GB872639A - A photographic flash-lamp device - Google Patents

A photographic flash-lamp device

Info

Publication number
GB872639A
GB872639A GB24739/60A GB2473960A GB872639A GB 872639 A GB872639 A GB 872639A GB 24739/60 A GB24739/60 A GB 24739/60A GB 2473960 A GB2473960 A GB 2473960A GB 872639 A GB872639 A GB 872639A
Authority
GB
United Kingdom
Prior art keywords
spring
shutter
lever
crystal
plunger
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
GB24739/60A
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.)
General Electric Co
Original Assignee
General Electric 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
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB872639A publication Critical patent/GB872639A/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
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
    • G03B15/0452—Electrical ignition means connected to the shutter
    • G03B15/0463—Piezoelectric ignition mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K5/00—Light sources using charges of combustible material, e.g. illuminating flash devices
    • F21K5/02—Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q2/00—Lighters containing fuel, e.g. for cigarettes
    • F23Q2/28—Lighters characterised by electrical ignition of the fuel
    • F23Q2/285—Lighters characterised by electrical ignition of the fuel with spark ignition
    • F23Q2/287—Lighters characterised by electrical ignition of the fuel with spark ignition piezoelectric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/002—Igniters using electrically-produced sparks using piezoelectric elements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

872,639. Photographic flash lamps. GENERAL ELECTRIC CO. Jan. 1, 1958 [Feb. 13, 1957], No. 24739/60. Divided out of 872,638. Class 9(2). [Also in Group XX] A lamp containing actinic material is flashed by connecting the electrodes to a piezoelectric crystal 46 and deforming the crystal to produce the necessary electric energy. Leads 47, 48 connect the crystal to a photoflash bulb such as described in Specification 29/58, and deformation of the crystal is synchronized with a camera shutter mechanism. When a plunger 16 is depressed, a lever 19 is rotated and stresses a spring 21, which engages a lug 23 on a shutter member 24. Lever 19 moves away from a projection 26 of the member 24 and strikes a bell-crank lever 28 causing the latch 31 to disengage from a lug 32 of the member 24. The spring 21 then rotates the shutter and exposes the aperture 33. As the shutter pivots, a pin 36 moving in a slot 37 moves a lever 34, so stressing a spring 38 that, at the instant the aperture 33 is uncovered, a disc 40 rotates, bringing an arcuate slot 42 across the aperture 33. A stop 44 limits the movement of the disc 40. While the shutter operates, the lever 34 releases an arm 51, which is rotated by a spring 53, so that a hammer 55 strikes the crystal 46 and thus generates a high voltage to flash the lamp. On release of the plunger 16, a spring 54 returns the arm 51 to its original position, the plunger and shutter members 24, 40 being returned by a spring 17.
GB24739/60A 1957-02-13 1958-01-01 A photographic flash-lamp device Expired GB872639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US872639XA 1957-02-13 1957-02-13

Publications (1)

Publication Number Publication Date
GB872639A true GB872639A (en) 1961-07-12

Family

ID=22204109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24739/60A Expired GB872639A (en) 1957-02-13 1958-01-01 A photographic flash-lamp device

Country Status (1)

Country Link
GB (1) GB872639A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000307A (en) * 1977-03-22 1979-01-04 Kodak Ltd Shutter mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000307A (en) * 1977-03-22 1979-01-04 Kodak Ltd Shutter mechanism
GB2000307B (en) * 1977-03-22 1982-01-06 Kodak Ltd Shutter mechanism

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