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March 15, 1938. E_ Roux 2,111,516 CINETHEODOLITE Filed May 29, 1936 5 Sheets-Sheet l .7nvenf0r: “M75; Erwin Roux Alia/‘nay 15, 1938. E_ Roux 2,111,516 CINETHEODOLITE Filed May 29, 1936 '5 Sheets-Sheet 2 “ma2 /24 111d w 2.9 I ,1 I noooooooooooooonj?yj 0 o 0 00,0 0 U0 0 0 .7nven/or: Erwin Roux "Y M - ?/‘forney March 15, 1938. 2,111,516 E. ROUX C INETHEODOLITE Filed May 29, 1936 5 Sheets-Sheet 3 ' 11219.4 0. 106' .7nvenf0n- Erm% W. March 15, 1938. 2,111,516 E. ROUX CINETHEODOLITE Filed May 29, 1936 5 Sheets-Sheet 4 A Q%“sg 11H Ilium/on- Erw/h Roux March 15, 1938. 1 E_ Roux 2,111,516 CINETHEODOLITE Filed May 29, 1936 5 Sheets-Sheet 5 50 .56’ 57 A5 51 55 / 5/52 M r I a? _ 54 TUI”LQ A10 A720 by A 4’ * 2,111,5l6 Patented Mar. 15, 1938 UNITED STATES PATENT OFFICE 2,111,516 omarnnonoura Erwin Roux, Berlin-Zehlendorf-Kl. Machnow, \ Germany Applicatiltgi May 29, 1936, Serial No. 82,525 Germany May 29, 1935 13 Clainis. ‘(or 33-11) ' My invention relates to the problem of deter mining by photogramrnetric and graphic methods _ pair the correctness of the data obtained from the respective coordinated photograms. The principal object of this invention is to over the airworthiness, speed, acceleration, sensitivity, come many di?iculties offered by the problem rigidity, responsiveness to ‘,distant control and underthe consideration and to provide an improved 5 5 other aerodynamic and static propertiesof air recording equipment of the type craft, such as aeroplanes, gliders, Zeppelin air , photogrammetric set forth which ensures strict synchronism of the Vships, and kindred structures and of other objects exposures made in the cooperating cinetheodolite rapidly moving in the air, including parachutes, air torpedoes and the like, collectively hereinafter cameras. vAnother object of the invention is to so re- 10 10 called aircraft. With this object in view it has design the cinetheodolite cameras of the equip been proposed to take series of moving pictures of ment, to permit of a simultaneous change of the the aircraft to be tested synchronically from two frequency of ‘the exposures made, say from 5 to 10 fixed stations on the ground by means of cine cameras, structurallycombined with theodolites l5 and known as cinetheodolites; .on the sensitized ."riilm's of which in addition to the motion pictures of the aircrait'proper under test and aimed at or 20 exposures per second, so as to be in accord and to cope with variations of the speed of the 15 aeroplane under test. - A noteworthy feature connected with the change of the exposure frequency, accomplished .by the camera men, sections of the vernier scales _ according to this invention, consists therein, that of the theodolites showing the respective sighting the said changes are executed almost instantane- 20 _ 20‘ angles, altitude and azimuth,-designated- a and h, 02 and‘hz, a3 and M, at and hi (readings) on Fig.‘ 1 of the accompanying drawings, are're corded on one and the same sections of the sensi tized films asseen in Fig. 3. 25 Synchronism of exposures‘ A condition of paramount importance which is ' connected with the proper‘ taking of photogram metric records of the kind described, and on which ously without any noticeable interruption of the recording operations. “ - Another object of the invention is to provide means for making (‘single exposures synchroni-v cally in the‘ cinetheodolite cameras of the equip- 25 ment instead of taking series of photograma-g ,' Further objects will be made evident herein after. _ a ' ' . T The nature and scope of the invention are brie?y outlined in the appended claims and will so be more fully understood from the following speci-' 30 thecorrectness and accuracy of the ?gures, fac tors and relations deduced largely depends, con ?cation taken together with the accompanying sists therein, that in both cinetheodolites, desig drawings, in which: ‘ ‘ I nated T and T2, which are cooperatively asso-' Fig. 1 is a lay-out perspectively showing the , ciated with a central controlling station indicated whole scheme, namely the dispositi’i‘in of two 35 35 at S so as to present a unitary recording system, I 'cinetheodolite cameras at work and their co I the exposures be made in strictest synchronism; otherwise'the photograms, intended to be co ordinated in pairs so as to be truly comple mentary to each other at the subsequent trigo 40 nometric analysis and other measuring opera tions, will notv sharply correspond to each other and will not