Ventilated Helical Or Zigzag Element Patents (Class 338/58)
  • Patent number: 11781459
    Abstract: A heating unit for an exhaust-gas system of an internal combustion engine includes a heating-unit housing for conducting an exhaust-gas in a main flow direction. A plurality of heating elements are arranged in the heating-unit housing and are shaped in a meandering manner. Each heating element has a plurality of plate-like heating sections which follow one another in a heating-element longitudinal direction. The heating sections of each heating element are connected to one another via respective connecting sections. Each heating element has two connection regions which are arranged at a distance from one another. In each connection region, the heating elements are electrically conductively connected to a connection region of a further heating element.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: October 10, 2023
    Assignee: Purem GmbH
    Inventor: Gerd Gaiser
  • Patent number: 9930950
    Abstract: A device comprises a fan, a motor configured to operate the fan for moving air, a heating coil configured to heat air moved based on operation of the fan, a first arm, a second arm and a coupler. The first arm is configured to move air through the first arm based on operation of the fan. The second arm is configured to receive air moved through the first arm, heat received air using the heating coil, and expel heated air through an outflow opening of the second arm. The coupler couples the first arm to the second arm. The coupler is configured to orient the second arm in one of multiple positions relative to the first arm, and also configured to receive air from the first arm and transfer received air to the second arm through inflow and outflow openings respectively associated with the coupler.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: April 3, 2018
    Inventor: Kailyn Cage
  • Patent number: 7102484
    Abstract: A high power resistor includes a resistance element with first and second leads extending out from the opposite ends thereof. A heat sink of dielectric material is in heat conducting relation to the resistance element. The heat conducting relationship of the resistance element and the heat sink render the resistance element capable of operating as a resistor between the temperatures of ?65° C. to +275° C. The heat sink is adhered to the resistance element and a molding compound is molded around the resistance element.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: September 5, 2006
    Assignee: Vishay Dale Electronics, Inc.
    Inventors: Greg Schneekloth, Nathan Welk, Brandon Traudt, Joel Smejkal, Ronald J. Miksch, Steve Hendricks, David L. Lange
  • Patent number: 6747543
    Abstract: A resistor for driving a motor for an air conditioner blower is provided, in which internal resistance bodies are stacked over one after another between insulation plates in the resistor, to accordingly reduce the volume of the entire of the resistor is reduced, and the resistance bodies are separated into a plurality of metal thin plates not a single plate and stacked over one after another, to thereby increase a line width. Also, a temperature fuse is disposed externally. The air conditioner fan blower motor driving resistor is obtained by stacking resistance bodies made of at least two metal thin plates over one after another. The resistance bodies are formed of an independent resistance body forming a second resistance body and a third resistance body on two separate thin plates, and another independent resistance body forming a first resistance body on another thin plate.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: June 8, 2004
    Assignee: Dong
    Inventor: Peong Ju Lim
  • Patent number: 6430045
    Abstract: Resistor bank cooling apparatus 1 has an enclosure 2 surrounding a resistor bank 4. At least one first vane 6 directs into the enclosure 2 air flowing past an open side 12 thereof, which open side 12 is not a side facing the direction from which the air flowing past the enclosure 2 flows. The resistor bank 4 has a resistor element 22 which functions as at least one airflow directing baffle. The or each first vane 6 and the or each baffle are each disposed thereby to create an air flow through the enclosure 2 which achieves a sufficiently even cooling of the resistor bank 4. At least one second vane 60 to the side of the or each first vane 6 remote from the open side 12 captures and deflects into the enclosure 2 air which ‘bounces off’ the closed facing sides.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: August 6, 2002
    Assignee: Cressall Resistors Limited
    Inventor: Alwyn John Everitt
  • Patent number: 6166619
    Abstract: Current limiters, preferably PTC resistors, are used for limiting short-circuit current when connected in series to capacitors and converter valves. Protective devices operating with these PTC resistors are able to work reversibly and respond without arcing. They have a low inductance and can be used in space-saving designs. Protective circuits with such PTC resistors have a low loss, are shake-proof, and can be integrated into an existing cooling circuit. They respond autonomously and enable a flexible application. The PTC resistors preferably are constructed in a meander shape of porous metal foam or a metal braid or fabric and have electrical contact bridges between their resistor tracks. At least 2 resistor tracks that are electrically connected in parallel are arranged at a small distance on top of each other in such a way that partial currents (I1, I2) flow in opposite directions through resistor branches in superposed track areas formed in this manner.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: December 26, 2000
