GB1286986A - Controlled atmospheric furnace - Google Patents

Controlled atmospheric furnace

Info

Publication number
GB1286986A
GB1286986A GB48677/69A GB4867769A GB1286986A GB 1286986 A GB1286986 A GB 1286986A GB 48677/69 A GB48677/69 A GB 48677/69A GB 4867769 A GB4867769 A GB 4867769A GB 1286986 A GB1286986 A GB 1286986A
Authority
GB
United Kingdom
Prior art keywords
gas
furnace
atmosphere
pipe
aperture
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
GB48677/69A
Inventor
Joseph A Lincoln
Orville Eugene Cullen
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.)
Midland Ross Corp
Original Assignee
Midland Ross Corp
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 Midland Ross Corp filed Critical Midland Ross Corp
Publication of GB1286986A publication Critical patent/GB1286986A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F27D99/0075—Gas curtain seals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Articles (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

1286986 Preventing entry of air to furnaces MIDLAND-ROSS CORP 3 Oct 1969 [13 Nov 1968] 48677/69 Heading F4B The outlet aperture, of a controlled atmosphere furnace, is provided with apertured pipes 54, 56 to produce a resultant high velocity gas curtain directed across and at least slightly outwardly of the aperture, to prevent ingress of air. The gas stream from rotatable pipe 56 may be of an inert or non-oxidizing gas whilst that from pipe 54 may be a flame curtain if the furnace atmosphere is combustible. The aperture in the water cooled door frame 46 is closable by an hydraulically slidable door 28, the movement of which controls the gas supply to the apertured pipes 54, 56. Movement of the door may also control the addition of atmosphere restoring gas from pipe 62 to the normal furnace atmosphere gas supplied through pipe 60, to compensate for atmospheric disturbances caused by opening door 28. Alternatively the restoring gas flow may be controlled by an atmosphere sensor (not shown). In modifications, (Figs. 5-10, not shown) alternative locations for and combinations of curtain producing gas pipes are disclosed. The furnace, which may be used for carburizing, nitriding, bright annealing, normalizing, or hardening may be of the rotary hearth type (Fig. 3, not shown) or a tunnel furnace. In the latter case the aperture is located in a vestibule 22 adjacent to but closed off from the main tunnel portion.
GB48677/69A 1968-11-13 1969-10-03 Controlled atmospheric furnace Expired GB1286986A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US77545968A 1968-11-13 1968-11-13

Publications (1)

Publication Number Publication Date
GB1286986A true GB1286986A (en) 1972-08-31

Family

ID=25104496

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48677/69A Expired GB1286986A (en) 1968-11-13 1969-10-03 Controlled atmospheric furnace

Country Status (5)

Country Link
US (1) US3575398A (en)
JP (1) JPS4814523B1 (en)
CA (1) CA918418A (en)
GB (1) GB1286986A (en)
SE (1) SE360111B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139741A (en) * 1983-05-04 1984-11-14 Air Prod & Chem Method of operating heat treatment furnace
GB2197938A (en) * 1986-11-26 1988-06-02 Ipsen Ind Int Gmbh Creation of flame fronts at charging openings of heat-treatment furnaces
DE3827267A1 (en) * 1988-08-31 1990-03-08 Herbert Koch Gassing apparatus for heat-treatment installations with protective- or reactive-gas operation

