US1287800A - Automatic fire-extinguishing apparatus. - Google Patents

Description

E. L THOMPSON.

AUTOMATIC FIRE EXTINGUISHING APPARATUS.

APPLICATION mm an. n. 1914.

1,287,800. Patented Dec. 17, 1918.

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UNITED STATES PATENT OFFICE.

EVERETT L. THOMPSON, 0]? DOVER, NEW JERSEY, ASSIGNOR TO SYPHO-CHEMICAL SPRINKLER CORPORATION, OF CROTON-ON-HUDSON, NEW YORK, A CORPORATION OF NEW YORK.

AUTOMATIC FIRE-EXTINGUISHING APPARATUS.

Application filed April 17, 1914.

To all whom it may concern:

Be it known that I, EVERETT L. THOMPSON, a citizen of the United States, and resident of Dover, Morris county, State of New Jersey, have made a certain new and useful In vention Relating to Automatic Fire-Extinguishing Apparatus, of which the following is a specification, takenin connection with the accompanying drawing, which forms part of the same.

This invention relates especially to automatic fire extinguishing apparatus in which the distributing system may comprise automatic sprinkler heads, hose connections or other distributing devices and is preferably provided with a priming or actuating tank which together with the distributing system itself may normally contain Water or other non-freezing extinguishing liquid for low temperature work. Under emergency conditions additional extinguishing liquid may be supplied to the distributing system by any suitable liquid supply, such as an automatic chemical supply tank which may have its chemical mixing devices located within the tank itself if desired so as to Supply the extinguishing liquid under high pressure through a supply connection between the tank and the distributing system which preferably has a check valve and may also be provided with an automatically closing venting drain device located between two check valves or the like. By providing suitable connection between the upper part of the distributing system or actuating tank and the chemical supply tank or supply connection therefrom the suction or pressure I reduction automatically caused under emergency conditions of the system may actuate the chemical mixing devices, and if desired additional supplies of extinguishing liquid may be furnished to the distributing system by a steamer connection or other non-automatic supplemental liquid supply communicating with the system through a suitable check valve or the like.

The accompanying drawing shows in a somewhatdiagrammatic way illustrative embodiments of this invention in elevation, parts being shown in section to more clearly indicate their construction.

The distributing system may be of any desired type and may as indicatedcomprise one or more risers or supply pipes 1 to which.-

Specification of Letters Patent.

Patented Dec. 1'7, 1918. Serial No. 832,518.

may be connected various distributing pipes such as 2, on which automatic sprinkler heads or distributing devices 3 may be arranged at suitable intervals and the system may also comprise other distributing devices such as the hose connection 5 to which hose lines may be connected and operated when the valve 4 is opened. A suitable actuating or priming supply tank may in many cases be connected to any suitable part of the distributing system when a wet pipe type of distributing system is used so as to normally maintain the desired amount of extinguishing liquid in the system. The actuating tank is preferably in any case large enough to supply the liquid required to compensate for any slight accidental leakage in the system and also in many cases may with advantage be of sufficient capacity to furnish an initial supply of extinguishing liquid when the system first gets into action in the event of fire for which purpose it is.sometimes desirable to have this supply tank initially under considerable air pressure where a more forcible discharge of the extin uishing liquid is desired. The desired hea may however, be readily secured by the action 0 gravity when the upper part of the distributing system with or without the actuating or priming supply tank, such as 6, is carried up suiiiciently beyond the distributing devices and in such an arrangement as is diagrammatically illustrated in the drawing it is usually desirable to provide in connection with'the top of the tank or adjacent parts of the distributing system a suitably reduced venting device normally having a pin hole or reduced venting passage for the slow escape or ingress of air caused by ordinary temperature changes, and so forth. The venting passage 8 may be used in this connection and may be controlled by the venting valve 9 preferably of the needle valve type so as to be normally entirely shut or preferably nearly closed to give the desired normal reduced venting passage and which may be readily opened to allow the more free venting of air through the venting passage 8 when filling the actuating tank and other parts of the distributing system in the first place with the water or other aqueous extinguishing liquid 7 such as a suitable solution of soluble and substantially inert salts to reduce the freeaing point of the liquid for low temperature work which should preferably be so selected as to be substantially inert or neutral to the other extinguishing liquids employed in connection with the system.

