US2354631A - Fire extinguisher discharge apparatus - Google Patents

Description

July 25, 1944. H. V/WlLLlAMSON 2,354,631 FIRE EXTINGUISHE'R DI'S'GHARGEWAPPARATUS I Filed Sept. 28, 1942 4 Sheets-Sheet 1 .July 25, 1944. v, w s0 2,354,631

FIRE EXTINGUISHER DISCHARGE APPARATUS Filed Sept. 28, 1942 4 Sheets-Sheet 2 u y 9 H. v. WILLIAMSON 2,354,631

FIRE EXTINGUISHER DISCHARGE APPARATUS Filed Sept. 28; 1942 ,4 Sheets-Sheet 3 11 1 11v. WILLIAMSON 2,354,631

' FIRE EXTINGUI SHER DISCHARGE APPARATUS Filed Sept. 28, 1942 4 Sheets-Sheet 4,

Patented July 25, 1944 FIRE EXTINGUISHER DISCHARGE APPARATUS Hilding' V.- Williamson, Chicago, 111., assignor, by

mesne assignments; to- Reconstruction Finance Corporation, Chicago, 111., a corporation of the United States Application September 28, 1942, Serial No. 460,010

12 Claims. (01. 299-49) This invention relates to new anduseful im provements in fire extinguisher discharge apparatus and deals more specifically with the discharge of high pressure extinguishers, such as in service. The use of such a manual valve is entirely satisfactory if the party that handles'the hose line remembers, at such an exciting time, to open the valve before running out the fifty carbon dioxide, through hose lines of substan} '5 to one hundred feet of line that is usually wound tiallength. I i 1 on a reel; or, failing to remember, if the dis Carbon dioxide, 'when employed as a fire excharge end of the hose'lineis provided with a tinguishing medium, is usually confined as a second valve which is in a fully operative condiliquid" in either'relatively small bottles or cylintion and which has not been left open by the ders, at the uncontrolled temperature of the suroperator while he returns to the location of the rounding atmosphere, or in large capacity, bulk reel to open the main valve.

storage tanks, at a controlled, substantially con- Carbon dioxide is an "extremely effective fire stant, subatmospheric temperature'of any desired extinguishing medium but its use is subject to value. Confined liquid' carbon dioxide possesses I one limitation which must be constantly kept in a fixed vapor pressure value for every temperamind at all times While designing equipment and ture value. These corresponding temperature while planning installations to protect certain and pressure valuesmay beillustrated by pointhazards. This limitation is that the initial cost ing out that a normal temperature'rangefor the of, portable equipment and fixed installations is liquid confined inbottles or cylinders is from, directlyproportionate to the amount of carbon 60 F. to 87.8" F. and the corresponding pressure dioxide made available for use. Therefore, the range is from 748.6 to 1066.2 pounds per square quantity of carbon dioxide made available for inch, absolute, while the controlled subatniosprotecting any given hazard seldom exceeds, by Pheric temperature t q e y selected for any substantial amount, the quantity that is cal- 13118 liquid ed n bulk 'fl tanks s culated as being sufficient to effect extinguishwhich p d s a esp ng vapor p ssure merit if the equipment is handled and operates of approximately 305 pounds per square inch, properly. In other words, carbon dioxide is absolute. o I .never made available in such unlimited amounts It will be appreciated, therefore, that carbon as water. dioxide in the forms in which it is normally em- .The longer a fire burns, the more it is likely ployed. as a fire extinguishingrnedium, possesses .to spread and the higher the temperature of the S h a h va ro s ure-that it is notdesirinvolved materials and surrounding objects. As a to s je oselin s t h me f rny it requires a certain amount or carbon dioxide, longer-period ofntime than, is absolutely neces- ,properly, applied, toextinguish a fire of a given ryo e p e, it u d be veryldfistrllctive size and intensity, or temperature, the time lost to a e line to maintain it at all times in op n by an operator in traveling back and forth bec mu ic tion wi e sto e s e e tween "the nozzle end of the hose line and a liquidv carbon dioxide and rely solely. on a valve vvalve 3 t y l may mean the difference at the. outer end of the hose linefor controlling tween ificient and an insufficient amount of the p ds rm Furthermwe, if the carbon dioxide to effect'complete extinguishhose line is of substantial lengthandis normallv q nu In any event, such a procedure creates Wollrld-v n reel, a ta ble j nt 'must' be emconsiderable excitementand confusion at a time .ployed.atso1ne point between the reel and the wh cool thinking and deliberate action are fixedsu-pply pipe for the extinguishing medium. vessential. 1 Y .A diflicult maintenance problemis presented if If carbon dioxide,:confined at a vapor pressure vibis necessary to keebfsuch a joint lea pr of of; several hundred ounde ersquare inch,.1's while constantly; subjecting the same to the three discharged from the end of-a hose line which is hundred, or'more, pounds per square inch presnot firmly held by at leastwone rather stocky sure of the liquid carbon dioxide for an indefinite individual, the hose with its heavy discharge lengthof time. 1 nozzle will whip and thrash around in such a It would appear tq-be a very simple matter violent manner as to be l-ikely'to cause serious 'to solve thenabove noted diiiiculties by merely injury to anyone trying to recapture the same. providing a manualvalve in 'the'supply pipe in Also considerable valuable time and carbon diadvance of'the rotary-joint for thejhose reel and oxide Will be lost. It is apparent, therefore, that 'openingthis'valve before placing the-hose 1ine 'need for the operator ofa carbon dioxide hose [5 to the supply pipe l6. include any desired couplings, etc, to properly line to return to a main valve, located at the hose reel, to open the same after the hose has been run out may have disastrous results.

