US2436259A - Electric lamp base - Google Patents

Electric lamp base Download PDF

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Publication number
US2436259A
US2436259A US652943A US65294346A US2436259A US 2436259 A US2436259 A US 2436259A US 652943 A US652943 A US 652943A US 65294346 A US65294346 A US 65294346A US 2436259 A US2436259 A US 2436259A
Authority
US
United States
Prior art keywords
prongs
cap
neck
terminals
base
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
US652943A
Other languages
English (en)
Inventor
Lawrence R Keiffer
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 BE476605D priority Critical patent/BE476605A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US652943A priority patent/US2436259A/en
Application granted granted Critical
Publication of US2436259A publication Critical patent/US2436259A/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

Definitions

  • Suchcommercial lamps and the sockets therefor require a space of at least six inches in depth for proper mounting. In many lighting installations it is inconvenient and many times impossible to provide a space of such depth for the lamps. This is particularly true in lighting installations comprising fluorescent lamps mounted close to the ceiling for providing general illumination and in which spot lights are desirable for providing a higher level of illumination on localized areas, such as display counters. Frequently, in such installations, the spotlight must be either recessed 3 into the ceiling or be allowed to extend below the fluorescent lamps.
  • the principal object of my invention is to provide a base for lamps of the above type which is shorter in length than the present bases.
  • Another object of my invention is to provide a lamp of the above type which is shorter than the present lamps.
  • Fig. 4 is a side elevational view of the neck and the base with part of the base shell'cut away and Fig. 5 is a front elevational view of another species of base of my invention.
  • the glass bulb of the lamp is shown at I and the base at 2.
  • the base 2 comprises a cup-shaped metal cap 3 which engages the outer surface 4 0f the thick neck 5 of the glass bulb l and is firmly held thereon by at least two indented parts 6 which are 180 degrees apart and engage similarly spaced in dentations l in the outer surface 4 of the neck 5.
  • a pair of contact prongs 8 extend outward through an opening 9 in the side of the cap and at right angles to the axis of the lamp for engagement with a suitable socket (not shown) which may be of conventional structure to accommodate the base prongs 8.
  • the base also comprises a thin, flat electrically insulating piece l0 which rests on the flat end wall H of the neck 5 and extends outward through the opening 9 to electrically insulate the prongs 8 from the cap 3.
  • the spacer l2 and the piece l0 form an electric insulator which rests on the wall ll of neck 5 and insulates the prongs 8 from the cap 3.
  • the prongs 8 have semi-circular depressions, or notches M which are engaged by transverse pro jections or ridges l5 (Figs. 2' and 4) at the bottom of the slots l3 in the spacer l2 to prevent movement of the prongs 8 along the slots I3 .when the prongs are inserted or removed from a socket. As best shown in Figs.
  • the portions i8 of the prongs 8 adiacent their inner ends are curved to extend beyond the cups I8 (Figs. 3 and 4) and have ears. 28 which are pierced as shown at 2
  • the cups i8 and the leadingin wires 22 constitute spaced electric terminals secured to the neck 8 and extending parallel to the axis of the reflector portion oi the bulb l.
  • the wires 22 supp r the light emitting filament (not shown) in the bulb and maybe fastened, as by spot welding or soldering. to the ears 20 to electrically connect the prongs 8 with the filament.
  • prongs 8 are held stationary by the lamp members described above there is no physical force exerted on the connection between the prongs 8 and the wires 22 when the prongs 8 are moved into and out of a socket and the wires 22 thus may be fastened directly to the prongs 8 and the ears III omlttedii desired.
  • the base 2 maybe mounted on the lamp by placing the insulating piece II on the flat end surtace ll of the neck portion 8, the prongs 8 may then be placed on the insulating piece l8 with the wires 22 passing through the holes 2i in the cars 28.
  • the spacer i2 is then placed over the prongs 8 and the wires 22 may then be welded to the upper surfaces of the ears 28.
  • the cap 8 is then placed on the bulb I with the opening 8 in registry with portions of the prongs 8. the spacer l2 and the insulating piece l8 which protrude beyond the side surface 8 of the neck 8.
  • the slightly iiared rim 28 of the cap 8 is then forced down over the slightly tapered outer surface 8 of the neck 8 to make a press flt therewith and until it enga es the shoulders 28 on the bulb l.
  • the closed end of the cap 8 is spaced suiilciently from the cars 28 to avoid short-circuiting or the prongs 8 and engages the top of spacer l2 to clamp the latter to the neck 8.
  • the cap 8 may then be indented as shown at 8 to engage the indentations I provided in the side surface lof the neck 8 to secure the assembled base 2 firmly tothe bulb I.
  • the cap 8 has a pair of diametrically opposed longitudinally extending slits 28 which facilitate placing the cap on the neck 8.
  • the thin insulating piece ill socket supported by the lamp. or the lamps may be supported by a socket engaging both the cap 8 and the prongs 8 or the prongs 8 alone.
  • the prongs 8 and the spacer l2 rest directly on the flat surface Ii of the glass neck 8 and the bottom edge of the opening 28 is spaced a greater distance from the prongs 8. While the bottom edge may be straight, I prefer to provide two semi-circular notches 21 opposite the prongs 8. I!
