GB1149873A - Roof extract unit - Google Patents

Roof extract unit

Info

Publication number
GB1149873A
GB1149873A GB890767A GB890767A GB1149873A GB 1149873 A GB1149873 A GB 1149873A GB 890767 A GB890767 A GB 890767A GB 890767 A GB890767 A GB 890767A GB 1149873 A GB1149873 A GB 1149873A
Authority
GB
United Kingdom
Prior art keywords
fan
roof
shutters
starters
feb
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
GB890767A
Inventor
Alan Wright
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.)
WRIGHT FAVELL Ltd
Original Assignee
WRIGHT FAVELL 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 WRIGHT FAVELL Ltd filed Critical WRIGHT FAVELL Ltd
Priority to GB890767A priority Critical patent/GB1149873A/en
Publication of GB1149873A publication Critical patent/GB1149873A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

1,149,873. Roof ventilators. WRIGHT FAVELL Ltd. 26 Feb., 1968 [24 Feb., 1967], No. 8907/67. Heading F4V. A roof ventilator having a duct portion 1, of galvanized iron or fibre glass, a flange 2 for mounting on the roof, and an operable cowl 3 fitted with a retaining stay 4, is provided with two extractor fans so controlled with interlocking means that; when one fan stops the other is started. A set of pivoted shutters 13 beneath each fan is opened by a reversible electric motor 17 when the appropriate fan is brought into operation. The control means comprises starters each with an over-load cut-out also a timer connected to the starters so that when one starter is tripped the other is activated after say 5 sees. A warning light indicates the changeover. In another embodiment (Fig. 3, not shown) the lower part (1b) of the ventilator is connected to the end of an extraction outlet inside the roof of the building. Also the shutters are opened solely by the air flow caused by each fan. The shutters close by gravity. A strip of felt may be stuck to each shutter to cushion the impact on closing. These embodiments enable one fan to be serviced while the other is operating.
GB890767A 1967-02-24 1967-02-24 Roof extract unit Expired GB1149873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB890767A GB1149873A (en) 1967-02-24 1967-02-24 Roof extract unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB890767A GB1149873A (en) 1967-02-24 1967-02-24 Roof extract unit

Publications (1)

Publication Number Publication Date
GB1149873A true GB1149873A (en) 1969-04-23

Family

ID=9861621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB890767A Expired GB1149873A (en) 1967-02-24 1967-02-24 Roof extract unit

Country Status (1)

Country Link
GB (1) GB1149873A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141817A (en) * 1983-06-20 1985-01-03 Waterloo Grille Company Limite Ventilating air flow damper
EP3524897A1 (en) * 2018-02-13 2019-08-14 Langmatz GmbH Fan system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141817A (en) * 1983-06-20 1985-01-03 Waterloo Grille Company Limite Ventilating air flow damper
EP3524897A1 (en) * 2018-02-13 2019-08-14 Langmatz GmbH Fan system

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