US3785264A - Swinging-sector camera shutter with improved warning indicator - Google Patents

Swinging-sector camera shutter with improved warning indicator Download PDF

Info

Publication number
US3785264A
US3785264A US00346576A US34657673A US3785264A US 3785264 A US3785264 A US 3785264A US 00346576 A US00346576 A US 00346576A US 34657673 A US34657673 A US 34657673A US 3785264 A US3785264 A US 3785264A
Authority
US
United States
Prior art keywords
lever
pin
warning
swinging
shutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00346576A
Other languages
English (en)
Inventor
P Loseries
T Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ernst Leitz Wetzlar GmbH
Minolta Co Ltd
Original Assignee
Ernst Leitz Wetzlar GmbH
Minolta Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ernst Leitz Wetzlar GmbH, Minolta Co Ltd filed Critical Ernst Leitz Wetzlar GmbH
Application granted granted Critical
Publication of US3785264A publication Critical patent/US3785264A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter
    • G03B9/62—Means for varying duration of "open" period of shutter by varying interval of time between end of opening movement and beginning of closing movement
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/18—More than two members

Definitions

  • ABSTRACT A swinging-sector camera shutter having a plurality of sectors; each sector has a plurality of blades including a primary blade and a plurality of covering blades.
  • the primary blades execute a combined rotary-sliding motion while the covering blades execute a rotary movement about a common pivot point.
  • the shutter has a control lever which, when the shutter is cocked, seizes and moves successively the operating crank of the first rotary slide and the operating crank of the second rotary slide.
  • the second slide is held in the ini- Jan.
  • the shutter has a holding magnet to which voltage is applied at least when the control lever starts operation and this magnet retains the pawl in the locking position against the force of the spring until the magnet is deenergized by a timer.
  • the shutter has a warning indicator comprising:
  • a warning lever which is longitudinally displaceable from a rest position into a functional position on a fixed pin by means of a slotted hole, and which is furthermore tiltable about this pin, one end of which is held, in the rest position, by means of spring force at a fixed abutment outside of the path of the operating crank of the first rotary slide;
  • the warning lever has a first pin which, in the rest position, is in the path of the disengaging armature locking lever for the second rotary slide and, when the armature drops off when the magnet is deenergized, is seized by this locking lever so that the one end of the warning lever is tilted, against spring force, into the path of the operating crank of the first rotary slide and is shifted thereby to such an extent that the armature locking lever slides off the first pin and releases the second rotary slide with a time delay with respect to the first rotary slide, for accomplishing its operating cycle;
  • the warning lever has a second pin which, when the warning lever is not tilted by the armature locking lever, is in the operational path of the control lever and is longitudinally shifted by the latter so that the first pin is no longer in the path of the dropping off armature locking lever.
  • the field of the invention is pivoted blade shutters for photographic cameras.
  • the invention is particularly concerned with actuating and control mechanisms for swinging-sector shutters for photographic cameras wherein the swinging-sectors are divided into a plurality of blades.
  • the present invention is directed to a cocking and control mechanism having a control lever which, when the shutter is cocked, first seizes and moves the operating crank of the first rotary slide and thereafter the operating crank of the second rotary slide, wherein the second slide is held, at the end of the cocking step, by an armature locking lever.
  • the locking lever is held in the blocking position, prior to the beginning of the operation of the shutter, by means of a spring and, after the beginningof the operation of the shutter, by means of a holding magnet, as disclosed in U. S. Patent Application Ser. No. 267,228, filed June 28, 1972.
  • the holding magnet is part of the electronic timer. At the beginning of the shutter release this magnet is energized and retains the armature locking lever in engagement with the second rotary slide until the electronically computed exposure time has elapsed. Thereafter, the magnet is deenergized and the armature locking lever releases the second rotary slide. If the holding magnet is inoperable for some reason, for example because the battery of the electronic timer control device is run down, the second rotary slide, during the release of the shutter, is not held by the armature locking lever, and runs off practically simultaneously with the manually triggered first rotary slide.
  • the shutter operates in the closed condition, so that no exposure of the film takes place, and simultaneously a warning lever is installed which, with one end, appears in a viewing aperture when the magnet does not respond and the shutter is run off without opening.
  • this embodiment represents an improvement of the aforementioned state of the art, because it draws the operators attention to the inoperative time control circuit, without burdening the user with additional manipulations, there is still the problem that the operator can no longer take pictures with a camera having such an inoperable timer control circuit.
  • Another object of the present invention resides, accordingly, in providing for switching over between the electronic timing mechanism and the mechanical timing mechanism. This can be selectively operated by the user, for example in order to save the battery of the electronic timing control circuit.
