US866265A - Safety appliance for steam-boilers. - Google Patents

Description

No. 666,265. PATENTEDSBPT. 17;-1907. r H. GRIPPEN. f"

vSAFETY APPLIANGE FOR STEAM BOILERS.

APPLIOATION'FILED JULY 17, 1903.

mi E? Wi e. 1'* Attorney tionalview of a steamboilerfprovidedy with a safety steamjzboilers and more especially to that class of such l device/s` particularly applicable to boilers employing a f .vention to, produce an appliance of this character 15' terrupted or cut o ff should thewater level within the; boiler reach a predetermined stage, and also to provide I hereinafter morefully described and .device embodyingmy` said invention. Fig; 2 is a cen; tral vertical sectional viewy taken longitudinally 3o' sition ofv the parts after operation.

, 2. Passing directly over this' burner, and entering the crown sheet of thefboiler, is a pipe 3, the upwardly' extendingportionv4l thereof 'beingconne'cted to the ,40 I

scription vof the same, reference being had to the `ac'- companying drawings, forming a part of this specifica-l uninterruptedA pending the readjustment of the parts` ofthe appliance.

'the claims hereunto appended.

,y In the present embOdnientomyinVention des; 35

. The length of this pipe i may be varied under differ-V ent conditions, but in all cases will be of a length equal to the..height of thelextreme low water level, or the lowest level atwhich it is safe to run the boiler. l 45 burner-2is a fitting or casting 5, provided with an ap- -f UNITED s TArES AIENT OFFICE.,

"HERBERT oRrrrEN'-, or RocHsTER,'NEW YORK(- SAFETY APPLrsNcE- Fon' STEAM-normas.

To all whom it may oo'nm:

Be it known that I, HERBERT CnrrrEN, of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Safety Appliances. for Steam-Boilers;' and I do hereby vdeclare the following to be a full," clear, and exact'detion, andtotheneference numerals 'marked thereon. Mypresent inyention relates tosafety appliancesfor liquid or gaseous fuel; and it is the object of my inwhereby the supply of fuelwill be automatically in means whereby the device may be reset to restore the fuel supply so that the service of the boiler may be Otlier'eature's ofV novelty advantagewill be pointed out in i Injthe drawingsz`` Fig'iire 1. is acentral 'ertical sec through the device, "sho`wijng the parts 4in the normal position, and Fig.' 3 'is 1a similanview showing the po Similar reference numerals in the indicate similar parts'.`

ignates the shell 'of a steam boiler of any suitable type, beneath which is` located ,any suitable form of burner pipe- 3, within or above the crown sheet ofthe boiler.

Upon thev opposite end of the" pipe23 outside the erture 6 within which is threaded or otherwise secured 9 tothe pipe '10, throughthe boiler shell `and provided with an upturned portion 11 terminating at Specification of Letters Patent.n Application iiled July 17,1903. Serial 110.186.032;

[held Patented sept. 17, 1907'.

with the atmosphere is controlled by A screw threaded aperture is provided in the fitting or casting 5, substantially in alinement with the pipe 3, and into this aperture is fitted the plug 17, carrying burner. Fitted within this tube 18, and extending through the plug 17 isy a rod 19, preferably provided 'upon one end with thefcormgation's 20. This rod 19 the screw threadi ed lplug 14, provided with thepassage 15.

the tube or sleeve 18, o f a reduced size, and extending s into the pipe 3, until the end thereof rests above the normally occupies the position shown in 2, and is tweenthe end of said rod19 andI thetube 18 and 'm composed of any suitable alloy or other material melting at a'comparativelylowtemperature; As the rod yretained from operation by lthe vfuse 21', .interposed bef 1 9 passes through the plug- 17, ajstufi'ng-box 22 i's pro vided to forma tightv joint. At the extremity of thisf rod19 is formed one ofthe members 23 oi a connecting u being emjoint, screw-threads or other suitable means ployed in securingt-he same to said 1 v Extending laterallyfrom the 5 are a pair of' diametri'cally disposed lugs 24-24 provided-with relv cesses 25-25. Iritothese rec, 25-25 adapted 'torest the extremities ofthe arms 26-26 of theframe 2,7. `Mounted,longitudinally of this frame 27 is a valve jstem 28 carrying at one end the connecting .member 29 connected tothe correspondingmember 23 by the` removable screw or pin 30, to form a joint. Adjacent:`

this member` 29 the valve stem.28 is screw-threaded, as at 31, and over these threads is fitted the thumb nut 32 normally occupying theposition indicated in full4 v I lines in Fig. 24 Adjacent this thumb. screw 32 is an abutment 33,` which the stem 28 isslidingly tted. Upon one side of. this abutment is provided Aa side thereof is providdla spring4 seat 34.

