US3837371A - Method of shaping filament supports of a miniature signal lamp - Google Patents

Method of shaping filament supports of a miniature signal lamp Download PDF

Info

Publication number
US3837371A
US3837371A US00336248A US33624873A US3837371A US 3837371 A US3837371 A US 3837371A US 00336248 A US00336248 A US 00336248A US 33624873 A US33624873 A US 33624873A US 3837371 A US3837371 A US 3837371A
Authority
US
United States
Prior art keywords
base
filament
towards
supports
filamentary
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
US00336248A
Other languages
English (en)
Inventor
J Rochet
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.)
Individual
Original Assignee
Individual
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 DEJ3956A priority Critical patent/DE892184C/de
Priority to GB4472/56A priority patent/GB825937A/en
Application filed by Individual filed Critical Individual
Priority to US496165A priority patent/US3908714A/en
Application granted granted Critical
Publication of US3837371A publication Critical patent/US3837371A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body

Definitions

  • ABSTRACT A process and an apparatus for manufacturing a miniature signal lamp.
  • the lamp has a base having a longitudinal axis and radially projecting filament supports that project from the base and lie in substantially a common plane.
  • the end portions of each filament support furthest from the base are connected to the filament.
  • a portion of each filament support is formed into a V-shaped configuration lying in a plane substantially perpendicular to the common plane wherein alternate ones of said V-shaped portions point in one longitudinal direction and the remaining ones point in the opposite longitudinal direction.
  • the purpose of this invention is to eliminate this disadvantage, and it therefore provides a new miniature lamp of this type particularly suitable for automatic mass production in large runs, and which above all has the advantage of having a final mounting diameter considerably smaller than the diameter of lamps known today since it is reduced to a value of around 8 mm.
  • this miniature signal lamp with base having a filament connected to power supply wires lodged in the base and secured by a number of radial filamentary supports, each of the latter having a first end fixed into a central bead of the base, and its other free end folded over on itself, to form a loop through which the filament passes, is characterised in that the various filamentary supports are folded into V-shapes open alternately towards the top and towards the bottom around the base of the lamp.
  • the miniature lamp in conformity with the invention thus offers the advantage that due to the mechanical folding into V-folds of the filamentary supports, its overall diameter is considerably reduced and can be reduced as required to a maximum mm for the finished lamp. Furthermore, due to the alternating opening towards the top and towards the bottom of the successive folds formed by the filamentary supports, the filament follows a zig-zag path and is thus perfectly tensioned. Finally the lamp in conformity with the invention is particularly suitable for automated production.
  • the invention also relates to a process for manufacturing base-mounted miniature signal lamps commencing with a base fitted with radial filamentary supports lodged at one of their ends in a central glass bead mounted at the top of the base, the ends of the filamentary supports being wound to form loops in which the filament is held in position, characterised in that each filamentary support is folded to a V-shape, at a point roughly in its middle, and alternately towards the top and towards the bottom for the various supports arranged in a star shape around the central bead.
  • FIG. 1 shows a schematic vertical projection of a miniature lamp base as it appears before the first stage in the process of manufacturing the lamp, i.e., with head downwards.
  • FIG. 2 shows the lamp base of FIG. 1 along line 11.
  • FIG. 3 shows an identical schematic vertical projection of the base after winding of the free ends of the filamentary supports around the filament.
  • FIG. 4 shows an identical schematic vertical projection of the base after shaping of the V-folds in the centres of the filamentary supports.
  • FIG. 5 shows an identical schematic vertical projection of the base after a further shaping operation on the supports which brings the V-folds closer to the axis.
  • FIG. 6 shows a view from above of the punch which produces the V-folds on the supports alternately towards the top and towards the bottom.
  • FIG. 7 shows a vertical projection of the punch shown in FIG. 6.
  • FIG. 8 shows a vertical projection of the bottom matrix corresponding to the punch shown in FIG. 7.
  • FIGS. 9 and l0 show respectively a vertical projection and a view from above of the device by means of which the V-folds of the filamentary supports are brought closer to the axis of the lamp base.
  • Base 1 of the miniature signal lamp shown in FIG. 1, as it appears before the first manufacturing operation, comprises a body 2 ending at the top in a nipped section 3 and at its bottom in a flared rib 4.
  • Base 1 is extended at its bottom towards a vacuum unit 5.
  • base 1 are embedded two electrodes or conductors 6 and 7, for the power supply to filament 8 connected at their top ends which project above nipped section 3. Filament 8 is shown not yet mounted in FIG. 1.
  • base 1 At its top end, base 1 has a central glass bead 9 into which are fixed the ends of the radial filamentary supports 10, only two of which are shown in FIG. 1.
  • These molybdenum supports are of a number varying between 3 and 11 for example, and are generally of an odd number.
  • the number selected for the supports is the traditional number of 7 arranged in a star pattern around the central bead 9.