It is the primary object of this invention to provide a hose line type of discharge apparatus for high pressure fire extinguishing liquids in which the hose line will not be subject to the pressure of the liquid except when in actual service, and in which the operator will be prevented from removing the hose line and its discharge nozzle from the carrier mechanism without first placing the hose line in communication with the source of supply of the extinguishing medium.

A further important object of the invention is to provide holding means for the discharge nozzle of a hose line which must be manipulated to release the nozzle for use and to replace the nozzle after use, and wherein such manipulations of the holding means will result in turning on and off the supply of fire extinguishing medium to the hose line.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designatelike parts throughout the same,

Figure 1 is a side elevational view of fire extinguishing apparatus including a hose line wound on a reel, supporting and'holding means for the discharge nozzleat the outer end of the hose line, and valve mechanism for controlling the delivery of the extinguishing medium to the hose line, 7

Figure 2 is an elevational view of the mechanism shown in Fig. l and taken at right angles to this latter figure,

Figure 3 is a detail front elevational view of the holding mechanism for the hose line discharge; nozzle and pilot valve mechanism which is associated therewith,

Figure 4 is a detail .top plan View of the structure shown in Fig. 3, 1

Figure 5 is a longitudinal discharge nozzle to the outer end of the hose line, and the control valve that is incorporated in said pla -pipe,

Figure 6 is a longitudinal sectional view of the.

pressure controlled and operated main valve which functions to control the flow of the extinguishing medium to the hose line,

Figure '7 is a detailelevational view of the pilot .valve structure whichis associated with the hose line nozzle holding mechanism of Figs. 3 and 4, and

Figure 8 is a sectional view of the pilot valve,

taken on line 8 -8 of Fig. 7.

In the drawings, wherein for the purpose of illustration is shown'the preferred embodiment of this invention, and first particularly referring connected at its inner end to the formed pipe Ma,

which in turn-is connectedto the pipe section 13. The laterally projecting end portion of this pipe section is connected by a swivel or rotary joint This supply pipe may sectional viewof a; portion of the fplay-pipe, which connects the The mounting associate the same with the mounting of the hose reel II and the location of the source of supply of the fire extinguishing medium, such as liquid carbon dioxide, which is under a considerable pressure head.' A main control valve I1 is coupled in the supply pipe l6 and functions to control the'supply of the extinguishing medium to the hose line 14.

Suitably coupled to the outer end of the hose line H, as at I8, is a play-pipe 19 which has suitably connected to its outer end the discharge nozzle 20. The play-pipe I9 is formed of two rigid metal pipe sections which are covered with suitable insulation so that they may be safely held in the hands of. the operator, to enable him to direct the discharge of low temperature carbon dioxide from the nozzle 20. A secondary control valve 2| is suitably connected to the adjacent ends of the two sections of the "play-pipe l9 and is intended to be manually operated to control the discharge of the extinguishing medium from the nozzle 2|).