    Assignee: DaimlerChrysler AG
    Inventors: Tudor Baiatu, Peter Etter, Reinhard Fried, Hans-Jurg Wiesmann
  • Patent number: 6081183
    Abstract: A continuous ribbon resistor element having a plurality of conjunctive lengths alternately connected by reflexes is supported in a frame comprised of silicon bonded laminated mica. The ribbon elements are formed with a single, flat convolution center offset to one side of an original plane and lateral portions offset to an opposite side of the plane, joined to the center offset by transition portions such that the centroid for any transverse cross section lies on the original plane. The offsets originate at flat end portions near the reflexes and have maximum offset intermediate the ends. Metal members are received in openings of the laminated mica insulators to receive threaded fasteners when attaching an insulator in edge-wise relationship to another. Thermally conductive termination connections are brought outside the frame and airflow passageway to remove from the passageway the additional heat otherwise absorbed by the terminals.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: June 27, 2000
    Assignee: Eaton Corporation
    Inventors: James E. Mading, William R. Luy, John S. Jackson
  • Patent number: 5619612
    Abstract: A motor is located in the air inlet area is enclosed in a shock proof housing. The housing is of a cylindrical configuration, comprising a solid rear wall and a front wall which contains air inlet openings small enough to prevent access to the live electrical parts, the enclosure is further provided with a circumferential air outlet positioned between the front and rear walls. A motor is located in the air inlet area to facilitate its cooling by the entering air. A centrifugal blower impeller is mounted on the blower shaft, with its inlet coinciding with the inlet opening. The impeller is surrounded by a cage shaped heating element consisting of a multitude of inter connected strips of a resistance alloy, which are supported on two plastic rings. The circumferential air outlet is provided with a multitude of guide vanes that help direct and diffuse the air emanating from the heating elements while preventing contact with the heating element from the outside.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: April 8, 1997
    Assignee: Appliance Development Corp.
    Inventors: Dov Z. Glucksman, John A. Deros
  • Patent number: 5488334
    Abstract: The power loads in certain applications such as dummy antennas must have a substantially constant impedance in a wide band of frequencies. The power load is air-cooled and its resistive element is constituted by the series-connection of resistor modules made of expanded metal. Capacitors are positioned in a branching connection on the resistive element. The positioning of the capacitors along the resistive element and their value are determined to ensure frequency compensation.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: January 30, 1996
    Assignee: Thomcast
    Inventor: Ivan Wolk
  • Patent number: 5334818
    Abstract: A heating element for an air flow comprises a channel shaped bracket including a base and side walls at right angles thereto within which is mounted a pair of mica sheets arranged parallel to the base and at right angles to the sides and connected to the sides by ribs longitudinally of the sides with transverse slots within which the sheets slide. Each sheet is wrapped with a heating wire formed into helical coils so that each side of the sheet carries a plurality of parallel helical coil portions with connecting portions wrapped over the edges of the sheet. The sheets are symmetrical and one is inverted relative to the other. Each sheet carries at ends thereof a male and a female connector of the blade and receptacle type so that the blade of one sheet engages into the receptacle of the other sheet.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: August 2, 1994
    Assignee: Temro Division, Budd Canada Inc.
    Inventors: Gary C. Edwards, Ronald H. Schaefer
  • Patent number: 5281944
    Abstract: A resistor grid for dynamic braking of diesel electric locomotives has a rigid frame that includes outer metal side pieces and metal dividers within the frame between which are positioned columns of fan-folded resistor ribbon. The dividers carry support plates having transverse aligned tabs along both sides fixed normal to the support plate, each tab having a notch in its inside edge, and supported plates for the resistor ribbon which slide in those slots longitudinally. The supported plates and the folds of the resistor ribbon carry studs and bushings which interfit by movement normal to those plates.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: January 25, 1994
    Assignee: Mosebach Manufacturing Company
    Inventors: Victor V. Kirilloff, Robert Cummins, Richard S. Dawson, William A. Benson
  • Patent number: 5157373
    Abstract: A high power resistor grid assembly formed of a plurality of stainless steel resistor U-shaped elements arranged in a substantially parallel relationship welded together in a continuous path. Each element comprising a slotted rectangular sheet in a U-shape having elongated curved embossments to prevent warpage of the element upon heating. Each U-shaped element has alternately a right and left leg offset to permit end to end attachments of elements while maintaining uniform spacing between the elements. The elements are supported by pairs of double insulated members which are affixed to the top and bottom of a frame with a floating end to permit expansion of the assembly upon heating and contraction upon cooling.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: October 20, 1992
    Assignee: Post Glover Resistors, Inc.
