US3597138A - Fuel-burning apparatus - Google Patents
Fuel-burning apparatus Download PDFInfo
- Publication number
- US3597138A US3597138A US25439A US3597138DA US3597138A US 3597138 A US3597138 A US 3597138A US 25439 A US25439 A US 25439A US 3597138D A US3597138D A US 3597138DA US 3597138 A US3597138 A US 3597138A
- Authority
- US
- United States
- Prior art keywords
- pilot
- valve
- main
- thermocouple
- burner
- 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
Links
Images
Classifications
-
- 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
- F23N5/107—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using mechanical means, e.g. safety valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/1407—Combustion failure responsive fuel safety cut-off for burners
- Y10T137/1516—Thermo-electric
Definitions
- the invention includes an auxiliary pilot valve [54] FUELBURNING APPARATUS for use in a household gas heater control.
- a reduced pilot light is 137/66 produced by the auxiliary flow.
- the reduced pilot light is small [5l] Int.C
- This invention relates to controls for fuel burning apparatus and, more particularly, to a gas control for an automatic household heater or the like.
- the safety lock By the use of the safety lock, the user is prevented from turning on the main burner after the pilot has gone out. Further, after the safety lock has released, the main burner cannot receive gas through the safety magnet valve until the pilot has been relighted in the conventional way.
- the main or expanded pilot when the main or expanded pilot is on, it heats a thermocouple which keeps a safety magnet valve open. When the safety valve closes, all gas to the control is shut off. Thus, the reduced pilot flame is adjusted to such a small size that the thermocouple cools from the temperature created when it is heated by the larger normal main pilot flame. When the thermocouple cools, the magnet receives less electrical current; and the safety valve closes off all gas. Thus, gas to all three: the main burner valve, the expanded normal pilot valve, and the reduced flow pilot valve is shut off automatically and simultaneouslyA
- the control knob may be operated to reduce the main pilot flow without the safety lock latching and then immediately to full on. Then, the normal and expanded pilot flame will ignite gas entering the main burner.
- FIG. 1 apparatus of the invention is indicated at l0 including valve body l1.
- Body 1l contains a gas cock 12.
- Gas cock l2 has a slot 13 therein which can be turned into alignment with an auxiliary pilot passage 14 and both passage 14 and main pilot passage 15. Thus, gas can enter passage 14 and pass through a needle valve 16 back to passage 15.
- Gas cock 12 has a vertical projection 18 which fits in a disc 19 having a lug 43. Disc 19 is fixed to a shaft 20. A knob 21 is fixed to shaft 20 by a screw 22. Knob 21 has a projection 23. Body 1l has a projection 24 fixed thereto. Body 11 also has a projection 25 fixed thereto. Gas cock 12 has an additional projection 26.
- the said patent discloses considerable structures which are disclosed herein.
- the structures shown in FIGS. 1 and 2 may, thus, be identical to those shown in the said patent in certain respects.
- all of the structures shown in FIGS. 1 and 2 may be identical to those disclosed in the said patent except projection 23, knob 21, projections 24, 25, 26, passage 14, passage 17, and needle valve 16.
- None of the structures shown in body Il in FIG. l in the lower left-hand portion to the left of gas cock 12 is shown in the said patent except passage 15 and connection 27 therefrom to a pilot burner 28.
- Projections 23, 24, and 25 are not disclosed in the said patent.
- Projection 26 is in a different angular position around the symmetrical and vertical axis of the gas cock 12 than a similar projection 17 shown in the said patent.
- Projection 26 is in the shape of an arcuate ramp. A lever 29 rides on this ramp. During operation, it snaps downwardly where projection 26 terminates abruptly at the level of gas cock 12 as indicated at 30. Projection 26 is positioned so that lever 29 will drop down to the elevation 30 when the position of slot surface 3l shown in FIG. 2 lies in a position between the walls of the passages, for example, at an angle A from the axis of cylindrical passage l5.
