GB190169A - Improvements in fire alarm apparatuses - Google Patents

Improvements in fire alarm apparatuses

Info

Publication number
GB190169A
GB190169A GB33648/22A GB3364822A GB190169A GB 190169 A GB190169 A GB 190169A GB 33648/22 A GB33648/22 A GB 33648/22A GB 3364822 A GB3364822 A GB 3364822A GB 190169 A GB190169 A GB 190169A
Authority
GB
United Kingdom
Prior art keywords
chamber
pinion
engage
engaging
expansion
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
GB33648/22A
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.)
MANOEL DE ORTIGAO BURNAY
Original Assignee
MANOEL DE ORTIGAO BURNAY
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 MANOEL DE ORTIGAO BURNAY filed Critical MANOEL DE ORTIGAO BURNAY
Publication of GB190169A publication Critical patent/GB190169A/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
    • 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
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

190,169. Burnay, M. de O. Dec. 10, 1921, [Convention date]. Alarms operated by expansion of gases. - In fire-alarms of the type in which expansion of air in a chamber 1, forces out the corrugated wall of a dilatable chamber 3 to engage a contact 30 and close an electric alarm circuit, improved means for amplifying the movement of the flexible wall of the chamber 3 are provided. A member 40 oscillates about screw points 41, 42 and has a transverse arm 44 engaging one or more superposed washers 45 on the chamber 3, a rod 46 on the oscillating member 40 actuating a toothed sector 47 engaging a pinion 48. The spindle 49 of this pinion is spring-controlled to maintain the amplifying element in operative engagement and carries a contact arm 50 adapted to engage. a fixed contact. Adjustment is effected by varying the number of washers 45. The device is mounted on the chamber 1 by means of screwthreaded yokes 43 secured by nuts 53, 54 to a plate 6. Specification 182,421 is referred to. The Specification as open to inspection under Sect. 91 (3) (a) describes a venting-device to compensate for normal variations of temperature, such device consisting of a capillary tube 31 opening at 32 to the interior of the chamber 1 and at 33 to the atmosphere, the orifice 33 being covered if desired by a washer 34 of wadding &c. The tube 31, instead of being straight, may be of coiled form. This subject-matter does not appear in the Specification as accepted.
GB33648/22A 1921-12-10 1922-12-09 Improvements in fire alarm apparatuses Expired GB190169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR190169X 1921-12-10

Publications (1)

Publication Number Publication Date
GB190169A true GB190169A (en) 1923-07-05

Family

ID=8878983

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33648/22A Expired GB190169A (en) 1921-12-10 1922-12-09 Improvements in fire alarm apparatuses

Country Status (1)

Country Link
GB (1) GB190169A (en)

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