US1844959A - Btpxtiple bttbneb contbol - Google Patents

Description

Patented Feb. 1932 UNITED -s'r-A'res;

PATENT ermee G`.l0l`B.G-I1E.AHU'LSE,l OF NEW' HAVENTACONNECTICT, ASSIGNOR T0 THE'SILICA. GEL COR- PORATION, '0F BALTIMORE, MARYLAND, A CORPORATION 0F MARYLAND MULTIPLE BURNER CONTRGL Application led January 25, 1929.. Serial No. 335,112. A

This invention relates to a burnercontrol system and more particularly to a method ofand apparatus for controlling fluid fuel burners. i

It is ageneral object of the present invention to provide novel and-improved apparatus ,'ffor and a method of controlling fluid fuel burners. I

One,ofthe features of the invention comprises an arrangementV ofiburners, a fuel supply, and ignition means so that one or a plurality of burners canbe made \tolfunction intermittently or successively andintermitr-l tently. Y Another feature'of the invention comprises the arrangement of a main burner, a pilot 5m Figure 2 is a plan view of the cam disk. s 24, 25, that each heats its` own coil when burn- 1W.

burner, and an ignition device so that upon Jlihe start of a'supply of fuel to the pilot burner, the ignition device will operate to igniteA the fuel at.the pilot burner, together with means responsive to the burning of the fuel 'at the pilot burner for supplying fuel toitlie main burner to be ignited bythe pilot light.

A further feature -of the invention comprises a system for automatically and successively lightin a plurality of main burners, each to burn Vor a predetermined period, to-

gether with means for shutting oii' the burners, their pilots, andall ignition means so that they can be turned on simultaneously to re-stablish any portion of an incomplete 'burning period of any burnerwhich was'extinguished by turning off the various agencies recited above.

vOther and further vfeatures and objects-of the invention will be more apparent to those skilled in the art upon a consideration of the accompanying drawings and following specication whereinis disclosed a single exemplary .embodiment of the invention with the understanding, however, that such variations and changes may be made therein as fall within the scope of the appended claims without departing from the spirit of the invention.

In said drawings:

Figure 1 is a schematic and diagrammatic representation of the system and parts for carrying out the above mentioned invention; and` In `various commercial installations, both-1 stationary and portable, it is often desirableto supply heat over certain fixed periods of time-and to have these periods repeat themselves atrdetinite intervals or controlled intervals. several units or devices and to heatthem intermittently and successively. The present Sometimes it is desirable to heat' invention provides apparatus for carrying ence in description, it will be seen that a. pipel 10 leads from a source' of iud fuel (not shown) preferably under pressure. Any conventional form ofpressure regulator l1 serves to reduce the pressure tothat suitable for the burners. The fuel flows from theV pressure regulator through a valve 12'and into a 11197.11#A

ifold 13. The main burners are shown at 14 and 15 respectively connected by means of tlle pipes 16 and 17 with the manifold 13.

Each pipe 16, 17, is provided with a valve 1 18, 19, normally held closed by'any suitable means and adapted to be opened by a pressure responsivev device 20, 21, which may be inthe formof a corrugated metal bellows.

` Each such device is connected by apipe 22, 23, to a coil 24, 25, which contains a thermally responsive liquid. While it is intended that the burner valves 18, 19, may be operated in any manner, for convenience they have been shown here as subject totemperaturev control. Under normal temperature conditions the fluid in the coils 24, 25", issuiciently contracted'to allow the valves to remain closed, but upon any major rise in temperature of the coils 24, 25, the :duid expands andthe valves are opened thereby. Y

Each main burner is provided with `a. pilot burner 26,27,-y respectively, and these burners are so positioned inrespe'ct the coils c fixed for the purpose land inc ing. These coils, however, are so mounted as to be out of the range of heating of the main burner. v

Each pilot burner is supplied with fuel by means of a pipe 28, 29, respectively, leading from the manifold 13 and passing through the valves 30, 31, respectively. When either of the valves 30, 3l, is opened, its corre be lighted. Each sponding pilot burner can pilot burner has located adjacent it the spark gap 32, 33, respectively, connected to suitable ignition means so that a spark can pass across the gap to ignite the fuel issuing from' the burner.

