Patent GB-357569-A (GB)
Title: Improvements in or relating to spring driven apparatus for taking moving pictures
IPC: G03B1/12
Filed: 1930-06-21
Abstract: 357,569. Kinematograph cameras. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin.-(Assignees of Projector Ges.; 28, Wilhelmstrasse, Berlin.) June 21, 1930, No. 19021. Convention date, July 10, 1929. [Class 97 (i).] In spring-driven cameras in which a series of kinematograph images or a single image may be taken by operation of the same release, two locking members are provided, selectively operated by the release, one alone being always operative to start the apparatus, and also to stop it when taking kinematograph images, and the other, for taking single images, being moved into position, after the apparatus has been started, to engage a stop after one revolution of the spindle carrying it, and stop the apparatus ; film marking means may be provided which is automatically operated when single images are taken. As shown, a release, in the form of a knob 13, is mounted on a pin 14 engaging a U-shaped slot 15 and carried by a lever 7 pivoted on a pin 5 and having a projecting nose 8. Two locking members are provided in the form of nose pieces 3a, 4a on levers 3, 4, the levers being respectively pivotally mounted on the pin 5 and a pin 6 and held by tension springs 10, 17. When the parts are in the position shown, and the knob 13 is moved into the lower limb of the slot 15, the nose 8 on the lever 7 engages with the lever 3 and turns it, to disengage the nose piece 3a from a stop 2 on a driven spindle 1, and permits the spring to drive the apparatus so as to take kinematograph images. When the knob is moved into the upper limb of the slot 15, movement of the lever 4 is also effected, by the engagement with it of a projection 11 on the lever 7. This movement causes the nose piece 4a to move into the path of the stop 2 and arrest it after substantially one revolution and the exposure of one image. The lever 7 engages the pin 5 by means of a slot 9, to permit the knob to be moved into the upper limb of the slot 15, and the lever 4 has a recess 12 freely receiving the projection 11 when the knob is moved into the lower limb. A modification is described in which the U-shaped slot 15 is replaced by a straight slot, and a removable pin is inserted between the levers 4, 7 when single exposures are to be made. Figs. 3 and 4 show film marking means comprising a stamp 31 which dents the film when it is operated, the stamp being mounted on a pivot 32, and connected by a link 33 to a lever 34 which is mounted on a pivot 35 and engages in a hole 36 in a locking nose-piece 3b pivoted on the lever 4. A spring 37 normally holds the stamp in the position shown, but yields. under the impact of the stop 2 on the nose-piece 3b to permit the stamp to operate. The marking device may operate by light action. The Specification as open to inspection under Sect. 91 (3) (a) describes also apparatus comprising an intermittent shutter 20, Fig. 3 (Cancelled) and Fig. 4 (Cancelled), which is carried by a sleeve 21 rotatable relatively to the shutter spindle 19, and is connected to it by a spring 24. Stops 22, 23 respectively carried by the spindle and sleeve ensure that the shutter is normally driven by the spindle, but, when single images are to be taken, the shutter is rotated manually, backwards on its spindle, through one revolution, to tension the spring 24. It. is held in this position by any suitable means, so that, when it is subsequently released, the spring 24 rotates the shutter to effect the exposure. A second shutter, controlled by a lever 27, is provided in connection with the lens 26, and a lever 28 rotatable by a knob 30 is also provided. When the shutter 20 is to be set for single exposures, the lever 28 is turned from the position x to engage the lever 27 and move it downwards to close the second shutter, and afterwards pass out of engagement with it. The shutter 20 is then rotated backwards, and a stop 25 on it moves the lever 28 back to the position x causing it also to move the lever 27 back and open the second shutter. Release of the shutter 20 then effects exposure, and also causes the film to be fed one space. This subject-matter does not appear in the Specification as accepted.