US3676041A - Gas burner control apparatus for operating a piezoelectric ignition system in conjunction with the gas valves - Google Patents

Gas burner control apparatus for operating a piezoelectric ignition system in conjunction with the gas valves Download PDF

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Publication number
US3676041A
US3676041A US72638A US3676041DA US3676041A US 3676041 A US3676041 A US 3676041A US 72638 A US72638 A US 72638A US 3676041D A US3676041D A US 3676041DA US 3676041 A US3676041 A US 3676041A
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United States
Prior art keywords
handle
cam
support
gas
valve
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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
Application number
US72638A
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English (en)
Inventor
Gunter Mobus
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Vaillant GmbH
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Joh Vaillant GmbH and Co
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Filing date
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Application filed by Joh Vaillant GmbH and Co filed Critical Joh Vaillant GmbH and Co
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
    • H02N2/183—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using impacting bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/002—Igniters using electrically-produced sparks using piezoelectric elements
    • 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
    • F23Q9/12—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame
    • F23Q9/14—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame using electric means, e.g. by light-sensitive elements

Definitions

  • a valve housing includes a pilot valve and a main valve movable along a common axis to open and close the valves.
  • An operating mechanism for the valves includes a cam support and a cam post contacting a cam on one side of the support.
  • a handle is operatively connected to the support so that it can be rotated to a position at which the pilot valve is open. The burning of the pilot valve causes a latch to hold the support in the rotated position. Reverse rotation of the post, cams the rotationally latched support so as to open the main valve.
  • a handle is connected to rotate the post and also a ring gear. Axial displacement of the handle axially moves the gear to a position at which it engages a gear on a piezoelectric lighter, whereupon rotation of the two gears actuates the lighter.
  • the prior art includes a piezoelectric ignition system, comprising a piezoelectric element, connected to a spark gap, and a handle by which an impact member can be retracted against spring biasing and then released to achieve a spring urged rapid forward movement of said impact element for producing an impact on the piezoelectric element.
  • the handle is rotatable and the impact member is joined thereto in an unrotatable but axially slidable manner.
  • the impact member has a driver which rides on sawtooth curves, extending axially and being fixed relative to the housing.
  • the handle takes the form of a rotary handle which can be directly rotated by hand.
  • the prior art also includes gas-heated apparatus, for example gas water heaters, in which an ignition safety device is provided and the gas supply to a pilot burner is released by a rotary gas control having a pilot gas valve and a main gas valve coaxially disposed thereon.
  • a rotary gas control having a pilot gas valve and a main gas valve coaxially disposed thereon.
  • the pilot burner may be ignited and a thermoelectric ignition safety device thereby brought into operation. Further rotation of the rotary gas control enables the main gas valve to be opened.
  • known rotary gas controls of the kind heretofore described the displacement of the valve shank is controlled by a cam support which co-operates with a control member mounted on a rotary handle.
  • the cam support for opening the pilot gas 3,676,041 Patented July 11, 1972 valve is entrained by the control cam due to rotation of the handle and is retained against the action of a return spring by means of an interlocking mechanism, operated by a retaining element from a heat-sensitive apparatus.
  • the cam support is provided with a claw, having an inclined surface which, when the cam support is rotated, displaces a retaining member, mounted on a bolt lever, relative to a thermally-sensitive apparatus in the form of a thermoelectrically energized magnet and the bolt lever retains the cam support in the rotated position by engagement into the claw of a pin mounted on the bolt lever, when the retaining member is retained in position.
  • the main gas valve is opened by a further axial displacement of the rotationally locked cam support by virtue of the fact that the control member of the rotary handle slides on a cam of the cam support.
