US3691348A - Heating element assembly - Google Patents

Heating element assembly Download PDF

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Publication number
US3691348A
US3691348A US186959A US3691348DA US3691348A US 3691348 A US3691348 A US 3691348A US 186959 A US186959 A US 186959A US 3691348D A US3691348D A US 3691348DA US 3691348 A US3691348 A US 3691348A
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US
United States
Prior art keywords
heating element
panel
electrical resistance
panels
notches
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
US186959A
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English (en)
Inventor
Raymond W Kunz
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
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3691348A publication Critical patent/US3691348A/en
Assigned to BLACK & DECKER, INC., A CORP. OF DE reassignment BLACK & DECKER, INC., A CORP. OF DE ASSIGNS AS OF APRIL 27, 1984 THE ENTIRE INTEREST Assignors: GENERAL ELECTRIC COMPANY A NY CORP.
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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/32—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulators on a metallic frame

Definitions

  • This invention relates to a heating element assembly, and more particularly to an electrical resistance heating element assembly utilized in portable electric space heaters.
  • portable electric space heaters have a minimum number of parts and that these parts be inexpensive to manufacture. In line with this, it is also desirable that the parts can be quickly and easily assembled. Further, since electric space heaters are frequently moved, it is essential that the heater components, in general, and the electrical resistance heating element assembly in particular is sufficiently rugged to withstand minor shocks caused by dropping and so forth. This requirement is also important with respect to handling and shipping of electric space heaters.
  • the electrical resistance heating element assembly should be constructed such that the electrical resistance heating element has minimum tension while providing positive location and retention of the heating element in its proper position within the assembly. Minimum tension is desired to reduce the tendency of the heating element to move or creep resulting from expansion and contraction caused by heating and cooling of the heating element during operation of the heater. Movement of the heating element is undesirable as it becomes distorted, interferes with positive securement of the heating element to insulating members, and, if sufficient, could come into contact with adjacent coils or other metal parts and cause electrical failure within the heater. It is also important that the heating element assembly be constructed as a unit with a minimum amount of labor and component parts and that the unit is easily incorporated into the heater during its manufacture.
  • an electrical'resistance heating element assembly having a support structure comprising a top panel and a bottom panel in a spaced relationship with end panels extending between the top and bottom panels.
  • the end panels have outwardly directed open-ended notches spaced vertically along the periphery of each panel.
  • An electrical resistance heating element is wrapped around the end panels and retained in the peripheral notches to provide horizontal runs of spaced heating element across the open front and open rear of the support structure.
  • Retainer members located at the front and rear of the assembly are secured to the top and bottom panels with the retainer members having inwardly directed open-ended vertically spaced notches that engage the runs of heating element between the end panels such that the heating element is slightly depressed inwardly by the retainer members to thereby retain the runs of the heating element in their proper spaced position.
  • FIG. I is a perspective view of the electrical resistance heating element assembly.
  • FIG. 2 is an exploded perspective view of the electri- DESCRIPTION OF THE PREFERRED EMBODIMENT
  • an electrical resistance heating element assembly generally shown at 10 that includes a support structure comprising a top panel 12 and a bottom panel 14 in spaced relationshipwith a right end panel 16 and left end panel 18. These end panels have outwardly directed open-ended notches l9 spaced vertically along the periphery on both sides.
  • an intermediate or center panel 20 which has outwardly directed semi-circular open-ended notches 21 spaced vertically along the periphery on both sides.
  • the end panels 16 and 18 and center panel 20 are made from a sheet of electric insulating material, such as mica board.
  • Both the top panel 12 and the bottom panel 14 are made from suitable sheet metal and they are identical so that they may be interchanged during manufacture of the heating element assembly. Both the top and bottom panel have slots 22 located at each end thereof. The end panels 16 and 18 are also identical and have tongue extension portions 24 located at the top and bottom with the tongue extension portions 24 dimensioned to be received within the slots 22 in both the top and bottom panels. Both the top and bottom panels 12 and 14 have a centrally located opening 26 that results from each panel being lanced so that the metal may be bent at a right angle to the panel to provide a depending tab 28. This tab 28 is used for securing the center panel 20 to both the top panel 12 and bottom panel 14 as by rivets screws 30 through the tab 28 and center panel 20.
  • the support structure includes the top panel 12, bottom panel 14, end panels 16 and 18, and center panel 20.
  • the front and rear of the support structure is open to allow the passage of air therethrough.
  • the electrical resistance heating element assembly may have secured to the top panel 12 a thermostat or temperature responsive switch assembly 32 which is utilized to control energization of the heating element depending upon the temperatures desired.
  • the switch assembly 32 is secured to top panel 12 by a rivet or nut 34 and bolt 35 through the switch assembly and hole 35 in top panel 12.
  • Top panel 12 has a cut-out opening 36 underlying the switch assembly 32 to allow heat from within the heating element assembly to be readily transferred to the switch assembly 32. While the temperature responsive switch assembly is not part of this invention it is nevertheless shown because if such a switch assembly is to be used it would be secured to the heating element assembly prior to incorporation of the heating element assembly into an electric space heater.
  • an electrical resistance heating element 38 which may be in the form of a resistance wire helically wound to form an elongated length of coiled resistance wire. Prior to winding the heating element on the support structure the heating element is pre-stretched and annealed to minimize tension of the heating element.
  • the heating element 38 is secured at one end to terminal 40 on end panel 16, which terminal also is connected to an outside electrical power source through lead wire 42. From terminal 40 the heating element 38 is inserted into the outwardly directed notches 19 on the periphery of end panel 16 and then extends from end panel 16 to corresponding outwardly directed notches 19 in the opposite end panel 18.
