US1359400A - Electric heater - Google Patents

Electric heater Download PDF

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Publication number
US1359400A
US1359400A US390920A US39092020A US1359400A US 1359400 A US1359400 A US 1359400A US 390920 A US390920 A US 390920A US 39092020 A US39092020 A US 39092020A US 1359400 A US1359400 A US 1359400A
Authority
US
United States
Prior art keywords
jacket
resistor
insulation
heater
electric heater
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
US390920A
Other languages
English (en)
Inventor
Edwin N Lightfoot
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.)
Cutler Hammer Manufacturing Co
Original Assignee
Cutler Hammer Manufacturing 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23544500&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US1359400(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cutler Hammer Manufacturing Co filed Critical Cutler Hammer Manufacturing Co
Priority to US390920A priority Critical patent/US1359400A/en
Application granted granted Critical
Publication of US1359400A publication Critical patent/US1359400A/en
Priority to DEC30468D priority patent/DE416735C/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/16—Rigid-tube cables
    • 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
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49087—Resistor making with envelope or housing
    • Y10T29/49089—Filling with powdered insulation
    • Y10T29/49091—Filling with powdered insulation with direct compression of powdered insulation
    • 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
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49087—Resistor making with envelope or housing
    • Y10T29/49098—Applying terminal

Definitions

  • the resistor is helical or winding and the insulation-is compacted and comp thereon.
  • Thejacket is ordinarily contracted crosswise tothoroughlycompren and compact v the insulation.
  • the com ressed insulation finnly- Me the residor in she and at in place endinsulates it from the and its turns or convolntions from as other.
  • the helicalor winding resistor mey its turns or convolutions extensively varied in diameter and number per inch to varyso throughout-a wide range its ohmic W Indication of Letters latent. Pgtented 0v. 16,
  • .Its externalheated surface may be small for a high ohmic resistance.
  • Its ength may be short for a resistor of h' h ohmic resistance.
  • t has low thermal resistance and high thermal conductivity between the redstor andwxternal heated surface.
  • Fig. 2 1s a sectional view onfline 2--2' of Its resistor may ha'veits ohmic resistance.
  • ig. 7 is a sectional view online 77 of' difierent lengths and ohmic resistances and formed into helices having the same length and diameter and different numbers of turns to adapt them to the same-external heater surface;
  • Fig. 9 shows in swaging hammers
  • F 1g. 10 is an end elevation of a pair of swaging hammers
  • Fig. 11 is an elevation of a heater like that shown in Fig. 1;
  • Fig. 12 shows the heater bent into helical Fig.13 shows the heater bent into reflexe form
  • Fig. 14 shows a heater immersion heater
  • Fig. 15 shows the heater bent into looped form
  • Fig. 16 shows the looped heater mounted upon the surface of a plate
  • Fig. 17 is a sectional of Fig. 16;
  • Fig. 18 shows the looped heater arranged in the groove formed in a plate
  • Fig. 19 is asectional ew on line 19-19 bent to form an of Fig. 18;
  • Fig. 20 shows the looped heater embedded in aplate
  • Fig. 21 is a sectional view on line 21-21 of Fig. 20; Fig. 22 diagrammatically illustrates a.
  • Fig. 23 is an enlarged vertical section through the spacing tamper for holding the resistor in place within the jacket and com-.
  • Fig. 24 is a cross-sectional view on line 24-24 of Fig. 23.
  • Figs. 1 to..4 show a heater which is provided with plug terminals.
  • the heater comprises an elon tedductile tubular jacket or casing 1; p ug terminals 2, one inserted in each end of the jacket and rigidly fastened thereto; a ductile helical resistor 3 arranged within the jacket and connected to the terminals; and insulation 4 compacted within the jacket and around and about the resistor.
  • Fi to 7 show a similar heater provide wlth'c'ap terminals instead of plug terminals.
  • the insulation is compacted when it is first put into the jacket, and then after the terminals are secured in position, the jacket is ordinarily contracted crosswise to further compress and ...compact the insulation.
  • Jacket Length about thirty (30)inches.
  • Helical resistor Outside diameter of helix three-th1rtyseconds (3/32) inch.
  • Diameter of resistor wire,fr0m about one one hundred twent fifth (1/125) inch to about one-fortieth 1/40). inch.
  • the jacket is swaged or otherwise contracted crosswise to reduce its diameter and there by tightly compress the insulation upon and around and about the resistor.
  • the jacket is not materially elongated or increased in length.