A suitable nozzle supporting platform or shelf 22 is arrangedrelative to the hose reel H to accommodate the nozzle 20 in the manner clearly illustrated in Figs. 1 and 2. For the purpose of retaining the discharge nozzle 20 and the playpipe l9 in its intended position with respect to the platform or shelf 22, a holding device 23 is provided. This holding device 23 must be manipulated to release the discharge nozzle and its play-pipe so that the hose line I4 may be run out or pulled off of the reel I I when the apparatus is to be used to extinguish a fire. The holding mechanism, also, must be manipulated to secure the discharge nozzle 20 and play-pipe IS in their intended positions with respect to the supporting platform or shelf 22 when the hose line H is returned to the reel ll after use of the apparatus.

The manipulation of the holding mechanism 23 to release and. secure the discharge nozzle 20 and play-pipe l9 result in operating a pilot valve 24. This pilot valve is connected to the vapor or liquid supply tubing 25 and the vapor or liquid pressure delivery tubing 26. This latter tubing extends to the main control valve l1. The above description outlines in a general way the principal instrumentalities which are incorporated in this fire extinguishing discharge apparatus. When it is desired to employ the hose line apparatus to extinguish a fire, the nozzle holding mechanism 23 is manipulated to release the nozzle, and its play-pipe so that the hose line can be pulled off of the reel ll. This manipulation of the holding mechanism 23 results in operating the pilot valve 24 for venting to the atmosphere thevapor or fluid pressure which is normally maintained in the length of tubing 28. The venting of the vapor or fluid pressure from this tubing results in opening of the main control valve I! so that the fire extinguishing medium will flow into the hose line I4 in readiness for use when the operator of the nozzle reaches the scene of the fire. The fire extinguishing medium will not be discharged from the nozzle 20 until the operator opens the secondary control valve 2|. This secondary control valve may be opened and closed as many times as the operator desires in his manipulation of the hose line.

When the fire is extinguished and the hose line H is again wound up on the reel I I, the operator will return the nozzle 28 and the play-pipe l9 to their supporting platform or shelf 22 and the holding mechanism 23 will be manipulated to fasten thenozzle and play-pipe in place against accidental or=unintentional removal. This manipulation of the holding mechanism 23 to secure the discharge nozzle'will bring about'operation of the pilot valve 24 for'ireestablishing communication between the supply tubing 25 and the delivery tubing 26 andfor-disconnecting the latter tubing from the atmosphere.

Although this fire extinguishing apparatus is primarily intended for use with such an extinguishing medium as carbon dioxide, it is to be understood that-the apparatus may be employed for discharging other extinguishing substances, such as water; When this apparatus is employed for discharging carbon dioxide, the supply tubing 25 is preferably connected to the vapor. space of the carbon dioxide storagemeans. If the-discharge apparatus is employed for controlling the release of some otherfire extinguishing'medium, maintained under relativelyhigh pressure, the supply tubing 25 willbe connected to the high pressure liquid supply, or some other fluid pressure medium. 3 Y

Although the hose line H! is illustrated as be: ing wound on the meal I I, it is to be understood that other conventional types of hose supports or carriers may be employed if desired. Without intending in any way to limit the application or use of this extinguishing-apparatus, it will be noted that Figs. 1 and 2 illustrate the apparatus as being associated With-8. mobile fire fighting unit. The mounts ID for the hose reel are specifically illustrated in Fig. 1 as. being supported by the side chassis'bar 2'! of such a mobile unit while the nozzle supporting platform or shelf 22 specifically takes the form of the step or running board of'the'mobile unit. It readily'will be appreciated; however, that this discharge apparatus can just as well be mounted on the rear end of a mobile unit or even associated with a Vertical wall or column of a building.

The detail structural features of the various instrumentalities which are generally illustrated in Figs. land 2 are shown in the remaining figures of the drawings. now will be employed in presenting detaileddescriptions of the said instrumentalities.