  • the overall diameter a between the external ends of the two opposite filamentary supports 10 is around 20 mm before any manipulation of the said supports.
  • filament 8 is rested on each free end of supports 10, after the loop of the said filament has been closed to permit subsequent flow of electric current.
  • the first stage in the manufacturing process for the signal lamp is that of winding or hooking, in the traditional way, the free ends 10a of filamentary supports 10 to form loops or pigs tails" 11, around filament 8.
  • the base of the lamp then appears, after this operation, as it is shown in FIG. 3, i.e., with its filament 8 held in position by loops 11.
  • the next stage follows on the basis of the original manufacturing process and consists of folding each filamentary support 10 roughly at its centre into V-folds, opening alternately towards the top and towards the bottom for the various supports.
  • a base as shown in FIG. 4 in which can be seen on the lefthand side a V-fold 12 with its point towards the bottom, formed from left-hand support 10, and another V-fold 13 with its point towards the top, formed from the opposite filamentary support.
  • This operation is carried out very easily byusing a bottom matrix 14 (FIG. 8) and a corresponding top punch 15 (FIGS. 6 and 7).
  • Matrix 14 has a central axial recess 16 into which bead 9 is inserted and along the front surface 17 of the said matrix there are radial grooves into which are seated the various filamentary supports the ends of which have been previously looped.
  • This matrix 14 is oper ated with a top punch 15 with axial movement 18, the punch having on its bottom horizontal surface 19 ribs complementary to the grooves in the matrix; the ribs are distributed around the axis of the punch and offer successive peaks 20 and hollows 21 engaging respectively with complementary hollows 22a and peaks 22, of the same shape, provided in the grooves to form, from the filamentary supports 10 seated in these grooves, V-folds opening alternately towards the top and towards the bottom.
  • each peak 20 of the punch and 22 of the matrix has a recess 23 for loop 11 of support 10.
  • the punch 15 furthermore has an axial recess 24 over its entire height to permit penetration by the lamp base.
  • the second supplementary shaping operation on supports 10 can be carried out by means of the device shown in FIGS. 9 and 10 by way of example.
  • This device consists of an essentially cylindrical body 26 comprising a center chamber 27.
  • Lamp base 1 is shown schematically at the top section of body 26 with its filaments 10 already folded at their centres.
  • pistons 29, mounted to slide in body 26 retreat and cause a rotational movement of levers 30 around their respective axes 31, with engagement with two parallel wings 32a and 32b ofajaw 32.
  • Each lever 30 oscillates on a vertical plane and produces at its top end a movement of adjusting pushbutton 33 facing the axis of body 26.
  • the pushbutton 33 screwed onto the top part of lever 30 and adjustable in position by means of its hexagonal head 33a and its lock nut 34, is in contact with the rear surface of a radial finger 35, which presses the ends of supports 10 towards the axis of the lamp base.
  • the front surface 36 of finger in contact with support 10 comprises a vertical groove ensuring perfect holding of the said filament and holding it in position during its return movement.
  • each finger 35 is retracted by means of a spring-blade 27, and by its final movement the finger makes lever 30 pivot in the opposite direction, which has the effect of returning piston 29, disengaged from the inclined surface 28a of the cam, towards the centre of body 26.
  • the fingers 35 can be mounted so as to slide in body 26, or in another version can be mounted between the top surface 26a of the body and a circular flange 37 screwed at 38 on the latter.
  • Process for manufacturing a base-mounted miniature signal lamp comprising the steps of: providing a base fitted with radial filamentary supports fixed at one of their ends into a central glass bead, fitted at the top of the base, the ends of the filamentary supports being wound to form loops in which the lamp filament is held in position; and folding each filamentary support to a V-shape, roughly in its center, and alternately towards the bottom and towards the top, in the case of the various supports arranged in a star-pattern around the central bead, so as to tension the filament held at the end of each support by giving it a zig-zag path.
  • a process for manufacturing a lamp comprising the steps of: providing a base having a longitudinal axis and radially projecting filament supports projecting therefrom and lying in substantially a common plane and connected to a filament at one end portion thereof furthest from said longitudinal axis; and forming a portion of each filament support including said one end portion thereof into a V-shaped configuration lying in a plane substantially perpendicular to said common plane and wherein alternate ones of said V-shaped portions point in one longitudinal direction and the remaining ones point in the opposite longitudinal direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Wire Processing (AREA)
US00336248A 1950-03-31 1973-02-27 Method of shaping filament supports of a miniature signal lamp Expired - Lifetime US3837371A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DEJ3956A DE892184C (de) 1950-03-31 1951-03-30 Verfahren und Vorrichtung zur Herstellung von Gluehlampengestellen
GB4472/56A GB825937A (en) 1950-03-31 1956-02-13 Improvements in or relating to electric incandescent filament lamps
US496165A US3908714A (en) 1950-03-31 1974-08-09 Device for manufacturing a lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206850A FR2174347A5 (enrdf_load_stackoverflow) 1972-02-29 1972-02-29

