US1936246A

US1936246A - Hydraulic air jet

Info

Publication number: US1936246A
Application number: US567912A
Authority: US
Inventors: James P Carter; George R Mcalpine
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-10-09
Filing date: 1931-10-09
Publication date: 1933-11-21
Anticipated expiration: 1950-11-21

Description

Nov. 21, 1933. J p. CARTER r AL 1,936,246

HYDRAULIC AIR JET Filed Oct. 9. 1931 ATTORNEYS.

Patented Nov. 21,1933

HYDRAULIC AIR JET James P. Carter and George R. McAlpine, Oklahoma City, Okla.

Application October 9,1931. SerialkNo. 567,912 H "6 Claims. (01. seeos) a Our invention relates'to jets, and more par ticularly to an air jet operated by flowing liquid.

-In fighting'a fire within the basement, or in an inclosed place within the building, the confined smoke and gases, together with the heat, make it'extremely'dangerous, and usually practically impossible for firemen to enter such places in order to reach thaseat of the fire with a stream of water. Consequently, the usual methodof fighting a basement fire is to play a number of streams of waterinto the basenient from the outside, in an attempt to literally drown everything in the basement, including the fire. The

jwaterupon the seat of "the fire "where it would do the most good. The result would be the elimi- 1 nation of much d'angerto the firemen and the preventionof much loss of property. I

The objects of our invention are to provide .a hydraulic air jet which is new, novel, practical and of utility; which is operated by attachment to a usual fire hose; which will quickly and efiiciently'withdraw heated gases and smoke from basements and other inclosures; which will be will have no movingparts tobecome worn or get out of order; which will be strong and durable;

and, which will be eflicient in accomplishing all iiof the purposes for which it intended.

With these and other objects in view as will more fully appear, our invention consists in the construction, novel features, and combination of parts, hereinafter more fully described, pointed 'out in the claims hereto appended, and illustrated in the accompanying one sheet drawing, of which,

Figure 1 is a longitudinal sectional view of the device;

Fig. 2 is an end elevation of the discharge end 'Jof the device, and,

Fig. 3 is an elevational view of the intake end of the device. 7

Like characters of reference designate like parts in the drawings and figures.

It is understood that various changes in the form, proportion, size, shape, Weight, and other details of the construction, withinthe scope of our invention, may be resorted to without departing from the spirit or broad principle of our invention and without sacrificing any of the advantages thereof; and it is also understood that the drawing is-to be interpreted as being illustrative and not restrictive.

One practical embodiment of our invention, as illustrated inthe drawing,compri'ses: i I I A hollow cylindrical metal housing or Venturi tube 1 having an intake end 2 and a discharge. end 3, both or either of which are-adapted tobe connected by any usual means, such as fiangesi to a pipe or pipes 5. Within said housing 1 is pro-. vided a hollow false wall 6 which at its outer ends is made integral with or is welded to the inner. wall surface of the housing, and the bore of which is reduced in'diameter'at substantially its -mid-" section, asbest seen in Fig. land as is. indicated by the reference numeral 7'. I

.A preferred degree pipe bend 8 passes laterally through the wall of said housing 1 and through said false wall 6 and its inner end 9 terininatesin axial alinement with the bore of said false wall 6 at the point 7 at which said bore is the smallest in diameter. Atthe points where said bend 8 passes through the housing and through the false'wall, it is rigidly andhermetically welded in position. The inner or "discharge end 9 of said bend 8 is rigidly held in position by being Welded to the inner ends of a plurality of webs 10 the outer ends of which are made integral with or are rigidly welded to the inner the end 9 of said bend 8 and is held in spaced relation with the end 9 by a plurality of webs 13 which are rigidly positioned by welding, or the like, within said end 9.

