US3768387A - Photographic camera having an electric timer device - Google Patents

Photographic camera having an electric timer device Download PDF

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Publication number
US3768387A
US3768387A US00294520A US3768387DA US3768387A US 3768387 A US3768387 A US 3768387A US 00294520 A US00294520 A US 00294520A US 3768387D A US3768387D A US 3768387DA US 3768387 A US3768387 A US 3768387A
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US
United States
Prior art keywords
power supply
supply unit
camera
shutter
detector
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
US00294520A
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English (en)
Inventor
G Hasegawa
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Canon Inc
Original Assignee
Canon Inc
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Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of US3768387A publication Critical patent/US3768387A/en
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    • 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
    • G03B9/70—Exposure-making shutters; Diaphragms with flash-synchronising contacts
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera

Definitions

  • This invention relates to a photographic camera having an electric timer device, and more particularly to a photographic camera having a flash unit therewithin or a camera of which a flash unit can be removably mounted.
  • the present invention incorporates an electric timer circuit in a camera body and enables a power supply unit for the electric timer circuit and a flash unit to be interchangeably and removably mounted on the camera body.
  • a first detector member for detecting it is displaced to mechanically release a rear screen retainer member which in turn is held by an electromagnet as soon asthe shutter release button is pressed.
  • the power supply to theelectromagnet is cut off and the rear screen is operated for automatic photography.
  • the first detector member returns to its initial position to hold the rear. screen retainer member and immediately after the front screen operated upon shutter release terminates its movement, the retention of the rear screen is released to provide a predetermined time of fully open shutter position, so that a proper F-value for such time is provided by manual adjustment to accomplish photography.
  • the present invention achieves additional effects as shown below.
  • a predetermined time of fully open shutter position may be mechanically provided without using the electric timer;
  • the power supply unit for the electric timer may be removed from the camera body to make the camera lighter in weight and easier to handle;
  • a distance adjust mechanism and aperture adjust mechanism for the objective lens are operatively associated together to enable an F-value matching the guide number of the flash unit to be automatically selected in accordance with the object distance.
  • FIGS. 1 to 3 are pictorial views of the camera according to the present invention, FIG. 1 showing the camera with a power supply unit mounted thereon, FIG. 2 showing the camera with the power supply unit removed therefrom, and FIG. 3 showing the camera with a flash unit mounted thereon instead of the power supply unit;
  • FIG. 4 is a perspective view showing the interior mechanism of the camera according to the present invention.
  • FIG. 5 is a side elevation, in vertical section, of the shutter drive system of the camera.
  • FIGS. 6, 7 and 8 are transverse sectional views taken along lines VIVI, VII-VII and VIII-VIII of FIG. 5,
  • FIG. 9 is a view illustrating the operation of the rear screen with the shutter charged
  • FIG. 10 is a view similar to FIG. 9 and showing the front screen released and the rear screen retainer member held;
  • FIG. 11 shows a mechanism for mechanically providing a predetermined time of fully open shutter position, with a power supply unit mounted and the shutter charged;
  • FIG. 12 is a view similar to FIG. 11 but with a flash unit mounted instead of a power supply unit;
  • FIG. 13 is a view similar to FIG. 12 but with the front screen released and the rear screen released;
  • FIG. 14 is a perspective view illustrating the operative association between a distance ring and an aperture ring
  • FIG. 15 is a'view of the mechanism for operatively associating the distance ring with the aperture ring.
  • FIG. 16 is a view similar to FIG. 15 but with the flash unit removed from the camera body.
  • asingle lens reflex camera body C includes an interchangeable lens L, a release button RB, a film advance knob Kl, a film rewind knob K2, and a finder eyepiece I.
  • an accessory shoe SH is provided for selectively mounting a power supply battery unit P or a flash unit.
  • the power supply unit P is mounted on the camera C as shown in FIG. I
  • an electric shutter circuit contained within the camera C becomes effective and the exposure control may be effected in accordance with a shutter speed determined by a later-described photoelectric element for receiving a light beam passed through the interchangeable lens L.
  • the electric shutter in'the camera automatically becomes inoperative and provides a constant speed shutter whose speed is mechanically controlled.
  • the flash unit When, as shown in FIG. 3, the flash unit is mounted'on the camera in the position of FIG. 2, the electric shutter in the camera remains inoperative and again provides aconstant speed shutter whose speed is mechanically controlled.
  • lever 113 (a first detector) hasone end 117 thereof urged into'rotation against the force of spring 118 by a wall of the power supply unit P while a pin 116 provided on the other end of the lever is brought to a position beyond the operating range of lever 104, and lever 109 is also rotated by pin 115 until one end 110 thereof is brought to a position beyond the operating range of lever 73.
  • gear 5 When the film advance knob l is rotated, gear 5 is rotated by means of pins 2 and 6. This causes gear 9- meshing-with gear 5 and gears 12 and 14 to be all rotated in the directions of respective arrows, which in turn causes gear 17'to be rotated by lever 16 on a disc secured tothe shaft of the gear 14. The rotation of gear 17 is transmitted to gear 19, which rotates rollers 20 and 21 integral therewith and accordingly moves front screen ribbons 29 wound on the rollers, thus winding up a front screen against the force of spring 31.
  • a rear screen drum 23 is also rotated by means of pin 24 received in a groove 27 formed in the front screen ribbon roller 21, thereby.
  • lever 43 strikes lever 16 at one end 139 thereof (FIG. 6), to thereby rotate the lever 16 counter-clockwise against the force of spring 140 and disengage the pawled portion 138 of lever 16 from a pin 13l 0n the front screen gear, thus permitting the front screen to be moved with rotation of the ribbon rollers 20 and 21.
  • a pin 47 on charge lever 43 is displaced to disengage switch contacts 98 and 99 from each other and start charging a capacitor C.
  • a time control circuit A is operated to deenergize the electromagnet 80.- As a result, the iron piece 79 is releasedfrom the electromagnet toallow lever 73 to be rotated clockwise by spring 81. At the same time, lever 82 engaged with pin on lever 73 is rotated in the same direction to disengage pawl 85 from the pawled portion 26 of the rear screen moving pawl plate 25, so that the rear screen'w ound on the drum 23 is moved to cover the surface of film, thus completing a picture-taking cycle.
