US2802191A - Base for electric lamp - Google Patents

Base for electric lamp Download PDF

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Publication number
US2802191A
US2802191A US389011A US38901153A US2802191A US 2802191 A US2802191 A US 2802191A US 389011 A US389011 A US 389011A US 38901153 A US38901153 A US 38901153A US 2802191 A US2802191 A US 2802191A
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US
United States
Prior art keywords
base
sections
section
lamp
pins
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
US389011A
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English (en)
Inventor
Louis L Nicolaro
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US389011A priority Critical patent/US2802191A/en
Priority to DEW14948A priority patent/DE1011522B/de
Application granted granted Critical
Publication of US2802191A publication Critical patent/US2802191A/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

Definitions

  • This invention relates to bases for electric lamps, and more particularlyintended for fluorescent lamps of circular type.
  • the primary object is to simplify the construction of base and basing operations.
  • f f Y More specifically, an objective is to' avoid need for threading wires in pin holes.
  • Another. object of the invention is 'to provide a base, the sections of'whichv can beheld together by means pressed into place, thereby avoiding time consuming op- ⁇ eration of screwingtogether;
  • the invention proposes securing the lead-in wires to the pins by the same operation utilizedfor pressing the base sections together. f
  • Yet another object of the invention is to .avoidxneed for soldering the lead-in wires tothe pins. l
  • Figure 1 is a perspective View of a lamp embodying my invention
  • Figure 2 is a longitudinal section of the base and adj-acent portions ⁇ of the envelope in elevation;
  • Figures f3 and 4 are perspective views of thetwo sections ofthe base; and l Figure 5 isfa perspective view of one of the pins utilized as part of the ⁇ base assembly.
  • the reference numeral designates a lamp envelope to whi-ch a base of insulative material, identifiedl generally'by numeral 11, is applied.
  • Said base has metallic conductivepins 12 protruding therefrom for purposeof making exterior contact with the electric circuit (not shown) said pins being connected within thebase by lead-in wires 13 which are sealedl through the lamp envelope to carry the electric current to electrodes 14 within the lamp.
  • the base has an f on the envelope when assembled thereon.
  • the other section 18 of the base likewise has ledges, there identified by numeral 21, but each ledge is preferably divided'midway of its length so as to provide a recess 22 inwardly toward the partition and open toward the rim ends of the base, and, in the present showing, also open toward the dividing plane of the base sections.
  • the lamp envelope terminates with a metal header 23 nonrotatably xed on the envelope, and one at least of these headers has a linger 24 projecting therefrom in a direction enabling it to be located in one rece-ss 22 of base section 18.
  • knobs 25 are preferably integral with the base and formed as part of the insulating ⁇ material thereof.
  • Said knobs are furthermore by preference wedge or tent shape with the ridge peak thereof parallel to the partition ⁇ and to said dividing plane, sub stantially in said plane, ⁇ and arranged so the ridge peaks of each pair are aligned with'each other. These ridge peaks are located so ⁇ as to extend diametrically across the pin heads 20 mounted in the other section 17 when the two sections are assembled.
  • the Contact pins 12 are preferably all alike. comprises, as best shown in Fig. 5, a prong portion 26 at one end and a head 20 at the other end. Between the head and prong is an intermediate shank 2,7 shown of less diameter than the head and of greater diameter than the prong.
  • the shank 27 is located in the assembly within al transverse hole provided therefor through the body of the section 17, said hole being through the ledge and axially perpendicular thereto. Said shank is held within the hole by friction, cement or other suitable means, with the prong protruding exterior to the base.
  • the larger diameter of the head it provides a shoulder 28 at the junction thereof with the shank, and inthe assembled base this shoulder will engage against the adjacent portion of .the ledge and prevent the pin from any outward displacement.
  • the inner end of head 20 has a diametric V-shaped trough 29 therein substantially matching the angularity of the aforementioned knobs 25, so that when the base sections are assembled each knob will substantially fit within its respective trough. Accordingly, in making the assembly, the pins are located with the troughs of each pair in alignmentl and parallel to the partition. It also Each I 3 may be added, that the length of the pinl heads and shanks, and distance of projection of the knobs are proportioned properly to obtain a substantially nesting interfit thereof in use.
  • the respective knobs will deflect the lead-in wire to assume the angularity of the nesting trough and knob and will be clamped therebetween, thereby establishing electrical connection from the pin to said lead-in wire without'need of threading or soldering.
  • the notch 30 keeps the wires located during the assembly operation.
  • the partition functions to keep the wires confined to their respective ends of the base and prevents them from short-circuiting.
  • the two sections 17, 18 of the base are clamped together, and according to the present invention, I have found that this can be accomplished withoutneed for screwing a threaded member through said sections.
  • the section 17 having pins 12 therein is provided with a hole 31 at the diagonal center between the pins so that said hole is midway of the length of lthe partition as viewed toward the dividing plane.
  • the hole is'perpendicular to said plane and extends therefrom to the exterior of the section 17.
  • the other section 18 has a hole 32 which, when the sections are assembled, is aligned with and of matching diameter to aforementioned hole 31.
  • the hole 32 in section 18 is also perpendicular to ⁇ the dividing plane and extends within the partition toward theexterior of its section, but in this instance does not go all the way through to the exterior and may therefore be termed a blind hole.
  • Use of a blind hole has advantages not only to maintain smooth and pleasing appearance of the exposed part of the base, but prevents access thereat to the securing member located in the hole in the completed lamp.