  • Figs. 9 and 10 show a pair of swaging hammers by means of which the jacket may be hammered or swaged to contract it. These hammers are placed in a machine by which they are rapidly vibrated and while the are vibrating the heater is moved back an forth and turned between the same until the jacket has been reduced in diameter throughout its le ductile material, for instance, nickel-chromium, nickel-steel, nickel-copper or other 7 resistance wire.
  • le ductile material for instance, nickel-chromium, nickel-steel, nickel-copper or other 7 resistance wire.
  • the number of turns per inch in the helix I depends upon the lengths of wire and ohmic resistance to be obtained.
  • the helix may first be wound with its turns close together and then stretched out to obtain the number of turns per inch necessary to give the required ohmic resistance.
  • Fig. 8 shows three helical resistors made from wire oithe maize and material.
  • helical resistor gives a relatively hi h ohmic resistance for a helix of a given ength and diameter and a given external heater surface, which ohmic resistance may be varied through a wide range by simply varying the number of turns per inch or the diameter of the turns or convolutions or both.
  • the resistor is provided at each end with a connector 5 by means of which it may be connected to the terminals.
  • the plug terminal 2 (Fig. 1) has a plug which is inserted into the jacket and insulated therefrom by an insulating sleeve 7 The jacket is swaged or otherwise contracted upon the plug so as to firmly bind the terminal in place.
  • the plug may be provided with an annular groove to allow an indentation to be made in the insulating sleeve andthe jacket to assist in fastening the terminal to the
  • An insulating bushing 8 formed to cover the jacket may be threaded upon the lug. This bushing protects the insulating s eeve and further insulates the plug from the jacket.
  • the terminal is provided with a central has an indentation 9 swaged or otherwise formed therein to bind the connector thereto.
  • the cap terminal (Fig. 5) has a cap 10 which receives the jacket and is .insulated therefrom by an insulating sleeve 11. The cap is swaged or otherwise contracted upon the jacket to fasten it in position.
  • the insulation may 'be made" of various 7 materials and inserted in different ways.
  • the I dered insulation may be poured into the.
  • the jacket is finally ordinarily swaged or otherwise contracted crosswise to further com ress and compact l the insulation therein an around and about the resistor.
  • the insulation insulates the resistor from the jacket and its turns from each other. It further holds the resistor and its'terminal in place so that the heater may be bent into various forms. a Forms of heater.
  • the heater is com lete in itself and-may be employed either a one or applied to heating appliances.
  • t is. originally straight in form as shown in Fig. 11 or may be bent into other forms as shown in Figs. 12 to 21 according to the purpose for which it is to be used.
  • F1 12 shows a helical heater
  • Fig. 13 a re exed heater which may be used either alone or applied to heating appliance.
  • Fig. 14 showsan immersion heater which may be suspended within a vessel to heat 1i uid therein.
  • ig. 15 shows a looped heater which may be applied to a plate or. other body to be heate Figs. 16 and fastened to the surface of a plate.
  • Figs. 18 and 19 show the looped heater set in a grooved form in a plate.
  • Figs. 20 and 21 show the loo ed heater 17 show the looped heater I Y 10:s
  • T e machine comprises in general a vibratory carrier 12 which is provided with an upper bracket 13 and a lower bracket 14 between which the heater is supported.
  • the up er bracket is .recessed to receive the end 0 the jacket and the lower bracket has a yielding seat 15 to receive the heater terminal, i v
  • the resistor is held in position'by a cord 16 attached thereto and connected to a, reel 17.
  • the insulation, powdered or granular, is carried in a can 18 mounted upon the carrier and having its spout located to feed the andconnected to the terminal, and mag nesium oxid compacted within the jacket insulation into the jacket through a hole in the bracket 13.
  • the carrier is mounted upon a spring 19 and is vibrated by means of a rotar cam 20.
  • a tubular tamper 21 provided with radial lugs 32, extends into the jacket and seryes to center and position the resistor and tamp the insulation.
  • This tamper is lifted and dropped by yieldingly rotary jaws 23.
  • the carrier When the machine is in operation, the carrier is vibrated up and down and the tamper lifted and ,dropped and accordingly the insulation is both shaken and tamped to compress the same within the jacket.
  • An electric heater complete in itself, comprising a winding resistor, insulation compacted and compressed around and about the same, a tubular metal jacket surrounding the insulation and contracted crosswise thereon to compact and compress the same, and a terminal rigidly fastened to the jacket and connected to the resistort 2.
