DE1807944A1 - Exposure control device for photographic apparatus - Google Patents

Description

PATENT OFFICERS DIfL-ING. CURT WALLACH DIPL-ING. GONTHER KOCH DR. TINO HAIBACH

8 Munich ^ November 1968

OUR MARK: H 688 -

International Polaroid Corporation, Jersey Citv. N ew Jersey. Exposure control device for photographic apparatus

The invention relates to an exposure control device for a photographic camera with a shutter and a frame for holding a multiple flash, preferably in the shape of ™ a flash cube and with means for port switching the flash lamps the arrangement according to exposures made by the shutter.

¹ m

A flash lamp of the arrangement is in each case in a flash lamp circle ready for ignition to take an exposure upon actuation of the shutter.

Depending on the actuation of the shutter and after ignition, one each The flash lamp causes the switching device that the multiple flash another lamp in the flash lamp circuit for ignition turns on during the next recording.

The invention has for its object to provide a photographic apparatus for flash operation, in which a Flash lamp ignited in relation to time to each photographic exposure and automatically one after ignition new flash lamp is transferred to the standby position.

Another object of the invention is to provide a photographic one Camera with an exposure control device, wherein

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a detachable unit with several flash lamps is provided on the camera is and means of maintaining this unit according to the exposures, to provide successive flash lamps for ignition.

Embodiments of the invention are described below with reference to FIG Drawing described. In the drawing show:

Pig. 1 is a partially exploded perspective view an embodiment of the invention,

Fig. 2 is a perspective view of an individual part of the device ^ according to Pig. 1,

fe Pig. 3 is a perspective view of a further component the device shown in Pig.l in a rear view,

Fig. 4a to 4e plan views of certain components of the device according to Fig.l in different working positions,

5 and 6 perspective representations of a preferred embodiment the invention in exploded perspective views,

7 is a schematic representation of a control circuit which can be used in conjunction with the device according to FIGS is. '-

In the following, reference is first made to Pig.l of the drawing. The device shown here has an exposure opening P 10, a shutter 12, control means 14, a drive 1'6> a latch 18, retaining means 20 and triggering means 22. ^:

The device also has a fit 24 into which a multiple flash 25 can be inserted. A ratchet wheel 26 is mounted under the fit, a slide 28 controls the movement of the ratchet wheel, and a drive spring 30 pretensions the ratchet wheel in the direction of rotation. Furthermore, the device has a cover 31 > a base plate 132 and movement transmission means 32, which extend from the latch 18 to the slide. 28 extend '″ and engage with this in order to transmit the movement of the shutter 12' to the slide 28.

909S24 / G973 ORIGINAL INSPECTED

The multiple flash arrangement 25 can, for example, be of the type shown in FIG the type shown. Here is a generally cube-shaped Housing provided in each of the four side surfaces: J54 a flash lamp with a reflector assigned to it wearing. The multiple flash assembly is equipped with a base portion, a contact support ring j56 and a Has socket 38. The contact ring places the terminals 40 of each flashlight to bring them into contact with two terminals that are located within the the rotation causing device are arranged as will be described below. The base has a downward protruding one Center pin 42 and four outwardly projecting lugs 44, which are equiangularly spaced on the outer surface of the center pin are arranged. This socket fits into the fit 24.

The shutter 12 has an opening blade 46 and a closing blade 4b, both of which are rotatably mounted on a hub 50 are to cover or uncover the exposure opening 10. The closing lamella has a support section 52 and a Cover section 54 on. The support section is rotatable on the Hub 50 is supported and lies over the opening lamella 46. The cover section 54 is arranged on the carrier section 52 so that that it lies in the same plane as the opening lamella 46. In the position shown in Fig.l abuts an edge of the cover section 54 to an edge ″ of the lamella 46. An elongated one Portion 56 of carrier 52 forms a light seal along the abutting edges. The closing lamella 48 further includes a surface 58 and a cam 60. the opening lamella 46 has a bend 47

The control means 14 comprise a cover plate 62 which is pivotably mounted on the hub 50 and can be moved between a first and a second position. The cover plate 62 forms a cam 64, an opening 66 and a carrier stop 60. The cam 64 lies radially inside the cam 60 of FIG

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Closing blade 48 for a purpose which will be described below. The stop is in the path of movement of the opening lamella on and since the opening lamella and closing lamella meet, the counterclockwise movement of both lamellae is caused by this stop limited. A spring 70 permanently biases the cover plate clockwise to the first position. When the cover plate moves into position, the carrier stop acts 68 on the opening lamella 46 and presses this and the closing lamella 4b counterclockwise into their cover position ' or release order. The restraint means 20 are in the vicinity the release position of the closing blade 48 arranged to limit the clockwise rotation. Since the spring 70 is constantly fe biases the control means clockwise, the closing lamella 48 pressed permanently and tightly against the retaining means for reasons which will be described below.

The drive 16 has drive springs 72 and 74 for the opening lamella 46 and the closing lamella 48, respectively. The spring 74 is open. hub 50 and has a portion 76 which extends outwardly on hub 50 and acts on closing blade 48 at 78 and the other end portion 80 projects outwardly from the hub and engages control means 14 at 82. In the same way, the spring 72 is on the hub. and has end portions 84 and 86 which protrude outwardly from the hub and engage the opening lamella 46 at w 88 and the control means 14 at 82. The drive spring 72 is biased so that it seeks to rotate the opening blade counterclockwise about the hub, while at the same time the cover plate is biased clockwise, whereby the opening blade is biased against the stop 68 of the cover plate. In the same way, the spring? '4 is pretensioned so that it seeks to rotate the closing lamella counterclockwise around the hub and biases the cover plate in a clockwise direction such that the closing lamella is biased against the opening lamella. All three links, i.e. the two slats and the cover plate, can be used as a unit.

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are moved to each other without the condition of the drive springs 72 and 74 to influence. The condition of the drive springs becomes only affected if there is a relative movement between these members. The preload of the springs serves to keep the individual To keep limbs in their correct relative positions when the 'apparatus is at rest.

The latch 18, which the opening lamella 46 in the covering position holds against the bias of the spring 72, has an arm 90 ' which is pivotably mounted on a pin 92. A protrusion 94 extends from the end of the arm 90 to releasably engage the bend 47 of the aperture blade 46 and the spring 96 and to bias arm 90 in a counterclockwise direction practice.

The restraint means 20 can, for example, be provided by an electrical control circuit 98, an electromagnetic holding device 97 and switches S, and S ^ are formed.

An example of an electronic timer circuit that can be found in conjunction can be used with the invention and the restraint means 20 is disclosed in US Pat. No. 3,205,02. This circuit has a photoresistor, e.g. a cadmium sulfide cell that is exposed to light and a resistance value supplies which functionally depends on the intensity of the admission hel- ^ is dependent. The timer function of the circuit responds to the resistance value of the photoresistor.

