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.

Patents

  1. Advanced Patent Search
Publication numberUS3721799 A
Publication typeGrant
Publication dateMar 20, 1973
Filing dateOct 20, 1970
Priority dateOct 22, 1969
Also published asCA949635A, CA949635A1
Publication numberUS 3721799 A, US 3721799A, US-A-3721799, US3721799 A, US3721799A
InventorsR Carlstrom
Original AssigneeR Carlstrom
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric heating source for seats and mattresses and methods of application of the same
US 3721799 A
Abstract
The electric heating source of the invention is a fabric provided with parallelly interwoven groups of resistance wires transversed by parallelly interwoven groups of conducting wires, both kinds of wires thereby forming electrical contacts with each other. The resistance wires are interrupted, in the fabric, to form current circuits in which the transversely interwoven wires are connected to conductive feeder wires which are connected to a suitable current supply.
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent [191 Carlstrom 5]March 2%, 1973 [54] ELECTRHC HEATING SQURCE FOR SEATS AND MATTRESSES AND METHODS OF APPLHCATIUN GK THE SAME [76] Inventor: Ruben Carlstrom, Alstromersgaten 9, 44100 Alingsas, Sweden [22] Filed: Oct. 20, 1970 [21] Appl. No.: 82,345

. Foreign Application Priority Data Oct. 22. 1969 Sweden ..14440/69 [52] US. Cl ..219/212, 219/545 [.51] lint. C1. "111151) 1/110 [58] Field of Search ..219/21l2l3, 217, 219/528-529, 543, 545, 548, 549; 338/208; 139/425; 5/334 [56] Reiierences (Iited UNITED STATES PATENTS 3,513,297 5/1970 Jordan ..2l9/545 1/1960 Crump ..2l9/545 X 2,938,992

5/ 1960 Crump .t

Primary Examiner C. L. Albritton Att0rneyPierce, Scheffier & Parker 5 7 ABSTRACT The electric heating source of the invention is a fabric provided with parallelly interwoven groups of resistance wires transversed by parallelly interwoven groups of conducting wires, both kinds of wires thereby forming electrical contacts with each other. The resistance wires are interrupted, in the fabric, to form current circuits in which the transversely inter woven wires are connected to conductive feeder wires which are connected to a suitable current supply.

4 Claims, 11 Drawing Figure ELECTRIC HEATING SOURCE FOR SEATS AND MATTRESSES AND METHODS OF APILICATION OF THE SAME This invention refers to different methods for using electric resistance heating devices for car seats, tractor seats and many possibilities of application such as cushions, blankets mattresses and fabrics. According to the invention the heating device consists of one or several heating circuits or heating elements, which are so constructed that their substantially parallelly running resistance wires are transversed by current carrying resistance wires, which are disposed in an insulating material and together form independent small sections. The advantage with said construction is that a break, if any, of a resistance wire only causes very small power losses. If there is a break of a resistance wire, the current is led past the place of rupture via the resistance wires which are located closest to and transversing the same. The current circuits can be connected together via a power switch so that a variable heat generation can be obtained.

Electric heating devices for cushions, blankets etc. are known, but said devices have continuous resistance wires with only prescribed methods to insulate the same. According to my invention the arrangement of the heating with independent sections of the special heat circuits is more reliable in use and more diversified when applied, without any increase in the price of the device worth mentioning, for the resistance wires can be fastened on or be woven into a suitable insulation material, possibly a glass-fiber material or some other fire-proof material. The resistance wires transverse each other for forming direct contact and for forming the sections described, and can also have extra accompanying fiber wires which strengthen and fasten the resistance wires in question, which must not be insulated, but rather finished against oxidation. At a wire break, if any, the power loss is small thanks to the construction which has been described above.

My invention shows another effect in the combination of the heating source and its associated cover. The latter is provided with an especially impregnated fabric surface layer with the ability to breathe moisture and liquids, which is an advantage for the way of application and the effectiveness of the invention, i.e. for tractor seats and tractor fittings, which must withstand moisture. According to my Swedish Pat. No. 180.206 which applies to silicone treatment of plastic surfaces and fabrics, said idea can be combined with the heating source in such a way that the coating surface layer is impregnated with silicone or corresponding material with the purpose that no liquid or moisture can penetrate into the surface layer, which, moreover, shall have the ability of letting the heat pass. The same thing applies to mattresses, blankets and stretchers with a heating source, the surface layer of laminated fabric can possibly be sprayed with a liquid containing silicone and other desired substances being absorbed by the skin and the musculature under co-operation of the effect of the heat source according to the invention.

