US3581648A - Arrangement for checking the condition of the air enclosed in small-sized premises such as caravans and ventilating same - Google Patents

Arrangement for checking the condition of the air enclosed in small-sized premises such as caravans and ventilating same Download PDF

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Publication number
US3581648A
US3581648A US821781A US3581648DA US3581648A US 3581648 A US3581648 A US 3581648A US 821781 A US821781 A US 821781A US 3581648D A US3581648D A US 3581648DA US 3581648 A US3581648 A US 3581648A
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United States
Prior art keywords
flame
caravan
monitoring
carbon dioxide
flap
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 - Lifetime
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US821781A
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English (en)
Inventor
Raymond Bernard Faure
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Individual
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Individual
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Filing date
Publication date
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Publication of US3581648A publication Critical patent/US3581648A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F23Q9/08—Pilot flame igniters with interlock with main fuel supply

Definitions

  • the invention covers a safety system protecting caravans and similarly small closed premises against efflux of carbon dioxide and the like inert gases produced by stoves, cooking apparatus and the like located within the caravan. This is obtained by a monitoring gas flame operating on the verge of stability so that'a's soon as the contents of carbon dioxide inside the premises rise above a predetermined value, the flame dies out and a thermosensitive member subjected to the action of said flame cuts out the feed of fuel to the apparatus liable to produce carbon dioxide and opens a ventilating flap.
  • the present invention has for its object a safety arrangement adapted to produce automatically the ventilation of small premises such as a camper caravan within which one or more apparatus producing carbon dioxide and the like inert gases operate, and furthermore to stop operation of said apparatus in case of emergency.
  • the safety arrangement comprises an adjustable gas burner located within the caravan the adjustment of the burner being such as well known in the art that the flame may be under normal conditions just at the limit of breaking away and becomes extinguished when the contents of carbon dioxide or the like inert gases in the ambient atmosphere within the caravan reach a predetermined value said bumerbeing associated with a thermosensitive member subjected to the radiation of the burner flame and controlling simultaneously a valve inserted in the pipe feeding the gasproducing apparatus, a miniature switch producing a signal stopping other-apparatus and means opening a ventilating flap in the premises enclosing the apparatus.
  • the two operations to wit the ventilation and the stopping of the apparatus may be obtained by means of one or two thermosensitive members heated by the same pilot flame and of which one cuts off the admission of gases into the burner, while the other opens a ventilation flap and operates the miniature switch.
  • the arrangement for monitoring the atmosphere within the interior of the caravan indicated generally on the drawing by the letter 1 includes an auxiliary monitoring gas burner I located within the caravan and which is fed with primary air from within the caravan through an opening 2, said burner being adjusted as well known per se in a manner such that the flame 3 of said burner may under normal conditions be on the verge of instability that is when the contents of carbon dioxide in the ambient atmosphere within the caravan rise beyond a predetermined value, said flame breaks away and is extinguished.
  • Said flame 3 is adapted to heat the end 4 of a bulb of a thermosensitive member including an aneroid cap inserted in the casing 5.
  • the system including the burner 1, the bulb 4 of the thermosensitive member and the igniter 8 is housed in a chamber 10 protected by a grating against deflagration.
  • the casing 5 is provided with two ports 11 and 12 connected with the gas pipes I5 and 16 through corresponding apertures I la, 12a in a connecting box 14.
  • Pipe is connected with a gas supply source and pipe I6 is connected to the apparatus such as a cooking stove which produces the carbon dioxide or similar gas within the caravan which is desired to be monitored.
  • the whole arrangement is enclosed within a housing 18 which is adapted to be mounted at a convenient place within the caravan.
  • the burner I is supplied with combustible gas from pipre 15 within casin S.
  • he operation oft e arrangement IS as follows:
  • the flame 3 breaks off the nozzle of the burner I and dies out since the burner no longer receives the required amount of primary airthrough opening 2 to maintain combustion.
  • the bulb 4 being no longer subjected to the radiation of the flame 3 the aneroid cap enclosed within the casing 5 is deformed and its deformation closes off through the agency of well-known mechanical means the communication between the pipes 15 and I6 whereby the gas burning apparatus fed by the pipe 15 can no longer remain operative.
  • the miniature switch I3 which is actuated simultaneously with closing off of the communication between pipes I5 and I6 controls for instance the closing of a pipe not illustrated feeding fuel oil for example to a stove heating or similar apparatus.
  • the deformation of the aneroid cap contained within the casing 5 opens the clip 17 to which is secured the cord 19 controlling the opening ofa ventilation flap.
  • the latter may be associated with a conventional exhaust fan for force-ventilating the interior of the caravan of the type wherein cord 19, when released from clip 17 permits the flap to open and simultaneously turn on the exhaust fan.
  • the arrangement disclosed is of particular advantage for ensuring safety inside caravans carrying, within a confined space, cooking apparatus, illuminating and cooling apparatus and also heating apparatus without any exhaust being provided for the burnt gases.
  • the arrangement according to the invention ensures as a mater of fact an automatic stoppage of any defective apparatus of which the efflux may be dangerous and simultaneously it produces an automatic ventilation of the premises.
  • the chamber I0 protected against deflagration is essential for the incorporation of the improved arrangement disclosed with caravans since it often occurs that such caravans stand on sites infested by mosquitoes and generally the inhabitants of caravans destroy the latter by means of aerosol bombs projecting highly inflammable gases.
  • apparatus such as a cooking stove heated by combustion of a gaseous fuel and which produces carbon dioxide or similar inert and deleterious gas
  • thermosensitive member upon extinction of the monitoring flame, said switch being connected in a control circuit for other apparatus located within the caravan such as a heating stove.
  • thermosensitive member for opening said ventilation flap includes a clip in association with an operating cord for the flap, said clip serving to release the cord so as to open the flap when the monitoring flame is extinguished.
  • auxiliary monitoring gas burner includes an electrical lighter and a manually controlled piezoelectric generator for energizing said lighter.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Control Of Combustion (AREA)
  • Lighters Containing Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Ventilation (AREA)
US821781A 1968-06-28 1969-05-05 Arrangement for checking the condition of the air enclosed in small-sized premises such as caravans and ventilating same Expired - Lifetime US3581648A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR157119 1968-06-28