Fig. 6 illustrates the details of the main control valve IT. This control valve includes the main body portion 28 with its inlet 29 and outlet 30; A partition 3i separates the inlet and the outlet of the valve body; and'is provided with an opening SZ-that is surrounded by the valve seat 33.

body is provided with an: internally threaded opening 34 that is adapted to receive and be threadedly connected tothe cap- 35. Asealing gasket 36 functions to prevent-leakage between the valve body 28 and the .cap 35. This cap is of hollow construction to provide an internal cylin der 3'! to receive the combined piston and valve These remaining figures On the inlet side of the partition 3!, the valve 7 body 38 and to form a pressure chamber 39 above the piston portion of the element 33. The cap is further provided with an internally threaded opening 40 for connection with the outer end of the fluid delivery tubing ZE -see Figs. 1 and 2. The cap is further provided with a depression or recess 4| that functions to seat the upper end of the valve body loading spring'AZh The lower portion of the combined piston and valve body member 38 is provided with a. suitable seating disc 43 which is adapted to engage the valve seat 33 when the valve is closed. This seating disc is held in place by the retainer 44 that-is secured to .the combined piston and valve body 38 bythe threaded stem and nut assem;- bly 45. v v The said body 38 is recessed at 46 to accommodate the lower portion ofthe loading spring .42.

. The upper'portion of the combined piston: and valvebody 38 is reduced in diameter to accommodate the cup leather 4'!- that is reinforced or backed up by the resilient expander 48. -This expander includes a plurality of curved spring fingers whichunderlie the cylinder wall engaging portion of the cup leather 4?. Overlying the secured portion of the cup leather is a retaining ring 49 while;a resilient shock absorber and sealing ring50 overlies the retainer ring. These various packing elements 41 to 50 inclusive aresecured to-the combined piston and valve body 38 by a suitable number of screws 5 I.

. When this valve is properly connected up to control the flow of the high pressure extinguish.- ing medium to the hose line l4, the liquid carbon dioxide, or the like, fills the portion of the valve body 28 above the partition 3!, or on the inlet sideof this partition. The exposed lower portion of the combined piston andvalve body 38;

therefore-is subjected to this fiuid'pr essure. 5 The supply and delivery tubes 25-.and 25 apply carbon dioxide vapor pressure to theupper. surfacestof the bodyi iil as a result of the development of the vapor pressure in the chamber 33. This vapor pressure, which is equal to the liquid pressure in the inlet portion of the valve body 23 plus [the load imposed upon the combined piston and valve body .38, hold the seatingv disc 43 of the "valve tightly engaging the seat33. When thepilot valve 24 is actuated to vent the deliverytubing 26. to the atmosphere, thepressure in the pressure chamber 39 is relieved and the combine'd piston and Valve body 38 is then only loaded by the spring, 42. The liquidqpressure applied to the exposedbottom face of the valve bodyv 38 will then be greater than the force of the spring 42 and this fluid pressure will cause the valve to beunseated to permit flow of liquid carbon dioxide from the inlet end .29 to the outletv end 30 of the valvev body 28. .When the pilot valve is again operatedto interconnect the supply tubin 25 and the delivery tubing 26 and to close on" the opening to the atmosphere, vapor. pressure will againdevelopin, the pressure chamber 39. When the vapor pressure in chamber 3?! equals the pressure in the inlet of the valve body 28, the combined piston and valve body 33 will be moved by the spring 42 to place the seating disc 43 in sealing engagement with the seat 33..

y The pilot valve structure is illustrated in. Figs. Wand 8. This pilot valve includes a body portion 52 which is provided with a pair of mounting. aoertured ears 53. with a chamber 5. that communicate with .a reduced extension 55 having a venting port. 56 f rmed therein by means of which the chamber extension 55 may discharge to the atmosphere. A11 annular valve seat 5'! surrounds the area of cemmunication between the chamber 54 and the reduced chamberextension v A lateral connection opening is formed in the; pilot valve body 52 for connection withthe end of the fluid pressure delivery tubing 2%. In

other words, this pilot valve opening 53 is placed in communication with theopening til in the :cap of the main control valve, see Fig. egey means of the pressure delivery tubing 25.

