US3518407A - Heating device - Google Patents

Heating device Download PDF

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Publication number
US3518407A
US3518407A US716424A US3518407DA US3518407A US 3518407 A US3518407 A US 3518407A US 716424 A US716424 A US 716424A US 3518407D A US3518407D A US 3518407DA US 3518407 A US3518407 A US 3518407A
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US
United States
Prior art keywords
heat
plate
heating device
resistance
current
Prior art date
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Expired - Lifetime
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US716424A
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English (en)
Inventor
Ekkehard Andrich
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US Philips Corp
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3518407A publication Critical patent/US3518407A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/022—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
    • B23K3/02—Soldering irons; Bits
    • B23K3/03—Soldering irons; Bits electrically heated
    • B23K3/0338—Constructional features of electric soldering irons
    • B23K3/0353—Heating elements or heating element housings
    • 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
    • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
    • H05B3/30—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material on or between metallic plates

Definitions

  • the invention relates to a heating device adaptable for use within an electric soldering iron.
  • this heating device utilizes a heating element having a resistance which jumps to a high value when a certain temperature is exceeded.
  • PTC resistance elements or cold conductors are well known and commonly referred to as PTC resistance elements or cold conductors.
  • a material such as barium titanate, can be chosen so that when a temperature T is exceeded, the resistance value increases by a higher power of 10.
  • This invention is characterized in that an electric supply current fiows through a plate-shaped PTC resistance element in the direction of its thickness, and the resistance element is arranged with respect to a heat-emitting area so that during the emission of heat a temperature gradient occurs along the element (i.e. at right angles to the direction of the current). It should be noted that the development of heat is not the same in the various parts of the element, and this is used advantageously.
  • FIG. 1 shows the heating part of a soldering iron.
  • FIG. 2 shows a modification of FIG. 1.
  • the device shown in FIG. 1 includes a resistance element 1 made of a material having a resistance which jumps to a high value when a temperature T is exceeded.
  • a barium-lead titanate is used, the jumping temperature T of which lies at approximately 340 C.
  • the element 1 has the form of a thin plate having a thickness of, for example, 1 mm., the largest surface of which is covered with a metal foil 2. and 3, respectively. (In the drawing, these metal foils are spaced by a certain distance from the plate 1 for the sake of clarity, but in actual fact, they are located very close to the plate 1.)
  • the soldering tip is denoted by 7 and also consists of a thermally good conducting material, for example, copper; it may be integral with the wall 6.
  • the elements 1, 2, 3, 4, 5, 6 are spaced apart in the drawing for the sake of clarity, but in actual fact they are located very close to each other.
  • the electric current is applied to the metal foils 2 and 3, respectively, and flows through the plate 1 and hence in the, direction of the arrow i at right angles to the greatest surface area of the plate 1.
  • the element is heated and the heat is conducted to the wall 6 and the soldering tip 7.
  • an operating temperature of the plate of, for example, 350 C. to 360 C. is adjusted, which exceeds the temperature T This themperature prevails, throughout the plate and the current in the plate is comparatively small.
  • the power is supplied mainly through the soldering tip 7.
  • a temperature gradient occurs along the wall 6 and the plate 1; the coldest area is located close to the soldering tip 7 so that the current and the power produced in the plate 1 are a maximum at this area.
  • the heat is emitted mainly in the direction of the point of the arrow W, i.e. at right angles to the direction of the current i.
  • the temperature of the resistance element 1 increases in a direction away from the soldering tip 7 (i.e. in the direction of the righthand end of the resistance element 1). Thus, only a small current flows at this end of the resistance element 1 and the power produced does not increase much. If during operation of the soldering iron, a larger quantity of heat W is derived,
  • the zone of low temperature is enlarged further (to the right) over the plate and the development of heat automatically matches the need of heat.
  • the soldering tip 7 is joined not only to the wall 6 but also to a central plate .8, the wall and the plate both consisting of a thermally good conducting material. Between the central plate 8 and the wall 6 are sandwiched several plate-shaped resistance elements 1 (which are again provided on either side with metal current-supply foils and are insulated from the wall 6 and from the central plate 8 by insulating foils. Also in this case, the zone of low temperature is enlarged with an increased emission of heat (direction W) over a larger distance from the soldering tip 7 (i.e. at right angles to the direction 1' of the current through the resistance elements 1).
  • a heating device for use within a soldering iron and comprising a plate-shaped positive temperature coefficient resistance element, means for creating a current flow transversely across and through the resistance element, heat insulating means for permitting heat flow in a direction perpendicular to the current How, and heat emitting tip means thermally coactive with the resistance element for producing a longitudinal temperature gradient lengthwise along the resistance element during-heat emission.
  • a heating device as claimed in claim 1 wherein the means for creating a current flow includes sheets of metal foil placed parallel to and on either side of the resistance element.
  • a heating device as claimed in claim 4 wherein sheets of insulating mica foil are placed parallel to and on either side of the conductive metal foil.
  • a heating device as claimed in claim 3 comprising a 1,609,920 12/ 1926 Whited 219-236 X centralplate of a thermal conducting material extending 3,400,250 9/1968 Buiting et al.' 219-505 X from the tip means, and a plurality of resistance elements 3,414,705 12/ 1968 Marcoux 219210 positioned on either side of the central plate. 3,414,706 12/1968 Flanagan et a1 219210 References Cited 5 ANTHONY BARTIS, Primary Examiner UNITED STATES PATENTS s L R6.236,619 2/1953 Weller 219 235 219 241 ,05. 22 51 1,363,473 12/1920 Kuhn et a1 219-238 X