For purposes of convenience, two burners have been shown in the present system, and they are arbitrarily shown las adapted to burn alternatel each one-quarter of the time leaving half of the time with neither burner ignited. The control of the time regulation is effected by means of a suitable motor 38, here shown as driven by the expansion of the fuel which is supplied to the motor through the pipe 34 from the manifold 13.`

This motor may well be of the gas meter type or some similar type adapted to rotate the shaft 35 very slowly through suitable gearing'or otherwise as desired. This4 shaft carries a cam disk` 36 at its upper end which is provided on its undersurface with a circumferential cam37 of substantiallyl()o arcuate extent (this 90 is an arbitrary figure ofthis explanation) This cam 37 is adapted to engage the operating member of the valve 30 and 4of the valve y31 alternately soas to hold each valve open throughout 90 of rotation of the shaft and to leave two intervals of 90 of rotation of the shaft when both valves are closed.

It will thusbe seen that this ,motor effects the control and operation of the burners p engages and opens the for whenE the cam 37 valve-30, the fuel lfrom the pilot burner 26 will be ignited, and the heat responsive -coil 24 will function to openthe valve 18 so that the fuel from the main burner 14 will beig- -its pilot light and will' continue nited from to burn until thecam 27lallows the valve 30 to close Shortly after this, the contraction of the fluid in thecoil 24, due to the absence of the .pilot light, will allow the bellows 20 to close the valve 18 and shut olf the main burner 14 `fter a period of substantially 90 of rotation of the gam disk 36, a similar successionl of vevents will take place. at the other main burner and itsappurtenances. Y

The ignition system is vof the electric type udes mary winding of which is supplied with current from the battery41 through the interru ter 42 in the customary manner. The secon n ary winding of the induction coil is connected by means of wires 43 tothe spark gaps 32 and which, it will be seen, are connected scribed, a very small control the induction coil 40, the pri-l in a series for simultaneous operation. The circuit of the primary winding of the induction coil is from the ground at 44 at a suitable place on the control motor through the cam disk 36, one of the cams 45 on its upper surface, the contact spring 46, wire 47, battery 4l, primary winding, vibrator 42, wire 48, switch 49 to groundagain at 50.

In Figure 2 is shown a plan view of the cam disk 36 which carries the cams 45 and 45 on its upper surface, each of substantially 90O extent and 90 apart. These cams are so positioned that their phase relation to the cam 37; the valves 30, 31; and the spring 46 is such that contact is made at the spring 46 simultaneously with the opening of either valve 30 or 31 and is maintained throughout the full extent of the time that either of these valves is opened. Thus, when either pilot vburner is burning or should be burning, its

ignition means' is in operation. This en sures against a pilot-becoming extinguished and any fuel being wasted or escaping yto cause damage.

The valve 12 previously referred to, when closed, cuts olf the supply of fuel to the manifold 13, and thus will extinguish either burner and its pilot light which happens to be burning at the time it is turned off and will stop the operation of the control motor at whatever position of the cycle it has reached. Whenever the valve is again turned on, the cycle will be resumed at exactlyy the place wheretit stopped so that whichever burner was burning will be relighted for the ,remainder of its period.

The circuit to the induction coil. closed by the switch 49 mounted for operation by the same handle 51 which controls the valve l2 so that when the valve is closed, the circuit is opened and vice versa. that when the valve'is closed, all flames are extinguished, and the ignition means is put out of operation so thatthere is no danger of igniting any inflammable gases Vwhich may be present. Immediately upon movement of the handle y51 in the opposite direction, however,'the 'fuel is turned on to the motor and to any burner which may have been burning when the motor Was stopped and the ignition immediately starts,

burner valve and ignite the main burner.

By using pilot burner control as above deusedand one that will use but a small quantity" of fuel, which can be exhausted from the pipe 55" into the atmosphere is desired without any great waste. The valycsfand forthe pilot burners can be very small u antity of fuelwhich cause of the smallthey must handle, an the valves 30 and 31 can 'thus be readily operated by a control motor of small size, =light weight and low cost. However, the burners may be as large This ensuresy motor 38 can be j l so that after the pilot burner has been ignited,it will open its main as'desired, and very large valves 18 and 19 can be controlled by the temperature responsive means. This reduces the cost of the whole equipment and makes it more com- 5. pact. AtA the same time it ensures vmore certain ignition of the main burners, for the pilot burners lbeing smallcan have their fuel ignited more readily by an electric ignition y means than could the main burners, and the pilot flames will ensure ignition of the main burners.