The pilot valve body chamber fa l is internally screw threaded at its open end 59 for connec- Thisvalve body is prOvided tion-"With or to receive the reducedend' portion 69 of the cap 6|. This cap is formed with an opening 62 which is internally screw threaded for connection with the end of the'delivery tubing 25 that extends from the source of supply of. the fluid pressure. The cap 6! is additionally bored at 63 for communication with the chamber 54 of the pilot valve body 52. A valve seat 64 seat surrounds the inner end of the boredportion 63 of the cap. p

A double ended plunger 65 is located in the chamber 54 of the pilot valve'body 52 and is adapted to alternately-engage the valve seats 51 and 64. A spring 66 normally functions to cause theplunger 65 to engage the valve seat 51. A

plunger rod 61 projects from the mounting end of the pilot valve body 52. When proper force is applied to this plunger stem 61, the spring 66 will be overcome and the plunger will be moved out of engagement with the seat 51 and into engagement with the seat 64.

v Fig. 8 discloses the plungerbody in its normal position. When in this position, the supply tubing 25 is placed in communication with the delivery tubing 26 so that fluid pressure will pass through the pilot valvev body 52 from the source or supply to the pressure chamber 39 of the main control valve 11; Seating of the plunger 65 against the annular seat 51 closes off the chamber 54 from'the ventport or opening 56. When the plunger 65'is moved into engagement with the annular seat 64, the supply tubing 25 is disconnected from the'delivery' tubing 26 and the fluid pressure developed in the chamber 39 of the main control valve I1 is vented through the tubing 26 into the chamber 54 of the pilot valve body and from this chamber into the chamberextension 55 and then through the port 56 to the atmosphere. Figs. 3 and 4 disclose the holding mechanism for the play-pipe l9 and the discharge nozzle 29. This holding mechanism 23 includes a bracket 68 that is suitably secured at itsinner end 69 to any appropriate support 10. Figs. 1 and 2 disclose this support 10 as being the inner guard plate forthe step or running board 22.

The outer ,end of the bracket 68 is notched at 1| to receive the play-pipe l9." A combined locking plate and pilot valve operatinghandle 12 is secured at 13 to the rock shaft 14 that extends lengthwise through the bracket 68. A stop or keeper 15 is secured to the outer end of the bracket Won the opposite side of the notch 1|. When the combined locking plate and handle 12 is in'the full line position of Figs. 3 and 4, the play-pipe receiving notch. 1| is uncovered and the play-pipe may be moved into and out of the same. When the locking plate and handle 12 is swung into a position where it will engage the keeper or stop plate 15, the entrance to the notch 1! will be closed and the play-pipe' l9 will be locked or held therein.

The rock shaft 14 projects beyond the support 18 at the inner end of the bracket 68. Secured to the inner projecting end of this rock shaft is a rocker arm 16. This rocker arm is illustrated'in Fig. 3 as having an over-travel, spring pressed, relief plunger 11 mounted in a recess 18 thereof. The pilot valve 24 is illustrated in Figs. 3 and 4 as being supported on the mounting member 10 in such a manner as to have the plunger 11 line up with and engage the plunger stem 61 thereof when the combined locking plate and handle 12 is arranged in its unlocking or partition 85.

playr-pipe releasing position. This position is shown in full lines in Figs. 3 and 4.

The rocker arm 16 is provided with a pin or post 19. This pin or post is carried by the free end portion of the rocker arm 16. A snap pring 80 is connected to this pin or post 19 at one end and to a fixed pin or post 8| at, its other end. It will be seen that this snap spring 86 will function to load the rocker arm 16 so that its overtravel relief plunger 11 will engage the pilot valve plunger stem 61 and will apply suificient force to the latter to move the pilot valve plunger 65 off of its seat 51 into engagement with its seat 64. Therefore, when the combined locking plate and handle 12 is moved into the full line position illustrated in Figs. 3 and 4, the "play-pipe I9 is released and the pilot valve 24 is operated for venting the pressure chamber 39 of the main control valve I1 to the atmosphere. Due to the spring mounting of the relief plunger 11 of the rocker arm 16, the snap spring 80 will be prevented from applying sufficient force to the pilot plunger 65 to damage the same when it engages the seat 64.