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Heating (AREA)
  • Details Of Resistors (AREA)
US716424A 1967-04-04 1968-03-27 Heating device Expired - Lifetime US3518407A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN0030274 1967-04-04

Publications (1)

Publication Number Publication Date
US3518407A true US3518407A (en) 1970-06-30

Family

ID=7345463

Family Applications (1)

Application Number Title Priority Date Filing Date
US716424A Expired - Lifetime US3518407A (en) 1967-04-04 1968-03-27 Heating device

Country Status (5)

Country Link
US (1) US3518407A (enrdf_load_stackoverflow)
BE (1) BE713104A (enrdf_load_stackoverflow)
ES (1) ES352300A1 (enrdf_load_stackoverflow)
FR (1) FR1559383A (enrdf_load_stackoverflow)
GB (1) GB1193585A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584190A (en) * 1970-02-27 1971-06-08 Texas Instruments Inc Self-regulating heat applicator
US3632971A (en) * 1970-01-27 1972-01-04 Texas Instruments Inc Self-limiting electric hair curler heater
US3760495A (en) * 1970-01-27 1973-09-25 Texas Instruments Inc Process for making conductive polymers
US4463247A (en) * 1982-12-06 1984-07-31 Eldon Industries, Inc. Soldering iron having electric heater unit with improved heat transfer characteristics
US4468555A (en) * 1980-08-31 1984-08-28 Tdk Corporation Electric soldering iron having a PTC heating element
EP0102315A3 (en) * 1982-07-28 1985-01-16 Ersa Ernst Sachs Kg Gmbh & Co. Circuit arrangement for regulating the working temperature of the heating element of an electric soldering instrument, especially a solder iron
US4544829A (en) * 1980-08-31 1985-10-01 Tdk Corporation Electric soldering iron having a PTC heating element
US5345059A (en) * 1993-08-02 1994-09-06 Wen Shih Hsien Temperature self-regulating, electrically-heated spoon
US5376772A (en) * 1990-08-31 1994-12-27 The Pilot Ink Co., Ltd. Electrothermal instrument with heat generating element of sintered BaTiO3 in contact with heat transmitting member
US20090140028A1 (en) * 2007-11-30 2009-06-04 Nordson Corporation Soldering tip, soldering iron, and soldering system
WO2010108284A1 (en) * 2009-03-27 2010-09-30 Ats Automation Tooling Systems Inc. Thermode, clamping arrangement therefor, and method of manufacture
CN103143807A (zh) * 2013-03-15 2013-06-12 河南科技大学 一种可调温电烙铁及其调温方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1363473A (en) * 1920-05-27 1920-12-28 American Electrical Heater Co Electrically-heated tool
US1609920A (en) * 1925-07-06 1926-12-07 Harry W Whited Portable electric lumber and timber grade-marking device
US3400250A (en) * 1966-01-03 1968-09-03 Texas Instruments Inc Heating apparatus
US3414705A (en) * 1965-10-24 1968-12-03 Texas Instruments Inc Component oven
