US3688663A - Shutter device - Google Patents

Shutter device Download PDF

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Publication number
US3688663A
US3688663A US93721A US3688663DA US3688663A US 3688663 A US3688663 A US 3688663A US 93721 A US93721 A US 93721A US 3688663D A US3688663D A US 3688663DA US 3688663 A US3688663 A US 3688663A
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US
United States
Prior art keywords
shifting
contact
shutter
stopping
blade
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
US93721A
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English (en)
Inventor
Takashi Uchiyama
Tadashi Ito
Mutsuhide Matsuda
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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP1969120729U external-priority patent/JPS5126137Y1/ja
Application filed by Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of US3688663A publication Critical patent/US3688663A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • A' shutter device with a synchronizer contact which comprises a shifting member which shifts from its standard position with a constant shutter opening rate, and a blade for determining a blade opening in correspondence to the amount of the shifting movement; said synchronizer contact being closed by the shifting member at the time when the blade opening reaches a value determined for an appropriate artificial exposure.
  • FIGJ. 1 A first figure.
  • shutter speed is set at a constant speed such as 1/30 to 1/60 second and a diaphragm opening is determined by a flash automechanism with exposure factors such as photographing distance, film sensitivity and guide number, etc. and the timing for closing synchronized contacts and when the shutter is fully opened a synchronizer switch for a flash device contacts for its illumination.
  • One of the objects of the present invention is to im prove the above-mentioned known camera by providing a shutter device with a synchronizer contact.
  • the main features of the present invention lie in a shutter device with a synchronizer contact which comprises a shifting member which shifts from its standard position with a constant shutter opening rate, and a blade for determining a blade opening in correspondence to the amount of the shifting movement; said synchronizer contact being closed by the shifting member at the time when the blade opening reaches a value determined for an appropriate artificial exposure.
  • FIG. 1 is a front elevation showing schematically the arrangement of main parts of the shutter device according to the present invention.
  • FIG. LA is a side view showing an indicating means of the shutter device shown in FIG. 1.
  • FIG. 2 shows a circuit construction for the shutter device of the present invention.
  • FIG. 3 is a characteristics diagram showing the relationship among the blade opening and the time after the blade opening and a contact time of the synchronizer switch.
  • FIG. 4 is a characteristics diagram showing the similar relationship for a shutter device applicable to a speed light device.
  • FIG. 5 is a characteristics diagram showing the relation-ship between the shutter blade opening and the time after the beginning of the shutter opening.
  • FIG. 6 is a characteristics diagram showing the relationship among the shutter opening, the time after the beginning of the shutter opening and the time of flash illumination.
  • FIG. 7 is a characteristics diagram showing the relationship among the blade opening the time after the beginning of the blade opening and the time of flash illumination in case of a long time illumination.
  • FIG. 8 is a circuit diagram applicable to the shutter device according to the present invention.
  • FIG. 9 and FIG. 10 are modifications of the circuit shown in FIG. 8.
  • FIG. 11 also shows schematically modification of the circuit shown in FIG. 8 and
  • FIG. 12 shows in detail a part of the circuit shown in FIG. 1 1.
  • l is a fixed member to a camera
  • 2 is a shutter release lever
  • 3 is a shutter ring for operating shutter blades, rotatable in a counter clockwise direction for opening the shutter blades.
  • 4 is an adder member for flash-auto mechanism. Pins 5, 6 and 7 are planted on the adder member 4, wherein the pin 5 engages with a distance cam 8 fixed to a distance ring 39 for shooting distance, the pin 6 engages with a changeover ring 29 with a guide number cam 9, and the pin 7 engages with a groove 1, of the fixed member I (a shutter casing). As the pin 7 is allowed in the movement only in a radial direction, the adder member 4 swings only around the pin 7.
  • I l is a returning spring for the release lever 2
  • I2 is a main switch for a shutter speed control circuit as illustratively shown in FIG. 2.
  • I3 is a ratch member, forced to rotate in a counter clockwise direction, for a control lever 14 which controls the release motion of a shutter blade 3' and controls the closure of the main switch 12.
  • the lever 14 is forced to rotate in a clockwise direction.
  • 15 and 19 show a delay device for gradually opening the shutter blades 3' through the shutter ring 3, and 20 to 27 show a driving device to give a closing action to the shutter blades when an appropriate exposure is made.
  • the driving device is locked during the time of energization of an electro-magnet 28.
