DE1189374B - Photographic shutter with two sector systems - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

G03b

German class: 57 a -32/01

Number: 1189 374

File number: C 28538IX a / 57 a

Filing date: November 30, 1962

Opening day: March 18, 1965

The invention relates to a photographic Closure with two sector systems running independently of one another from a clamping position, one for opening and the other for closing the shutter through hole serves, and with a control device for successively releasing the two systems the end.

There are already known closures with two sector systems, each of which is driven by a ring will. A control ring that is independent of the two rings is provided, which at the same time is triggered with the first, the shutter opening accomplishing ring to the expiration and after a adjustable period of time on the locking member of the second, bringing about the closure closing Ring occurs and releases the same to expire. However, this type of construction is disadvantageous in that The first ring and the control ring run independently of each other after triggering and this as a result different influences acting on them a synchronization between the shutter opening and Closing movement cannot be brought about with the required accuracy.

Furthermore, in a camera with a focal plane shutter, there is a release mechanism for the drainage barriers of both focal plane shutter curtains has been proposed which trip mechanism consists of two mutually adjustable, each there is a plurality of chain links having transmission chains. Such a release mechanism is also satisfactory not yet, because it is not only complex from a structural point of view, but also as a result of it totaling engagement play between the two gear chains ensures precise time synchronization which can also not ensure process operations.

It is now the object of the present invention to provide the required accuracy in the time sequence synchronization not only between the two sector systems alone, but also between the same and other locking devices, such as advance inhibitor, long-term inhibitor or flashlight contact device short exposure times to ensure absolutely necessary accuracy. This object is achieved according to the invention in that the control device comprises a control element which has control projections arranged at a fixed distance from one another, of which at least one causes the release of the drainage block of both the opening system and the closing system during the process movement of the control element from a starting position and the others for entrance or exit photographic shutter
with two sector systems

Applicant:

Compur plant

Limited Liability Company & Co.,

Munich 25, Steinerstr. 15th

Named as inventor:

Rudolf Lang, Nettelkofen near Grafing;
Peter Lermann, Munich

setting of further locking devices that can be optionally switched into the locking function sequence to serve.

When using lockable in the clamping position the main drive members for the two sector systems, it is particularly preferred, equipped control member as one with a return spring to form "5 lockable by manual trigger in the cocked starting position clamping ring which in addition to the control projections has two clamping projections which, when the Movement of the clamping ring in the starting position also brings about the transfer of the two main drive elements into the clamping position.

The invention is explained in more detail in the following description using a few exemplary embodiments. It shows
F i g. 1 the lock in view,

F i g. 2 shows a cross section through the closure along line H-II of FIG. 4,

F i g. 3 to 7 the closure in different operating positions in plan view with the removed Front panel,

F i g. 8 the built-in flash light contact device in view and in the direction of arrow A of FIG. 3,

F i g. 9 and 10 a further embodiment of the gear chain for opening and closing the Locking sectors and

Figures 11-14 show various shutter operating diagrams.

In the closure housing 10 two independently running sector systems are accommodated, one of which for opening and the other for closing the closure passage opening

509 519/257

serves. Each sector system includes, for example, the shutter is rotatably mounted and has a five sectors, of which, however, the clear outer, the exposure time scale 48 s carrying only one opening sector 12 o and a collar 48 e is coupled to rotary motion.
Closing sector 12 s are shown. Every ten seconds in the lock housing 10 is a around the axis

Doors are of the same shape and rotatably mounted from the same clamping ring 50, which is made by a backing material, so that they can be interchanged with one another adjusting spring 52 with a nose 50 in a clockwise direction. The two sector systems are suppressed in a rest stop 1Or of the lock housing in two spaces axially one behind the other. Furthermore, it is brought with a dowel pin 50i, which is formed by two plates 14, 16 embedded in the closure housing, a release pin 50α, a driver pin 50m, and an intermediate plate 18, a contact actuator 50k, a toothed segment 50 are. One and a further segment 50 1 are always equipped, the opening sector 12 o and a closing sector 125 of which are designated on ends with 50i 'and 50i ".
a common, stationary and in the plates. The toothed segment 50 z is connected to a gear 54

