US3262086A - Miniature lamp and receptacle therefor - Google Patents

Miniature lamp and receptacle therefor Download PDF

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Publication number
US3262086A
US3262086A US355367A US35536764A US3262086A US 3262086 A US3262086 A US 3262086A US 355367 A US355367 A US 355367A US 35536764 A US35536764 A US 35536764A US 3262086 A US3262086 A US 3262086A
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US
United States
Prior art keywords
lamp
base
protuberance
bulb
receptacle
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
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US355367A
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English (en)
Inventor
Herrmann Karl
Ott Wolfgang
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.)
PATENT FREUHAND GES fur ELECTR
Patent-Freuhand-Gesellschaft fur Electrische Gluhlampen Mbh
Original Assignee
PATENT FREUHAND GES fur ELECTR
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
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Publication of US3262086A publication Critical patent/US3262086A/en
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Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05Two-pole devices
    • H01R33/06Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/09Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-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
    • F21K5/00Light sources using charges of combustible material, e.g. illuminating flash devices
    • F21K5/02Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B15/00Special procedures for taking photographs; Apparatus therefor
    • G03B15/02Illuminating scene
    • G03B15/03Combinations of cameras with lighting apparatus; Flash units
    • G03B15/04Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
    • G03B15/0442Constructional details of the flash apparatus; Arrangement of lamps, reflectors, or the like
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32Seals for leading-in conductors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/42Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap

