Patented Nov. 12, 1946 2,410,925 UNITED STATES PATENT OFFICE CAMERA OPERATING CONTROL George T. Burrell, deceased, late of Huntington Station, N. Y., by Helen Haughton Burreli, administratrix, Huntington Station, N. Y., as signor to Republic Aviation Corporation, a cor poration of Delaware Application July 26, 1943, Serial No. 496,103 6 Claims. This invention relates to improvements in pho tographic apparatus, and/more particularly to a (01. 88—16) 2 of standard construction, and having release mechanism (not shown) of a conventional type for exposing the film. The operating action of this mechanism is controlled by a release member graphic ?lm. in the form of a stud 25, the arrangement being Thisapplication is a continuation in part of such that upon each downward movement of the the application of George T. Burrell, filed July stud, one frame of the ?lm is'exposed. 12, 1941, Serial No. 402,069, and which matured The usual main spring (not shown) is rewound' into Patent No. 2,378,182 on June 12, 1945. ' by clockwise rotary movement of a crank it. 'The original application, of which this is a 10 This crank is provided with a slot 25av which continuation in part, contemplates an apparatus receives the stud 25. Upon clockwise rotary that periodically and continuously photographs movement of crank iii, the upper edge and end a ?ight test instrument panel during a test ?ight of slot 25a engages stud 25, to push it down and without any intervention on the part of the pilot accordingly effect release and exposure of one of the aircraft beyond initially starting the oper 15 frame of the ?lm. Return movement of crank ation of the apparatus. Such apparatus includes IS in the counter-clockwise direction permits a constantly effective source of power, and the stud 25 to return to its initial position, where it present invention has in 'view an operating con again becomes effective, when pushed down as trol that will utilize the power of said constantly before, to release the next or succeeding frame effective source to cause a periodic and successive 20 of the ?lm. exposure of the'frames of a photographic film in A rotary oscillatory movement may be im the camera forming a part of the apparatus of parted to crank l9 by any suitable means. As the aforesaid parent application. shown in the drawing, such means may comprise Photographic apparatus to which the improve a triangular plate 23 pivoted at 24. This plate camera operating control mechanism for succes sively exposing the individual frames of a photo ' ments of this invention relate usually comprise a main spring which furnishes the power to drive _ is caused to periodically oscillate upon and from the continuous operation of an electric motor 20 the ?lm-release mechanism, and'a lever or other having a driving connection therewith through suitable means for e?'ecting exposure, of the film, a slotted connecting rod 22 and an eccentric 2i. one frame at a time. Heretofore, it has been It is contemplated by the invention that any necessary to rewind the main spring manually 30 required play may be provided for by using a ~ > after the roll of film, or a substantial part thereof, universal or swivel Joint to connect the rod 22 has been exposed, in order to prepare the camera with eccentric 2|, and by having a su?lcient for exposing the next roll of ?lm. amount of play about the pin 28, ?xed in plate One of the objects of the invention is to pro- ' 23, with respect to the edges of the slot 21 in rod vide photographic apparatus wherein the main 35 22. The throw of eccentric 2i is greater than spring will be rewound automatically as it func the length of slot 21 by an amount su?lcient to tions to operate or drive the ?lm-release mecha- ' make the driving connection through rod 22 nism, and at a rate, or in an amount, substan effective. For example, in the other extreme tially sufficient to restore to the spring the energy position of eccentric 2 I, that is, one hundred and 40 expended in releasing the film, so that the camera eighty degrees from the position shown in Fig. 2, will be in the same condition, in this respect, at the lower end of slot 21 will be in engagement the end of the “run” as it was at the beginning. with the pin 28, and plate 23 will be raised, crank Other objects and advantages will hereinafter I8 will be in its extreme position in the counter appear. ‘ clockwise direction, and the stud 25 will be in its For the purpose of illustrating the invention, 45 upper, initial position ready to effect release of an embodiment thereof is shown in the drawing, the next frame. A pin 28, fixed in plate 23, has wherein a sliding fit in a slot 29 with which crank I9 is Figure 1 is a front elevation, looking toward provided. By such means, the crank 19 is caused the left in Figure 2; and > to oscillate upon and from oscillatory movement Figure 2 is a side elevation, looking toward the 50 of plate 23. right in Figure 1 illustrating the positions occu With the parts in the positions just described, pied by the parts of the instant invention after 1. e. disposed at the opposite ends of the respec a single exposure by the camera. ' tive paths of movement to the positions illus The reference numeral l1 designates, generally, trated in Fig. 2, the continued movement of the ~ a moving-picture or other. suitable type of camera 65 eccentric It will cause the rod 22 to move down :51 m e 3. The combination with a spring driven mo tion picture camera having a main spring, a single frame release mechanism