GB261116A - Improvements in and relating to sensitive electrical regulating or indicating devices - Google Patents

Improvements in and relating to sensitive electrical regulating or indicating devices

Info

Publication number
GB261116A
GB261116A GB2079625A GB2079625A GB261116A GB 261116 A GB261116 A GB 261116A GB 2079625 A GB2079625 A GB 2079625A GB 2079625 A GB2079625 A GB 2079625A GB 261116 A GB261116 A GB 261116A
Authority
GB
United Kingdom
Prior art keywords
thermocouple
current
resistance
pointer
alarm
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
GB2079625A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2079625A priority Critical patent/GB261116A/en
Publication of GB261116A publication Critical patent/GB261116A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/026—Arrangements for signalling failure or disconnection of thermocouples

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

261,116. Foster, C. E. Aug. 19, 1925. Pyrometers.-An electrical regulating or indicating device employing a thermocouple is provided with means for operating an alarm and/or control automatically on failure of the thermocouple. The thermocouple 1, 2 has its hot junction at 3 and its cold junctions at 4, 5, and is connected to a milli voltmeter comprising an adjusting resistance 8, control springs 9, 10 and moving coil 11. The junction 3 is subjected to heat from an electric furnace, and the temperature is indicated by a pointer such as 16. The pointer is periodically depressed by a presser bar carrying a contact 19 so as to complete a circuit at a predetermined temperature and actuate an alarm and/or automatic control. To provide for breakage or failure of the thermocouple, an additional circuit comprising a battery 15 and resistance 14 is connected at 4, 5. The. resistance 14 is relatively high compared with all other resistances, and the current from the battery only affects slightly the zero setting of the voltmeter, and most of this current passes through the low resistance 1, 3, 2. If the thermocouple breaks, the whole current from the battery is diverted through the millivoltmeter, causing an increased deflection of the pointer and completion of a circuit through contact 21, which actuates an alarm and/or reduces or cuts off the current to the furnace.
GB2079625A 1925-08-19 1925-08-19 Improvements in and relating to sensitive electrical regulating or indicating devices Expired GB261116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2079625A GB261116A (en) 1925-08-19 1925-08-19 Improvements in and relating to sensitive electrical regulating or indicating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2079625A GB261116A (en) 1925-08-19 1925-08-19 Improvements in and relating to sensitive electrical regulating or indicating devices

Publications (1)

Publication Number Publication Date
GB261116A true GB261116A (en) 1926-11-18

Family

ID=10151798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2079625A Expired GB261116A (en) 1925-08-19 1925-08-19 Improvements in and relating to sensitive electrical regulating or indicating devices

Country Status (1)

Country Link
GB (1) GB261116A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011156186A1 (en) * 2010-06-07 2011-12-15 Rosemount Inc. Process variable transmitter with thermocouple polarity detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011156186A1 (en) * 2010-06-07 2011-12-15 Rosemount Inc. Process variable transmitter with thermocouple polarity detection
JP2013528290A (en) * 2010-06-07 2013-07-08 ローズマウント インコーポレイテッド Process variable transmitter with thermocouple polarity detection
RU2521746C1 (en) * 2010-06-07 2014-07-10 Роузмаунт Инк. Transmitter of process parameters with determination of polarity of thermocouple
US8864378B2 (en) 2010-06-07 2014-10-21 Rosemount Inc. Process variable transmitter with thermocouple polarity detection

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