DE961782C - Photographic camera with a self-powered shutter - Google Patents

Description

ISSUED APRDL1957

R 10293IX j 57 a

The invention relates to a photographic camera, preferably a 35mm camera, in which the shutter adjustable to different exposure times by a Auxiliary power, e.g. a spring motor, is driven. In contrast to known closures, at which the shutter drive spring is tensioned each time the trigger is pressed, refers the invention to those cameras in which either a direct one - independent of the release force - auxiliary power drive is effective at the lock or where after each lock cycle the drive spring of the shutter by a motor, e.g. B. a spring motor, tensioned again will. Have cameras that are equipped with an auxiliary power drive in this sense an automatic film transport in a known way, which is controlled as a function of the closure sequence.

In cameras of this type, the shutter is released by the release mechanism after each cycle controlled catching link locked. If you want to take several pictures in quick succession, you have to the trigger can be actuated several times, for which in a known manner one controlled by the shutter electromagnetic release device has been formed.

The invention is based on the object of creating a particularly simple release mechanism, those with motor-driven cameras

Shutter speed adjustable shutter series recordings, makes without the aid of electromagnetic triggers. It is in itself with motion picture cameras with spring mechanism known to make a switch, so that instead of cinematographic Recordings also single images can be recorded. It is also with spring mechanism cameras, set up for Eineelbildaiufnahmeii are known, after each expiration by a controlled by the ίο trigger mechanism catch member for Turn off the production of series recordings !. However, the known arrangement is relatively complicated and expensive to manufacture. The invention consists in that a manually operated trigger with a release lever and one coaxial with this mounted catch member, on which the catch nose of the lock arreitiert before it comes to rest on the release lever, cooperates in such a way that the ao catching limb when actuated; of the trigger briefly comes into the release position, but when the catch is released it already resumes its locked position, before the release lever is brought into the release position by the release and the catch as releases for the lock, and that the catch member by means of an adjustment device that can be operated from the outside can be locked in the release position.

It is achieved by placing the camera under

Maintaining your work cycle - release, exposure, film transport, var circuit voltage - runs under the influence of the auxiliary drive as long as the trigger is actuated.

The figures show a schematic representation an expedient embodiment of the invention.

In the housing ι the camera is behind the Belidbtungöffung i 'a circumferential shutter disk 3 provided with an exposure section 2 stored. The closure disk 3 is driven via an angular drive 4 through a with a pinion 5 provided and mounted in the housing 1 shaft 6. The pinion 5 meshes with one side a ring gear 8 attached to a spring housing 7, on the other hand with an intermediate door drive wheel 9 on which. in a known manner, not shown, an inhibiting mechanism which determines the exposure time attacks. With the intermediate drive wheel 9, a pinion 10 is in drive connection, the one with a locking disc 12 provided with a catch 11 wearing. The catch 11 lies under the influence of the drive spring housed in the spring housing 7 against a catch member 13 which is mounted coaxially at 14 with a release lever 15 in the housing ι. The fang link! 13 towers above the release tab 15 a little so that the catch 11 only then come to rest on the release lever 15 can: when the catch member 13 is shown in dashed lines in di © Release position is brought. The catch member 13 protrudes with a nose 16 into the web a pawl 18 pivotally mounted on a release slide 17. The release slide 17 is in the housing 1 through pins 19, 19 'out and on a return spring 20 attached. An arm 21 of the catch member 13 protrudes into the path of one with a Pin22 provided lever 23, which can be turned from the outside by an adjusting knob 24 in the direction of the arrow, can.

A cam 25, by means of which a locking lever 26 can be triggered, is seated on the drive shaft 6. Of the Lock lever 26 locks a film transport shaft 27 to which a pinion 28 is connected. The pinion 28 meshes with the ring gear 29 of another barrel 30.

The cores of the barrels 7 and 30 Housed spiral springs are connected to the elevator member 33 by an elevator gear 32, 32 '.

The mode of operation of the described arrangement is as follows: By rotating the elevator link 33 the springs in the barrels 7 and 30 are tensioned together. When the trigger slide 17 is depressed, presses the pawl 18 on the nose 16 of the catch member 13 and brings this for a short time in the release position, so that the catch 11 is released and attached to the Release lever 15 applies. However, after a certain path of the trigger 17 snaps the Nose 16 from the pawl 18, and the catch member 13 returns to its locking position, but is now behind the one on the release lever 15 lying catch nose 11. When you continue pressing the release slide 17, the Versdhiuß is through the Release lever 15 triggered, both the locking disc 3 as well as the locking disc 12 almost Make a full turn until the catch 11 catches on the catch member 13 again.

Nadh termination of the exposure process is' triggered by the cam 25 and the locking lever 26 of the film transport and the film through the transport roller 27 moved further by one image width. After letting go of the trigger 17 this goes back in its starting position, the pawl 18 of the nose 16 yields resiliently.

By turning the adjusting knob 24, the catching member 13 can be switched off by locking it in the release position by the pin 22 of the lever 23 striking against the arm 21. If the release slide 17 is depressed when the catch member 13 is switched off, the shutter and film transport run continuously in the manner described until the catch 11 catches on the release lever 15 again after the release slide 17 is released. It is possible in this way to mow a series of residences until the spring force stored in the barrels 7 and 30 is used up.

Claims (1)

PATENTANSPKUGH: Photographic camera with an assistant, preferably a spring iao motor-driven shutter that can be adjusted to different exposure times locked after each process by a catch member controlled by the release mechanism is, which can be switched off for the production of series recordings, characterized in that a manually operated release (17) with a release lever (15) and one on the same axis with this mounted catch member (13) on which the catch nose (11) of the lock is locked before it comes to rest on the release lever (15), cooperates in the way, that the catch member (13) when the trigger (17) is actuated briefly in the release position comes, but after releasing the catch already resumes its locked position before the release lever is brought into the release position by the release and the catch for the lock releases, and that the catch member by an externally operated adjustment device can be locked in the release position. Considered publications:
German Patent Nos. 711 659, 319828; Swiss patent specification No. 239 222. 1 sheet of drawings © 609 658/257 10.56 (609 855 4. 57)