US2011803A - Fire extinguisher - Google Patents

Description

Aug. 20, 1935.- N. DUBE Y FIRE EXTINGUISHER Filed sept. 21, 1934 IIllll Patented ug. 2.9,k 1935 jv ff ijnbfey'ltaffuqud Queb'e'cQfCanada v Application September 21,1934, Serial No. 744,878`

i wees? 01- 16S-.2).

The present invention' pertains tofanovelfire' extinguisher intendedv principalflyl for use! on chimneyflres. AThe device is ai'it'ornaticY in operation', being discharged onthefattain-inent of a certain high temperature in the chimney. :Atsuchptirnes, ajusible link is melted, thereby releasing a weight to open a valve and empty a tank of liquid vinto the chimney. At'the lsame time, a bottle containinganother nre extinguish` Ving substance is emptied into the tank. This permit rain Water to collect at the exposed sides of the tank to form a heat insulation.

The invention is fully disclosed by way ofl example in the following description and in the accompanying drawing in which Figure 1 is a detail vertical section of a chimney, showing the device of the invention in ele- Vation; -v v l Figure 2 is a perspective view, partly broken away, of a chimney equipped according to the-invention; and

Figure 3 is a perspective View of the electric alarm switch. n

Reference to these views will now be made b'y use of like characters which are employed to Y designate corresponding lparts throughout.

In Figures 1 and 2 is shown a brick chimney I on the top of which is mounted and secured a other wall 3 maybe erected at the yinner edge of interior of the chimney.

around a bell 8 held by a collar 9 having a circuthe chimney to forma space 4 with the inner wall 5 of the tank as shown in Figures 1i and -2. f

which. communicates with the space si, and both the trough and the space become normally lled `with rain water.

The tank is preferably made of sheet metal, andy the wall 3 consists of asbestos or other suitable heat insulating material. f j

vIn the bottom of the tankk is an opening 6 from which extends a discharge pipe 'l leading to the The pipe discharges lar series of apertures lil.v The opening 6 is nor- Y mally closed by a valve Il having a stem l2 extending upwardly through the'topof Athe tank 2,.

. To the bottomof The tank.' i`s:iilledvwitl1r water or other suitable liquidfthroufgh a Vpipe ita,.- v 1 r.'Ioatheeinnosed upper endiiof the "stenrfifis pivotedqa lever I4 fulcrum'edona bracket't and extending into the chimneyt A.A cord'v i6' hangs from: the free end of the leverjand carries a weigntvrtwhieh would-ordinarily tend.V mi lift the valve Il to itsopen position. The weight however is held in elevated 'orpidle position by another-cord I8 connected to a bracket le 2l on which is pivoted a seat or cup 22." The latter receives an upright bottlev 23 which widens slightly inthe upward direction. A iinger 2li In'the operation of the device as thus, -far de scribed, the link 20 is broken'and the weight i'l released on the-'occurrenceoi a given temperature in the chimney. The weight then acts on the lever i4 to lift the valve Hand permit the contents ofthe tank to flow through pipe 'i into the chimney.Y At thesame time, the ringer 2li ridesupward'on the flared wall of the container 23, thereby swinging the container and its seat 22 on `the pivot 25, so that the container 23 is discharged into the tank. The container 23 holds a substance adapted to react with the contents outwardly through the holesy i0 to cover substantially the entire crosssectional area of the chimney. v

As shown .in Figures i and 2, the insulating lwall 3 projects slightly above the top oi-l the tank l as indicated by the vnumeral 25. Similarly, the

upwardly above the top as indicated by the nurneral '28. In this way there is formed a trough The inner wall `oi the tank is ythe tank 2 is fixed a bracketY xed to the valve `stem l2 engages the sidewall of the bottle.

f outer` vertical wall 2T of the tank also projects thereby insulated from the heat of the chimney,

and the top of the tank from the heat of the u sun, .to prevent evaporation, excessive heating and vapor pressure of thecontents'of the tank.

On-the top of the tank and'near the exposed end of thevalve stem l2 is mounted a bracket 29 to which' is pivoted a switch arm 363 in the lforni adapted to be liftedy by an arm 3| carried by thek Y stern I 2 when the latterVV raises,lto`throw the other lus end of lever 30 into a xed switch Contact 32.V The bracket 29 and contact 32v are connected by conductors 33 and 34 respectively to the termi#- nals of a bell or other alarm 35, with a battery 36 or other source of current interposedin one oifv It will be evident that this cir-Y the conductors. cuit is closed at theV switch when the valve stemy l 2 rises on melting ofthe fusible link20 asrabove set forth, so that wthe alarmis sounded; A

Although a specic embodiment of the inven-,Y tion has been illustrated and described, it will be .understood that various alterations in'thede' tails of construction' may be madewithout .de-

parting from the scope of the invention as indi- Y' Y 'to the inner side of; said Atank and spaced therefrom, said space being open to thev atmosphere cated by the appended claims. .Y

What I claim is:-

l 1. A re extinguisher comprising, in combina# tion withachinmey, a tank mounted thereon and adapted to contain a luida receptacle contained in said tank, a weight connected to said receptacle Y and positioned to tip the receptacle and ,empty it into-said tank, a support for holding said weight in an inoperative position and including. a fusible member Within said chimney, a Valve'adapted to place said tank in communication with the irlterior of said chimney, said Weight being also adapted tc open said valve, and a'wall built adjacent to the 'inner' side of said tank and spaced therefrom, said space being open to the atmospherelat the top for receiving rainwater.

memberK within said chimney, Va valve adapted to placefs'aid'i tank in communication With the in-V terior Ofaidchimney, said Weight being also adapted toopen said valve, a Wall built adjacent

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