Publications (1)

Publication Number Publication Date
US3581648A true US3581648A (en) 1971-06-01

Family

ID=8651823

Family Applications (1)

Application Number Title Priority Date Filing Date
US821781A Expired - Lifetime US3581648A (en) 1968-06-28 1969-05-05 Arrangement for checking the condition of the air enclosed in small-sized premises such as caravans and ventilating same

Country Status (10)

Country Link
US (1) US3581648A (is")
BE (1) BE730020A (is")
BR (1) BR6910268D0 (is")
DE (1) DE1914991A1 (is")
ES (1) ES365832A1 (is")
FR (1) FR1584324A (is")
GB (1) GB1277092A (is")
NL (1) NL6909970A (is")
NO (1) NO125505B (is")
SE (1) SE357431B (is")

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100011495A1 (en) * 2007-02-22 2010-01-21 Dometic Gmbh Ventilation through service flap frames

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2500529C3 (de) * 1974-01-10 1982-04-15 Saunier Duval, S.A., Rueil-Malmaison Sicherheitsvorrichtung für Gas-Durchlauferhitzer
GB2165980A (en) * 1984-10-23 1986-04-23 Willey Robinson Ltd Safety device for gas supply
GB2169732B (en) * 1985-01-16 1988-06-02 Rinnai Kk Safety apparatus for equipment incorporating a flame failure safety circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619022A (en) * 1950-02-20 1952-11-25 Richard G Hergenrother Ventilating chimney
US2678092A (en) * 1950-03-17 1954-05-11 Gen Controls Co Fuel burner safety control system
US3074644A (en) * 1960-02-24 1963-01-22 Sun Oil Co Damper control system for process heaters
US3307613A (en) * 1965-09-03 1967-03-07 Honeywell Inc Control apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619022A (en) * 1950-02-20 1952-11-25 Richard G Hergenrother Ventilating chimney
US2678092A (en) * 1950-03-17 1954-05-11 Gen Controls Co Fuel burner safety control system
US3074644A (en) * 1960-02-24 1963-01-22 Sun Oil Co Damper control system for process heaters
US3307613A (en) * 1965-09-03 1967-03-07 Honeywell Inc Control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100011495A1 (en) * 2007-02-22 2010-01-21 Dometic Gmbh Ventilation through service flap frames

Also Published As

Publication number Publication date
NO125505B (is") 1972-09-18
DE1914991A1 (de) 1970-01-29
ES365832A1 (es) 1971-03-16
BE730020A (is") 1969-09-01
FR1584324A (is") 1969-12-19
SE357431B (is") 1973-06-25
GB1277092A (en) 1972-06-07
BR6910268D0 (pt) 1973-03-08
NL6909970A (is") 1969-12-30

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