  • An electric heater complete in itself comprising an elongated tubular metal jacket, a terminal ri idly fastened to and insulated from the acket, a winding re-' sistor arranged within the jacket and connected to the terminal, and insulation compacted within the jacket and compressed upon, around and about the resistor.
  • An electric heater complete in itself, comprising an elongated ductile, tubular metal jacket, a terminal rigidly fastened to and insulated from the jacket, a winding ductile resistor arranged within the jacket and compressed upon, around and about the resistor.
  • An. electric heater complete in itself, comprising an elongated tubular metal 'acket, a terminal ri idly fastened to and insulated from the jac et, a winding resistor arranged within the jacket and connected to the terminal, and granular magnesium oxid compacted within the jacket and around and about the resistor.
  • a bendable electric heater complete in itself and having in combination an elongated bendable tubular metal jacket, terminals rigidly fastened to the jacket, one at each end thereof, a winding resistor arranged within the jacket and connected to the terminals, and insulation compacted around and about the resistor by crosswise contraction of the jacket.
  • An electric heater complete in itself, comprising an elongated tubular metal jacket, a helical resistor arranged therein,
  • terminals rigidly fastened to the jacket and connecte closing the ends thereof, and insulation compacted within the jacket and around and about the resistor to insulate the resistor from the jacket and hold it in place.
  • An electric heater complete in itself comprising an elongated tubular metal jacket, a helical resistor arranged therein, terminals rigidly fastened to the jacket and closing the ends thereof, and magnesium oxid compacted within the jacket and around and about the resistor to insulate the resistor from the jacket and hold it in place.
  • An electric heater complete in itself comprising an elongated tubular metal jacket, 0. elical resistor arranged therein terminals rigidly fastened to the jacket an closing the ends thereof and granular magnesium oxid compacte within the jacket and around and about the resistor to insulate the resistor from the jacket and holdit in place.
  • An electricheater complete in itself, comprising a helical resistor, insulation around and about the resistor, a tubular metal jacket surrounding the insulation and contracted crosswise to compress and compact the insulation, and terminals connected to the resistor and rigidly fastened to the jacket and closing the ends thereof.
  • An electric heater complete in itself, comprising a helical resistor, granular magnesium oxid around and about the resistor, a tubular metal jacket surrounding the insulation and contracted crosswise to compress and com act the insulation, and terminals to the resistor and rigidly fastened to the jacket and closing the ends thereof.
  • An electric heater complete in itself, comprising an elongated tubular metal jacket, a winding resistor arranged therein, insulation compacted within the jacket and around and about the resistor, a terminal fastened to the jacket, and a connector having greater conductivity than theresistor and connecting the resistor and the terminal.
  • An electric heater complete in itself, comprising a helical resistor, connectors provided at the ends of the resistor and having greater conductivity than the. resistor, insulation around and about the resistor, a tubular jacket surrounding the resistor, and terminals fastened to the jacket and attached to the connector.
  • An electric heater complete in itself comprisin a helical resistor, connectors provided at t e ends of the resistor and having greater conductivity than the resistor, insulation around and about the resistor, a jacket surrounding the insulation and contracted crosswise thereon to compress and compact'the same, and terminals fastened to the jacket and connected to the connectors.
  • An electric heater complete in itself comprising an elongated ductile tubular jacket, a helical resistor arranged within the jacket, granular insulation compacted withm the jacket and compressed upon the resistor to hold it and its convolutions in lace and to insulate the same, the jacket Being contracted crosswise to compact the insulation and compress it upon the resistor, and insulated terminals rigidl fastened to the jacket, one at each end t ereof, and having the resistor connected thereto.
  • a bendable electric heater complete in itself and havin in combination an elongated ductile tu ular metal jacket, terminals rigidly fastened to the jacket, one at each end thereof and insulated therefrom, a ductile helical resistor arranged within the jacket and connected to the terminals, and granular insulation compacted within the acket and compressed upon, around and about the resistor by crosswise contraction of the jacket.
  • An electric heater comprising an elongated ductile tubular metal jacket, a ductile helical resistor, arranged therein, insulation compacted within the jacket and compressed upon, around and about the resistor y crosswise contraction of the jacket to hold it in place and insulate it from the jacket and its convolutions from each other.
  • An electric heater comprising'an elonated ductile tubular metal jacket, a ductile elical resistor arranged therein, insulation compacted within the jacket and compressed upon the resistor to insulate it from the jacket and its convolutions from each other and hold it in lace, and terminals ri idly fastened to said from.