Upon the valve stem 28 is provided a stop 35 against spring being to move said rod 19 and the stem 28 to theVY seat 33"* for the thumb-screw 32, andupon the opposite which abuts the spring seat 36. Between the spring` seat 36 and the-spring seat 34 the helical :ompression spring 37 is interposed, fthe normal tendency of this left.4 Howeventhe fusible connection 20 between the` tube 18 and the rod 19 normally retains the parts inthe position shown in Fig. 2.

Upon the-end of the valve stein 28 `is screw-threaded` or otherwise secured the needle valve plug l38 provided with a `valve seat 39 adapted to register with the valve s'eat 40`injthe casting 41 to form a cut-off for the fuel supply. This casting 41 is ,provided with an externally-screw-threaded extension( 42, screw-threaded into the end of'the frame 27, in aiinement with the yalve stem 28. extension 42 is formed hollow and 'into this hollow portion may be fitted the guide orsup .'port 43 for the'. valve stem 28., A stung-box gland 1.10 44is also fitted: -withinthis hollow extension, being;

in :the capnuttscrew-th'sded upon'.

the extension 42, to form a tight joint through which the valve stem 28 may slide.

Leading from the valve seat 40 in the casting 41, is formed a passage 46, passing through thefextension 47 of the casting, said extension being externally screwthreaded, over which is fitted the nut 48, carrying the coupling piece 49 secured to the pipe 50 connected to a reservoir or other source offuel supply.

Perforating the casting 41 above the valve seat 40 is provided a passage 51 leading through the extension 52, said extension being also provided with any suitable form of coupling, such as 53 and 54, connected to the pipe 55, leading to the vaporizing retort 56 and burner 2, both of which may be of any suitable type.

In proximity'to the thumb-screw 32 is a stop of any i suitable construction, said stop in the present embodi- Ament consisting of a thumb screw 57 provided with a screw-threaded stem 58 passing through the-frame 27 and engaging the thumb nut 32 to prevent rotation of said nut upon thestem 28, when said parts are in the position shown in Fig. 2.

Under ordinary conditions evaporation of water within the boiler will normally take place frbm a level in proximity to the dotted line, Fig. 1. Under these conditions a constant circulation of water will be maintained through the pipes'lO, 7, fitting or casting 5 and pipe 3, entering the pipe 10 from the boiler, passing around the elbow 8 and down the pipe 7, through the casting 5 between thetube 18 and the pipe 3 and back into the boiler through the extension 4. This circulation is set up and maintained by the superheated water in the pipe 3, located directly above the burner, rising, causing water at a comparatively lower temperature. to passdown into the inlet pipe l0. Under normal conditions this circulation will continue. However, should the water level fall to the level of the tops of the inlet and outlet pipes 10 and 4 respectively, it will'be obvious that the circulation of water through said pipes will befinterupted, and the water remaining in the .pipe will be quickly evaporated or dispelled by the heat of the burner directly beneath. Heretofore the fuse 21 will be protected by the water passing through the pipe 3,I the temperature of which is considerablyl below the fusing-point of the fuse. However, when the water has been dispelled from said pipe 3, the tem# perature thereof will rapidly rise, and communicating its heat to the fuse 21, -will melt the same, breaking the connection between said tube 18 and the rod `19, releasing the said rod. As the valve stem 28, under tension of the spring is connected to, and normally retained in operative position by the rod 19, it will now be released, and acting under the influence of the spring 37 will be thrust to the left causing the needle valve 38 to seat itself upon the valve seat 40, cloing communication between the supply pipe 50-iand the pipe 55 .leading to the burner and consequently causing the burner to be extinguished. f. Thus it will be'lseen that the source of heat-is removed when the' water level falls to such a degree asto endanger thel crown sheet, tubes or other parts of the boiler through overheating,

vand to eliminate 'danger from all possible sources, such as the sudden entrance of feed water under illch conditions. As the source of h eat is removed from the` boiler, the same will now rapidly cool, and the water level may thenbe restored to its normal working level.

