US3767908A - Electronic flash unit with flash tube ignition circuit mounted on back of reflector - Google Patents

Electronic flash unit with flash tube ignition circuit mounted on back of reflector Download PDF

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Publication number
US3767908A
US3767908A US00245459A US3767908DA US3767908A US 3767908 A US3767908 A US 3767908A US 00245459 A US00245459 A US 00245459A US 3767908D A US3767908D A US 3767908DA US 3767908 A US3767908 A US 3767908A
Authority
US
United States
Prior art keywords
reflector
outside surface
ignition circuit
ignition
flash tube
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
US00245459A
Other languages
English (en)
Inventor
K Ackermann
S Uecker
R Socha
H Reiber
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3767908A publication Critical patent/US3767908A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • 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
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
    • G03B2215/0578—Flashtube mounting
    • 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
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0582—Reflectors

Definitions

  • the outside surface of the reflector has a rib with a recess for holding the ignition coil and two projecting tongues for retaining the ignition capacitor. Further, two lugs extend from the outside surface of the reflector for receiving a rubber band which extends from one lug to the other and also encompasses the ignition coil and capacitor, thereby retaining same in a fixed position relative to the reflector.
  • This invention relates to electronic flash units having a reflector and an ignition circuit for the flash tube which is mounted in the reflector.
  • Battery operated electronic flash arrangements are known in which the flash tube, the reflector, and the ignition circuit elements are mounted together within a housing, for example a small box, which may be detachably connected to the main unit, which may be a camera or, if an automatic flash control circuit is used, said automatic flash control circuit.
  • the ignition circuit elements that is in particular the ignition capacitor and the ignition coil for the flash tube, are mounted on a special mounting plate which is rigidly mounted within the small box.
  • the ignition circuit elements are arranged'on the outside surface of the reflector.
  • the outside surface of the reflector designates the surface which, after assembly, is contained within the housing of the flash unit and is invisible from the outside.
  • a special mounting plate is eliminated.
  • the space available within the flash unit is utilized within the best possible manner.
  • the present invention is an electronic flash unit comprising a reflector having an inside and outside surface, a flash tube mounted in said reflector, and an ignition circuit for igniting said flash tube, said ignition circuit having at least one ignition circuit element mounted on said outside surface of said reflector.
  • various projections and a rib having a recess are on the outside surface of the reflector, in order to maintain the ignition circuit elements in a fixed position relative to said reflector.
  • the reflector means may have lugs between which are connected elastic retaining means such as a rubber band, said retaining means also passing around the ignition circuit elements, thereby maintaining these 'circuit elements in said fixed position relative to the reflector.
  • elastic retaining means such as a rubber band
  • FIGURE is a top view of the unit comprising the reflector, flash tube and ignition circuit elements in accordance with the present invention.
  • a flash tube 1 is arranged within a reflector 2.
  • Reflector 2 has an outside surface which comprises a rib 3 which has a recess 4. This recess serves to receive the cylindrical coil form of ignition coil 5, whose secondary winding is connected to the ignition electrode of flash tube 1. Further, the outside surface of reflector 2 has two tongue-like projections numbered 7 and 7, between which is arranged the ignition capacitor 6 which in turn is electrically connected to the primary winding of ignition coil 5.
  • elastic retaining means here an endless rubber band 8 is attached to two projecting lugs numbered 9 and 10.
  • Electronic flash unit comprising, in combination, a reflector having an inside and an outside surface; a flash tube mounted in said reflector; and an ignition circuit for igniting said flash tube, said ignition circuit having a first and second ignition circuit element mounted on said outside surface of said reflector, said reflector having a rib integrally connected with said outside surface, said rib having at least one recess for retaining said first ignition circuit element in a fixed position relative to said reflector, said outside surface of said reflector further having at least one projection for retaining said second ignition circuit element in a fixed position relative to said reflector; further comprising a first and second lug rigidly connected with said outside surface of said reflector and elastic retaining means extending from said first to said second lug and encompassing said first and second ignition circuit elements.
  • Electronic flash unit comprising, in combination, a reflector having an inside and an outside surface; a flash tube mounted in said reflector; an ignition circuit for igniting said flash tube, said ignition circuit having said elastic retaining means is a rubber band.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US00245459A 1971-04-22 1972-04-19 Electronic flash unit with flash tube ignition circuit mounted on back of reflector Expired - Lifetime US3767908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19717115377U DE7115377U (de) 1971-04-22 1971-04-22 Blitzgeraet mit einem reflektor

Publications (1)

Publication Number Publication Date
US3767908A true US3767908A (en) 1973-10-23

Family

ID=6620722

Family Applications (1)

Application Number Title Priority Date Filing Date
US00245459A Expired - Lifetime US3767908A (en) 1971-04-22 1972-04-19 Electronic flash unit with flash tube ignition circuit mounted on back of reflector

Country Status (2)

Country Link
US (1) US3767908A (de)
DE (1) DE7115377U (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223372A (en) * 1977-09-02 1980-09-16 Fuji Koeki Corporation Electric flash device
EP0380118A2 (de) * 1989-01-27 1990-08-01 Konica Corporation Kamera mit einer Elektronenblitzeinheit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624831A (en) * 1949-06-28 1953-01-06 Edward R Farber Unitary portable photographic illumination source
US2754408A (en) * 1952-09-10 1956-07-10 Bolsey Jacques Flash guns
US2825795A (en) * 1953-11-25 1958-03-04 Andrew F Henninger Flashtube mounting structure
US3484597A (en) * 1966-05-21 1969-12-16 Loewe Opta Gmbh Reflector for an electronic photographic flash unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624831A (en) * 1949-06-28 1953-01-06 Edward R Farber Unitary portable photographic illumination source
US2754408A (en) * 1952-09-10 1956-07-10 Bolsey Jacques Flash guns
US2825795A (en) * 1953-11-25 1958-03-04 Andrew F Henninger Flashtube mounting structure
US3484597A (en) * 1966-05-21 1969-12-16 Loewe Opta Gmbh Reflector for an electronic photographic flash unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4223372A (en) * 1977-09-02 1980-09-16 Fuji Koeki Corporation Electric flash device
EP0380118A2 (de) * 1989-01-27 1990-08-01 Konica Corporation Kamera mit einer Elektronenblitzeinheit
EP0380118A3 (de) * 1989-01-27 1991-10-09 Konica Corporation Kamera mit einer Elektronenblitzeinheit
US5146251A (en) * 1989-01-27 1992-09-08 Konica Corporation Camera with electronic flash unit

Also Published As

Publication number Publication date
DE7115377U (de) 1971-07-22

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