show the aircraft tested exactly in one andthe same position. “ > 7 Practical tests, to which cinetheodolite record- ' 4'5 ing equipment, manufactured by the inventor’s employers and described for instance in their , British Patent 351,243 was subjected, have re v’ vealed,’ that the cinetheodolite cameras worked operative association with the central ‘controlling station. It should be noted that, since it isdesir able to be independent of the position. of the sun. when making the records,~the equipment should '40 include three cinetheodolite‘cameras in all, which are to be located at the comers of a preferably rectangled triangle, of which the sides are from' , one to three kilometers in length. I - Fig. 2 is a cross section through one of the 45 cinetheodolite cameras designed according to this invention which shows diagrammatically and by way of an example the arrangement and coop erative association of its principal parts. unsatisfactorily as to the exact synchronism of Fig. 3 shows on an enlarged scale a section of 60 50 the exposures: It has been found that owing to - one of the ?lms, which was exposed'in one of the tremendous speed of modern army aeroplanes, the clnetheodolite cameras, designed according ‘ exceeding 690 kilometers per hour, differences as to this invention and is ready for use in the sub small as one hundredth of. a second in the times sequent measuring operationsk ~ ' at which the exposures at the cooperating cine ‘Fig, i is a cross section showing the shutter I5 55 theodoiite cameras are made, will seriously im, 2,111,510 and ?lm feeding mechanism of the cinetheodolite cameras on a larger scale. - Fig. 5 is a side'elevation showing details of the film feed gear. - Fig. 6 is a fragmentary .side elevation showing the cooperation of the diaphragms of the primary shutter of the cinetheodolite cameras. Fig. 7 is a side elevation of the auxiliary shut-_ ter and its operating elements, partly in section. 10 Fig. 8 is a lay-out showing an electromagnetic mechanism for controlling the operation of the auxiliary shutter. ' _ Fig. 9 is another lay-out diagrammatically showing the different alternators and the switch ing mechanism for operation ofthe cinetheodolite cameras. . Fig. 10 perspectively shows the key board of the switchingv mechanism and a box wherein the latter is enclosed. 20 Fig. 11 is a lay-out showing diagrammatically the power plant re-designed for the purposes of this invention. ' The photogrammetric recording equipment, im proved according to this invention, essentially 25 consists of cinetheodolite cameras T, T2 adapted mechanism, the ?lm feeding mechanism of the cinetheodolite cameras and their actuating means have been re-designed, as described here inafter: . The shutter mechanism essentially consists of a primary shutter for timing the exposures to be made, comprising two rotary diaphragms ll, 35‘coaxially keyed to a shaft SI and a sleeve 2! respectively and being rotated by gears 22 and 31 at different rates of speed; the respective rates of ' speed are so proportioned as to represent whole, integer, numbers, for instance 1:3, 1:4; and a secondary shutter cooperatively associated with the former for making the actual exposures. The secondary shutter comprises a rotary dia 15 phragm 40‘ attached to a bevel gear 42,, meshing with a second gear “I, an auxiliary shutter of any convenient design preferably of the iris diaphragm type, widely known ‘in the optical art and diagrammatically indicated at 45, and dis 20 tant control means fonopening and closing said auxiliary shutter 45 in both cameras at the op- ' erator’s discretion, which are described in detail hereinafter. . According to this invention, viz. in order to ensure strict synchronism of the exposures, made axes by attendants, whose duty it is to observe in speedy succession by the said diaphragms, two the aeroplane under test in the air through tele electric synchronous vmotors Md and M! are pro . scopes,.diagrammatically indicated in Fig. l at ‘i vided in each camera, to which alternating cur 30 and 11 and cooperatively associated with the cam rent is supplied from the power plant P, and of eras, so as to keep the optical main axis of the which the primary motor Md operates the pri 30 cameras directed to the aeroplane to be photo mary shutter, while the secondary motor Ml graphed. 