A flashlight circuit 99 can be assigned to the electronic control circuit. This comprises two lightning contacts 172, a synchronous contact S- ,, which, in the closed position, applies voltage to the flashlight _{circuit 99 to ignite a flashlamp, while a safety switch S 2} ^ opens the circuit 99, while the contact S- is closed. The contact S- is biased into the open position and is closed by the releasing movement of the opening lamella 46. The switch contact Sj. is in the open

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position biased and is closed by the closing lamella 48 when the closing lamella in its price division is located. When the closing lamella begins to move into the covering position, the contact S ^ opens as a result of it Preload.

mechanical

The el.ektroBüagösaHiSiJiigc holding device consists of an electromagnet with U-shaped core 100 and electrically excitable coil 102, which is wrapped around one leg of the core. the Coil 102 is in the circuit 98. The free ends 104 of the core lie in one plane and act with a magnetisierb Bar anchor ΙΟβ together, which is attached to the closing lamella 48 is. The core of the electromagnet is so that the armature ΙΟβ the closing lamella comes to rest on its legs when the closing lamella is in the open position. Core and Anchors are designed so that the surface 108 of the armature in this position the free ends 104 of the U-shaped Touches the core, so that a closed magnetic circuit is formed. When the electromagnet is energized, one becomes sufficient large magnetomotive force exerted on the magnetic circuit to hold the armature to the core and accordingly the closing blade to keep in the release position.

The switch S ₁ is normally open and is closed by the initial actuation of the trigger 22 for the purpose of energizing the time delay circuit. The switch Sp has contacts 110, 112, the contact 110 being biased so that it is not normally in contact with the contact 112 stands, but is brought into contact with this contact piece 112 when the opening lamella 46 is in its initial position. The switch Sg acts in conjunction with the timer stage 98 and the coil 102 arranged therein to set the exposure time.

The trigger 22 has a shaft II4, a handle button II6 and a spring II8. The shaft 114 is displaceable back and forth

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borrowed opposite the hub 50 stored. One end 120 of the shaft cooperates with the bend 122 of the control means 14 to cause this control means to rotate in the counterclockwise direction transmitted when the trigger is moved down. the Spring 118 biases handle button Ίΐβ and shaft 114 in opposite directions axially with respect to the shaft. The spring 118 is considerably weaker than the spring 70, see above that when the button II6 is depressed, it is moved downward by the distance d before this movement acts on the shaft is transmitted. The button has a cam 117 to. Actuation of the switch S., on.

The mount 24 has an element 124 and a component 126. The element 124 has a square 128 which is used for insertion in the ratchet wheel 26 and a shaft section 130 is also provided which protrudes from this square in order to mount the element 124 in the support plate 132 in a rotatable manner. The element 124 also has four equally spaced extensions 134 which form a central opening I36. Two opposite extensions carry shoulders 1381 which cooperate with a slide bearing l40 of the cover 3I. The remaining pair of opposing appendages have shoulders 142. The shoulders 142 are larger than the shoulders I38 and they act as retaining means for the spring 30 and cooperate with the bearing surface l40. The component 126 consists of a t

flat plate-like portion 144 from which four fingers 146 are punched out and bent in such a way that they come to lie between the extensions 134. An opening not shown with a shape complementary to the square 12o lies in the Center of section 144 so that component 126 is mounted on the square between ratchet wheel 26 and element 124, can. This makes it possible to detach the multiple flash 25 to be retained in the socket after the pin 42 is in the central opening 136 is inserted in such a way that the lugs 44 lie between the extensions 134. When the tenon is inserted, run the spring fingers 146 outwardly over the lugs 44 and effect

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together with these a bracket. The multiple flash 25 can be removed simply by removing it from the fit is pulled out with such great force that the peder fingers 146 slide over the lugs 44 again.

As mentioned, the ratchet wheel 26 is mounted on the square 128 of the element 124. Four teeth 148 are radially from that Wheel forward and act with the slide 28 and a protrusion 150 together, which protrudes from a tooth and cooperates with a circular arc-shaped slot 152 of the carrier plate 132. Of the Slide 28 has a first anchor 154 and a second anchor 156 and it can be moved back and forth in the carrier plate Ij52 stored. The movement of the slide 28 enables a controlled rotation of the ratchet wheel 26 and accordingly the fit 24. A port set 158 of the slide has an opening I60, in which the movement transmission member 32 engages. The opening 160 is elongated to allow a predetermined movement of the motion transmitting member 32 to allow without taking the slide. The slide is mounted under the support plate 1J2 and anchors 154 and I56 extend through openings 162 or l64 of the base to engage the ratchet wheel. A pin 166 projects from the armature 156.

The drive spring 30 consists of a helical spring which is wound around a core which is supported by the curved surface ^ chen the port sets 1 ^ 4 of the element 124 is formed. A The end of the spring is permanently attached to a port set I68 and the the other end is attached to the pin I66 of the slide 28. The spring is wound so that it turns the rotating parts counterclockwise pretensioned and seeks to move the slide upwards.

The cover 31 has the slide bearing l40, pin I70, terminals 172 and a channel I74. The terminals 172 cooperate with the clamps 40 to bring the flash lamp aimed at the scene to be photographed into the flash circuit 99 to switch on. Channel 17'4 allows unhindered movement

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of terminals 4O when the multiple flash is rotated. the Trunnions I70 work with trunnion bearings I76 of the carrier plate 132 -together to fix the cover to the base plate in such a way that the fit 24, the drive spring 30 and the ratchet wheel 26 are stored between these. The shaft 13O stands by one circular arc-shaped slot 178 in the base plate. The bearing shoulders I38 and 142 are through the thrust bearing l40 held.

The circular arc-shaped slot I52 in the carrier plate 132 has an interrupted sector that defines the ends I80 and I82, to control the rotation of the multiple flash, as further is described below.

The motion transmission device 32 extends from the Latch 18 as an integral part of the same and has a pinger 184 which passes through the opening J60 of the slide stands through. Further has the motion transmission device 32 a stop arm Ib6. The spring 96 biases the motion transmission device 32 and the latch Ib counterclockwise around the pivot 92 so that the pinger 184 the Lifts the slide up. The pinger is usually on the top End 188 of slot I60 at. The motion transmission device As described in detail below, 32 is over a first and a second position can be rotated clockwise. at the first increase in the clockwise rotation, the pinger Ib4 runs down into the slot ΙβΟ by a predetermined amount, until it rests against the lower limit of the slot. The downward movement is limited so that the pinger does not advance that far is that it transmits a movement to the slide. The stop arm 1Ö6 is in such a way from the movement transmission element before that the downward movement of the finger 184 is positively limited until other movements have taken place. When the pinger Ib4 moves further down to the second position is, he leads the slide 28 against the bias of the Boeder 30 down.

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The events that occurred as a result of the depression of the Handle button 116 and shaft 114 for initiating exposure occur are described below.

In the following, reference is made to FIGS. 1 and 4a. In these Figures the closure is shown in the rest position. Opening lamella 46 and closing lamella 48 butt against each other, so that a clockwise movement of the opening lamella causes a similar movement of the closing lamella. The spring 70 continuously biases the control means 14 for clockwise rotation. The carrier stop 68 extends from the Control means in contact with the surface 192 of the opening lamella such that the bias of the control means is clockwise also preloads the opening and closing slats for the same movement. The core 100 of the electromagnet is such arranged that its surfaces 104 are contacted by the surface 108 of the armature of the lamella 46 to prevent the movement of the To limit slats 46, 48 and 62 clockwise so that the slats 46 and 62 are located in their covering position and the closing lamella 48 is in the release position. As the spring 70 continuously moves the slats in a clockwise direction biased, the armature 106 is continuously in density. Brought into contact with the surface 104 of the core. A little Tolerance gap 194 is through the opening lamella and the Notch 18 is formed.

