US3327283A - Photoflash lamp - Google Patents

Photoflash lamp Download PDF

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Publication number
US3327283A
US3327283A US438328A US43832865A US3327283A US 3327283 A US3327283 A US 3327283A US 438328 A US438328 A US 438328A US 43832865 A US43832865 A US 43832865A US 3327283 A US3327283 A US 3327283A
Authority
US
United States
Prior art keywords
base
wires
lead
lamp
cap
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
US438328A
Other languages
English (en)
Inventor
Lester F Anderson
William C Fink
Donald H Pfefferle
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products 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
Application filed by Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Priority to US438328A priority Critical patent/US3327283A/en
Priority to BE677520D priority patent/BE677520A/xx
Priority to GB10171/66A priority patent/GB1081215A/en
Priority to DES56083U priority patent/DE1939955U/de
Application granted granted Critical
Publication of US3327283A publication Critical patent/US3327283A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/44—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp directly applied to, or forming part of, the vessel
    • 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

Definitions

  • This invention relates to the manufacture of photoflash lamps and more particularly to photofiash lamps of the so-called subminiatu-re type, i.e., having a volume of about l ml. or less.
  • each decrease in the overall size of the lamp envelope is usually accomplished by an increase in the concentration of the combustible and an increase in the pressure of the combustion-supporting gas.
  • the pressed glass base of the PF-l is characterized by a protuberance or tip which provides a suitable bearing surface for the application of a force thereagainst to facilitate ejection of a spent lamp from its socket or receptacle in associated photographic equipment.
  • Much of the photographic equipment in Europe is designed to receive a PF-l lamp and is provided with ejection means operable in combination with the protu'berance or tip which characterizes the pressed glass base.
  • the pressed glass base of the AG1 is not provided with a protuberance or tip of the type with which the PF-1 is provided and thus it cannot be employed in photographic equipment designed to receive the PF-l. Since, in certain applications, the AG1 is a significantly better light source than the PF4, there is a substantial need and market for a photoflash lamp possessing the desirable AG1 characteristics and capable of being used in photographic equipment designed to receive the PF-l. This invention is concerned with providing such a lamp.
  • a lamp which has already been suggested for this purpose is characterized by a glass arbor projecting and depending from the bottom of the pressed glass base of an AG1. Effectuation of this structural change in an AG1 adds significantly to the time and cost yof the manufacturing operation because it involves the application of highly skilled glass Working techniques to insure the production of a product of reasonably high quality.
  • the principal object of this invention is to provide a photofiash lamp which possesses the desirable characteristics of an AG1 type photofiash lamp and is capable of being used in photographic equipment designed to receive a PF-l type photoflash lamp.
  • Another object of this invention is to provide such a lamp, the manufacture of which will require a minimum number of relatively mino-r changes in existing AG1 manufacturing equipment.
  • an AG1 type photofiash lamp with a plastic cap of sufficient flexibility so that a snap-on fit on ICC the pressed glass base can be effected.
  • a conventional commercial AG1 need 'be modified only by folding the lead-in wires extending therefrom up along the ends of the pressed glass base rather than shaping them into loops and pressing them against the sides of the pressed glass base as is normally done.
  • the portions of the plastic cap which overlies the ends of the pressed glass base are cut away to expose segments of the lead-in wires so that electrical contact can be made therewith in a socket or receptacle of the photographic equipment with which the lamp is to be employed.
  • the bottom of the plastic cap is provided with a depending, substantially cylindrical projection for facilitating the ejection of a spent lamp from the photographic equipment.
  • FIGURE 1 is an exploded perspective view of a specific embodiment of a photoflash lamp and a plastic cap therefor in accordance with this invention.
  • FIGURE 2 is a perspective View of the lamp-cap assembly of FIGURE l in a completely assembled state.
  • FIGURE 3 is a fragmentary sectional view of the assembled lamp and cap of FIG. 2, taken along the lines 3-3 thereof.
  • lamp 1 comprises an hermetically sealed envelope 2 characterized by an exhaust tip 4 at one end thereof and a pressed glass base 6 having transverse grooves 7 formed therein at the other end thereof.
  • Lead-in wires 8 and 10 are sealed in the base 6 intermediate their ends, the outer ends defining electrical contacts as will be described more fully below and the inner ends supporting an ignition system not shown.
  • the ignition system comprises the usual filament bridging the lead-in wires near the inner ends thereof and beads of igniter on the inner ends of the lead-in wires.
  • the envelope 2 is provided with a filling of combustion-supporting gas, such as oxygen for example, at a pressure 0f several atmospheres, and a body of combustible 12 such as shredded zirconium foil for example.