4' operates separately diaphragm 4,0 of the sec 'A power plantP is provided for generating al ondary shutter and the ?lm feeding mechanism. ternating currents of speci?c frequencies required The latter is diagrammatically indicated by a for operating the cameras T, T2. _ to be swung around their vertical and horizontal A switch box Sin charge of another attendant is provided for controlling the supply of electri cal energy to the cameras T-T2 in order to con ~10 trol the exposures to be made. .A system of multiple cables 0, ea, c; and c4 interconnect the cameras, power plant, switch box, and a source of direct current, preferably a slot wheel and pin gear 46, 41 operating shaft II and accessorial elements coupled therewith known in the art‘and not shown. The Inventor's experiments have shown, that exact synchronism of the exposures is not 40 achieved, if only one single electric motor is pro vided in each camera for jointly operating both the shutter and the ?lm feeding mechanism. The lack of synchronism experienced in this case Referring ‘to ‘Fig. 2 of the drawings, each of is due to the intermittent, non-uniform character the cinetheodolite cameras of the equipment of the ?lm feed and probably also to accidental comprises a camera casing 20 having‘an expo changes in the frictional resistance offered by the sure aperture 2| and being pivoted by means of _ storage battery 13. hollow trunnions 22, 22' in the casing 24 of the ' theodolite proper. The latter is rotatably mount ed on a stand 25 and encloses the vernier scales 28: 21 of transparent material. By means of op tical systems diagrammatically indicated by are rows 28, 29, prisms, lenses, and electric lamps, ?lm feeding elements in each camera, which un favorably react upon its driving motor and in turn upon the shutter mechanism. Chaiige of frequency of the exposures It has further been found; that, when using only one electric motor in each of the cinetheodo lite cameras of the recording system it is prac- ' through the trunnions 22,:22' into the camera ' tically impossible to change at will the frequency Cl cl the readings of the vernier scales are thrown casing 20 and are, re-directed therein into the optical ?eld of the exposure lens 23 indicated at 60. 0 and 0', so as to reach the sensitized ?lm F. No claim is made to the optical systems known in connection with cinetheodolite cameras. Trigonometric, graphic, arithmetic and other computing methods, not described hereinafter, are known- in aeronautics and kindred arts, by which from two series of photographic records, of the type seen in Fig. 3, namely from the dif ferences in the readings on the vernier scales-_ altitude and azimuth angles-synchronimlly pho tographed on the ?lms concerned‘in two cin athe odolite cameras, widely spaced from each other, the speed, acceleration, sensitivity, rigidity, re sponsiveness to distant control and other aero dynamic and static properties of aircraft can be . 75 . determined. ‘. , With the objects outlined above the shutter of the exposures without destroying the synchro nism of the shutter operation or interrupting the exposures altogether; moreover, speeding up or retarding the ?lm feed in both cameras in serv ice, so as to take a larger or smaller number of pictures per second would require rather com plicated speed change gears and electrical con trolling devices diiiicult to supervise and operate. With the object of enabling the superintending operator of the cinetheodolite measuring station to temporarily change the number of exposures made per second, in compliance with changes of speed of the aeroplane under observation, as for instance in stunt ?ying, zooming, diving, looping, 70 sliding, spinning, the following apparatus and ?xtures for producing and I timely distributing electric energy are. assembled in the power plant P and in the switch box S of the eq'iipment,iand are connected‘ by cables C and C4 with a source 2,111,516 of direct current B and the motors Md and M)‘ of the cinetheodolite cameras T, T2: .(1) A set of three alternators A5, Al0, A20 for selectively supplying alternating current of dif 5 ferent frequency, for instance, 5, 10, 20 cycles, respectively, to-the ?lm feed motors Mf, M12 of the cameras, . 