The flash unit is shown in the relaxed position, wherein the socket 24 is arranged so that each of the four end faces 34 of the multiple flash 25 at an angle of is located about 40 ° relative to the plane of the scene to be photographed, i.e. relative to a plane that is perpendicular to the optical axis 196 is. In this condition the Surface 19b of protrusion 150 against end portion 180 of slot 152 to prevent further rotation of the assembly and to position ratchet teeth 148 so that the two A ^ er 154 and I56 of the slide 28 the movement

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of teeth up and down do not interfere. In the unwound Position is the 40 ° orientation of the multiple flash 25 daäu to indicate that a new multiple flash is required.

To initiate a recording, a multiple flash lamp 25 is inserted into the socket. The multiple flash is then rotated clockwise to tension the drive spring JO. When the rotation occurs, the projection 150 rides into the arcuate slot 152 until its surface 200 abuts against the end 182 of the slot. The ends of the slot are arranged so that the multiple flash moves through an angular rotation of approximately 320 °. The shape of the armatures 154 and 156 and the teeth 168 of the ratchet wheel are such that the clockwise rotation of the socket and the ratchet wheel can take place freely. When the multiple flash is released, the drive spring 30 rotates the socket 24 and the ratchet wheel 26 through an angle of 10 ° in the counterclockwise direction into the position shown in FIG is releasably held against rotation under the influence of the drive spring by the first armature 154. The 10 ° over-rotation is provided to ensure that a tooth 14b is engaged by an armature 154. In this position there are terminals of a flash lamp, which is directed towards the scene, in contact with terminals I72 of the flash unit. This one flash lamp is now in the flash circuit, which is ignited in relation to the timing of the shutter actuation. (

Reference is again made to Pig. 1 below. The handle button 120 is pressed to initiate exposure. The initial downward movement of the button by the distance d causes the switch actuating cam 117 to close _{the contacts of the switch S 1.} By closing the switch S ₁ , the timer circuit 9b is energized together with the coil 102 of the electromagnetic holding device 97 to prevent a movement of the closing lamella 4ö as a result of the bias of the drive

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spring to avoid what would otherwise be the case with a previous movement of the lamella 46. The excitation of the coil causes a magnetic induction in the magnetic circuit of the core 36 and the armature JO , which is sufficiently great to exert a force on the armature that pulls the closing lamella in the initial position against the bias of the drive spring regardless of the movement of the opening lamella 46 holds.

By depressing the button, a sliding movement of the shaft 114 is initiated. The end 120 of the shaft comes with the Bend 122 of the control means 14 engages and rotates the control means counterclockwise from the first position to the ™ second position against the bias of the spring 70. By the Movement of the control means disengages the carrier stop 68 from the surface I92 of the opening lamella. The opening slat moves slightly within the covering position and closes the gap 194 and is releasable in this by the latch l8 Cover position held.

A counterclockwise movement of the control means 14 pulls while the movement of the opening and closing lamella is fixed is, the drive springs 72 and 74 on to a predetermined potential To store energy in the springs in addition to the energy that was already inherent in the springs as a result of the preload. · fc The control means 14 finally reach a position in which the

Cam surface 64 on projection 94 of latch 18 introduces works. A further increase in movement üjfcue the control means in their second position, in which they are in the release position with respect to the exposure opening. The mentioned further increase in Movement causes cam surface 64 to retract protrusion 94 moved clockwise away from the opening blade 46 to the Release the opening slat for movement. The projection 74 runs further on the raised surface 65 of the cam 64, thereby preventing reverse movement of the pawl under the influence the bias spring 96. The movement of the pawl causes a first

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Clockwise movement of the pinger 184 and the stop 186. The Pinger is in the slot l6O of the slide 28 down in transferred to a position in which its end is near the lower end 190 of the slot. The stop 186 engages with the surface 58 of the closing blade 48 to the movement of the To limit pingers and to prevent this position from being exceeded, which could lead to premature movement of the carriage 28.

The opening lamella moves into its open position under the Influence of the drive spring 72 to initiate the exposure. While the movement, the opening slat opens the switch Sp, to the Activate circuit 98 and initiate the timer action. | In addition, the switch S ~ is closed in order to access the recording scene directed flash lamp in relation to the timing of the initiation of the exposure by the release movement of the opening lamella to ignite. -

The timing of the processes that are _{initiated by opening the switch S 2} is completed after a predetermined time interval has elapsed after the initiation according to the mode of operation of the timer circuit 98. Upon completion of the time interval, the coil 102 is de-energized. The spring 74, which acts on the closing lamella 4b, then transfers this closing lamella into the covering position, whereby the exposure is ended. The initial movement of the closing lamella enables an opening ( of Sh according to the bias, so that the circuit 99 is opened. In this covering position, the closing lamella strikes the opening lamella and is biased into direct continuous contact with it by a spring 74.

During the movement of the closing lamella after the release position, the surface 58 of the closing lamella moves from the stop 186 away, one more rotation of the pawl 18 and the motion transmission device 32 allow. The cam 60 protrudes radially from the closing lamella and also radially over the protruding one Surface 56. During the closing movement of the closing

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lamella of the cam 60 against the projection 94 of the pawl 18 to impress this a second clockwise movement and at the same time continue to rotate the finger 184. The pawl and pinger act as actuators for the switching mechanism at this point. This second movement of the pinger moves the slider 28 downward against the biasing action of the operator 30. The cam surface 30 rides under the protrusion 94 to allow it to contact the raised surface 65 and allow the pinger 184 to return to the position required he took after performing the first movement step. The spring 30 returns the slide to the upper position after the pinger 184 has returned to said position. w In this way a quick movement of the slide up and down is obtained.

The downward movement of the slide disables the first armature 154 Engagement with the tooth 148 of the ratchet wheel, with which it is engaged according to Pig.4b, so that the wheel "is under the influence Turn the spring 30 further into the position shown in Pig. 4c can. The second anchor 156 is in the position according to Pig. 4c such that another tooth 148 of the ratchet wheel engages to. limit the rotation of the wheel. In the illustrated Embodiment, the arrangement is made so that the anchor and the teeth are dimensioned and arranged so that each a 45 ° -Drefe hung is effected.

The upward movement of the slide causes the armature 156 to be lifted out of the tooth with which it was in engagement according to FIG. 4c and This enables the ratchet wheel to be turned further into the position according to Pig.4d. The teeth of the ratchet wheel are arranged so that the two turning steps, which are effected by the downward and upward movement of the slide, together make a 90 -turn represent. A 90 ° turn is suitable to point another of the flash lamps at the scene.

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Each of the flash bulbs is so one at a time on the shooting scene directed and ignited according to the operation of the breech.

When the last (fourth) flash lamp is directed at the scene / is the projection 150 of the ratchet wheel 26 along the circular arc slot 152 so that its surface 198 is offset at an angle from the end IbO of the circular arc slot by about 40 °, as shown in Pig.4e emerges. According to the operation of the shutter, a downward movement of the slide 28 is carried out, as mentioned above, so that the teeth of the ratchet wheel, which are held in Fig. 4e by the first armature 154, are released so that they are under the influence of the drive spring J> 0 can move. The second armature 156 moves downward to a position in which it engages another tooth 148 of the ratchet wheel, as mentioned above, but just before the second armature engages one of the teeth. The surface 198 of the projection 150 abuts against the end 180 of the circular arc slot 152 to stop the rotation of the wheel 26 and accordingly also stop the rotation of the flour flash. Now the flashlight device is returned to the position according to Fig.l and 4a, the teeth of the ratchet wheel are arranged so that they are not detected by either the first or the second armature and the faces of the multiple flashes are all at an angle of approximately 40 ° relative to the plane of the scene to be photographed. This orientation aids i orientation of the flash cube is used to indicate that all lamps of this multi-flash are used up and that a new flashcubes is needed.