  • the problems of the prior art are solved by providing additionally a warning lever which can be longitudinally displaced from a rest position into a functional position by means of a slotted hole on a fixed pin, and is furthermore tiltable about this pin.
  • One end of the pin is held in the rest position by means of spring force at a fixed abutment outside of the path of the operating crank of the first rotary slide.
  • the warning lever is provided with a first pin which, in the rest position, is in the path of the dropping armature locking lever for the second rotary slide and is seized by this locking lever when the armature drops down because the magnet is not energized.
  • the warning lever has a second pin which, when the warning lever is not tilted by the armature locking lever, is in the operating path of the control lever and is longitudinally displaced by the latter so that the first pin no longer stands in the way of the later dropping armature locking lever.
  • the time delay in the course of the operation between the first rotary slide and the second rotary slide can be determined relatively simply from a constructional viewpoint and depends primarily on the design of that portion of the operating crank which cooperates with one end of the warning lever and displaces the latter. Due to the fact that the edge of the operating crank impinging on the warning lever is placed forward or backward to a greater or lesser extent (or due to the fact that the warning lever is made more or less long), the instant of release of the armature locking lever and thus of the operating crank for the second rotary slide can be varied. For this purpose, according to the present invention, such an arrangement or such dimensions are provided that this time delay corresponds approximately to the flash time of the shutter.
  • the warning lever is displaced longitudinally in the case of a mechanical as well as an electronic time computation.
  • the lever is additionally tilted beforehand in the case of mechanical triggering.
  • the front end of the warning lever appears, during the displacement, in an associated viewing aperture with laterally offset positioning in one case, as compared to the other. It is possible to employ this lateral displacement alone as an indication of the mechanical or electronic time computation.
  • a-first and a second sighting lever are provided, both levers being formed as coaxially arranged rocker arms.
  • the sighting levers are of different lengths, so that the first lever cooperates with the tilted (and longitudinally displaced) warning lever, whereas the second sighting lever cooperates with the untilted (and longitudinally displaced) warning lever.
  • the other ends of the sighting levers appear, during their tilting, in a viewing aperture, for example in the viewfinder of the camera, and the operator can see from the respectively appearing sighting lever whether the time was formed mechanically or electronically.
  • FIGS. 1 5 show schematically in elevational views, the control device of a rotary slide shutter in five functional phases with mechanical time computation;
  • FIGS. 6 8 show schematically in elevational views, three functional phases of the control device of FIGS. 1 5 with electronic time computation;
  • FIG. 9 is a circuit diagram of the electronic time con trol circuit.
  • numeral 50 denotes the shutter baseplate which has an image aperture 50a, behind which a first rotary slide of the shutter is visible, consisting of several blades 18. This is the slide which covers the image aperture in the cocked condition of the shutter.
  • the blades of this slide are moved by means of an operating crank 12, as well as a pin 12c attached to the crank and extending through a circular arc slot 26.
  • the blades of the second rotary shutter, covering the picture aperture in the released condition of the shutter are, in FIG. 1, disposed behind the upper part of the baseplate 50, folded into a pack, as in US. Pat. No. 3,628,438. They are moved by means of an operating crank 10, as well as a pin 10b attached to the crank and extending through a circular arc slot 25.
  • Two helical springs 17 and 18 are provided for moving the operating cranks l0 and 12. These springs are seated on the respective crank axles.
  • a control lever 2 which represents the main element of the control mechanism.
  • the control lever 2 is fixedly disposed on an axle 2a and can be rotated together therewith.
  • the control lever is furthermore biased by a spring 16 seated on the axle and tending to rotate the control lever in the clockwise direction, as illustrated in FIG. l.
  • the control lever 2 has two arms 2e and 20, as well as a pin 2b fixedly disposed on its central portion.
  • An analogous operative connection exists between the arm 20 and the operating crank 12 of the first slide, only with the difference that in this case the pin 2d is fixedly disposed on the arm 2c.
  • the pin 2b of the control lever cooperates with the pawl 11.
  • the control lever 2 additionally has a projecting lug, behind which a pawl l engages in the cocked condition of the shutter. This pawl is the actual shutter trigger, which must be actuated if the shutter is to be released for operation.
  • the armature locking lever 4 furthermore cooperates with a holding magnet so that the pawl 4 is held in engaged position against the force of the spring 5 when the first slide is in operation.
  • the construction is such that the releasing spring force occurs only when the control lever 2 has been released for operation, for this spring 5 is tensioned in the release position by the control lever only when the latter rotates in the clockwise direction.
  • a warning lever 6 is now provided which is mounted, by means of a slotted hole 6d, on a pin 7 fixedly attached to the baseplate.
  • a spring 21 engages the lower end of the warning lever and this spring tends to pivot the lever in the clockwise direction about the pin 7. This pivoting action is prevented by a pin 7a fixedly mounted on the baseplate. With its lower end, the warning lever 6 extends into the range of motion of the operating crank 12 and can optionally be shifted longitudinally along the pin 7 by means of this crank.