3 and negative terminals, and the motors Md and M)‘ by a system of wires and multiple cables C-Cl so as to cooperate in the following man ner: ~ As long as none of the master keys K5, KIO, 5 K20, is depressed none'of the frequency selector relays R5, RIO, R20, is excited, neither is the sec (2)‘ An electric motor M, by which said alter-~ ondary relay RII excited, the ?lm feed motors M)‘ of the cameras T, T2 being then connected‘ 10 the recording operations through power trans~ with the phase control direct current circuit Pa, 10 with the result, that'their armatures are elec mitting gears 5I, 52, 53, 54 of different ratio en ‘ closed in a gear box 50; the respective ratios of trically blocked in their zero position. In the meantime the motors Md operating the gearing representing whole, unbroken, numbers primary shutters 30, 35 of the cameras T, T2 are , and being proportionate to the respective fre , nators arepermanently and jointly driven during 15 quencies of the alternators, \. , (3) Another alternator A for feeding the pri mary or shutter motors Md of the cameras, which 'may be driven to advantage by the same motor M and gearings seen in Fig. l1,_operating the 20 said set of alternators, and (,4) Switching means operable byJihe operator and described hereinafter in detail for selectively connecting any‘of the alternators A5, A"), A20 with the secondary or film feed motors M)‘, Mf2. 25 Phase control running, being fed by the alternator A, but, no 15 exposures aremade because the path of the light rays passing therethrough is blocked by the sec ondary diaphraghrn shutter “and the auxiliary shutter 45. ‘ - a On depressing master key K5 and thereby 0105- ‘20 mg switches 50 and GI both ‘the frequency se lector relay R5 and the primary relay RI are ready to be excited; the relay circuit RI however is not closed until contact is made ‘at 55’ by the rotary cam 56, that is, not untilalterhator A5 is’25'“ in its zerorposition. After contact is made at 56’ both the primary and secondary relays RI and R11 which are con nectedin series are excited with the result, that :11.) film feed motors Mf-‘are switched to operate on - the circuit of the frequency selector relay R5 is 30 a\. different frequency. The phase - controlling closed at 59 and line relay H5, actuated thereby, ” Phase controlling means,_ope'rating on direct‘ .current are provided according to this invention which automatically come into action, when the means simultaneously restore the armatures of the'?lm feed motors M! of the cameras T, T2 to their respective‘zero-positions so as to ensure co is thrown into its operative position. On depressing the master key K5 and thus caus ing the ?lm feed-motors ,Mf of the equipment to ‘35, incidence of phase in‘ both motors and, in turn," . run on alternating current of 5 ,cycles frequency 35 and with coincidence‘of/phase the films are fed at. ‘true synchronism of the ?lm feed. ' Said phase controlling ‘means are cooperatively the rate of 5-’ feedings per second and also the associated with the frequency selection switches diaphragm 40 of the cameras '1', T2 is rotated. concerned under the operator's control and are 40 adapted to automatically shunt back the arma - .tures of the ?lm feed ‘motors Mf during a short The cameras T, T2 are nowready for making ex posures as soon as the auxiliary shutter 45, .de- 40 scribed in detail hereinafter, is opened forlonger interval to a direct current circuit called phase ' or shorter periods. 0n depressing the release key KR the master control circuit‘and indicated at P'cin Fig. 9..“ , ’ _ Said phasecontrolling‘means include a pair of key K5 and its switch 5i are thrown-out of oper 4.3 rotary cams 56, 51 keyed to the shaft 55 of alter ation. Independently thereof the"p_rimary and,45 nator A5 (Figs. 9 and 11), which runs‘ at- the low- , secondary relays RI and R11 ‘are not disconnected ' est sp'eed‘of the set. The projecting crest por tions of said cams'are both so directed, as to coin-_ ‘cide or register with the zero-position of the ar 50 mature of alterhator A5, and are cooperatively until'their circuit is interrupted at 51', at the moment, when shafte55 of alternator A5 passes through its zero‘ position.‘ ' By depressing another of the master keys KII 50v associated with a: pair of impulse sending switches, or K20 the same cycle of ' operations described 55' and 51'. The switches are connected through, a system of wires with a'primary relay RI operg above with reference to key K5 is repeated analo- ' gously. ‘ -_ . _ ating ‘a primary contact'member 50; a secondary ' theThe irisauxiliary diaphragm shutter type,45,is which ‘operated is preferably by an elec-. of 55 .75 relay RII, connected in series with (the primary ‘relay RI and operating a secondary contact mem ber 50, a shunting switch U, and a frequency mas ter switch H; a direct current main-switch 60,v I. actuated at 65, by a spring loadedlslide ‘bar 66; 60 and frequency selecting switches BI, 52, 63 op