US3739166A - Photoflash device - Google Patents

Photoflash device Download PDF

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Publication number
US3739166A
US3739166A US00214246A US3739166DA US3739166A US 3739166 A US3739166 A US 3739166A US 00214246 A US00214246 A US 00214246A US 3739166D A US3739166D A US 3739166DA US 3739166 A US3739166 A US 3739166A
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United States
Prior art keywords
reflector
lamp
envelope
photoflash
base
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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
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US00214246A
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English (en)
Inventor
R Anderson
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General Electric Co
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General Electric Co
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Publication date
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Publication of US3739166A publication Critical patent/US3739166A/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
    • 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
    • G03B15/0442—Constructional details of the flash apparatus; Arrangement of lamps, reflectors, or the like

Definitions

  • a photoflash device with a photoflash lamp mounted within a reflector the lamp being mountable in the reflector only in one or the other of two 180 apart axially oriented positions, has only one moisture indicator spot so located on the inside wall of its transparent envelope .as to be viewable from in front of the reflector either directly or by reflection off the reflector irrespective of which one of the axially oriented positions the lamp is mounted in within the reflector.
  • This invention relates in general to photoflash devices comprising a photoflash lamp mounted within a reflector, and more particularly to such a device having a single moisture indicator spot on the inside wall of the lamp envelope.
  • each of the flash lamps in the aforementioned flashcube array, as well as in most other multiple flash lamp arrays, are generally mounted in one or the other of two predetermined axially oriented positions 180 apart within the associated reflector, it has been customary heretofore to employ two such indicator spots located diametrically opposite one another on the envelope wall and spaced therearound approximately 90 from the axial mounting plane of the lamp so that no matter which of the two 180 apart oriented positions the lamp is mounted in within the reflector, one or the other of the indicator spots of the lamp envelope will always face outwardly of the reflector so as to be exposed to the view of one examining the lamp.
  • Another object of the invention is to provide a multiple flash lamp array comprised of a plurality of adjacent flash lamp and reflector assemblies the individual flash lamps of which are each provided with only one moisture indicator spot which is visible from the front of the respective reflector either directly or by reflection off the reflector irrespective of which one of two 180 apart axially oriented mounting positions of the lamp it is mounted in within the respective reflector.
  • the flash lamp of a combination flash lamp and reflector assembly of the type wherein the flash lamp is mountable in either one of two 180 apart axially oriented positions within the reflector is provided with only one moisture indicator spot on the inside wall of the flash lamp envelope, the indicator spot being located within either one of two diametrically opposite arcuate extents of the lamp envelope, each centered relative to the axial plane of the lamp envelope extending transversely to the reflector axis whereby the indicator spot is visible from in front of the reflector either directly or by reflection off the reflector irrespective of which one of the two 180 apart axially oriented positions the flash lamp is mounted in within the reflector.
  • FIG. 1 is an elevation on an enlarged scale of a photoflash device in the form of a flashcube embodying the invention, with the moisture indicator spot of the flash lamp being shown as directly visible.
  • FIG. 2 is a view similar to FIG. 1 but showing the flash lamp mounted instead in the flashcube reflector in a position rotated 180 from that of FIG. 1 and showing the moisture indicator spot visible as a reflected image off the reflector instead of directly as in FIG. 1.
  • FIG. 3 is an elevation on an enlarged scale of the flash lamp of the photoflash device comprising the invention.
  • FIG. 4 is a sectional view on the line 4-4 of FIG. 1.
  • each flash lampreflector unit or assembly 1 is comprised of a miniature size flash lamp 3, such as that commonly referred to as an AG-l type flash lamp, mounted within the innermost part of the associated reflector 2 which, as is customary, is of generally parabolic curvature. As shown in FIG.
  • the flash lamp 3 is comprised of a tubular shaped light-transmitting hermetically sealed glass envelope 4 which is formed at one end with an external flattened press seal portion 5. Sealed into the envelope 4 is a lamp mount structure 6 comprised of a pair of lead-in wires 7, 8 which are fixedly supported in spaced side-by-side relation by a glass bead 9 fused therearound. The lead-in wires 7, 8 are sealed through the flattened press seal and extend outwardly in an endwise direction therefrom. An ignition filament 10 of tungsten or a tungsten-rhenium alloy is mounted within the envelope 4, the filament being connected across the inner ends of the lead-in wires 7, 8.
  • Coatings ll of a suitable primer material such as an admixture of zirconium, magnesium and potassium perchlorate powders bonded together by a binder such as nitrocellulose, are provided on the inner tip ends of the lead-in wires 7, 8 and on at least the opposite end portions of the filament 10 where it connects with the lead-in wires.
  • the envelope 4 contains a loosely distributed quantity 12 of a suitable light-producing filamentary combustible material such as, for example, a shredded foil of zirconium, aluminum or hafnium, together with a filling of a combustion-supporting gas such as oxygen at a suitable pressure up to as high as several atmospheres, e.g., 7 atmospheres or so.
  • the envelope 4 is formed, at the end thereof opposite its press seal end 5, with an exhaust tip 13 left by the tipping off of a glass exhaust tubulation on the envelope after the evacuation and filling thereof through the exhaust tubulation with the combustion-supporting gas filling.
  • flash lamp-reflector assemblies 1 employing flash lamps 3 of the so-called electrically ignited type having an ignition filament 10 which is adapted to be heated by the passage of an electric current therethrough from a battery or other source of electric power
  • the invention is applicable as well to flash lamp-reflector assemblies 1 employing flash lamps having various other type of lamp ignition means such as, for example, the percussively ignited type flash lamps which are employed in conventional percussive-ignited flashcubes in common use at present under the commercial designation Magicube and which are ignited by the striking of a hammer blow against a readily deformable metal ignition tube which contains a percussively ignitable primer or fulminating material and is sealed into and opens into the interior of the lamp envelope.