provided, upon the -screw-threaded portion 31 of the i stem 28, which may be rotated after the set screw 57 has been retracted, to cause the cut off or needle valve to restablish communication between the supply pip 50 and the pipe 55 leading to the burner. l

ln order to renew the fusible connectionl 2l, the pin or screw 30 connecting the rod 19 and the valve stem 28 is removed and the plug 17 is unscrewed from the casting or fitting 5, when the rod 19 and the tube 18 will both be accessible. After the fuse connection between the end of the rod 19 and the tube 18 has been renewed,

- said plug may be replaced vin the casting 5, and the parts restored to the position shown in Fig. 2, when the needle valve 38 will be held open and the device will be again in its operative position. i

The valve plug 14 is provided for draining or blowing off the'pipes 3 and 7, to remdve sediment or to withdraw the water therefrom after blowing off the boiler.

While I have illustrated and described certain pipe connections and fittings inthe present embodiment, itA will of course be understood that any suitable connec-v tions may be employed as desired. Y l

It will also be understood that l do not limit myself to the details of construction ,herein shown and described, as many modifications and changes might be made, which modifications and changes could be made without departing from the spirit of my invention.

I'claim as my invention- I 1. The combination with a steam boiler, a water chamberrzaommunicating wit-h `tshe water space of said boiler and a burner having a tuei supply, of a part projecting into said water chamber, a cut-olf for the fuel supply including a valve 'and a stem therefor also projecting into the chamber, anda fusible connection between the valve stem and the .projecting part for normally retaining the valve in open position.

2. The combination with a steam boiler, a burner therefor having a fuel supply connected thereto and a water chamber enposed to the 'heat of the burner, of a cut-oft valve for the fuel supply having its valve stem provided with a'detachable partprojecting into the water chambei` of the boiler, a sleevealso projecting into the water space of the boiler adjacent to the stem, a thermally con trolled device normally connecting the said stem andsleeve, and a detachable part containing the sleeve and` the detachable part of the stem;

3. The combination with a steam boiler, a burner therefor having a fuel` supply connected thereto, and a water chamber communicating with the water space of the boiler and exposed to the heat of the burner, of a cut-on valve for controlling the fuel supply located exteriorly of the boiler` and having a stem with a parvtextending into the water chamber thereof, a sleeve lnc'losing said stem, and

,a fusible 'substance normally sealing the bore of `the' the boiler, a cutolf valve for the fuel supplyhaving a stern with a part extending through the fitting into `the water spaeeof the boiler, means normally tending to operate the stem, a sleeve secured to the iitting and surrounding the stem, `and a,fusible.substancenormally seal-- between th sleeve and stein.

, ing the bore of the sleeve and serving as a .connection l 5. The combination Awith a steam holler, and a bui-ner v therefor having fuel supply connected thereto, of a hollow tting'secured to the Aboiler, and. communicating with the Vwater agace thereof, a'plug detachablefrom the fitting and carrying relatively iixd and movableI members,

a thermally-,controlledconnection between said members,

- frame having arms adapted to4 coperate with said .valve stem guided in said frame and connected to the optween the valve and tting.

fthe fitting, a` valve for the fuel supply having a part conthe sleeve and extending loosely through the plug, a. fusible 'for havinga fuel supply connected thereto, of a hollow .means for reopening said cut-onf independently of the re- 'a releasing device to. permit the closing. of said fcut-oft `upon 'the interruption of circulation through said pipe,

l scopes and a valve lin the fuel supply controlled in its operation by said movable member. v

6. The combination with a steam boiler, and a burner therefor having a fuel supplyconnected thereto, of a fitting' having portions communicating with the boiler and exposed to the heat of the burner, a plug detachable from the Iitting and carrying relatively stationary land movable members, a thermally-controlled connection between ythe said members for normally preventingtheir relative movement, and a. valve for the'fuel supply having its stemconnected to said movable member.

7. The combination with a boiler, and a' burner therefor having a fuel supply connected thereto, of va fitting having portions communicating with the 'boiler and exposed to the heat of the burner, a plug' having a sleeve thereon projecting into'the fitting, a stem inclosed by the sleeve and extending through the plug to the exterior of trolled by thesald stem, and a thermallycontrolled connection for normally preventing relative movement of the stem and sleeve. v

8. The combination with a boiler, and a burner therefor having a fuel supply connected thereto, of a iitting having portions communicating with the boiler and `ex-- posed to the heat of .the burner, a plug detachable from the fitting having aV sleeve iix'ed therein andlprojecting into the fitting, a relatively movable `stem surrounded by .v

connection between the sleeve and stem for normally pre-` venting relative movement between themand a valve for the fuel supplycontrolledby the said stem.

