US2845107A - Lamp basing apparatus - Google Patents

Lamp basing apparatus Download PDF

Info

Publication number
US2845107A
US2845107A US399742A US39974253A US2845107A US 2845107 A US2845107 A US 2845107A US 399742 A US399742 A US 399742A US 39974253 A US39974253 A US 39974253A US 2845107 A US2845107 A US 2845107A
Authority
US
United States
Prior art keywords
base
wire
lamp
shell
bulb
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
US399742A
Other languages
English (en)
Inventor
Charles E Beck
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 GB73866D priority Critical patent/GB73866A/en
Priority to GB32102/52A priority patent/GB738666A/en
Priority to FR65261D priority patent/FR65261E/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US399742A priority patent/US2845107A/en
Application granted granted Critical
Publication of US2845107A publication Critical patent/US2845107A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/5327—Means to fasten by deforming

Definitions

  • a base for an incandescent lamp generally comprises a metal shell having its cylindrical surface threaded and an end contact or eyelet insulated from the base proper.
  • the base is applied to the neck of the bulb, that is to the constricted and generally cylindrical extension of. the main spherical portion of the bulb, and is usually cemented to it.
  • the external contact surfaces for energizing the filament of the lamp are the end contact or eyelet and the shell of the base, these being connected to the lead-in wires which project into the bulb and supportthe filament.
  • the lead-in wire which is connected to the end contact is generally known as the top lead-in wire whereas the other which is connected to the shell is generally known as the side lead-in wire.
  • My invention is more particularly concerned with a means for connecting the side lead-in wire to the shell of the base without, the use of solder. It is possible to make a contact connection by using a bulb having a full blown seal and pressing a tight fitting base on it so as to wedge the side lead-in wire between the seal shoulder and the shell of the base.
  • this solution is diflicult to realize effectively due to the manufacturing tolerances in producing the bulbs and the bases.
  • the lamp assembly preferably comprises a bulb having a full blown seal, that is, a seal which conforms closely to the inner diameter of the skirt or edge of the base over a substantial width.
  • the side lead-in wire is drawn out along the outside of the seal and passes between the seal and the shell of the base.
  • the shell is peened inwardly along a line transverse to the direction in which the lead-in wire lies, The peening effects an inward indentation in the metal of the shell which appears on its inside surface as a raised line or ridge.- This ridge traverses the lead-in wire which becomes slightly embedded in it at the crossover point, resulting in a firm electrical contact.
  • Fig. 1 is a side sectional view through the neck portion of an incandescent lamp and illustrating the manner of peening the base by means of a vibratory engraving tool;
  • Fig. 2 is a side view of the lamp seen at right angles with respect to the view of Fig. 1 and showing the line of indentation traversing the side lead-in wire;
  • Fig. 3 is a plan view of a peening mechanism operating in conjunction with a prior art type of lamp finishing machine for manufacturing electric lamps in accordance with the invention
  • Fig. 4 is a side elevation of the peening mechanism
  • Fig. 5 is a perspective view of cams for actuating the peening mechanism.
  • Fig. 1 which illustrates the fastening of the base in the case of an ordinary incandescent lamp
  • the base 1 is mounted on the constricted lower portion or neck 2 of an evacuated glass lamp bulb of which a fragment is shown at 3.
  • the bulb may be of conventional construction and containing a filament (shown in Fig. 3)
  • the base proper comprises a threaded metal shell 7, an insulating body or web 8, and an end contact 9 fastened to the upper surface thereof.
  • the insulating web 8 may be made of glass in accordance with the common practice or it may be made of a thermal setting plastic.
  • the base is fastened to the neck of the bulb by means of a cement as indicated at 10. Previous to the assembly of the base to the bulb, a quantity of cement is disposed within the base as an annular ring preferably located a slight distance inwardly from the edge or skirt Patented July 29, 1958.
  • a base having such a disposition of cement is generally termed a deep filled base and it permits maintaining the inner lower edge or skirt of the shell free and clear of cement.