  • Apparatus of the kind heretofore described is therefore provided with a rotary handle for the rotary gas control by means of which the pilot gas valve and main gas valve are controlled.
  • An additional rotary handle would be required if such apparatus were to be provided with piezoelectric ignition means of the type previously described. This would not only impair the appearance of the apparatus, but would also render its operation more difficult since during the ignition operation one would be required to simultaneously operate two rotary handles in a defined, timed sequence.
  • a rotary gas control of the type previously mentioned it would be necessary for the rotary control to be held by one hand in the ignition position until the thermoelectric ignition safety device responds and the cam support of the rotary gas control is locked in place. With the other hand one would have to operate the rotary handle of the piezoelectric ignition device while the rotary handle of the gas control is held in the ignition position.
  • the ignition device is disposed axially parallel and adjacent to a rotary gas control;
  • the gas control is provided with coaxial plate valves which can be thrust open by means of a rotary handle via a control cam (or control cams);
  • the rotary handle on the gas valve is provided with serrations which engage with serrations of the rotary handle on the ignition device for producing an ignition pulse after opening the pilot valve.
  • the invention utilizes the fact that operation of a piezoelectric ignition device of the type of the above application is performed by a rotating motion so that operation of the piezoelectric ignition device can be derived from the rotating motion of the rotary handle of the rotary gas control.
  • the invention furthermore utilizes the fact that in the construction according to the application, the impact is triggered at a precisely defined angular position of the handle so that the ignition spark can be triggered exactly at the correct time after opening the pilot valve when the rotary gas control and the ignition device are coupled in the manner described hereinabove.
  • the rotating handle thereof and the ignition device handle can be constantly coupled if the aforementioned rotating handle requires rotation in only one direction. It is also possible for a free-wheeling clutch to be provided between the rotating handle of the rotary gas control and the piezoelectric ignition device.
  • a particularly simple construction is obtained by an arrangement in which the rotating handle can be axially depressed with the serrations being in engagement with each other only when the handle is so depressed. It is then possible for the rotary :gas control to be provided in known manner with a cam support which, for opening the pilot valve, is entrained by rotation of the rotating handle and through a control cam rotating therewith and is retained against the action of a return spring by interlocking means, operated from a heat-sensitive device by means of a retaining element, and that reverse rotation of the rotating handle is accompanied by a further axial displacement of the interlocked cam support, causing the main gas valve to open, namely in that the control member of the rotating handle slides on a cam track of the cam support.
  • the control member is mounted on a disc which is rotatably mounted in the housing, and a handle, provided with external serrations may be unrotatably disposed on a central pin but may be adapted to be axially slidable against the action of a compression spring.
  • FIG. 1 is a diagrammatic view of a vertical section through the rotary gas control
  • FIG. 2 shows, also in diagrammatic form, a section through the gas housing along the line C-D of FIG. 1 and with the thermoelectric magnet;
  • FIG. 3 shows the rotary gas control and the piezoelectric ignition device coupled thereto, also in diagrammatic form and as a horizontal section along the lines A-B of FIG. 1;
  • FIG. 4 shows in diagrammatic form the rotating handle of the gas control in the inoperative state
  • FIG. 5 shows the handle in the ignition position
  • FIG. 6 shows the handle in the operating position.
  • a spring-loaded pilot valve 2 and an equally springloaded main gas valve 3 are coaxially disposed in a .valve housing 1. They are opened successively by a valve operating mechanism.
  • This mechanism includes a valve shank 4 having a driver 4' which are axially displaced during the valve opening operation.
  • a pilot gas line 5 leading to pilot burner 33 branches off between the valves 2 and 3.
  • a cam follower 6 on the end of the valve shank 4 bears against a cam track 19' on a cam support 7.
  • Cam support 7 is mounted in a control housing 8 so as to be rotatable and axially slidable.
  • a rotating plate 9 is rotatably supported in the control housing 8 but is restrained against axial movement. It has a cam post 10 and a driver pin 11.
  • a rotating handle 12 has a sleeve 13 which receives driver pin 11.