.9`. The combination with a heilen-and a burner therefitting, pipes connected at their outer ends by said fitting and having their opposite ends extending vertically to a -given level within the boiler, one of said pipes Abeing exposed to the heat of the burner, a thermally-controlled device arranged with one of said pipes, andal valve for thev fuel supply controlled in its operation by said therwally-controlled device.

10. The combination with a steam boiler and a burner having a fuel supply-connected thereto, of a water chamber connected to said boiler and exposed to the vheat of the burner, a cut-oil? interposed between saidfuel supply and burner, An releasing device to permit the closing ofgsaid cut-oit' during the absence of water in ysaid chamber, and

leasing device.

11. The combination with a steam boiler and a burner having a fuel supply connected` thereto, of a water circu lating pipe connected to said boiler and exposed to the heat of the burner, a cut-oit interposed between said fuel supply and burner, a spring operating to close said cut-oif,

and means for overcoming the action of said spring and reopening said cut-olf. i

12. The combination with a boiler, and a burner therefor having a fuel supplyv connected thereto, of a hollow f fitting having communication with the boiler and provided with laterally-arranged lugs thereon, althermallycontrolled device carried by said fitting and having an operating part extending to theex-terior of the latter, a-

lugs, on the fitting, a valve for the fuel supply, and` a erating part of the thermally-controlled device. v

13. The combinationvwith a boiler, land a burner therefor having a fuel supply connected thereto, of a hollow fitting 'having communication with the boiler and provided with a part exposed to the heatlof they burner, a rod extending into the fitting, a thermallylcontrolled device for normally preventing movement of the rod,l a valve for the fuel supply, a stem for operating `the valve having a detachable connection with the said rod, and a frame serving to guide the said stem and as a connection'be 14. The combination with a steam boiler, and a burner therefor having a fuel supply connected thereto, of a water -cated within the water chamber and connecting .eating with the water space of the boiler, a cutbif located in the fuel supply having a relatively movable operating portion extending Ainto the water chamber and va fuse located in said chamber connected to saidl operating portion to normally restrain its operation. 1 y85 15. In combination with a steam boiler and a burner therefor having a fuel supply connected thereto, of a water chamber communicating with the water space of the boiler, aient-oil? located in the fuel supply having a relatively movable operating member, and a removable plug fitted in the water chamber having a relatively fixed `projection extending into the water chamber, a relatively movable portion extending into said chamber and connected to the operating member of the cut-off and a fusible substance losaid projection and movable portion.

16. In combination with a steam boiler-a burner there- I for'having a fuel supplyn connected thereto, and a water chamber communicatingwith the water space of the boiler, of a cut-off located in the fuel supply, a relatively movable operating member therefor, a plug removably tilted in said water chamber having a hollow portion projecting therein, a longitudinally movable portion located within said hollow portion and connecting with the operating portion of the 4cut-oli?, and a fusible connection within the said chamber and normally connecting said hollow and movable portions.

17. In combination with a steam boiler, a burner therefor havinga fuel supply connected thereto, and a water chamber communicating with the water space of the boiler, of a cut-onf located in the fuel supply having a relatively movable operating member, means normally acting thereon to close the cut-olf, and a plug removably fitted in theY Water chamber having a hollow portion projecting therein, a longitudinally movable portion mounted in said hollow portion and connected to said operating member, and a fusible connection between said hollow and movable portions normally serving to retain the latter in rclative'ly iixed relation. Y

18. The combination with a steam boiler, a burner therefor having a fuel supply connected thereto and awater chamber communicating with the water space of the boiler, of a valve located in the fuel supply having a movable operating member, means normally acting thereon to close the valve, a plug removably fitted into the water chamber having a tubular extension thereon, a rod movable longitudichamber exposed to the `heat of said burner and communinally within said extension and connected to the operating Amember of the cut-olf and a thermally controlled device for normally retaining retracted positions. I

19. The combination with'a steam boiler, and a burner the rod and operating member in their therefor having a fuel supply connected thereto, of a water circulating chamber extending through the combustion chamber' of the burner and communicating at different points with the'water chamber of the boiler, a cut-off located initheflel supply having an operatingmember, and a fuse controlled by the temperature within said chamber for controlling the operation of thevalve operating member. l

20. The combination with a steam boiler, and a burner thereforv having a fuel supply connected thereto, of a water circulating pipe extending above -the burner and communicating at both ends with the water space of the boiler, a cut-om'in the fuel supply having a valve stem extending into said pipe and normally operating to close the cut-off and means controlledby the temperature within the said pipe and connected directly to the valve stem for retaining the stem in its retracted position.

