US1015703A - Safety apparatus for steam-boilers. - Google Patents

Description

H. NEVILLE. SAFETY APPARATUS FOR STEAM BOILERS.

AiYLIOATION I ILBD 3130.8, 1910.

Patented Ja n 23-, 191 2 2 sums-sum 1.

arrow H.- NEVILLE.

SAFETY APPARATUS FOR STEAM BOILERS. I 7 APPLICATION FILED DEC. 8, 1910. I

- 0.15',703 I v Patented'Jan.23,1912.

. 2 HEETS-SHEET z.

31?..5" if v 12! I 5 8141mm foz UNITED srarn's PA ENT OFFICE, r

HARRY NEVILLE. OF LOS ANGELES, CALIFORNIA, ASSItii-NOR OF ONE-FIFTH T GEORGE H. GOODWIN, ONE-FIFTH TO DANIEL P. KELLOGG, ONE-FIFTH TO WILLIAM F. MERRY, AND ONE-FIFTH TO PATRICK SHEEDY, ALLOF LOS ANGELES, CALI- FORNIA.

To @22 whom it may concern.- 7

Be it known that I, HARRY NEVILLE, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, has invented certain new and useful Improvements in Safety Apparatus for Steam-Boilers; and I do declare the following to be a full, clear, and

.more efficient.

\Vith these and other objects in view, the invention conslsts of CGI'tilll'l' novel features of construction, combination and arrange- 'ment of parts as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings: Figure 1. is a front View of a portion of a locomotive boiler showing the invention applied thereto;

Fig. 2 is a side viewv of the same with parts broken away and in section; Fig. 3 is an enlarged central vertical section of the steam controlling valve and means for automatically opening the same to admit steam to the alarm and tire controlling mechanism; Fig. 4 is a cross sectional view on the line of Fig. 3; Fig.5 is a'similar View on the line 5-5 of Fig. 3.

' Referring more particularly to the drawings, 1 denotes 'a steam-boiler which is here shown as being heated by an oil burner. 2.-

Arranged on the boiler atany suitable'point is my improved-automatic alarm mechanism, said mechanism beingshown in the present instance as arranged on the front of the boiler and connected thereto at a point which SAFETY APPARATUS FOR STEAM-BOILERS.

Specification of Letters Ela tent. Patented J an; 23,1912, Application filed December 8, 1910. Serial No; 596,304.

cally disposed water and steam circulating passage 6 which is connected at its upper end to the cylinder 3 by a passage 7 and at its lower end is connected to theeylinder by .apassa'ge 8. The passages 7 and 8 open through the outer sides of the wing and are interiorly threaded as shown. In the threaded end of the passage 7 is arranged a plug 9 While to the threaded end of the passage 8 is connected a steam and water pipe 10 leading to and connected with the boiler at its low water point. In the pipe 10 is arranged a valve 11 whereby the apparatus maybe out 01f from the boiler. The lower end of the cylinder 3 is closed and has formed therein a threaded blow oil passage 12 with which is connected the upper end of a blow off pipe 13 in which is arranged a valve 14. The blow "off port and pipe are provided to permit any sediment or foreign matter to be blown out of the cylinder and the latter thus kept clean. The passage 6 serves as a receiving chamber for such steam as may escape when byreason of the swaying of the locomotive the water momentarily uncovers the pipe 8. Thissteam will pass into the annular space around the mercury cup 16 but owing to the presence of the air space between the ,duct 6 and the cup, the temperature of the steam will be reduced sufii'ciently to'preventexpansion of the mercury until the Water has uncovered the pipe 8 for a sufiiciently' ldngf period to warrant action. The upper-openendof thecylinderi I isthreaded and in thesameris screwed the enlarged "open upperyend 1533f v aimercury holding cup "16 whiclrprojects downwardly in the cylinder 3 to near'thelower end thereof. Thee-up 16.is-ofilessdiameterthan the cylinder thereby forming a passage or'space around between the, same and the cylinder.