    Inventors: John R. Bertram, David W. Allen
  • Patent number: 5134270
    Abstract: A heater assembly (10) is for installation in a clothes dryer (D). The assembly includes at least one open coil heating element (12), and a plurality of insulators (16) to each of which a convolution of the coil is attachable. The insulators are mounted on a support (22) in a spaced relation from each other. The support is attachable to a multi-sided pan structure (30). The pan has sidewalls (32A, 32B) to which the support is attachable for installing the coil in the pan. The pan has a lip (54) which extends beneath one end (54) of a heating unit (U) section (S2). The pan is directly attachable to the unit and the unit directly installable in the dryer. The heater assembly is also formed to help install the unit in the appliance during its manufacture.
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: July 28, 1992
    Assignee: Emerson Electric Co.
    Inventors: Jackie J. Bragg, Richard D. Graham, Bill Sowder, Jimmy R. Tate, Robert N. Lewellen, Charles E. Bryson, Jr., Griva Darwin R.
  • Patent number: 5068637
    Abstract: For use in a welded resistor grid assembly moving a plurality of generally parallel, relatively think plate-like metal elements disposed between a pair of spaced-apart insulating support members having a plurality of slotted openings in their opposing sidewalls, a metal element having a substantially rectangular plate-like body of predetermined width, a coplanar flat segment of the same width at one end of the body, a laterally offset flat segment of the same width at the opposite end of the body, the upraised side of the later segment having a flat surface adapted to be joined by a seam weld to the flat surface of the other side of the coplanar segment of another duplicate element after two such elements are placed side by side with opposite orientation so that the offset flat segment of one adjoins the coplanar flat segment of the other, and a border segment of the same width contiguous and generally coplanar with a first one of the flat segments, the border segment being adapted to enter a slotted opening
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: November 26, 1991
    Assignee: General Electric Company
    Inventor: Eric W. Bayer
  • Patent number: 5034721
    Abstract: The invention relates to a method of manufacturing a heating element from a flat metal foil blank in which strips (1) are formed whose ends (2) are interconnected by connecting portions (3, 4) with alternate connecting portions disposed at opposite ends of the strips so as to form a meandering pattern and to a heating appliance incorporating such a heating element. In order to make such a foil heating element suitable for use in appliances in which an air stream to be heated passes over the foil heating element the connecting portions (3, 4) are bent in such a way that the strips (1) are tilted out of the plane of the foil blank. Preferably the strips are disposed an an angle .alpha. between 45.degree. and 90.degree. relative to the plane.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: July 23, 1991
    Assignee: U.S. Philips Corp.