After the exposure is complete and the flash cube has been rotated, the lib button is released. The spring 118 relatively lifts the button II6 to shaft 114; the spring? 0 rotates the control means 14 clockwise to the first position and the bend 122 of the control means lifts shaft 120 up to the raised position. The upward movement of the button 11b causes the switch to open

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S ₁ and thus the circuit 98 is opened. During the clockwise rotation of the control means, the carrier stop 68 interacts with the surface 192 of the opening lamella 46 in order to transfer it clockwise to the covering position and the contact between the opening lamella and closing lamella 48 causes a rotation of the closing lamella after its release position, with the switch Su closed will. A return of the opening lamella to the covering position causes the switch Sp to close and the switch S to open.

The spring 70 xxrfcfc has a continuous clockwise biasing force on the control. The control element in turn causes a force on the opening and closing lamellae is exercised in order to continuously move the anchor 106 into tight calming · tion with the core 100. During the respective clockwise movements the control means 14, the opening lamella 46 and the closing lamella 48 find no relative movement between opening and closing lamella as well as control element instead. The spring 70 does not need to exert a restoring force which is sufficient to overcome the forces of springs 72 and 74, rather it need only be strong enough to exert the force required to keep armature 106 in close contact with core 100.

During the retraction movement of the opening and closing slats and the control means moves protrusion 94 from the surface 65 away over the cam 60 and onto the edge 210 of the Closing lamella. The projection 94 runs along the edge 210, until the protruding section 47 of the opening lamella passes underneath. The spring 96 then moves the arm 90 counterclockwise such that the projection 94 on the portion 47 of the Lamella 46 acts. In this way, the device is returned to the initial rest position. When the lock returns in the rest position and movement of the projection 94 in contact with the section 47, the finger 184 can be in the upper section I88 of the slot I60 return, as can be seen from Fig.l is.

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Now the used lightning cube is removed and a new one Lightning cube is inserted. Then the flash unit is again drawn up in order to be able to carry out further flash exposures.

Reference is now made to "Pig.5- * 6 and 7 of the drawing / which illustrate in detail a preferred embodiment of the invention.

This embodiment shows a closure and means to to store and ignite several photoflash bulbs one after the other. The flash unit can be used in conjunction with a Multiple flash lamp arrangement of the type shown in FIG

the reference numeral 25 is identified. "

The shutter has an objective 308, a base plate 310 which defines an exposure opening, a shutter blade 312, shutter control means 314, drive means 316, a pawl 318, retaining means 320 and triggering means 322. The flash lamp storage and ignition device has a rotatable socket 324 which can detachably receive a flash cube 25. A ratchet wheel is rotatably mounted in the vicinity of the socket. Further, a carriage 328 is provided to control the movement of the switching wheel and to control the movement of the closure i 312 to transmit a cover plate 331 and a base plate 432 and motion transmitting members 332 projecting from the pawl 318 in contact with the carriage 328 on the slider 328 .

The photographic shutter is described below.

The shutter 312 has an opening blade 346 and a closing blade 348, which can be pivoted about a pin 350 and cover or release the exposure aperture. The pin 350 is fixed in the base plate 310 / Die Sohließlamel-Ie includes a light seal 352 and a plate portion 354.

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The plate section is pivotably mounted on the pin 350 and a light seal is provided that overlaps the aperture blade 346. The lamellar section 354 lies in one plane with the lamella 346. According to Pig.5, an edge of the lamella section abuts 354 against an edge of the lamella 346. The fin 348 also has a surface 358 and has an elongated one Cam 36O. The lamella 346 has a bend 347 which cooperates with the pawl 318. The slat control means 314 have a cover plate 362 that is pivotable the pin 350 is mounted and located between a first and can rotate to a second position. The cover plate has a cam 364, an opening 366 and carries a stop 368. The cam 364 is radially inward of the cam relative to pin 350 360 arranged on the lamella 348. The purpose of these cams will be clear later. The stop / In the path of movement of the opening slat and as a result of this arrangement of the opening and closing lamella, the movement of both the opening lamella and the Closing lamella limited in the counterclockwise direction. The spring 370 constantly pretensions the cover plate in a clockwise direction into the first position. When the cover plate is in the first position moves, the stop 368 acts on the opening lamella 3 ^ 6 and pushes the opening blade and the closing blade 348 clockwise into the covering position and the release position, respectively. Restraint means 320 are provided in the vicinity of the release position of the closing blade 348 in order to prevent the movement in the clockwise direction to limit. Since the spring 370 continuously controls the means is biased clockwise, plate 348 is steady and pressed tightly against the retaining means for reasons which will be described below.

Drive means 316 are provided, the drive springs 372 and 374 for the lamellas 346 and 348, respectively. A spring 384 is wound axially to the pin 350 and has an end portion 376 which protrudes radially from the pin 350 and on the Closing lamella 348 acts at 378. The other end of 380 of these The spring extends radially to the pin and acts on the

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Control means 314 at 382 a. In the same way is the spring 372 wound axially to the pin 350 and has end portions 384 and 386, respectively, protruding radially from the pin and onto the opening lamella 346 at 388 and the control means 314, respectively act at 382. The drive spring 372 is biased to the opening blade counterclockwise to bias the pin while the cover plate biases clockwise will. So the opening lamella against the stop 368 of the Cover plate pre-tensioned. The spring 374 is biased to the closing blade counterclockwise to bias the pin, while at the same time the cover plate clockwise is biased. All three slats can be moved together as a unit without the tensioning condition of the springs 362 and 374 to change. This tension condition of the springs becomes I. only influenced if there is a relative movement between the slats. The preload condition of the springs is used to to keep these elements in their proper relative position when the apparatus is at rest.

The pawl 3I8 releasably holds the opening lamella 346 in the covering position against the bias of the spring 372 and that over the movement transmission device 332 and in a position in which the bend 347 of the opening lamella 346 is detachably detected will. The spring 396 exerts a counterclockwise bias on the motion transmission device 332.

The restraint means 320 consist of an electromagnetic one Holding device 397, which is on the electrical circuit 398 responds and controls the exposure time according to the exposure brightness.

The magnetic holding device has an electromagnet with a U-shaped core 400 and an electrically excitable Winding 402 wrapped around one leg of the core. This coil 402 is included in circuit 398. the free ends 4o4 of the core are in the same plane and act -

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with a magnetizable armature 4o6, which is attached to the closing lamella 348. The core of the electromagnet is in the vicinity of the opening release position of the closing lamella in contact with the armature when the closing lamella is in the covering position. Core and anchor are arranged so that the surface. 408 of the armature contacts the surfaces 404 of the U-shaped magnetic core to form a closed magnetic circuit. When the coil 402 of the electromagnet is excited, a sufficiently large magnetomotive force is exerted on the magnetic circuit to press the armature HSbi against the core and thus to keep the closing lamella in the release position.

A circuit 598 suitable for exposure control shows Pig.f. This circuit consists of a timer stage 220 and a trigger stage 222.

The timer stage 220 is between the terminals 228 and 2050 of the circuit 398 and forms an integration circuit, the input terminal of which is at 228 and the output terminal of which is between resistor 226 and photoresistor 224 at connection 234. The connection 234 is connected to the base electrode of the transistor Q _{1 of} the trigger stage via a fixed impedance 238.