  • An electric heater comprising a winding resistor, insulation compressed upon said resistor, and an elongated tubular jacket surrounding said insulation and con traoted crosswise to compact said insulation and compress it upon said resistor.
  • An electric heater comprising a helical resistor, insulation compressed upon said resistor, and an elongated ductile tubular jacket surrounding said insulation and contracted crosswise to compact said insulation and compress it upon said resistor.
  • An electric heater complete in itself comprising a helical resistor, insulation compressed upon said resistor, an elongated tujacket and insulated t eresulation within the jacket tion compacted within the jacket and compressed upon, around and about the resistor by crosswise contraction of the jacket.
  • the process of making an electric heater which comprises assembling a helical resistor within and in spaced relation to a tubular meta-l jacket with granular in-. sulation therebetween, and contracting the jacket crosswise to compress and hold the in- 26.
  • a process of making an electric heater characterized by positioning a helical resistor within a tubular jacket, inserting insulation within the jacket and packing it around and about the resistor, and contract ing the jacket crosswise to compact further the insulation and compress it upon the resistor,.so that the resistor and its convolutions are firmly held in place and the resistor insulated from the jacket and its convolut-ions from each other.

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  • Resistance Heating (AREA)
US390920A 1920-06-22 1920-06-22 Electric heater Expired - Lifetime US1359400A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US390920A US1359400A (en) 1920-06-22 1920-06-22 Electric heater
DEC30468D DE416735C (de) 1920-06-22 1921-04-08 In sich vollstaendig biegsamer elektrischer Heizkoerper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US390920A US1359400A (en) 1920-06-22 1920-06-22 Electric heater

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Publication Number Publication Date
US1359400A true US1359400A (en) 1920-11-16

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US390920A Expired - Lifetime US1359400A (en) 1920-06-22 1920-06-22 Electric heater

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Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428900A (en) * 1940-10-21 1947-10-14 Wiegand Co Edwin L Electrical heating element
US2456343A (en) * 1944-12-06 1948-12-14 Tuttle & Kift Inc Electric heater and method of making same
US2477226A (en) * 1944-12-02 1949-07-26 Bulpitt & Sons Ltd Electric heating element
US2499961A (en) * 1948-04-30 1950-03-07 Gen Electric Electric heating unit
US2504146A (en) * 1939-01-16 1950-04-18 Mossin Georg Barth Electrical heating device
US2506554A (en) * 1944-12-06 1950-05-02 Tuttle & Kift Inc Hinged heating unit
US2507895A (en) * 1945-02-20 1950-05-16 Bendix Aviat Corp Sealing means
US2508512A (en) * 1949-01-13 1950-05-23 Phillips Mfg Company Inc Immersion-type heater
US2533615A (en) * 1947-01-04 1950-12-12 Mcgraw Electric Co Water heater
US2575113A (en) * 1951-11-13 Igniter
US2577080A (en) * 1949-05-31 1951-12-04 Irving G Glenn Electric heater
US2632087A (en) * 1950-09-28 1953-03-17 Julia Ann Memorial Company Utility burner
US2650287A (en) * 1951-12-05 1953-08-25 Gen Mfg And Distributing Compa Electric water heater
US2659799A (en) * 1950-09-20 1953-11-17 Mcgraw Electric Co Electric heating element
US2669636A (en) * 1951-05-21 1954-02-16 Gen Electric Sheathed electric heater insulating material
US2680188A (en) * 1950-02-21 1954-06-01 Gen Electric Electric paint burner
US2688685A (en) * 1951-10-29 1954-09-07 Paul H Goodell Sheath-resistance heater and panel supporting structures therefor which are built into heating devices
US2694930A (en) * 1950-06-22 1954-11-23 Weston Electrical Instr Corp Temperature measuring apparatus