Fig. 3 illustrates th combined locking plate and handle 12, by means of dot and dash lines, in its intermediate position where the snap spring connected pin or post 19 is on a dead center with the rock shaft 14, which'mounts the rocker arm 16, and the fixed pin or post 8! of the spring 80. When this spring connecting pin or post 19 moves past this dead center position in either direction, the tension of the snap spring 80 will function to move the combined locking plate and handle 12 into one of its extreme positions; i. e., either into its locking position in engagement with the keeper or stop 15 or into its pilot valve operating position as is shown in full lines in Figs. 3 and 4'. Therefore, the operator who actuates the combined locking plate and handle 12 for either releasing or securing the play-pipe I9 is not relied upon to move the member 12 fully into either of its extreme positions.

The manual play-pipe valve 2| is illustrated in detail in Fig. 5. This valve includes a body 82 that has an inlet end 83 and an outlet end 84. A partition 85 separates the inlet and outlet portions of the interior of the valve body. This partition is provided with an opening 86 that is surrounded at one side by the valve seat 81. The valve body 82 is shaped on the inlet side of the partition 85 so as to form a cylinder 88 in which is movably mounted the combined valve and piston body 89. A removable cap 90 is employed for closing the outer end of the cylinder 89. This cap is held in place by means of the clamping ring or nut 9| which is threadedly connected to the valve body cylinder portion 88.

The valve portion of the combined valve and piston body 89 is provided with a seating ring 92 that is adapted to engage the seat 81 of the A ribbed nut 93 is employed for holding the seating ring or disc 92 in place on the body 89 and also functions to guide the movements of the combined valve and piston body 89 by engaging the wall of the partition opening 86. The ribbed construction of this nut 93 allows for the passage of the controlled fluid as soon as the seating disc or ring 92 has been moved away from the partition seat 81.

The piston portion of the combined valve and piston body 89 is formed with an annular recess or pocket 94 that opens through the end of the body 89 and functions toreceive the adjacent end portion of the spring 95. The remaining end of thisspring; bears against theremovable; cap :90: A small .port: 96 is formed in. the :spistoni portion. of the-combinedtva'lve andxpiston body; 89 and. functionsto place :the; pressure chamber 91 in. open communicationzwith theyinletzsideofi.

the valve body 82. It .Will be seen, therefora that; the fluid pressure. developed in thecylinder cham.-. ber 91, as aresult. offlow of. fluid-fromxtheinlet: play-pipe section, and they spring. Sid-will main.-

tain the ring or disc. 92. in engagement with the 10.

partition, seat: 81 when thezvalve: iscloseds.

The combined valve and; piston. body... 89 is. formed with-an axial passage98 which accommoe dates the bodyorstem ofthe .pilotva'lve 09. This.

pilot valve: is iormed with-ahead I00: which:.is

adaptedto' seat'atone-send's of thepassage 98." A; spring. I01 normallyz retains. thispilot valvehead I 00 seated;

operating plunger I02. engages theupper end'of the pilot valve.body 99.. This plungeris 20.

portion I09 ofthepilot valve operating lever I05 30.

is so angularlyarranged, that. it willfiatly-bear against the play-pipe? I9 when moved into its dot'and dashiline position. When-in this position, thesecondary control .valve 23I1w-illbe open to; allow the fire extinguishing fluid to new through the play-pipe?" to the discharge nozzle 20.

The operation of this fpla-y-pipe. control valve will now be explained;

It' was pointedout.-.ab'ove that the bleeder port 06,.formed" in the piston-portion of the body-89, will allow fluid-pressure to develop inthe cylinder pressure chamber '9'! and this fluid pressure plus the: spring. 95. will maintainthe seating disc or ring 92in 'engagement'with the partition seat 81.