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994210A (en) * 1975-11-24 1976-11-30 Powlesland Engineering Limited Jet fume control systems
JPS5448942U (en) * 1977-09-12 1979-04-05
FR2612619B1 (en) * 1987-03-17 1989-07-13 Air Liquide PROCESS FOR LIMITING AIR INTAKE IN AN OVEN AND OVEN FOR CARRYING OUT THIS METHOD
US4898319A (en) * 1987-12-04 1990-02-06 Bruce T. Williams Ambient air exclusion system for brazing ovens
US4823680A (en) * 1987-12-07 1989-04-25 Union Carbide Corporation Wide laminar fluid doors
DE3743598A1 (en) * 1987-12-22 1989-07-13 Kramer Carl DEVICE FOR CONTACT-FREE SEALING AN OPENING AGAINST LEAKING OR INLETING GAS
FR2627849B1 (en) * 1988-02-26 1991-07-12 Vieillard Guy SHUTTERING DEVICE FOR SETTING UP A MEASUREMENT OR INTERVENTION APPARATUS IN A HOT AND PRESSURE ATMOSPHERE ENCLOSURE
IT1220312B (en) * 1988-03-15 1990-06-15 Mouva Matrix Srl OVEN WITH CONTINUOUS FEEDING OF THE PIECES FOR THE SINTERING OF PRESSED METAL POWDERS
US4940376A (en) * 1988-10-12 1990-07-10 Mph Industries, Inc. Scrap loader for molten metal furnace
US5125556A (en) * 1990-09-17 1992-06-30 Electrovert Ltd. Inerted IR soldering system
US5230460A (en) * 1990-06-13 1993-07-27 Electrovert Ltd. High volume convection preheater for wave soldering
US5306209A (en) * 1992-05-04 1994-04-26 Lang Fred D Contaminant shield for viewing ports
FR2695715B1 (en) * 1992-09-11 1994-11-25 Unimetall Sa Scouring door of an electric arc furnace.
US5655563A (en) * 1994-12-19 1997-08-12 Ecolab Inc. Dispensing apparatus with line pressure diverter
IL119434A (en) * 1995-11-27 2000-01-31 Boc Group Inc Furnace
US5965048A (en) * 1998-11-20 1999-10-12 General Electric Company Heated chamber including an open wall with a gas curtain
US20020195056A1 (en) * 2000-05-12 2002-12-26 Gurtej Sandhu Versatile atomic layer deposition apparatus
FR2917817B1 (en) * 2007-06-21 2016-05-27 Stein Heurtey DEVICE FOR LIMITING THE EXHAUST OF COMBUSTION FUME AT THE ENTRANCE OF A STEEL HEATING FURNACE
DE102009041041B4 (en) * 2009-09-10 2011-07-14 ALD Vacuum Technologies GmbH, 63450 Method and apparatus for hardening workpieces, as well as work hardened workpieces
US10196730B2 (en) 2009-09-10 2019-02-05 Ald Vacuum Technologies Gmbh Method and device for hardening workpieces, and workpieces hardened according to the method
CN102032795A (en) * 2010-11-29 2011-04-27 苏州中门子科技有限公司 Air curtain type air supply device for thermal treatment furnace
US9242313B2 (en) * 2012-07-30 2016-01-26 General Electric Company Welding furnace and viewport assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US549235A (en) * 1895-11-05 Friedrich ernst gatcke
US1357790A (en) * 1919-10-04 1920-11-02 Marx Richard Furnace
US1851831A (en) * 1931-02-06 1932-03-29 Carl I Hayes Atmospheric control for heat treating furnaces
US3039407A (en) * 1957-08-01 1962-06-19 Foster Wheeler Corp Closure means for pressurized furnaces
US3142272A (en) * 1960-07-20 1964-07-28 Foster Wheeler Corp Safety closure means for pressurized furnaces
US3270655A (en) * 1964-03-25 1966-09-06 Howard P Guirl Air curtain door seal
US3356541A (en) * 1965-08-20 1967-12-05 Midland Ross Corp Carburizing method and apparatus
US3387600A (en) * 1966-04-13 1968-06-11 Berj A. Terzian Oven with automatic air curtain means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139741A (en) * 1983-05-04 1984-11-14 Air Prod & Chem Method of operating heat treatment furnace
GB2197938A (en) * 1986-11-26 1988-06-02 Ipsen Ind Int Gmbh Creation of flame fronts at charging openings of heat-treatment furnaces
DE3827267A1 (en) * 1988-08-31 1990-03-08 Herbert Koch Gassing apparatus for heat-treatment installations with protective- or reactive-gas operation

Also Published As

Publication number Publication date
US3575398A (en) 1971-04-20
JPS4814523B1 (en) 1973-05-08
SE360111B (en) 1973-09-17
CA918418A (en) 1973-01-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees