US3223875A - Electric heating tube in which enlarged convolutions of filament coil act as filament supports - Google Patents

Electric heating tube in which enlarged convolutions of filament coil act as filament supports Download PDF

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Publication number
US3223875A
US3223875A US859820A US85982059A US3223875A US 3223875 A US3223875 A US 3223875A US 859820 A US859820 A US 859820A US 85982059 A US85982059 A US 85982059A US 3223875 A US3223875 A US 3223875A
Authority
US
United States
Prior art keywords
filament
coil
convolutions
tube
electric heating
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
US859820A
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English (en)
Inventor
Eggers Reinhold
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 NL246153D priority Critical patent/NL246153A/xx
Priority to NL246153A priority patent/NL105454C/xx
Priority to CH8157759A priority patent/CH375455A/de
Priority to AT899959A priority patent/AT223720B/de
Priority to FR812762A priority patent/FR1242241A/fr
Priority to GB42119/59A priority patent/GB936280A/en
Priority to BE585620A priority patent/BE585620A/fr
Application filed by Individual filed Critical Individual
Priority to US859820A priority patent/US3223875A/en
Priority to DEP24531A priority patent/DE1122165B/de
Application granted granted Critical
Publication of US3223875A publication Critical patent/US3223875A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0038—Heating devices using lamps for industrial applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0038—Heating devices using lamps for industrial applications
    • H05B3/0057—Heating devices using lamps for industrial applications for plastic handling and treatment
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • H05B3/0071—Heating devices using lamps for domestic applications
    • H05B3/0076—Heating devices using lamps for domestic applications for cooking, e.g. in ovens

Definitions

  • Electric heating tubes are employed for many different purposes, for example, for drying and baking paints and enamels, for softening plastics, for baking, roasting, or grilling food, etc.
  • the heating coil is designed so that a few of the windings of the coil, which are disposed at suitable distances from each other, rest upon the wall of the tubular enclosure and form supporting elements.
  • the heating tube according to the invention therefore contains a self-supporting heating coil which extends exactly coaxially with the quartz tube or other suitable tubular enclosure.
  • the coil supports are current-carrying integral components of the coil itself, and therefore radiate heat as the other portions of the coil.
  • the supporting parts according to the invention are integral components of the coil, no deformations of the coil after initial shaping will occur.
  • the coils according to the invention have the further advantage of being more easily inserted into the tubular enclosure since they cannot cause any binding or wedging. They are also superior to the known coils in having a much longer life.
  • the supporting parts which according to the invention are formed by the windings of the coil itself are pref- I 3,223,875 Patented Dec. 14, 1965
  • the encasing tube may be partly provided with a lightreflecting coating.
  • a longitudinally extending reflecting strip may be deposited by metallization on the outside of the tube so that all rays emitted by the heating coil will be directed toward the other side of the heating tube where they are to be utilized.
  • the encasing tube of the heater which consists of quartz or a special glass may be suitably colored, for example, ruby-red, black, or the like.
  • FIGURE 1 shows a side view of an electric heating tube according to the invention
  • FIGURE 2 shows a cross section thereof; while FIGURE 3 shows a similar cross section of a heating tube according to a modification of the invention.
  • the electric heater according to the invention consists of a heating coil 2 of tungsten wire which is enclosed within a vacuum-tight tube 3 of quartz or a similar heat-resistant material and extends therein in the axial direction.
  • the ends of the heating coil 2 are connected to fused-in vacuum-tight leads 4 and the quartz tube 3 is evacuated.
  • Heating coil 2 is wound so that at regular distances individual coil windings of the tungsten wire which is otherwise helically wound are bent outwardly so as to define, for example, a triangle, as shown in FIGURE 2, the outer circumference of which corresponds to or is slightly smaller than the inner di arneter of the quartz tube so that the triangle is inscribed in a circle substantially identical with the circle formed by the cross section of the cavity in the tube 3.
  • These substantially triangular windings of coil 2 form supporting parts 1 which maintain the coil in a central position within the quartz tube 3.
  • FIGURE 3 illustrates a modification of the coil 2, in which the regularly spaced windings 1 are bent into a fiat elliptical shape 1 inscribed into the circular cross section of the tube cavity.
  • the encasing tube 3' shown in FIG. 3 is partly provided with a light reflecting coating 5.
  • the coating is a longitudinally extending reflecting metal strip deposited on the outside of the tube 3' by metallizing.
  • the rays emitted by the heating coil 2 are directed by the coating 5 toward the other side of the tube.
  • the encasing tube 3' is colored ruby red to filter out most visible light radiation while passing radiant heat.
  • the two illustrated particular shapes of the supporting windings 1, 1 of the heating coil 2 are mere examples of some of the many suitable shapes in which the heating coil may be wound.
  • a tungsten wire or a wire of another suitable refractory material is wound upon a round wire core and the winding operation is interrupted at certain intervals.
  • a winding which serves as a supporting part 1 is then wound over a die, for example, of triangular shape, whereupon winding is continued for the required distance on the round core until the next specially shaped winding is to be formed.
  • the completed coil is heated on the winding core to such a high temperature that no deformation will occur in service.
  • the present invention facilitates the production of heating tubes and other vacuum tubes in which filaments of a similar type may be used.
  • the number of rejects In order to filter out the undesirable wave lengths which occur during the production of these tubes is extremely small.
  • heating tube accord-, ing to the invention is therefore relatively inexpensive and it has the further advantage of radiating heat at a uniform temperature along its entire length.
  • the invention is not limited to heating tubes but may also be applied to other incandescent or vacuum tubes which are intended for other purposes and in which the wire filament should be maintained in awell defined position.
  • Electric heat-generating. device comprising a hermetically sealed tubular enclosure having two ends, an inside wall, and an inside diameter, two conductors sealed through said ends,.and an integral coiled filament extending approximately centrally within said enclosure and being connected at its ends to said conductors, said coiled filament including a-main portion of smaller convolutions and at least a single larger convolution, said main portion having a substantially cylindrical shape and an outside diameter smaller than said inside diameter, said single larger convolution being shaped to provide point-contacts with said inside wall and thus to, position said. filament.
  • said convolution when viewed in plan, having the outline of a paper 1 clip, and being adapted to engage said inside Wall in two points.