Under emergency conditions when one or more of the automatic sprinkler heads open or when the other distributin devices are brought into play the cxtinguishin liquid in the system is instantly available for putting out the fire and the discharge of this liquid involves the withdrawal of liquid from the substantially closed upper portion of the distributing system which may include the actuating tank so as to cause a decided pressure reduction or suction therein. Any suitable emergency devices may be used in connection with the actuating tank or connected parts for automatically supplying additional extinguishing liquid to the system or for alarm purposes or both, and these emergency devices may be located at any convenient point and may be connected with the actuating tank or connected parts in which the pressure reduction takes place in any suitable way, as for instance, by the suitable actuating or suction connection or pipe 10 which is preferably connected to the distributing system above the normal liquid level therein so that the air or other fluid in this suction connection more readily transmits the suction or pressure impulse.

Any supplemental fluid supply for the distributing system, such as any pressure actuated automatic supplemental liquid supply may be used to supply additional extinguishing fluid under emergency conditions. A chemical pressure actuated arrangement is shown in the drawing as comprising a chemical supply tank 10 which may be connected with the distributing system in any suitable way, this supply connection being preferably thou 11 not necessarily of an automatic ventin c aracter so as to prevent or minimize mixture of the liquid in the distributing system and the liquid used in the chemical supply tank. The supply connection 11 may be used with advantage to connect the chemical or other press sure operated supply tank with the cooperating distributing system and may comprise any suitable cut-off or check valve such as 13, between the distributing system and supply tank and may also if desired comprise any suitable automatic venting drain device between the valve and tank. As indicated this venting device 31 may comprise the ball drip casing 35 in which the ball valve 14 may normally rest in a suitable seat or repression between the stop pin 34 and the conical valve seat 15 so as to normally leave free the venting opening 36 for the escape of air or other material. Under emergency conditions, however, when fluid is discharged in considerable quantities the ball valve 14: is thereby carried against the seat 15 tightly closing this small drip opening which for clearness is shown considerably enlarged. It is usually desirable where such a venting or drain device is used in the supply connection between the distributing sys tem and the point where the suction connection communicates with the supply connection or with the connected supply tank, to have one or more suitable cut-off valve devices controlling the communication between the venting device and the connection with the tankanddistributing system. The supply connection may have a depending portion, such as 18, extending within the supply tank, so that its receiving end .19 is adjacent the bottom of the tank where if desired it may be provided with a suitable strainer, such as 19, of wire gauze or the like. If desired also a pin hole or reduced equalizing aperture may be formed in the supply connection inside the tank and preferably adjacent the top of the air space therein so as to allow for the equalizing fiow of any air or gases from time to time to compensate for temperature changes without interfering with the emergency action of the apparatus. For this purpose the pipe 20 may communicate with the supply connection adjacent the top of the tank and be provided with a diaphragm or the like 21 in which the pin hole or reduced equalizing aperture 22 may be formed, thus allowing a reduced opening between the air space of the supply tank and the supply connection. Any suitable chemical mixing devices may be used in connection with the supply tank and the actuating members controlling these mixing devices are preferably located within the tank itself as generally indicated in the Cooney Patents 1,075,015. 1,075,017 and 1,075,018 of October 7, 1913. These actuating members within the tank may comprise the actuating piston mounted within the cylinder 17 communicating with or forming part of the supplying connection so that the piston is drawn toward the end of this cylinder when suction occurs in the supply connection above and thus leave a substantially free passage for the liquid up the extension 18 and into the supply connection 11 toward the distributing system. The suction connection or pipe 10 may be conveniently connected to the cylinder l'i' or to the supply connection 11 at any convenient point so that under emergency conditions the suction or pressure reduction caused by the withdrawal of liquid from the upper part of the distributing system at once c'auses'a corresponding suction or pressure reduction on the piston 23 within the cylinder 17 so as to cause its emergency operation and effect the actuation of the pressure generating ele ments. One or more check valves or cutofl' devices such as 12 should for most efi'ed communicates with tive operation be interposed in the supply connection between the distributing system and the point where the suction connection the supply connection so as to prevent any flow from the distribut ing system reducing its suction or actuating impulse. The supply tank may contain a charge 29 of suitable carbonate liquid and the mixing devices may comprise thtipping acid container 26 carrying the charge 27 of strong sulfuric acid or the like and mounted by its trunnions 28 in the support 30 so that it normally tends to overturn when the actuatin stem 24connected to the piston 23 is with rawn from the socket or member 25 on the container.-

It is also desirable to arrange for a further supply of extinguishing liquid to the distributing system and it is advantageous to provide a suitable non-automatic supplemental liquid supply, such as a steamer connection preferably extending outside of the building so that 'steam fire engines may con la their hose lines thereto and pump additional supplies of water into the dis tributing system in the event of fire. Such a steamer connection is shown as comprising the non-automatic supply connection and the two communicating hose connections 32 communicating with the distributing system throu h the automatic check or cut-ofl valve 33 which prevents loss of extinguishing liquid in the system through this connection while instantly allowing any additional supplies of liquid to be pumped therethro g nto the distributing system.