21... The combination with a steam boiler, a burner there' for having a fuel supply connected thereto, and a water chamber communicating with the water space of the boiler and exposed to the\heat of the burner, of a cut-off valve located in the fuel supply, a longitudinally movable valve stem for operating the latter, a relatively xed tubular extension projecting into the water chamber, a longitudinally l movable rod mounted within the tubular extension and movable withthe valve stem, and means controlled by the temperature .within the chamber for normally retaining said rod und extension in fixed re'lation.

22. In a safety appliance, the combination with s.

steam boiler, and a burner having a fuel supply connected thereto, of circulating pipes extending through the conlbustion chamber of the burner and having their apertures located at a predetermined height within said boiler, a fitting connecting said pipes through which Water from said boiler normally circulates, a stationary member located in one of said pipes, a movable member, a fusible` connection between said members, and a controlling device connected to said fuel supply, and adapted to be released by said movable member to interrupt the fuel supply after the circulation through said pipes ceases.

23. In a safety appliance, the combination with a steam boiler. and a burner and fuel supply connected thereto, of circulating pipes exposed to the heat.of the burner and having their apertures located at a predetermined height within said boiler, a tting connecting said pipes through which water from said boiler normally circulates, a plug carrying a stationary and a movable membertted in said fitting, a fusible connection between said members, and a controlling device connected to said. fuel supply, and adapted to be released by said movable member to interrupt the fuel supply after the circulation through said pipe ceases. f jf 24. ln a rsafety appliance, the combination with-a s'tea boiler, and a burner having a fuel supply connected thereto, of circulating pipes exposed to the'heat of the burner and having their apertures located at a predetermined height Within said boiler, a .fitting connecting said pipes through which water from said boiler normally circulates, a stationary member located in one of said pipes, a movable member, a fusible connection between said members, and :l controlling device connected to said fuel supply, a valve` stem for operating said device adapted to be released by saidI movable member to interrupt the fuel supply after the circulation through said pipes ceases, and a retracting device operating upon said stem for restoring the fuel supply.

25. ln a safety appliance, the combination with a steam boiler, and a burner having a fuel supply connected there.

to, of circulating pipes exposed to the heat of the burner and having their apertures located at a predetermined height within said boiler, a fitting connecting said pipes through which water from said boiler normally circulates, a plug carrying a stationary and a movable member fitted in said fitting, a fusible connection betwen said members,

and a controlling device connected to said fuel supply, and adapted to be released by 'said movable member to interrupt the fuel supply afterthe circulation through said pipes ceases and var retracting device for said controlling device to restore sadtuei supply.

26.v The combination vwith a steam boiler, a burner therefor and a fuel supply connected thereto, of a water chamber communicating with the water space of the boiler, a frame connected thereto having a cutoff valve at one end thereof connected -in the fuel supply, a valve stem. movable longitudinally of the frame for operating the, cut-off, a spring interposed between the frame andthe stem for operating the latter, an extension connected to said stem and 'extending into said water chamber a relatively fixed member projecting into said water chamber, and means controlled Vby the ytemperature of the water chamber for normally connecting said extension and fixed member and thereby retaining the valve stem retracted.

27. The combination with a steam boiler, a burner therefor having a fuel supply connected thereto, and a water chamber communicating with the water space of the boiler, of a cutoff valve located in the `fuel supply having an operating stem, a spring for operating said stem toI close its valve, and a plug removably fitted into the water chamber having a tubular extension thereon, an extension connected to said stem and movable longitudinally within the tubular extension, and a fusible substance connecting 'said extensions. j

28. The combination with a boiler, a burner therefor having a source of fluid fuel supply connected thereto, and a cut-off in the fuel supply having an operating stem and means normally operating thereon to close the cutoff, of a water chamber communicating with the water space of the boiler, a tubular extension projecting into the water chamber and having the valve stem movable longitudinally therein, and a fusible substance sealing the tubular extension and forming a connection between the tubular extension and valve stem to prevent operation of the latter while the temperature in the water chamber is normal. f

HERBERT CRIPPEN.

Witnesses:

J. B. M. STEPHENS, SARAH W. NEWMAN.

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