In operation, the pipe 5 which is connected to the intake end 2 of the housing 1 will be extended into the basement, preferably through a hole cut in the floor above, and sacks or other packing will be placed around it so that no substantial amount of air can enter the basement through the cut hole. A fire hose will then be attached to the coupling 11, and the water under high pressure will be turned on. The water inleaving the end 9 of said bend 8 will strike against the baffle l2 and be diverted to the inner surface of the false wall 6 at a point adjacent said discharge end 3 of the housing, as illustrated by the dotted lines and arrows in Fig. 1. There will be a substantially conical sheet of water traveling from said baflie 12 to the point where the major portion of the water strikes said false wall 6. This traveling conical sheet of water will cause air, heated gases and smoke to be drawn into the intake end 2, and the air, gases and smoke will be discharged through the outlet end 3 with the water.

If found desirable, inorder to decrease the resistance to the moving smoke and gases, that portion of said bend 8 which lies within said false wall 6 nearest said intake end 2, may be bevelled to a knife edge 14.

Due to the fact that water is substantially eight hundred times as heavy as air, it may be understood that if the conical sheet of water is traveling at a high velocity, a tremendous suction will be exerted through said intake end 2, and that a large volume of the smoke and gases can be handled through our device in a short period of time.

Obviously, the invention is susceptible of embodiment in forms other than that which is illustrated in the accompanying drawing and described herein, and applicable for uses and purposes other than as detailed, and we therefore consider as our own all such modifications and adaptations and other uses of the form of the device herein described as fairly fall within the scope of our invention.

Having thus described our invention, what is claimed and desired to be secured by Letters Patent, is: r

1. A hydraulic air jet, embodying a hollow duct having a bore restricted in diameter at a substantially medial point, said bore gradually sloping away from the stricture toward the ends of the duct to a greater diameter, a liquid conveying pipe having its outlet end axially positioned within the stricturein spaced relation to the walls thereof, and a baflie adjacent the outlet orifice of said pipe for directing the liquid toward the sloping inner wall of the duct.

2. A hydraulic air jet, embodying a hollow duct having a bore restricted in diameter at a substantially medial point, said bore gradually sloping away from the stricture toward the ends of the duct to a greater diameter, a liquid conveying pipe having its outlet end axially positioned within the stricture in spaced relation to the walls thereof, and a conical baffle adjacent the outlet orifice of said pipe for directing the liquid to the sloping inner wall of the duct.

3. A hydraulic air jet, embodying a hollow duct having a bore restricted in diameter at a substantially medial point, said bore gradually sloping away from the stricture toward the ends of the duct to a greater diameter, a liquid conveying pipe having its outlet end axially positioned within the stricture in spaced relation to the walls thereof, and a baflle adjacent the outlet orifice of said pipe for directing the liquid toward a point on the wall of the bore adjacent the outlet end of the duct.

4. A hydraulic air jet, embodying a hollow duct having a bore restricted at a point intermediate its ends, said bore being gradually enlarged from the stricture to the ends of the duct, a liquid conveying pipe, means carried by the inner walls of the duct for rigidly positioning the outlet end of said pipe axially in said stricture in spaced relation to the walls of the duct, a conical bafiie adjacent the outlet orifice of said pipe for directing the liquid in a conical sheet toward a point on the wall of the bore adjacent the outlet end of the duct, and means for holding said baffie in spaced relation to the outlet end of said pipe.

5. A hydraulic air jet, embodying a hollow duct having a bore restricted at a point intermediate its ends, said bore being gradually enlarged from the stricture to the ends of the duct, a liquid conveying pipe having its inlet end exterior to and its outlet end within said duct, means carried by the inner walls of the duct for rigidly positioning the outlet end of said pipe axially in said stricture in spaced relation to the Walls of the duct, a bafiie adjacent the outlet orificeof said pipe for directing the liquid toward a point on the wall of the bore adjacent the outlet end of the duct, and means for holding said baffle in spaced relation to the outlet end of said pipe.

6. In a hydraulic air jet, a liquid pressure line, a Venturi tube concentrically surrounding the discharge end of the line, the reduced portion of said tube located adjacent said discharge end, and a baffle adjacent said discharge end for deflecting liquid from the discharge end of the line to the walls of the tube in a conical sheet. 7

JAMES P. CARTER. GEORGE R. MCALPINE. 1