erable by master keys K5, KIO, K20, which en gagersaid slide'bartli through-incline cam and - pin gears 5a, 50.58, The master keys are pro vided with collars 8)‘ cooperating with catches 6d 65 hinged to a spring loaded‘ bar Si in such manner, that on depressing. any one of, the master keys so as to close the circuit/‘anti .or 52 or_ 53, it is retained by its catch id in operative position, im tromagnetically controlled mechanism, which in the embodimentof the invention shown in ‘the drawings by way of an‘ example includes a bell crank lever'10 (Figs. 4 and '7) associated by a‘ pin projecting therefronr with Van ,excentric 00 notched disk ‘I2. The disk is journalled on the shaft 3lfdrive'n by the shutter motor Md, and is connected to the pin shaped projecting end of a spring band coupling ‘I3, which frictionally en gages shaft 3|, so as to rotate therewith. 05 A-vpair of cams ‘I4 and-“I6 is mounted on the shaft 3|, the cam 14 being connectedto spring band coupling ‘I3 engaging the \shaft 3| and the til being- released by a release key KR, which excentric ‘I2, while cam 15 is keyed to shaft 3|, . A three-armed lever is fulcrumed at 00, the 70 7 70 through lever 0g throws the [catches 5d out of engagement“ Frequency selector relays R5, R10, 7 v, staggered upper ‘ends or pawls 84, 567 of which are adapted to cooperate with- the cams ‘I4, ‘I5 R20'operate line relays H5, Hi0, H20. " " v The abovei’described,alternators, switches and - relays are interconnected with the said source of 75 direct current, indicated in Fig;~ 9 by its positive respectively in such manner, that pawl 8| can be thrown out of engagement with cam ‘IQ only when pawl 86 enters into the recessed portion 75 4. 2,111,010 of cam 15. The lower end 02 of the three armed lever is loaded by a spring 03 and forms the ar mature or an electromagnet 55. ~ each camera including a ?lm feeding mechanism and a ?lm exposing mechanism, a synchronous motor for said feeding mechanism, and a syn A hooked catch member 54 is .fulcrumed at 00, which is adapted to arrest cam 14 on having made a half turn as indicated in Fig. 8 in dotted lines, chronous motor for said exposing mechanism; and to which a push bar 00 slotted at 09 is‘ hinged of said cameras; and means connected to supply engaging pawl 00. The lower end 02 of catch "is associated with an electromaznet 95. A further electromagnet I05 is provided having 10 an armature I05’ with a bolt I02~attached there to, the latter‘ being slidably ?tted within the electromagnet I05 and adapted to cooperate with the resilient contact member of a two-way switch I05 and further with the lower section 02 of le ver 00. > Exposure keys SE and SI operate switches 50' and 50,‘ which are connected with the electro magnets 55, 05, I05, the two-way switch I06 and means connected to supply alternating current of a predetermined frequency to all feeding motors alternating current of an integer multiple of said predetermined frequency to all exposing motors of said cameras. l0 2. In a photogrammetric recording system a plurality of recording.m0ving picture cameras. each camera including a ?lm feeding mechanism _ and a ?lm exposing mechanism, a. synchronous motor for said feeding mechanism, and a syn 15 chronous motor for said exposing mechanism; a ?rst generator connected to supply alternating current to all feeding motors of said cameras; a second generator connected to supply alter nating current to all exposing motors; a common 20 of wires. _ prime mover; and motion transmission means The operation of the electromagnetic device for between said generators and said prime mover, actuating the auxiliary shutter 05 is as follows: the ratio of transmission being such as to move On depressing exposure key SE and closing the ‘ said second generator to produce an alternating direct current circuit at 50", the electromagnet 55 current of a frequency which is an integer is excited, catch member 94 is thereby swung into multiple of the frequency of said ?rst generator. ,25 its operative position, shown in dotted linesin v,3. In a photogrammetric recording system a Fig. 8, while pawl 04 is thrown out of engagement , plurality of recording moving picture cameras, with cam 14, by push bar 00. Thus cam ‘H on each camera including a ?lm feeding mechanism having made only a half turn is arrested and inci and a ?lm exposing mechanism, a synchronous 30 dentally the 'excentric ‘l2 and the lever 10 are motor for said feeding mechanism, and a syn stopped; the auxiliary iris shutter 45, which was