GB1380525A - Apparatus for pulse hardening the surface of steel objects - Google Patents

Apparatus for pulse hardening the surface of steel objects

Info

Publication number
GB1380525A
GB1380525A GB706373A GB706373A GB1380525A GB 1380525 A GB1380525 A GB 1380525A GB 706373 A GB706373 A GB 706373A GB 706373 A GB706373 A GB 706373A GB 1380525 A GB1380525 A GB 1380525A
Authority
GB
United Kingdom
Prior art keywords
workpiece
increase
valve
decrease
hardening
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
Application number
GB706373A
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.)
Impulsphysik GmbH
Original Assignee
Impulsphysik GmbH
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 Impulsphysik GmbH filed Critical Impulsphysik GmbH
Priority to GB706373A priority Critical patent/GB1380525A/en
Publication of GB1380525A publication Critical patent/GB1380525A/en
Expired legal-status Critical Current

Links

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
    • H05B6/04—Sources of current

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Abstract

1380525 Automatic control of temperature IMPULSPHYSIK GmbH 13 Feb 1973 7063/73 Heading G3R [Also in Divisions C7, H2, and H3-H5] Apparatus for hardening the surface of a steel workpiece 20 by high frequency induction heating comprises an oscillator valve 3, a cavity resonator 1 and an inductor 17 coupled to the resonator by a loop 16. The radiation emitted by the heated workpiece is detected by a photo-diode 54 after passing through a selected orange, green or blue filter 53. The pulse produced by the diode in the circuit 55, 56 is amplified and fed to the grid of a thyratron 59 thereby switching on the thyratron and controlling the output pulse width of the valve 3. A constant hardening temperature of the workpiece is therefore maintained since any increase or decrease of temperature above or below that determined by selection of the filter 53 causes a corresponding decrease of increase in the output pulse width of the valve 3 and consequently a decrease or increase in the heating of the workpiece.
GB706373A 1973-02-13 1973-02-13 Apparatus for pulse hardening the surface of steel objects Expired GB1380525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB706373A GB1380525A (en) 1973-02-13 1973-02-13 Apparatus for pulse hardening the surface of steel objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB706373A GB1380525A (en) 1973-02-13 1973-02-13 Apparatus for pulse hardening the surface of steel objects

Publications (1)

Publication Number Publication Date
GB1380525A true GB1380525A (en) 1975-01-15

Family

ID=9825912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB706373A Expired GB1380525A (en) 1973-02-13 1973-02-13 Apparatus for pulse hardening the surface of steel objects

Country Status (1)

Country Link
GB (1) GB1380525A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1768462A3 (en) * 2003-07-02 2007-09-26 iTherm Technologies LP Heating systems and methods

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1768462A3 (en) * 2003-07-02 2007-09-26 iTherm Technologies LP Heating systems and methods
US7652231B2 (en) 2003-07-02 2010-01-26 Itherm Technologies, Lp Apparatus for delivering harmonic inductive power

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee