GB975304A - Method and apparatus for making flash exposures - Google Patents

Method and apparatus for making flash exposures

Info

Publication number
GB975304A
GB975304A GB2471463A GB2471463A GB975304A GB 975304 A GB975304 A GB 975304A GB 2471463 A GB2471463 A GB 2471463A GB 2471463 A GB2471463 A GB 2471463A GB 975304 A GB975304 A GB 975304A
Authority
GB
United Kingdom
Prior art keywords
lever
blade
shutter
switch
lamp
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
Application number
GB2471463A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 US204436A external-priority patent/US3200722A/en
Priority claimed from US232810A external-priority patent/US3139805A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB975304A publication Critical patent/GB975304A/en
Expired legal-status Critical Current

Links

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
    • G03B9/70—Exposure-making shutters; Diaphragms with flash-synchronising contacts
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)

Abstract

975,304. Flash guns. EASTMAN KODAK CO. June 21, 1963 [June 22, 1962; Oct. 24, 1962], No. 24714/63. Heading G2A. A device for firing a flash lamp comprises a flash lamp socket connected through a first switch to a source of electric power, a shunt circuit with a second switch arranged parallel to the socket and means for sequentially closing the second switch, the first switch and opening the second switch. The means may also simultaneously operate a camera shutter. In the camera shown in Fig. 1, the shutter 18 has a slot 26 for uncovering aperture 28, is pivoted at 20 and is operated by means of a strip 38<1> in a slidable release 38 which engages notches 42, 44 of a lever 34 alternatively, lever 34 and blade 18 being connected by a spring 30. Flash lamp 50 and its power source 48 are connected in series between pin 48 on lever 38 and pivot pin 36 of lever 34. The shunt circuit includes the blade 18 and a lead between steps 22, 24 for the blade. In the embodiment shown in Fig. 3 shutter blade 58 is spring urged clockwise but is latched in its cocked position by lever 64 pivoted at 68. It is released by slide 72 and cocked by the manual anticlockwise rotation of cover-blade 84 which engages a pin 88 on blade 58. The lamp 92 and battery 10 are arranged between springs 74, 70 engaging levers 72, 64 respectively and lamp 92 is shunted through spring 62, blade 58 and lever 64. In similar embodiment the shutter blade is spring urged into a cocked position and is operated by a hammer release lever. In the embodiment shown in Fig. 6, shutter blade 49 is pivoted at 51 and is operated by the depression of levers 17, 31 which release a hammer lever 37 pivoted at 39. Lever 31 is conducting and is electrically insulated from lever 17, contact 75 of lever 31 is always in engagement with contact 73. Contact 73 is connected through flash lamp 21 and battery 57 to contact 63 with which lever 31 engages when it is depressed. Levers 37, 31 are connected in parallel with lamp 21. In the above embodiment camera parts 18, 34, 38, 38<1>, 58, 64, 72, 37, 31 are electrically conductive, and blade stops 22, 24, 104, 130 and lever supporting pins 33 are adjustable during manufacture of the camera so that the shutter characteristics correspond with those of the flash.
GB2471463A 1962-06-22 1963-06-21 Method and apparatus for making flash exposures Expired GB975304A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US204436A US3200722A (en) 1962-06-22 1962-06-22 Apparatus for making flash exposures
US232810A US3139805A (en) 1962-10-24 1962-10-24 Flash lamp synchronizing mechanism

Publications (1)

Publication Number Publication Date
GB975304A true GB975304A (en) 1964-11-11

Family

ID=26899478

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2471463A Expired GB975304A (en) 1962-06-22 1963-06-21 Method and apparatus for making flash exposures

Country Status (8)

Country Link
AT (1) AT260018B (en)
BE (1) BE633835A (en)
CH (1) CH406836A (en)
DE (1) DE1197748B (en)
DK (1) DK113047B (en)
GB (1) GB975304A (en)
NO (1) NO118134B (en)
SE (1) SE309906B (en)

Also Published As

Publication number Publication date
NO118134B (en) 1969-11-10
CH406836A (en) 1966-01-31
DK113047B (en) 1969-02-10
BE633835A (en)
AT260018B (en) 1968-02-12
SE309906B (en) 1969-04-08
DE1197748B (en) 1965-07-29

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