This invention has been described in connection with a number of illustrative embodiments, forms,-elements, materials, parts and arrangements, to the details of which disclosure the invention is not of course to be limited, since what is claimed as new and what is desired to be secured by Letters Patent is set forth in the appended claims which are of a somewhat limited character in view of the fact that broader claims to the use of an actuating tank or other substantially closed upper portion of a distributing system and the connected suction or actuating connection therewith are made in other applications such as Serial Nos. 799,840, filed November 8, 1913, 814,032 and 814,033, filed January 24, 1914.

What is claimed is:

1. In automatic fire extinguishing apparatus, a distributing system normally charged with non-freezing extinguishing liquid and comprising automatic distributing devices including automatic sprinkler heads and hose connections, an actuating supply tinguishing liquid and connected to the upper part of said distributing system. a reduced area venting device connected to the upper part of said distributing system, the

' an automatic supplemental fluid supply tank containing a charge of said exupper part of said distigbuting system being substantially losed uni er emergency conditions to permit a pressurechan'ge te take place therein on the emergency operation of the system, anyautomatic supplemental fluid supply for said distributing system comprising a chemical supply tank, a supply connection between said chemical supply tank and said distributing system to supply additional extinguishing liquid thereto, chemical mixing devices cooperating with said supply tankand comprising a tipping acid container and actuating members comprising an actuating plston arranged in a cylinder formed in said supply connection and located within said tank, a suction connection between the air space in the upper part of said distributing system and said supply connection adjacent said chemical supply tank and a check valve cut-ofi' device in said supply connection between said suction connection and said distributing system.

2. In automatic fire extinguishing apparatus, a distributing system normally charged with nonfreezing extinguishing liquid and comprising automatic distribut ing devices including automatic sprinkler heads, an actuating supplytank containing a charge of said extinguishing liquid and connected to the upper part of said distributing system, the upper part of said distributing system being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the systefm, or said distributing system comprising a chemical supply tank, a supply connection between said chemical supply tank and said distributing system to supply additional extinguishing liquid thereto, chemical mixing devices cooperating with said supply tank and comprising a tipping acid container and actuating members comprising an actuating piston arranged in a cylinder formed in said supply. connection and located within said tank, a suction connection between the air space in the upper part of said distributing system and said supplv connection adjacent. said chemical supply tank, and a checkvalve cut-oil device in said supply connection between said suction connection and said distributing system.

3. In automatic fire extinguishing apparatus, a distributing system normally charged with non-freezing extinguishing liquid and comprising automatic distributing devices including automatic sprinkler heads, the upper part of said distributing system being substantially closed under tank, a supply connection between said chemical supply tank and said distributing system to supply additional; extingulshing liquid thereto, chemical mixing devices coiiperating with said supply tan and comprisin a tipping acid container and actuating mem ers located within said tank and connected with said supply connection, a suction connectioncontrolling said actuatmg system bein substantially closed under emergency con itions to permit a pressure change to take place thereinon the emergenc operation of the system, an automatic suppemental fluid supply for said distributing system comprising a chemical supply tank, a supply connection between said chemical supply tank and said distributing system to suppl additionalextinguishing liquid thereto, c emical mixing devices cooperating withsaid supply tank and comprising actuating members connected tosaid tank, a suction connection between the u per part of said distributing system and d actuating members and a cut-off device in said tion tem. s

5. In fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprisin distributing devices, the upper part of sai distributing system being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system comprising a chemical supply tank, a supply connection between said chemical supply tank and said distributing system to supply additional extinguishing liquid thereto, chemical mixing devices cooperating with said supply tank and comprising actuating members located within said tank and connected with said sup ly connection, a suction connection controlling said actuating members and extending beconnection and said distributing systween the upper part of said distributingsystem and said chemical supply connection and a cut-01f device in said supply connection between said suction connection and said distributing system. c

6. In automatic fire extinguishing apparatus, a distributing system normally system to suppl supply connection between said succharged with non-freezing extinguishing liquidand comprising automatic'd1stribut-. ing devices including automatic sprinkler heads, the upper part of said distributing system being substantially closed under emergency conditions to permit a pressure change to take placeitherein on the emergency operation of the s stem, anautomatic supplemental fluid suppfy for saiddistributing system comprising a chemical supply tank, a supply connection between said chemical supply tank and said distributing additional extinguishing liquid thereto, c emical mixing devices cooperating with said supply tank and comprising a tipping acid. container and actuatmg members located within said tank, a suction connection controlling said actuating members and extending from the air space in the upper part of said distributing system and a cut-ofl? device in said sup 1y connection between said suction connectlon and said distributing system.