  • the change-over ring 29 is both for BB photographing and artificial light photographing, and the guide number cam 9 for artificial light photographing is provided in the inside of the changeover ring 29.
  • the stepped portion 2b of the release lever 2 engages with and rotates the ratch member 13 to release the engagement of the ratch member 13 with the control lever 14.
  • the control lever 14 thus freed rotates in a clockwise direction to close the main switch 12, and at the same time an anchor 18 of the delay device is started to move.
  • a gear 17 with a pin 19 thereon starts rotating in a clockwise direction by the action of a spring (not shown) for the delay device.
  • a spring (not shown) for the delay device.
  • the gear 17 rotates, the lever 16 is freed from the pin 19, and the shutter ring 3 which has been held in a static position by the lever 16 rotates in a counter clockwise direction, following the movement of the pin 19 through the release lever 16 with the aid of a spring 30, thus the shutter starts its opening with a constant rate.
  • C is the capacitance of the capacitor 32, R, is the resistance of the photo conductive element 31 and V is the voltage of a power source 33.
  • the delay device of the members 16 to 19 comprises a spring for its delay action, and the spring for its delay action is charged for example by a film winding or return back motion of the release bar 2. In the latter case, the device is called an even-set type.
  • FIG. 5 The relationship between the shutter blade opening and the time after the beginning of the shutter opening for BB photographing for the above embodiment shown in FIG. 1 is illustrated in FIG. 5.
  • the side portion 2a of the release bar 2 and the side portion 14a of the lever 14 engage with each other, thus stopping the anchor 18, and at the same time the ratch member 13 comes in contact with the stepped part 2b of the release bar 2, closing the starter switch 42 again and opening the main switch 12 member 44.
  • 47 is a member for resetting the indicating member 44 against its frictional engagement.
  • the member 47 may be associated with the film winding mechanism or the like.
  • the change-over ring 29 is rotated by a predetermined amount for the guide number of artificial light used, and as the distance ring 39 is rotated according to a shooting distance from the camera to an object, the adder member 4 is rotated around the pin 7 by the guide number cam 9 and the distance cam 8, through the pins 5 and 6 respectively and a contact member 40 which is fixed to or elastically supported around the adder member 4 for determining the blade opening and the time for closing synchronizer contacts is shifted within the path of the pin 41 which is planted to a projection of the shutter ring 3 for the shutter blades 3 of the shutter speed control circuit.
  • a contact member 40 which is fixed to or elastically supported around the adder member 4 for determining the blade opening and the time for closing synchronizer contacts is shifted within the path of the pin 41 which is planted to a projection of the shutter ring 3 for the shutter blades 3 of the shutter speed control circuit.
  • indicating numerals for indicating F numbers In case of a conventional shutter device, an F number of the shutter device is hardly previewed or postviewed. However, the indicating means shown in FIG. 1 is easily functions for the postview of the F numbers, i.e., the shutter speed in this case, because the frictional engagement is provided with the indicating member.
  • the synchronizer contacts are contacted when the prescribed diaphragm value is obtained by the shutter releasing operation.
  • the shutter starts closing immediately after illumination of a flash tube P, and the mode of the shutter operation is shown by the curve T in FIG. 6, thus other lights than the artificial light source does not afi'ect the photographing.
  • the device in such a way that the switches 42, 43 are closed for the shutter closure always with an elapse of a prescribed length of time after the synchronizer contact switch X, is closed.
  • the mode of the shutter operation for this case is shown by the curve T, in FIG. 7.
  • the shutter device comprises a shifting member such as the shutter ring 3 which shifts from its standard position with a constant shutter opening rate, and a blade for determining the blade opening in correspondence to the amount of the shifting movement, the blade openings 1, f,, f, and f, correspond directly to the time for illumination of the flash device t,, 2,, t, and 1, respectively.
  • the shutter device according to the present invention is applicable to a flash photographing with a flash bulb as shown in FIG. 2 in which a program switch S, for changing over from a terminal EE for EE photographing to a terminal FA for flash photographing is changed over by the change over ring 29 shown in FIG. 1.
  • the flash bulb P has a rather long timeto-peak and a rather long illumination time
  • overexposure is apt to result when the object to be photographed has lights other than the light from the flash bulb.
  • the result is that the overexposure is reduced.
  • the circuit shown in FIG. 8 is useful for the above case, in which P, is a power source for a flash device comprising a main capacitor C, a discharge tube P and a transformer T; for triggering the ignition or illumination of the discharge tube P.