- Valve body 11 has an inlet 32, a main burner outlet 33, and a pilot outlet. Outlet 33 is connected to a main burner 34.
- a thermocouple 35 is positioned adjacent pilot 28. Thermocouple 35 supplies electric current to magnet windingv 36 which has a core 37. Core 37 holds a magnetic armature 38.
- a shaft is fixed to armature 38.
- a valve 40 is fixed to shaft 39. Shaft 39 has a shoulder 4l against which lever 29 bears.
- Lever 29 is biased against slot 41 by a spring 42.
- Disc 19 has lug 43 as explained previously. Lug 43 bears against lever 29 when knob 21 is turned to an appropriate position, and knob 21 is further pressed downwardly as viewed in FIG. 1. Downward movement of rod 20 is resisted by a spring 44 between disc 19 and gas cock 12.
- gas cock l2 has a passage 45 which will allow gas, if entering from valve 40 into gas cock l2 to pass through outlet 33 when knob 2l is turned to the left as viewed from the top of knob 21.
- projection 23 engages projection 24 in the off position.
- projection 23 engages projection 25.
- both burners 34 and 28 will be cold.
- Thermocouple 35 will thus be cold.
- Valve 40 will thus be closed because insufficient current will be provided to magnet 36 to hold armature 38 to core 37. No gas can be supplied to either burners 34 and 28 before valve 40 opens.
- Valve 40 cannot be opened except by turning knob 21 90 to the left as viewed from the top of knob 21 and pushing knob 21 downwardly. This will cause lug 43 to engage the free end of lever 29. Movement of lever 29 downwardly will lower shaft 39 by engagement thereof with shoulder 41. Pilot 28 can thus be lit. Knob 21 must be held down a period of time sufficient after pilot 28 has been lit for thermocouple 3S to be heated so that core 37 will hold armature 38 against the force of spring 46.
- main burner 34 may be turned on simply by rotating knob 21 to the left, as viewed from the top of knob 21, until projection 23 engages projection 25. Opening 45 will not lie in alignment with outlet 33.
- the pilot will expand to supply sufficient gas to ignite the main pilot burner and the main burner.
- the pilot light may heat thermocouple 35 sufficiently to maintain the safety valve 38 open if the full and/or expanded pilot flow has not been extinguished by gas cock l2. ln this case, operation at expanded pilot or full on positions is possible at any subsequent time.
- the main burner 34 is cut completely off but the safety valve 40 is not latched at angle A and the condition with passage 15 cut off is allowed to persist for 2 or 3 minutes, the gas supplied through passage 14 will be insufficient to maintain thermocouple 35 at a temperature to keep safety valve 40 open.
- safety valve 40 closes, all gas to the apparatus will be cut off.
- the pilot may then be lit by conventional procedures, as described previously.
- This invention is applicable as shown with a single pilot burner 28. However, the invention may also be practiced by the use of one pilot burner for each of the passages 14 and 1S.