14, 16, 18 recessed bearing pin 20, which is in engagement, which is firmly bound to a tensioning shaft 56 through slots 12 oo or 12 ss of the sectors, which reaches through the rear wall of the lock. To pivot the sectors, there are projecting outside unid here with a camera-side single drive rings 22ο or 22 s, which direction, for example with the film transport gear, kuppelje carry five drive pins 24 ο or 24 s , which are in cash. A gear train 54 h associated with drive elements of the sectors engages on the gear wheel 54. with a climbing wheel 58 and a second climbing wheel. One driving pin 24 00 and 24 ss each is connected to the attachment 20 60. The latter interacts with one of the drive rings mounted in such a way that it interacts with an inhibitor anchor 64 seated in the inhibitor plate 62 slot. 26oo and 26 ss of the associated main propulsion The drag plate 62 is rotatable about the pin 66 disk 26 and 26 ο engages s. This main drive is mounted and has a run-up curve 62 a, one discs are on stationary bearing axles 28 ο or control pin 62 b and a recess 62 c, 28 s rotatably mounted and with drive springs 30 ο 25 a directional spring 67 strives to the control pin de- or 30 s, each of which is anchored in a stationary counter-clockwise direction on the one hand and against a second and on the other hand is coupled to the main drive control cam48 rr desZeiteinstellringes48. Since the main drive pulley is also provided with a one-armed release lever 68 equipped with a pin 68 α 26 s of the locking system behind the sector level, it strives with a spring 70 arranged in front of this plane to fix it against the auxiliary disc 32 connected to which to pivot the clockwise direction.
mainspring30s attacks. The auxiliary disk 32 has a forward gear shift lever 72 around the

a nose 32 ″, which is rotatably mounted with a pivot lever pin 74, which has two locking 33 cooperates. has notches 72 a, which alternate with an am

A gear chain is arranged between the main drive disk 26 o and the fixed lens barrel 35 built-in locking device auxiliary disk 32. tion 75 in engagement in certain switching positions. A pawl 34, which holds the auxiliary come and the switching lever in its setting position disk 32 in its clamping position, forms the securing. A pin 72 b, which is firmly connected to the shift lever gear member of this like a differential 72, engages in an elongated hole of a transmission chain formed, the input member of which is also a locking member 76. The locking member 76 is in turn optionally is designed as a locking pawl 36 and the main with a three-arm lever 78 hinged to the drive pulley 26 ο in the clamping position holds. The pawl 34, which in turn is rotatably mounted in a stationary manner around the stationary pin 80, is mounted on one in the circuit board 14. On one arm sits a set pin 38 rotatably mounted and with a forward retardation anchor 78 α, the second arm has a gear 34 z fixedly connected. The other pawl 36 45 control lug 78 & open, and one end of the spring 82 is mounted on a bearing sleeve 40 so that it can rotate on the last arm. The net has a radial nose 36 and is anchored to the pin 72 b with another spring end. The gear 36 z firmly connected. Furthermore, the spring 82 strives to pull the lever 78 against the bearing sleeve 40 a second gearwheel 42 z rotating in a clockwise direction; it is stored weaker than the borrowed. A double gear wheel 44, whose around 50 spring force of the grid 72 a, 75. The locking member 76 catch gears 44 ζ and 44 zz different parts still have a downwardly bent circle, stands with the corresponding tabs 76 a.

toothed gears 36 z and 42 z in engagement. In the lock housing 10 is a flashlight indicator

the gear 42 ζ engages with the pawl 34 fixed nipple 84 attached. One pole of this connected gear 34 z a. The double gear 44 55 connection nipple is connected to the mass of the closure seated on a pin 46 p of a web 46, which is connected, while the other, kept isolated has a further pin 46 pp and with the same pole with a contact plate 84 a conductive in the Bearing sleeve 40 is pivotably mounted. connected is. Furthermore, the gears 36 ζ and 42 ζ represent the sun-shaped like a spring rocker contact wheels of the above gear chain forming So spring 86 screwed on and thus with the ground pole differential, while the double gear 44 is connected to electricity, with you bent its teeth 44 z and 44 zz the planet gear tongue end forms an inner surface 86 α and an outer surface of the same. Has surface 866.

A control pin 46 r is on the web 46 the pin 46 p Finally, a shutter release 88 is also im

mounted opposite and works in the after- 65 lock housing housed, which works with the locking notch 50 χ of the clamping ring 50 with a standing still more detailed manner, step-shaped cam 48 r of a time setting The lock described above can open

ring 48, which can be switched on the front of the following setting cases:

I 189 374

5 6

A. Normal closure sequence when this movement ceases, the pawl 34 falls into effect Exposure times from V2000 to Vsoo seconds of the spring 34 / in a recess of the auxiliary disk (Short term); 32 and holds the two disks 32, 26s of the

B. normal locking process when setting the locking system in the clamping position. Exposure times from V250 to 1 second (long 5 In the meantime, the driver pin times); 50m taken up its clamping position, whereby the

C. Closure sequence with advance work use and lever 68 with its pin 68 α under the action of

D. Shutter sequence when using the flash. Spring 70 assumes the position according to FIG. Also the

_. ... _n . Contact actuator 50 k has reached the clamping position,

A _{10 where} b _e } _he to the outer during the clamping movement

In Fig. 3 the closure is shown in the rest position after surface86 & the contact spring86 and a recording. The forward drive is the same to the center of the axis and completely disconnected from the contact spring by the switching lever 72, so that 84 has moved away α in order to avoid contact during the engagement between the armature 78 α and the tensioning process. Finally, the climbing gear 58 is released. The second armature 64 is also the clamping ring 50 through the release 88 on which, with the help of the steering wheel 60 of the escapement, apart from the locking catch SOx in the clamping position according to FIG. 4, it is fixed. The two sector systems have stopped with theirs.

exaggerated shown in the elapsed position, where 'by turning the time setting ring 48 e

the sectors 12 ο of the opening system outside the now the desired short-term value, in our case

Shutter passage opening are, during the 20 game V1000 seconds, the exposure time scale 485

Closing sectors 12 5 · close this opening. Is set 10 m opposite the stationary mark, where-

now the lock is cocked, the drive wheel is the corresponding switching stage of the control

54 via the tensioning shaft 56 counterclockwise curve 48 r with respect to the control pin 46 r . the

rotated meaning, wherein the clamping ring 50 is also the second cam 48 rr of the timing ring 48

moved in the same direction. First there is the 25 opposite the pin 62 & the retarding plate 62

Dowel pin 50 s with the inclined circumferential surface 26o / and is dimensioned so that when setting V2000

the main drive pulley 26 ο in engagement and until Vsoo seconds the armature 64 with the steering wheel 60

pivots it counterclockwise, where it is held out of engagement.

when the drive spring is tensioned 3Oo. Briefly by actuating the trigger 88 the Spannnach comes the pin 24 00 of the drive ring 22 ο 3 ° ring 50 released and moved under action with the slot 26 00 of the main drive disk 26 ο the spring 52 clockwise. It engages, so that this drive ring now moves the release pin 50 a on the arm 36 π and the sectors 12 ο of the opening system at pawl 36 and pivoted the same against the further tensioning movement of the lock through the force of the spring 36 / clockwise. Close the opening completely. When the elevator of the 35 direct course of the clamping ring 50, the tensioned clamping ring 50 is counterclockwise, the main drive of the opening system is also moved in the same direction as the release pin 50 a. given whether the pawl 36 is out of engagement with this movement, the pawl 36 follows under the main drive pulley 26 ο. The same now runs after the spring 36 / until it is in a clockwise position under the action of the drive spring 30 ο out of the chip recess on the circumference of the main drive pulley 40, the drive 26 ο engaging and the same in the clamping position - ring 22 ο carried along and holds over a certain one. Only now does the release pin 50 α detach itself from the angular amount in an anti-clockwise direction, arm 36 η and runs alone further in the direction of is, so that the opening sectors 12 ο out of the clamping position. final passage opening are moved out. The exposure process begins when the pawl 36 is moved counter to 45. In this case, the second pawl control pin 46 r also hits the control cam 48 r in a clockwise direction and is thus prevented from further movement in the clockwise direction via the differential gear. Meanwhile it is moved for a long time until it hits 32 on the circumference of the auxiliary disk and the driver pin has reached 50 m on the lever 68 and continues to move and takes the same clockwise with it, so that it is prevented. By turning the pawl 50 further, it disengages from the locking plate 62. 36 in the clamping position of the control will now The lifted r by the differential gear with the lock pin 46r of the cam 48 and latch 36 of the opening system on movement gedas planetary gear 44 rolls with its interlinking kuppelte pawl 34 of the locking system is wähnung 44 zz on the gear 42 z clockwise rend the initial movement of the pawl 36 through. The starting position of the control pin 46 r is reached 55 frictional engagement with the disc 32 in its tensioner only when the pawl 34 is held immovable, as in position. It begins, however, as will be described below, in which, from that moment on, counterclockwise Fi g. 4 position shown can move. to move, as the control pin 46 r through the switching Now comes the end 50 f of a segment curve 48 r at its further pivoting movement ent-50i, which sits on the clamping ring 50, with which 60 is prevented counterclockwise. After lever 33 engages, the latter engaging the a certain pivoting path of the pawl 34 nose 32 η of the auxiliary sscheibe 32 and the same is the tensioned main drive 32, 26 s of the main drive disk 26 s including the main drive disc clockwise system released to expire. The closing pivoted. During the tensioning, sectors 12 s now begin - the engagement between 65 ring 22 s is driven one after the other via the drive of the spring 30 s - produced from the outside against the pin 24 ss and the slot 26 ss and to move in the middle of the closure opening, see above that the sectors 12s of the closing system from the closing phase of the exposure process begins, so the closing passage opening is moved out. At the end soon the closing sectors 12 s the edge of the