  • FIG. B shows a portion provided in a camera in which 32 is a timer capacitor similar to the capacitor 32 but in this case is use also for a capacitor for a triggering circuit, X, is a synchronizer switch provided in the camera.
  • Other portions of the camera E are omitted in FIG. 8, but are easily understood from the description made referring to FIG. 2.
  • I, and I are a first coiling and a secondary coiling for the transformer T,
  • the timer capacitor 32' for a time control circuit in the camera E is commonly used in the triggering circuit composed of the first coiling l, and the synchronizer switch for rendering the device very compact with a simple construction.
  • Circuits shown in FIGS. 9 to 12 are similar to those of the embodiments shown in FIGS. 1, 2 and 8, but a contactless synchronizer switching means is provided in each of the circuits.
  • FIG. 9, 38' is a variable resistor for photographing informations such as guide number shooting distance or film sensitivity.
  • S is a program switch which is associated with the change-over switch S, and which is opened when the switch S, contacts with the terminal FA.
  • R is a collector resistor of the transistor TR, for
  • D is a Zener diode connected to the emitter of the transistor TR, for determination of the inverting level of the transistor TR,.
  • an electro-magnet 28' is connected in series with the first coiling l, of the transformer T, and therefore when the change-over switches S, and S, are changed over for BB photographing, the first coiling l, is terminated by the switch S, to kill the operational coupling of the transformer for triggering the discharge tube P.
  • the first coiling l, of flash device F is provided in parallel with the electro-magnet 28' with the aid of connector means W, and W,.
  • the functional behavior is quite similar to that shown in FIG. 9.
  • FIG. 11 is a main portion of a camera, the details of which are shown in FIG. 12.
  • R is a common emitter resistor for the transistors TR, and TR,
  • L is a lamp one end of which is commonly connected to the collector of the transistor TR, and the base of the transistor TR, S, is a change-over switch which is closed for flash photographing, and which is opened for BB photographing.
  • P is a photo-transistor which is coupled with the lamp L to receive the light therefrom.
  • R is a resistor and C, is a capacitor. The resistor R, and the capacitor C, are connected in series with the first coiling 1,.
  • the photo-transistor P is connected in parallel with the series circuit of the capacitor C, and the first coiling 1,.
  • a and B represent parting terminals of the flash device and the camera.
  • the lamp L is illuminated for shorting the photo-transistor P, which serves as a synchronizer switch.
  • a shutter apparatus for synchronization with a flash comprising a shutter member movable across a path of light for variably blocking the quantity of light traveling along a path, shifting means coupled to said shutter member and movable along a predetermined path for movement from a starting position toward one of a plurality of positions at each of which the member blocks a different amount of light, speed control retarding means engaging said shifting means for controlling the speed of movement of said shifting means and thereby said shutter member, setting means for setting flash lighting conditions, closeable circuit means for triggering the flash when closed, contact means forming a part of said circuit means and movable by said setting means to a plurality of positions depending upon the flash lighting conditions, and contact actuating means mounted on said shifting means and movable with said shifting means to engage said contact means for closing the circuit means, said contact actuating means and said contact means forming flash synchronizing means.
  • said shutter means includes a blade and wherein said shifting means includes a rotatable shifting member coupled to the blade and moving the blade while said shifting member rotates.
  • said shutter means comprises a blade and wherein said shifting means includes a rotatable shifting member coupled to the blade and moving said blade while said shifting means rotates.
  • said retarding means includes stopping means for stopping and reversing the movement of said shifting means, said stopping means including a lock member engageable with said shifting means and a drive mechanism releasable at a predetermined time to contact said lock member for driving said shifting means in the reverse direction.
  • said retarding means includes stopping means coupled to said setting means for stopping the movement of said shifting means at a predetermined position and driving said shifting means back to its starting position in response to said setting means.
  • An apparatus as in claim 1 further comprising indicating means movable by said shifting means to a position corresponding to the position toward which said shifting means moves, said indicating means including friction means for retaining said indicating means in the position to which it has been moved by said shifting means when said shifiing means returns to its starting position.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Shutter-Related Mechanisms (AREA)
US93721A 1969-12-01 1970-11-30 Shutter device Expired - Lifetime US3688663A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP9666569 1969-12-01
JP10021869 1969-12-12
JP1969120729U JPS5126137Y1 (fr) 1969-12-18 1969-12-18
JP20969 1969-12-27

