US2158849A - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
US2158849A
US2158849A US3334A US333435A US2158849A US 2158849 A US2158849 A US 2158849A US 3334 A US3334 A US 3334A US 333435 A US333435 A US 333435A US 2158849 A US2158849 A US 2158849A
Authority
US
United States
Prior art keywords
disc
lamp
holder
cavity
socket
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
US3334A
Other languages
English (en)
Inventor
Harold D Blake
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
Priority to BE402725D priority Critical patent/BE402725A/fr
Priority to BE413467D priority patent/BE413467A/xx
Priority to NL41269D priority patent/NL41269C/xx
Priority to NL46331D priority patent/NL46331C/xx
Priority to US667011A priority patent/US2032791A/en
Priority to DEP68602D priority patent/DE605933C/de
Priority to FR771919D priority patent/FR771919A/fr
Priority to GB11696/34A priority patent/GB428414A/en
Priority to US2397A priority patent/US2048491A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to US3334A priority patent/US2158849A/en
Priority to DEP72085D priority patent/DE673742C/de
Priority to FR800793D priority patent/FR800793A/fr
Priority to GB2321/36A priority patent/GB452191A/en
Priority to US238449A priority patent/US2200978A/en
Application granted granted Critical
Publication of US2158849A publication Critical patent/US2158849A/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
    • H01K1/46—Means 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/16—Joining of caps to vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling 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
    • H01R33/02—Single-pole devices, e.g. holder for supporting one end of a tubular incandescent or neon lamp

