US1668016A - Crystal-wire filament for incandescent electric lamps and the method of winding it - Google Patents

Crystal-wire filament for incandescent electric lamps and the method of winding it Download PDF

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Publication number
US1668016A
US1668016A US90182A US9018226A US1668016A US 1668016 A US1668016 A US 1668016A US 90182 A US90182 A US 90182A US 9018226 A US9018226 A US 9018226A US 1668016 A US1668016 A US 1668016A
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US
United States
Prior art keywords
wire
filament
winding
core
crystal
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
US90182A
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English (en)
Inventor
Hauschild Max
Berger Walter
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.)
NEUE GLUHLAMPEN GmbH
NEUE GLUHLAMPEN-GESELLSCHAFT mbH
Original Assignee
NEUE GLUHLAMPEN GmbH
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 NEUE GLUHLAMPEN GmbH filed Critical NEUE GLUHLAMPEN GmbH
Application granted granted Critical
Publication of US1668016A publication Critical patent/US1668016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/04—Apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
    • 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
    • H01K3/02—Manufacture of incandescent bodies
    • 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
    • H01K3/02—Manufacture of incandescent bodies
    • H01K3/04—Machines therefor
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/702—Overbending to compensate for springback
    • 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
    • Y10T29/49609—Spring making
    • 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
    • Y10T29/4981—Utilizing transitory attached element or associated separate material

Definitions

  • the light-eflect of an incandescent electric lamp is to be intensified it is essential for its length of filament to be crowded into as small aspace as possible, a process which is specially difiicult to perform where filaments of an length have to be thus arranged.
  • Suc a crowded arrangement of the incandescent part of a lamp brings about a far greater intensity of light in the case of an incandescent gas lamp, than it does in a vacuum bulb, inasmuch as the loss of light occasioned by radiation and carrying off of heat is in that case reduced to a minimum.
  • ready-formed long or single crystal wire or filament containing tungsten for instance, is wound on a core of comparatively big sectional out, which, however, is not circular in appearance but shows alternatively sharp and quite flat bends or perfectly straight stretches and is twisted in such a manner, that these straight or only slightly bent stretches of the separate screw-like twists of the core are arranged at a varying angle to each other round the. axis of the core, i. e., round the incandescent body of the lamp, so that. when seen as a wholein the direction of the axis, they present a sectional view as completely as possible covered with filament wires.
  • the wire, brought to white heat, is bent, i. e., wound round a core such as shown in Fig.. of the drawing which resembles alo w-p1tched worm, but the inclination of pitch of which, for example, always presents a triangular sectional view, i. e., three straight stretches, f, f and f" and three acute angles between these in such a manner, that every complete turn of the wire describes the form of a triangle, the third or end corner of which is, however.
  • each turn of the wire in addition, has an angle of twist of at least 5, measured from the axis of the latter.
  • the finished filament seen in line with its axis, presents a web of wires, more or less crowded together, according to the number of threads of the said screwor worm-like core and covering almost the entire cross section. If the wires are arranged so that at least a few of the straight or only slightly bent stretches thereof pass through the axis of the finished filament it will be found, that even the central portion of the said web, when seen in the direction of said axis, is not free from filament wire, (as shown in Fig. 3 corresponding to Fig. 3) in other words, that there is no gap so that the whole of the incandescent part of a lamp is a completely glowing surface. Now the uniformity of arrangement of this extraordinary, intensively glowing surface can be rendered more or less perfect, according to the number of turns performed in the screw-like winding of the filament and according to the number of the more or less straight stretches of wire crowded together.
  • the crystal wire ready-formed for the purpose and wound up at white heat, retains the form imparted to it by the process of bending and winding on to this core,
  • the filament product will not alter even after frequent burning in the lamp. Concussions and vibrations will not affect it and, if desired, it need not even be supported in its centre or at most but once.
  • the second method of winding is also performed with crystal wire, ready formed for the purpose but kept at a very low temperature, i. e., not in aglowing condition and only just sufiiciently heated to prevent it from being brittle and just easily bendable.
  • the wire is wound s iral- 1y over a c0re.-a section of which atter is almost circular in appearance but has atleast one, more or less segment flattened gart about it,-or two cores, at a suitable istance from, and firmly connected to each' other are used.
  • the two cores here referred to, are illustrated by a and b of Figs. 1 and 2 of the accompanying drawing, the first of which shows this method of winding in a section perpendicular to the core, whilst the second is a side view of the same.
  • Figs. 3 and 4 show the finished filament wound in this manner after removal of the cores a and b, the respective views corresponding to Figs. 1 and 2.
  • Fig. 3 is aside view of a finished filament before being mounted in a lamp.
  • Fig. 5 shows a bulb fitted with a filament made according to this invention.
  • Fig. 6 1s a perspective view of a core witha few windings of the filament thereon.
  • the space d of Fig. 3 can, however, also be left free for the insertion of a rod e by way of support for the wire a.
  • This rod e consisting of an insulating material such as magnesia or thorium oxide, etc., will attain a white heat under the'influence of the high temperature developed by the filament and will thus also add its share to the brightness of light.
  • the incandescent electric filament enclosed in a vacuum bulb as seen in Fig. 5 is made in accordance with the invention here claimed.
  • the said filament c is seen to be joined to the leads 9 and at f and f without requiring any furt er support.
  • the end h of the filament wire is arranged over the middle of the incandescent surface and seen in line with the axis of the filament.
  • Method of producing filaments for elec tric incandescent lamps from wires of metals having a very high melting temperature by bending ready-formed long crystal wire over a mandrel other than circular, by permitting the spiral thus wound to relax, after removal of the mandrel, into the shape according to the inner mechanical tension of the bent wire and by then inserting the filament in theform thus assumed into an incandescent lamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Resistance Heating (AREA)
US90182A 1925-09-21 1926-02-23 Crystal-wire filament for incandescent electric lamps and the method of winding it Expired - Lifetime US1668016A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE121204X 1925-09-21
DE1668016X 1925-11-15
DE221025X 1940-09-06