annular flange 17 which when the head is y '95 On the head 15 of the cylinder'fis formed an screwed'down'i'nto the cylinder comes into engagement with the upper end of the latter and thus forms a tight joint between the has-been determined upon asa low==water level. p y I My mproved illil lfll'lllChEt-IHSITI comprises a steam and water cylinder 3' havin -on onev 'der from the lug 4. is formeda' wing or extension'e having formedtherein a vertihe'ad of the cup and the cylinder. The cup 16'is' threaded fiear'its'upper end as at 18' and above saidthreaded portion isenlarged to form a shoulder 19 above which the upand 1 said enlarged 'bore threaded as at 20. Screwed into engagement with the threaded bore 20 of the upper end of the cu is the per end of the cup is still further enlarged reduced threaded lower end"of a steam valve casin '21 in which is arranged a valve seat 22 a apted to be engaged by a steam con+ trolling valve 23. The valve casing 21 is 6 provided with a steam inletpassage 24 and a steam discharge passage 25. With the passage 24 is connected a steam conducting pipe 26 leading to and connected with a. steam dome 27 or other point from which steam may be taken from the boiler. In the pipe 26 is arranged a cut oft valve 28. -With' the steam discharge passage is connected steam conducting pipes 29 and 30, the pipe 29 of which-extends to and is connected with 15 an alarm whistle 31 arranged at any suitable point while the other pipe leads to and is connected with a sultable operating mechanism 32 for controlling the fuel supply valve of the burner. The construction 2 oithe valve controlling mechanism "32 forms .no part of the present invention and is not therefore illustrated in the drawings.

' The stem 533 of the valve 23 projects downwardly in the casing 21 through astufiing' 2 100x34 arrangedinsaidvalve casing 21. The head of the packing nut 35 ot' the stufiing 'box 84 projects into an open cage 36 formed on the lower portion of the valve casing 21 and in said head of the nut is formed an 39 annular series of vertical notches 37 which may be engz'iged through the open cage 36 by a spanner to adjust the nut. The lower end or the stem 33 of the valve 23. projects through the packing nut 35 and into the cage 36 as shown. In the lower end of the valve stem is formed a threaded socket 38 into which is fitted an, adjusting screw 39 by lneansofwhich'the stroke of the valve a stem is increased or diminished. The screw 39 islockcd in itsiadjusted positions by a jam nut 40 arranged on the lower "end thereof as'shown. f v

' Arranged in the lower end orca-ge 36 of j the-valve casin 21 and having a threaded engagement at 1ts lower end with the upper portion 18 of the mercury cup 16 isa p1ungeror piston cylinder 41 on which'is formed an annular flange 42 which, whenthe cylinder 41 is screwed down "into the up er end 0 of the cup 16, engages the Tshou. der'f 19 formed-at the end oi the threaded port-ionv 18 ofthe cup as shownQSlidably mounted in the cylinder-411st]. piston'or plunger 43 the upperflend of which works through a' stufling box 44 arranged on the upperend :of the cylinder41. ,On the upper end of. the plunger or piston/13 is arranged a brass bushing 45 the gipperiend of which projects] through thestu ng hox 44 and engages the,"

6.0 lower end ofthe valve stem adjusting screw 7 Q 39 wlierebywhen the plunger is forced upwardly inthe cylinder 41 the valve 23 will be lifted fromlts seat 22 and steam thus '1 permitted to pass throughftl 'ei-valve casing Q from the steam" conducting pipe 26 to the lv v steam conducting pipes 29-and 30 to sound the alarm and actuate the fuel valve operating mechanism. g

It will be observed that between the -pis ton 43and the body of mercury-is an" 1m? 7 occupied space whereby the-mercury is per mitted to-expand somewhat without'actu ating'the piston. 2 The time expansionjprovided for by the peculiar arrangement of the passages 6 7 and 8 .is thus accentuated 7 5 so that there will be no frequent, and unnecessary sounding of the alarm asthe water titfullynncoszers-the pipe 8 under the sway- 111%0f the locomotive. ,7

