GB1304811A - - Google Patents

Info

Publication number
GB1304811A
GB1304811A GB1304811DA GB1304811A GB 1304811 A GB1304811 A GB 1304811A GB 1304811D A GB1304811D A GB 1304811DA GB 1304811 A GB1304811 A GB 1304811A
Authority
GB
United Kingdom
Prior art keywords
relay
sensor unit
gas concentration
alarm
contacts
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
Other languages
English (en)
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 filed Critical
Publication of GB1304811A publication Critical patent/GB1304811A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
GB1304811D 1971-04-02 1971-04-02 Expired GB1304811A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB858771 1971-04-02

Publications (1)

Publication Number Publication Date
GB1304811A true GB1304811A (enrdf_load_stackoverflow) 1973-01-31

Family

ID=9855359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1304811D Expired GB1304811A (enrdf_load_stackoverflow) 1971-04-02 1971-04-02

Country Status (1)

Country Link
GB (1) GB1304811A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116163806A (zh) * 2022-12-02 2023-05-26 中煤天津设计工程有限责任公司 一种煤矿巷道底鼓监测警报装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116163806A (zh) * 2022-12-02 2023-05-26 中煤天津设计工程有限责任公司 一种煤矿巷道底鼓监测警报装置

Similar Documents

Publication Publication Date Title
GB1231140A (enrdf_load_stackoverflow)
IT1031167B (it) Fessaggio di terminali per apparati a induzione e metodi per fare il medesimo
ES405314A1 (es) Sistema para percibir la necesidad de regeneracion de mate-rial ablandador de auga en un tanque de ablandamiento.
GB1357573A (en) Corrosion rate meter
GB1237625A (en) Improvements in or relating to direct current supply circuits for measuring bridges
GB1304811A (enrdf_load_stackoverflow)
GB1509625A (en) Apparatus for and method of measuring the mobility of colloids in an electrical field
ES459217A1 (es) Un circuito receptor de via controlado en fase.
GB1518300A (en) Impedance multipliers
JPS5593024A (en) Superconductive liquid level indicator
JPS5336117A (en) Circuit connection system
GB1311720A (en) High voltage monitoring systems
GB1429180A (en) Alarm circuits
GB1495456A (en) Low consumption electronic apparatus
GB1316498A (en) Temperature compensation arrangements
ES420912A1 (es) Perfeccionamientos en un aparato electrico de medida y de vigilancia de un parametro.
GB1419361A (en) Multi-channel combustible gas detector
GB1065134A (en) Automatic device for measuring methane content in underground mines
GB1233402A (enrdf_load_stackoverflow)
ES424399A1 (es) Perfeccionamientos en instalaciones para la alimentacion decorriente alterna a un consumidor.
JPS5237079A (en) Impedance measuring device
GB966611A (en) Protective arrangements for electrical circuits and apparatus
JPS5245217A (en) Power system trouble distinguish system
GB928960A (en) An arrangement for the measurement of temperature, more especially of wires or the like, in a continuous process
GB1256676A (enrdf_load_stackoverflow)

Legal Events

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