In the enclosed drawing, the FlGURE shows as an example a wiring diagram for four current circuits A, B,

C and D, each one consisting of small independent sections S. The insulation material is designated by l and the place of the power switch by E.

According to the FIGURE of drawing parallel resistance wires in this case are designated by l and the transversing, perpendicular resistance wires by 2 with accompanying fiber wires 3. Said resistance wires together form small desired independent sections S. The accompanying fiber wire 3 serves as a reinforcement and/or for a special wire fastening, for instance in zigzag formation in order to contact-fasten the transversing. resistance wires with each other. An arisen break of the resistance wire is indicated in the section S and in such a case the current is led past the section according to the arrow directions set forth. In order to secure the contact between the sections, the resistance wires can be interwoven and thus transversing each other.

In the claims the specific features of the invention are set forth.

Within the scope of the invention, different solutions can be thought concerning the purpose and the way of application with the utilization of the heating source as an independent unit or as a combination part in different connections for connection to a battery or the mains voltage.

What I claim is:

1. In an electric source for seats, fabrics, blankets, mattresses, stretchers and the like involving the use of resistance heating means and the arrangement of these in a fabric of insulating warp and weft strands, the improved construction wherein the heating source consists essentially of at least one heating circuit being formed by an arrangement of substantially parallelly running resistance wires traversed by substantially parallel conducting wires of relatively low resistance, said arrangement of wires forming substantially squareshaped sections of predetermined size, said at least one heating circuit being combined with a suitable insulating carrier material, said parallel resistance wires being interwoven in parallel groups in said fabric, said resistance wires running through current circuits in the fabric between which they are interrupted and in which several heating sections are formed, said resistance wires in the current circuits being transversely interwoven with groups of conducting wires which are connected to conductive feeder wires located adjacent the ends of the conducting wires.

2. Electric heat source according to claim I, wherein the resistance wires forming sections are operatively associated with fiber wires, arranged in interwoven formations, that fasten the resistance wires at their traversing points.

3. Electric heat source according to claim 1, wherein the resistance wires and the conducting wires consist essentially of multiple strands each strand having a small diameter.