  • the notches 19 are only slightly larger than the diameter of the wire used to form the coiled heating element to aid in retaining the heating element in its proper location by minimizing the possibility of movement of the wire in the notches 19.
  • the heating element is in close proximity to the outwardly directed semi-circular open-ended notches 21 in the periphery of center panel 20.
  • the diameter of notches 21 is slightly larger than the outside diameter of the coiled wire heating element 38.
  • the heating element is continued to be wound around the support structure in this fashion to provide a plurality of horizontal runs of heating element extending from one end panel to the other across the open front and open rear of the support structure.
  • the runs of heating element at the front and rear are not on the same horizontal plane but rather the runs at the front of the heating element lie in a plane between the rear heating element runs. This arrangement affords more even distribution of the heating element surface exposed to the air passing through the heating element assembly from the rear to the front.
  • the end of the heating element is terminated at terminal 45 on end panel 18 in the same fashion as previously described for end panel 16.
  • any number of separate heating element lengths may be utilized and connected to end panels 16 and 18 at appropriate terminals to provide variation in heat output by energizing the various heating element lengths.
  • three separate lengths of resistance wire are used all joined in parallel electrical connection to provide through switch means two different outputs of heat.
  • sections 45 of the heating element 38 are stretched to an extent that they will lie relatively flat against the end panels after winding on the support structure.
  • retainer members 44 are installed.
  • keyhole-shaped slots 50 are formed in the top and bottom panels 12- and 14. These slots 50 are located intermediate the end panels and center panel and inboard of the runs of heating element.
  • Retainer members 44 are made of flatmica board or other suitable electric insulating material and have tab projections 48 at each end and open-ended semi-circular notches 46 along one edge, which notches are slightly larger in diameter than the coiled heating element.
  • the width of the retainer members 44 is slightly smaller than the length of the keyhole-shaped slots 50 and the thickness is also slightly less than the width of the slots 50 so that the retainer members 44 may be slipped down through the slots 50 in top panel 12.
  • the runs of heating element are depressed inwardly to permit the retainer member to be positioned outboard of the runs of heating element.
  • the bottom retainer member tab projection 48 will seat in the circular portion of keyhole-shaped slots 50 formed in the bottom panel 14 It should be noted that the tab projections 48 are slightly smaller in width than the circular portion of keyhole-shaped slots 50 to allow rotation of the retainer members with the tab projections seated in the circular portion of the slots 50 in both the top panel 12 and bottom panel 14.
  • the notches 46 are urged against the runs of heating element 38 to retain the heating element depressed inwardly between the end panels 16 and 18 and the central panel 20.
  • the heating element has a zig-zag contour from one end of the support structure to the other as can be readily seen in FIG. 3.
  • shoulder 52 of the tab projections 48 on retainer members 44 is located in a vertical plane inwardly of the vertical plane passing through the rear of notches 21.
  • the distance between these two plans is designated D in FIG. 4.
  • the heating element assembly After construction of the heating element assembly it may be incorporated into an electric portable space heater with normal electrical connections to accomplish the intended function of the heater.
  • An electrical resistance heating element assembly comprising: Y
  • a support structure having a top panel and a bottom panel in spaced relationship with end panels made of electric insulating material secured to the top and bottom panels and extending therebetween, said end panels having outwardly directed open-ended notches spaced vertically along the periphery of said end panels,
  • retainer members made of electric insulating material at the front and the rear located between the end panels and secured to the top and bottom panels, said retainer members having inwardly directed open-ended vertically spaced notches and engaging said heating element to slightly depress the heating element inwardly.
  • each retainer member has a tab projection at each end and the top and bottom panels have keyhole-shaped slots, said tab projections cooperate with the slots to allow insertion of the retainer members through the slots in one of the panels and the tab projections to be seated in the slots of the top and bottom panel for subsequent rotation of the retainer member.
  • An electrical resistance heating element assembly comprising:
  • a support structure having a top panel and a bottom panel in spaced relationship andsecured toend panels and a center panel extending therebetween, said end panels and center panel being made of electric insulating material and having outwardly directed open-ended notches spaced vertically along the periphery thereof, an electrical resistance heating element wrapped around the end panels and center panel and seated in sai outwa rdly directed notches to provide space runs 0 heating element across the open front and open rear of the support structure, and
  • retainer members at the front and the rear of the support structure located between the end panels and center panel secured to the top and bottom panels, said retainer members being made of electric insulating material and having inwardly directed open-ended vertically spaced notches to receive the heating element and engaging said heating element to slightly depress the heating element inwardly.
  • each retainer member has a tab projection at each end and the top and bottom panels have keyhole-shaped slots, said tab projections cooperate with the slots to allow insertion of the retainer members through the slots in one panel and the tab projections to be seated in the slots of the top and bottom panel for subsequent rotation of the retainer member.
  • top and bottom panels are made of sheet metal.
  • An electrical resistance heating element assembly comprising:
  • a support structure having a metal top panel and a metal bottom panel secured in spaced relationship with end panels and a center panel extending therebetween, said end and center panels being electrically insulating and having outwardly directed open-ended notches spaced vertically along the periphery thereof and said top and bottom panel having keyhole-shaped slots,
  • an electrical resistance heating element coiled wire wrapped around the end panels and center panel and seated in said outwardly directed notches to provide spaced runs of heating element across the open front and open rear of the support structure
  • vertical retainer members being electrically insulating and having tab projections at both ends and located at the front and the rear of support structure between the end panels and center panel removably secured to the top and bottom panels in said keyhole-shaped slots, said retainer members having inwardly directed open-ended vertically spaced notches to receive the heating element and engaging said heating element to slightly depress the heating element inwardly.