he stufiing box 44 isprovided with an adjusting cap nut 46 in which is formedau annular series of vertically disposed notches 47 which, through the'open ea c 36;"mey be engaged by a spanner toe ectadjtiSt ment'of the nut. With the, notches 37*of the packing adjusting nut 35 of ,tlie'stufiing box 34 and the notches 47,-of the adjusting cap 46 are en aged spring projected locking dogs 48 whici' are slidably mounted hollow plugs 49 arranged in one side-of'the cage 9 .36 as shown.-v--'-The dogs 48 are provided with reduced stems 50 around which are coiled projecting springs 51 arranged-in the outer ends of the plugs 49 whereby said dogs are forced inwardly into engagement 5 ,with the notches 37. and 47 of the packing ;a djusting nuts 35 and 46 to'lock the same against casual loosening or unscrewing. Inf the upperend of the cup 16 is formed a drain passage 52 which communicates with m the space between the upper end of the cup and the valve casing 21 thus permitting any water which might otherwise accumulatein this space to escape therefrom. t I ,In the upper end of the valve casing 21 is formed a-- threaded opening in which is screwed a cap 53 having formed therein a cent-rally disposed guide passage 54 in which is slidably mounted a valve closing plunger '55 the upper'end of which works through" i a stufling box 56, arranged in the upper end 'of the cap, and pro'ect's a suitable distance above the stuffing hox as shown. On theupper end of-the cap 53 is arranged a hearing bracket 57 with which is pivotally c0n in'ec ted theinner end of a plunger operating lever 58which extends across the upper end of the valve closing plunger fiywhereby when said lever ispulled downwardly the valve 23 will be closed against itsseat 22, "thereby cuttingoif the supply of steam to the whistle and fuelcontrolling mechanism. 1 In-th'e outer end of the lever 58 isform'ed a hole 59 in 'which is connected the upper end a an operatipig chain 60. said chain extending downwar' y to within convenient reach of the attendant whereby' hej may close the "valve 23 after the parts have been operated to sound the alarm." t I30 It will be noted that the apparatus is It! catcd entirely outside the boiler and exposed to the atmosphere which arrangement is an important feature in connection with the operation of the device.

In the operation of the apparatus a sufficient quantity of mercury is placed in the mercury holding cup 16 and the valve opened which,-under normal conditions, will.

permit the water from the boiler to pass through the passage 8 into the cylinder 8 to fill the latter and the'passages 6 and 7. The

'water thus let into the cylinder 3 will be the steam has thus entered the cylinder the water level to both admit and discharge wa- -5O .heat thereof will be suflicient to cause the mercury in the cup 16 to rise into engage- ;ment with the piston or plunger 43 thereby forcing the latter upwardly into engagement with theadjusting screw 3 of the valve stem 33 and consequentlyylifting the valve 23 out of engagement withits seat'22 whereupon steam from the boiler will pass through the valvecasing for the purpose described.

' From the foregoing description taken in connection with the accompanying draw ings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various "changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any ofthe advantages of the invention as defined in the appended claims.

Having thus described my invention, what I claim is:

1. -A device for the purpose set forth com prising a cylinder having a single port communlcating with a steam boiler at the low ter and steam, a cup arranged in said cylinder closed against the same and arranged to be acted upon by both the water and the steam, a heat expansible liquid in the cup, a

steam valve and a plunger acted upon by said heat expansible liquid to actuate the valve.

2. A device for the purpose set forth comprising a cylinder having a single port communicating with a steam boiler at the low water level to both admit and discharge wa ter and steam, a cup arranged in said cylin der closed against the same and arranged to be acted-upon by both the water and the steam, a heat expansible liquid in the cup,

valve casing threadedin the upper end of the 3 p, a valvehn the casing having a dependlng stem, a piston casing in the cup below'the valve casing, and a piston in said casing above the expansive liquid and on purpose set forth gaging the valve stem.

3. A device for the comprising a cylinder having a port to admit steam and water, a cup arranged in said cylinder and closed thereto, said cup having on its upper end an interiorly and 'exteriorly threaded head, the exteriorly threaded portion'of said head engaging the upper end of the cylinder, at heat-responsive element in the cup, a valve casing having an open cage on its lower end, said cage having a threaded engagement with the interiorly threaded end of the cup, a valve arranged in said casing and having a down wardly projectim stem, an adjusting screw in the lower end of said stein, a cylinder having a threaded engagement in the upper end of the cup, and a piston controlled by the heat-responsive?element and slidably -mounted in said cylinder to engage the adjusting screw in said valve stem whereby to lift said stem and its valve.