  • first sighting lever 13 and a second sighting lever 15 cooperate with the warning lever 6.
  • These sighting levers are under the force of springs 30 and 30a which tend to rotate them in the counterclockwise direction and thus to hold them in engagement with a pin 31 fixedly mounted to the camera.
  • the warning lever 6 either one or the other of the sighting levers can be tilted against the spring force in the clockwise direction, the free end of the respective lever entering a viewing aperture and thus becoming visible therein to the user.
  • the magnet 3 was energized, and now retains the armature locking lever 4 against the force of the spring 5 and releases the armature locking lever for disengagement only when the electronic circuit has deenergized the magnet 3. Then, the second slide, driven by the operating crank and the spring 19, follows the first slide and covers the image aperture 50a again.
  • the warning lever 6 has, in its central part, a fixed pin 6a which is opposed by the angled part 4b of the armature locking lever 4 so that the armature locking lever 4 cannot be pivoted until the release of the operating crank 10, as long as the pin 60 is in the way. However, this pin is moved out of the way by a longitudinal displacement of the warning lever 6. This is so, because the warning lever 6 has a further, fixed pin 6b which,
  • the warning lever 6 During its longitudinal displacement, the warning lever 6 has contacted, with its other end 6e, the end 150 of the second sighting lever and has tilted the latter so that the other end 15b thereof appears in the viewing window 14, which indicates to the operator that the exposure time has been computed electronically.
  • the mode of operation described hereinabove with reference to FIGS. 6, 7, and 8 is the normal mode of operation of the control device of the shutter.
  • This mode of operation is characterized in that the warning lever is displaced by the control lever, immediately after the triggering thereof, only in a longitudinal direction in order to remove the operative blockage (pin 6a) for the armature locking lever, so that the second rotary slide can follow the first rotary slide after an appropriate time.
  • the warning lever tilts the sighting lever 15 into the viewing window 14, in order to signal to the user the orderly progression of the shutter operation.
  • FIGS. 1 5 will now be used to describe the manner in which the control device functions when there is no electronic time computation, for example because the battery of the electronic timer control circuit is run down, or because this timer control circuit is defective for some other reason, or also because the user has purposely switched the timer control circuit so that a me chanical time computation takes place.
  • FIG. 1 shows the initial position of the control mech anism and the shutter.
  • the control lever 2 is in its cocked position and is held therein by means of the pawl 1.
  • the operating cranks l0 and 12 are in the cocked position wherein the crank 12 is held by the pawl 11 and the crank 10 is held by the armature locking lever 4.
  • the control lever 2 pulls the armature locking lever 4 with the armature 4a against the magnet 3 by the aid of the spring 5.
  • the control lever 2 rotates under the force of its spring 16 in the clockwise direction, as shown in FIG. 2.
  • the spring 5 is compressed, so that the latter now exerts a force on the armature locking lever 4 which rotates the lever in the counterclockwise direction.
  • this force is first ineffective. Since, in the present case, however, the magnet 3 is not energized, the armature locking lever is immediately rotated in the counterclockwise direction and thus impinges, with its angled portion 4b, on the pin 6a of the warning lever 6, and tilts the latter against the force of the spring 21 about the pin 7, likewise in the counterclockwise direction. This tilting, as illustrated in FIG.
  • the lower end 60 of the warning lever 6 enters the path of the operating crank 12 for the first rotary slide, especially the path of the edge 12a thereof.
  • the other end 62 of the warning lever is disposed opposite to the arm 13a of the sighting lever 13 and cooperates therewith during the further course of the operation.
  • the control lever first continues its rotation until it contacts with its pin 2b the pawl 11, lifts the latter off, and thus releases the operating crank 12 for the first rotary slide for its operating cycle, wherein, of course, the blades 18 uncover the image aperture 50a.
  • the operating crank 12 impinges with its edge from below against the warning lever 6 and displaces the latter in its longitudinal direction upwardly as shown in FIG. 4.
  • the pin 6a slides off the angled part 4b of the armature locking lever 4, so that now the armature locking lever can further rotate in the counterclockwise direction under the force of the spring 5, until the operating crank 10 of the second rotary slide is also ready and freed for operation.
  • the second slide then follows the first slide and again closes the image aperture 50a.
  • This time is equal to the exposure time which,
  • this mechanically formed exposure time can be varied within certain limits by the configuration of the cooperating elements.
  • the feature can be determined, for example, whether the crank 12 begins, during its operation, at an earlier or later instant to shift the warning lever by the size of the angled part 4b of the armature locking lever 4 in relation to the pin 6a, an effect can be exerted on whether the pin 6a, during the longitudinal displacement of the warning lever, slides off the part 4b at an earlier or later instant.
  • a variation of the mechanically formed exposure time is thus possible, and the constructional dimensions are made so that this mechanically formed exposure time corresponds to the flash time of the shutter, i.e. l/l00 second.
  • the warning lever 6 after its tilting, cooperates with the sighting lever 13.
