by the snapping of the 80 out essential chan es in this device, because pin 15 mounted on a flat spring 16 into a with ordinary p otography, only three recess 17 of the toothed sector 8, thereby component photographs have to be taken in fixing it against the action of the spring 10. case of three-color photography, and there- The flat spring 16 is provided with a pin 18 by it is im ossible to regulate the rotation rojecting to the outside of the casing and 86 of the ban -crank in such a manner as to having there a knob 19. By pressing this stop the film exactly after three sections of knob 19 inwardly the flat spring 16 is moved movement if" with instantaneous exposures so as to withdraw the pin 15 from the recess a rapid .rotationis required. 17 of the toothed sector 8, so that this sec- A di t my i ti th d i i tor is released and is rotated upwards by no mechanism is operated by'a mechanism ach p thereby i g y 151921118 of tuated by weight or by spring and liable the tOOthed Wheel 7 the i 0 n P t to be freed for operation, the tension of the Maltese 011055 and h It h drlvmg mechanism produced by the weight or the m thls belng rotated lntel'mlttently 0 spring being variable in order to vary the consequence of the Maltese cross Mecha on speed of running of the film and consequently the duration of exposure of the in- The degree of rotation of the toothed secstantaneous photograph, and the running tor8 is limited by the engagement of the movement of the driving mechanism, being pin 11 in the slot 12 in such a manner that limited by stops. Therefore it is sufficient the film is only moved for the required three to free the clickof the drivin mechanism colorcomponent sections in case of a threekept under tension, in order toTi P ave it autocolor photograph. The toothed Wheel l matically run to such a degree so that only loosely mounted on the shaft 6 1s connected exactly the desired number of component with one part 20'of a coupling device, the viewsmay be produced on the film. For second part 21 Of WhICh IS fixed on the time-exposures the driving mechanism may shaft 6. The coupling dev1ce 1s constructed be combined with a hand crank for actuatin such a manner that coupl ng ls'efli'ected 'ing. However such time-photographs may only in onedirection of rotat on whereas .also be automatically taken by means of the in the other direction no coupling effect 15 driving mechanism under tension. produced. The first part 20 of the couon a bolt engages the pling device is provided with a grooved disc 22; part 20, toothed wheel 7 and grooved disc 22 are united to form a single piece which is pressed against the second part 21 of the coupling by means of a spiral spring 23. An oblique member 2a mounted grooved disc 22; this bolt may be rotated by means of the button 25 in such a manner that this member 24 thereby withdraws the coupling part 20 from the coupling part 21 against the action of the spring 23. The teeth of the coupling are so directed that when the coupling is engaged, the movement of the toothed sector 8 in one direction is transmitted to, the shaft 6 whereas with the back rotation of the toothed sector 8 by means of the button 14, the shaft 6 is not moved.

Outside the casing the shaft carries a hand-crank 26 adapted to directly drive the shaft 6 if time-exposures have to be made.

In order to avoid that the toothed sector makes the rotation, which in the case of actuating the driving by means of a handcrank is superfluous, the coupling device 20, 21 may be disengaged by a short rotation of the button 25 so that the toothed wheel 7 is not obliged to rotate with the axis 6, when this latter is driven by the crank 26. In order to prevent an opposite rotation of the crank the shaft 6 carries a ratchet-wheel 27, in the teeth of which a pawl engages.

The shaft 6 is further provided with a bevel gear 28, which by means of the bevel gear 29 drivesthe shaft 30, which by means of a worm gear 31, 32 rotates the disc 33 having three diaphragm openings 33"; simultaneously they contain also the color screens. These three (red, green, blue) screens advance to the lace of exposure according to the intermittent progression or advance of the film.