Definitions

  • This invention relates to electrically operated lamps and more particularly to miniature flash lamps, being concerned primarily with the base construction and contacts and to the receptacle with which the lamp may be utilized.
  • the invention is involved with lamps having elongated tubular envelopes of small bulb volume usually in the vicinity of one cubic centimeter, and to lamps utilizing a glass base molded as an integral part with the glass bulb.
  • the known prior art lamp consists, for instance, of a nearly cylindrical appendage of the bulb somewhat flattened at sides thereof to provide two axially parallel opposite plane areas from which the current in-leads come out to be extended around the rounded parts of the base to function as the base contacts.
  • Such a base cannot be used for miniature photoaflash lamps because the hollow body forming the base represents a too great dead volume within the lamp.
  • a glass base for photo flash lamps of larger volume of well over one cubic centimeter capacity which consists of a bulb having a flattened stem from the front sides of which the current in-leads project, those in-leads then being bent around different sides of the stem press like loops.
  • Such a base has the disadvantage of the length of the stem press serving as the glass base having to be quite long and actually, in the minimum size bulbs in which it is capable of use, has a length practically equal to or perhaps exceeding the length of the bulb portion of the lamp containing the light-producing medium.
  • the present invention proposes an improved construction of flash lamp of practical character for small-volume lamps.
  • a general aspect of the invention is directed to a lamp having an integral glass base with its bulb wherein the interior volume of the lamp is not increased at all by presence of the base therewith.
  • an object of the invention is to provide a miniature photo-flash lamp having an integral glass base of extremely short length in comparison to the total length of the lamp.
  • the invention is directed to the provision of a photo-flash lamp with integral glass bulb and base, the total length whereof is essentially and little more than the length of the bulb.
  • the invention seeks and attains provision of a base of very small axial depth to perform at the same time the several functions of sealing the bulb, of providing seal for the in-leads, of securely positioning and protecting contacts for exterior electrical connections, of orienting the lamp in its introduction into a receptacle, and of providing means for retaining the lamp in a receptacle.
  • the invention accomplishes the further objective of preventing shortcircuit between the receptacle terminals when inserting the lamp into a receptacle.
  • the invention also includes provision of a receptacle of room-saving character and minimum depth for utilization of the improved lamp.
  • FIGURE 1a is a bottom end view of a flash-lamp constructed in accordance with the invention.
  • FIGURE 11 is a side elevation of the basal end of the lamp of FIG. 1a;
  • FIGURE 2 is a similar side elevation of a flash-lamp showing a modified construction of in-lead contacts
  • FIGURE 3a is a diametric and axial section of a receptacle for use with flash lamps of FIGS. 1a, 1b and 2;
  • FIGURE 3b is a top plan of said receptacle of FIG. 3a.
  • the flash-lamp comprises a hollow cylindrical glass bulb 1, which it will be understood is closed as usual at its upper end in accordance with usual practice by a domed end of glass in continuation of the glass side walls.
  • the bottom end of the bulb is sealed with a glass flare 2 which, in the completed lamp, constitutes a glass base made integral with the bulb side wall as part of the fabricating process. That process is performed in a manner which produces a circumferential bulge or annular bead 3 the maximum diameter whereof is greater than the diameter of the cylindrical bulb 1, and coaxial with said bulb.
  • Said flare after being incorporated as an integral part with said bulb and de- (fined exteriorly by said bead, comprises the base for the lamp and for the most part is solid glass, as a consequence of which it does not increase the interior golume of the lamp beyond the normal capacity of the
  • the said flare 2 is generally flat at its exterior under surface 2a except for a medial non circular protuberance 4, formed integrally therewith, of glass and projecting downwardly in a direction parallel to and including the axis 212 of the flare.
  • said protuberance 4 is shown as elongated but shorter in length than the diameter of the flare so does not extend to the periphery of the flare, said protuberance, furthermore, in cross-section being somewhat rectangular with semicylindrical ends. In a direction at right angles to the long transverse dimension of the protuberance, the same is of less width and the long side faces or flanks 4a thereof in conjunction with the generally flat surface 2a of the said flare, may be said to provide a declivity 26 at each flank of said protuberance 4 beneath tangential construction line 2d.
  • the bulb may be in the close range of seven millimeters diameter and something over two centimeters in axial length, and used therewith is a bead of about two and four-tenths millimeters axial depth and having maximum diameter of about eight millimeters.
  • the axial height or depth of the protuberance 4, and therefore the maximum depth of the associated declivities 20, might very properly be about one and a half millimeters, so that from the top of the flare 2 (where the bead 3 joins the bulb 1) to the bottom of the protuberance 4, the distance would be approximately three '2 a and nine-tenths millimeters.
  • Said base may therefore be very justifiably referred to as relatively short or squatty as compared both to its diameter and to the length of the lamp.
  • an exhaust tubulation 7 which may be metallic, extends from the interior of the bulb through the middle of the protuberance, and at proper sequence of manufacturing operations on the lamp, is sealed off in well-known manner, namely, after the lamp has gone through the exhausting and gas-filling stages. It may also be added here, that if so desired, one of the in-leads may be made tubular and used as the exhaust tubulation during manufacture of the lamp, and sealed off and then utilized as the in-lead and contact.
  • the in-leads may have a construction indicated in FIG. 2, differing from that shown in FIGS. and 1b, by provision of in-leads 8 and 9 which remain straight, but with stubby protruding ends functioning as contacts situated in the above-described declivities 2c. Otherwise the foregoing description also applies to the showing of FIG. 2, inclusive of the suggestion of possible use of one of the in-leads as an exhaust tubulation.
  • Flash devices which include mounts for flash-lamp receiving receptacles and electrical circuit closing means for controlling energy from a suitable source, such as an electrical battery, are known in the prior art for use with flash-lamps heretofore available on the market.
  • a special construction of receptacle for use in such devices is required for the flash-lamp of the present invention, and an example of a novel receptacle for this particular use is illustrated in FIGS. 3a and 3b.
  • the mount employed and designated by numeral 10a is one provided with a hole 10 of appropriate size and shape symmetrical in opposite diametric directions with respect to a central axis.
  • Two semi-circular clamping jaws 11, 12 adapted to close toward each other to provide a circular cavity therebetween coaxial with said hole 10, are mounted to slide laterally within the confines of the hole.
  • an exterior annular groove 14a in which is located an elastic retainer such as the generally annular but expandable spring 14 shown.
  • Said retainer is rendered expandable by provision of a radially outwardly directed loop 14b therein at one side and by a discontinuity at the opposite side, the discontinuity ends 140 being also projected radially outwardly.
  • Said loop 14b and ends 140 project over a part 1012 of the mount 10a and will prevent depression of the jaws 11, 1 2 when the lamp is inserted.
  • the mount may be conveniently provided with clips 20, 21 projecting inwardly over the top edges of the jaws proximate to their facing edges for retaining the jaws permanently in the hole 10 of the mount.
  • the jaws 11, 12 are provided on their inner arcuate faces each with an inwardly projecting semi-annular shoulder 13 which, when said jaws are closed together, form a complete annular shoulder coaxial to and projecting into the central cavity within the jaws.
  • the jaws are of electrically non-conductive material.
  • resilient terminals Projecting under said jaws 11 and 12 are resilient terminals, respectively 15, 16, of leaf-spring type, said terminals extending in a common diametric direction but separated from each other at their inner ends by a gap 17 commensurate with the width of the lamp protuberance 4.
  • the width of said terminals 15, 16 is adapted to prevent the said lamp protuberance 4 from being pushed down therebelow anywhere but through said gap 17, and form upper surfaces on which said protuberance may be rotated until it registers with the gap.
  • the distance in an axial direction from the under side of said shoulder 13 to the bottom plane of the jaws 11, 12 corresponds to the depth of the bulge or bead 3 of the lamp, so that when the downwardly exposed lamp contacts engage and depress the resilient terminals, said bead will be engaged under said shoulder. In that position of the lamp, the two jaws are resiliently pressed against the periphery of the base thereof rendering the shoulder 13 effective to retain the lamp from escape and maintain the in-lead contacts in resilient electrical engagement with the leaf-spring
  • limiting supports 18, 19 thereunder.
  • These said supports may conveniently be of stiffer material than the spring terminals, for example may be brass bars, and conform in width and length to the corresponding dimensions of the said terminals.
  • Each spring terminal and its contiguous limiting support 18 or 19 extend radially outwardly beyond the jaw-receiving hole 10 and are secured by rivets 10d or in other suitable manner, to the flash device mount 10a thereat.
  • Each limiting support 18, 19 has a permanent slope inwardly and downwardly with respect to its associated jaw so as to permit the desired resilient flexing of the spring terminals.
  • the protuberance 4 thereof may be longitudinally split or divided into two sections providing a valley or declivity between those sections.
  • the in-leads could then be located between the sections within that declivity and would be even more fully protected than in the herein previously described construction.
  • An electric lamp more particularly a miniature photoflash lamp, with elongated tubular bulb and molded glass flare made as the lamp base, characterized in that at the transition of molded glass base and bulb there is formed an annular shoulder, said base having a protuberance integral therewith projecting outwardly from the end surface of the base in the direction of the lamp axis, and said protuberance having a non-circular crosssection providing side flanks extending in planes chordal to the tubular configuration of the lamp and establishing a declivity bounded at one side by said flanks and at another side by said end surface of the base, and current in-leads projecting from said base at a location contiguous to said flanks of the protuberance and entirely in said de-clivity for protection thereby from damage and disruption.
  • An electric lamp as claimed in claim 1 characterized in that the outer ends of the said current in-leads are bent sharply at their exit from said base and are carried along adjacent to the end surface of the base as short stumps entirely in said declivities.
  • an electric lamp as claimed in claim 1 a flash device therefor comprising a receptacle for receiving said base of said electric lamp, said receptacle having two semi-circular clamping jaws in an elongated 'hole of said flash device, elastic means holding said jaws together but permitting lateral sepanation of the jaws for introduction of said lamp base therebetween, said jaws when closed together providing an annular shoulder and cavity at their inner sides, two electric terminal springs at the under ends of said jaws directed toward each other, said springs having a gap between opposed ends thereof with the width of said gap at least as great as the width of said protuberance of the lamp base preventing the said protuberance from being pushed down below said opposed ends except when registering lengthwise with said gap, and the distance between the annular shoulder of the clamping jaws and said terminal springs corresponding nearly References Cited by the Examiner UNITED STATES PATENTS 2,415,902 2/1947 Noel 339 X 2,602,105 7/1952 VVelch