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  • Resistance Heating (AREA)
US859820A 1958-12-13 1959-12-15 Electric heating tube in which enlarged convolutions of filament coil act as filament supports Expired - Lifetime US3223875A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL246153D NL246153A (enrdf_load_stackoverflow) 1958-12-13
NL246153A NL105454C (enrdf_load_stackoverflow) 1958-12-13 1959-12-07
CH8157759A CH375455A (de) 1958-12-13 1959-12-08 Röhrenförmiger Hochleistungswärmestrahler
FR812762A FR1242241A (fr) 1958-12-13 1959-12-11 élément chauffant tubulaire à grande puissance agissant par rayonnement
AT899959A AT223720B (de) 1958-12-13 1959-12-11 Röhrenförmiger Hochleistungswärmestrahler
GB42119/59A GB936280A (en) 1958-12-13 1959-12-11 Electric heating tube
BE585620A BE585620A (fr) 1958-12-13 1959-12-14 Radiateux de chaisur de forme tubulaire à rendement éléve
US859820A US3223875A (en) 1958-12-13 1959-12-15 Electric heating tube in which enlarged convolutions of filament coil act as filament supports
DEP24531A DE1122165B (de) 1958-12-13 1960-03-01 Verfahren zur Herstellung rohrfoermiger elektrischer Gluehlampen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEE0016873 1958-12-13
US859820A US3223875A (en) 1958-12-13 1959-12-15 Electric heating tube in which enlarged convolutions of filament coil act as filament supports

Publications (1)

Publication Number Publication Date
US3223875A true US3223875A (en) 1965-12-14

Family

ID=25331786

Family Applications (1)

Application Number Title Priority Date Filing Date
US859820A Expired - Lifetime US3223875A (en) 1958-12-13 1959-12-15 Electric heating tube in which enlarged convolutions of filament coil act as filament supports

Country Status (8)

Country Link
US (1) US3223875A (enrdf_load_stackoverflow)
AT (1) AT223720B (enrdf_load_stackoverflow)
BE (1) BE585620A (enrdf_load_stackoverflow)
CH (1) CH375455A (enrdf_load_stackoverflow)
DE (1) DE1122165B (enrdf_load_stackoverflow)
FR (1) FR1242241A (enrdf_load_stackoverflow)
GB (1) GB936280A (enrdf_load_stackoverflow)
NL (2) NL105454C (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375393A (en) * 1963-10-22 1968-03-26 Sylvania Electric Prod Incandescent lamp
US3385993A (en) * 1965-08-16 1968-05-28 Westinghouse Electric Corp Filament support for tubular incandescent lamps
US3449546A (en) * 1966-06-23 1969-06-10 Xerox Corp Infra-red heater
US3878350A (en) * 1971-07-15 1975-04-15 Sharp Kk Microwave cooking apparatus
US3982145A (en) * 1975-02-24 1976-09-21 General Electric Company Filament supports for tubular electric incandescent lamps
EP0533478A1 (en) * 1991-09-18 1993-03-24 General Electric Company Incandescent lamps having integrally supported filaments
US6041164A (en) * 1998-11-04 2000-03-21 Hofius, Sr.; David V. Expansion and mounting apparatus for infrared radiant energy source
US6591062B2 (en) * 2000-06-21 2003-07-08 Heraeus Noblelight Gmbh Infrared radiator with carbon fiber heating element centered by spacers
US20060016803A1 (en) * 2004-07-21 2006-01-26 Lg Electronics Inc. Carbon heater
US20060032847A1 (en) * 2004-07-27 2006-02-16 Lg Electronics Inc. Carbon heater
US20100116813A1 (en) * 2007-04-27 2010-05-13 Panasonic Corporation Heat generation unit
CN104093228A (zh) * 2014-07-09 2014-10-08 陆国梁 大功率双螺旋红外线加热灯管
EP2924713A1 (en) * 2014-03-25 2015-09-30 Toshiba Lighting & Technology Corporation Heater with visible light reducing optical film
US11462396B2 (en) * 2013-09-05 2022-10-04 Applied Materials, Inc. Lamp cross-section for reduced coil heating

