US2937308A - Electric lamps - Google Patents

Electric lamps Download PDF

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Publication number
US2937308A
US2937308A US608019A US60801956A US2937308A US 2937308 A US2937308 A US 2937308A US 608019 A US608019 A US 608019A US 60801956 A US60801956 A US 60801956A US 2937308 A US2937308 A US 2937308A
Authority
US
United States
Prior art keywords
lamp
pinch
bulb
wings
filament
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
US608019A
Other languages
English (en)
Inventor
Howles Donald Arthur
Wright John Willoughby Thomas
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 claimed from GB2565555A external-priority patent/GB797441A/en
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Application granted granted Critical
Publication of US2937308A publication Critical patent/US2937308A/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

Definitions

  • the lamps heretofore have been provided with ametal cap which is attached to the neck of the bulb by means of a cement or plaster.
  • This method of manufacture has the disadvantage that owing to the'nature of the sealing operation it is diiiicult to control the location of the filament in the. bulb and even if the filament is posi- 2,937,308 Patented May 1960 lead-in wires 2 maintained in spaced apart relationship by a vitreous bead 3.
  • the wire from which the lead wires 2 are formed is compatible with the glass of the bulb 1 and the'vitreous bead 3, that is, their relative coefficients of thermal expansion are matched to a considerable degree.
  • the filament'mount, including the lead wires 2 having U- shaped end parts, and an exhaust tube 6 are introduced into the neck portion of the bulb prior to the pinching operation for the formation of the two-wing pinch 4.
  • Fig. 1 To prevent closure of the upperend of the exhaust tube 6 during the pinching operation, we provide the tube with means represented by the shaded portion in Fig. 1 which may consist of a thin metal sleeve, a thin rod of porous material (elg. asbestos or carbon) or a zirconium dioxide powder coating.
  • the neck portion of the glass bulb 1 is formed into the flattened two-winged pinch 4 and the U-shaped end parts of the leadwires 2 are sealed through the wings of the pinch so that a pair of loops project from the bottom faces of the wings, thelead wires 2 emerging from the respective tioned correctly within the bulb, loose or faulty capping may result in the-filament being incorrectly positioned relative to the axis of the cap.
  • our invention we obviate the above disadvantage by providing a lamp which is capless and in which ,the mount structure is correctly located prior'to the'sealing operation and held firmly in that position during the time't hat the exhaust tube is being sealed'at the neck-of th'ebiilb.
  • our invention consists ,in' electricda'mp comprising a glass bulb, a flattened glass pinch sealed to close 'the bulb; the lead wires being wings of the pinch 4-at 8 and re-entering the wings 4 at gage these notches to hold the lamp in position.
  • These notches 7, instead of occupying the positions as shown may be-formed' at positions approximately midway between theroot of the bulb 1 and the bottom of the pinch 4.
  • the pinch 4 could be formed with pro-' tuberances'which are engageable by the spring contactmaking members of a spring clip holder for locating and retaining the lamp in the'holder.
  • the shaping may include suitably,
  • Figures 1 and 2 show two views of a single filament lamp constructed in accordance with the present invention
  • Figures 3, 4 and 5 show three views of a lamp similar in all respects to that shown in Figures 1 v and 2 except that it has two filaments disposed side-byside in the plane of the pinch.
  • Figures 6, 7 and 8 show three views of another double 1 filament capless lamp formed similarly with a straight ternof the single filament embodiment shown by and described with reference to Figures 1 and 2. For this reason itfis convenient to'refer to like parts by like reference numerals)
  • Thethree double filament embodiments are illustrated by w'ay -of example as being lamps each employing bow filaments of the same -L.'C.L. (light center length). It will be appreciated, however, thatthe filaments may be of any desired-form, e.g.' one filament could be'of V formation transversely-disposed with reference to an associated bow filament having a ditferent L.C.L.