The timer stage has a light-sensitive element 224, for example a cadmium sulfide cell or the like., Which is exposed to the light of the recording scene and which is characterized by a resistance which is dependent on the brightness of the recording. A capacitor C ₁ and a resistor element 226 are also provided. The resistance element 226 is a compensation element for flash photography. The element 226 is in the stage 220 if a flash exposure is to be carried out and the element is short-circuited via a line 229 which runs from the terminal 234 parallel to the resistor 226. The resistance element is

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men shorted. The stage 220 also includes a compensation Wider stand 227 which is parallel to the element 224 when flash photography is performed, and the limit on the duration of the exposure interval in flash photography to a predetermined maximum value ^v. Element 224 normally controls the duration of the exposure interval. However, if the light reflected from the shooting scene is small, an undesirably long exposure interval could be created. If so, then the resistance of element 224 is greater than the resistance of resistor 227 so that resistor 227 takes control. The timer stage also has a switch S ₁ - in order to be able to switch the system between outdoor shots and flash shots. The switch is a single pole changeover switch. The arm 259 of the switch S, - is fixed to the terminal 238 and can either be brought into contact with the terminal 22J transverse of the terminal 241. If the arm 259 comes into contact with the terminal 223, the circuit is interrupted via the resistor 227 and the resistor 226 is short-circuited via the line 229. When the arm 239 is connected to the terminal 241, the circuit is closed via the resistor 227 and the line 229 is open, so that the resistor 226 in the circuit 220 is switched on.

The stage 220 then forms an integration stage that is used in flash mode and is functional when shooting outdoors. When shooting outdoors, both resistors 226 and 227 are excluded and at Flash mode, both resistors are in the circuit.

The trigger stage 222 can, for example, be a transistorized two-stage Schmitt trigger circuit be based on the output voltage of the

Timer stage 220 responds, A circuit of this type is detailed in connection with the aforementioned control circuit in US Pat. No. 3,205,802. The trigger stage 222 has an input that consists of a normally non-conductive Stage consists and comprises a transistor Q ^ and the The output has a normally conductive step with a transistor

909824/0973

both stages of the trigger circuit are called "normally non-conductive "or" normally conductive ". It is clear, however, that this characterization is only accurate is when a voltage is applied to terminals 228 and 230.

A voltage source 240 in the form of a battery with the potential E _Q is connected between the terminal 228 and the K terminal 230 via a normally open contact S ₁ . The normally open contact S i is closed to apply a voltage to the terminals when the trigger 322 is operated to initiate exposure through the shutter.

The trigger 322 has a handle button, the hollow portion 415 of which encloses a spring 418, a shaft 414 and a button 416. The shaft 414 is reciprocable relative to the pin 350. The end 420 of the shaft acts on a bend 422 of the control means 314 for the shutter 312 by rotating the control means counterclockwise as the trigger is moved downward. The initial movement of the trigger 332 causes the switch S _{2 to} close. Spring 418 axially biases button 416 and shaft 414 in opposite directions. The spring 418 is much weaker than the spring 370 so that when button 416 is depressed, the button moves downward the distance d before this movement is transmitted to the shaft. The switch S ₁ has a fixed terminal 280 and a connecting spring 281 which is pretensioned against this terminal 280. A Sehaltbetätigungshebel 2δ3 is mounted on the Teile.284 and 285 of the carrier 310 so that the portion 286 is applied to the terminal 281, to move it against the bias of the clip 280 off, when the ^A rm 287 of the lever 283 upwards is moved. The bias of the contact spring 281 seeks to bias the arm 287 downward. The arm 287 rests on an extension 288 of the button 416 so that the upward bias of the button lifts the arm 287 and _{holds the switch S 1} open until the button is depressed. At the

9 09 824/0973

Depressing button 416 moves port set 288 away from arm 287 and switch S ₁ can close. In this device, the switch S, is closed in accordance with the initial movement of the trigger 22 and it then moves out of the position in which the switch is manipulated until the button 416 is released. This makes the terminals of the switch S independent of the trigger 322 when they are in contact and thereby eliminates any tendency for the contacts to rub and slide relative to one another.

The first shutter blade is movable from its initial cover position to a release position to initiate the exposure and the second blade is movable from the initial release position to a cover position to end the exposure. The second lamella is releasably held in the release position after the first lamella has been moved into the release position by energizing an electromagnetic device. The circuit 398 is set up in such a way that it releases the current flow through the electromagnet for the purpose of releasing the second lamella and running it into the closed position after a predetermined time interval which follows the releasing movement of the first lamella. This mode of operation is initiated _{by actuating switch S 2.}

The switch S ₂ is mounted in the vicinity of the opening lamella 346 and has poles ² HO and 412, wherein the pole 410 can be brought into and out of contact with the pole 412 according to the position of the opening lamella. The switch S ₂ is activated by the switch actuation means 294 which includes the arm 289 which is rotatably supported about a pin 350 in the vicinity of the base plate 3IO. A spring 292 creates a counterclockwise bias on the arm 289. The arm 289 has projections 290 and 29I. These projections lie on opposite sides of the pole 40 such that when the arm 289 rotates counterclockwise according to this bias

909824/0973

can rotate, the protrusion 291 moves the pole 410 away from the pole 412. When the arm 289 is moved against its bias, the projection 290 engages the pole 410 and brings it into contact with the pole 412. The arm 289 is movable against the bias of the spring 290 about the arm 289 in a relative clockwise position to hold, the switch S _{2 is} closed and the movement of the arm 289 in the counterclockwise direction is only possible if a movement of the opening lamella 346 has taken place in the counterclockwise direction. The initial opening movement of the opening lamella enables the arm 289 to be moved counterclockwise such that the projection 291 brings the pole 410 out of contact with the pole 412.

It can be seen that the switch S ₂ is not affected by any movement of the opening lamella which can occur before it is released. In this way, there is no frictional and sliding contact between the poles of the switch Sp before the opening blade is released because there is little premature movement of the opening blade.

The operation of the control circuit 598 will now be briefly described. A detailed description can be found in US Pat. No. 3,205,802. Arm 239 of switch S ₅ is in contact with terminal 223 in such a way that the circuit is opened via resistor 227 and resistor 226 is short-circuited via line 229 *

When the switch S, is closed and before the switch Sp is opened according to the movement of the lamella 346, when it moves from its covering position to the release position, a ground potential is applied to the terminal 234 and the coil 402 is reached around the closing lamella 348 in their release position. When the switch S _{2 is} opened, a voltage occurs at the output terminal 234 which changes from an initial value, e.g. of ground potential, to a predetermined value in a period of time which depends on the value of the capacitor C ₁ and the resistance

909824/0973

value of the photoresistor 424 depends. When the potential at the terminal 254 has reached the predetermined value, the

■ normally non-conductive input stage biased and changes to the conductivity state, while the normal

_v, conductive stage in the Hiohtleitungszustand _s is switched. When the output stage is turned off, the coil 402 of the electromagnet is energized and releases the shutter to terminate the exposure.

If the ambient brightness drops below a predetermined value, at which the exposure time becomes greater than about 125 milliseconds, it becomes difficult to keep the camera steady enough to hold in hand to get a clear picture. In this case, flash lighting must be performed. For this purpose, the flash circuit 99 has a flash ignition switch S, and means that carry the flashlamp 242 and Food. The flash lamp 242 is connected to the battery 240. The switch S- is biased in the opening direction and is located in the path of movement of the plate 362 and it is caused by the final movement the cover plate closed. In relation to the time scale, the closing movement of the switch S occurs shortly after the opening lamella ^ 46 is released, approximately at the same time as it is reached the release position through the opening lamella.

