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    Photographic camera
    1.
    发明授权
    Photographic camera 失效

    公开(公告)号：US3537375A

    公开(公告)日：1970-11-03

    申请号：US3537375D

    申请日：1968-10-18

    Applicant: AGFA GEVAERT AG

    Inventor： KIPER GERD ,  FAUTH GUNTER

    IPC: G03B7/16 ,  G03B7/12

    CPC classification number: G03B7/16

    Abstract: 1,220,977. Photographic exposure control. AGFA-GEVAERT A.G. Nov. 1, 1968 [Nov.3, 1967], No.51962/68. Heading G2A. A camera having a photo-electric exposure control means also has an exposure value setting device for flash exposures which is coupled to a distancesetting means. The known exposure means shown includes a spring-loaded slide 4 whose stepped edge explores the position of the galvanometer needle 3 whose deflection is determined by the illumination received by a photo-sensitive element. The slide 4 engages by pin-and-slot means an exposure value setting member 9 which has a cam surface 15 engaging in turn a pin 16 of a diaphragm aperture setting lever 18. Pin 16 also engages the slotted end of a diaphragm leaf 20. The setting member 9 also has a forked arm 22 engaging a pin 23 of an exposure time setting member 24 supported coaxially with the objective 25. The objective can be adjusted by means of a distance setting ring 30, using a pointer 31 and range scale 32. Ring 30 has a cam surface 33 engaging a pin 34 of a flash exposure value setting lever 35. Lever 35, which pivots on a fixed pin 36, carries a pin 37 bearing against a cam surface 38 of an intermediate lever 39, which has another cam surface 44 bearing against a pin 45 of the aperture setting lever 18. Thus there is a lost motion coupling between the distance setting ring 30 and the aperture setting lever 18. Intermediate lever 39 is pivoted freely on a flash guide number setting means 41, which has a pointer 42 reading against a flash guide number scale 43. The camera has a socket 47 for receiving a flash cube 49. When a flash cube is loaded in position, a rod 51, and hence a slide 52, is pushed downwards, so that pin 34 bears against cam 33. If the available daylight illumination is adequate, the setting member 9 rotates the aperture setting lever 18, with which it is connected by a spring 21, so that the aperture closes down from a fully open position to the appropriate setting. Member 9 also simultaneously sets the exposure time member 24 in accordance with the prevailing illumination. The downward movement of the camera release 14 initially allows slide 4 to move downwards under the action of spring 11, and finally actuates the shutter release 29 to effect the exposure. If the illumination is poor, the slide 4 will move needle 3, so that a relatively large aperture is set. In this case, however, the diaphragm is closed down further by the distance setting ring 30 acting on the flash exposure setting lever 35. Thus the effective aperture is reduced to the correct value for flash exposure. When the flash cube is removed, slide 52 moves upwards under the action of spring 50, so that lever 35, and hence pin 34, is moved away from cam surface 33. This movement is followed by the loosely linked intermediate lever 39. Consequently movement of the distance setting ring 30 now has no effect on the aperture setting lever 18, this being influenced only by slide 4 and setting member 9. Details of the mechanism can be modified as in Figs. 2 and 3 (not shown).

    Flash intensity regulating circuit for flash cameras
    6.
    发明授权
    Flash intensity regulating circuit for flash cameras 失效
    用于闪存摄像机的闪存强度调节电路

    公开(公告)号：US3465656A

    公开(公告)日：1969-09-09

    申请号：US3465656D

    申请日：1966-10-28

    Applicant: AGFA GEVAERT AG

    Inventor： WICK RICHARD ,  BIEDERMANN FRIEDRICH ,  WINKLER ALFRED ,  BESTENREINER FRIEDRICH ,  KIPER GERD ,  PAWLIK GUNTER ,  SYBEL REINHARD VON ,  WASILIEWSKI ERWIN VON ,  WAGNER KARL

