US3795887A - Base for annular lamp - Google Patents

Base for annular lamp Download PDF

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Publication number
US3795887A
US3795887A US00290582A US3795887DA US3795887A US 3795887 A US3795887 A US 3795887A US 00290582 A US00290582 A US 00290582A US 3795887D A US3795887D A US 3795887DA US 3795887 A US3795887 A US 3795887A
Authority
US
United States
Prior art keywords
base
semicylindrical member
metal rods
semicylindrical
annular
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
US00290582A
Other languages
English (en)
Inventor
N Higuchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Application granted granted Critical
Publication of US3795887A publication Critical patent/US3795887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/62—Connection of wires protruding from the vessel to connectors carried by the separate part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/56—Shape of the separate part
    • H01J5/565—Bases for circular lamps

Definitions

  • a base for an annular p Comprising a p of Semi cylindrical members and base pins upstanding from 2% 8 g k one of these members.
  • Eachbase pin is provided with E 5 i 4 7 an axial slit for holding therein an external lead of a glass bulb.
  • FIG. I is a perspective view of one of a pair of semicylindrical members constituting a base for an annular lamp embodying the present invention
  • FIG. 2 is a sectional view of the base in the state in which it is mounted on an annular lamp
  • FIG. 3 is a section taken on the line II II in FIG. 3.
  • a base according to the present invention includes a pair of first semicylindrical member 3 and a second semicylindrical member 7 of material such as synthetic resin.
  • metal rods 4 of material such as brass or nickelplated brass are fixed at one end of the inner wall of the first semicylindrical member 3 although only two of them are shown in FIG. 1.
  • the metal rods 4 are circular in cross section and extend externally to the lamp to be inserted at the other end thereof in a socket (not shown) for the supply of current to the lamp therethrough.
  • An axial slit 5 extends from the top to a portion adjacent to the lower end of each metal rod 4 as seen in FIG. 1.
  • External leads 6 are connected electrically to filament coils (not shown) and are held at the end portion thereof in the respective slits 5 of the metal rods 4. Referring to FIGS.
  • the second semicylindrical member 7 is provided at its upper portion with four spaced perforations 8 whose diameter is substantially equal to the outer diameter of the metal rods 4. Therefore, when the first semicylindrical member 3 is assembled with the second semicylindrical member 7 at the gap between the opposite ends of the bulb l, the four metal rods 4 upstanding from the inner wall of the first semicylindrical member 3 fit in and extend through the four perforations 8 respectively of the second semicylindrical member 7 and these perforations 8 act to apply fastening pressure to the metal rods 4 provided with the slits 5.
  • the first and second semicylindrical members 3 and 7 may then be secured to each other as by screws.
  • the base comprising the first and second semicylindrical members 3 and 7 and the metal rods 4 is mounted on the glass bulb l in the manner described below.
  • the leads 6 are fitted in the respective slits 5 of the metal rods 4 upstanding from the inner wall of the first semicylindrical member 3, and then the second semicylindrical member 7 is mounted on the first semicylindrical member 3 while allowing the free ends of the metal rods 4 on the first semicylindrical member 3 to extend through the perfo rations 8 of the second semicylindrical member 7.
  • the leads 6 fitted in the slits 5 of the metal rods 4 are fastened by the fastening force of the metal rods 4 due to the resiliency thereof, and the slits 5 of the metal rods 4 are narrowed by the fastening effect of the perforations 8 of the second semicylindrical member 7 to prevent escapement of the leads 6 from the slits 5 of the metal rods 4.
  • the base according to the present invention may include a problem of ma]- contact since the electrical contact between the leads 6 and the metal rods 4 is attained merely by fitting the leads 6 in the slits 5 of the metal rods 4.
  • the perforations 8 in the second semicylindrical member 7 may make smaller in diameter than the outer diameter of the metal rods 4 so as to impart the fastening pressure to the metal rod 4 after assembling of the base, so that the leads 6 are secured to the metal rods 4 since the space of the slits are narrowed.
  • the inventor manufactured many bases according to the present invention and mounted these bases on glass bulbs to complete annular lamps. The results of a life test carried on the annular lamps proved that the lamps are entirely free from any mal-contact.
  • the present invention can remarkably simplify the assembling of annular lamps due to the fact that no connection step between the leads and the metal pins as by soldering or electric welding as in the prior art process is required after the assembling of the first and second cylindrical members.
  • the metal rods projecting outwardly from the base are provided with the slits, the metal rods can be easily inserted into a socket by the resiliency and a good electrical contact can also be ensured.
  • a split base for an annular lamp bulb comprising a first semicylindrical member and a second semicylindrical member adapted to hold the opposite ends of an annular bulb by bridging across the gap between such ends, and a plurality of metal rods fixed at one end thereof to the inner wall of said first semicylindrical member, said metal rods being adapted to be received through perforations formed in the side wall of said second semicylindrical member, and each said metal rod being provided with an axial slit for holding therein an external lead of said bulb.

Landscapes

  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US00290582A 1971-09-20 1972-09-20 Base for annular lamp Expired - Lifetime US3795887A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971086166U JPS4842373U (de) 1971-09-20 1971-09-20

Publications (1)

Publication Number Publication Date
US3795887A true US3795887A (en) 1974-03-05

Family

ID=13879152

Family Applications (1)

Application Number Title Priority Date Filing Date
US00290582A Expired - Lifetime US3795887A (en) 1971-09-20 1972-09-20 Base for annular lamp

Country Status (7)

Country Link
US (1) US3795887A (de)
JP (1) JPS4842373U (de)
CA (1) CA961544A (de)
DE (1) DE2245365C3 (de)
FR (1) FR2154113A5 (de)
GB (1) GB1371836A (de)
NL (1) NL151550B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163170A (en) * 1976-09-14 1979-07-31 U.S. Philips Corporation Low-pressure gas discharge lamp
US5789849A (en) * 1996-01-15 1998-08-04 Patent-Treuhand-Gesellschaft Fur Elektrische Gluehlampen Mbh Low-pressure discharge lamp with base and mount

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19817074C1 (de) * 1998-04-17 1999-10-21 Broekelmann, Jaeger & Busse Gmbh & Co Fassung für Leuchtstofflampen, insbesondere für Ringlampen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546523A (en) * 1968-12-05 1970-12-08 Sylvania Electric Prod Circular lamp base

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546523A (en) * 1968-12-05 1970-12-08 Sylvania Electric Prod Circular lamp base

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163170A (en) * 1976-09-14 1979-07-31 U.S. Philips Corporation Low-pressure gas discharge lamp
US5789849A (en) * 1996-01-15 1998-08-04 Patent-Treuhand-Gesellschaft Fur Elektrische Gluehlampen Mbh Low-pressure discharge lamp with base and mount

Also Published As

Publication number Publication date
FR2154113A5 (de) 1973-05-04
CA961544A (en) 1975-01-21
DE2245365A1 (de) 1973-03-29
NL151550B (nl) 1976-11-15
GB1371836A (en) 1974-10-30
NL7212665A (de) 1973-03-22
DE2245365B2 (de) 1974-10-03
JPS4842373U (de) 1973-05-30
DE2245365C3 (de) 1975-05-28

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