chronous motor for said exposing mechanism; a opened during said half turn of cam 14 will there ?rst source connected to supply alternating cur by be kept in opened condition and series of pic rent of a predetermined frequency to all expos tures are then taken ‘in speedy succession con ing motors of said cameras; a plurality of sec sistent with the respective speed of the ?lm feed ond sources of alternating current of integer the source of direct current B through a system motors MI running on alternating current of 5, 10 or 20 cycles. On depressing exposure key SI and closing the 40 direct .current circuit at 50 electromagnet 85 is excited and pawl 04 is thrown out of engagement with cam 14. By the succeeding cooperation of lever 02, bolt I02, electromagnet I05 and the two way switch’ I05, electromagnet 05 is disconnected and the three armed lever 00 is returned by spring 03 into its operative position, in which cam ‘I4 is arrested having made a full 360° turn. In this manner single exposures can be madein suitable intervals at the operator’s option. Various changes and modi?cations may be con veniently made in the structural details of the mechanism and expedients assembled for coop 'eration in the improved theodolite recording equipment described, without substantially de parting from the spirit and the salient ideas of this invention. ‘ For instance the motor M driving jointly the alternators A, A5,.Aw and A20 may be cooper atively associated to advantage with one of those automatic, highly sensitive speed controlling at tachments known in the electrical ?eld as tuning fork regulators, symbolically indicated at Tu in Fig. 11. multiples of the predetermined frequency of said ?rst source; and means for interchangeably con necting the feeding motors of all of ‘said cameras to one of said second sources. 40 4. In a photogrammetric recording system a plurality of recording moving picture cameras, each camera including a ?lm feeding mechanism and a ?lm exposing mechanism, a synchronous motor for said feeding mechanism, and a syne chronous motor for said exposing mechanism; a first generator connected to supply alternating current to'all exposing motors of said cameras: a plurality of second generators; a common prime mover; motion .transmission means between said » prime mover and said ?rst and second gener ators the ratio of transmission being such as to move said second generators to produce alternat ing currents of a frequency which is an integer , multiple of the frequency of said ?rst generator; 55 and means for interchangeably connecting the feeding motors of all of said cameras to one of said second generators. 5. In a photogrammetric recording system‘a plurality of recording moving picture cameras, each camera including a ?lm feeding mechanism and a ?lm exposing mechanism; a synchronous motor for said feeding mechanism, and a syn Slide bar 55 may be elongatedto advantage ' chronous motor for said exposing mechanism: 'a first source connected to supply alternating cur so as to engage and operate switch 50', inde rent of a predetermined frequency to all expos pendently of exposure key SE. In this case se_-‘ ing motors; a second source of alternating cur ries of pictures are taken whenever one of the rent; a‘source of direct current; and means for switches 6t, 52, 53 operated by the master keys alternatively connecting said feeding motors to ' K5, KIO, K20, is in action and the ?lm feed mo said source of direct current, whereby all motors 70 tors M! of the cameras are connectedwith one are moved into phase, and to said second source of the alternators A5, AIO, ‘A20. ‘ ' of alternating current, whereby said inotors are and provided with an extension indicated at 55’, What I claim is: moved synchronously, maintaining their correctv 1. In a photogrammetric recording ‘system a phase relation. plurality of recording moving picture cameras, , 6. In a photogrammetric recording system a 75 I 7 5 2,111,516 plurality of recording moving picture cameras; ing connected to supply said primary relay with each camera including a ?lm feeding mechanism and a ?lm exposing mechanism; a synchronous energizing current over one of its said make contacts. motor for said feeding mechanism, and a syn- I chronous motor for said exposing mechanism; a ?rst source connected to supply alternating cur rent of a predetermined frequency to all expos ing motors; a plurality of second sources of alter nating current of integer multiples of said pre 1.0 15 determined frequency; a