    IPC: G03B7/16 ,  G03B15/05 ,  H05B41/32 ,  G01J1/52 ,  G01J1/36

    CPC classification number: H05B41/325 ,  G03B7/16 ,  G03B15/05 ,  G03B2215/0525

    Abstract: 1,166,095. Electronic flash apparatus. AGFA-GEVAERT A.G. Oct.27, 1966 [Oct.28, 1965], No.48187/66. Heading G2A. An electronic flash apparatus for attachment to, or incorporation in a photographic camera has means for producing a preliminary flash of predetermined intensity to illuminate a subject whilst the camera shutter is closed, and means for producing a second flash whilst the shutter is open, the intensity of the second flash being varied by photo-electric means in inverse relation to the illumination of the subject produced by the combination of the preliminary flash and ambient illumination. The two flashes may be produced in a single flash-tube 52 connected in a firing circuit 6 powered by a D.C. supply circuit 11 and containing capacitors 39 and 40 for providing the energy for the first and second flashes respectively and ignition coils 49, 50 with associated capacitors 41, 42; the second firing is initiated by a mono-stable Schmidt trigger circuit 11 controlled by a time-circuit 9 containing a photoresistor 14 and a capacitor 17. In operation, a switch 30 is closed to charge up the capacitors, which charging is indicated by audible or visible means; the shutter release is then depressed first closing a switch 13 which renders the timecircuit ready for operation and then simultaneously opening a switch 18 and closing switches 45, initiating a controlled discharge of capacitors 40, and 53, causing ignition of the preliminary flash. Opening of switch 18 causes capacitor 17 to be charged through photo-resistor 14, until after a time determined by the illumination of the latter, the voltage of the capacitor is such to change the state of a relay 28 in the trigger circuit; this closes contacts 28a, 28b of the relay, thus respectively shorting out a diode 43 which prevents capacitor 40 being totally discharged and effecting an ignition of the flash-tube. The intensity of the flash, which is governed by the voltage of capacitor 40 which is determined by the time it discharges before firing, which is controlled by the photo-resistor in the time-circuit. In modifications the voltage of capacitor 40 may be varied by charging instead of discharging, and/or relay 28 may actuate the closing of an electromagnetic shutter.

    Photographic camera with electronic flash unit
    10.
    发明授权
    Photographic camera with electronic flash unit 失效
    摄影摄像机与电子闪光灯

    公开(公告)号：US3426661A

    公开(公告)日：1969-02-11

    申请号：US3426661D

    申请日：1966-07-05

    Applicant: AGFA GEVAERT AG

    Inventor： WICK RICHARD ,  BIEDERMANN FRIEDRICH ,  WINKLER ALFRED ,  BESTENREINER FRIEDRICH ,  KIPER GERD ,  PAWLIK GUENTER ,  SYBEL REINHARD VON ,  WASIELEWSKI ERWIN VON

    IPC: G03B7/16 ,  G01J1/00 ,  G03B9/02 ,  G03B9/70

    CPC classification number: G03B7/16

    Abstract: 1,151,888. Photographic cameras. AGFAGEVAERT A.G. July 12, 1966 [July 14, 1965], No.31263/66. Heading G2A. A photographic camera has a timing circuit including a capacitor 25 and a photo-electric cell 24 exposed to the prevailing illumination and a resistor 30, 31 in parallel with the photo-electric cell for taking into account (a) the guide number of the flash apparatus and (b) the distance from the subject to produce for a flash exposure an appropriate diaphragm aperture. An everset shutter 1 has an opening ring 2 and a closing ring 3. Blades 5 are carried on pins 4 on the ring 2 and have pin and slot connections 35, 36 with ring 3. A retarding mechanism 10, 11 retards the closing of ring 2. A release lever 16 rotates the ring 2 counter clockwise until a pawl 14 moves out of the path of a pin 13. A pin 8 rotates ring 3 through a stop 9. A pawl 18 is actuated out of the path of a lug 3a by a solenoid 20 in the timing circuit, such that ring 3 rotates clockwise to terminate exposure after a predetermined time related to the value of the resistor 30, 31. When a flash exposure is required a switch 37 is closed a switch 38 is opened by a cam 2b at the commencement of an exposure to cause capacitor 25 to charge through photo-cell 24. A transistor 28 causes to conduct when the base of a transistor 27 ceases to be negative with respect to its emitter, such that solenoid 20 is de-energized. Lug 3a closes a switch 21 to operate the flash apparatus with the shutter open.

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