- amain burner a pilot burner; a thermocouple adjacent said pilot burner; a main valve to admit fuel to said main burner; a safety valve to close off said main valve; an electromagnet responsive to the output of said thermocouple for maintaining said safety valve open when said thermocouple reaches a predetermined temperature, a member to move said main valve; a main pilot valve, said main pilot valve being movable to an open position when said member is either in a pilot position or in a full on position, said main pilot valve being movable to a closed position when said member is in an intermediate position, said main pilot valve being connected with said pilot burner; an auxiliary pilot valve; and means connecting said auxiliary pilot valve with said pilot burner, said safety valve, when closed, also being adapted to close off all fuel to all of said main and pilot valves, said connecting means having an orifice therein sufficiently small in size to reduce the size of the pilot flame produced when said member is in said intermediate position, said auxiliary pilot being limited to such an extent as to sustain itself, said reduced pilot flame, however, being so small
- connection means includes a flow restriction for adjusting the amount of fuel which can pass through said orifice.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2543970A | 1970-04-03 | 1970-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3597138A true US3597138A (en) | 1971-08-03 |
Family
ID=21826080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US25439A Expired - Lifetime US3597138A (en) | 1970-04-03 | 1970-04-03 | Fuel-burning apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US3597138A (es) |
ES (1) | ES389892A1 (es) |
GB (1) | GB1291669A (es) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0046843A1 (de) * | 1980-08-16 | 1982-03-10 | Robert Bosch Gmbh | Zündsicherungsventil für gas- oder ölbeheizte Geräte |
US4613300A (en) * | 1984-10-09 | 1986-09-23 | Simpson Kenneth N | Burner safety system |
US4971095A (en) * | 1986-12-05 | 1990-11-20 | Robertshaw Controls Company | Fuel control valve construction, parts therefor and methods of making the same |
AU634621B2 (en) * | 1986-12-05 | 1993-02-25 | Robertshaw Controls Company | Fuel control valve construction, and method of making the same |
US5622200A (en) * | 1994-04-14 | 1997-04-22 | Mertik Maxitrol Gmbh & Co., Kg | Thermo-electric safety igniter with reignition lock |
US6082388A (en) * | 1997-03-19 | 2000-07-04 | Sit La Precisa S.R.L. | Control device for gas burners |
US20020070105A1 (en) * | 2000-12-12 | 2002-06-13 | Freeman Wilks | Apparatus for and method of heating fluid and distilling fluid |
US6522235B2 (en) * | 2001-01-10 | 2003-02-18 | Yu Jen Cheng | Switch structure for a heating device |
US6617954B2 (en) | 2001-03-02 | 2003-09-09 | Robertshaw Controls Company | Tamper resistant temperature controller for a gas-fired heating device |
US6769447B2 (en) * | 1999-08-09 | 2004-08-03 | Advanced Products Pty Ltd | Gas control assembly |
US20060068349A1 (en) * | 2003-02-13 | 2006-03-30 | Barbara Happe | Method and arrangement for igniting a gas flow |
US20060109887A1 (en) * | 2004-11-22 | 2006-05-25 | Robertshaw Controls Company | Bi-directional tamper resistant temperature dial |
US20060108431A1 (en) * | 2004-11-22 | 2006-05-25 | Robertshaw Controls Company | Tamper resistant temperature dial and associated method of use |
US20060237435A1 (en) * | 2005-03-30 | 2006-10-26 | Nguyen Can T | Tamper resistant temperature dial utilizing deflection pins |
US20090020019A1 (en) * | 2007-06-21 | 2009-01-22 | Potdar Medhavin P | Food cooking device with combination valve |
US20100015559A1 (en) * | 2008-07-18 | 2010-01-21 | Invensys Controls Australia Pty Ltd. | Micro-Pilot For Gas Appliance |
US20130217245A1 (en) * | 2010-06-30 | 2013-08-22 | Sabaf S.P.A. | Electrical connection for connecting a thermocouple to the magnet assembly of a safety cock for gas supply |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2953198A (en) * | 1956-08-23 | 1960-09-20 | Baso Inc | Fuel control apparatus |
