Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2165970 A
Publication typeGrant
Publication dateJul 11, 1939
Filing dateJun 28, 1935
Priority dateApr 27, 1932
Publication numberUS 2165970 A, US 2165970A, US-A-2165970, US2165970 A, US2165970A
InventorsBernhard Jaspers
Original AssigneeBernhard Jaspers
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric heating system operating by heat radiation
US 2165970 A
Previous page
Next page
Description  (OCR text may contain errors)

B. JASPERS July 11, 1939.

ELECTRIC HEATING SYSTEM OPERATING BY HEAT RADIATION Filed June 28, 1935 b Snvencor Bernhard flaspers Patented July 11, 1939 UNITED STATES ELECTRIC HEATING SYSTEM OPERATING BY HEAT RADIATION Bernhard Jasper-s, Mannheim-Kafertal, Germany Application June 28, 1935, Serial No. 28,914 In Germany April 27, 1932 3 Claims.

This invention relates to an improved electric heating system suitable for dwellings, factories, hospitals and the like and in which the heat is transmitted by radiation through still air rather than by convection of circulation of air. Heating by convection is uneconomical and is associated with an objectionable raising of dust. The air in the room or space is further inclined to be dry and at windows and other points of the room objectionable draughts occur. According to this invention a very efiective electric heating system is obtained which operates by heat radiation and is free of danger so that no fire or unhealthy effeet can result from any short circuit in the heating elements or in the wiring thereof.

For the purpose of illustrating my invention I have shown certain embodiments in the 'accompanying drawing in which:

Figure 1 illustrates a floor heating unit employing a wire netting to which current from a transformer is supplied.

Figure 2 shows a ceiling heating element supplied Irom a converter.

Figure 3 shows a floor heater embodied in a carpet.

Figure 4 a room heater in the form of a metal globe, which also functions as a lighting element, and 3 Figure 5 is a perspective view of a room in which the various forms of heaters are shown in combination.

It is an important feature of this invention that there is a strict separation electrically of 35 the heater elements from the supply circuit or source of electric current and moreover the conductors forming the heating elements have a low ohmic resistance and are supplied with a current of such low voltage that these conductors,

40 forming the heating elements, are kept at a temperature only very slightly in excess of the desired room temperature. Hot stufllness which is a characteristic of the usual convection heating systems, is completely avoided.

45 In the form of the invention according to Figure 1 the floor b of a room C (see Figure 5) is covered with an extensive heating sheet comprising a fine metal mesh w. This metal mesh w is connected on its two parallel sides with flat 50 copper bars s which are in turn connected to the two terminals of the secondary of a transformer t.

The metal mesh or conductor may clearly be insulated or un-insulated from the floor. In accordance with Figure 2 a wood plate or board d is .5 attached to the ceiling and on its face, forming a panel, directed towards the interior of the room the panel is sprayed with a metal spray forming a metallic conducting surface w (Figures 2 and 5). The strips 1 indicate interruptions in the metal coating w, so that the current flows 5 from a generator g driven by a motor m by way of the terminals k, W, as indicated by the arrow 1/. The resistance of the path of the current may be altered by altering the number of the interruptions so as to increase or decrease the 10 length of the said path.

In Figure 3 the floor b is covered by a carpet in which bars or wires 71. are interwoven. The ends of the wires are connected by fiat bars s to a condenser g. 5

In Figure 4, a hollow metal globe is provided as the heat radiation. A rectifier q is arranged within the globe and the secondary of this rectifier is connected at two opposite points of the globe, as at n and 11 For the purpose of using the globe as the illuminating lamp for the room, neon tubes 11. or the like may be mounted on the globe. The current source of these tubes is not shown in the drawing as it may be arranged in any well known manner.

The general arrangement of the room shown in Figure 5 shows several separate heating meshes w, w, w w" with a conducting rail or bar indicated by a thick line so that the current from one terminal of a transformer 25 fiows through the individual meshes 10 w M, 1.0 to the other terminal. The ceiling heater w is also-connected to this transformer t. In some cases the invention may be applied in the form of screenssuch as screen 0 which is constructed with panels and connected to the current source in accordance with this invention.