US3414706A (en) * 1966-01-03 1968-12-03 Texas Instruments Inc Self-regulating heating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1363473A (en) * 1920-05-27 1920-12-28 American Electrical Heater Co Electrically-heated tool
US1609920A (en) * 1925-07-06 1926-12-07 Harry W Whited Portable electric lumber and timber grade-marking device
US3414705A (en) * 1965-10-24 1968-12-03 Texas Instruments Inc Component oven
US3400250A (en) * 1966-01-03 1968-09-03 Texas Instruments Inc Heating apparatus
US3414706A (en) * 1966-01-03 1968-12-03 Texas Instruments Inc Self-regulating heating device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3632971A (en) * 1970-01-27 1972-01-04 Texas Instruments Inc Self-limiting electric hair curler heater
US3760495A (en) * 1970-01-27 1973-09-25 Texas Instruments Inc Process for making conductive polymers
US3584190A (en) * 1970-02-27 1971-06-08 Texas Instruments Inc Self-regulating heat applicator
US4544829A (en) * 1980-08-31 1985-10-01 Tdk Corporation Electric soldering iron having a PTC heating element
US4468555A (en) * 1980-08-31 1984-08-28 Tdk Corporation Electric soldering iron having a PTC heating element
EP0102315A3 (en) * 1982-07-28 1985-01-16 Ersa Ernst Sachs Kg Gmbh & Co. Circuit arrangement for regulating the working temperature of the heating element of an electric soldering instrument, especially a solder iron
US4463247A (en) * 1982-12-06 1984-07-31 Eldon Industries, Inc. Soldering iron having electric heater unit with improved heat transfer characteristics
US5376772A (en) * 1990-08-31 1994-12-27 The Pilot Ink Co., Ltd. Electrothermal instrument with heat generating element of sintered BaTiO3 in contact with heat transmitting member
US5345059A (en) * 1993-08-02 1994-09-06 Wen Shih Hsien Temperature self-regulating, electrically-heated spoon
US20090140028A1 (en) * 2007-11-30 2009-06-04 Nordson Corporation Soldering tip, soldering iron, and soldering system
US7699208B2 (en) * 2007-11-30 2010-04-20 Nordson Corporation Soldering tip, soldering iron, and soldering system
WO2010108284A1 (en) * 2009-03-27 2010-09-30 Ats Automation Tooling Systems Inc. Thermode, clamping arrangement therefor, and method of manufacture
US20100243712A1 (en) * 2009-03-27 2010-09-30 Ats Automation Tooling Systems Inc. Thermode, clamping arrangment therefor, and method of manufacture
CN103143807A (zh) * 2013-03-15 2013-06-12 河南科技大学 一种可调温电烙铁及其调温方法

Also Published As

Publication number Publication date
DE1690621A1 (de) 1971-06-03
BE713104A (enrdf_load_stackoverflow) 1968-10-02
GB1193585A (en) 1970-06-03
ES352300A1 (es) 1969-07-01
FR1559383A (enrdf_load_stackoverflow) 1969-03-07
DE1690621B2 (de) 1975-06-05

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