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US3688663A true US3688663A (en) 1972-09-05

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US93721A Expired - Lifetime US3688663A (en) 1969-12-01 1970-11-30 Shutter device

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US (1) US3688663A (fr)
DE (1) DE2058680B2 (fr)
FR (1) FR2072646A5 (fr)
GB (1) GB1327940A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2514535A1 (de) * 1974-04-03 1975-10-30 Canon Kk Belichtungssteuereinrichtung fuer eine photographische kamera
US4174161A (en) * 1969-11-06 1979-11-13 Canon Kabushiki Kaisha Exposure control system
US4192595A (en) * 1977-08-23 1980-03-11 Copal Company Limited Electroflash controlling circuit including a delay circuit for electrically controlled focal plane shutters
US4311371A (en) * 1976-06-25 1982-01-19 Minolta Camera Kabushiki Kaisha Exposure control system for camera
US4375912A (en) * 1978-01-25 1983-03-08 Ricoh Company, Ltd. Electric circuits for use in camera

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3033453C2 (de) * 1980-09-05 1984-01-05 Balda-Werke Photographische Geräte und Kunststoff GmbH & Co KG, 4980 Bünde Elektrisch gesteuerter Programmverschluß

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273482A (en) * 1963-02-06 1966-09-20 Gauthier Gmbh A Photographic camera with automatic diaphragm setting in the flash range
US3452659A (en) * 1965-08-03 1969-07-01 Agfa Gevaert Ag Camera with photoflash unit
US3466447A (en) * 1965-12-01 1969-09-09 Compur Werk Gmbh & Co Photoelectric operated diaphragm setting means for cameras
US3491670A (en) * 1965-11-23 1970-01-27 Prontor Werk Gauthier Gmbh Photographic camera with an automatic film sensitivity setting device
US3511144A (en) * 1967-02-16 1970-05-12 Agfa Gevaert Ag Photographic camera with illuminating arrangement
US3512463A (en) * 1966-07-28 1970-05-19 Agfa Gevaert Ag Camera with built-in exposure meter for daylight and flash photography
US3515047A (en) * 1966-10-29 1970-06-02 Zeiss Ikon Ag Photographic camera with flash exposure range
US3555984A (en) * 1965-12-04 1971-01-19 Prontor Werk Gauthier Gmbh Photographic camera having an electronic exposure timing device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273482A (en) * 1963-02-06 1966-09-20 Gauthier Gmbh A Photographic camera with automatic diaphragm setting in the flash range
US3452659A (en) * 1965-08-03 1969-07-01 Agfa Gevaert Ag Camera with photoflash unit
US3491670A (en) * 1965-11-23 1970-01-27 Prontor Werk Gauthier Gmbh Photographic camera with an automatic film sensitivity setting device
US3466447A (en) * 1965-12-01 1969-09-09 Compur Werk Gmbh & Co Photoelectric operated diaphragm setting means for cameras
US3555984A (en) * 1965-12-04 1971-01-19 Prontor Werk Gauthier Gmbh Photographic camera having an electronic exposure timing device
US3512463A (en) * 1966-07-28 1970-05-19 Agfa Gevaert Ag Camera with built-in exposure meter for daylight and flash photography
US3515047A (en) * 1966-10-29 1970-06-02 Zeiss Ikon Ag Photographic camera with flash exposure range
US3511144A (en) * 1967-02-16 1970-05-12 Agfa Gevaert Ag Photographic camera with illuminating arrangement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174161A (en) * 1969-11-06 1979-11-13 Canon Kabushiki Kaisha Exposure control system
DE2514535A1 (de) * 1974-04-03 1975-10-30 Canon Kk Belichtungssteuereinrichtung fuer eine photographische kamera
USRE32425E (en) * 1974-04-03 1987-05-26 Canon Kabushiki Kaisha Exposure control system for flash photography
US4311371A (en) * 1976-06-25 1982-01-19 Minolta Camera Kabushiki Kaisha Exposure control system for camera
US4192595A (en) * 1977-08-23 1980-03-11 Copal Company Limited Electroflash controlling circuit including a delay circuit for electrically controlled focal plane shutters
US4375912A (en) * 1978-01-25 1983-03-08 Ricoh Company, Ltd. Electric circuits for use in camera

Also Published As

Publication number Publication date
FR2072646A5 (fr) 1971-09-24
DE2058680B2 (de) 1974-10-03
DE2058680A1 (de) 1971-07-22
GB1327940A (en) 1973-08-22

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