Publications (1)

Publication Number Publication Date
US3837371A true US3837371A (en) 1974-09-24

Family

ID=9094314

Family Applications (1)

Application Number Title Priority Date Filing Date
US00336248A Expired - Lifetime US3837371A (en) 1950-03-31 1973-02-27 Method of shaping filament supports of a miniature signal lamp

Country Status (10)

Country Link
US (1) US3837371A (enrdf_load_stackoverflow)
JP (1) JPS5329955B2 (enrdf_load_stackoverflow)
BE (1) BE796025A (enrdf_load_stackoverflow)
DE (1) DE2309655C3 (enrdf_load_stackoverflow)
FR (1) FR2174347A5 (enrdf_load_stackoverflow)
GB (1) GB1420020A (enrdf_load_stackoverflow)
IN (1) IN139098B (enrdf_load_stackoverflow)
IT (1) IT979508B (enrdf_load_stackoverflow)
LU (1) LU67101A1 (enrdf_load_stackoverflow)
NL (1) NL166581C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470002A1 (fr) * 1990-08-02 1992-02-05 Jean-Michel Rochet Ampoule électrique miniature et sa technique de fabrication

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5517406U (enrdf_load_stackoverflow) * 1978-07-19 1980-02-04
JPH0295010A (ja) * 1988-09-30 1990-04-05 Ando Electric Co Ltd Ｍ系列発生回路の誤動作監視回路

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683473A (en) * 1950-03-31 1954-07-13 Gen Electric Method and apparatus for making filament mounts
US3172432A (en) * 1961-08-11 1965-03-09 Westinghouse Electric Corp Filament mounting apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696849A (en) * 1950-03-31 1954-12-14 Gen Electric Method of making filament mounts
GB825937A (en) * 1950-03-31 1959-12-23 Ismay Lamps Ltd Improvements in or relating to electric incandescent filament lamps

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2683473A (en) * 1950-03-31 1954-07-13 Gen Electric Method and apparatus for making filament mounts
US3172432A (en) * 1961-08-11 1965-03-09 Westinghouse Electric Corp Filament mounting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470002A1 (fr) * 1990-08-02 1992-02-05 Jean-Michel Rochet Ampoule électrique miniature et sa technique de fabrication
FR2665573A1 (fr) * 1990-08-02 1992-02-07 Rochet Jean Michel Ampoule electrique miniature et sa technique de fabrication.

Also Published As

Publication number Publication date
DE2309655A1 (de) 1973-09-27
IN139098B (enrdf_load_stackoverflow) 1976-05-08
IT979508B (it) 1974-09-30
BE796025A (fr) 1973-06-18
DE2309655B2 (de) 1979-08-02
DE2309655C3 (de) 1980-04-10
NL7302781A (enrdf_load_stackoverflow) 1973-08-31
LU67101A1 (enrdf_load_stackoverflow) 1973-06-15
GB1420020A (en) 1976-01-07
NL166581C (nl) 1981-08-17
JPS5329955B2 (enrdf_load_stackoverflow) 1978-08-24
FR2174347A5 (enrdf_load_stackoverflow) 1973-10-12
JPS4925781A (enrdf_load_stackoverflow) 1974-03-07
NL166581B (nl) 1981-03-16

Similar Documents

Publication Publication Date Title
US3837371A (en) Method of shaping filament supports of a miniature signal lamp
US1816683A (en) Filament mounting machine
US2491237A (en) Manufacture of miniature lamps
US2380320A (en) Machine for making radio tube heater elements
US4288239A (en) Method of making a convoluted tubular envelope for a compact electric discharge lamp
US3908714A (en) Device for manufacturing a lamp
US2372082A (en) Coiling machine for fine wire
US1612537A (en) Leading-in wire-locating device
US3942063A (en) Incandescent lamp having increased life
US2653631A (en) Support wire forming apparatus
EP0743673B1 (en) Coiled-coil filament for an incandescent lamp
US2667189A (en) Method and apparatus for mounting filament wire
US2683473A (en) Method and apparatus for making filament mounts
US3982145A (en) Filament supports for tubular electric incandescent lamps
US3069583A (en) Electric lamp
US2696849A (en) Method of making filament mounts
US3058497A (en) Filament-stretching device
US3000407A (en) Electric lamp mount making method and apparatus
US2935782A (en) Assembly methods for electrode structures of electrical discharge devices
US1593824A (en) Method of and machine for forming and mou ting filaments
US2655952A (en) Method of forming lamp filaments
US2167765A (en) Filament and method of making
US1647624A (en) Machine for and method of mounting filaments
US2841189A (en) Apparatus for mounting filaments
US3956808A (en) Method of manufacturing a tube assembly for electric lamps