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4207457A (en) * 1978-06-29 1980-06-10 The Kanthal Corporation Porcupine wire coil electric resistance fluid heater
GB8308103D0 (en) * 1983-03-24 1983-05-05 Emi Plc Thorn Quartz infra-red lamps

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342044A (en) * 1942-07-24 1944-02-15 Gen Electric Electric radiant energy device
US2523033A (en) * 1949-12-16 1950-09-19 Gen Electric Electric radiant energy device
US2859368A (en) * 1951-10-20 1958-11-04 Sylvania Electric Prod Heat lamp
US2864025A (en) * 1953-08-24 1958-12-09 Gen Electric Infrared ray generating device
US2883571A (en) * 1958-03-03 1959-04-21 Gen Electric Electric incandescent lamp
US2957154A (en) * 1958-06-16 1960-10-18 Glo Quartz Electric Heater Co Resistance heating unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342044A (en) * 1942-07-24 1944-02-15 Gen Electric Electric radiant energy device
US2523033A (en) * 1949-12-16 1950-09-19 Gen Electric Electric radiant energy device
US2859368A (en) * 1951-10-20 1958-11-04 Sylvania Electric Prod Heat lamp
US2864025A (en) * 1953-08-24 1958-12-09 Gen Electric Infrared ray generating device
US2883571A (en) * 1958-03-03 1959-04-21 Gen Electric Electric incandescent lamp
US2957154A (en) * 1958-06-16 1960-10-18 Glo Quartz Electric Heater Co Resistance heating unit

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375393A (en) * 1963-10-22 1968-03-26 Sylvania Electric Prod Incandescent lamp
US3385993A (en) * 1965-08-16 1968-05-28 Westinghouse Electric Corp Filament support for tubular incandescent lamps
US3449546A (en) * 1966-06-23 1969-06-10 Xerox Corp Infra-red heater
US3878350A (en) * 1971-07-15 1975-04-15 Sharp Kk Microwave cooking apparatus
US3982145A (en) * 1975-02-24 1976-09-21 General Electric Company Filament supports for tubular electric incandescent lamps
EP0533478A1 (en) * 1991-09-18 1993-03-24 General Electric Company Incandescent lamps having integrally supported filaments
US6041164A (en) * 1998-11-04 2000-03-21 Hofius, Sr.; David V. Expansion and mounting apparatus for infrared radiant energy source
USRE40181E1 (en) * 2000-06-21 2008-03-25 Heraeus Noblelight Gmbh Infrared radiator with carbon fiber heating element centered by spacers
US6591062B2 (en) * 2000-06-21 2003-07-08 Heraeus Noblelight Gmbh Infrared radiator with carbon fiber heating element centered by spacers
US20060016803A1 (en) * 2004-07-21 2006-01-26 Lg Electronics Inc. Carbon heater
US20060032847A1 (en) * 2004-07-27 2006-02-16 Lg Electronics Inc. Carbon heater
US7769278B2 (en) * 2004-07-27 2010-08-03 Lg Electronics Inc. Carbon heater
US20100116813A1 (en) * 2007-04-27 2010-05-13 Panasonic Corporation Heat generation unit
EP2146547A4 (en) * 2007-04-27 2011-05-18 Panasonic Corp HEAT GENERATION BODY UNIT
US11462396B2 (en) * 2013-09-05 2022-10-04 Applied Materials, Inc. Lamp cross-section for reduced coil heating
EP2924713A1 (en) * 2014-03-25 2015-09-30 Toshiba Lighting & Technology Corporation Heater with visible light reducing optical film
CN104093228A (zh) * 2014-07-09 2014-10-08 陆国梁 大功率双螺旋红外线加热灯管

Also Published As

Publication number Publication date
BE585620A (fr) 1960-04-01
GB936280A (en) 1963-09-11
NL246153A (enrdf_load_stackoverflow)
CH375455A (de) 1964-02-29
FR1242241A (fr) 1960-12-30
NL105454C (enrdf_load_stackoverflow) 1963-02-15
AT223720B (de) 1962-10-10
DE1122165B (de) 1962-01-18

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