  • Holes 31, 32 coordinate to provide a continuing cavity in the two base sections.
  • the hole 31 which extends entirely through and opens at the periphery of section 17 preferably is of uniform diameter ⁇ throughout and of a size substantially the diameter of the securing member 33 which may be inserted therein without binding. A head on the securing member will retain the section from displacement off of the said securing means.
  • the hole 32 in the other section may advantageously have a slight taper, say about two hundredths of an inch smaller diameter at its blind end than at its open end.
  • the material of which the base sections are fabricated is preferably urea formaldehyde, which is a moldable resin.
  • the distortion point of this material is in the range of 132 to 138 C., which is deemed preferable.
  • the invention may be practiced, however, with either lower or higher Vdistortion points, and in this larger operative range limits of approximately lOO-l70 C. for thc distortion point seem to apply. While the urea formaldehyde is most favorably considered, there are other materials having distortion points in the usable range which I may use if desired, such as phenol formaldehyde, melamine formaldehyde, phenol furfural, polyvinyl carbazole, furan, and others.
  • the securing member 33 is of the nature of a headed dowel the shank of which, at least near the end remote from thc head, is roughened, as by knurling, ridging, threading or otherwise producing a multiplicity of sharp projections on the surface thereof. Just as this member is about to be inserted in holes 31, 32, it is heated, as by being passed through a gas fiame, vor otherwise, so when entering and lodging in said holes it will have a tempera- Iture well above the distortion point of the material of which said sections are composed. With the urea formaldehyde, I find a temperature of 250 C. to which the securing member is heated, works very well.
  • the heat to which the securing member is raised is proportionately lower or higher respectively.
  • Such materials also appear to be advantageous because of the fact that the amount of heat applied does not melt or soften the member and its projections therefore remain intact and sharp and not only embed more readily but obtain a deeper grip into the material of the section than would occur if the projections became deteriorated by the heating of the member.
  • the base section 17 having the several contact pins 12 therein may be laid in a jig or holder with the heads of the pins upward.
  • the envelope 10 is applied upon the rim portions of the base with the lead-in wires engaging in notches 30 of the pin heads and extending across the troughs 29.
  • the other section 18 of the base 11 is then applied in position with finger 24 entering a recess 22 of said section and the knobs 25 registering above said troughs 29v of the pins.
  • Said section 18 is then pressed down to closing engagement with the under section 17 to final position which results in the knobs clamping the lead-in wires within said troughs.
  • the securing member 33 being duly heated, is pressed home in holes 31, 32 and the lamp is fully based.
  • the several operations are simple mechanical movements, and may be performed by machine, conducive to rapidity of manufacture.
  • a base for a tubular lamp of circular configuration comprising, a body of electrically non-conductive moldable material having a known heat distortion point, said body being substantially cylindrically hollow at each end and divided on an axial plane to provide a pair of matching and oppositely-disposed base sections of such length that when tightly pressed together they engagingly accommodate the end portions of said lamp, means extending through one of said base sections for interiorly receiving the end portions of the lamp lead-in wires and providing exteriorly-disposed pin connectors therefor, means carried by the other of said sections for cooperatively'depressing said lead-in wire end portions into firm electrical contact with the interiorly-disposed ends of said pin connectors when said base sections are aligned in operative relation and firmly pressed together at said plane, and press-fitting means embeddable in said moldable material for holding said sections together in tightlyclosed relation.
  • a base for a tubular lamp of circular configuration comprising, a substantially cylindrical body of electrically non-conductive moldable material having a known heat distortion point, said body being substantially cylindrically hollow at each end and divided on an axial plane to provide a pair of matching and oppositely-disposed base sections of such length that when tightly pressed together they engagingly accommodate the end portions of said lamp, one of said base sections having a hole therethrough and carrying contact pins each having an exteriorly-projecting prong end and an inner end disposed toward said plane and terminating in a head provided with a recessed end surface adapted to receive a lamp lead-in wire, the other of said base sections having a slightly-tapered blind hole therein adapted to register with the hole in the first said section when said sections are aligned in operative position, cooperating knobs car ried by the second said section and disposed to project toward said plane and nestingly engage the end surfaces of the pin heads carried by the first said section when the sections are aligned and iirmly pressed together at said plane, and a metallic
  • a base for a tubular lamp of circular configuration comprising, a body of electrically non-conductive moldable material having a known heat distortion point, said body being substantially cylindrically hollow at each end and divided on an axial plane to provide a pair of matching and oppositely-disposed base sections adapted when tightly pressed together to engagingly accommodate the end portions of said lamp, one of said base sections carrying contact pins each having an exteriorly-extending prong end and an inner end disposed toward said plane and terminating in a head having a V-shaped trough across its end surface adapted to receive a lamp lead-in wire, the other of said base sections having a plurality of integrally-formed wedge-shaped knobs disposed to register and nest with the V-shaped troughs in said pin heads in the iirst said section when the sections are aligned and firmly pressed together at said plane, and press-iitting means embeddable in said moldable material for holding said sections together in tightly-closed relation on said lamp, each of said V-shaped troughs in said pin heads