4. A'devic'e for the purpose set forth comprising a cylinder having a port to admit a heating medium, a cup engaged therein and closed thereto, said cup having an exteriorly and interiorly threaded head engaging the upper end of the cylinder, a heat-responsive element in the cup, a valve casing provided on' its lower end with an open cage engaging the interiorly threaded end of the cup, a valve in said valve casing having a downwardly projecting stem provided in its lower extremity with a threaded socket, a regulating screw fitted in said socket, a cylinder secured in the upper end of the cup and projecting into the cage, a stufling box arranged on the upper end of said cylinder, a piston slidably mounted in said cylinder and stuffing box and controlled by the heat-responsive element, a bushing arranged on the upper end of said piston to engage the regulating screw whereby to lift saidstem and valve, an adjustable packing nut in Saidstufiing' box provided with an annular series ofnotches, and a spring-projected lockingpin engaged in said cage and adapted to engage said notches whereby to hold the nut in its .,adjusted position.

5.'A device for the purpose set forth comprising a cylinder adapted to receive a heating medium, a cup arranged therein and closed thereto, a heat-responsive element in said cup, a valve casing connected to the upper end of said cup, a cut off "alve arranged in said casing and having a downwardly projecting stem, a cylinder arranged inthe upper end ofsaid cup and within the valvecasmg, a pistonslidably mounted in said cylinder'in osition to engage said stem and controlled y the heat-responsive elesaid valve casing,

4 ing upon the upper end of said plunger.

, 6. A device of the character described,

comprising a cylinder, a cup in thecylin- .der' arranged to provide a acket space surrounding the cup, a circulating space being provided outside the jacket space, a steam and-water pipe from a steam boiler at low water level leading into the jacket space and communicating with the circulating space and the jacket space at its lower end,

a passage being also provided connectingthe two spaces at the top, a superposed valve casing, a steamvalve therein, a depending stem, and a plunger acting on said stembeing arranged in vertical alinement above the cup and the cup beingprovided with an expansive liquid toact on the lower end of the plunger.

7. The combination of a steam casing, a cup secured in said casing and closed thereto, an expansive fluid in said cup, a valve casing'risnig fronrthe steam casing, a cutoff valve within the valve casing, a stem depending from the valve and mounted to slide Within the valve casing, means whereby the expansive fluid will reciprocate said stem, a packing box fixed within the casing and forming a guide for the reciprocation of said stem, a nut on said box having notches in its outer surface,and a holding pin mounted in the side of the valve 'casing and movable laterally thereto to engage said notches.

8. The combination of a steam cylinder having but a single port leading'from a boiler at low water level to admit and discharge steam or water, a cup secured in and closing'the upper end of the cylinder and closed to the steam or water in the oylin der, a heat responsive liquid in the cup, a valve casing rising from the cup inaxial alinement therewith, a guiding cylinder 'se'- cured in the upper end of the cup and projecting into the lower end of'the 'valve cas- 1ng, a lifting pin in said. guiding cylinder actuated by the heat responsive element, a normally seated valve in the valve casing,

and a stem depending from said valve and having its end in proximity to the upperend of the lifting pinto be operated thereby.

9. In mechanism of the character described, a shell containing therein a heat expanding element and connected up with a boiler'at its normal low water line, a valve in a steam line operatively connected up with the heat expanding element, and a valve stem, adjusting screw and plunger between said heat expanding element and valve for adjusting the said valve and timing its operation.

10. In mechanism of the character described, a shell containing therein a heat expanding element and connected up with a. boiler at its normal low water line, a stem actuated by said heat expanding element, a valve provided with a stein operatively in. engagement with said heat "actuated stem, a valve stem, adjusting screw and plungerbetween the valve and heat expand ng elementfor adjusting said valve, and means for locking'the valve stem.

1.1. In. mechanism at the character described, a shell containing therein a heat expanding element and connected up with a boiler at its normallow water line, a stem actuated by said heat expanding element, the shell having openings above the heatexpanding element, a valve in the shell above the openings, a stem projecting downwardly from the valve in line with the stem of the heat expanding element, and a screw projecting from oneand contacting with the end of the other of said stems, whereby the valve may be adjusted:

12. The combination with a locomotive boiler, of a shell, a cup within the shell spaced annularly therefrom, a heat-responslve element in said cup, a valve actuated by said element, a pipe leading from the lower end of the shell to the boiler, a pipe leading from the upper end of the shell, and 'a branch pipe connecting the ipes leading from the upper and lower en s of the shell and spaced from theshelh In testimony whereof I have hereunto set my hand inpresenceof two subscribing witnesses.

v HARRY NEVILLE.

Witnesses: I

ARTHUR S. PREN'mon, EDWARD I. BRYAN'r.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 1 Washington, G.

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