7 8

achieved circuit through opening and exceeded (H _zus) coupled from the Ankerhemmwerk 64 to have (F i g. 5). The exposure process can then be achieved longer exposure times (long times), ended when - as in FIG. 3 shows - the closing It should be obvious that one could close not just one, sectors 12 s, the closure passage opening fully, but several such inhibiting constants in the manner described, while the closure sectors 12 o 5 could be made switchable to now outside this opening lie. The adjustment range of the exposure time setting in the desired lever 33 was also made possible by means of the nose 32 «in the auxiliary manner, disk 32 during this sequence movement into the rest position.

position pressed. Since the pin 50 s on the clamping ring 50 is an adjustment device C

Has an inclined surface of 50 ss and contrary to a non-OK. This is done in such a way that the can be pressed into the clamping ring, it is shift lever 72 from the position "0" to the bearing against the end of the movement of the clamping ring 50 pin 74 counterclockwise in position below the running in rest position and with a »V« given away. When switching on the main drive pulley 15 provided with an inclined surface 26 *, the spring 82 tries to slip under the three-armed lever 78 26 ο so that all locking elements around the pin 80 counterclockwise to the position shown in FIG. 3 move to take the rest position shown again, the lever 78 in turn the locking ability, member 76 moves to the right until the tab 76 a des-It is evident that with short exposure the same on the circumference of the idle times (short times) the time span (Z in Fig. 11 20 auxiliary disk 32 abuts and from a further displacement and 12) between the time of triggering of the exercise is prevented. In this position, the control opening system and the time of triggering the nose 78 b of the lever 78 does not protrude into the movement path of the locking system solely from the distance between the control and the clamping ring 50, and the engagement between the pin 46 r and the control cam 48 r of the timing armature 78 α and Steigrad 58 has not yet been completed, ring 48 is dependent on β, because the frictional resistance 25 so that the full tensioning of the closure can be carried out on the running closure parts (hindered).

Finally, the constant edge hem- If the fastener is now cocked, then at the end of the day

mung at 54 h, 58 and 60) as a constant under the tensioning movement the locking member 76 can provide with its. This period of time (Z) can be set as desired and continuously as a result of tabs 76 a in a recess of the auxiliary disk 32, which is in the tensioning or switched-on differential position according to the invention, under the action of the gear chain. Spring 82 fall, the control nose 78 b in the

Movement path of the segment 50i on the clamping ring 50 setting case B is pivoted and the engagement at 58, 78 a is established

becomes (Fig. 7).

If the operator wishes to take a picture with a 35. When triggered, the forward movement immediately enters into a longer exposure time (long-term), so he must cease the activity as soon as the clamping ring 50 is in motion, setting the time setting ring 48 e accordingly, for example on. After a certain lead time, V250 seconds are gone. With this setting, the end 50 1 ″ of the control curve 48 rr of the time setting ring 48 assumes a position indicated by dash-dotted lines in segment 50i on the control lug 78 & of the lever Fig. 6 (approx. 12 to 15 seconds), so that 40 78 so that the latter as the tension continues in the course of the release movement, the locking plate 62 ring is pressed out of the runway of the same under the action of the spring 67 against the clock and thereby switches off the forward drive armature 78a the locking member 76 to the left anchors 64 comes into engagement with the climbing wheel 60. weget, so that the engagement between the tab 76 a If the lock is released in front of such a receptacle 45 and the auxiliary disk 32. The segment is tensioned, the driver pin 50 comes m of the 50i is dimensioned in its shape so that after the clamping ring 50 with the start-up curve 62 a of the inhibiting shutdown of the advance work, the control nose 78 & plate 62 in contact guide and pivoted the latter in the same supported on the inner surface and the clockwise direction, so that the anchor engagement is released. ker 78 α is prevented from further intervention. The lever 68, which, under the action of the spring 70 50, has followed the further sequence of the clamping ring 50 and which has followed the driver pin 50 m, can now take place in the retracted locking plate 62 with its pin 68 a in the same manner and when the locking functions are initiated Way, as above under case A, fall in recess and hold the same blocking. or B has been described.