  • the warning lever when the warning lever is shifted after tilting by the operating crank 12, it impinges on the end 13a of this sighting lever and pivots the other end 13b thereof into the viewing aperture 14.
  • the end 13b is of a different shape, and/or of a different color, than the end 15b of the sighting lever 15, and thus conveys to the operator an indication of how in this case the time formation was carried out.
  • FIG. 9 shows schematically the circuit of the electronic timing control device.
  • This circuit consists of an RC-member, a threshold value trigger, as well as the magnet 3 energized thereby.
  • a battery is provided as the voltage source, and the entire circuit is fed with a voltage by means of a main switch 31.
  • the RC- m-ember consists of the capacitor 32, as well as either a photoconductive cell 33 or one of several fixed resistors 34 to 37, which are staggered in correspondence with the standardized shutter time series, i.e. r r, ....r Furthermore, another fixed resistor 38 (r,) is provided.
  • the threshold switch is controlled conventionally.
  • This switch consists of the transistors 39 to 41 in a trigger circuit.
  • the transistor 39 thereof, which was first blocked, is made conductive when a specific capacitor voltage has been reached, whereupon the transistor 41 is simultaneously in the blocking condition and thus the magnet 3 is deenergized.
  • the RC-circuit has therein fixed resistors 42 to 44.
  • the variable resistor pertaining to the RC-circuit, including the photoconductive cell, are connected to the capacitor by means of a circuit wiper 23. This is effected by setting a setting means 22 operatively connected with the circuit wiper 23, which setting means can be adjusted with respect to an index 24.
  • the setting means is provided with markings A, lOOO 1, in the known staggering of the exposure times and with a markingX corresponding to resistance 38.
  • the capacitor with the photoconductive cell 33 is connected to an RC- member, and the magnet is cut off directly in dependence on the brightness of the object.
  • the corresponding fixed resistor is activated, and the magnet then is deenergized after respectively the elapse of the corresponding time period, i.e., for example after 1/1000 second or l/ second, or the like.
  • the resistor 38 When set to X, the resistor 38 is inserted, which is so low-ohmic that the magnet is deenergized almost immediately, after the control lever 2 has commenced operation.
  • the angled part 41) of the armature locking lever 4 impinges on the pin 60, and the time is formed mechanically.
  • the operator must set the setting means 22 to X if a mechanical time formation is desired.
  • a short-circuiting switch 45 is provided for the capacitor 32, which switch is opened by the control lever 2, for example when the first rotary slide begins operation, and thus makes it possible to charge the capacitor in the RC-circuit.
  • each swinging sector including a primary blade and a plurality of covering blades and being adapted for movement to and fro across said image aperture, and means cooperating with the primary blade of each said swinging sector to provide a combined rotary-sliding motion thereof in which the sliding component of motion extends substantially in the direction of the leading edge of the primary blade, means for actuating and tensioning said first and second swinging sector, means for providing a time delay between the actuation of said first and second swinging sectors, said means for actuating and tensioning comprising a control lever having first and second control surfaces, first latching means latching said lever and second latching means connected to a solenoid magnet, said solenoid magnet connected to said means for a time delay, said means for a time delay having a switch actuated by said first control surface, said first control surface connected to a first operating crank which in turn is connected to said means cooperating with the primary blade of said first swinging sector, said
  • a warning lever having a slotted hole (6d) for mounting on a fixed pin (7) to make said warning lever longitudinally displaceable and tiltable about said fixed pin, said warning lever having a first end (60) and a second end (6e), said first end spring biased against an abutment (7a) outside the range of motion of said first operating crank;
  • said warning lever having a first pin (6a) for contacting said second latching means (4) when said solenoid magnet is deenergized to tilt said first end into the range of motion of said first operating crank, said first pin subsequently disengaging said second latching means and said second latching means releasing said means for actuating said second swinging sector;
  • said warning lever having a second pin (6b) in the range of motion of said control lever and being longitudinally shifted by said control lever to remove said first pin from the range of motion of said second latching means when said warning lever is not tilted.
  • the swinging-sector camera shutter of claim 1 further comprising a viewing aperture, a first and a second sighting lever (13, which can be tilted, independently of each other, against spring force about a common axis so that one end thereof (13b, 15b) appears in said viewing aperture (14), and the other ends (13a,
  • said means for providing a time delay is an electronic circuit having a plurality of positions corresponding to specific exposure times wherein RC- members with different fixed resistors are employed, a position X wherein the switched-on fixed resistor (R is low-ohmic so that the solenoid magnet is deenergized so that the time is formed mechanically.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)
  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
US00346576A 1972-04-11 1973-03-30 Swinging-sector camera shutter with improved warning indicator Expired - Lifetime US3785264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3624972A JPS5312804B2 (enrdf_load_stackoverflow) 1972-04-11 1972-04-11