  • the base 6 of the lamp 1 is provided with a plastic cap 14 of polyethylene, polypropylene, polyvinylchloride or the like, characterized by a flexibility sufficient to provide a snap-0n fit.
  • the cap 14 is characterized by a body member 16, somewhat oblong in shape, a collar 18 about the upper portion of the body member, and a substantially cylindrical projection defining a pin 2t) depending from the bottom of the body member.
  • the sides of the body member 16 are provided with flats 16a and the ends are provided with elongated slots 16b.
  • the inner faces of the sides of the body member 16 are provided with transverse projections or ridges 16C.
  • each of the lead-in wires 8 and 10 is bent back along the adjacent end of the pressed glass 'base 6 of the lamp.
  • the cap 14 is then slipped over the base 6 with the lead-in wires 8 and 10 so disposed, until the components are united as shown in FIGS. 2 and 3.
  • segments of the lead-in wires 8 and 10 lie within the elongated slots 161: in the ends of the body member of the cap.
  • These exposed segments of lead-in wires 8 and 10 define electrical contacts for engagement with suitable cooperating electrical contacts in the photographic equipment with which the capped lamp is designed to be employed. As shown in FIG.
  • the lead-in wires 8 and 10 are snugly retained against the neck of the lamp envelope 2 by the collar 18 of the cap 14.
  • the ridges 16C on the inner faces of the sides of the body member 16 snap into the transverse grooves 7 formed on opposite sides of the pressed glass base, thus securing the cap to the lamp.
  • the substantially cylindrical projection depending from the bottom of the body member 16 of the cap 14 defines an ejection pin 20. Actuation of a suitable mechanism, within the photographic equipment with which the capped lamp is employed, effects the application of a force on the end of the pin 20 suflicient to dislodge the capped lamp from its socket or receptacle in the photographic equipment. This operation is performed to effect the discharge of a spent lamp.
  • a photofiash lamp comprising:
  • terminal press defining a base at one end thereof;
  • ternal press defining a base at one end thereof:
  • a photofiash lamp comprising:
  • an hermetically sealed glass envelope having an external press defining a base at one end thereof;
  • said cap having a collar engaging said lead-in wires near the free ends thereof and securely retaining said lead-in wires against the neck of said enevelope, said cap also having a pair of elongated slots formed therein, said slots being in register with said lead-in wires, whereby the segments of said lead-in wires so exposed define electrical contact members.
  • a photoffash lamp comprising:
  • an hermetically sealed glass envelope having an external press defining a base at one end thereof;
  • said cap having a pair of elongated slots formed therein, said slots being in register with said lead-in wires, whereby the segments of said lead-in wires so exposed define electrical contact members, and said cap also having a pin depending from the bottom thereof.
  • a photoash lamp comprising:
  • an hermetically sealed glass envelope having an external press defining a base at one end thereof;
  • said cap also having a pair of elongated slots formed therein, said slots being in register with said lead-in wires, whereby the segments of said lead-in wires so exposed define electrical contact members, and said cap also having a pin depending from the bottom thereof.
  • a photoffash lamp comprising:
  • an hermetically sealed glass envelope having an external press defining a base at one end thereof, said base having transverse grooves formed in opposite sides thereof;
  • said cap having a pair of elongated slots formed in the ends thereof, said slots being in register with said lead-in wires, whereby the segments of said lead-in wires so exposed define electrical contact members, and said cap also having transverse ridges formed on the inner faces of the sides thereof, said ridges interlocking with said grooves in said base to thereby retain said cap on said enevelope.
  • a photollash larnp comprising:
  • an hermetically sealed glass envelope having an external press defining a base at one end thereof, said base having transverse grooves formed in opposite sides thereof;
  • said cap having a collar engaging said lead-in wires near the free ends thereof and securely retaining said lead-in wires against the neck of said envelope, said cap also having a pair of elongated slots formed in the ends thereof, said slots being in register with said leadin wires, whereby the segments of said lead-in wires so exposed define electrical contact members, and said cap also having transverse ridges formed on the inner faces of the sides thereof, said ridges interlocking with said grooves in said base to thereby retain said cap on said envelope.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
US438328A 1965-03-09 1965-03-09 Photoflash lamp Expired - Lifetime US3327283A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US438328A US3327283A (en) 1965-03-09 1965-03-09 Photoflash lamp
BE677520D BE677520A (instruction) 1965-03-09 1966-03-08
GB10171/66A GB1081215A (en) 1965-03-09 1966-03-08 Photoflash lamp
DES56083U DE1939955U (de) 1965-03-09 1966-03-08 Blitzlampe.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US438328A US3327283A (en) 1965-03-09 1965-03-09 Photoflash lamp