When theoperator desires to open this play-- pipe}? orsecondary control; valve the operating lever: i'05iis'moved from'its'full lineposition into itsdot and dash lineiposition- This pivotal movement of the lever will depress the plunger I 02' and 50 cause. the pilot valve head I00 to be'unseated against the pressure of its spring I0I'. Unseating of the pilot valve resultsinemptying the fluid from the pressure chamber 91' at a more rapid rate than it canbe developed asa result of flow of fluid throughthe vent opening or port 96. The; pressure in the' chamber 9Tthen drops to such a value; that the -fluidpressure in theinlet' side of theivalvecasingor body 82 will force the main valve awayrfrom. the partition seat 81 topermit the fluid. to*fiow. through. the: partitionopening 80. When the-operatordesiresito close this valve 2|, the:lever I05 .isreleased and the spn'ngIBI returns thecpilottvalvehead I001to its seat to closethedischarge port orpassage 98.

formed in the combinedtvalve and piston body. 89. Fluid pressure then buildsup. in the pressure. chamber 91 andwhen'. this fluid pressure equals the fluid pressure in the inlet side of the valve casing 82 the spring 95 will move the seating disc or ring 92 into engagement with the partition seat 81.

To briefly review the entire fire extinguishing mechanism, it will be seen that an operator will not be allowed to release the discharge nozzle 20 A slotted lever 25.

and its play-pipe I9 from the holdingimeans 23. andpull the hose-line-.l4 015E. of its supporting reel II without effecting. operation of themain. control valve I! so thatthetextinguishing medium willfill the hose line-I4.- However, the extinguishing medium willnot .be discharged through the nozzle'20 as a. result-of opening. the main control valve IT. This discharge ofthe. extinguishing fluid will only result frommanual operation of the control lever I05 for'the secondary or play-pipe control valve 2i. This secondary or play -pipe*control Valve: additionally will only remain open'so long as the operator. retains the handle portion I09 of the lever I05 in its depressed position. Therefore, if. the operator releases his hold on the play-pipe I9..and the lever I05 of the secondarycontrol valve, this; valve will close and the extinguishingmedium. will not be discharged Ifrom the nozzle .20-tocause. the end of the hose line to whip and thrash around in such a violent manner; as to-cause. severe injury to anyone trying to. recapture. thesame.

It is to be understood that-the form. of this. invention herewith shown and described is to be. taken as the preferred example ofethe same, and. that various changes inthe shape,size, and ar rangementoflparts may beresortedito without. departing from. the spirit of; the. invention or the scope of the subjoinedclaims.

Having thus described th invention, I claim:.

1; Fire extinguisher discharge apparatus. com--v prising a supply pipe for. the extinguisher me dium, a control valvein said supplypipe, a hose.

line, having a. dischargedevice at itsouter end;

effecting opening and closing; operationssof' the control valve.

2. Fire extinguisherdischarge apparatus com-- prising-a supply pipe forthe extinguisher me-.- dium, a difierential. fluid pressure J operated :con.-- trol valve in said supply pipe, .a. hoseline, having, a;discharge device. at .its outenend; connectedf t0.-: thgsupply pipe; means. for releasably. supporting; and holding. the discharge. device; and means. actuated by operation of theholdihg p0rti0n11of thefi'rst mentioned means; inreleasingand secur+ ing the discharge. device;, for. effecting opening; and L closing operations, respectively;v of .thexcone troLvalve-by properly changing the. difierentiali pressurecondition of I the control valve.

3. Fire extinguisher discharge.apparatus.comprising a supply pipe for the extinguisher me.- dium, a- I differential fluid pressure operated con- 1 trol valve in said supply pipe, ahose line, having" a discharge device'at its outer end; connected" to the supply pipe; means forreleasably support ing] and holding the dischargedevice including. a member movable into discharge I device .relase ing. and securing positions, and means actuated by said movements of the movable member for efiecting opening and closing operations of the control valve by properly changing the differential pressure condition of the control valve.

4. Fire extinguisher discharge apparatus comprising a supply pipe for the extinguisher medium, a differential fluid pressure operated 'control valve in said supply pipe, a hoseline, having a discharge device at its outer end, connected to the supply pipe, means-for releasably supporting and holding the dischargedevice, and a pilot valve actuated by operation of the holding portion of the first mentioned means, in releasing and securing the discharge device, for effecting operation of the control valve by properly changing the differential pressure condition of the control valve.