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US389011A 1953-10-29 1953-10-29 Base for electric lamp Expired - Lifetime US2802191A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US389011A US2802191A (en) 1953-10-29 1953-10-29 Base for electric lamp
DEW14948A DE1011522B (de) 1953-10-29 1954-09-22 Sockel fuer ringfoermige Leuchtroehren

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US389011A US2802191A (en) 1953-10-29 1953-10-29 Base for electric lamp

Publications (1)

Publication Number Publication Date
US2802191A true US2802191A (en) 1957-08-06

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ID=23536457

Family Applications (1)

Application Number Title Priority Date Filing Date
US389011A Expired - Lifetime US2802191A (en) 1953-10-29 1953-10-29 Base for electric lamp

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US (1) US2802191A (de)
DE (1) DE1011522B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888658A (en) * 1956-03-09 1959-05-26 Welch Thomas Ross Tube socket and envelope
US2896187A (en) * 1956-06-05 1959-07-21 Sylvania Electric Prod Lamp base
US3276014A (en) * 1963-11-29 1966-09-27 Amp Inc Housing for indicating lamp or other electrical components
US3858162A (en) * 1972-05-19 1974-12-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Snap-lock base for annular fluorescent lamps
US4002394A (en) * 1975-10-10 1977-01-11 General Electric Company Single latch snap-lock base for annular fluorescent lamps