After activating the trigger 88, the "

Tension ring 50 to move clockwise. 55 Jnnstelliall υ

After a certain start-up time, the device strikes the lever 68. In this case, it is a flash light pick-up pin 50 m and detects it. When the clamping ring 50 is released from the it pivots in the same direction. As a result, the contact actuator 50 k reaches the clamping position after the locking engagement between pin 68 a and recess of a certain drainage movement with the inner surface 62 c, so that the locking plate 62 under spring 60 86 a of the contact spring 86 in contact, so that the action counterclockwise pivot the same against the stationary contact plate 84a. In doing so, the armature 64 presses the climbing wheel and flashlight contact is given. When the inhibitor engages in order to inhibit the tension that takes place as the contact actuator SOJt continues to move in the direction of its spring 52, the tension finally slides off the ring 50. 65 contact spring 86, so that the latter is back in

The variable, explained under setting case A, is the contactless rest position. The timing of the Time span (Z) for short periods is therefore in the prior contact, due to the relative position of the lying setting case B with an inhibition constant parts 50 it and 86 a, is determined so that the lightning

The light of the flash lamp L only lights up when the shutter is fully open.

In the case of the flashlight contact device described, contact is always made only at a specific point in time of the closure sequence given by the relative position of the contact parts 50 k and 86 α. However, in a further development of this design, the contact spring 86 could be displaceably arranged on the circumference of the lock housing 10 and secured in the respective setting position with a latching device. This could change the relative position of the contact parts and thus also achieve a variable setting for different flash light pre-ignition times ("M" or "X" contact).

The flashlight contact device described is of course also available with a forward drive (case C) Setting cases A or B can be used.

In the second embodiment according to FIG. 9 and 10, the structure of the gear chain for opening and closing the locking sectors is made similar to that of the first embodiment. Corresponding parts are therefore provided with the corresponding reference numerals. In contrast to the first example, however, the pawl of the locking system sitting on the pin 38 is separated into two functional parts, one part from the pawl 34 'with an upwardly bent tab 34 d and the other part from the one in the gear 34 z' Driving pin 34 s' consists. The control curve of the exposure time adjusting ring 48 e , which interacts with the control pin 46 r , is designed here as a guide slot 48 r ′.

As a result, the control pin 46 r is always pivoted when the timing ring 48 is rotated, so that the angular position between the driver pin 34 / and the tab 34 d of the pawl 34 'can be changed continuously in a certain range via the differential gear.

Fig. 9 shows the cocked position of the lock. If the clamping ring 50 is now released when it is triggered, its trigger pin comes on again 50 α after a certain start-up time with the arm 36 η in contact, the pawl 36 in the Moved clockwise, releasing the opening drive as in the first example. Above the differential gear moves - with the pawl 34 'at a standstill - against the gear 34 z' clockwise so that the driver pin 34 / after a certain period of time with the tab 34 α ' the pawl 34 'comes into contact and the latter now takes along in the same direction, so that the locking drive is released to the process. The further closure sequence takes place as in cases A to D above described.

By adjusting the position of the control cam 48r relative to the control pin 46r (FIGS. 1 to 8) or the driver pin 34 / to the tab 34α '(FIGS. 9 to 10) of the differential gear chain according to the invention, it is possible - like the schematic opening diagrams according to FIGS. 11 to 14 show - regulate the time between the time the opening system is triggered and the time the locking system is triggered within certain limits (Z _min to Z _max ) given by the lock structure in a very simple manner and thus set the exposure time as required. If sufficiently strong drive springs are used, exposure times (effective times t _e ) of about V2000 to Vsoo seconds can be achieved with the aid of the setting gear according to the invention with given, constant drive springs with a full shutter passage _opening (D voil) . This can be achieved because none of the sectors is subjected to a movement reversal during the exposure process and because the slow start-up of both sector systems takes place after their respective activation in the overlap (Uo or Us) , so that, as the diagrams according to FIG to 14 show that only the steep movement flanks of both systems are used to form the exposure diagram.