  • the two bow filaments are mounted sidejby side in the plane of the two-wing pinch 4 while the lainp contacts 5 are arranged on both wings of the pinch with the contacts appertaining to a particular filament being located on the same wing.
  • the pinch is again a flattened two-winged one in the embodiment illustrated by Figures 6, 7, and 8, and the lamp contacts 5 appertaining to a particular filament are arranged on the same wing of the pinch 4, the filaments are arranged side by side so that one of the filaments lies in the plane of the pinch 4 while the other is offset therefrom.
  • Figures .9 to 11 illustrate a further double filament embodiment of the invention having a cruciform or fourwing'glass pinch whereby considerable physical stability of the lamp is achieved when. the pinch is located in a,
  • anyof the lamps described above could have portions of their contacts 5 flattened if desired, thereby further increasing the surface area of the contacts engageable by the contacts of a suitable holder.
  • the lead wires 2 emerge from the wings of the pinch 4 at 8 and re-enter these wings at points 9 spaced from the points of emergence 8, thereby anchoring both ends of the lamp contacts 5 in the body of the pinches 4.
  • the design and manufacture of the lamp according to the present invention offers several advantages among which are a shorter overall length for a given bulb size, and lower cost due to a reduction in the number of parts and steps in the process of making a complete lamp and no two-part lead.
  • contact wires are shown located one on each side of the pinch they could be spaced in any other practical position and that by using a properly designed mount and bulb a lamp of prefocused design could be made.
  • a capless electric lamp comprising a glass bulb, an external substantially solid flattened plural-winged glass pinch sealed to close said bulb and providing plane surfaces extending parallel to the axis of said lamp for 10: cating the lamp in a suitable holder, and a plurality of lead wires which emerge from said pinch after passing therethrou-gh from within said bulb and re-enter said pinch atpoints spaced from their points of emergence, the external parts of the lead-wires being in the form of flat free loops bent back against said plane surfaces of said pinch wings to provide lamp contacts whereby the substantially solid pinch provides a mechanically strong abutmentfor said contacts.
  • a ca'pless electric lamp comprising a glass bulb, an external substantially solid flattened two-winged glass pinch sealed to close said bulb and providing plane surfaces extending parallel, to the axis of said lamp for 10- cating the lamp in a suitable holder, and a plurality of lead wires which emerge from the wings of said pinch after passing therethroughfiroiri within the bulb and reenter said wings at points spaced from. their points of emergence, the external parts of the lead wires being in the form of flat free loops bent back against said' plane surfaces of said wings to provide lamp contacts whereby the substantially solid pinch provides a mechanically strong abutment for said contacts.
  • 'A capless electric lamp comprising a glas's bulb, an external substantially solid flattened two winged glass pinch sealed to close said bulb and providing plane surfaces extending parallel to the lamp axis for locating the lamp in a suitable holder, and two lead wires which emerge respectively from the wings of said pinch after passing therethrough from within the bulb and re-enter the same wings at points spaced 'from their points of emergence, the external parts of the lead wires being in the form of fiat free loops bent back against the plane surfaces of said wings to provide lamp contacts whereby the substantially solid pinch provides a mechanically strong abutment for said contacts.
  • a capless electric lamp comprising a glass-bulb, an

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US608019A 1955-09-07 1956-09-05 Electric lamps Expired - Lifetime US2937308A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2565555A GB797441A (en) 1955-09-07 1955-09-07 Improvements in and relating to electric lamps
GB21922/56A GB806666A (en) 1955-09-07 1956-07-16 Improvements in and relating to electric lamps

Publications (1)

Publication Number Publication Date
US2937308A true US2937308A (en) 1960-05-17

Family

ID=26255602

Family Applications (2)

Application Number Title Priority Date Filing Date
US608019A Expired - Lifetime US2937308A (en) 1955-09-07 1956-09-05 Electric lamps
US671359A Expired - Lifetime US2999180A (en) 1955-09-07 1957-07-11 Electric lamps