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1142820A (en) * 1912-08-17 1915-06-15 George C Knauff Method of forming projections.
US2002291A (en) * 1929-11-26 1935-05-21 C D Wood Electric Co Inc Connecter element
US2059867A (en) * 1932-06-22 1936-11-03 Gen Electric Method of securing a metal member to a nonmetallic tubular member
US2071445A (en) * 1934-09-26 1937-02-23 Noma Electric Corp Electric lamp socket
US2083836A (en) * 1934-06-12 1937-06-15 Jr George H Glade Electrical conductor terminal device
US2328708A (en) * 1938-06-29 1943-09-07 American Optical Corp Ophthalmic mounting
US2366274A (en) * 1942-06-03 1945-01-02 Brunswick Balke Collender Co Plastic fastening means and method of applying the same
GB621307A (en) * 1947-02-15 1949-04-07 William Edwin Dunn Improvements relating to electric couplings of the plug and socket type
CH274988A (de) * 1949-10-12 1951-04-30 Mueller Ernst Kg Einrichtung zur Befestigung elektrischer Leitungen in Steckverbindungsstücken.
US2620376A (en) * 1950-07-03 1952-12-02 Gen Electric Lamp socket
US2623087A (en) * 1949-12-09 1952-12-23 Gen Electric Fabricated terminal board
US2626977A (en) * 1947-11-05 1953-01-27 Gen Electric Movable contact base
US2685107A (en) * 1951-04-09 1954-08-03 Western Electric Co Method of molding plastic articles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH5668A (de) * 1892-08-24 1893-02-15 Stearn C H Zweiteiliger Halter für elektrische Glühlampen
US2296326A (en) * 1940-06-07 1942-09-22 Robert E Barclay Socket for high voltage gaseous discharge tubes
US2392785A (en) * 1945-03-28 1946-01-08 Sylvania Electric Prod Lamp base
US2452137A (en) * 1947-04-30 1948-10-26 Murino Matthew Fluorescent lighting fixture
AT166657B (de) * 1947-10-25 1950-09-11 Lumalampan Ab Elektrische Lampe mit gebogener, röhrenförmiger Hülle

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1142820A (en) * 1912-08-17 1915-06-15 George C Knauff Method of forming projections.
US2002291A (en) * 1929-11-26 1935-05-21 C D Wood Electric Co Inc Connecter element
US2059867A (en) * 1932-06-22 1936-11-03 Gen Electric Method of securing a metal member to a nonmetallic tubular member
US2083836A (en) * 1934-06-12 1937-06-15 Jr George H Glade Electrical conductor terminal device
US2071445A (en) * 1934-09-26 1937-02-23 Noma Electric Corp Electric lamp socket
US2328708A (en) * 1938-06-29 1943-09-07 American Optical Corp Ophthalmic mounting
US2366274A (en) * 1942-06-03 1945-01-02 Brunswick Balke Collender Co Plastic fastening means and method of applying the same
GB621307A (en) * 1947-02-15 1949-04-07 William Edwin Dunn Improvements relating to electric couplings of the plug and socket type
US2626977A (en) * 1947-11-05 1953-01-27 Gen Electric Movable contact base
CH274988A (de) * 1949-10-12 1951-04-30 Mueller Ernst Kg Einrichtung zur Befestigung elektrischer Leitungen in Steckverbindungsstücken.
US2623087A (en) * 1949-12-09 1952-12-23 Gen Electric Fabricated terminal board
US2620376A (en) * 1950-07-03 1952-12-02 Gen Electric Lamp socket
US2685107A (en) * 1951-04-09 1954-08-03 Western Electric Co Method of molding plastic articles

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888658A (en) * 1956-03-09 1959-05-26 Welch Thomas Ross Tube socket and envelope
US2896187A (en) * 1956-06-05 1959-07-21 Sylvania Electric Prod Lamp base
US3276014A (en) * 1963-11-29 1966-09-27 Amp Inc Housing for indicating lamp or other electrical components
US3858162A (en) * 1972-05-19 1974-12-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Snap-lock base for annular fluorescent lamps
US4002394A (en) * 1975-10-10 1977-01-11 General Electric Company Single latch snap-lock base for annular fluorescent lamps

Also Published As

Publication number Publication date
DE1011522B (de) 1957-07-04

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