If you want to work with flashlight, the circuit works ( in the same way, with the only difference that resistor 526 is switched on, which is the trigger generation time reduced and accordingly also the exposure time. The resistor 227 lying parallel to the photoresistor 224 is used for Limitation of the duration of the exposure time to a predetermined fixed value and to conditions in which only a relatively small amount Amount of light reflected from the shooting scene onto the photoresistor will. Under other conditions it has no influence. The function of this resistor 227 is described in detail in the US patent 5526 105 described.

90982Ü / 0973

The flash lamp bearings and ignition means are described below.

The fit 324 has an element 424 and a component 426 on. The element 424 has a square 428 in order to mount the ratchet wheel 326 in a rotationally fixed manner and also has a shaft section 430 of circular cross-section extending forwardly from the square, rotatable about element 424 in FIG of the plate 432 to store. The element also has four in the same angular distance to one another arranged extensions 434 which surround a central opening 436 which through the Square 428 and the shaft 430 passed in the middle of the same is. Two opposing sets of ports with shoulders 438 and bearing surfaces 432 work with sub-bearing surfaces 440 of a circular ring 431 of the component 31 together. The surfaces 443 of the shoulders 438 act as restraint means for the Spring 30 * when fitting 324 together. The component 426 consists of a flat plate 444, one of which is four spring fingers 446 protrude with bends 447 which are bent over and lie between the port sets 434. The opening has a Cross-section corresponding to the square 428 and lies in the middle of the plate-like section 444, so that the component 426 can be mounted on the square between the holding wheel 326 and the element 424. This arrangement makes it possible to Multiple flashes can be releasably held in the socket in the manner described below.

A switch S ₅ is mounted near the side of the base 432 opposite the ratchet wheel 326 and is held in place by an elongated member 449 having an end 451 and an enlarged head 453 and through opening 436 in Engagement with the spring contact 239 of the switch S, - .. runs. Fixed terminals 223 and 241 of the switch Sc are arranged on opposite sides of the elastic pole 239, and the pole 239 is elastically biased into contact with the terminal 223. As a result of this cooperation

./. ■ 909824/0973

the latter spans between component 449 and elastic pole 259 the component 449 against the bends 447 of the fingers 436 in this way suggests that head 453 engages these bends.

To insert a new lightning bolt 25, the central pin 42 is pushed into the opening 436 in such a way that the lugs 44 pass between the port sets 434 and press the bends of the spring fingers 446. When the pin is inserted, the spring fingers 446 pass outwardly and over and are retained by the lugs. Simultaneously with the insertion of the pin 44 into the opening 416, the part 449 is depressed in order to bring the pole 239 of the switch S ^ out of contact with the terminal 223 and in contact with the pole 241. The lightning cube 25 is removed simply by pulling it out of the socket with such a force that the spring fingers 446 run back over the lugs 44 again. Then the pole 239 moves back into its contact position with the terminal 223 and the part 149 rests against the bends 14Τ

As mentioned, the ratchet wheel 326 is fixed on a square 428 of the element 424. So the ratchet is rotatably with connected to member 424 but rotatable relative to the base

432. Four teeth 448 protrude radially from the wheel and cooperate with the slide 328, and a protrusion 450 protrudes from ( a tooth in front of with an arcuate slot 452 to cooperate in the base part 432.

Dfic slider 328 carries a first anchor 454 and a / second s

and
Armature 456 / is mounted to slide back and forth in the base 432. The movement of the slide 328 enables a controlled rotation of the indexing wheel 326 and, accordingly, of the holder 324. An extension 458 of the slide has an opening 460 into which a movement transmission element 332 engages. The opening 460 is slot-shaped and allows a predetermined movement of the movement transmission element relative to the slide 328.

909824/0973

- 26 -

The slider is located below the base 432 and the anchors 454 and 456 protrude through openings 462 and 464 of the base in front of and in engagement with the ratchet wheel. The pin 466 extends upward from the armature 456. The spring 463 acts on the Pin 466 and biases the slide upward.

Drive spring 330 consists of a coil spring wrapped around a core formed by port sets 434 of element 424 and fingers 446. One end of the spring is fixedly attached to one of the extensions at 468. The other end is attached to the post 465 of the base 432. The spring is wound in such a way that the rotatable parts are biased counterclockwise. The cover 331 has a first thrust bearing surface 440, terminals 4 ″ 2 and a channel 4 ″ 4. The terminals 4 ″ 2 cooperate with the terminals HO to switch on the flash lamp directed towards the scene in the flash circuit 99. The Channel H '(H allows the clamps to move freely when the flash unit rotates. Parts 470 on base 432 cooperate with cover 331 to support the latter on the base so that socket 324 engages drive spring 330 and the wheel 326 are supported between them. The shaft 430 protrudes through a circular opening 478 in the base. Bearing shoulders 438 are held by thrust bearings 440.

»An arcuate slot 452 in the base 432 has one broken sector defining slot ends 480 and 482, to control the rotation of the lightning cube, as described below.

The motion transmission device 332 has a finger which protrudes through the opening 460 of the slide, and also a stop 486. The spring 396 biases the part 332 and the pawl 318 thereon in a counterclockwise direction about the pin 392 before, in such a way that the finger 484 moves the slider to χκ * en

4o8 presses. The finger usually acts on the top end

Opening slot 460. The motion transmission device

909824/0973 8AO ORIGINAL

Device 332 is movable in first and second rotary indexing steps, as will be described below. The first clockwise movement moves the pinger a predetermined distance toward the lower end 490 of the opening slot 460. This downward movement is limited in such a way that the pinger is not advanced so far that a movement is transmitted to the slide. The stop 486 protrudes from the movement transmission member in order to act on an edge of the lamella 348 and to positively limit the downward movement of the finger 4b4 until other processes are completed. When the second moving step is impressed on the pingers, the slider 328 is pressed against the action of the spring 463 to "below.

The operation of those shown in Figs. 5 to 7 is shown below Device described.

Assume that the parts are initially at rest with port set 450 at the end of the slot 4oO triggers. The opening lamella 346 and the closing lamella 34 & butt against each other and the spring 3fO constantly tensions the Control means 314 forward in a clockwise direction. The stop 36b is from the control member in engagement with the surface 492 of the opening lamella in such a way that the bias of the control means in a clockwise direction also affects the opening and closing lamellae in the ( preload in the same direction of movement. The core 400 of the electromagnet is so that its pole faces 404 from the surface 40ö of the armature 4θ6 are fully touched to the clockwise rotation of the lamellas 346, 348 and 362 so that that the slats 346 and 362 are in their cover position and the closing slat is in its open position is. Because the spring 3 '/ 0 constantly biases the slats in a clockwise direction the armature 406 is continuously brought into tight contact with the pole faces 4θ4 of the core. There is a small gap between of the opening lamella and the blade 318 formed when the louvers are held in this position by means of a spring 370.

909824/097 3

in
The flash unit is shown in an unspared position with the fitting 324 arranged so that each of the four end faces 34 of the flash cube inserted in the fitting is at an angle of approximately 40% relative to a plane of the scene (i.e., relative to a plane perpendicular to the optical axis 496).