Definitions

  • My invention relates to electric lamps and similar devices and to holders for mounting said lamps or similar devices and conducting current to the electric energy translation element or filament thereof.
  • One of the objects of my invention is to provide an electric lamp or similar device having a base of novel and simple design together with a quickly detachable holder for engaging said base and conducting current thereto.
  • My invention may be applied to electric lamps comprising an envelope or bulb having a base at one end or to lamps of the double-ended tubular type comprising a tubular bulb having a base at each end thereof such, for example, as the type disclosed in U. S. patent application Serial No. 687,011, Paul O. Cartun, filed April 20, 1933, Patent No. 2,032,791.
  • the filament extends practically the whole length of the lamp and the tubular bulb extends unshaded substantially to the extreme ends of the lamp so that, withsuitable holders or mounting devices, a series of lamps may be mounted end to end practically without intervening structures that would interrupt the line of light.
  • considerable difficulty has been experienced in the design of a satisfactory holder for this type of lamp.
  • This difiiculty is obviated when the ends or bases of the lamp are constructed according to my invention and secured to holders also constructed in accordance with my invention.
  • the said holders occupy a minimum amount of space between the ends of adjacent lamps and afford a good, safe 'and simple means of support and electricai'connection.
  • Fig. 1 is a perspective view of an incandescent lamp comprising my invention
  • Fig. 2 is a vertical section on an enlarged scale of a portion of the lamp and a socket shown in plan view in Fig. 3, the section being taken on the line 2-1 of Fig. 3
  • Fig. 4 is a vertical section through an adapter which permits mounting the lamp in a standard screw-threaded socket
  • Fig. 5 is a plan view thereof
  • Fig. 6 is a longitudinal section of a double-ended tubular lamp comprising my invention
  • Fig. is an enlarged perspective and partial section of a holder and lamp respectively
  • Fig. 8 is an elevation, partly in section, of a series of lamps and holders of the type shown in Figs.
  • Fig. 9 is a front eletaining about twenty-nine per cent of vation of one of the holders 9.
  • socket which is shown in section;
  • Fig. 10 is a partially diagrammatic view of a series of sockets showing the electrical connections thereto;
  • Figs. 11 and 12 are front and side elevations respec- 5 tively of a modified holder;
  • Figs. 13 and 14 are a front and side view in section respectively of another modified holder;
  • Fig. 15 is a perspective view of still another modified holder.
  • the lamp bulb or envelope lli containing a filament II which has its ends secured to the inner ends of lead wires I 2, l3 and is supported at intermediate points by the ends of support wires II.
  • the opposite ends of said support wires I4 and portions 15 of the lead wires i2, i3 are sealed in a glass
  • a metal disc l6 (Fig. 2) is sealed to the edges of the opening at the end of the bulb It to constitute an end wall and contact.
  • the said disc is preferably of the general type disclosed in the Cartun application hereinbefore referred to, and consists of a metal or alloy which has a. coefficient of expansion approximating that of the glass of which the bulb is made and seals readily thereto by fusion.
  • the disc is preferably made of an iron alloy conchromium, such as an alloy marketed bythe Allegheny Steel Company as Allegheny 55.
  • the disc I6 is preferably concave or dish-shaped so that it may be made of thin material and still be adequately strong.
  • the disc i 6 has a round cavity or depression l1 at the center, preferably of an inverted conoidal form, that is, it preferably increases in diameter inward from the edge or surface of the disc, the maximum diameter of the particular design shown in Fig. 2 being at the point l8.
  • the sides of the said cavity diverge inwardly from its edge. described as a centrally located subspherical cavity with a constricted orifice.
  • the end of the lead wire i2 is formed into a loop I9 is a plane at right angles to the axis of the lamp, the said loop portion I 9 encircling the shoulder'or boss formed by the depression II.
  • the lead wire I3 extends through an exhaust opening 20 at the center of the cavity II, the said opening being sealed by a mass of glass 2
  • is formed by fusing down a portion of a glass exhaust tube which was previously fused to the disc it around the opening 20 and through which the bulb II was exhausted.
  • the cavity may also be 40 thegiassmassIl toserveinitseliasthecenter contactil'iorthe lamp,thedisc ilservingaa the other contact.
  • the said socket comprises a body portion 22 oi insulating material.
  • One oi the contacts consists oi a metal disc 22 located within the socket and secured to a terminal 22 by screws 22.
  • the center portion oi said disc 22 is iormed into a plurality (iour) oi upwardly extending resilient fingers or prongs 22 which are radially compressible.
  • the said prongs 22 are annularly disposed and extend outwardly and then inwardly so that when the lamp is inserted in the socket, the said prongs 22 are first compressed by the outer edge oi the walls oi the cavity H in the disc l2 and then snap outward into the enlarged portion of the said walls oi said cavity, similar to a glove iastener.
  • the socket also comprises a center contact consisting of a resilient metal strip 21 disposed in a hole 22 at the center oi the socket and connected to a terminal 22 by a screw 22.
  • the terminal 22 is electrically connected to the disc l2 and lead wire i2 through the disc 22 and prongs 22, while the terminal 22 is electrically connected to the lead wire i2, which itseli in this case constitutes the center contact oi the lamp, through the center contact strip 21 oi the socket.
  • Figs. 4 and 5. illustrate a screw-threaded adapter or holder which may be mounted in the conventional type oi screw-threaded sockets to permit mounting the lamp therein without replacing the sockets in existing installations.
  • said adapter comprises a cylindrical body portion 2
  • a metal contact disc 22 and an insulating disc 22 are locked between a shoulder in the said cap 22 and the body portion 2
  • the said metal disc 22 has an upstanding annular and concave lamp engagement portion 22 at the center, the said engagement portion and the major part oi the disc being divided into a plurality (five) oi segments by radial slots 21. Holes 22 are punched inthedisc22 betweenthe saidslots21 toaddto the resiliency oi the segmental engagement portion.
  • a metal contact strip 22 extends through a longitudinal slot or channel 22 in the body portion 2
  • the upper end tends laterally between the discs 22 and 22,.being in electrical contact with said disc 22.
  • the lower end of said strip 22 extends through a slot in a cup-shaped shell 2
  • the shell 2i is thereby electrically connected to the disc 22 by the'strip 22.
  • the said shell is provided with screw threads 22 for t with the screw-threaded shell oi a conventional socket.
  • Another contact strip 22 extends through a longitudinal slot 22 in the body portion 2
  • Fig. 6 illustrates a double-ended tubular incandescent lamp oi the type disclosed in the hereinbeiore-mentioned Cartun patent application. It comprises a tubular glass bulb or envelope 2
  • the discs 22, 22 are of the same type as the disc i2 in Figs. 1 and 2 except that the disc 22 is not provided with an exhaust aperture.
  • the bulb is exhausted through an aperture 22 at the center 01! the disc 22, the said aperture being sealed by a mass oi glass 22 which constitutes the residue oi an exhaust tube and is sheltered in the cavity or depression 22 at the center 01 the disc.
  • the said cavity 22 and the cavity 21 in disc 22 are oi the same design as the cavity l1 in disc i2 (Figs. 1 and 2).
  • the filament 22 extends substantially the entire length oi the bulb 2
  • the filament supporting structure may consist oi a (glass) stay rod 22, having terminal wires 22 and 2
  • are iormed into loops which engage the shoulders or bosses iormed by the cavities 21, 22.