source of direct current; I 9. A photogrammetric moving picture camera comprlsing,'in combination, a support, a camera 5 casing having an exposure aperture and mounted on said support for movement about two axes perpendicular to each other; means for moving sensitized ?lm past said exposure aperture, said > and means for alternatively connecting said feed ing motors to said sourceof direct current, for means including a ?rst synchronous motor; a re- 10 volving ?rst shutter member having an aperture and arranged p to intercept and open the path phase adjustment, and to one of said second sources of alternating current, for synchronous of light from said exposure aperture to said ?rm; operation. _ . . a second synchronous motor connected to actuate said ?rst shutter member‘; a second revolving 15 7. In, a photogrammetric recording system a ' shutter member having an aperture and arranged to intercept and open the path of light from said ' plurality of recording moving picture cameras, each camera including a. ?lm feeding mechanism and a ?lm exposing mechanism; a synchronous 20 motor for said feeding mechanism, and a syn chronous motor for said exposing mechanism; a ?rst source connected 'to supply alternating cur rent of a predetermined frequency to all expos ing motors; a plurality of second sources of alter 25 nating current of integer multiples of said pre determined frequency; a source of direct cur rent; a selector switch for each of said second sources of current;,ga common contact operable by each of said selector switches; a. secondary 30 relay arranged alternatively to connect said feed ing motors to said source of direct current and to said second sources of alternating current, re spectively; a line, relay associated to each of said second sources and arranged to connect and dis connect the respective source to said secondary exposure aperture to said ?lm, said second mem~= her being connected to be actuated by said sec,» ond motor at a rate which is an integer multiple 20 of the rate of said ?rst member; a third'revolving shutter member having an aperture and arranged to intercept and open the path of light from said exposure aperture to said ?lm, said third member being connected to be actuated by said ?rst mo 25 tor; and optical means for projecting into thepath ‘of light an image indicating the position of the 1 camera relatively to said support. 10. In a photogrammetric ‘moving picture camera the combination with a camera casing 30 __having an exposure aperture and' means for moving sensitized ?lm past said aperture said means including a ?rst synchronous motor; of, a revolving ?rst shutter‘ membenhavingan vaper and arranged to intercept and open the path 35 .relay, each line relay being jointly controlled by ‘yture "of light from said exposure aperture to said therespective of said selector switches and said secondary relay; a make contact connected to be ?lm; a second synchronous motor connected to periodically operated in response to the frequency it actuate said ?rst shutter member; a second re-> of one of said secondary sources; and a primary volving shutter member having an aperture and 40 relay connected to control said secondary relay, said primary relay being jointly controlled by arranged to intercept and open'_ the path of light ing motors; a. plurality of second sources of ‘alter nating current of integer multiples of said pre ber during a predeterminable periodof exposure from said exposure apert e .to said ?lm, said Q second member being connected to'be actuated said common contact and said make contact. 8. In a photogrammetric-recording system a by said second motor at a rate which is an in ‘plurality of recording moving picture cameras, I teger multiple of the rate of said ?rst member; 45 45 each camera including a ?lm feeding, mechanism a‘ third revolving shutter member having‘ an and a ?lm exposing mechanism; a synchronous aperture and arranged to intercept and‘ open the motor- for said feeding mechanism, and a syn- path of light from said exposure aperture to said chronous motor for said exposing mechanism; a ?lm, said third‘member being‘ connected to be actuated by said ?rst motor; whereby a path 50 50 ?rst source connected to supply alternating cur of light is‘ prepared by said ?rst and second mem rent of a predetermined frequency to all expos ' determined frequency; a source of direct current; 55 a selector switch for each of said second sources of current; a common contact operable by each _ of said selector switches: a secondary'relay ar ranged alternatively to connect said feeding mo tors to said source of direct current and to said second sources of alternating current} respective ly; a line relay associated to each of said second sources and arranged to connect and disconnect while the number of exposures‘ per time unit is controllable by the rate of said ?rst motor. 