GB1240187A - Sensitive light and smoke detecting device with memory system - Google Patents

Sensitive light and smoke detecting device with memory system

Info

Publication number
GB1240187A
GB1240187A GB49887/68A GB4988768A GB1240187A GB 1240187 A GB1240187 A GB 1240187A GB 49887/68 A GB49887/68 A GB 49887/68A GB 4988768 A GB4988768 A GB 4988768A GB 1240187 A GB1240187 A GB 1240187A
Authority
GB
United Kingdom
Prior art keywords
photo
detecting device
memory system
sensitive light
smoke detecting
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
GB49887/68A
Inventor
Shinji Saito
Shinji Mikami
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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Seizosho 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 Tokyo Keiki Seizosho Co Ltd filed Critical Tokyo Keiki Seizosho Co Ltd
Publication of GB1240187A publication Critical patent/GB1240187A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/42—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits
    • 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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,240,187. Photo-conductor circuit. TOKYO KEIKI SEIZOSHO CO. Ltd. Oct.21, 1968 [Oct.25, 1967], No.49887/68. Heading G1A. In a light responsive circuit a photo-conductive device 4 is connected in series with a parallel circuit comprising a discharge tube 3 in parallel with a resistor 5 and the discharge tube is optically coupled with the photo-conductive device to form a lock-up device. Application to a smoke detector producing an output on terminals 9, 10 is referred to, and an arrangement including a light barrier in front of the detector so that it is energized only by scattered light is described. The apparatus may be used also for aerosols and particles suspended in liquids.
GB49887/68A 1967-10-25 1968-10-21 Sensitive light and smoke detecting device with memory system Expired GB1240187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6832667 1967-10-25

Publications (1)

Publication Number Publication Date
GB1240187A true GB1240187A (en) 1971-07-21

Family

ID=13370572

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49887/68A Expired GB1240187A (en) 1967-10-25 1968-10-21 Sensitive light and smoke detecting device with memory system

Country Status (2)

Country Link
US (1) US3663859A (en)
GB (1) GB1240187A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070218983A1 (en) * 2006-03-15 2007-09-20 Charles Lombardo Progressive gaming systems and methods

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2386320A (en) * 1943-03-24 1945-10-09 Alco Gravure Division Of Publi Exposure meter
US2849622A (en) * 1946-07-19 1958-08-26 Darrin H Gridley Control circuits
US3034011A (en) * 1959-12-03 1962-05-08 Lockheed Aircraft Corp Combined optical and electronic circuit devices
US3213441A (en) * 1962-06-27 1965-10-19 Gen Dynamics Corp Readout display system with memory
US3233781A (en) * 1963-05-08 1966-02-08 Savin Business Machines Corp Toner control system
US3376425A (en) * 1965-10-12 1968-04-02 Robert H Wager Co Inc Smoke density and color indicating means

Also Published As

Publication number Publication date
US3663859A (en) 1972-05-16

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