Publications (1)

Publication Number Publication Date
US3785264A true US3785264A (en) 1974-01-15

Family

ID=12464487

Family Applications (1)

Application Number Title Priority Date Filing Date
US00346576A Expired - Lifetime US3785264A (en) 1972-04-11 1973-03-30 Swinging-sector camera shutter with improved warning indicator

Country Status (2)

Country Link
US (1) US3785264A (enrdf_load_stackoverflow)
JP (1) JPS5312804B2 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051498A (en) * 1969-12-16 1977-09-27 Seiko Koki Kabushiki Kaisha Camera electric shutter with mechanical delay device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5753575B2 (enrdf_load_stackoverflow) * 1973-11-05 1982-11-13
JPS5290032U (enrdf_load_stackoverflow) * 1975-12-26 1977-07-05
JPS5532836U (enrdf_load_stackoverflow) * 1978-08-22 1980-03-03
JPS6366821U (enrdf_load_stackoverflow) * 1986-10-21 1988-05-06

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628438A (en) * 1970-01-02 1971-12-21 Leitz Ernst Gmbh Swinging sector camera shutter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628438A (en) * 1970-01-02 1971-12-21 Leitz Ernst Gmbh Swinging sector camera shutter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051498A (en) * 1969-12-16 1977-09-27 Seiko Koki Kabushiki Kaisha Camera electric shutter with mechanical delay device

Also Published As

Publication number Publication date
JPS5312804B2 (enrdf_load_stackoverflow) 1978-05-04
DE2312181B2 (de) 1975-09-18
JPS48104528A (enrdf_load_stackoverflow) 1973-12-27
DE2312181A1 (de) 1973-10-18

Similar Documents

Publication Publication Date Title
US3810227A (en) Shutter release locking device for camera
US3785264A (en) Swinging-sector camera shutter with improved warning indicator
US3829877A (en) Camera electric shutter with mechanical delay device
US3650193A (en) Bulb and time exposure control device for photographic camera
US3722392A (en) Camera shutter with novel operating mechanism
US3759156A (en) Photographic camera provided with electrically controlled shutter
US3788204A (en) Swinging-sector camera shutter with warning indicator
US3736850A (en) Single-lens reflex camera provided with a data photographing device
US3675561A (en) Photographic camera with focal plane shutter and interchangeable objective shutter
US3487759A (en) Photographic camera
US3386363A (en) Photographic shutter with electronically-controlled exposure timing device
US4123766A (en) Electrically controlled photographic shutter
US3699858A (en) Camera equipped with auto-flash device
DE3133875C2 (enrdf_load_stackoverflow)
US3812512A (en) Electronic shutter for photographic cameras
US3774514A (en) Electric control circuitry for camera shutters
US3707118A (en) Shutter mechanism
US3625128A (en) Camera self-timer
GB2030714A (en) Automatic Camera Lens Cover
US3890627A (en) Camera controls for blocking light entering through a viewfinder ocular
US3649109A (en) Automatic photographing device for cine camera
US4139295A (en) Safety device for an electrically controlled camera slit shutter
US3875579A (en) Through-the-viewfinder light shading device
US3601019A (en) Camera mechanism for automatic exposure by ambient or flash illumination
US3967298A (en) Electrically controlled photographic camera