5. Fire extinguisher discharge apparatus.comprising a supply pipe for the extinguisher medium, a differential fluid pressure operated controlvalve in saidsupply pipe, a hose line, having adischarge device at its outer end, connected to the supply pipe, means for releasably supporting and-holding the discharge device including a member movable into discharge device releasing and securing positions, and means actuated by operation of the holding portion of the first mentioned means,in releasing and securing the discharge device, for efiecting opening and closing operations, respectively, of the control valve by properly changing the differential pressure condition of the control valve.

6. Fire extinguisher-discharge apparatus comprising a supply pipe for the extinguisher medium; a control valve in said supply pipe, a hose line, having a discharge device at its outer end, connected to the supply pipe, means for releasably supporting and holding the discharge device including a member movable into discharge device releasing andsecuring positions, a spring device adapted to snap past its dead center position'in either direction for assuring full movement of the said movable member into and for holding it in its discharge device releasing andsecuring'positions, and means actuated by said movements of the movable member for effecting opening and closing operations of the control valve. I v

' 7,-Fire extinguisher dischargeapparatus comprising a supply pipe for the-extinguisher medium, a differential fluid pressure operated-control valve in said supply pipe, a hose line, having a dischargedevice at its outer end, connected to the supply pipe, means for releasably supporting andholdingthe discharge device including a member movable into discharge device releasing and securing positions, a spring device adapted to snap pastits dead center position in either direction for assuring full movement of said movable member into and .for holdingit in its discharge device releasing and securing positions, andrmeans actuated by said movements of ,the movable member for effecting opening and closing operations of thecontrol valve by properly changing the, differential pressure condition of the control valve.

,8. Fire extinguisher discharge apparatus comprising a supply pipe for the extinguisher medium, a diilerential fluid pressure operated control valve in said supply pipe, a hose line, having a discharge device at its outer end, connected to the supply pipe, means for releasably supporting and holding the discharge device including a member movable into discharge device releas ing and securing positions, a spring device adapted to snap past its dead center position in either direction for assuring full movement of the said movable member into and for holding it in its discharge device releasing and securing positions, and a pilot valve actuated by operation of the movable member, in releasing and securing the discharge device, for effecting operation of the control valve by properly changing the difierential pressure condition of the control valve.

9. Fire extinguisher discharge apparatus comprising a fixed supply pipe for the extinguisher medium, a control valve in said supply pipe, a discharge nozzle, means for connecting the discharge nozzle to the fixed supply pipe to permit the nozzle to be moved from a non-fire extinguishing position to a fire extinguishing position, means for releasably holding the nozzle in its non-fire extinguishing position including a pivoted locking plate movable into releasing and securing positions, and means actuated by said prising a fixed supply pipe for the extinguisher medium, a fluid pressure operated control valve in said supply pipe, a discharge nozzle, means for connecting the discharge nozzle to the fixed supply pipe to permit the nozzle to be moved from a non-fire extinguishing position to a fire extinguishing position, means for releasably hold-- ing the nozzle in its non-fire extinguishing position, and fluid pressure flow controlling means actuated by operation of the holding means, in releasing and securing the discharge nozzle, for efiecting opening and closing operations, respectively, of the control valve.

11. Fire extinguisher discharge apparatus comprising a fixed supply pipe for the extinguisher medium, a fluid pressure operated control valve in said supply pipe, a discharge nozzle, means for connecting the discharge nozzle to the fixed supply plpe to permit the nozzle to be moved from a non-fire extinguishing position to a fire extlnguishing position, means for releasably holding the nozzle in its non-fire extinguishing position, and a fluid pressure flow controlling pilot valve actuated by operation of the holding means for the nozzle, in releasing and securing the nozzle, for efiecting opening and closing operations of the control valve.

12. Fire extinguisher discharge apparatus comprising a supply pipe for the extinguisher medium, a control valve in said supply pipe, a reel having its shaft connected to the supply pipe, a hose line adapted to be wound on the reel and having its inner end connected to the reel shaft, a play-pipe having a discharge nozzle at its i outer end connected to the outer end of the hose line, a support for the play-pipe and discharge nozzle independent of the hose reel, a pivoted locking plate for releasably securing the playp1peand discharge nozzle to the support, and

means operated by actuation of the said pivoted locking plate for efiecting opening and closing of the control valve.

HILDING V. WILLIAMSON.

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