    Inventor: Jan H. Benedictus
  • Patent number: 4935687
    Abstract: An electrical heat exchange device comprising a plurality of electrically conductive metal plates secured side by side in spaced apart relationship by electrically insulating spacer means. Each of the plates has a plurality of conductive path sections formed therein so that current will flow along a predetermined elongated path through the plate. The plates have a plurality of perforations, at least along the elongated path for the passage of a fluid conducted therethrough under pressure whereby to heat the fluid by the plurality of plates. The perforations decrease the conductive cross-section area thereby increasing the electrical resistance of the plate. Electrical connectors are provided for connecting the plates in series with one another at opposed ends of the elongated path. Connectors are provided for connecting the series of plates to an electrical power source for heating the plates by joule effect.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: June 19, 1990
    Assignee: Hydro-Quebec
    Inventors: Ouoc-Anh Ton-That, Daniel Maure, Jacques Frate
  • Patent number: 4847585
    Abstract: A resistor grid for diesel electric locomotives and the like has a rigid frame comprising outer metal side pieces and one or more pairs of inner metal side pieces spaced from each other, and columns of resistor ribbon fan-folded between each outer and outermost inner side piece, and between certain inner side pieces. Supporting means interengaging each fold of the ribbons are insulated from and carried on each side by a metal strip which rides on its adjoining side piece so as to accommodate expansion of the resistor ribbon. The ribbon is indented between folds to stiffen it and increase its span and may by provided with a support rod centered between its side pieces. The resistor grid is preferably positioned in forced air cooled resistor banks face-to-face with conventional narrow span grids, and improves the cooling of such conventional banks.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: July 11, 1989
    Assignee: Mosebach Manufacturing Company
    Inventors: Victor V. Kirilloff, William A. Benson, Robert Cummins, Richard S. Dawson
  • Patent number: 4794227
    Abstract: A resistance heater element for an electric room heater includes a resistive heating conductor (1) supported by an insulating support (2) mounted on the support flange (9) of an electric fan (4) in the heater which passes a stream of room air across the conductor (1). The insulating support (2) is cylindrical, with its axis parallel to the direction of the air stream, and includes at least one pair of nested mica bands (5, 5') bound together by fillets (6) connected to the support flange (9). The heating conductor (1) comprises at least one wire of resistive material bent in a zig-zag manner to form a plurality of radial loops each having portions extending inwardly and outwardly of the cylindrical bands (5, 5'). The central portion (11) of each loop is bent over and retained between the pair mica bands (5, 5') with the inner portion of each loop emerging radially from the inner band (5) through apertures (13) provided therein.
    Type: Grant
    Filed: January 13, 1988
    Date of Patent: December 27, 1988
    Assignee: R.I.C.A. Resistenze Industriali Corazzate E
    Inventors: Giansante Antoniazzi, Claudio Fattorel
  • Patent number: 4734824
    Abstract: An electrical insulating oil which is suitable for use in impregnating electrical appliances such as capacitors, cables and transformers, especially those in which plastic materials are used partially or totally as dielectrics or insulating materials, and electrical appliances that are impregnated with the above electrical insulating oil. The electrical insulating oil of the invention contains at least one monoolefin and/or diolefin having three condensed or non-condensed aromatic rings.
    Type: Grant
    Filed: June 23, 1986
    Date of Patent: March 29, 1988
    Assignee: Nippon Petrochemicals Company, Limited
    Inventors: Atsushi Sato, Keiji Endo, Shigenobu Kawakami, Hitoshi Yanagishita, Shozo Hayashi
  • Patent number: 4651125
    Abstract: A grid assembly for converting electrical energy to heat and then dissipating same. A plurality of parallel grid members include outwardly extending legs received in holes provided on mutually facing surfaces on polyester glass insulator members. The grid members are arranged in a continuous serpentine path from an input to an output terminal. The grid members are of sheet metal construction with the cylindrical legs formed by a radiused sheet metal configured leg portion of one grid member positioned adjacent an identical configured and mutually opposed leg portion of an adjacent grid member. The main body of each grid member extends from the legs through a flat portion and then through a diverging end portion spacing the main bodies of the grid members apart. In an alternate embodiment, the grid members are arranged with different lengths to provide a particular sized and configured grid assembly.
    Type: Grant
    Filed: July 17, 1986
    Date of Patent: March 17, 1987
    Assignee: Dynamic Corporation
    Inventor: Jack A. Harkness
  • Patent number: 4630024
    Abstract: A grid resistor assembly includes a plurality of flat grid resistor elements. Each element includes at least one open-ended loop having side portions and a tip end portion connected together through intervening strip portions of narrower width than the side portions to improve current carrying capacity and to provide for more even heating and heat dissipation. An assembly of such elements is particularly used as a resistor box in an electric, motor-driven, transit vehicle, such as a subway car, and is provided in a predetermined space envelope to perform predetermined electrical parameters.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: December 16, 1986
    Assignee: Post-Glover Resistors, Inc.
    Inventor: David W. Allen
  • Patent number: 4398082
    Abstract: An improved heating apparatus for heating a small room or confined space has an electric heater element affixed to a mounting frame assembly by means of notched heater element supports. The notched heater element supports are operably disposed within slots located around the periphery of the mounting frame assembly. When the heater element is strung through the supports, and stretched therebetween, the supports are biased into a locked position. Cool air is drawn through louvers located in the side panels of the upper housing portion and blown through the mounting frame assembly by a fan located at the rear of the apparatus housing. The cool air is warmed by the heater element and warm air is blown through a front grill attached to the front panel of the apparatus housing.