Here, the surface 49o of the projection 450 abuts the end portion 460 of the slot 452 to prevent further rotation of the lightning cube and to locate teeth 448 of the ratchet wheel so that the anchors 454 and 456 of the slide 328 the teeth when going up and down not meet. It should be assumed that no lightning cube is inserted in this rest position. The pole 239 of the switch S ₁ . is therefore in contact with the terminal 223 due to the bias. The circuit is now such that the timer for outdoor shooting is set with the resistor. 226 is short-circuited via the line 229 and the resistor 227 is switched off by the switch position of the switch Sj-. To initiate flash exposure, a flash cube 25 is inserted into the fitting as described above. As a result, the part

449 brings the pole 239 against its bias out of contact with the terminal 223 and a switchover to the terminal 241 causes. Resistors 226 and 227 are then turned into Circuit switched on. Finally, the flash cube is manually rotated clockwise to tension the drive spring 33-0. That Device is fully tensioned when the surface 500 of the protrusion

450 acts on end 482 of slot 452. The anchors 454 -....

and 456 as well as the teeth 448 of the ratchet wheel are designed in this way

one
forms that $$$ # K manual- clockwise rotation of the socket and -

is*
of the ratchet freely possible sxioä. The ends of the circular arc conveyor.

with a shaped slit so that the lightning cube · extends over a · Can move angular rotation of about 320 °. 'If the surface v 500 runs to the end 4b2 of the slot 452 'is none of the ■ End faces of the cube 25 more precisely aligned with the scene. An overrun of about 10 is planned. at

909824/0973

0AO ORIGINAL

the release of the flash cube after rotation by hand, the tension of the drive spring 330 pushes the socket 3 ^ 4 with the ratchet wheel 326 ^{counterclockwise by about 10 C} to absorb this amount of overrun and determine the flash cube so that an area after the scene is directed, one of the teeth 44b then being releasably held by the armature 454 to prevent further rotation of the gear under the influence of the drive spring. When this position is reached, the terminals labeled 40 for the one flash lamp, which is directed towards the recording scene, are brought into electrical contact with terminals 4? "2 of the flash device The flash circuit is switched on and it is ignited as a function of time as the shutter progresses.

These actions, which occur as a result of the downward movement of the button 416 and shaft 414, will result in the following described way an exposure.

The initial downward movement of the button by the distance d causes the boss 2b * 8 of the button 416 to move down and away from the arm 2dy so that the lever 2b'3 can move and thereby close the contacts of the switch S , made possible. By closing the switch S, the timer circuit JSc is energized and thus the coil 402 of the electromagnetic holding device 39i * in order to prevent the closing lamella 34c from moving into the covering position in accordance with the bias of the drive spring. Such a movement would otherwise occur after the opening lamella 346 has expired. The excitation of the coil causes a magnetic induction in the magnetic circuit of core 336 and holder 330, which is sufficiently great to build up a force that holds the armature of the closing lamella in the initial position against the bias of the drive elements, regardless of the movement of the opening lamella 346 .

9 0 9 θ 2 4 / · ") ° ' ^Ί λ

8AD ORIGINAL

If the button is pressed down further, the shaft 4l4 is carried along. Its end 420 acts on the bend 422 of the Control means 314 and rotates the control device counterclockwise from the first position to the second position against the action of the bias of the spring 570.Durch this movement of the control means becomes the stop means 368 brought out of engagement with surface 492 of the aperture lamella. The opening slat moves slightly in the cover position, to close the aforementioned gap and it is releasably held in the covering position by the pawl 1 &.

The movement of the control means 14 in the counterclockwise direction with the opening and closing lamella stopped draws the drive springs 572 and 374 to a predetermined potential energy to store in these springs in addition to the energy that is inherent in them as a result of the preload. The tax means 314 will eventually reach a position in which the cam surface 364 acts on the pawl 318. A further advance of the movement causes the control means in their second Position are transferred, whereby the pawl 318 is caused Release the opening slat and it will turn on the flash ignition switch S ^ closed and the opening lamella is then in the release position. In the second step of movement, cam surface 364 causes pawl 318 to turn clockwise moved away from blade 346 to expose the opening blade. The flash ignition switch S ^ is shortly before the opening lamella expires closed and in a predetermined time dependency on this, so that the light output of the flash lamp begins to rise approximately at the same time as the release position is reached through the opening lamella. The one from the recording scene reflected light then affects the flow of current through element 224 and the charge on capacitor C1. The handle 518 remains on the raised cam surface 364 and thus cannot return to the starting position under the action of the biasing spring 396 return. The movement of the pawl causes a first

909024/0973
8AD ORIGINAL

180794 /! - ^ -

Rotation of the "!"'Ingers WA and stop " ^l k> ü L clockwise. The finger is shifted downward by the inside of the wire braid "4oO do" slide ^ 2u Ln a position Ln which the end Ln near the lower end 490 of the sole :>a> LL. The stop 4υό moves Lm intervention MLT the surface '^ o the SohLießlamelLe could what de premature movement »slider» J2L> lead 3 ¹ Yo during the limited movement of de "fingers" to vermeidejn a zufäLLLges DarüberhLnauslaufen.

The opening lamella moves "I in the release" position under the influence of the actuating spring jf2 in order to control the exposure. At this moment the extension 2'J ^ of the opening "LameLLe" must come out of engagement with the projection 2S) O so that the arm 2c "9Lm can be moved counterclockwise under the direction of the spring 292. Then the projection 29L moves the terminal 410Ln the V / else that the switch is S ₀ opened viLrd, fourm the next S ^ ^ees ^ JsäljDSc is. DLe switching stage M> iüfc is activated and the timer function is initiated.

DLe timer function, which is initiated _{by opening the switch S 0} , is terminated in vorbeschrLebener Welse after a predetermined time interval. After the time interval has elapsed, the coil 402 is de-energized. The spring yf ^l [ _} which acts on the ochLLeßlamelle ~ jho then pushes the closing lamei-Le Ln the cover position, whereby the exposure is ended. La this covering position is the key lamella of the opening lamella and is biased against it by the spring jj '/ Λ.

During the movement of the closing lamella, the cover position moved inwards. I > the surface of the closing lamella of the AiUiChLng 4uü, in order to be able to see a further rotation of the movement. The squatting) u O 'TEHT welter radially from the longitudinal axis auiien de "pins" ■ jO before the cam ji'A the cover plate?. So with the; .Jr; hLLoiobowoguriß the cover plate meets the cam; j (> 0 dLe latch ; ') lt>,

9 0 9 0 2 h I 0 9 7 3

8AO ORIGINAL

to initiate the second movement step of the pingers 4o4 in a clockwise direction. The pawl and the pinger act at this moment as the actuating element for the balance wheel. This second moving step of the finger (iberi'ührfc the slider ί? Λ> downwards against the bias of the piping 4o: i. The stool surface jKo is lengthened in such a way that the latch jHo remains on it, bLn the button 4iö is released and the Slide p2o is therefore kept in the printed position.

The downward movement of the slide causes the first armature 454 to fall off the teeth 448 of the ratchet wheel, with which it cooperates, so that the wheel can rotate under the influence of the Peder ~ ßs> 0 . The ratchet wheel is rotated about 45 to an intermediate position in which another tooth 448 is engaged by the armature 45b.