  • Driver pin 11 has splines 11 which rotationally engage sleeve 13 while permitting axial movement between the two.
  • An inwardly flange 13' of the sleeve 13 contacts splines 11' to limit the outwardly axial movement of the handle 12 in response to the urging of compression spring 14.
  • the rotating handle 12 At its outer edge the rotating handle 12 has a ring gear 29.
  • the adjacent rotating handle 30 of the piezo electric ignition device 31 also has a ring gear 32.
  • the rotating handle 12 To put the burner into operation, the rotating handle 12 is depressed while in the zero position (FIG. 4) against the force exerted by the spring 14. This causes meshing of ring gears 29 and 32.
  • the handle 12 is then rotated from the zero position in a counterclockwise direction (against the force exerted by the helical spring 18) into the position I (FIG. 5) and held in that position. This results in the pilot gas valve 2 being raised from its seat so that pilot gas is discharged at the pilot burner head 33.
  • handle 12 also drives handle 30 through the gear drive 29, 32 to actuate the igniter 31 and produce an electric spark on the ignition electrode 34 to ignite the pilot flame 27.
  • the handle 12 is held in the ignition position I until the magnet 26 is sufiiciently energized, by the heating of the thermocouple 28, to retain the armature 25 and the lever 21 in the depressed position.
  • pin 23 is behind abutment 16 of claw 15 so that the cam support 7 is latched in the control position I (FIG. 5) while the helical spring 18 is stressed. Being so latched, the cam support 7 cannot return into its starting position even when the rotating handle is released. However, when the ignition flame 27 is extinguished and there is no current supplied to electromagnet 26 it is able to do so.
  • the rotating handle also can be moved from the O position (FIG. 4) into position I (FIG. 5) as often as is desired.
  • a retaining element for example, a bimetallic strip heated by the ignition flame 27 and released when the ignition flame is extinguished, may be employed instead of the magnet armature and the magnet 26.
  • the piezoelectric ignition device is of tubular construction. It is aflixed to the gas control housing 1, 8 by supports 38.
  • the piezoelectric ignition element 39 is thrust by a spring washer 40 against an anvil 41 which in turn bears on the base 42 0f the tube housing 43.
  • the striker pin 44 of the element extends through the spring washer 40.
  • the striker 45 is biased against the striker bolt by a spring 46.
  • the other end of the tubular housing 43 has sawtooth cams 47. These cams form inclined planes 48 and axially parallel edges 49 between the inclined planes 48. These sawtooth cams are disposed directly opposite to each other on the tubular housing.
  • a cam follower 52 (in the form of a transverse pin) is connected to striker rod 45' and rides on sawtooth cam 47.
  • the follower 52 is rotated with the handle while permitting the follower and rod 45' to move axially in casing 43.
  • Handle 30 while rotatable, is restrained against movement axially of the casing.
  • the follower 52 also is rotated causing it to move outwardly (to the right in FIG. 3) along the inclined cam surfaces 48.
  • the movement of the follower 52 results in a corresponding movement of striker 45 so that it retracts from pin 44 against the urging of spring 46.
  • the cam support 7 has a latching mechanism including a retaining claw 15 which, on the one hand, has an inclined surface by means of which, and when the cam support 7 is rotated, the magnet armature mounted on the latching lever 21. is thrust against the thermoelectrically energized magnet 26, the pin 23 of the latching lever retaining the cam support in the rotated position by engaging in the claw.
  • the retaining claw has an extension 16 having a straight external edge forming an abutment.
  • the pin 23 of the locking lever 21 strikes the external edge in the event of directly successive switching off and switching on again of the gas valves, when the magnet armature 25 is still retained. This not only prevents rotation of the cam support into the ignition position but also prevents the triggering of an ignition spark which could explosively ignite a combustible gas mixture which could still be present in the apparatus.
  • a gas burner control apparatus comprising a gas valve device for controlling the flow of gas to a pilot burner and independently the flow of gas to a main burner and a piezoelectric ignition device having a member which is rotated about a first axis to actuate the generation of electricity, the improvement comprising:
  • said gas valve device including a manually operable handle rotatable about a second axis for operating said valve device;
  • said gas valve device includes a housing, two gas valves within said housing and coaxially positioned, one of said valves being the pilot gas valve and the other being a main gas valve, actuating means for said valves including a rotatable cam device and means for connecting said cam device to said handle.