Landscapes

  • Resistance Heating (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Surface Heating Bodies (AREA)
US186959A 1971-10-06 1971-10-06 Heating element assembly Expired - Lifetime US3691348A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18695971A 1971-10-06 1971-10-06

Publications (1)

Publication Number Publication Date
US3691348A true US3691348A (en) 1972-09-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US186959A Expired - Lifetime US3691348A (en) 1971-10-06 1971-10-06 Heating element assembly

Country Status (3)

Country Link
US (1) US3691348A (enrdf_load_stackoverflow)
JP (1) JPS4845935A (enrdf_load_stackoverflow)
CA (1) CA954921A (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783635A (en) * 1972-07-25 1974-01-08 Dunham Bush Inc Replaceable defrost heater for fin and tube evaporator and spring retaining clip for same
US3860789A (en) * 1973-03-26 1975-01-14 Gould Inc Heating element assembly
FR2293845A1 (fr) * 1974-12-07 1976-07-02 Eichenauer Fritz Element chauffant pour appareils electriques munis d'un ventilateur
US4079233A (en) * 1975-01-22 1978-03-14 Firma Fritz Eichenauer Heating element for electrical appliances having a blower
US4250399A (en) * 1979-01-22 1981-02-10 Emerson Electric Co. Electric heating elements
US4268742A (en) * 1979-10-17 1981-05-19 E. R. Wagner Manufacturing Company Resistance heater assembly
DE3300182A1 (de) * 1983-01-05 1984-07-05 Heinrich Platthaus, Ing.,Elektrotechnische Fabrik, 5653 Leichlingen Elektrisches widerstands- oder heizgitter
US4472624A (en) * 1982-06-10 1984-09-18 Emerson Electric Co. Electric resistance heater
DE8809561U1 (de) * 1988-07-27 1988-12-08 Braun Ag, 6000 Frankfurt Elektroheizkörper
US5578232A (en) * 1995-05-04 1996-11-26 Hart & Cooley, Inc. Open-coil heater assembly and insulator therefor
US5925273A (en) * 1997-10-20 1999-07-20 Tutco, Inc. Electric multi-stage heater assembly
US6351602B1 (en) * 1992-12-21 2002-02-26 The W. B. Marvin Manufacturing Company Upright radiant electric heating appliance
US20040182853A1 (en) * 2003-03-21 2004-09-23 Howard H. Keith Mica board electrical resistance wire heater, subassemblies, components, and methods of assembly
DE102004023099B4 (de) * 2003-06-25 2005-08-25 Türk & Hillinger GmbH Heizregister
DE102005012731A1 (de) * 2005-03-19 2006-09-21 Eichenauer Heizelemente Gmbh & Co. Kg Luftheizer
WO2015090720A1 (en) * 2013-12-20 2015-06-25 Tetra Laval Holdings & Finance S.A. A sterilizing unit comprising a heater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458141A (en) * 1980-11-14 1984-07-03 Tutco, Inc. Electric heater and coil support insulator therefor
JPS5821994U (ja) * 1981-08-04 1983-02-10 株式会社日立ホームテック 加熱装置