    Type: Grant
    Filed: March 9, 1981
    Date of Patent: August 9, 1983
    Assignee: Aubrey Manufacturing, Inc.
    Inventor: Robert Johannsen
  • Patent number: 4191880
    Abstract: A heating element for electrical appliances which include a meander-form winding of resistance heating wire, two or more supporting plates arranged parallel to an incident flow direction of air produced by the blower and having openings in which turns of the winding are located. Metallic spacer elements are provided for connecting the supporting plates with a voltage tap being provided on at least one of the turns of the winding. At least one of the spacer elements is provided with a prolongation which projects beyond one of the supporting plates and is deformable to constitute a sleeve engaging about a turn of the winding.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: March 4, 1980
    Assignee: Firma Fritz Eichenauer
    Inventors: Klaus Meywald, Helmut Ohnmacht
  • Patent number: 4151398
    Abstract: A forced convection electrical heater assembly advantgeously utilizing expanded resistance alloy foil or grid in a pattern which produces a uniform temperature distribution in the existing airstream and which produces relatively little flow restriction on the airstream. The resistance grid in the form of at least one continuous strip is strung in a sinuous path to form a plurality of planar reaches spaced uniformly across the flow passage and extending longitudinally from inlet to outlet. Grid support elements at the inlet and outlet are arranged to force air to pass through the resistance grid only once to thereby achieve a minimum flow restriction. Alternation of the grain of the expanded foil in each plane and between planes and the provision of a flow deflector at the exit contribute to temperature uniformity.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: April 24, 1979
    Assignee: Gould Inc.
    Inventor: Douglas H. Maake
  • Patent number: 4146868
    Abstract: The unit comprises a fan-folded ribbon of resistance material supported by parallel insulating members at the ends of the loops. Each length or fold is formed with a transverse reverse bend or offset dividing the fold into major and minor lengths, which are not coplanar.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: March 27, 1979
    Assignee: Mosebach Manufacturing Company
    Inventors: Victor V. Kirilloff, William A. Benson
  • Patent number: 4122329
    Abstract: An electric air heating appliance includes a housing defining an air flow path in which is positioned a resistance heater assembly which includes a plurality of air vanes for reducing air swirling. The heater assembly includes a semi-rigid assembly of mica plates in a cruciform arrangement and stiffened by use of a corrugated resistance heating element helically wound about the plates. An improved terminal means provides a tap intermediate the ends of the helical heating element. Additional terminals means are provided for connecting the ends of the heating element to a power source. The terminal means, which are in the form of metallic strips defining extending leg segments, cooperate with an impeller fan tube surrounding an air impeller in the housing to support and captivate the heater assembly in the housing.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: October 24, 1978
    Assignee: Palmor International Corporation
    Inventor: Siegfried Godel
  • Patent number: 4109138
    Abstract: A fan-heater appliance, e.g., hair drier, has a tapping arrangement for providing a variable supply to a fan motor to regulate the speed thereof. The tapping arrangement comprises a current collector which is slidable over a row of heads of tubular rivets which are attached to the coil tips of a linearly coiled resistance heating wire arranged transversely of the air flow path through the appliance. The current collector is operated by a crank arrangement including a knurled disc operator.
    Type: Grant
    Filed: July 14, 1976
    Date of Patent: August 22, 1978
    Assignee: Firma Fritz Eichenauer
    Inventor: Helmut Ohnmacht
  • Patent number: 4090061
    Abstract: An air heating unit comprises a blower casing, a centrifugal impeller and a heating element in the shape of a cylindrical cage of longitudinal guide vanes fastened to the wall of the casing. The guide vanes are made from an electric resistance alloy in sheet form in the shape of uniform strips of a length conforming to the width of the impeller, all vanes being connected at their ends by conductive bridging pieces jointing the alternate ends of each two proximate vanes, thus forming a resister in zigzag pattern provided with terminals for energizing it. The vanes and the bridging pieces may form part of a single rectangular sheet rolled up to form the cylindrical casing and provided with alternate transverse cuts along both edges which stop short of the bridging pieces. The strips between the bridging pieces are bent or curved outwardly from the sheet at a desired angle.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: May 16, 1978
    Inventor: Dov Zeev Glucksman
  • Patent number: 4079233
    Abstract: A heating element for an electrical appliance having a blower (e.g. a fan heater or a hair drier) comprises a wire looped in linear formation (e.g. zig-zag or sinuous) the loops being held in position by support plates so that there are at least two loop rows transverse to the air flow direction and disposed in succession in that direction and so that the loops in one of those rows are placed opposite to gaps in the other. In an element having four loop rows with a center taping for two-stage power control the electrical connections are disposed on only one support plate with the center tapping connection at the same side of the plate as the means supply connections; also, the loops in a first pair of rows are aligned with one another and are offset from the loops in the second pair which are also aligned with one another.