  • This is particularly desirable for a lamp structure in accordance with the present invention because a contact connection is desired between the. skirt of the shell and the side lead-in wire, and the basing cement is an insulator which. would interfere with such a connection were it allowed to enter the contact region.
  • the external connections to the lamp are made through the end contact 9 and the shell 7 of the base.
  • the top lead-in wire 4 may be soldered to the end contact in the usual manner as indicated at 11.
  • the seal region of the neck comprises an end portion 12 which is generally annular and perpendicular to the axis of the bulb. Adjacent the annular PQrtion 12 is a generally cylindrical portion 13 of a diameter slightly less than the root diameter of the threads of the base in order to permit the disposition of the cement therebetween.
  • the cylindrical portion 13 merges into the main body of the neck through a shoulder including an expanded cylindrical portion 14 and a conical or flaring portion 15.
  • connection between the side lead-in wire 5 and the shell 7 of the base occurs at 17 between the skirt of the shell -and the expanded cylindrical portion 14.
  • the outer diameter of the portion 14 and the inside diameter of the shell are proportioned to give a reasonably tight fit in the region 17.
  • a firm and reliable contact connection is obtained by peening the skirt of the base inwardly against the seal shoulder and along a line transverse to the side lead-in wire as shown at 18 in Fig. 2.
  • the peening may be performed by means of a small vibrator 21 comprising a head or chuck 22 which is reciprocated backwards and forwards at a high speed in the direction indicated by the arrow 23.
  • the vibrator may, for instance, be an electric engraving tool or a small pneumatic air hammer.
  • a suitable electrical vibrator is marketed by the Burgess Vibrocrafters, Inc. of 180 North Wabash Avenue, Chicago 1, Illinois.
  • the stroke of the point may be adjusted by means of the knurled nut 25 and I have found that a stroke of approximately of an inch is generally satisfactory for a medium size base made of aluminum.
  • the peening may be done by swinging the ball point along the circumference of the shell parallel to its rim so as to give a line of small indentations which is transverse to the direction in which the lead-in wire lies and passes over it. This may readily be seen in Fig. 2 wherein the line of indentations 18 crosses over the side lead-in wire 5 which has been indicated in dotted outline.
  • a high-speed vibrator it is possible to deform the metal of the base inwards because it places a high stress on a very small area of the base .at a particular moment. Nevertheless the average pressure applied by the tool is relatively small and may be as little as a few ounces.
  • a base peening mechanism adapted to operate in conjunction with a prior art lamp finishing machine for the manufacture of incandescent lamps in accordance with my invention.
  • the finishing machine may be similar to that described in U. S. Patent 1,708,756, Pagan, and comprises a turret or reel, of which a fragment is shown at 27, having mounted on its periphery a plurality of lamp holding fixtures or heads 28.
  • suitable means are provided for rotating the reel in a counterclockwise direction as indicated by the curved arrow 29.
  • Such means i may comprise a supporting shaft and an intermittent drive mechanism adapted to advance the holders to successive stations for each indexing movement.
  • the lamp holding head 28 comprises a top plate 30 having an opening or recess 31 for receiving the end contact 9 of the base, and a cup 32 mounted on a spindle 33 which is biased upwardly by a spring 34.
  • connecting rod 52 may be reciprocated vertically by means of the usual cam 52' and rocker 53' connected to the drive shaft 46' of the machine in order to swing the vibrator point across the base during a suit able interval in the indexing cycle.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US399742A 1951-12-26 1953-12-22 Lamp basing apparatus Expired - Lifetime US2845107A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB73866D GB73866A (en, 2012) 1951-12-26
GB32102/52A GB738666A (en) 1951-12-26 1952-12-18 Improvements in and relating to electric lamps
FR65261D FR65261E (fr) 1951-12-26 1952-12-19 Perfectionnements aux connexions entre culot et conducteurs d'amenée de courant dans les lampes électriques et analogues
US399742A US2845107A (en) 1951-12-26 1953-12-22 Lamp basing apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US26343851A 1951-12-26 1951-12-26
US399742A US2845107A (en) 1951-12-26 1953-12-22 Lamp basing apparatus

Publications (1)

Publication Number Publication Date
US2845107A true US2845107A (en) 1958-07-29

Family

ID=26949851

Family Applications (1)