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783635A (en) * 1972-07-25 1974-01-08 Dunham Bush Inc Replaceable defrost heater for fin and tube evaporator and spring retaining clip for same
US3860789A (en) * 1973-03-26 1975-01-14 Gould Inc Heating element assembly
FR2293845A1 (fr) * 1974-12-07 1976-07-02 Eichenauer Fritz Element chauffant pour appareils electriques munis d'un ventilateur
US4079233A (en) * 1975-01-22 1978-03-14 Firma Fritz Eichenauer Heating element for electrical appliances having a blower
US4250399A (en) * 1979-01-22 1981-02-10 Emerson Electric Co. Electric heating elements
US4268742A (en) * 1979-10-17 1981-05-19 E. R. Wagner Manufacturing Company Resistance heater assembly
US4472624A (en) * 1982-06-10 1984-09-18 Emerson Electric Co. Electric resistance heater
DE3300182A1 (de) * 1983-01-05 1984-07-05 Heinrich Platthaus, Ing.,Elektrotechnische Fabrik, 5653 Leichlingen Elektrisches widerstands- oder heizgitter
DE8809561U1 (de) * 1988-07-27 1988-12-08 Braun Ag, 6000 Frankfurt Elektroheizkörper
US6351602B1 (en) * 1992-12-21 2002-02-26 The W. B. Marvin Manufacturing Company Upright radiant electric heating appliance
US5578232A (en) * 1995-05-04 1996-11-26 Hart & Cooley, Inc. Open-coil heater assembly and insulator therefor
US5925273A (en) * 1997-10-20 1999-07-20 Tutco, Inc. Electric multi-stage heater assembly
US20040182853A1 (en) * 2003-03-21 2004-09-23 Howard H. Keith Mica board electrical resistance wire heater, subassemblies, components, and methods of assembly
US6884974B2 (en) * 2003-03-21 2005-04-26 Tutco, Inc. Mica board electrical resistance wire heater, subassemblies, components, and methods of assembly
DE102004023099B4 (de) * 2003-06-25 2005-08-25 Türk & Hillinger GmbH Heizregister
DE102005012731A1 (de) * 2005-03-19 2006-09-21 Eichenauer Heizelemente Gmbh & Co. Kg Luftheizer
DE102005012731B4 (de) * 2005-03-19 2015-01-08 Eichenauer Heizelemente Gmbh & Co. Kg Luftheizer
WO2015090720A1 (en) * 2013-12-20 2015-06-25 Tetra Laval Holdings & Finance S.A. A sterilizing unit comprising a heater
CN105873827A (zh) * 2013-12-20 2016-08-17 利乐拉瓦尔集团及财务有限公司 一种包含加热器的灭菌装置
US10293964B2 (en) 2013-12-20 2019-05-21 Tetra Laval Holdings & Finance S.A. Sterilizing unit comprising a heater

Also Published As

Publication number Publication date
JPS4845935A (enrdf_load_stackoverflow) 1973-06-30
CA954921A (en) 1974-09-17

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AS Assignment

Owner name: BLACK & DECKER, INC., 1423 KIRKWOOD HIGHWAY NEWARK

Free format text: ASSIGNS AS OF APRIL 27, 1984 THE ENTIRE INTEREST;ASSIGNOR:GENERAL ELECTRIC COMPANY A NY CORP.;REEL/FRAME:004349/0275

Effective date: 19840824

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)