  • the flash unit F instead of the power supply unit I, being mounted on the camera body, the lever 113 (first detector member). causes lever 109 to be rotated by the force of spring 1 18 until the end 110 of the lever 109 strikes the lever 73. Thereupon, pin 116 on lever 113 is positioned within the operating range of lever On the other hand, the flash unit F thus mounted causes a circuit to be formedv by timing terminals T3,
  • lever 165 is rotated clockwise to cause the arm] 181 of ring to rotate cam ring 175, thus providing an F-value matching the distance determined by the distance adjust ring 169.
  • cam ring 175 The camming surface 177 of cam ring 175 is engaged by a pin 184 on bell crank lever 182.
  • the intermediate lever 195 is restrained from movement with the underside of the arm 197 thereof engaged with unshown shutter operating lever of the camera body.
  • the main switch MS When the shutter button 37 is depressed to release the shutter, the main switch MS is first closed but no current flows to the electromagnet 80 and the iron piece 79 is not attracted, because the power supply unit P is not mounted on the camera body.
  • a windmill ring 186 operatively associated therewith via intermediate lever 195, projection 196 and arm'189 is rotated by the force ofspring 190 until the arm 18,7 of ring 186 strikes the end of bell crank ring 182.
  • a shutter blade 191 having a pin 192 received in an aperture 188 formed in the windmill ring 186 is rotated to provide a predetennined F-value.
  • the position of the camming surface 177 of cam ring 175 may be adjusted also by a preset ring 172.
  • pin 131 strikes one end 102 of lever 101 to rotate this lever, which closes switch contacts 107 and 108 to cause flashing of the flash unit. Also, a portion 105 of lever 104 and pin l16 cooperate together to rotate levers 113 and 109 against the force of spring allow movement of the rear screen.,lmmediately before the movement of the rear screen is terminated, the end 121 of lever 119 is struck to open switch contacts 123 and 124, thus completing a series of operations.
  • lever 56 When the shutter button 37 is depressed with the disc 95 converted to the bulb photography mode, lever 56 is rotated clockwise against the force of spring 59 to disengage the end 58 of lever 56 from pin 62.
  • the pawled portion 95 is moved into engagement with the pawl 53 of lever 48.
  • lever 43 is rotated counter-clockwise by the force of spring 54 so that the end 43' thereof rotates lever 16 to disengage pawl 138 from pin 131, thus starting the front screen.
  • One end 55 of lever 43 tends to actuate to rotate the pin 50 on the lever 48, whereas such tendency is prevented by the engagement between the pawl 53 of lever 48 and the pawl 92 of lever 89 and accordingly, levers 78 and 82 are not actuated with the pawl 85 oflever 82 maintained in engagement with the pawl 26 of the rear. screen moving pawl plate 25, thus maintaining the rear screen unactuated.
  • lever 56 is rotated counter-clockwise to its initial position by the force of spring 59 to thereby cause pin 62 to rotate lever 89 clockwise and disengage pawl 92 from pawl 53, thus permitting slight counterclockwise rotation of lever 48 until the pin 51 thereon is disengaged from a portion 78 oflever 73.
  • levers 73 and 82 are rotated clockwise by the force of spring 81 to disengage the pawl 85 of lever 82 from the pawl 26 of .pawl plate 25, thus starting the rear screen to complete an exposure.
  • an electric timer circuit is incorporated in the camera body and a power supply unit therefor and a flash unit may be interchangeably mounted on the camera body. Therefore, automatic photography using the electric timer can be accomplished when the power supply unit is mounted on the camera body.
  • the first detector member When the power supply unit is removed from the camera body, the first detector member retains the rear screen retainer member and such retentionof the rearv screen is released immediately before the termination of the. front screen movement in response to such movement, thereby mechanically providing a predetermined time of fully open shutter position without using the electric shutter. Therefore, ordinary daylight photography can be achieved by manually adjusting and setting a proper F-value for such fully open shutter time.
  • the second detector member establishes an operative association between the distance adjust mechanism and the aperture adjust mechanism to permit an F-value matching the guide number of the flash unit to be automatically selected in accordance with the distance adjustment, thus automating the flash photography.
  • the power supply unit for the electric timer is unused and removed during flash photography, and this contributes to a lighter weight of the camera body andto a greater ease with which the camera body is handled.
  • a photographic camera having an electric shutter comprising:
  • a power supply unit mounted on a portion of said housing
  • power supply unit retainer means provided on a side wall of said housing for mounting said power supply unit
  • first detector means for detecting the casing'of said power supply unit retained by said retainer means; shutter opening means;
  • shutter closing means engageable with said detector means for starting the closing operation of the shutter
  • electromagnet means operatively associated with said shutter closing means
  • an electronic timer circuit having the output thereof connected with said electromagnet means for electrically effecting a time-counting operation and changing over the operation of said electromagnet means, in accordance with theoutput at the end of said time-counting operation;
  • said detector means having an engaging member movable into engagement and disengagement with 7 said shutter opening means, said shutter closing means being released in response to said engaging member; said engaging member being displaced into disengaged position by said detector member when said power supplyunit is mounted on said camera housing, and displaced into engaged position when said power supply unit is removed from said camera housing.
  • said camera housing includes a flxed shoe receiving means for mounting said power supply unit, said shoe receiving means being engageable with a shoe provided on said power supply unit.
  • a photographic camera wherein said camera housing includes a side wall having retainer means carrying an electrode, and said power supply unit comprises a casing, a power supply battery contained in said casing, a second engaging member formed on one side wall of said casing and engageable with said retainer means, and an electrode led out to the surface of said second engaging member, said power supply unit being held by said retainer means of the camera with the aid of said second engagber into disengaged position.
  • a photographic camera having an electric shutter comprising:
  • a shutter a shutter; a housing for. the camera a power supply unit mounted on a portion of said housing; v
  • said second retainer means comprises a flash timing contact electrode.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
  • Shutters For Cameras (AREA)
US00294520A 1971-10-20 1972-10-03 Photographic camera having an electric timer device Expired - Lifetime US3768387A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46083113A JPS4848127A (de) 1971-10-20 1971-10-20