Application Number Title Priority Date Filing Date
US399742A Expired - Lifetime US2845107A (en) 1951-12-26 1953-12-22 Lamp basing apparatus

Country Status (3)

Country Link
US (1) US2845107A (en, 2012)
FR (1) FR65261E (en, 2012)
GB (2) GB738666A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179472A3 (de) * 1984-10-25 1988-10-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Einseitig gesockelte Quecksilberdampfniederdruckentladungslampe

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1641809A (en) * 1926-01-05 1927-09-06 Guenthart Adolph Method of forming outside double picks on round seams
US1817746A (en) * 1929-03-23 1931-08-04 Gen Electric Basing apparatus
US2032020A (en) * 1934-11-14 1936-02-25 Bartlett Hayward Co Method of expanding pistons
US2082079A (en) * 1936-02-25 1937-06-01 Alfred Hofmann & Company Lamp finishing machine
US2467083A (en) * 1945-05-02 1949-04-12 Ideal Ind Marker
US2484298A (en) * 1947-03-27 1949-10-11 Nielsen A C Co Stylus for graphic recording
US2636251A (en) * 1946-02-28 1953-04-28 Sylvania Electric Prod Base threader
US2732878A (en) * 1956-01-31 Lamp basing method
US2733419A (en) * 1956-01-31 Means for securing a lead wire to an electric lamp ease

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732878A (en) * 1956-01-31 Lamp basing method
US2733419A (en) * 1956-01-31 Means for securing a lead wire to an electric lamp ease
US1641809A (en) * 1926-01-05 1927-09-06 Guenthart Adolph Method of forming outside double picks on round seams
US1817746A (en) * 1929-03-23 1931-08-04 Gen Electric Basing apparatus
US2032020A (en) * 1934-11-14 1936-02-25 Bartlett Hayward Co Method of expanding pistons
US2082079A (en) * 1936-02-25 1937-06-01 Alfred Hofmann & Company Lamp finishing machine
US2467083A (en) * 1945-05-02 1949-04-12 Ideal Ind Marker
US2636251A (en) * 1946-02-28 1953-04-28 Sylvania Electric Prod Base threader
US2484298A (en) * 1947-03-27 1949-10-11 Nielsen A C Co Stylus for graphic recording

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179472A3 (de) * 1984-10-25 1988-10-05 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Einseitig gesockelte Quecksilberdampfniederdruckentladungslampe

Also Published As

Publication number Publication date
GB738666A (en) 1955-10-19
FR65261E (fr) 1956-02-08
GB73866A (en, 2012)

Similar Documents

Publication Publication Date Title
US2235515A (en) Manufacture of miniature lamps
GB542399A (en) Improvements relating to machines for manufacturing electric lamps and similar devices
US2845107A (en) Lamp basing apparatus
GB247923A (en) Improvements in and relating to machines for making electric incandescent lamps and similar articles
US2733419A (en) Means for securing a lead wire to an electric lamp ease
US2107254A (en) Electric tube construction
US1915361A (en) Method of sealing-in
US2708702A (en) Lamp base welding
US2711791A (en) Side lead trimmer for electric lamp manufacture
US2748450A (en) Automatic lamp base threading machine
US2732878A (en) Lamp basing method
US2832883A (en) Electric lamp manufacture
US3475641A (en) Electric incandescent lamp and mount structure with leading-in wires having inturned offset inner ends
US3722044A (en) Fabrication of focus grill type cathode ray tubes
US2709872A (en) Manufacture of cup type glass-to-metal seals
US2107903A (en) Method of manufacturing an electric device
US1965232A (en) Bulb for mechanical basing
US2809279A (en) Lamp basing apparatus
US2676435A (en) Automatic shank wire inserting device
US1716167A (en) Apparatus for and method of aligning elements in sealed containers
US3063709A (en) Mount pin and sealing head for sealing machine
US2671291A (en) Glassworking apparatus and method
US2997616A (en) Multiple filament incandescent lamp
US2030186A (en) Stem making apparatus
US2683865A (en) Electric lamp and base construction