EP0486913A2 - Thermostat avec dispositif de sécurité - Google Patents

Thermostat avec dispositif de sécurité Download PDF

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Publication number
EP0486913A2
EP0486913A2 EP91119154A EP91119154A EP0486913A2 EP 0486913 A2 EP0486913 A2 EP 0486913A2 EP 91119154 A EP91119154 A EP 91119154A EP 91119154 A EP91119154 A EP 91119154A EP 0486913 A2 EP0486913 A2 EP 0486913A2
Authority
EP
European Patent Office
Prior art keywords
lever
accordance
improved thermostat
thermostat
slot
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.)
Withdrawn
Application number
EP91119154A
Other languages
German (de)
English (en)
Other versions
EP0486913A3 (en
Inventor
Mario Zucco
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.)
IMIT SpA
Original Assignee
IMIT SpA
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 IMIT SpA filed Critical IMIT SpA
Publication of EP0486913A2 publication Critical patent/EP0486913A2/fr
Publication of EP0486913A3 publication Critical patent/EP0486913A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/06—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms
    • F23N5/067—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using bellows; using diaphragms using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/24—Valve details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples

Definitions

  • the present invention relates to an improved thermostat with safety device.
  • the present invention relates to an improved thermostat with safety device especially suited for use in kitchen stove ovens.
  • said heat regulation instrument In gas supplied ovens said heat regulation instrument generally comprises a valve which simultaneously regulates gas delivery and performs heat regulation.
  • Said valve is generally made of brass and comprises the ducts for passage of the combustible fluid, a magnetic safety valve and related excitation means.
  • the magnetic safety valve is arranged in accordance with an angular development in relation to the associated excitation means.
  • the activation member designed to intervene on the excitation means is applied to the front of the valve and thus acts on the excitation means in a nonperpendicular manner.
  • This relative arrangement of the various members making up the valve provides limited operative sensitivity of the unit.
  • the object of the present invention is to obviate the above mentioned shortcomings.
  • the object of the present invention is to provide an improved thermostat usable preferably on especially compact gas cooking stoves for even fuel flow.
  • Another object of the present invention is to provide a thermostat capable of giving a high level of reliability and resistance in time and also easy and economical to manufacture.
  • the improved thermostat of the present invention basically characterized in that the magnetic unit and associated excitation means are arranged coaxially with each other and the activation member is a metal lever whose longitudinal axis is perpendicular to that of the excitation means.
  • the improved thermostat of the present invention comprises a container consisting of a main body, a front and a cap coupled to the body after interposition of one or more seals.
  • a lever housed in said front permits activation of said excitation means in accordance with a perpendicular incidence.
  • the improved thermostat of the present invention comprises a container (10) consisting of a hollow body (12) with projecting front (14) preferably made of brass and a cap (16).
  • the cap (16) is preferably provided of aluminium and is coupled with the hollow body (12) by means of general use screws or equivalent systems with interposed seals (18) and (20) housed in corresponding seats made in the front side of said cap (16).
  • the cap (16) is provided with a gas duct (58) and on the opposite side with a circular seat (60) with horizontal development and in which is inserted and fixed the magnetic valve (22).
  • the hollow body (12) is provided with a circular seat (62) in which is located the excitation means of the magnetic valve.
  • the magnet (22) and the corresponding excitation means are arranged aligned and coaxial with each other.
  • the excitation means comprises a cap (26) provided with a through axial hole and a rod (28) or pin designed to act on the magnet (22) inserted in said hole and sliding therein.
  • a toric seal ring (30) ensures sealing of the cap (26) in the seat (62) of the body (12).
  • a second seal (32) ensures seal between the rod (28) and the cap (26).
  • the seal (33) is arranged in a seat made in the hole of the rod opposite the part from which emerges the rod (28) at the rear.
  • the end of the rod (28) opposite that which makes contact with the magnetic valve (22) emerges from the cap (26) and is arranged in a chamber (34) delimited by the vertical wall of the hollow body (12) and the cap (26).
  • a metal lever (36) is fixed at one end to the wall of the hollow body (12), is inserted in the sleeve (38) and has its opposite end free and arranged in the chamber (34).
  • the free end of the lever (36) is aligned with the end of the pin (28) and their longitudinal axes are perpendicular to each other.
  • the lever (36) achieved preferably of metal by pressing and subjected to bending and drilling operations has a substantially U shape.
  • Said lever (36) has an intermediate portion (44) and two lateral end portions (42) and (46) arranged on different planes, said portions being connected together by means of oblique intermediate sections (44') and (44'').
  • one of the end portions (42) is made a rectangular hole (48) in which is arranged during assembly a tongue (50) fixed on the wall of the hollow body (12) opposite the front (14).
  • a slot (52) On the portion (44) of the lever (36) is provided a slot (52).
  • Said slot (52) has an enlargement (54) opposite the intermediate section (44).
  • Said enlargement (54) extends in such a manner as to partially occupy the intermediate portion (44') also.
  • FIG. 4 shows the lever (36) in its development before the bend made in it to provide its substantially U form.
  • a hemispherical impression (56).
  • the function of said impression (56) is to create a boss or bosses against which acts the pin (40) for operation of the lever.
  • the free end portion (46) of the lever (36) comes in contact with and pushes the rod (28) which, consequently, acts on the magnetic valve 22.
  • the thermostat as a whole is particularly compact and has in particular limited size, especially as concerns the front, while the lever (36) which controls excitation of the magnet operates on the associated rod (28) perpendicularly and directly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Cookers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Control Of Combustion (AREA)
EP19910119154 1990-11-20 1991-11-11 Improved thermostat with safety device Withdrawn EP0486913A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT22142U IT220289Z2 (it) 1990-11-20 1990-11-20 Termostato perfezionato con sicurezza specie per forni di cucine a gas
IT2214290 1990-11-21