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US355367A 1963-04-03 1964-03-27 Miniature lamp and receptacle therefor Expired - Lifetime US3262086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP31500A DE1273065B (de) 1963-04-03 1963-04-03 Elektrische Lampe

Publications (1)

Publication Number Publication Date
US3262086A true US3262086A (en) 1966-07-19

Family

ID=7372319

Family Applications (1)

Application Number Title Priority Date Filing Date
US355367A Expired - Lifetime US3262086A (en) 1963-04-03 1964-03-27 Miniature lamp and receptacle therefor

Country Status (8)

Country Link
US (1) US3262086A (zh)
AT (1) AT245365B (zh)
BE (1) BE645900A (zh)
CH (1) CH428001A (zh)
DE (1) DE1273065B (zh)
DK (1) DK111903B (zh)
GB (1) GB1012870A (zh)
NL (1) NL6403593A (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6181170U (zh) * 1984-10-31 1986-05-29

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415902A (en) * 1944-04-12 1947-02-18 Gen Electric Lamp base and holder
GB657270A (en) * 1948-11-06 1951-09-12 Emi Ltd Improvements relating to glass envelopes, especially for cathode ray tubes
US2602105A (en) * 1949-12-17 1952-07-01 Charles H Welch Battery terminal connection
US2715216A (en) * 1952-10-18 1955-08-09 Neon Products Inc Insulator and socket assembly for fluorescent tubes
US2891231A (en) * 1958-02-28 1959-06-16 Alvero C Gregson Tube socket
US2904716A (en) * 1955-11-28 1959-09-15 Gen Electric Electric incandescent lamp and method of manufacture

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1848489U (de) * 1962-03-15 Zeiss Ikon Aktiengesellschaft, Stuttgart Fassung für Blitzlampen mit Flachsockel
US1967878A (en) * 1932-10-13 1934-07-24 Gen Electric Incandescent lamp or similar device
FR913579A (fr) * 1945-08-24 1946-09-13 Auto Lampe Soc Perfectionnements aux lampes utilisées dans les systèmes optiques centrés
DE1746105U (de) * 1957-04-03 1957-06-06 Elektro Roehren G M B H Glueh- oder glimmlampe.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415902A (en) * 1944-04-12 1947-02-18 Gen Electric Lamp base and holder
GB657270A (en) * 1948-11-06 1951-09-12 Emi Ltd Improvements relating to glass envelopes, especially for cathode ray tubes
US2602105A (en) * 1949-12-17 1952-07-01 Charles H Welch Battery terminal connection
US2715216A (en) * 1952-10-18 1955-08-09 Neon Products Inc Insulator and socket assembly for fluorescent tubes
US2904716A (en) * 1955-11-28 1959-09-15 Gen Electric Electric incandescent lamp and method of manufacture
US2891231A (en) * 1958-02-28 1959-06-16 Alvero C Gregson Tube socket

Also Published As

Publication number Publication date
GB1012870A (en) 1965-12-08
BE645900A (zh) 1964-07-18
CH428001A (de) 1967-01-15
DK111903B (da) 1968-10-21
AT245365B (de) 1966-02-25
DE1273065B (de) 1968-07-18
NL6403593A (zh) 1964-10-05

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