GB603452A - Improvements in or relating to kilns or ovens for firing pottery or the like - Google Patents

Improvements in or relating to kilns or ovens for firing pottery or the like

Info

Publication number
GB603452A
GB603452A GB1843045A GB1843045A GB603452A GB 603452 A GB603452 A GB 603452A GB 1843045 A GB1843045 A GB 1843045A GB 1843045 A GB1843045 A GB 1843045A GB 603452 A GB603452 A GB 603452A
Authority
GB
United Kingdom
Prior art keywords
relay
contact
temperature
tap
tap changing
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
GB1843045A
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.)
ERNEST MEAD
Metropolitan Vickers Electrical Co Ltd
Original Assignee
ERNEST MEAD
Metropolitan Vickers Electrical Co 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 ERNEST MEAD, Metropolitan Vickers Electrical Co Ltd filed Critical ERNEST MEAD
Priority to GB1843045A priority Critical patent/GB603452A/en
Publication of GB603452A publication Critical patent/GB603452A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
    • F27D2019/0037—Quantity of electric current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/15—Composition, conformation or state of the charge characterised by the form of the articles
    • F27M2001/1504—Ceramic articles
    • F27M2001/1508—Articles of relatively small dimensions

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • General Induction Heating (AREA)

Abstract

603,452. Automatic control systems for pottery kilns. MEAD, E., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. July 18, 1945, No. 18430. [Class 38 (iv)] Temperature control.-An automatic temperature control system for pottery firing kilns acts by varying the tappings on the heating element supply transformer instead of switching selected elements in and out of circuit. As shown, temperature responsive switches f, r close respectively at the upper and lower limits of the range within which the temperature is to be controlled and energize the operative coil F or R of an induction relay similar in construction to a shaded pole watt-hour meter. Coil TP forms one winding of the relay and also of a transformer having a secondary winding TS supplying relay coils F or R, the field of which combines with the field of TP and causes the relay rotor to turn in a forward or reverse direction, to close contact F1 or F2 and to energize the tap changing 3-phase motor M through relay CF and contact CF1, or relay RF and contact RF1, to vary the heater tappings in the appropriate direction to readjust the temperature. On motion of the tap changing arm, contact S1 is closed and S2 is opened, locking in relay CF or RF through contacts CF2 or RF2, and disconnecting the temperature responsive switches. The relay rotor is restored to normal by the opposite winding to that initially operative, which is energized through arm A, resistance RS, and segment SF or SR when the relay rotor is off normal. On completion of a tap change, S1 opens and S2 closes, stopping the motor and restoring the control circuit so that if contact F or r is still closed a further tap change is initiated. A delay between tap changing operations may be introduced to allow for the thermal capacity of the kiln by delaying the closure of S2 after tap changing. Relays CF, RF may have additional circuits for manual operation.
GB1843045A 1945-07-18 1945-07-18 Improvements in or relating to kilns or ovens for firing pottery or the like Expired GB603452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1843045A GB603452A (en) 1945-07-18 1945-07-18 Improvements in or relating to kilns or ovens for firing pottery or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1843045A GB603452A (en) 1945-07-18 1945-07-18 Improvements in or relating to kilns or ovens for firing pottery or the like

Publications (1)

Publication Number Publication Date
GB603452A true GB603452A (en) 1948-06-16

Family

ID=10112313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1843045A Expired GB603452A (en) 1945-07-18 1945-07-18 Improvements in or relating to kilns or ovens for firing pottery or the like

Country Status (1)

Country Link
GB (1) GB603452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340521A1 (en) * 1976-02-06 1977-09-02 Haarlem Keramisch Inst METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE VARIATION OF A POTTER OVEN

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2340521A1 (en) * 1976-02-06 1977-09-02 Haarlem Keramisch Inst METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE VARIATION OF A POTTER OVEN

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