The burner control disclosed in this application was designed particularly for use in a motor -vehicle or truck carrying'an ad- '15 vsorption type refrigeration apparatus. The

two burners shown are arranged to alternately heat the adsorbersfto drive" off the adsorbed vapor and again place them in condition for adsorption. The electric ignition 2 'is readily connected to the storage battery of the vehicle, and the combination shut-olf valve and switch'is provided within the easy lreach of the operator so that all iame and sparks can be cut oli', for instance, when the V vehicle is in a garage or taking on a supply 'of-fuel, so that there will be no danger o f irew. No part of the refrigeration apparatus has been shown since it is to be understood that the invention is not limited in this `respect but is `applicable to the control of any type of burner or burners. A

' Having thus described the invention, what -is claimed as new anddesired to be secured by Letters Patent"is:.

condition of 'its-pilot burner to actuate each main burner valveand means tov selectively vlight said pilot burners.

' 2. In a multiple burner control syst/em, in combination, a source-*of fuel supply, a plurality of main burners connected to said fuel' A source, a pilot burner for each main burier, a valvel for each main burner, veach valve be# condition of its pilot burner to actuate each main burnervalve, af' valye for each pilot burner, means to successively open said pilot burner valvesandmeans to ignite tlie Jfuel 5 at the pilot burner wliose valve is opened. A

3. In a multiplegbu'rne control system, in combination: a source voffuel supply, aplu trality'ofmain burners connected to said fuel source, a pilot burner for each'l main burner,

a valve for each main burner, each valveibecondition..o`f its pilot burner to actuate each main burner -valve,'a valve for each pilot burner, means to, successively open said pilot burner valves an'd means to ignite the fuel 'at the pilot burnerywhose valve is ppen'ed,

1. In a multiple burner control system, in

ing normally closedymeans responsive to the ing normally closed, means responsive tothe,

'pilot burners and means Wherebysaid igni' tion system is put in operation upon the opening of any pilot burner valve. v

5. In a multiple burner control system, in combination, a source of fluid fuel, a fuel conduit, a plurality of main burners connected to said conduit, a pilot burner for each main burner and connectedto said conduit, a motor connected tosaid conduit and adapted to be driven by said fuel at a substantially conlstant speed, a valve for each pilot burner, a

valve for each main burner, all of said burner valves being normally closed, means ,driven by said motor .to open said pilot burner valves successively, means to ignite thefuel at the `pilot burner whose valve is open, means associating each main burner valve and pilot burner to open the main burner valve when the pilot burner is burning.

6.. In a" multiple burner control system, in

combination, a source of Huid fuel, a fuel conduit, a shut-off valve between saidisource and conduit, a plurality of-mainburners connected to said conduit, a pilotc'burner for each main burner and connected to said conduit, a moto;` connected to said conduit and adapted to be driven by said fuel atta substantially constant speed, a valve for ach pilot burner, a valve for each main burner, all of saidburner valves being normally closed, means driven by said motor to open said pilot burner valves successively, means associating,v each main burner valye and pilot burner tc open the Amain burner valve when the pilot burner is burning, an electric ignition system for said Apilot burners, means driven by said motor to start said ignition system when anyy pilot burner valve is opened, and means von-said shut-off valve to open said ignition vcircuit when the valve is closed and close thesame Kwhen the valve is opened.

Z. In.'a multiple burner-control system, in combination, a source of Huid fuel, a pluralf ity of main burners,a pilotburner for each main burner," ignition means for said `pilot burners, means Vresponsive to the burning of each pilot burner to turn -on the fuel @to the corresponding main burne',a substantially constant speed motor adaptedto successively turn on the fuel" to said pilotfburners and means to simultaneously stop said motor, shut olf all fuel and stop said ignition means.

In a burner control systenvl,4 combina-cA tion, a source of fuel, a burner, a valve controlling the liow of fuel to said burner, a pilot burner, a pipe connecting said source of fuel supply to said pilot burner, a valve in said 5 pipe, electric ignition means for said pilot burner, a motor actuated by the flow of said fuel to move at a substantially constant speed, said motor being in control of said second mentioned valve and said ignition means7 said lo first mentioned valve being under the control of said pilot burner.

9. In a burner control system, in combination, a source of fuel, 'a burner, a Valve controlling tlie flow of fuel to said burner, a pilot burner, a pipe connecting said source of fuel supply to said pilot burner, a Valve in said pipe, electric ignition means for said pilot burner, a motor actuated by the flow of said fuel to move at a substantially constant speed,

said motor being in control of said second mentioned valve and said ignition means, said first mentioned Valve being under the control of said pilot burner, and means to simultaneously stop the operation `of. all parts c of said systei v In testimony whereof I hereunto aiiix my signature. v

GEORGE E. HULSE.

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