US2485843A - High-frequency heating arrangement - Google Patents

High-frequency heating arrangement Download PDF

Info

Publication number
US2485843A
US2485843A US792218A US79221847A US2485843A US 2485843 A US2485843 A US 2485843A US 792218 A US792218 A US 792218A US 79221847 A US79221847 A US 79221847A US 2485843 A US2485843 A US 2485843A
Authority
US
United States
Prior art keywords
ring
frequency heating
coil
high frequency
concentrator
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
US792218A
Other languages
English (en)
Inventor
Pinkney Arthur Jack
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2485843A publication Critical patent/US2485843A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/365—Coil arrangements using supplementary conductive or ferromagnetic pieces
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/362—Coil arrangements with flat coil conductors

Definitions

  • This invention relates to high frequency heat ing arrangements incorporating a concentrator of the kind consisting of a hollow cylinder of copper or similar highly conducting material provided at one end with a block of like material which is attached to the cylinder and has an aperture for the passage of the work; the block and the cylinder are slotted so that a closed circuit does not exist about the aperture.
  • the high frequency current is supplied to a coil surrounding the cylinder.
  • the end block is provided with an aperture greater than or at least not smaller than the maximum desired aperture, the walls of the aperture being so shaped as to form a seating for an adaptor ring which is inserted in. the aperture in the end block and is itself provided with an aperture appropriate to the work.
  • the adaptor ring is slotted in the same way as the end block and cylinder and consists of similar material. To avoid the production of a closed circuit about the aperture, the slots in the adaptor ring and the remainder of the concentrator may be aligned, but preferably the adaptor is insulated from the remainder by the interposing of a layer of mica for example.
  • Figure 1 is a central vertical section through a high frequency heating arrangement according to the invention, the section being taken substantially along the line I--I of Figure 2.
  • Figure 2 is a top plan view of Figure 1.
  • Figures 3 to 6 show central sections through alternative forms of concentrator rings for use in the arrangement according to Figures 1 and 2, Figures 3 to 6 being on a somewhat larger scale than Figures 1 and 2.
  • Figure 7 illustrates a further embodiment according to the invention.
  • the main inductor I consists of a number of turns of square section copper tubing, the consecutive turns being supported at the desired spacing by a number of insulating spacing members 2.
  • the two ends 3 of the main inductor coil l are provided with connections for water or other cooling fluid and are also electrically connected to the high frequency source (not shown).
  • a concentrator unit consisting of a cylindrical body 4 and an annular top member 5 constituting the end block, the inner diameter of the annular member being smaller than the inner diameter of the cylindrical body l.
  • the concentrator is provided with a radial slot 5 extending through the annular top member 5 and along the length of the cylindrical body 4.
  • the cylindrical body 4 is hollow and is provided with water inlet and outlet connections I and 8 respectively.
  • the arrangement so far described is supported on an insulating base plate 9 provided with legs Ill, the concentrator body being secured to the base plate 9 by a number of bolts l4 ( Figure 1).
  • the upper face of the annular concentrator member 5 is covered by a cover plate I I of insulating material which also covers the top of the main inductor coil l.
  • the cover plate H is secured by means of bolts l2 which are embedded in the concentrator member 5 and which receive nuts engaging the outer surface of the cover plate H.
  • the peripheral surface of the main inductor coil is enclosed within a cylindrical surround l3 of insulating material which extends between the base plate 9 and the cover plate II.
  • the annular top member 5 of the concentrator has a central aperture considerably in excess of the diameter of the work which it is desired to heat.
  • an adaptor ring i5 is inserted in the central aperture in the annulus 5 and is provided with a central aperture 16 corresponding to the size of the work to be heated.
  • This inserted concentrator ring [5 is provided with a radial slot ii. If the inserted ring I5 is insulated from the annulus 5 by an interposed layer of mica or equivalent insulating material capable of withstanding an elevated temperature the slot I! need not be aligned with the slot 6 in the annulus 5, but if there is metallic contact between the inserted ring l5 and the annulus 5 the slots l1 and 6 must be in registration.
  • a layer 21 of mica is interposed between the inserted concentrator ring I and the annulus 5.
  • the inserted ring [5 is supported in the desired position by means of an annular member [8 of insulating material which is secured to the underface of the annulus 5 by means of bolts l9 engaging in tapped holes 20 passing through the annulus 5.