Publications (2)

Publication Number Publication Date
EP0486913A2 true EP0486913A2 (fr) 1992-05-27
EP0486913A3 EP0486913A3 (en) 1992-12-23

Family

ID=11192119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910119154 Withdrawn EP0486913A3 (en) 1990-11-20 1991-11-11 Improved thermostat with safety device

Country Status (2)

Country Link
EP (1) EP0486913A3 (fr)
IT (1) IT220289Z2 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1283265A (fr) * 1960-12-20 1962-02-02 Briffault Sa Perfectionnement aux robinets pour appareil à gaz
FR1337825A (fr) * 1962-07-27 1963-09-20 Landis & Gyr Sa Régulateur de température à coupe-circuit d'allumage pour appareils chauffés au gaz
FR1519739A (fr) * 1967-02-20 1968-04-05 Theobald Ets A Dispositif de sécurité à couple thermo-électrique pour brûleurs à gaz
US3462079A (en) * 1967-10-17 1969-08-19 Robertshaw Controls Co Lever and fulcrum pin arrangement for a control device or the like
EP0027898A2 (fr) * 1979-10-13 1981-05-06 Paul Isphording Metallwerke GmbH. & Co. KG Dispositif pour le réglage de l'alimentation en gaz
US4354633A (en) * 1981-08-07 1982-10-19 Essex Group, Inc. Manual main shutoff valve for a gas burner combination control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1283265A (fr) * 1960-12-20 1962-02-02 Briffault Sa Perfectionnement aux robinets pour appareil à gaz
FR1337825A (fr) * 1962-07-27 1963-09-20 Landis & Gyr Sa Régulateur de température à coupe-circuit d'allumage pour appareils chauffés au gaz
FR1519739A (fr) * 1967-02-20 1968-04-05 Theobald Ets A Dispositif de sécurité à couple thermo-électrique pour brûleurs à gaz
US3462079A (en) * 1967-10-17 1969-08-19 Robertshaw Controls Co Lever and fulcrum pin arrangement for a control device or the like
EP0027898A2 (fr) * 1979-10-13 1981-05-06 Paul Isphording Metallwerke GmbH. & Co. KG Dispositif pour le réglage de l'alimentation en gaz
US4354633A (en) * 1981-08-07 1982-10-19 Essex Group, Inc. Manual main shutoff valve for a gas burner combination control

Also Published As

Publication number Publication date
IT220289Z2 (it) 1993-09-15
EP0486913A3 (en) 1992-12-23
IT9022142U1 (it) 1992-05-20
IT9022142V0 (it) 1990-11-20

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