and a projecting wardly on the pin 26 until the latter contacts the upper end of the slot 2i. Whereupon a pull is ex erted by the rod on the pin 26 which swings the reciprocable stud for the operation of the release mechanism, of an oscillatory crank for rewinding the main spring by its movement in one direction plate 23 about its pivot 26 thereby moving the crank; ill in a clock-wise direction which move ment causes the stud to be moved downwardly exposing one frame of the ?lm in the camera H. and haivng means engaging the stud for control ling the reciprocable movement thereof simulta neously with the movement of the crank in either direction, a constantly rotating motor, a disc op erating in unison with said motor, an operating rod eccentrically connected to said disc, and an intermediate oscillating member connected to the extremity of the operating rod and to the crank The motor. 283 operates continuously and for every complete revolution thereof one frame of the film is exposed as above described. Manifestly there-: fore the tempo of the ?lm exposure can he accu rately controlled by regulating the speed of the motor Ell. From the foregoing, it will be seen that the crank is, which is common with respect for imparting a full oscillation to the crank upon to the single-frame release stud 25 and the main each revolution of the disc and motor aforesaid. spring of the camera, is caused to oscillate at a i. The combination with a spring driven. mo~ rate equal to the rate or" rotation of motor fill. tion picture camera having a main spring and a For example, if the adjustment is such that motor single frame release mechanism, of a stud proEli rotates at the rate of sixty revolutions a min ate, the stud 25 will be pushed down to release 20 truding from the camera and reciproca’ole to con trol said release mechanism, an oscillatory crank and effect exposure oi'the ?lm at the rate or“ one for rewinding the main spring or" the camera hav frame every second. ing means of cooperation with the afore ‘it will be understood that various changes, said, whereby the movement of the crank in one such as in the size, shape arrangement of direction to rewind the spring positively moves the parts, may be made Without departing from the spirit of this invention or the scone oi the claims. the stud to expose a single ‘frame and the move ment of the cran... in the opposite direction allows . Having thus disclosed the stud to return to its original position, a com inventive concepts and one mode realizing the same, what is as new and inventive is: ' stantiy rotating motor, a disls rotating in unison » . I... ‘ motor.‘ a pivotally mounted plate, pivotal connect‘"on between said plate and th 0) ‘l. The combination with a s1 extre him of said crank. and a connection be» tween t e disc aforesaid and the plate whereby rotation of the disc causes oscillation c th VA i oinatlon with a camera having a triangular plate pivot‘ vertices, ' gle frame . stud. mova?e to control said release mechanism min and slot connec' ‘c to expose a single other vertex. of plate th said crank, an operating rod, 9 nection between one extre of a crank pivoted to the stud crank camera for oscillates controlling and on having‘ itsthe pivot, aoperation slot andcoacting means thereof for with as oscil~ ' rod and. the third vertex or the rotating motor, a disc on the lating the cranir on its pivot comprising mounted and an eccentric connection ‘ extremity oi said rod. or ' plate osc -lation on a fixed pivot and con“ nected to the extremity of the crank, a consta'" rotating him-oi", an O108"Ei3lllg rod eccei‘ cally pivoted to the shaft oi‘ the motor at one of rotation oi’ the latter: about its pivot in crank. in a clockwise its ends and to the plate at the other of its ends. 59 mainspring of the camera a; aforesaid stud to trip the rel e the continued rotation disc through . remaining 189° oi’ cc “1331 revolution. thereof swings the plate about its pivot in the reverse direction to move the crank. countenclocltwzse and restore the stud to its initial position. 2. The combination with a spring driven mo tion picture camera having a main spring, a sin gle frame release mechanism and a projecting stud ‘for the operation of the latter, of oscilla ' tory crank connected to the main spring having means engaging the stud for the -_ ltan neous rewinding oi the main spring opera tion of the stud upon the clockwise movement of the crank, a constantly rotating power source, an eccentric rotating in unison with said power source, said crank and for a linkage imparting between. one said complete eccentric oscilla tion to the latter upon each revolution of the ‘ill former. singleThe frame combination release mechanism with and a protruding having stud reciprocable to control said release me nism to expose a single frame, of a cranl; mount ed for» oscillation on the camera and having a slot engaging the stud to control the movement thereof in both directions as the crank oscillates, and for oscillating the crank comprising a triangular plate mounted for oscillation‘ on a ?xed pivot at one of its vertices and having a join and slot connection with the extremity i crank at another of its vertices, a constantly‘ rotating motor, and an operating arm eccentriu cally pivoted the shaft of the motor, at one of its ends and a pin and slot connection at the other of its ends to the remaining vertex of plate. EI-IELE'I‘I ‘i-IAUGHTON BURRELL, zlclmz'nistratria: of the Estate of George T. Bur/‘ell, Deceased.