  • the concentrator ring I5 is thus removably supported in the annulus 5 and. can consequently be replaced by a ring exhibiting an aperture of different size or shape to suit the particular work which is to be treated.
  • Typical alternatives to the form of inserted ring shown in Figure 1 are illustrated in Figures 3 to 6.
  • Figures 3 to 6 show a cross-section through the ring I5 with the work aperture IE, but the crosssection has been taken on such a line that the radial slot l1 ( Figures 1 and 2) does not appear.
  • the supporting ring l8 could be dispensed with, the ring [5 being made of conical form tapering downwardly and the inner surface of the annulus 5 forming a corresponding conical seat.
  • the ring [5 being made of conical form tapering downwardly and the inner surface of the annulus 5 forming a corresponding conical seat.
  • Fig. 7 Such a construction is shown in Fig. 7. In this case the slot in the inserted ring must register with the slot 6 in the annulus 5.
  • the insulating supporting l8 ( Figure 1) may comprise or carry a jig for the accurate location of the work in the aperture 15 in the ring 15.
  • High frequency heating apparatus comprising a coil member for generating a high frequency heating field, a first electrically conductive tubular member fixedly secured within an end portion of said coil and provided with a slot longitudinally extending through a Wall portion thereof, and a second electrically conductive tubular member positioned within said first tubular member and provided with a slot extending through a wall portion thereof.
  • High frequency heating apparatus comprising a helical coil member for generating high frequency heating field, a first electrically conductive cylindrical member fixedly secured Within said coil, a second electrically conductive tubular member fixedly secured within an end portion of said coil in abutting relationship to one end of said first member, said first and second member being provided with aligned slots extending through a Wall portion thereof, and a third electrically conductive tubular member positioned Within said second tubular member and provided with a slot extending through a Wall portion thereof.
  • High frequency heating apparatus comprising a helical coil member for generating a high frequency heating field, a first electrically conductive cylindrical member fixedly secured within said coil, a second electrically conductive annular member fixedly secured within an end portion of said coil in abutting relationship to one end of said first member, said first and second members being provided with aligned radial slots, and a third electrically conductive ring member positioned within said annular member and provided with a radial slot.
  • High frequency heating apparatus comprising a helical coil member for generating a high frequency heating field, a first electrically conductive cylindrical member fixedly secured within said coil, a second electrically conductive annular member fixedly secured within an end portion of said coil in abutting relationship to one end of said cylindrical member, said first and second members being electrically interconnected, being provided with aligned radial slots and being electrically insulated from said helical coil, a third electrically conductive ring member positioned within said annular member and provided with a radial slot, and means to electrically insulate said ring member from said annular member.
  • High frequency heating apparatus comprising a helical coil member for generating a high frequency heating field, a first electrically conductive cylindrical member fixedly secured Within said coil and comprising spaced concentric wall portions, a second electrically conductive annular member fixedly secured within an end portion of said coil in abutting relationship to one end of said cylindrical member, said first and second members being electrically interconnected, being provided with aligned radial slots and being electrically insulated from said helical coil, a third electrically conductive ring member positioned within said annular member and provided with a radial slot, and means to supply a cooling fluid to the space between said concentric wall portions.
  • High frequency heating apparatus comprising a helical coil member for generating a high frequency heating field, a first electrically conductive cylindrical member fixedly secured within said coil, a second electrically conductive annular member fixedly secured within an end por- REFERENCES CITED

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
US792218A 1944-10-18 1947-12-17 High-frequency heating arrangement Expired - Lifetime US2485843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2485843X 1944-10-18

Publications (1)

Publication Number Publication Date
US2485843A true US2485843A (en) 1949-10-25

Family

ID=10908135

Family Applications (1)

Application Number Title Priority Date Filing Date
US792218A Expired - Lifetime US2485843A (en) 1944-10-18 1947-12-17 High-frequency heating arrangement