US2703355A (en) * 1950-10-23 1955-03-01 Kanthal Corp Electric heater
US2703834A (en) * 1951-11-13 1955-03-08 Cutler Hammer Inc Tubular electric heater
US2718990A (en) * 1950-07-21 1955-09-27 Alsacienne Constr Meca Electrical cable manufacture
US2728833A (en) * 1953-03-26 1955-12-27 Bailey Meter Co Resistance thermometer
US2728832A (en) * 1953-03-26 1955-12-27 Bailey Meter Co Resistance thermometer
US2731532A (en) * 1951-08-03 1956-01-17 Graviner Manufacturing Co Temperature change detectors and method for producing same
US2808492A (en) * 1954-07-26 1957-10-01 Gen Electric Electric heating units and methods of making the same
US2816200A (en) * 1954-12-15 1957-12-10 Int Nickel Co Electrical heating unit
US2818631A (en) * 1952-08-16 1958-01-07 Syntron Co Sheathed electric heating elements
US2831909A (en) * 1956-12-03 1958-04-22 Donald W Kent Electrical resistance element and furnace containing the same
US2831950A (en) * 1954-06-10 1958-04-22 Lefebvre Fredrick Leon Radiant heater unit
US2844700A (en) * 1955-11-16 1958-07-22 Westinghouse Electric Corp Heating apparatus
US2844701A (en) * 1955-11-22 1958-07-22 Westinghouse Electric Corp Heating apparatus
US2861162A (en) * 1956-05-17 1958-11-18 John Van Inthoudt Methods of constructing sheathed electric heaters
US2862091A (en) * 1956-04-09 1958-11-25 Donald W Kent Resistance element and furnace containing the same
US2875312A (en) * 1956-09-27 1959-02-24 Thermel Inc Heating assembly and method of production thereof
US2880297A (en) * 1955-06-22 1959-03-31 Gen Electric Electric heating units
US2880298A (en) * 1958-06-02 1959-03-31 Gen Electric Electric heating units
US2882376A (en) * 1955-08-10 1959-04-14 Cutler Hammer Inc Electric heating units and methods of making the same
US2890318A (en) * 1955-08-24 1959-06-09 Ferro Corp Aluminum sheathed heating elements in aluminum die castings
US2898571A (en) * 1954-12-20 1959-08-04 Vickers Electrical Co Ltd Methods of manufacturing tubular sheathed heating elements
US2899663A (en) * 1959-08-11 Annularly bulged elkctric heating unit
US2937261A (en) * 1955-11-08 1960-05-17 Sunbeam Corp Electric cooking vessel and method of making same
US2947963A (en) * 1958-04-08 1960-08-02 Sterling A Oakley Sheathed heating element and process of making the same
US2958121A (en) * 1955-09-20 1960-11-01 Gen Electric Method of forming integral finned sheathed heaters
US2962684A (en) * 1958-11-12 1960-11-29 Gen Electric Sheathed electric heating units and methods of making the same
US3020386A (en) * 1959-06-10 1962-02-06 Naxon Irving Electric heaters
US3037746A (en) * 1958-11-10 1962-06-05 Wesley L Williams Floor covering for radiant heating installations
US3045326A (en) * 1955-04-28 1962-07-24 Graviner Manufacturing Co Temperature detectors
US3061806A (en) * 1960-07-26 1962-10-30 Bailey Meter Co Resistance thermometer
US3069752A (en) * 1959-02-06 1962-12-25 George H Roach Method of making a high temperature thermocouple
US3082511A (en) * 1957-11-14 1963-03-26 Gen Motors Corp Heating unit manufacture
US3173124A (en) * 1959-09-04 1965-03-09 Olin Mathieson Electric heaters
US3195093A (en) * 1961-11-01 1965-07-13 Gen Electric Sheathed electric heating units
US3245017A (en) * 1961-11-21 1966-04-05 Microdot Inc Strain gages and manufacture of same
US3245018A (en) * 1958-08-14 1966-04-05 Microdot Inc Strain gages
US3245016A (en) * 1960-06-15 1966-04-05 Microdot Inc Temperature compensated wire strain gage
US3281924A (en) * 1963-12-27 1966-11-01 Gen Electric Process for producing electrical resistance heaters
US3356834A (en) * 1964-05-11 1967-12-05 Hooker Chemical Corp Process and apparatus for storing heat
US4468556A (en) * 1982-08-09 1984-08-28 Emerson Electric Co. Electric heating elements
US6414281B1 (en) 1999-07-30 2002-07-02 Watlow Electric Manufacturing Company Hot-toe multicell electric heater

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750341C (de) * 1935-09-25 1945-01-06 Elektrisches Heizelement fuer Kochplatten u. dgl.
