GB1431177A - Yarn heating apparatus - Google Patents

Yarn heating apparatus

Info

Publication number
GB1431177A
GB1431177A GB3173772A GB3173772A GB1431177A GB 1431177 A GB1431177 A GB 1431177A GB 3173772 A GB3173772 A GB 3173772A GB 3173772 A GB3173772 A GB 3173772A GB 1431177 A GB1431177 A GB 1431177A
Authority
GB
United Kingdom
Prior art keywords
circuit
resistance
current
brushes
collector
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
GB3173772A
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.)
Platt Saco Lowell Ltd
Original Assignee
Platt Saco Lowell 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 Platt Saco Lowell Ltd filed Critical Platt Saco Lowell Ltd
Priority to GB3173772A priority Critical patent/GB1431177A/en
Publication of GB1431177A publication Critical patent/GB1431177A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
    • G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
    • 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
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
    • G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
    • 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
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

1431177 Automatic control of temperature; automatic current regulation PLATT SACO LOWELL Ltd 19 June 1973 [6 July 1972] 31737/72 Heading G3R and G3X In the automatic temperature control of a roller (1) Fig. 1 (not shown) of a yarn heating apparatus, a resistance temperature sensor 6, is mounted in the roller and is connected via a slipring and brush assembly 4, 5, 8, 9, 12, 13 to a circuit 14, the input impedance of the circuit 14 being high compared with that of the slip-ring and brush assembly so that variations in the impedance of the latter has substantially no effect on a control signal from the circuit 14. The sensor 6 is supplied with constant magnitude direct current from a circuit 10 so that the voltage thereacross is proportional to the temperature sensed and is applied to the inputs of a 1:1 amplifier 16 via brushes 12, 13 and slip rings 4, 5. The input impedance of the amplifier circuit is sufficiently high relative to the contact resistance of the brushes 12, 13 that little or no current flows through these brushes and hence there is substantially no voltage drop across the brushes and rings. The voltage applied to the amplifier will therefore be substantially that across the sensor. An output signal X from the amplifier is dependent upon the temperature sensed and is applied to a controller (not shown) for comparison with a desired temperature value for the roller, to produce an error signal. The error signal is used to control the supply of A.C. to a stationary induction heating coil (12) (Fig.1) arranged within the rotating roller 1. Constant current circuit. A potential divider including C 1 R 1 applies a reference voltage to the base of T 1 which in turn applies a constant voltage to the emitter of T 2 . A current C 2 R 2 is arranged to increase the resistance between the base and collector of T 2 when increases in the resistance of the slip-ring/brush arrangement 4, 9 and 5, 8 occur. The increase in the base/collector resistance of T 2 reduces the bias on T 2 and reduces the collector current thereof passing through a 470K# resistor. Thus the voltage applied across the base/collector of T 2 will increase to compensate for brush contact. Resistance increase and constant current will be supplied to the sensor 6.
GB3173772A 1972-07-06 1972-07-06 Yarn heating apparatus Expired GB1431177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3173772A GB1431177A (en) 1972-07-06 1972-07-06 Yarn heating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3173772A GB1431177A (en) 1972-07-06 1972-07-06 Yarn heating apparatus

Publications (1)

Publication Number Publication Date
GB1431177A true GB1431177A (en) 1976-04-07

Family

ID=10327636

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3173772A Expired GB1431177A (en) 1972-07-06 1972-07-06 Yarn heating apparatus

Country Status (1)

Country Link
GB (1) GB1431177A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953663A1 (en) * 1998-04-27 1999-11-03 Murata Kikai Kabushiki Kaisha Control device for a yarn heater
WO2014182524A3 (en) * 2013-05-10 2015-01-15 Illinois Tool Works Inc. Rotatable temperature sensing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953663A1 (en) * 1998-04-27 1999-11-03 Murata Kikai Kabushiki Kaisha Control device for a yarn heater
WO2014182524A3 (en) * 2013-05-10 2015-01-15 Illinois Tool Works Inc. Rotatable temperature sensing device
CN105190267A (en) * 2013-05-10 2015-12-23 伊利诺斯工具制品有限公司 Rotatable temperature sensing device
US9631986B2 (en) 2013-05-10 2017-04-25 Illinois Tool Works Inc. Rotatable temperature sensing device
CN105190267B (en) * 2013-05-10 2018-03-13 伊利诺斯工具制品有限公司 Rotatable temperature sensing device

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Legal Events

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