Family Applications After (1)

Application Number Title Priority Date Filing Date
US671359A Expired - Lifetime US2999180A (en) 1955-09-07 1957-07-11 Electric lamps

Country Status (6)

Country Link
US (2) US2937308A (de)
BE (2) BE559256A (de)
DE (2) DE1043502B (de)
FR (2) FR1156184A (de)
GB (1) GB806666A (de)
NL (2) NL109314C (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265923A (en) * 1963-03-19 1966-08-09 Westinghouse Electric Corp Baseless double-ended electric incandescent lamp
US3345526A (en) * 1963-04-04 1967-10-03 Ass Elect Ind Electric incandescent lamps
JPS4842783Y1 (de) * 1969-12-06 1973-12-11
US3857056A (en) * 1973-10-26 1974-12-24 Gen Motors Corp Wedge base light bulb
US3979627A (en) * 1975-04-28 1976-09-07 Gte Sylvania Incorporated Electric lamp with insulating base
US4114066A (en) * 1976-06-22 1978-09-12 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. Subminiature incandescent lamp
US4180758A (en) * 1976-10-01 1979-12-25 U.S. Philips Corporation Capless electric incandescent lamp
US5018992A (en) * 1988-05-20 1991-05-28 Gte Products Corporation Wedge lamp and clip
EP2112613A1 (de) 2008-04-24 2009-10-28 Novell, Inc. Informationskarten mit beschränkter Verwendung

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016727A (en) * 1959-04-02 1962-01-16 Gen Electric Flash lamp
GB943534A (en) * 1959-06-29 1963-12-04 Hunting Eng Ltd Improvements relating to electric lamp bulbs
US3197668A (en) * 1960-04-11 1965-07-27 John J Horan Lamp with resilient contact terminals
US3118717A (en) * 1960-04-11 1964-01-21 Horan John Joseph Elastic lamps, constructions, mountings and receptacles
US3206713A (en) * 1962-03-21 1965-09-14 John J Horan Lamp having resilient terminals
GB958350A (en) * 1963-02-18 1964-05-21 Ass Elect Ind Improvements in and relating to electric incandescent lamps
US3270237A (en) * 1963-06-26 1966-08-30 Gen Electric Electric lamp with single ended pinch seal
US3369144A (en) * 1963-12-17 1968-02-13 Rival Lamps Ltd Capless lamps
US3341803A (en) * 1964-10-28 1967-09-12 Carlos Roberto P Bustamante Combination electrical conduit and bulb socket
US3523274A (en) * 1966-09-07 1970-08-04 John J Horan Simplified lamp and structure coaction system
NL6906704A (de) * 1969-05-02 1970-11-04
GB1447764A (en) * 1972-11-09 1976-09-02 Thorn Electrical Ind Ltd Pinch-sealed electric lamps
JPS5369485A (en) * 1976-11-26 1978-06-20 Gen Electric Incandescent lamp

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US244277A (en) * 1881-07-12 maxim
US268270A (en) * 1882-11-28 Joseph v
US383675A (en) * 1888-05-29 Edward p
US2120870A (en) * 1931-11-18 1938-06-14 Gen Electric Incandescent lamp
US2156048A (en) * 1937-05-15 1939-04-25 Lorenz C Ag Electric discharge device
US2204204A (en) * 1937-05-13 1940-06-11 Lorenz C Ag Electric discharge device
US2359483A (en) * 1942-10-17 1944-10-03 Gen Electric Vitreous electrical device and its fabrication
US2542326A (en) * 1949-09-01 1951-02-20 Gen Electric Electric lamp and manufacture thereof
US2561520A (en) * 1940-03-27 1951-07-24 Hartford Nat Bank & Trust Co Vacuumtight seal for electrical apparatus and method of forming such seals
US2802133A (en) * 1952-03-28 1957-08-06 Sylvania Electric Prod Electron discharge device
US2860502A (en) * 1955-06-17 1958-11-18 Philips Corp Electric photographic flash lamp