  • a projector lamp comprising a bulb having a light concentrating reflector portion with a short neck portion at the apex thereof and a base on said bulb neck comprising a comparatively shallow shell portion having contact prongs projecting therefrom transversely to the axis of said reflector portion to minimize the axial dimensions of said lamp.
  • a projector lamp comprising a bulb having a light concentrating reflector portion and a base attached to the apex of said bulb portion comprising a shallow cylindrical cap having contact prongs projecting therefrom transversely to the axis of said reflector portion to minimize the axial dimensions of said lamp.
  • an electrical device comprising a bulb having a'relatively heavy glass neck with spaced electric terminals externally protruding therefrom, a base comprising a metal cap enclosing said terminals with its rim secured to and surrounding said neck, contact prongs electrically connected .to said terminals and projecting through an opening in the side of said cap for connecting said terminals to socket contacts for said device and an electrical insulator member having spaced slots accommodating and engag ing said prongs and being interposed between said cap and said prongs and clamped against said terminals and said neck by said cap to hold said prongs in fixed position on said device.
  • an electrical device comprising a bulb having a relatively heavy glass neck with spaced electric terminals externally protruding there from, a base comprising a metal cap enclosing said terminals with its rim secured to and surrrounding-said neck, contact prongs electrically connected to said terminals and projecting; through an opening in the side of said cap ior connecting said terminals to socket contacts for said device and an electrical insulator member having spaced slots accommodating and engaging said prongs with projections in said slots engaging depressions in said prongs and being interposed between said cap and said prongs and clamped against said terminals and said neck by said cap to hold said prongs in fixed position on said device.
  • a short base for an electric device having externally protruding electric terminals on a glass neck portion comprising a cup-shaped metal cap for engaging said neck portion and enclosing said terminals, contact prongs extending through an opening in the cylindrical side wall of said cap for connecting said terminals to socket contacts for said device and an insulator member having spaced slots accommodating said prongs and being interposed between said cap and said prongs and clamped against said terminals and said neck by said cap to hold said prongs in fixed position on the device.
  • a short base for an electric device having externally protruding electric terminals on a glass neck portion comprising a cup-shaped metal cap for engaging said neck portion and enclosing said terminals, contact prongs extending through an opening in the cylindrical side wall of said cap for connecting said terminals to socket contacts for said device and an insulator member having spaced slots accommodating said prongs with projections in said slots engaging depressions in said prongs and being interposed between said cap and said prongs and clamped against said terminals and said neck by said cap to hold said prongs in fixed position on the device.
  • an electric lamp comprising a bulb having a light concentrating reflector portion and a relatively heavy glass neck in back oi the reflector portion with spaced electric terminals externally protruding therefrom parallel to the axis of the reflector portion, a base comprising a metal cap enclosing said terminals with its rim secured to and surrounding said neck, spaced electric contact prongs electrically connected to said terminals, and projecting transversely of the reflector axis through an opening in the side or said cap for connecting said terminals to socket contacts for said lamp and an electrical insulator member engaging said prongs and being clamped between said cap, said terminals and said neck to hold said prongs in ilxed position on said bulb.
  • an electric lamp comprising a bulb having a light concentrating reflector portion and spaced electric terminals externally protruding from said portion and parallel to the axis thereof, a base 2 comprising a metal cap enclosing said terminals and attached to said Portion. spaced contact prongs electrically connected to said terminals and projecting transversely of the reflector axis through an opening in the side of said cap for connecting said terminals to socket contacts for 30 228.95
  • said lamp and an electrical insulator member engaging said prongs and being clamped between said cap and said bulb to hold said prongs in fixed position on said bulb.
  • an electric lamp comprising a bulb having a light concentrating reflector portion and spaced electric terminals externally protruding irom said portion and parallel to the axis thereof, a base comprising a hollow member enclosing said terminals and attached to said portion and spaced contact prongs electrically connected to said terminals and projecting from the side or the base transversely or the reflector axis for connecting said terminals to socket contacts for said lamp.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
US652943A 1946-03-08 1946-03-08 Electric lamp base Expired - Lifetime US2436259A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE476605D BE476605A (en(2012)) 1946-03-08
US652943A US2436259A (en) 1946-03-08 1946-03-08 Electric lamp base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US652943A US2436259A (en) 1946-03-08 1946-03-08 Electric lamp base