For longer exposure times (V250 second and long) one will apply a switchable by the timing ring to different degrees Hemmstufen Hemmwerk (H _zus) and leave it to the central control member 50 after its initiation, delay to the flow beginning of the closing system over an even longer period of time to be able to.

With the locking system described, with the same drive spring forces, the exposure times could be shortened even further to below the limit specified for full opening by bringing the setting elements 48 r, 46 r or 34 /, 34 a 'directly into engagement and in this way immediately at the beginning of the After the opening phase which begins after the input pawl 36 or 36 'has been swiveled away, the output pawl 34 or 34' also takes along so that the release time of the locking system takes place in the shortest possible time span (Z _min ) after the release point of the opening system. In this case, exposure times of up to V3000 seconds, for example, could be achieved (FIG. 14), although the two systems do not _open the shutter passage opening up to the full diameter (D voU) during the exposure process, but only up to a certain, smaller one Opening passage (Dd).

The inventive assignment of the various control means to the clamping ring 50 is In addition, this member designed as a central control member, which all locking functions (Tensioning and releasing of the two sector systems, connection and disconnection of the forward drive and the Zusatzhemmwerkes, contact for flashlight) controls in the required correct sequence.

Claims (8)

Patent claims: 1. A photographic shutter with two sector systems running independently of one another from a clamping position, one of which is used to open and the other to close the shutter passage opening, and with a control device for successively releasing the two systems to the drain, characterized in that the control device is a Control member (50) comprises which are arranged at a fixed distance from one another control projections (50 a, 50 m, 50 k, 50i "), of which at least one during the process movement of the control member from a starting position, the release of the drain lock of both the opening system and the Locking system causes and the others are used to activate or deactivate further locking devices that can optionally be switched into the locking function sequence. 509 519/257 2. A photographic shutter according to claim 1, characterized in that the one Control projection (50 α) of the control member (50) during its sequence movement, a first locking member (36) is actuated to release the opening system (12 o) and a gear chain (short-term mechanism 34 to 46) moves, which a period of time after its activation a second locking member (34 ') is actuated to release the locking system (12 s), and that the time between the Time at which the gear chain is started and the time at which the locking device is released can be adjusted by the locking system with the aid of an adjusting element (48). 3. A photographic shutter according to claim 2, characterized in that by means of a switching member (72) a lead inhibitor (lead mechanism 54 to 60, 78 a) the control member (50) can be switched on, which, when switched on, the sequence movement of the same until it hits the a control projection (50 a) is delayed on the first locking element (36) and is put out of gear by a further control projection (50 1 "). 4. Photographic shutter according to claim 3, characterized by the switching of the advance inhibitor (advance mechanism 54 to 60, 78 a) in the tensioning movement preventing locking device 76, 76 a), which by an element (32) of the locking system (12 s) ineffective when the clamping position is reached Position can be brought. 5. Photographic shutter according to claim 2, characterized in that means of the adjusting member (48) an additional escapement (long-term movement 54 to 60, 64) the control member (50) can optionally be switched on, which when switched on by one of the control projections (50 m) of the control member (50) is set in motion and the sequence movement of the same is delayed. 6. A photographic shutter according to claim 2 with built-in contact device for flashlight, characterized in that a further control projection (50 k) is assigned to the control member (50) as a contact actuator which, when the contact device (84, 86) is connected to the flashlight circuit, makes contact during the control element sequence causes. 7. Photographic shutter according to claim 6, characterized by such a design of the contact device (84, 86) that it can be brought into the inoperative position during tensioning by the contact actuator {50 k) of the control member (50). 8. A photographic shutter according to claim 2, each having a main drive element which can be locked in the cocked position for the two sector systems, characterized in that the control element is designed as a clamping ring (50) which is equipped with a return spring (52) and can be locked in the cocked starting position by a manual release (88) which, in addition to the control projections (50 a, 50 m, 50 k, 50i "), also has two clamping projections (50 s, 50i ') which, when the clamping ring (50) moves into the starting position, also transfers the two main drive elements (26 o, 26 s) in the clamping position. Considered publications:
German Patent Specifications No. 37590, 43 561;
German interpretative document No. 1116 054;
Patent No. 5395 of the Office for Invention and Patents in the Soviet zone of occupation in Germany. For this purpose 2 sheets of drawings 509 519/257 3.65 © Bundesdruckerei Berlin