GB519325A - Improvements in or relating to heating furnaces - Google Patents

Improvements in or relating to heating furnaces

Info

Publication number
GB519325A
GB519325A GB2740438A GB2740438A GB519325A GB 519325 A GB519325 A GB 519325A GB 2740438 A GB2740438 A GB 2740438A GB 2740438 A GB2740438 A GB 2740438A GB 519325 A GB519325 A GB 519325A
Authority
GB
United Kingdom
Prior art keywords
contacts
chamber
compartment
dampers
closed
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
GB2740438A
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.)
CURRAN BROTHERS Ltd
Original Assignee
CURRAN BROTHERS Ltd
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 CURRAN BROTHERS Ltd filed Critical CURRAN BROTHERS Ltd
Priority to GB2740438A priority Critical patent/GB519325A/en
Publication of GB519325A publication Critical patent/GB519325A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

519,325. Metal-heating furnaces. CURRAN BROS., Ltd., and CURRAN, J. Sept. 20, 1938, No. 27404. [Class 51 (ii)] [Also in Group XXXV] A furnace for heating metals such as cartridge cases comprises a heating chamber 1, preheating chamber 7 and cooling chamber 8 with means for circulating gas through the chambers 7 and 8 which are connected by flues 9, 10. Doors 3 and 4 are provided at the ends of the chamber 1 and doors 5, 6 at the outer ends of the chambers 7, 8. The preheating chamber 7 is divided by a door 5a into compartments 12, 13. Electric heating elements. 17, 16 are provided in the chamber 1 and compartment 12. The circulation of gases is effected by a fan 11. The stream of gas passing from the cooling chamber 8 to the preheating chamber 7 is divided between the compartments 12, 13 by dampers 15, 18 under the control of thermostats arranged in the chamber 8 and compartment 12. In the control circuit shown in Fig. 2, current from the mains 27, 28 passes through contacts 26 to a thermostat C in the compartment 12 and a solenoid or motor 24 for operating the dampers 15, 18. The dampers are closed when the contacts 26 are in the off position. When the contacts 26 are closed current also passes through leads 29, 30 to the fan circuit. Current also passes from the mains 27, 28 through contacts 25 to the heating elements 16 in the compartment 12. These contacts 25 are controlled by a circuit including contacts 32 and thermostats A, B in the chamber 8 and compartment 12 respectively. When the temperature in the compartment 12 rises above a predetermined value contacts 25 are opened, contacts 33 are closed and a circuit is closed to close the contacts 26 to start the fan 11. The thermostat C may then cause opening of the dampers 15, 18.
GB2740438A 1938-09-20 1938-09-20 Improvements in or relating to heating furnaces Expired GB519325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2740438A GB519325A (en) 1938-09-20 1938-09-20 Improvements in or relating to heating furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2740438A GB519325A (en) 1938-09-20 1938-09-20 Improvements in or relating to heating furnaces

Publications (1)

Publication Number Publication Date
GB519325A true GB519325A (en) 1940-03-21

Family

ID=10259020

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2740438A Expired GB519325A (en) 1938-09-20 1938-09-20 Improvements in or relating to heating furnaces

Country Status (1)

Country Link
GB (1) GB519325A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120233A2 (en) * 1983-03-01 1984-10-03 Joachim Dr.-Ing. Wünning Process for heat recovery during the heat treatment of metallic articles, and tunnel furnace therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120233A2 (en) * 1983-03-01 1984-10-03 Joachim Dr.-Ing. Wünning Process for heat recovery during the heat treatment of metallic articles, and tunnel furnace therefor
EP0120233A3 (en) * 1983-03-01 1985-07-03 Joachim Dr.-Ing. Wünning Process for heat recovery during the heat treatment of metallic articles, and tunnel furnace therefor

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