  • said gear on said member being positioned opposite and engaging said gear on said handle when the handle is in the second position with the two gears being axially spaced apart when the handle is in the first position.
  • said actuating means comprises a cam post contacting the cam track on one end and rotatably connected to said handle, means restraining said cam post against axial movement, latching means for holding said support in a rotated position and having one portion on said support and a second portion on the housing and releasably engageable with each other, said latching means being responsive to the presence of a pilot flame, said cam track on said one end having a stop abutment surface so that when said post is rotated in one direction it comes against said stop abutment surface and causes rotation of the support, said cam track on said one end having an inclined surface adjacent said stop abutment surface so that when said post is rotated in the opposite direction and said support is latched against rotation said post will move up said incline and move said support in axial direction from a first axial position to a second axial position, said actuating means opening said main gas valve when said support moves to said second axial position.
  • said actuating means includes a disc rotatably mounted on said housing and restrained against axial movement, said post being mounted on one axial side of said disc, said handle being at the other axial side of said disc, means connecting said disc and handle for common rotational movement while permitting the handle to move axially with respect to the disc.
  • said one portion of said latching means comprises a retaining claw having an inclined surface and an abutment
  • said second portion comprises a locking lever pivotally mounted at one end thereof and a cross pin at the other end of the locking lever, said lever being positioned for the inclined surface to contact the pin and push the pin and move the lever to a locking position at which the pin is behind the abutment when the support is moved to the rotated position by said post, thereby retaining the support in the rotated position so long as the pin remains latched behind the abutment;
  • thermoelectric means for retaining the lever in the position at which the pin is behind the abutment so long as the pilot flame is burning, said thermoelectric means having a part on said lever and a part positioned to be affected by the pilot burner flame;
  • said abutment having a distal surface to contact the pin and thereby block the movement of the claw toward latching position when the lever is in the locking position.
  • said one portion of said latching means comprises a retaining claw having an inclined surface and an abutment
  • said second portion comprises a locking lever pivotally mounted at one end thereof and a cross pin at the other end of the locking lever, said lever being positioned for the inclined surface to contact the pin and push the pin and move the lever to a locking position at which the pin is behind the abutment when the support is moved to the rotated position by said post, thereby retaining the support in the rotated position so long as the pin remains latched behind the abutment;
  • thermoelectric means for retaining the lever in the position at which the pin is behind the abutment so long as the pilot flame is burning, said thermoelectric means having a part on said lever and a part positioned to be affected by the pilot burner flame;
  • said abutment having a distal surface to contact the pin and thereby block the movement of the claw toward latching position when the lever is in the locking position.
  • pilot valve is opened to result in the flow of gas from the pilot burner upon the rotation of said cam device through a predetermined angle
  • said rotatable connecting means has a gearing ratio such that when the gears are engaged and said handle is rotated sufficiently to move said member through said given angle said cam device will have been rotated through said predetermined angle.
  • latching means for engaging and holding said cam device after it has been rotated through said predetermined angle and said pilot flame has heated a thermosensitive element forming a part of the latching means, said latching means also including a stop to prevent said cam device from being rotated through said given angle from its initial position when said thermosensitive element is heated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Control Of Combustion (AREA)
  • Mechanically-Actuated Valves (AREA)
US72638A 1969-09-26 1970-09-16 Gas burner control apparatus for operating a piezoelectric ignition system in conjunction with the gas valves Expired - Lifetime US3676041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT9151/69A AT304748B (de) 1969-09-26 1969-09-26 Piezoelektrische zuendeinrichtung

Publications (1)

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US3676041A true US3676041A (en) 1972-07-11

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ID=3611627

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US72638A Expired - Lifetime US3676041A (en) 1969-09-26 1970-09-16 Gas burner control apparatus for operating a piezoelectric ignition system in conjunction with the gas valves

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US (1) US3676041A (xx)
AT (1) AT304748B (xx)
BE (1) BE755716A (xx)
DE (1) DE2022199B2 (xx)
DK (1) DK133354B (xx)
ES (1) ES382609A2 (xx)
FR (1) FR2102972A6 (xx)
GB (1) GB1258029A (xx)
NL (1) NL7012414A (xx)
SU (1) SU416968A3 (xx)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3764181A (en) * 1972-02-01 1973-10-09 Vaillant Joh Kg Thermoelectric ignition safety device
US3770363A (en) * 1971-02-03 1973-11-06 Vaillant Joh Kg Rotary gas control with a thermoelectric ignition safety device and piezoelectric igniter
US3813207A (en) * 1973-01-22 1974-05-28 Teledyne Inc Gas fired patio heater with a manual igniter
US4110065A (en) * 1976-01-14 1978-08-29 Aero-Spec Products Co., Ltd. Cock apparatus of automatic ignition type for gas appliance
US4651711A (en) * 1985-08-14 1987-03-24 Scheu Manufacturing Company Forced air heater
US4870314A (en) * 1987-11-23 1989-09-26 The Coleman Company, Inc. Cam-actuated piezoelectric ignition device for gas appliance
US6517342B2 (en) * 2000-01-19 2003-02-11 Gastec N.V. Device for igniting fuel
DE102006013422A1 (de) * 2006-03-23 2007-09-27 Robert Bosch Gmbh Zündvorrichtung
US20100304315A1 (en) * 2009-05-29 2010-12-02 Gulkanat Bektas C Combination Safety Valve and Ignition Trigger For Gas Burners
CN112344368A (zh) * 2020-11-21 2021-02-09 泰州龙旭机电科技有限公司 脉冲点火装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1030286B (it) * 1975-03-06 1979-03-30 Elpinvest Sa Dispositivo di accensione per apparecchi a gas, particolarmente lampa de
US4420066A (en) * 1981-09-10 1983-12-13 General Signal Corporation Cam lock slack adjuster
FR2543370B1 (fr) * 1983-03-25 1986-03-07 Commissariat Energie Atomique Paratonnerre a dispositif piezo-electrique d'amorcage de l'effet corona.
IT1251316B (it) * 1990-09-20 1995-05-08 Vaillant Joh Gmbh & Co Interruttore del gas per un apparecchio riscaldato a gas

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770363A (en) * 1971-02-03 1973-11-06 Vaillant Joh Kg Rotary gas control with a thermoelectric ignition safety device and piezoelectric igniter
US3764181A (en) * 1972-02-01 1973-10-09 Vaillant Joh Kg Thermoelectric ignition safety device
US3813207A (en) * 1973-01-22 1974-05-28 Teledyne Inc Gas fired patio heater with a manual igniter
US4110065A (en) * 1976-01-14 1978-08-29 Aero-Spec Products Co., Ltd. Cock apparatus of automatic ignition type for gas appliance
US4651711A (en) * 1985-08-14 1987-03-24 Scheu Manufacturing Company Forced air heater
US4870314A (en) * 1987-11-23 1989-09-26 The Coleman Company, Inc. Cam-actuated piezoelectric ignition device for gas appliance
US6517342B2 (en) * 2000-01-19 2003-02-11 Gastec N.V. Device for igniting fuel
DE102006013422A1 (de) * 2006-03-23 2007-09-27 Robert Bosch Gmbh Zündvorrichtung
DE102006013422B4 (de) * 2006-03-23 2008-07-24 Robert Bosch Gmbh Zündvorrichtung
US20100304315A1 (en) * 2009-05-29 2010-12-02 Gulkanat Bektas C Combination Safety Valve and Ignition Trigger For Gas Burners
WO2010138780A3 (en) * 2009-05-29 2011-01-20 Premark Feg L.L.C. Combination safety valve and ignition trigger for gas burners
CN112344368A (zh) * 2020-11-21 2021-02-09 泰州龙旭机电科技有限公司 脉冲点火装置
CN112344368B (zh) * 2020-11-21 2022-06-21 泰州龙旭机电科技有限公司 脉冲点火装置

Also Published As

Publication number Publication date
NL7012414A (xx) 1971-03-30
AT304748B (de) 1972-12-15
DK133354C (xx) 1976-09-27
SU416968A3 (ru) 1974-02-25
GB1258029A (xx) 1971-12-22
BE755716A (fr) 1971-02-15
DE2022199B2 (de) 1972-12-14
DE2022199A1 (de) 1971-10-28
ES382609A2 (es) 1974-06-16
DK133354B (da) 1976-05-03
FR2102972A6 (xx) 1972-04-07

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