    Type: Grant
    Filed: January 13, 1976
    Date of Patent: March 14, 1978
    Assignee: Firma Fritz Eichenauer
    Inventor: Klaus Meywald
  • Patent number: 4075459
    Abstract: A heater element for an electrical appliance (especially one having a blower, such as a fan heater, hair drier or the like) consists of a resistance heating wire looped in linear formation (e.g. zig-zag) and held transversely of the air flow direction by at least one support plate disposed parallel to said direction. The element has a voltage tapping point at the tip of one of the loops which projects beyond the other loops and has its tip fixed to an insulating panel parallel to said support plate. Said tip may be riveted or secured by an eye in a recess in said insulating plate.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: February 21, 1978
    Assignee: Firma Fritz Eichenauer
    Inventor: Ludwig Lieber
  • Patent number: 4066865
    Abstract: A heater assembly for an electrical appliance such as a portable hair dryer. The heater assembly includes an elongated flexible foil resistance element having opposite longitudinal edge portions mounted on spaced disc support members. T-shaped tabs extend from the foil edges and are seated in recessed portions or notches located in the periphery of the discs with the T-end portions thereof locked to the discs by detent means provided on the discs.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: January 3, 1978
    Assignee: Sperry Rand Corporation
    Inventors: Siegfried Godel, James Joseph Viola
  • Patent number: 4039774
    Abstract: A portable hair dryer comprising an elongated casing of circular transverse cross-section and including a handle portion at one end an air discharge nozzle portion at the opposite end and an enlarged diameter intermediate section housing operative elements comprising a heater element and a motor driven fan for generating heated output air which is drawn from input air circulated by the fan through the heater element and outwardly through a discharge orifice provided in the nozzle portion. The motor, fan and heater element are supported on a common support member which is mounted on a single support element which comprises a base portion of the intermediate casing section which extends from the handle portion. The handle portion is separated from the base portion of said intermediate section by air intake vents through which said input air is drawn and in which handle is housed the switch and circuit control elements of the appliance.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: August 2, 1977
    Assignee: Sperry Rand Corporation
    Inventors: Joseph Kata, Richard Ihasz
  • Patent number: 4025754
    Abstract: An electrically heated dryer for articles comprises a drying container and an air duct leading thereto for directing air in a stream through the duct and into the container. An electric resistance heating element is provided in the duct and comprises an expanded resistance metal sheet of separated strands and connecting bridges with the strands at an angle to the sheet and generally parallel to each other. The element is serpentively arranged in the duct in successive substantially planar reaches spanning the duct with the strand surfaces of the upstream reaches arranged substantially parallel to the direction of air flow for streamline wiping action thereof by the air stream. A planar reach downstream of said upstream reaches is arranged with its strand surfaces substantially non-parallel to the direction of air stream flow to aid in mixing the heated air prior to delivery into the container.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: May 24, 1977
    Assignee: Whirlpool Corporation
    Inventors: James M. Marzonie, Karl Jautakis
  • Patent number: 4001761
    Abstract: A power resistor including a resistance element of metal ribbon formed into an edgewound helix, and an internal three-point support structure axially disposed within the interior of the helix. The support structure includes three insulating assemblies each having a plurality of insulators secured by longitudinal compression springs to a support bar. The support structure also includes a pair of spreaders located at opposite ends of the helix, each having three radially extending arms. Assembly of the resistor includes the steps of inserting the insulating assemblies into the interior of the helix, radially spreading the insulating assemblies against the interior of the helix, and welding the ends of the support bars to the extending arms of the spreaders.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: January 4, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: Marvin E. Liebler, Eugene J. Lum