DE753450C (de) * 1935-12-14 1953-07-13 Theodor Stiebel Dipl Ing Dr Verfahren zur Herstellung elektrischer Rohrheizkoerper
DE1040141B (de) * 1952-07-21 1958-10-02 Schmidt Eltrolued & Co E Vorrichtung zum Herstellen von in Isoliermasse eingebetteten fuer Heizzwecke dienenden Drahtspiralen, insbesondere fuer Tauchsieder
SE8305218L (sv) * 1983-09-27 1985-03-28 Bulten Kanthal Ab Anordning for fyllning av rorelement

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575113A (en) * 1951-11-13 Igniter
US2899663A (en) * 1959-08-11 Annularly bulged elkctric heating unit
US2504146A (en) * 1939-01-16 1950-04-18 Mossin Georg Barth Electrical heating device
US2428900A (en) * 1940-10-21 1947-10-14 Wiegand Co Edwin L Electrical heating element
US2477226A (en) * 1944-12-02 1949-07-26 Bulpitt & Sons Ltd Electric heating element
US2456343A (en) * 1944-12-06 1948-12-14 Tuttle & Kift Inc Electric heater and method of making same
US2506554A (en) * 1944-12-06 1950-05-02 Tuttle & Kift Inc Hinged heating unit
US2507895A (en) * 1945-02-20 1950-05-16 Bendix Aviat Corp Sealing means
US2533615A (en) * 1947-01-04 1950-12-12 Mcgraw Electric Co Water heater
US2499961A (en) * 1948-04-30 1950-03-07 Gen Electric Electric heating unit
US2508512A (en) * 1949-01-13 1950-05-23 Phillips Mfg Company Inc Immersion-type heater
US2577080A (en) * 1949-05-31 1951-12-04 Irving G Glenn Electric heater
US2680188A (en) * 1950-02-21 1954-06-01 Gen Electric Electric paint burner
US2694930A (en) * 1950-06-22 1954-11-23 Weston Electrical Instr Corp Temperature measuring apparatus
US2718990A (en) * 1950-07-21 1955-09-27 Alsacienne Constr Meca Electrical cable manufacture
US2659799A (en) * 1950-09-20 1953-11-17 Mcgraw Electric Co Electric heating element
US2632087A (en) * 1950-09-28 1953-03-17 Julia Ann Memorial Company Utility burner
US2703355A (en) * 1950-10-23 1955-03-01 Kanthal Corp Electric heater
US2669636A (en) * 1951-05-21 1954-02-16 Gen Electric Sheathed electric heater insulating material
US2731532A (en) * 1951-08-03 1956-01-17 Graviner Manufacturing Co Temperature change detectors and method for producing same
US2688685A (en) * 1951-10-29 1954-09-07 Paul H Goodell Sheath-resistance heater and panel supporting structures therefor which are built into heating devices
US2703834A (en) * 1951-11-13 1955-03-08 Cutler Hammer Inc Tubular electric heater
US2650287A (en) * 1951-12-05 1953-08-25 Gen Mfg And Distributing Compa Electric water heater
US2818631A (en) * 1952-08-16 1958-01-07 Syntron Co Sheathed electric heating elements
US2728832A (en) * 1953-03-26 1955-12-27 Bailey Meter Co Resistance thermometer
US2728833A (en) * 1953-03-26 1955-12-27 Bailey Meter Co Resistance thermometer
US2831950A (en) * 1954-06-10 1958-04-22 Lefebvre Fredrick Leon Radiant heater unit
US2808492A (en) * 1954-07-26 1957-10-01 Gen Electric Electric heating units and methods of making the same
US2816200A (en) * 1954-12-15 1957-12-10 Int Nickel Co Electrical heating unit
US2898571A (en) * 1954-12-20 1959-08-04 Vickers Electrical Co Ltd Methods of manufacturing tubular sheathed heating elements
US3045326A (en) * 1955-04-28 1962-07-24 Graviner Manufacturing Co Temperature detectors
US2880297A (en) * 1955-06-22 1959-03-31 Gen Electric Electric heating units
US2882376A (en) * 1955-08-10 1959-04-14 Cutler Hammer Inc Electric heating units and methods of making the same
US2890318A (en) * 1955-08-24 1959-06-09 Ferro Corp Aluminum sheathed heating elements in aluminum die castings
US2958121A (en) * 1955-09-20 1960-11-01 Gen Electric Method of forming integral finned sheathed heaters
US2937261A (en) * 1955-11-08 1960-05-17 Sunbeam Corp Electric cooking vessel and method of making same
US2844700A (en) * 1955-11-16 1958-07-22 Westinghouse Electric Corp Heating apparatus
US2844701A (en) * 1955-11-22 1958-07-22 Westinghouse Electric Corp Heating apparatus
US2862091A (en) * 1956-04-09 1958-11-25 Donald W Kent Resistance element and furnace containing the same
US2861162A (en) * 1956-05-17 1958-11-18 John Van Inthoudt Methods of constructing sheathed electric heaters
US2875312A (en) * 1956-09-27 1959-02-24 Thermel Inc Heating assembly and method of production thereof
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