11. In a _ photogrammetric moving picture 55 camera the combination with a camera casing having‘ an exposure aperture and means for moving sensitized ?lm past said aperture said means including a ?rst synchronous. motor; of revolving ?rst shutter disk having an aperture1 60 and arranged to intercept~and open the path of light from said. exposure aperture to said ?lm; the'respective source to said“ secondary 'reiay, .a second synchronous motor connected to actu each line relay being jointly controlled bythe ate said ?rst shutter disk; 9. second revolving 05 respective of said‘selector switches and said sec ondary relay; a make contact connected to be periodically operated in response to the fre quency of one of said secondary sources; a pri mary relay having make contacts and being 70 connected to control said secondary relay, said primary relay being jointly controlled by said common contact and said make contact; and , shutter disk having an aperture and arranged , 65 to intercept and open the'path of light from said exposure aperture to said ?lm, said second disk being connected to be‘ actuated by said second motor at a rate which is an integer multiple of the rate of said ?rst member; a third revolving 70. shutter disk having an aperture and arranged to intercept and open the path of light from a break contact connected to be periodically said exposure aperture to.said ?lm, said third 0 rated in response to the frequency ofone - disk’ being connected to be ‘actuated by said of said secondary sources, said break contact be ~ ?rst motor; whereby a path of light is prepared 75 6 9,111,516 by said ?rst andsecond'disk‘durlng a predeter minable period 01' exposure while the number oi exposures per time unit is controllable'yhy the time imit is controllable by the rate of said ?rst rate or said ?rst motor. 12. In a photogrammetric moving picture camera the combination with a camera-casing having an exposure‘ aperture and means for mov .camera the combination with a camera caslns having an exposure aperture and means for mov ing sensitized ?lm past said aperture said means ing sensitized ?lm past said aperture said means including a ?rst synchronous’ motor; a revolving ?rst shutter member having an aperture‘ and including a ?rst synchronous motor; oi’ revolving arranged to intercept ‘and open the path of light~ from said exposure aperture to said ?lm; 10 ' 10 ?rst shutter disk having an aperture and ar ranged to intercept and open the path of light from said exposure aperture to'said ?lm;' a sec ond synchronous motor connected to actuate said ?rst shutter disk; a second revolving shutter disk 15 having an aperture and arranged to intercept and‘ open the path of light from said exposure aperture to said ?lm. said second disk being co axially arranged with said ?rst disk and .con nected to be actuated by said second motor at a rate-which is an integer multiple of the rate of said ?rst member; a third revolving shutter disk having an aperture and arranged to inter cept and open the path of light ‘from said ex posureaperturetosaid?lm,saldthirddiskbe ingcoax'ially arrangedwithsaid?rstdiskand connected to be actuated by said ?rst motor; whereby a path of light is prepared by said ?rst and second .disk during a predeterminable period of.»exposure while the number of e per motor. _ 13. In a photogrammetric moving picture a second synchronous motor connected to actuate said ?rst shutter member; a’ second revolving .shutter member having an aperture and arranged to intercept and open the path or light from said exposure aperture to said ?lm, said second ll member being connected to be actuated by said second motor at a rate \which is an integer multiple of the rate of said ?rst member; a third revolving shutter member having an aperture and arranged to intercept and open the path of light irom said exposure aperture to said ?lm, said third member being connected to be actuated'by _ said ?rst motor; a further shutter arranged to intercept and open the said path .oi’v light from said exposure aperture to said ?lm, said further shutter being connected to be operated by said ?rst synchronous motor. ERWIN ROUX.