Publications (1)

Publication Number Publication Date
US2436259A true US2436259A (en) 1948-02-17

Family

ID=24618853

Family Applications (1)

Application Number Title Priority Date Filing Date
US652943A Expired - Lifetime US2436259A (en) 1946-03-08 1946-03-08 Electric lamp base

Country Status (2)

Country Link
US (1) US2436259A (en(2012))
BE (1) BE476605A (en(2012))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508063A (en) * 1949-12-28 1950-05-16 Henry R Gross Farm light
US3852631A (en) * 1973-08-20 1974-12-03 Gen Electric Incandescent lamp and base
US3875628A (en) * 1973-08-20 1975-04-08 Gen Electric Method of assembling a lamp and base
USD280935S (en) 1983-10-20 1985-10-08 Alcorn Denys L Fluorescent reflector fixture
US4804878A (en) * 1987-02-05 1989-02-14 Gte Products Corporation Electric lamp, base for use therewith and method of assembling same
US5222803A (en) * 1989-12-01 1993-06-29 Trw United Carr Gmbh & Co. Lamp holder or socket to receive an incandescent lamp bulb

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE228950C (en(2012)) *
US1712027A (en) * 1921-05-03 1929-05-07 Cooke Patents Inc Light-projecting device
US2071948A (en) * 1932-08-20 1937-02-23 Gen Electric Illuminating device
US2252476A (en) * 1940-11-29 1941-08-12 Gen Electric Base for electric lamps

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE228950C (en(2012)) *
US1712027A (en) * 1921-05-03 1929-05-07 Cooke Patents Inc Light-projecting device
US2071948A (en) * 1932-08-20 1937-02-23 Gen Electric Illuminating device
US2252476A (en) * 1940-11-29 1941-08-12 Gen Electric Base for electric lamps

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508063A (en) * 1949-12-28 1950-05-16 Henry R Gross Farm light
US3852631A (en) * 1973-08-20 1974-12-03 Gen Electric Incandescent lamp and base
US3875628A (en) * 1973-08-20 1975-04-08 Gen Electric Method of assembling a lamp and base
USD280935S (en) 1983-10-20 1985-10-08 Alcorn Denys L Fluorescent reflector fixture
US4804878A (en) * 1987-02-05 1989-02-14 Gte Products Corporation Electric lamp, base for use therewith and method of assembling same
US5222803A (en) * 1989-12-01 1993-06-29 Trw United Carr Gmbh & Co. Lamp holder or socket to receive an incandescent lamp bulb

Also Published As

Publication number Publication date
BE476605A (en(2012))

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