  • percussively ignited type flash lamps are disclosed, for example, in U.S. Pat. No. 3,535,063, Anderson et al.
  • each flash lamp'reflector assembly 1 may be constituted of preformed plastic sheet material having a light-reflective coating and defining an inwardly dished individual light reflecting surface 14 of suitable shape such as generally parabolic curvature, as is conventional in customary flashcube and other multiple photoflash lamp arrays.
  • the reflector 2 may be formed with a tunnel portion 15 at its innermost region for partially accommodating therein the tubular glass envelope 4 of the flash lamp, as shown in FIG. 4.
  • the tunnel portion 15 extends all the way down to the bottom of the reflector 2 to form a shroud portion 16 at its lower end for accommodating therein the entire lower end portion of the flash lamp 3.
  • the photoflash device 1 may be provided with the customary base 17 made of a suitable synthetic plastic for mounting the device on a camera.
  • the base 17 includes a platform support portion 18 of substantially square shape, with its edges bowed outwardly a slight amount, on which platform the orthagonally arranged array of reflectors 2 rest.
  • the platform support 18 has a plurality of apertures through which the lead-in wires 7, 8 of the respective flash lamps in the array extend to the under side where they are bent around an annular contact ring or collar 19 integral with and depending from the under side of the platform support to form the electrical contacts 7, 8 for the individual flash lamps of the array.
  • the base 17 is also formed with a center post 20 depending from the under side of the platform support 18 and terminating in a plurality of radially outward extending retaining lugs 21 adapted to engage with locking or clamping means in the flashcubereceiving socket of a camera to retain the flashcube in place in the socket.
  • a transparent or light-transmitting cover or shield 22 ofa single molded piece of a suitable synthetic plastic material such as polystyrene and of substantially cubic shape is disposed over the array of flash lamp-reflector assemblies 1 to provide a protection from possibly rupturing flash lamps in the array as well as to prevent direct touching of the lamps while they are still in their highly heated condition immediately following the flashing thereof.
  • the cover 22 is permanently affixed at its bottom edge to the platform support 18 by suitable means as, for example, by an adhesive or by heat-sealing or ultrasonic welding.
  • the individual flash lamps 3 are mounted in their associated reflectors 2 with the axis XX (FIG. 3) of the lamp envelope 4 disposed transversely to the axis RR (FIG. 4) of the reflecting surface 14 of the associated reflector 2, and with the lamp oriented about its axis to position the plane PP (FIG. 4) of its flattened press portion 5 transversely to the reflector axis RR.
  • each flash lamp 3 in such an axially oriented position in its associated reflector 2 serves to align the outer end portions of the lead-in wires 7, 8 protruding straight out from the press seal 5 of the lamp with the outer side wall of the contact ring 19 on the flashcube base 17 so that these protruding wire portions, during the flashcube assembly operation, can be threaded straight down through the apertures provided for them in the platform support 18 and will thus extend closely alongside the outer side wall of the contact ring 19 in position for bending therearound to form the lamp contacts 7, 8' thereon.
  • two such moisture indicator spots have generally been provided on the inside wall of each flash lamp envelope, the two indicator spots being located on more or less diametrically opposite sides of the envelope and generally in that axial plane of the lamp extending normal to the plane PP of the lamp press portion 5 and parallel to the reflector axis.
  • the spot 23 will be visible to the viewer of the flash lamp-reflector assembly 1, either directly or by reflection off the reflector 2 from the front thereof, if the flash lamp 3 happens to be mounted, in the reflector 2 during the production manufacture of the assembly 1, in that axially oriented mounting position of the lamp in the reflector which results in the single indicator spot 23 facing outwardly of the reflector, as shown in FIG. 1 and in solid lines in FIG. 4.
  • the flash lamp 3 happens to be mounted in the reflector 2, during the production manufacture of the assembly 1, in that axially oriented mounting position of the lamp 3 which results in the single indicator spot 23 facing inwardly of the reflector 2, as shown in dotted lines in FIGS. 2 and 4, then in that case the indicator spot 23 will be visible to the viewer, from the front of the reflector, as a reflected image 23' off the reflector 2, as indicated in FIG. 2 and by the arrows 23" in FIG. 4.
  • the single indicator spot 23 located on the envelope 4 in the manner according to the invention nevertheless will be clearly visible to the viewer of the flash lamp-reflector assembly 1 either directly, as shown in FIG. 1, or indirectly as a reflected image 23' off the reflector 2, as shown in FIG. 2.
  • the single indicator spot 23 is located on the envelope 4 a substantial distance beyond the prescribed approximately 30 limit to one or the other side of the mounting plane PP of the flash lamp 3, then in that event the indicator spot 23 most likely would not be visible by reflection off the reflector 2 in the case where the lamp 3 is mounted in the reflector with its one indicator spot 23 facing inwardly thereof, the reflected image 23 of the indicator spot 23 in such case either being obstructed or blocked off from view by the outermost side portions of the flash lamp 3 itself, or else being reflected off the generally cylindrically curved wall of the tunnel portion 15 of the reflector 2 in a direction radially back toward the center axis XX of the flash lamp 2 so as to also be effectively blocked off from view by the lamp itself.
  • a photoflash device comprising a base, a reflector positioned with respect to said base, and a photoflash lamp mounted on said base adjacent the innermost region of said reflector, said photoflash lamp including an elongated light-transmitting envelope disposed with its longitudinal axis extending transversely to the reflector axis of symmetry, said lamp being mountable on said base in either one of two positions spaced apart about its longitudinal axis, said lamp being mountable on said base, in each of said positions, with its longitudinal axis in a mounting plane disposed approximately normal to the reflector axis, the combination therewith of a single spot of a moisture indicating material on the inside wall of said envelope, said indicator spot being located with its center on a line passing through the longitudinal axis of said envelope and extending at an angle of approximately 30 to either side of said mounting plane in each of said two posi- 3.
  • a photoflash device as specified in claim 1 including four of said devices located adjacent one another, with adjacent ones of said devices mounted at right angles to each other and with their said reflectors facing outwardly to form four sides of a cube.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
US00214246A 1971-12-30 1971-12-30 Photoflash device Expired - Lifetime US3739166A (en)