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US3768387A true US3768387A (en) 1973-10-30

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US00294520A Expired - Lifetime US3768387A (en) 1971-10-20 1972-10-03 Photographic camera having an electric timer device

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JP (1) JPS4848127A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166680A (en) * 1977-01-27 1979-09-04 Olympus Optical Co., Ltd. Strobo unit for camera

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50119627A (de) * 1974-03-04 1975-09-19
JPS519440A (en) * 1974-07-15 1976-01-26 Canon Kk Shatsuta byojiseigyohoshiki
JPS512419A (en) * 1974-06-25 1976-01-10 Canon Kk Shatsuta asochi
JPS5144337U (de) * 1974-09-28 1976-04-01
JPS5153044U (de) * 1974-10-21 1976-04-22
JPS58162Y2 (ja) * 1975-02-26 1983-01-05 京セラ株式会社 フオ−カルプレ−ンシヤツタオソナエルイチガンレフレツクスカメラノドウチヨウスイツチソウチ
JPS5263329A (en) * 1975-11-20 1977-05-25 Canon Inc Shutter release system for camera
JPS5290032U (de) * 1975-12-26 1977-07-05
JPS52109832U (de) * 1976-02-16 1977-08-20

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393620A (en) * 1964-11-11 1968-07-23 Voigtlaender Ag Camera capable of making flash exposures
US3407718A (en) * 1965-04-09 1968-10-29 Compur Werk Gmbh & Co Photographic apparatus
US3437021A (en) * 1964-11-26 1969-04-08 Paul Kapteyn Photographic camera including an electronic flash device
US3439596A (en) * 1967-01-18 1969-04-22 Eastman Kodak Co Retractile lens camera with automatic exposure control system and battery preserving switch
US3470799A (en) * 1964-02-12 1969-10-07 Agfa Ag Camera structure for indicating when the camera is ready for operation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4943534U (de) * 1972-07-27 1974-04-17

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470799A (en) * 1964-02-12 1969-10-07 Agfa Ag Camera structure for indicating when the camera is ready for operation
US3393620A (en) * 1964-11-11 1968-07-23 Voigtlaender Ag Camera capable of making flash exposures
US3437021A (en) * 1964-11-26 1969-04-08 Paul Kapteyn Photographic camera including an electronic flash device
US3407718A (en) * 1965-04-09 1968-10-29 Compur Werk Gmbh & Co Photographic apparatus
US3439596A (en) * 1967-01-18 1969-04-22 Eastman Kodak Co Retractile lens camera with automatic exposure control system and battery preserving switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166680A (en) * 1977-01-27 1979-09-04 Olympus Optical Co., Ltd. Strobo unit for camera

Also Published As

Publication number Publication date
DE2251366A1 (de) 1973-04-26
JPS4848127A (de) 1973-07-07
DE2251366B2 (de) 1975-06-05

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