7. In automatic fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising automatic distributing devices, the upper part of said distributing system be ing su stantially closed under emergency conditions to permit a pressure change to take place therein in the emergency operation of the system, an automatic supplemental fluid supply for said distributing system comprising a chemical sugplly tank, a supply connectlon between sai c emical supply tank and said distributing s stem to supply additional extinguishing iquid thereto, chemical mixing devices coiiperating withsaid supply tank and com rising actuating members locatedwithin. said a suction connection controlling said actuattank,

ing members and extending from the upper system, and acutconnection between and said distributpart of said distributing oif device in said supply said suction connection ing system.

y 8. In fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising distributing devices,"the fupper art of said distributing system being su stantially closed under, emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system comprising a chemical supply tank, a supply connection between said chemicalsupply tank and said distributing system to supply additional extinguishing liquid thereto, chemical mixing devices coiiperating with said and comprising actuating devices located within said tank, a suction connection bebetween the upper part of said distributing system and said actuating devices and a cutsupply tank naeaeoo ofi device in said supply connection between said suction connection and said distributing system.

9. In automatic sprinkler fire extinguish ing apparatus, a distributing system normally charged with extinguishing liquid and comprising automatic distributing devices including automatic sprinkler heads and hose connections, an actuating supply tank containing a charge of said extinguishing liquid and connected to the upper part of said distributing system, a reduced area venting device connected to the upper part of said actuating tank, the upper part of said distributing system extending above the operating distributing device and being sub stantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system, a supply connection between said supplemental fluid supply and said distributing system to supply additional extinguishing iquid thereto, a suction connection ontrolling said automatic supplemental fluid supply and communicating with the air space in the upper part of said distributing system, a check valve cut-ofi' device in said supply connection between said suction connection and said distributing system, an automatically closing venting drain device in said supply connection between said cut-ofl' device and said suction connection and a second automatic check valve cut-ofl' device in said supply connection between said venting device and said suction connection.

10. In automatic fire extinguishing a paratus, a distributing system normal y charged with extinguishing liquid and comprising automatic distributing devices, a reduced area venting device connected to the uppe part of said distributing system, the upper part of said distributing system extending above the operating distributing device and being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply forsaid distributing system, a supply connection between said supplemental fluid supply and said distributing system to supply additional extinguishing liquid thereto, a suction connection controlling said automatic supplemental fluid supply and communicating with the air space in the upper part of said distributing system, an automatic check valve cutofi device in said supply connection between said suction connection and said distributing system, an automatically closing venting drain device in said supply connection between said cut-ofl' device and said suction connection and a second automatic check valve cut-ofl" device in said supply connection between said venting device and said suction connection.

11. In automatic fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising automatic distributing devices, the upper part of said distributing system extending above the operating distributing device and being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system, a sup-ply connection between said supplemental fluid supply and said distributing system to supply additional extinguishing liquid thereto, a suction connection controlling said automatic supplemental fluid supply and communicating with the upper part of said distributing system and said automatic fluid sup-ply, an automatic check valve cut-off device in said supply connection between said suction connection and said distributing system, a venting drain device in said supply connection between said cut-off device and said suction connection and a second automatic check valve cutoff device in said supply connection between said venting device and said suction connection.

12. In automatic fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising automatic distributing devices, the upper part of said distributing system extending above the operating distributing device and being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system, a supply connection between said supplemental fluid supply and said distributing system to supply additional extinguishing liquid thereto,actuating members communicating with said supply connection, a suction connection between the air space in the upper part of said distributing system and said actuating members, an automatic cut-ofi' device in said supply connection between said suction connection and said distributing system, a venting drain device in said supply connection between said cut-ofl' device and said suction connection and a second automatic cut-ofl' device in said supply connection between said venting device and said suction connection.

13. In automatic fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and com-- prising automatic distributing devices, the upper part of said distributing system extending above the operating distributing device and being substantially closed under emergency conditions to permit a pressure charge to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system, a supply connection between said supplemental fluid supply and said distributing system to supply additional extinguishing liquid thereto, actuating members communicating with said supply connection, a suction connection between the upper part of said distributing system and said actuating members and an automatic cut-off device in Said supply connection between said suction connection and said distributing system.