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US21424671A 1971-12-30 1971-12-30

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JP (1) JPS4878926A (de)
DE (1) DE2262882A1 (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542458A1 (de) * 1974-09-25 1976-04-15 Gte Sylvania Inc Elektrisch zuendbare fotoblitzlampe
US4053757A (en) * 1974-09-30 1977-10-11 General Electric Company Photoflash lamp array having radiation switches and flash indicators
US6783616B1 (en) * 1998-05-28 2004-08-31 Nico-Pyrotechnik Hanns Juergen Diederichs Gmbh & Co. Kg Method to produce pyrotechnical igniting mixtures
US20080148817A1 (en) * 2006-12-22 2008-06-26 The Boeing Company Leak Detection in Vacuum Bags
US20090148647A1 (en) * 2007-12-07 2009-06-11 The Boeing Company Method of Fabricating Structures Using Composite Modules and Structures Made Thereby
US20090145545A1 (en) * 2007-12-07 2009-06-11 The Boeing Company Composite Manufacturing Method
US20100012260A1 (en) * 2007-05-22 2010-01-21 Brennan Joseph D Pre-patterned layup kit and method of manufacture
US20100078126A1 (en) * 2008-09-30 2010-04-01 The Boeing Company Compaction of Prepreg Plies on Composite Laminate Structures
US20100170326A1 (en) * 2006-12-22 2010-07-08 The Boeing Company Leak detection in composite tools
US20100220182A1 (en) * 2009-02-27 2010-09-02 General Electric Company System and method for adjusting engine parameters based on flame visualization
US8707766B2 (en) 2010-04-21 2014-04-29 The Boeing Company Leak detection in vacuum bags
US8936695B2 (en) 2007-07-28 2015-01-20 The Boeing Company Method for forming and applying composite layups having complex geometries
US9770871B2 (en) 2007-05-22 2017-09-26 The Boeing Company Method and apparatus for layup placement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586470A (en) * 1969-11-19 1971-06-22 Sylvania Electric Prod Photoflash lamp