After the end of the exposure and after this 45-turn of the flash cube, the button 416 is released. The pedal 418 lifts the button 416 relative to the shaft 414. The peder 570 rotates the control means; 514 clockwise into the first position, the bend 422 of the control means lifts the shaft 420 upwards into the raised position. The upward movement of button 416 raises arm 287 to open switch S, thus opening circuit 9 &. The initial clockwise rotation of the control means causes the switch S- to open, and then the stop 368 is brought into engagement with the surface 492 of the opening lamella ^ 46 in order to rotate the opening lamella in the clockwise direction into the covering position, whereby as a result of the interlocking connection between ■ opening lamella and closing lamella 348 a rotation of the closing lamella is effected into the release position. After the opening lamella has moved into its cover partition, its port set 295 pushes arm 289 further until protrusion 290 brings terminal 410 of switch S 'into' contact 'with terminal 412. '^;>;

90982 4/0973 BAD ORIGINAL

18079U

The spring 370 applies a constant biasing pressure in a clockwise direction on the control means 314. Practice these in turn a force on the opening and closing lamellae in order to bring the armature 406 into tight contact with the core 400 at all times.

During the clockwise rotation of the control means JIk, the opening lamella 346 and closing lamella 348 do not perform any relative movement. Accordingly, the spring 370 does not need to exert a restoring force which overcomes the forces of the springs 372 and 374. It need only be so strong that it exerts the force necessary to keep the armature 406 and the core 400 in close contact.

During the backward movement of the opening and closing lamella as well Control means moves the projection 394 from the cam surface 364 away and over the cam 36O onto the edge 510 of the Opening lamella. At this point in time, the motion transmission device 332 counterclockwise under the influence the spring 396 move. This turns the finger 484 on the upper stop 4b8 of the opening slot 460 and the spring 463 can lift the slide 328. An upward movement of the slide displaces armature 456 from the tooth with which it is engaged and the ratchet wheel 326 can turn further turn about 45 °. The two rotary motion steps which ^ through the Downward and upward movement of the slide is effected, producing a 90 ° rotation, so that the next flash lamp is in electrical mode Contact is made with terminals 472.

After the pawl 31b is clear of the cam 360, runs they along the edge 510 of the opening lamella 346 until the bent Part 347 of the opening lamella passes underneath. The feather 396 then pushes part 332 and pawl 318 counterclockwise, until the pawl 31b with the part 347 of the lamella 346 engages got. The apparatus has now returned to the rest position.

909 824/0973

SADORiGJNAL

With each subsequent exposure of the shutter, the ratchet wheel rotates in the manner described above, for successive ones To direct lamps of the flash cube on the scene to be photographed and their terminals in electrical contact contact to bring with the terminals 472. When the last '(fourth) flash lamp is aimed at the scene to be photographed, lies the approach 450 of the ratchet wheel 326 in the circular arc slot 452 so, that the surface 498 at an angle from the end 480 of the Kreisschlitzen.s distanced by about 40 °. ; -

According to a further release of the shutter, there is a downward movement of the slide 328, as mentioned above, causes the teeth

W of the ratchet wheel, which are held by the first armature 454, are released for about 45 rotation, which can take place under the influence of the drive spring 330. The second armature 456 then moves down to a position in which it engages another tooth 448 of the ratchet wheel, as described above. But shortly before the engagement of the second anchor by one of the teeth, the surface 498 of the projection 450 abuts the end 480 of the annular slot 4 ^ 2 in order to stop the rotation of the wheel 326 and thus the lightning cube. The flash unit is now moved into the initial position in which the teeth of the ratchet wheel are arranged so that they are not caught by either the first or the second armature. In this position, the end faces of the “Blitz-” litter are all at an angle of 40 ° with respect to the plane of the scene to be photographed. This orientation is used to indicate that all the lamps on the flash cube have been used up. A new flash cube is now required when a flash exposure is to be carried out. When shooting outdoors, the flash cube 25 should be removed. The part 449 then releases the terminal 239 of the switch S ₅ , so that it can move from the terminal 441 to the terminal 223, so that the timer stage for outdoor shots is now ready for operation.

909824/0 9 7 3

Since the human reaction time when operating the device is much longer than the longest average exposure, which is used under normal snapshot conditions, the contacts of switch S remain closed at least as long as as required by the exposure time.

The expressions used in the description "upwards", "downwards", "Clockwise" and "counterclockwise" and the like refer to the various elements in the drawing.

0 9 8 24/0973

Claims (11)

Patent claims: 1. An exposure control device for photographic apparatus having a holder for a multiple flash lamp having Multiple flash, characterized in that a port switching device is provided which is based on the Shutter release responds and moves the multiple flash (25) in such a way that a further «flash lamp from one predetermined working position is transferred to another position. . 2. exposure control device according to claim 1, R characterized in that means (32) are provided which control the port switching device bring into operative connection with the closure in order to actuate the indexing device according to the closure sequence. 3. Exposure control device according to claims 1 and 2 with a shutter having an opening blade which is movable from a first to a second position in order to initiate the exposure and with a shutter blade which ends the exposure, characterized, that the port switching device on the closing movement of the * Closing lamella (48) responds. 4. Exposure control device according to claims 1 to 3 * characterized in that the port switching device each has a flash lamp of the predetermined operating position advances and another flash lamp in this predetermined operating position, and although according to the shutter movement. 909824/0 9 7 3 i pi ι »mi 5. Exposure control device according to claims 1 to 3, characterized in that the port switching device each has a flash lamp away from the predetermined operating position according to the shutter movement and another flash lamp in the predetermined Position advances according to the movement of the shutter from the end position to the starting position. 6. Exposure control device according to claims 1 to 5 * characterized in that the holding device has a port switching wheel (26), which moves the flash cube (25) and successively the flash lamps in the predetermined working position transferred that a synchronization switch (S ^) in time Depending on the release of the opening lamella (46) is actuated to close an electrical circuit, in which the flashlight is in the working position, and that a holding actuator in the path of movement of the closing lamella (48) stands and is operated according to the movement of the closing blade. 7. Exposure control device according to claim 4, characterized in that that the port switching wheel the lightning cube (25) according to the movement the closing lamella (48) from the starting position to the end position emotional. 8. Exposure control device according to claims 1 to 7> characterized in that means are provided to open and close lamella (46 and 4b) can be traced back to their initial divisions after the exposure is finished, the switching device activates a lamp from the predetermined position according to the movement of the Closing lamella from the initial position to the final position moves and another lamp in this predetermined position 909824/0973 moved according to the return movement of the closing lamella (48) from the initial position to the end position. 9 exposure control device according to claims 1 to 8, characterized in that a socket (24) is provided which holds the lightning cube (25) detachably receives that the fit is rotatably mounted and that the indexing device for the version following Components includes: a) a rotatably mounted ratchet wheel (26), b) means (50) to preload the ratchet wheel in the direction of rotation, ^ c) Anchors (154,156), which according to the breech cover movement of the closure are movable and a controlled rotary movement of the peeling wheel under the influence of the pretensioning means and rotate the XS socket. 10. Exposure control device according to claims 1 to 9, characterized in that that the anchors (154,156) are movable to and fro and means (28) incorporated into the ratchet pretensioner intervene that the armature are movable in a direction according to the closing movement of the shutter and that the ratchet pretensioner moves the armatures in a direction opposite to said first direction, ™ pretensioned. 11. Exposure control device according to claims 1 to 10, characterized in that that the armature are movable back and forth and that the means for actuating the indexing device, the armature in move in one direction and that means are provided to connect the armatures and the ratchet pretensioner, and in that the ratchet biasing device biases the armatures in a movement opposite to said direction is. 90982 4/0973 Lee rs e i te - - "if": VT.