14. In fire extinguishing apparatus, a distributing system comprising an upper suction portion substantially closed under emergency conditions and distributing devices including automatic sprinkler heads below said suction portion, non-freezing extinguishing liquid in said distributing system, an automatic supplemental fluid supply comprising a chemical supply tank communicating with said system and including actuating members located in said tank, a Sun tion connection communicating with the up per suction portion of said distributing system and automatically operating said actuating members under emergency conditions to supply additional extinguishing fluid to said system and automatic cut-off and venting devices between said supplemental fluid supply and said system.

15. In fire extinguishing apparatus, a dis tributing system comprising an upper suction port on substantially closed under emergency conditions and distributing devices below said suction portion, non-freezing extinguishing liquid in said distributing system, an automatic supplemental fluid sup ply comprising a chemical supply tank communicating with said system and including actuating members located in said tank and a suction connection communicating with the upper suction portion of said distributing system and automatically operating said actuating members under emergency conditions to supply additional extinguishing fluid to said system.

16. In fire extinguishing apparatus, a distributing system comprising a suction portion in which a pressure reduction is produced under emergency conditions and dis tributing devices below said suction portion, non-freezing extinguishing liquid in said distributing system, an automatic supplemental fluid supply comprising a chemical supply tank communicating with said system and including actuating members located in said tank and a suction connection communicating with the suction portion of said distributing system and automatically operating said actuating members under emergency conditions to supply additional extinguishing fluid to said system.

17 In automatic fire extinguishing apparatus, a distributing system normally charged with non freezing extinguishing liquid and comprising automatic distributingdevices including automatic sprinkler heads, a reduced area venting device connected to the upper part of said system, the upper part of said distributing system being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system. an automatic supplemental fluid supply for said distributing system comprising a chemical supply tank, a supply connection between said chemical supply tank and said distributing system to supply additional extinguishing liquid thereto, chemical mixing devices cooperating with said supply tank and connected with said supply connection, a fluid actuat ingconnection to actuate said supplemental fluid supply and extending between the air space in the upper part of said distributing system and said supply connection adjacent Said chemical supply tank, an automatically closing venting drain device in said supply connection between said distributing system and said suction connection and cut-off devices automatically opening toward said distributing system arranged in said supply connection and normally closed on both sides at said drain device.

18. In automatic fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising automatic distributing devices, the upper part of said distributing system being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system comprising a chemical supply tank, av supply connection between said chemical supply tank and said distributing system to supply additional extinguishing liquid thereto, chemical mixing devices cooperating !with said supply tank and connected with Said supply connection, a fluid actuating connection to actuate said supplemental fluid supply and extending between the upper part of said distributing system and said supply connection, an automatically closing venting drain device in said supply connection between said distributing system and said suction connectionand cut-off devices automatically opening toward said distributing system arrangedin said supply connection and normally closed on both sides of said drain de- V106. i

19. In "automatic fire extinguishing apparatus, a distributing system normally charged with extinguishing liquid and comprising distributing devices, the upper part of said distributing system being substantially closed tributing devices,

under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system comprising a supply tank, a supply connection between said supply tank and said distributing system to supply additional extinguishing liquid thereto, a fluid actuating connection to actuate said supplemental fluid supply and extend ng from the upper part of said distributing system, an automatically closing venting drain device in said supply connection between saiddistributing system and said suction connection and cut-ofl' devices automatically opening toward saiddistributing system arranged in said supply connection and normally closed on both sides of said drain device. Y

20. In automatic fire extinguishing apparatus, a distributing system comprising distributing devices, the upper part of said dis tributing system being substantially closed under emergency conditions to permit a pressure change to take place therein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system comprising a supply tank, a supply connection between said supply tank and said distributing system to supply additional extinguishing liquid thereto, a fluid actuating connection to actuate said supplemental fluid supply'and extending from the upper part of said distributing system, a venting drain device in said supply connection between said distributing system and said-suction connection and cut-ofi' devices automatically opening toward said distributing. system arranged in said supply connection and normally closed on both sides of said drain device.