  • the lamp is mounted on holders or mounting devices 22 (Figs. 7 to 9), the lamp-engaging portions oi which consist of resilient fingers or prongs 22 (similar to the prongs 22 in Figs. 2 and 3) which snap into the cavities 22, 21 in the discs 22 and 22, thereby drawing the said holders against the said discs and making a good electrical connection therewith.
  • the said holders 22 are iormed from sheet metal strips 21 and preierably have some iorm oi socket-engaging portion 22.
  • the said socket-engaging portion 22 is icrmed by folding back the end portion of the strip 21 at right angles to the main portion thereof.
  • the iorward edge oi this iolded portion is then split at 22 and iormed at'that point into a cylindrical protuberance 12 which engages with a contact strip 1
  • the entire holder with the exception oi the socket-engaging portion or prong 22 and the lamp-engaging prongs 22, is preierably covered or coated with an insulating material 12 which may be -sprayedormoldedthereonormaybeinthe iorm oi a cap secured thereto.
  • the holder 22 is shown in Hg. '1 before the application oi the insuiating material. lugs 12 being preierably provided to more securely hold the insulation thereon.
  • the terminal prong portion 88 of the holder 65 By forming the terminal prong portion 88 of the holder 65 so that it is in a plane at right angles to the plane of the body portion 61 and lamp engagement prongs 66, it lies substantially in the plane through the longitudinal axis of the lamp or parallel thereto so that the terminal strips II or the sockets may be made a little wider than the distance between the opposite edges of the adjacent terminal prongs 68, thereby leaving some room for small variations in the lengths of the lamps
  • may be mounted by first attaching the holders 65 to the ends thereof and then grasping the bulb 5
  • Figs. 11 and 12 illustrate a holder having lampengagement fingers or prongs I5 similar to the prongs 66 oi! the holder 65, but the socket-em gagement portion or prong 16 has turned-up edges 11.
  • the said edges 11 may constitute the socket terminal engagement portions so that this holder 1 is also adjustable in the socket longitudinally of terminal of a socket.
  • the said edges 11 may be provided with protuberances 11' or indentations for engagement with coacting indentations or protuberances in the socket terminals.
  • the rim 19 of the body portion 88 of the holder may also be turned up to form a securing or anchoring means for an insulating cap or coating (not shown).
  • Figs. 13 and 14 illustrate another modified holder in which the lamp base engagement prongs or segments 8
  • a holder with prongs of this type could not be used withthe disc 53 in Fig. 6 because of the presence of the glass mass 55 unless the cavity 56 were made sufliciently deep.
  • -it could also be used on either end'of the lamp if the said glass mass were eliminated from the outside of the disc and the lamp exhausted in some other manner, for example through the side wall of the bulb 5
  • the socket-engaging prong portion 82 of the holder may be provided with a protuberance 83 for engagement with the The circular body portion 84.
  • an insulating cap 85 which may be made of a molded composition and has a projecting rim or edge portion 86 which surrounds the end of the lamp 5
  • Fig. illustrates still another modified holder in which the lamp base engagement portion consists of a resilient split ring 81 extending outward from the body portion 88 and preferably increasing in diameter toward its outer edge so that it will snap into the cavity 56, or 51 of the discs 58, 52.
  • the socket-engaging portion consists of a prong 88 extending from the body portion 88 and may have a hole 88 therein for engagement with a protuberance on a socket terminal member.
  • An electric lamp comprising a tubular glass envelope having a metal disc sealed directly to the edges of the opening at each end thereof, each of said discs having a round cavity therein for engagement with a holder, said cavity forming a boss at the inside of thedisc, a filament extending longitudinally through the envelope from end to end thereof and electrically connected at each end to one of said discs, and a support structure for said filament comprising a stay member extending longitudinally through said envelope and having wire end portions looped around the said bosses on said discs, and support wires spaced along and extending from said stay member and engaging said filament.
  • an electric lamp comprising a glass envelope having a flattened end wall comprising a metal disc sealed to and forming a part of said envelope, said disc having a cavity therein with a constricted orifice and adapted for engagement with radially compressible spring fingers of aholder.
  • an electric lamp comprising a glass envelope having a flattened end 'wall comprising a metal disc sealed to and forming a part of said envelope, said disc forming a contact and having a cavity therein with a constricted orifice and adapted for engagement with radially compressible spring fingers of a holder.
  • an electric lamp comprising a tubular glass envelope having a fiattened end wall at each endthereof comprising a metal disc sealed to and forming a part of said envelope, each of said discs forming a contact and having a cavity therein with a constricted orifice and adapted for engagement with radially compressible spring fingers of a holder.
  • an electric lamp comprising a glass envelope having a flattened end wall comprising a metal disc sealed to and forming a part of said envelope, said disc having a cavity therein with a constricted orifice and constituting a contact for said lamp, a second contact member extending through a seal in the center of said disc and insulated therefrom, a holder comprising a sheet metal member having annularly disposed radially compressible spring fingers extending outward from a face thereof, said fingers being compressed by said orifice of said disc cavity upon insertion therein and then snapping outward within said cavity to draw said sheet metal member and disc together, a contact disposed at the center of said spring fingers and insulated therefrom and engaging the said second contact extending through said disc.
  • an eiectriclamp comprising a tubular glass envelope having a flattened end wall at each end thereof comprising a metal disc sealed to and forming a part of said envelope, each of said discs having a cavity therein with a constricted orifice, and a holder comprising a sheet metal member adapted to copperate with each end 0! said tubular glass envelope, each or said sheet metal members having annularly disposed radially compressible spring nngers extending outward from the face thereof, said fingers being compressed by the constricted orifice oi the cooperating disc cavity upon insertion therein and then snapping outward within said cavity to draw said sheet metal member and disc toiether.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US3334A 1933-04-20 1935-01-24 Electric lamp Expired - Lifetime US2158849A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
BE402725D BE402725A (xx) 1935-01-24
BE413467D BE413467A (xx) 1935-01-24
NL41269D NL41269C (xx) 1935-01-24
NL46331D NL46331C (xx) 1935-01-24
US667011A US2032791A (en) 1933-04-20 1933-04-20 Tubular and other incandescent lamps and their manufacture
DEP68602D DE605933C (de) 1933-04-20 1933-12-08 Elektrische Gluehlampe in Roehrenform
FR771919D FR771919A (fr) 1933-04-20 1934-04-17 Lampes à incandescence tubulaires et procédés de fabrication
GB11696/34A GB428414A (en) 1933-04-20 1934-04-18 Improvements in and relating to electric incandescent lamps
US2397A US2048491A (en) 1935-01-18 1935-01-18 Electric lamp
US3334A US2158849A (en) 1935-01-24 1935-01-24 Electric lamp
DEP72085D DE673742C (de) 1935-01-24 1935-11-07 Elektrische Gluehlampe in Roehrenform
FR800793D FR800793A (fr) 1935-01-24 1936-01-17 Lampes électriques
GB2321/36A GB452191A (en) 1935-01-24 1936-01-24 Improvements in and relating to electric lamps
US238449A US2200978A (en) 1935-01-24 1938-11-02 Lamp holder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3334A US2158849A (en) 1935-01-24 1935-01-24 Electric lamp