Publications (1)

Publication Number Publication Date
US1668016A true US1668016A (en) 1928-05-01

Family

ID=27180457

Family Applications (1)

Application Number Title Priority Date Filing Date
US90182A Expired - Lifetime US1668016A (en) 1925-09-21 1926-02-23 Crystal-wire filament for incandescent electric lamps and the method of winding it

Country Status (5)

Country Link
US (1) US1668016A (enrdf_load_stackoverflow)
CH (2) CH121204A (enrdf_load_stackoverflow)
FR (1) FR619648A (enrdf_load_stackoverflow)
GB (1) GB259810A (enrdf_load_stackoverflow)
NL (1) NL19275C (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444433A (en) * 1943-08-09 1948-07-06 Standard Telephones Cables Ltd Electrical connector
US2534393A (en) * 1948-08-26 1950-12-19 Bell Telephone Labor Inc Electrode assembly for electrical discharge devices
US2623550A (en) * 1948-12-20 1952-12-30 Pierre Dreyfuss Baumann Method of making split rings
US2713377A (en) * 1953-02-20 1955-07-19 Charles M Tursky Method and apparatus for producing filter coils
US2759166A (en) * 1952-06-20 1956-08-14 Bell Telephone Labor Inc Wrapped electrical connection
US3294125A (en) * 1963-11-14 1966-12-27 Westinghouse Electric Corp Electrode coil and method
US3354691A (en) * 1964-11-13 1967-11-28 Sylvania Electric Prod Process of fabricating refractory metal forms
DE3123442A1 (de) * 1981-06-12 1982-12-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Gluehwendel fuer eine elektrische lampe und verfahren zur herstellung
US6161598A (en) * 1996-12-20 2000-12-19 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Method for producing helically wound filament elements, and filament elements produced according to this method
WO2013120683A1 (de) * 2012-02-13 2013-08-22 Osram Gmbh Glühfaden für elektrische lampen und elektrische lampe sowie herstellungsverfahren für einen glühfaden

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053547B (de) * 1956-02-10 1959-03-26 Patra Patent Treuhand Tageslichtsignal fuer Eisenbahnen mit einer elektrischen Gluehlampe

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444433A (en) * 1943-08-09 1948-07-06 Standard Telephones Cables Ltd Electrical connector
US2534393A (en) * 1948-08-26 1950-12-19 Bell Telephone Labor Inc Electrode assembly for electrical discharge devices
US2623550A (en) * 1948-12-20 1952-12-30 Pierre Dreyfuss Baumann Method of making split rings
US2759166A (en) * 1952-06-20 1956-08-14 Bell Telephone Labor Inc Wrapped electrical connection
US2713377A (en) * 1953-02-20 1955-07-19 Charles M Tursky Method and apparatus for producing filter coils
US3294125A (en) * 1963-11-14 1966-12-27 Westinghouse Electric Corp Electrode coil and method
US3354691A (en) * 1964-11-13 1967-11-28 Sylvania Electric Prod Process of fabricating refractory metal forms
DE3123442A1 (de) * 1981-06-12 1982-12-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Gluehwendel fuer eine elektrische lampe und verfahren zur herstellung
US4506187A (en) * 1981-06-12 1985-03-19 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Lamp filament structure, and method of its manufacture
US6161598A (en) * 1996-12-20 2000-12-19 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Method for producing helically wound filament elements, and filament elements produced according to this method
WO2013120683A1 (de) * 2012-02-13 2013-08-22 Osram Gmbh Glühfaden für elektrische lampen und elektrische lampe sowie herstellungsverfahren für einen glühfaden

Also Published As

Publication number Publication date
CH121204A (de) 1927-07-01
FR619648A (fr) 1927-04-06
NL19275C (enrdf_load_stackoverflow)
CH221025A (de) 1942-05-15
GB259810A (en) 1926-10-21

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