Publications (1)

Publication Number Publication Date
US3327283A true US3327283A (en) 1967-06-20

Family

ID=23740223

Family Applications (1)

Application Number Title Priority Date Filing Date
US438328A Expired - Lifetime US3327283A (en) 1965-03-09 1965-03-09 Photoflash lamp

Country Status (4)

Country Link
US (1) US3327283A (instruction)
BE (1) BE677520A (instruction)
DE (1) DE1939955U (instruction)
GB (1) GB1081215A (instruction)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469140A (en) * 1967-02-13 1969-09-23 Westinghouse Electric Corp Single-ended electric incandescent lamp with improved base and terminal structure,and method of assembly
US3500105A (en) * 1968-02-19 1970-03-10 Sylvania Electric Prod Incandescent lamp having a ceramic screw type base
US3548243A (en) * 1967-06-26 1970-12-15 Dino Magherini Electric light bulb and terminal cap assembly
US3876896A (en) * 1973-01-31 1975-04-08 Albrecht Kg W Subminiature incandescent bulb with lateral contact elements
US3898506A (en) * 1969-05-23 1975-08-05 Thorn Electrical Ind Ltd Incandescent filament lamps
USD290110S (en) 1985-04-12 1987-06-02 Gte Products Corporation Adaptor base for fluorescent lamp or the like

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2053138A (en) * 1935-06-20 1936-09-01 Gen Electric Miniature incandescent lamp
US2984813A (en) * 1960-07-14 1961-05-16 Frankel Associates Inc Lamp socket electrical connection
US3184584A (en) * 1962-08-29 1965-05-18 Eastman Kodak Co Photographic flash unit
GB995324A (en) * 1963-03-14 1965-06-16 Amp Inc Improvements in or relating to baseless electric lamps and housings for such lamps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2053138A (en) * 1935-06-20 1936-09-01 Gen Electric Miniature incandescent lamp
US2984813A (en) * 1960-07-14 1961-05-16 Frankel Associates Inc Lamp socket electrical connection
US3184584A (en) * 1962-08-29 1965-05-18 Eastman Kodak Co Photographic flash unit
GB995324A (en) * 1963-03-14 1965-06-16 Amp Inc Improvements in or relating to baseless electric lamps and housings for such lamps

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469140A (en) * 1967-02-13 1969-09-23 Westinghouse Electric Corp Single-ended electric incandescent lamp with improved base and terminal structure,and method of assembly
US3548243A (en) * 1967-06-26 1970-12-15 Dino Magherini Electric light bulb and terminal cap assembly
US3500105A (en) * 1968-02-19 1970-03-10 Sylvania Electric Prod Incandescent lamp having a ceramic screw type base
US3898506A (en) * 1969-05-23 1975-08-05 Thorn Electrical Ind Ltd Incandescent filament lamps
US3876896A (en) * 1973-01-31 1975-04-08 Albrecht Kg W Subminiature incandescent bulb with lateral contact elements
USD290110S (en) 1985-04-12 1987-06-02 Gte Products Corporation Adaptor base for fluorescent lamp or the like

Also Published As

Publication number Publication date
BE677520A (instruction) 1966-08-01
DE1939955U (de) 1966-06-02
GB1081215A (en) 1967-08-31

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