Publications (1)

Publication Number Publication Date
US2158849A true US2158849A (en) 1939-05-16

Family

ID=21705330

Family Applications (1)

Application Number Title Priority Date Filing Date
US3334A Expired - Lifetime US2158849A (en) 1933-04-20 1935-01-24 Electric lamp

Country Status (6)

Country Link
US (1) US2158849A (xx)
BE (2) BE413467A (xx)
DE (1) DE673742C (xx)
FR (1) FR800793A (xx)
GB (1) GB452191A (xx)
NL (2) NL46331C (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415867A (en) * 1943-10-14 1947-02-18 Gen Electric Lamp base
US2851623A (en) * 1955-04-07 1958-09-09 Frank Friesen Reimer Electric lamps

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1008828B (de) * 1955-04-22 1957-05-23 Walter Gustav Wilhelm Staecker Leuchtstofflampenarmatur zur Herstellung von Lichtbaendern
GB2307113B (en) * 1995-11-08 1999-04-28 Itt Ind Ltd Improvements in or relating to coaxial connectors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415867A (en) * 1943-10-14 1947-02-18 Gen Electric Lamp base
US2851623A (en) * 1955-04-07 1958-09-09 Frank Friesen Reimer Electric lamps

Also Published As

Publication number Publication date
BE402725A (xx)
BE413467A (xx)
FR800793A (fr) 1936-07-18
DE673742C (de) 1939-03-27
NL46331C (xx)
NL41269C (xx)
GB452191A (en) 1936-08-18

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