-
1970
- 1970-04-03 US US25439A patent/US3597138A/en not_active Expired - Lifetime
-
1971
- 1971-04-03 ES ES389892A patent/ES389892A1/es not_active Expired
- 1971-04-19 GB GB25846/71A patent/GB1291669A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2953198A (en) * | 1956-08-23 | 1960-09-20 | Baso Inc | Fuel control apparatus |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0046843A1 (de) * | 1980-08-16 | 1982-03-10 | Robert Bosch Gmbh | Zündsicherungsventil für gas- oder ölbeheizte Geräte |
US4613300A (en) * | 1984-10-09 | 1986-09-23 | Simpson Kenneth N | Burner safety system |
US4971095A (en) * | 1986-12-05 | 1990-11-20 | Robertshaw Controls Company | Fuel control valve construction, parts therefor and methods of making the same |
AU634621B2 (en) * | 1986-12-05 | 1993-02-25 | Robertshaw Controls Company | Fuel control valve construction, and method of making the same |
US5622200A (en) * | 1994-04-14 | 1997-04-22 | Mertik Maxitrol Gmbh & Co., Kg | Thermo-electric safety igniter with reignition lock |
US6082388A (en) * | 1997-03-19 | 2000-07-04 | Sit La Precisa S.R.L. | Control device for gas burners |
US6769447B2 (en) * | 1999-08-09 | 2004-08-03 | Advanced Products Pty Ltd | Gas control assembly |
US20020070105A1 (en) * | 2000-12-12 | 2002-06-13 | Freeman Wilks | Apparatus for and method of heating fluid and distilling fluid |
US20030155226A9 (en) * | 2000-12-12 | 2003-08-21 | Freeman Wilks | Apparatus for and method of heating fluid and distilling fluid |
US6846388B2 (en) * | 2000-12-12 | 2005-01-25 | Freeman Wilks | Apparatus for and method of heating fluid and distilling fluid |
US6522235B2 (en) * | 2001-01-10 | 2003-02-18 | Yu Jen Cheng | Switch structure for a heating device |
US6617954B2 (en) | 2001-03-02 | 2003-09-09 | Robertshaw Controls Company | Tamper resistant temperature controller for a gas-fired heating device |
US20060068349A1 (en) * | 2003-02-13 | 2006-03-30 | Barbara Happe | Method and arrangement for igniting a gas flow |
US8668490B2 (en) * | 2003-02-13 | 2014-03-11 | Mertik Maxitrol Gmbh & Co. Kg | Method and arrangement for igniting a gas flow |
US20060109887A1 (en) * | 2004-11-22 | 2006-05-25 | Robertshaw Controls Company | Bi-directional tamper resistant temperature dial |
US20060108431A1 (en) * | 2004-11-22 | 2006-05-25 | Robertshaw Controls Company | Tamper resistant temperature dial and associated method of use |
US7151240B2 (en) | 2004-11-22 | 2006-12-19 | Robertshaw Controls Company | Bi-directional tamper resistant temperature dial |
US7441713B2 (en) | 2004-11-22 | 2008-10-28 | Robertshaw Controls Company | Tamper resistant temperature dial and associated method of use |
US20060237435A1 (en) * | 2005-03-30 | 2006-10-26 | Nguyen Can T | Tamper resistant temperature dial utilizing deflection pins |
US7145107B2 (en) | 2005-03-30 | 2006-12-05 | Robertshaw Controls Company | Tamper resistant temperature dial utilizing deflection pins |
US20090020019A1 (en) * | 2007-06-21 | 2009-01-22 | Potdar Medhavin P | Food cooking device with combination valve |
US20100015559A1 (en) * | 2008-07-18 | 2010-01-21 | Invensys Controls Australia Pty Ltd. | Micro-Pilot For Gas Appliance |
US8454352B2 (en) * | 2008-07-18 | 2013-06-04 | Invensys Controls Australia Pty Ltd. | Micro-pilot for gas appliance |
US20130217245A1 (en) * | 2010-06-30 | 2013-08-22 | Sabaf S.P.A. | Electrical connection for connecting a thermocouple to the magnet assembly of a safety cock for gas supply |
US9285119B2 (en) * | 2010-06-30 | 2016-03-15 | Sabaf S.P.A. | Electrical connection for connecting a thermocouple to the magnet assembly of a safety cock for gas supply |
Also Published As
Publication number | Publication date |
---|---|
ES389892A1 (es) | 1973-06-01 |
GB1291669A (en) | 1972-10-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ITT CORPORATION Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606 Effective date: 19831122 |