21. In automatic fire extinguishing apparatus, a distributing system comprising disthe upper part of said distributing system being substantially closed under emergency conditions to ermit a pressure change to take placetherein on the emergency operation of the system, an automatic supplemental fluid supply for said distributing system, a supply connection between said supplemental fluid supply and said distributin system to supply additional extinguishing liquid thereto, a fluid actuating connection to actuate said supplemental fluid supply and extending from the upper part of said distributing system, a venting drain device in said supply connection between said distributing system and said suction connection and cut-off devices automatically openin toward said distributing system arranged in said suppl connection and normally closed on both si es of said drain device.

22. In automatic fire extinguishing apparatus, a distributing system comprising distributing devices, the upper part of said distributing system bein substantially closed under emergency con itions to permit a pressure change to take lace therein on the emergency operation ol the system, an automatic supplemental fluid supply for said distributing system, a suppl connection between said supplemental fi uid supply and said distributing system to supply additional extinguishing liquid thereto, a

fluid actuating connection to actuate said supplemental fluid supply and extending from the upper part of said distributing system, a venting drain device in said supply connection between said distributing system and said suctionconnection and check valves automatically opening toward said distributing system arranged in said, supply connection and normally closed on both sides of said drain device.

23. In iire extinguishing apparatus, a distributing system comprising distributing devices, non-freezing extinguishing liquid in said system, an automatic fluid supply comprising a chemical supply tank, a supply connection between said sup lyi and said system to supply additiona extinguishing liquid thereto under emergency conditions, a suction connection between the upper por tion of said distributing system and said supply connection and mechanism controlled thereby to automatically operate said fluid supply, a normally open drain device in said supply connection between said distributing system an said suction connection and normally clo ed check-valves in said supply connection on bothsides of said drain device and automatically opening toward said distributing system under emergency conditions.

24. In fire extinguishing apparatus, a distributing system comprising distributing devices, extinguishing liquid in said system, an automatic fluid supply comprising a chemical supply tank, a supply connection 110 between said supply and said system to supply additional extinguishing liquid thereto under emergency conditions, a suction actuating connection communicating with the upper part of said distributing system and 115 with said supply connection to automatically operate said fluid supply, a normally open drain devicein said supply connection between said distributing system and said suction connection, means to close said drain 120 device under emergency conditions and normally closed cut-ofl' devices in said supply connection on both sides of said drain device and automatically opening toward said distributing system under emergency condi- 125 tlons.

25. In fire extinguishing apparatus, a distributing system comprising distributing dechemical supply tank, a supply connection between said supply and said system to supply additional extinguishing liquid thereto under emergency conditions, a suction actuating connection communicating with the upper part of said distributing system and with said su ply connection to automatically operate said fluid supply, a normally open drain device in said supply connection between said distributing system and said suction connection and normally closed cut-01f devices in said supply connection on both sides of said drain device and automatically opening toward said distributing system under emergency conditions.

26. In fire extinguishing apparatus, a distributing system comprising automatic distributing devices, non-freezing extinguishing liquid in said distributing system, an automatic fluid supply comprising a chemical supply tank connected to said distributing system, means to automatically operate said fluid supply under emergency conditions, a supply connection between said sup ply tank and said distributing system to supply additional extinguishing liquid thereto, a normallv open venting drain device in said supply connection, means for automatically closing said gency conditions and a normally closed cutoff device in said supply connection between said drain device in said distributing system and automatically opening toward said distributing system.

27. In fire extinguishing apparatus, a distributing system comprising distributing devices, extinguishing liquid in said distributing system, an automatic fluid supply comprising a chemical supply tank, means tov said supply .under a supply connection automatically operate emergency conditions, between said supply ing system to supply additional extinguishing liquid thereto, a normally open drain device in said supplv connection and a normally closed cut-o device in said supply connection between said drain device in said distributing system and automatically opening toward saiddistributing system.

EVERETT L. THOMPSON.

lVitnesses A. J. Rronaans, H. G. Moamrr.

drain device under emertank and said distribut- Corrections in Letters Patent No. i 287,800-

It is hereby oertifiedthat in Letters Patent No. 1,287,800, granted December 17, 1918, upon the application of Everett L. Thompson, of Dover, New Jersey, f an improvement in Automatic Fire-Extinguishing Apparatus," errors appear i th printed specification requiring oorrection as follows: Pixga 5., lines 85-86, claim 11, strike out the words i and said aiitomatic fluid supply page 6, line 1, claim 13, for the word "charge" read change; and that the said Letters Patent should be read with these oorrections therein that the same may conform to the record of the casein the: Patent Ofiioa.

Signed and sealed this 25th day of February, A. D., 1919.

1*. W. H. CLAY,

Acting Omnmissimwr of Patents.

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