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE616360C (de) * 1935-07-26 Radioroehrenfabrik G M B H Ham Verfahren zur Herstellung von Quetschfuessen fuer elektrische Gluehlampen und Entladungsgefaesse hoher Leistungsaufnahme
US2899671A (en) * 1959-08-11 Recessed double contact strip base
DE262287C (de) * 1912-07-17
AT127576B (de) * 1929-12-09 1932-04-11 Philips Nv Elektrische Glühlampe bzw. Entladungsröhre.
DE632921C (de) * 1932-01-19 1936-07-16 Quarzlampen Gmbh Elektrische Leuchtroehre mit die Polgefaesse umschliessenden Kappen
US2053138A (en) * 1935-06-20 1936-09-01 Gen Electric Miniature incandescent lamp
US2134472A (en) * 1936-05-09 1938-10-25 Guy N Criger Incandescent electric lamp base
US2699659A (en) * 1951-02-03 1955-01-18 Sylvania Electric Prod Photoflash lamp
GB717630A (en) * 1951-07-20 1954-10-27 British Thomson Houston Co Ltd Improvements in and relating to electric incandescent lamps
US2880349A (en) * 1954-06-17 1959-03-31 Eitelmccullough Inc Ceramic electron tube

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US244277A (en) * 1881-07-12 maxim
US268270A (en) * 1882-11-28 Joseph v
US383675A (en) * 1888-05-29 Edward p
US2120870A (en) * 1931-11-18 1938-06-14 Gen Electric Incandescent lamp
US2204204A (en) * 1937-05-13 1940-06-11 Lorenz C Ag Electric discharge device
US2156048A (en) * 1937-05-15 1939-04-25 Lorenz C Ag Electric discharge device
US2561520A (en) * 1940-03-27 1951-07-24 Hartford Nat Bank & Trust Co Vacuumtight seal for electrical apparatus and method of forming such seals
US2359483A (en) * 1942-10-17 1944-10-03 Gen Electric Vitreous electrical device and its fabrication
US2542326A (en) * 1949-09-01 1951-02-20 Gen Electric Electric lamp and manufacture thereof
US2802133A (en) * 1952-03-28 1957-08-06 Sylvania Electric Prod Electron discharge device
US2860502A (en) * 1955-06-17 1958-11-18 Philips Corp Electric photographic flash lamp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265923A (en) * 1963-03-19 1966-08-09 Westinghouse Electric Corp Baseless double-ended electric incandescent lamp
US3345526A (en) * 1963-04-04 1967-10-03 Ass Elect Ind Electric incandescent lamps
JPS4842783Y1 (de) * 1969-12-06 1973-12-11
US3857056A (en) * 1973-10-26 1974-12-24 Gen Motors Corp Wedge base light bulb
US3979627A (en) * 1975-04-28 1976-09-07 Gte Sylvania Incorporated Electric lamp with insulating base
US4114066A (en) * 1976-06-22 1978-09-12 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. Subminiature incandescent lamp
US4180758A (en) * 1976-10-01 1979-12-25 U.S. Philips Corporation Capless electric incandescent lamp
US5018992A (en) * 1988-05-20 1991-05-28 Gte Products Corporation Wedge lamp and clip
EP2112613A1 (de) 2008-04-24 2009-10-28 Novell, Inc. Informationskarten mit beschränkter Verwendung

Also Published As

Publication number Publication date
US2999180A (en) 1961-09-05
DE1062345B (de) 1959-07-30
FR71800E (fr) 1960-01-19
BE559256A (de)
GB806666A (en) 1958-12-31
FR1156184A (fr) 1958-05-13
NL105238C (de)
DE1043502B (de) 1958-11-13
BE550768A (de)
NL109314C (de)

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