Country Status (2)

Country Link
US (1) US2485843A (en))
NL (1) NL69280C (en))

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643325A (en) * 1950-10-06 1953-06-23 Ohio Crankshaft Co Progressive high-frequency heating of variable-dimension shafts
US2749423A (en) * 1951-08-01 1956-06-05 Hartford Nat Bank & Trust Co Device for high-frequency heating
US2759087A (en) * 1953-01-02 1956-08-14 Loftus Engineering Corp Laminated metal liner for induction coils
US2781437A (en) * 1953-09-10 1957-02-12 Magnethermic Corp Induction furnaces
US2841678A (en) * 1955-03-21 1958-07-01 Ohio Crankshaft Co High-frequency inductor arrangement for continuous seam welding
US2898430A (en) * 1958-03-07 1959-08-04 Citroen Sa Andre Induction heating devices
US3249406A (en) * 1963-01-08 1966-05-03 Dow Corning Necked float zone processing of silicon rod
US4195214A (en) * 1976-06-28 1980-03-25 The Continental Group, Inc. Apparatus for induction heating of metal plates with holes
US6255632B1 (en) * 1996-11-25 2001-07-03 Ricoh Company, Ltd. Device with induction heating roller with a projection between coil windings

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408229A (en) * 1943-04-30 1946-09-24 Rca Corp Electrical heating apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408229A (en) * 1943-04-30 1946-09-24 Rca Corp Electrical heating apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643325A (en) * 1950-10-06 1953-06-23 Ohio Crankshaft Co Progressive high-frequency heating of variable-dimension shafts
US2749423A (en) * 1951-08-01 1956-06-05 Hartford Nat Bank & Trust Co Device for high-frequency heating
US2759087A (en) * 1953-01-02 1956-08-14 Loftus Engineering Corp Laminated metal liner for induction coils
US2781437A (en) * 1953-09-10 1957-02-12 Magnethermic Corp Induction furnaces
US2841678A (en) * 1955-03-21 1958-07-01 Ohio Crankshaft Co High-frequency inductor arrangement for continuous seam welding
US2898430A (en) * 1958-03-07 1959-08-04 Citroen Sa Andre Induction heating devices
US3249406A (en) * 1963-01-08 1966-05-03 Dow Corning Necked float zone processing of silicon rod
US4195214A (en) * 1976-06-28 1980-03-25 The Continental Group, Inc. Apparatus for induction heating of metal plates with holes
US6255632B1 (en) * 1996-11-25 2001-07-03 Ricoh Company, Ltd. Device with induction heating roller with a projection between coil windings

Also Published As

Publication number Publication date
NL69280C (en))

Similar Documents

Publication Publication Date Title
US2485843A (en) High-frequency heating arrangement
US2408229A (en) Electrical heating apparatus
KR890702043A (ko) 단일 초전도 전자석
KR102276102B1 (ko) 웨이퍼 가열 장치
GB1365193A (en) Inductor arrangement for induction heating
US2404404A (en) High-frequency apparatus
US2868944A (en) Electric fluid heater
US3946197A (en) Electrode water heating boiler
US1362622A (en) Electric heater
US2572646A (en) Apparatus for high-frequency heating and sealing fixtures
US2825033A (en) Radio frequency transformer
US2247133A (en) Current supply means
US2517425A (en) Arrangement of electronic discharge tube equipment for the thermal treatment of metals by high-frequency currents
US2525336A (en) Method for simultaneously induction heating a plurality of elements
US2248280A (en) Machine for heating metal bars and tubes
US2716695A (en) Induction heating unit
US2542841A (en) High-frequency coupling apparatus
US2993109A (en) Rotating transformer for electric resistance seam welding of tubing and the like
CN105296736B (zh) 感应加热设备
US2655636A (en) Variable ratio transformer
JPS6249710B2 (en))
US3686459A (en) Multiple inductor unit for induction heat device
US1515729A (en) Electrical heater
US3671703A (en) Device for crucible-free, floating zone melting a crystalline
US3300566A (en) Electric furnaces