What I claim is:

1. An electric room-heating system, comprising heating sheets disposed on an inner bounding surface of the room to be heated and presenting a comparatively large heating surface. said sheets having a flat metal body consisting of a material of low ohmic resistance and being transversely extensive with respect to the direction of the current flow so as to constitute a multitude of juxtaposed and parallel current paths, and means for connecting each of said heating sheets with an energizing circuit, said means having a lowvoltage output circuit insulated from said energizing circuit and connected with said metal body, said connecting means and said body being designed to maintain said sheet at a temperature slightly above the desired room temperature. 66

2. In an electric room heating system according to claim 1, said heating sheets being placed on the floor of the room to be heated and covering a substantial portion of said floor. and said metal body consisting of a wire mesh and having terminal bars extending along two opposite edges of said wire mesh and having a larger cross section than the wires of said mesh.

3. In an electric room heating system according to claim 1, said heating sheets comprising a flat panel and said metal body consisting 01' a thin metal coating deposited on said panel and having interruptions so as to lengthen the current paths formed by said coating.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2458184 *Jan 15, 1944Jan 4, 1949Us Rubber CoElectrically conducting panel
US2469466 *Jan 15, 1948May 10, 1949Electric Heat Devices IncHeater
US2493125 *Feb 5, 1945Jan 3, 1950Calpat CorpDoor-mounted electric space heater
US2495414 *Oct 6, 1948Jan 24, 1950Electric Heat Devices IncAir filter for electrically heated drapes
US2503457 *Apr 4, 1947Apr 11, 1950Curtiss Wright CorpPropeller blade deicing shoe
US2503600 *Jul 29, 1946Apr 11, 1950Tice Reuben SBuilding heating system
US2504146 *Feb 6, 1940Apr 18, 1950Barth Mossin GeorgElectrical heating device
US2504697 *Sep 13, 1946Apr 18, 1950Gen ElectricX-ray table for patients
US2511378 *Sep 5, 1946Jun 13, 1950Roberson Leonard NRadiant electric heating device
US2513993 *Jul 13, 1946Jul 4, 1950Budd CoPanel heating
US2522542 *Jul 2, 1948Sep 19, 1950Schaefer JosephHeavy current resistor
US2523353 *Oct 3, 1946Sep 26, 1950Boester Carl FHeating screen
US2533409 *Jan 28, 1947Dec 12, 1950Tice Reuben SElectrical heating system
US2564325 *Apr 4, 1946Aug 14, 1951Goodrich Co B FHeated propeller covering
US2564706 *May 2, 1946Aug 21, 1951Corning Glass WorksCoated resistance
US2573455 *Dec 16, 1947Oct 30, 1951Lamont B KoontzElectrically heated bed and control device
US2574085 *Nov 1, 1947Nov 6, 1951Burton H WilliamsExtraction drier
US2579127 *Dec 30, 1946Dec 18, 1951Samuel Prendergast RichardHeater
US2600486 *Feb 7, 1951Jun 17, 1952Cox Duncan BElectric heater
US2615115 *Sep 30, 1949Oct 21, 1952Budd CoSpace-heating means
US2627012 *Aug 5, 1950Jan 27, 1953English Electric Co LtdHeating of surfaces by laminated foil resistance elements with timed connecting means
US2641675 *Jan 17, 1950Jun 9, 1953Sylvania Electric ProdPrinted electrical conductor
US2680800 *Jul 17, 1947Jun 8, 1954Chandler Edward FRadiant heating element
US2719213 *Jul 21, 1949Sep 27, 1955Johnson Oliver FHeat shield
US2731912 *Mar 23, 1950Jan 24, 1956 Welsh
US2889991 *Aug 14, 1956Jun 9, 1959Rogers FollansbeeHeating system
US3020378 *Nov 10, 1958Feb 6, 1962Paul EislerElectrical heating and conducting devices
US3223825 *Mar 21, 1958Dec 14, 1965Williams Chester IElectric grid floor heating system
US5758016 *Jan 18, 1993May 26, 1998Nilborn; JanMethod of obtaining saving of energy and apparatus for utilization in said method
US6049063 *Oct 24, 1995Apr 11, 2000Barber; Nicholas Everard AshbyLow voltage wire mesh heating element
US6686562 *Aug 18, 2000Feb 3, 2004W.E.T. Automotive Systems AgHeating element
WO1994016370A1 *Jan 18, 1993Jul 21, 1994Jan NilbornMethod of obtaining saving of energy and apparatus for utilization in said method
U.S. Classification392/436, 219/543, 338/308, 219/213, 338/293, 219/220, 338/208, 237/69
International ClassificationF24D13/02
Cooperative ClassificationF24D13/024
European ClassificationF24D13/02B2