SU15192A1 - SLR camera - Google Patents

Description

The invention relates to well-known, provided with curtain shutters, SLR cameras for shooting both on plates and on film tapes.

The proposed SLR camera for filming on film makes it possible to 1) install the washer-equipped toothed drum disc with a plate to eliminate the bending of the film to automatically push the latter from reel to reel; 2) using a curtain shutter with three constant slits to obtain different shutter speeds, using your finger on the pointer to move the plate and the release button, coupled with the levers, first raising the mirror and then making the shutter; 3) using the retractable lens rim fitted with a diaphragm ring, obtain magnifications slightly larger than the negative format and take pictures of closely spaced objects, and 4) squeeze the hillocks on the film using a punch to mark the boundaries of pictures or series of shots for about the phenomena.

In FIG. 1 shows a vertical longitudinal section of the chamber; Fig, 2-transverse e section; FIG. 3- part of the release button; FIG. 4-horizontal section of the camera; FIG. 5 - detail of the curtain shutter.

The lens of the camera, placed in the depth of the screw-hole (or helicoidal) rim 35 (Fig. 4), the travel part of which is located outside the camera body, is equipped with an aperture ring 19 and can be pulled out of the rim 35, which is very important to obtain magnifications exceeding the format of the negative - and for shooting closely spaced objects The camera is equipped with a curtain shutter with three constant slots, the first of which is equal to the full format of the image, the second half of the image and the third to quarter of the image. The speed of passage of the slots can be adjusted by tensioning the spring placed in the winding roller 4. The main shutter mechanism consists (Fig. 5) of a small gear 38 sitting on an axis; a roller that winds up the shutter at the factory and doubles the gear 40 connected to It, on which there is a locking pin 37 on the front side and a round finger on the bottom (shown with a dotted line); on the square bushing, the crank handle 16 is seated. When the valve is seated, the pin 37, going clockwise, passes freely between the hook 43, tilts it to the left, and the latch 44 ,. Sway a little to the right. With each turn of the serrated teeth, Maltese star 41 with a finger on the underside of the serrated teeth, moves to one beam and svetlt

The jiHCK 42 is installed against the window in the lid covering the entire mechanism. Above the window there are 1.1, 1/2 1/4, and since one turn of the large Gears coil a piece of curtain, an equal slot closes, the disk will thus indicate which slot is intended for the job. In case a slit 1/4 is installed, but it is required to remove with a slit 1/1, then by pressing the lever 39 sideways, slits 1/4 and 1/2 can be skipped with the mirror closed. When the trigger button 15 (Fig. 3) is pressed, the hook 43 moves to the left and releases the pin 37, which, having described the complete circle, is held by the latch 44, which has replaced the hook 43, and when the button is pressed, the latch will again replace the hooks; therefore, gear 40 with one pressure will not be able to make more than one revolution or miss more than one slot. In order to obtain a shutter speed, the end of the 45 parts can be moved to the pointer 46 (dashed) with the aid of an eccentric finger several left so that when the button 15 is pressed, it goes even more left together with the entire hook system 43 and holds the pin 37 half way. that with a full slit makes it possible to produce an exposure. The flat spring 47 returns the system 43 to its original position. The trigger button for lowering the shutter consists of the button 15 itself and three separate levers 27, 22 (three-pointed) and 23. The levers 27 and 23 are rigidly connected by an axis 28, and the lever 22 sits freely on the axis and is connected to it by a spring 29 When the button 15 is pressed, the mirror 26 first rises, rotating on the axis 25. The lifting ends when the lever 23 rests on the pin 24, after which only the lever 22 presses the hook 21 of the hook system and releases the shutter. The tape 39 is wound with a coil 34 (FIGS. 1 and 3), which holds about 3.5 meters, passes through the tooth drum 1 and slides over a steel polished plate 5 with a window, bends around the guide roller 33 and coils onto the coil 36. Coil 36 The transverse key is seated on a forked trunnion 9, which extends downwards and returns to its place with a spring, like all other cylindrical trunnions on which the coils rotate. The trunnion 9 sits inside the gear 10, coupled with a toothed crown of the drum with a flat clock spring 6. The spring is wrenched by a wrench 8 and held by a ratchet 7. The toothed drum 1 has a washer with a tongue 2 coming into the vertical groove of the cylinder 3 only in the raised position (from below) and leaving it, on the other side of the cylinder, while lowering it. The lowering of the cylinder is achieved by pressing the button 11, and the raising by a spring enclosed in the guide tail of the cylinder. The tape, worn on the teeth 1 and screwed onto the coil 36, is pulled by the drum spring and to eliminate some transverse. The back bend is pressed against the plate with window 5 with a special nnatrnHkoy 31. When the button 11 is pressed, the drum 1 is released and the tape moves by the main (initial) circle automatically. The speed of the drum is marked with a special counter, not shown in the drawing. When shooting, focusing is performed on frosted glass 13, to which the image given by the lens, the mirror 20 and the handle 18 of the worm gear of the lens reflect. The frosted glass is closed by a lid 12, which opens itself when pressing the button 14. The boundaries of the images or series of images are determined before manifestation through the extruded tubercles, which is carried out using a special punch 30 having a button 17 (Fig. 2 and 4).

The subject of the patent.

Reflex camera for filming on film, characterized with the cumulative use of: a) devices for automatically moving the film from the reel 34 to the reel 36 consisting of a toothed drum 1 equipped with a washer 2 with a tongue (Fig. 4) entering the vertical groove of the drum 3 in its raised position, for lowering; and one of which the drum 3 is a button 11, and for lifting a spring in the guide process of the drum, and a plate 31 is provided to prevent bending of the film; b) a curtain shutter with three constant slits for different exposures consisting of a gear 38 on an axis of a roller winding, engaging with a gear wheel 40, fitted with a locking pin 37 and passing between a hook 43 and a latch 44, a Maltese star 41, a lever 39 and a release button 15; a finger is provided on the pointer 46 to move the plate 44 (Fig. 5) to obtain the shutter speed,

and the shutter-release button 15 (Fig. 3) is articulated with the levers 27, 22 and 23 so that the zinc-26 rises first, and then the shutter starts to descend; c) a retractable lens with rim 19 for the diaphragm, and d) punches 30 with button 17 for extruding tubercles in the film in order to mark the boundaries of images or series of images for manifestation.

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