4. Electric heat source according to claim ll, wherein the conductive feeder wires are connected to a power switch through which electrical current is supplied to the electric heating source.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2922867 *May 8, 1958Jan 26, 1960Electrofilm IncConductive surface coverage electrical heating elements
US2938992 *Apr 18, 1958May 31, 1960Electrofilm IncHeaters using conductive woven tapes
US3513297 *May 31, 1967May 19, 1970Gulton Ind IncHeat radiating articles
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3946194 *Nov 18, 1974Mar 23, 1976Bretonieri Andre B DeBuilding comprising one or more rooms or confined spaces equipped with an electric heating installation, and/or an electric heating installation for this building, equipped with a heating device
US4423308 *Jun 22, 1981Dec 27, 1983Simmons U.S.A. CorporationThermally controllable heating mattress
US4538054 *Dec 27, 1983Aug 27, 1985Bretoniere Andre B DeElectric heating fabric
US4814585 *Jun 11, 1986Mar 21, 1989Dan KleinTextile or fabric and method of production
US5422462 *Apr 1, 1994Jun 6, 1995Matsushita Electric Industrial Co., Ltd.Electric heating sheet
US5475203 *May 18, 1994Dec 12, 1995Gas Research InstituteMethod and woven mesh heater comprising insulated and noninsulated wire for fusion welding of plastic pieces
US5679277 *Mar 2, 1995Oct 21, 1997Niibe; AkitoshiFlame-resistant heating body and method for making same
US6031214 *Feb 6, 1997Feb 29, 2000EurocopterDevice for heating an aerofoil
US6160246 *Sep 13, 1999Dec 12, 2000Malden Mills Industries, Inc.Method of forming electric heat/warming fabric articles
US6215111 *Dec 21, 1999Apr 10, 2001Malden Mills Industries, Inc.Electric heating/warming fabric articles
US6307189Oct 31, 2000Oct 23, 2001Malden Mills Industries, Inc.Electric heating/warming fabric articles
US6373034Oct 26, 2000Apr 16, 2002Malden Mills Industries, Inc.Electric heating/warming fabric articles
US6414286Feb 23, 2001Jul 2, 2002Malden Mills Industries, Inc.Electric heating/warming fibrous articles
US6501055Mar 22, 2001Dec 31, 2002Malden Mills Industries, Inc.Electric heating/warming fabric articles
US6548789Jun 12, 2000Apr 15, 2003Malden Mills Industries, Inc.Electric resistance heating/warming fabric articles
US6649886 *May 11, 2002Nov 18, 2003David KleshchikElectric heating cloth and method
US6794610Sep 10, 2002Sep 21, 2004Sunbeam Products, Inc.Heating blankets with low-current multiple heating elements
US6852956Feb 25, 2002Feb 8, 2005Malden Mills Industries, Inc.Fabric with heated circuit printed on intermediate film
US6888112Feb 25, 2002May 3, 2005Malden Hills Industries, Inc.Electric heating/warming woven fibrous articles
US6963055Mar 17, 2003Nov 8, 2005Malden Mills Industries, Inc.Electric resistance heating/warming fabric articles
US7034254May 11, 2004Apr 25, 2006The Scott Fetzer CompanyHeated delivery system
US7038177Sep 2, 2004May 2, 2006Malden Mills Industries, Inc.Electric heating/warming fabric articles
US7053344 *Jan 24, 2000May 30, 2006Illinois Tool Works IncSelf regulating flexible heater
US7741582Oct 24, 2007Jun 22, 2010W.E.T. Automotive Systems AgHeater for automotive vehicle and method of forming same
US8288693 *Mar 4, 2005Oct 16, 2012W.E.T. Automotive Systems AgFlat heating element
US8375485 *Feb 19, 2013Anodyne Therapy, L.L.C.System, method and apparatus for treating back pain during rest
US8507831May 12, 2010Aug 13, 2013W.E.T. Automotive Systems AgHeater for an automotive vehicle and method of forming same
US8544942May 12, 2011Oct 1, 2013W.E.T. Automotive Systems, Ltd.Heater for an automotive vehicle and method of forming same
US8702164May 12, 2011Apr 22, 2014W.E.T. Automotive Systems, Ltd.Heater for an automotive vehicle and method of forming same
US8766142Jul 12, 2013Jul 1, 2014W.E.T. Automotive Systems AgHeater for an automotive vehicle and method of forming same
US9191997Oct 6, 2011Nov 17, 2015Gentherm GmbhElectrical conductor
US9298207Jul 30, 2012Mar 29, 2016Gentherm GmbhTemperature control device
US9315133Jun 20, 2014Apr 19, 2016Gentherm GmbhHeater for an automotive vehicle and method of forming same
US20020117494 *Feb 25, 2002Aug 29, 2002Moshe RockFabric with heated circuit printed on intermediate film
US20050061802 *Sep 2, 2004Mar 24, 2005Moshe RockElectric heating/warming fabric articles
US20050252904 *May 11, 2004Nov 17, 2005Grabowski Brian MHeated delivery system
US20070278214 *Mar 4, 2005Dec 6, 2007Michael WeissFlat Heating Element
US20080179306 *Oct 24, 2007Jul 31, 2008W.E.T. Automotives Systems AgHeater for automotive vehicle and method of forming same
US20110226751 *Sep 22, 2011W.E.T. Automotive Systems, Ltd.Heater for an automotive vehicle and method of forming same
US20120030872 *Aug 4, 2010Feb 9, 2012Anodyne Therapy, L.L.C.System, method and apparatus for treating back pain during rest
US20120030873 *Feb 9, 2012Anodyne Therapy, L.L.C.Integrated system, method and apparatus for treating back pain during rest
WO1998001009A1 *Jun 27, 1997Jan 8, 1998Zvi HorovitzElectrically-heated, flexible and stretchable, shaped fabric
Classifications
U.S. Classification219/212, 219/545
International ClassificationH05B3/34
Cooperative ClassificationH05B2203/005, H05B2203/029, H05B3/342, H05B2203/033, H05B2203/017, H05B2203/015
European ClassificationH05B3/34B