The combination of thesingle featuresas described constitute a simple, photographic apparatus for hotochromatic or multicolor photograp y, for the actuating of which for instantaneous photographs, it is sufficient to predetermine the duration of the instantaneous exposure by means of the button displacing the disc 13 and varying thereby the initial tension of the spring 10,-to rotate the knob 14 for effecting a tension of the automatic driving mechanism-and to press the knob 19 inwardly for disengaging the click-of the driving mechanism, whereupon the driving mechanism automatically runs down and in consequence of its limitation imparts to the film only three successive movements in advance. Simultaneously the three color-screens are automatically and in succession brought before the'place of exposure. In case of timeexposures having to be made by means of the crank, the coupling device 20, 21 is first disengaged by rotating the button 25.

In accordance with the patent statutes, I have shown and described ,*the preferred form of this invention: but I desire it to be distinctly understood that I fully realize that changes may be made in the structure herein disclosed and that I intend to include within the scope of the claims that follow hereinafter all'modifications of the preferred form of this invention that do not depart substantially from the spirit thereof.

\Vhat I claim is:

l-. In an apparatus for taking the colorcomponcnt negatives for multi-color photography the combination of a mechanism for intern'iittently moving a film on the back of an objective, a toothed sector engaging with a toothed wheel driving the said mechanism, a spring connected to the said toothed sector, tending to rotate it in such a direction so as to drive the film forwards, a click engaging with a stop of the toothed sector in its position under tension, means for disengaging this cli'k, a device for stopping the toothed sector after its'automatic movement which has caused the film. driving mechanism to bring the required number of film sections in coincidence with the objective, a movable carrier of light-filters and a mechanism for automatically bringing these filters successively in coincidence with the objective in the same measure of time as the film sections come in coincidence with the objective.

2. In an apparatus for taking the colorcomponent negatives for multi-color photography the combination of a mechanism for intermittently moving a film on the back of an objective, a toothed sector engaging with a toothed'wheel driving the said mechanism, a spring connected to the said toothed sector, tending to rotate it in such a direction so as to drive the film forwards, a click engaging with a stop ofthe toothed sector in its position under tension, means for disengaging this click, a device for stopping ,the toothed sector after its automatic movement which has caused the film driving mechanism to bring the required number of film sections in coincidence with the objective, a carrier of light-filters, and a mechanism for moving it in such a manner that the light-filters come successively in coincidence with the objective in the same measure of time as the film sections come in coincidence with the objective, the moving mechanism for these filters being driven by the mechanism driven by the toothed sector.

3. In an apparatus for taking the colorcomponent negatives for multi-color photography the combination of a mechanism for intermittently moving a film on the back of an objective, a toothedsector engaging with raphy the combination of an the said mechanism,

a toothed wheel driving d hed e sai toot sector,

a spring connected to t tendin to rotate it in such a direction so as to d iive the film forward, a click engaging with a stop of the toothed sector in its position under tension, means for disengagmg this click, a device for stopping the toothed sector after its automatic movement which has caused the film driving mechanism to bring the required number of film sections in coincidence with the objective, a rotatable disc carrying-a number of lightfilters and a mechanism for driving the Said disc in such a manner that the light-filters come successively in coincidence with the objective in the same measure of time as the film sections come in coincidence with the objective, the driving mechanism of the said disc being driven by the mechanism driven by the toothed sector.

4. In an apparatus for taking the colorcomponent negatives for multi-color photogdriven mechanism for intermittently moving automatically a film on the back-of an objective, with a device under tension for driving this mechanism, a device for automatically stopping the-film after the exposure of the required number of color-component sections of'the film, a movable carrier of light-filters, a mechanism for automatically bringing these filters successively in coincidence wlth the objective in the same measure of time as the film sections come in coincidence with the objective, the device for actuating the film driving mechanism for the film being provided witha coupling device for enabling a. disengagement of the connection between this actuating device and the film driving mechanism, this mechanism being adapted to be driven by hand for exposures of longer duration. 1

In testimony whereof I a'fiix my signature.

J OSEF MROZ.

Witnesses CARL SONDENBERG, Jommw L012.

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