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542458A1 (de) * 1974-09-25 1976-04-15 Gte Sylvania Inc Elektrisch zuendbare fotoblitzlampe
US4053757A (en) * 1974-09-30 1977-10-11 General Electric Company Photoflash lamp array having radiation switches and flash indicators
US6783616B1 (en) * 1998-05-28 2004-08-31 Nico-Pyrotechnik Hanns Juergen Diederichs Gmbh & Co. Kg Method to produce pyrotechnical igniting mixtures
US20080148817A1 (en) * 2006-12-22 2008-06-26 The Boeing Company Leak Detection in Vacuum Bags
US9046437B2 (en) 2006-12-22 2015-06-02 The Boeing Company Leak detection in vacuum bags
US20100170326A1 (en) * 2006-12-22 2010-07-08 The Boeing Company Leak detection in composite tools
US8438909B2 (en) 2006-12-22 2013-05-14 The Boeing Company Device and method for detecting an air leak in a tool
US7849729B2 (en) * 2006-12-22 2010-12-14 The Boeing Company Leak detection in vacuum bags
US20110079174A1 (en) * 2006-12-22 2011-04-07 The Boeing Company Leak Detection in Vacuum Bags
US8505361B2 (en) 2006-12-22 2013-08-13 The Boeing Company Leak detection in vacuum bags
US10603848B2 (en) 2007-05-22 2020-03-31 The Boeing Company Apparatus for layup placement
US9770871B2 (en) 2007-05-22 2017-09-26 The Boeing Company Method and apparatus for layup placement
US20100012260A1 (en) * 2007-05-22 2010-01-21 Brennan Joseph D Pre-patterned layup kit and method of manufacture
US8568551B2 (en) 2007-05-22 2013-10-29 The Boeing Company Pre-patterned layup kit and method of manufacture
US8936695B2 (en) 2007-07-28 2015-01-20 The Boeing Company Method for forming and applying composite layups having complex geometries
US10052827B2 (en) 2007-07-28 2018-08-21 The Boeing Company Method for forming and applying composite layups having complex geometries
US9500593B2 (en) 2007-07-28 2016-11-22 The Boeing Company Leak detection in vacuum bags
US20090145545A1 (en) * 2007-12-07 2009-06-11 The Boeing Company Composite Manufacturing Method
US20090148647A1 (en) * 2007-12-07 2009-06-11 The Boeing Company Method of Fabricating Structures Using Composite Modules and Structures Made Thereby
US8752293B2 (en) 2007-12-07 2014-06-17 The Boeing Company Method of fabricating structures using composite modules and structures made thereby
US8916010B2 (en) 2007-12-07 2014-12-23 The Boeing Company Composite manufacturing method
US9764499B2 (en) 2007-12-07 2017-09-19 The Boeing Company Structures using composite modules and structures made thereby
US8333864B2 (en) 2008-09-30 2012-12-18 The Boeing Company Compaction of prepreg plies on composite laminate structures
US8613301B2 (en) 2008-09-30 2013-12-24 The Boeing Company Compaction of prepreg plies on composite laminate structures
US20100078126A1 (en) * 2008-09-30 2010-04-01 The Boeing Company Compaction of Prepreg Plies on Composite Laminate Structures
US20100220182A1 (en) * 2009-02-27 2010-09-02 General Electric Company System and method for adjusting engine parameters based on flame visualization
US8432440B2 (en) 2009-02-27 2013-04-30 General Electric Company System and method for adjusting engine parameters based on flame visualization
US8707766B2 (en) 2010-04-21 2014-04-29 The Boeing Company Leak detection in vacuum bags

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Publication number Publication date
DE2262882A1 (de) 1973-07-12
JPS4878926A (de) 1973-10-23

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