GB1096992A - Improvements in radiation detectors - Google Patents

Improvements in radiation detectors

Info

Publication number
GB1096992A
GB1096992A GB807/64A GB80764A GB1096992A GB 1096992 A GB1096992 A GB 1096992A GB 807/64 A GB807/64 A GB 807/64A GB 80764 A GB80764 A GB 80764A GB 1096992 A GB1096992 A GB 1096992A
Authority
GB
United Kingdom
Prior art keywords
detector
circuit
radiation
relay
warning
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
GB807/64A
Inventor
Alfred Robert Brown
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.)
Wilkinson Sword Ltd
Graviner Manufacturing Co Ltd
Original Assignee
Wilkinson Sword Ltd
Graviner Manufacturing 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 Wilkinson Sword Ltd, Graviner Manufacturing Co Ltd filed Critical Wilkinson Sword Ltd
Priority to GB807/64A priority Critical patent/GB1096992A/en
Publication of GB1096992A publication Critical patent/GB1096992A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/02Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00Fire alarms; Alarms responsive to explosion
    • G08B17/12Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00Flame sensors

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

1,096,992. Flame and like radiation, detection and monitoring. GRAVINER MANUFACTURING CO. Ltd. and WILKINSON SWORD Ltd. Jan. 8, 1965 [Jan. 8, 1964], No. 807/64. Heading G1A. The invention relates to radiation detection systems particularly for use in the monitoring or detection of ultraviolet from flames. According to the invention a detector is provided having electrodes between which an arc discharge can be initiated by incident radiation. This is connected to an A. C. supply and means are provided performing a controlling, warning or indicating function in response to a change in radiation intensity. In a first embodiment transformer TR1 applies 600 V A. C. across detector PC1 and R1 and R2 in series. A capacitor C4 is in parallel with PC1. Above the instantaneous voltage at which the detector breaks down in the presence of radiation an oscillating voltage appears across PC1 due to the repeated charge and discharge of C4. The voltage developed across R2 is applied to a discriminator comprising a multi-vibrator T1, T2 and negative half cycles cause T2 to conduct and energize relay RL resulting in illumination of warning lamp L1. Capacitor C2 holds the relay during the positive half cycles. It is stated that a short circuit in the detector resulting in the application of the transformer secondary waveform to R1 and R2 results in a signal of lower peak amplitude being applied to the discriminator circuit, such lower signal not being capable of operating the relay. Other embodiments rely on the breakdown of the detector to apply an A. C. voltage to a bridge rectifier energizing a lamp control relay. An integrating circuit introducing a time delay may be incorporated to reduce the effect of spurious signals. In the circuit of Fig. 3 (not shown) a bridge rectifier is in series with the detector and its smoothed D. C. output applied to a relay controlling the warning circuit. In a more complex circuit the bridge rectifier output controls this warning device via a silicon controlled rectifier.
GB807/64A 1964-01-08 1964-01-08 Improvements in radiation detectors Expired GB1096992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB807/64A GB1096992A (en) 1964-01-08 1964-01-08 Improvements in radiation detectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB807/64A GB1096992A (en) 1964-01-08 1964-01-08 Improvements in radiation detectors

Publications (1)

Publication Number Publication Date
GB1096992A true GB1096992A (en) 1967-12-29

Family

ID=9710846

Family Applications (1)

Application Number Title Priority Date Filing Date
GB807/64A Expired GB1096992A (en) 1964-01-08 1964-01-08 Improvements in radiation detectors

Country Status (1)

Country Link
GB (1) GB1096992A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050953A1 (en) * 1980-10-23 1982-05-05 Honeywell Inc. Flame detection circuit
CN102735666A (en) * 2012-06-28 2012-10-17 吴江市宏达探伤器材有限公司 Ultraviolet crack inspection lamp
DE102015222263B3 (en) * 2015-11-11 2017-05-24 Viessmann Werke Gmbh & Co Kg METHOD AND DEVICE FOR FLAME SIGNAL DETECTION

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050953A1 (en) * 1980-10-23 1982-05-05 Honeywell Inc. Flame detection circuit
CN102735666A (en) * 2012-06-28 2012-10-17 吴江市宏达探伤器材有限公司 Ultraviolet crack inspection lamp
DE102015222263B3 (en) * 2015-11-11 2017-05-24 Viessmann Werke Gmbh & Co Kg METHOD AND DEVICE FOR FLAME SIGNAL DETECTION
US10704785B2 (en) 2015-11-11 2020-07-07 Viessmann Werke Gmbh & Co. Kg Method and device for flame signal detection

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