US1298878A

US1298878A - Conduit.

Info

Publication number: US1298878A
Application number: US15173717A
Authority: US
Inventors: Harold P Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-03-01
Filing date: 1917-03-01
Publication date: 1919-04-01
Anticipated expiration: 1936-04-01

Description

H. P. BROWN.

CONDUIT.

APPLICATION men MAR. l. 1911.

Patented Apr. 1, 1919.

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HAROLD P. BROWN, OF NEW YORK, N. Y.

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Specification of Letters Patent.

Patented Apr. 1, 1919.

Application filed March 1, 1917. Serial No. 151,737.

To all whom it may concern:

Be it known that I, HAROLD P. BROWN, a citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented a new and useful Improvement in Conduits, of which the following is a specification.

' My invention relates to conduits and more particularly to conduits for use in what is known in the art as jetting concrete, viz: directing the course of concrete in a plastic state from a mixer to a point near the surface to which the concrete is to be applied.

The objects in View are to provide a conduit which shall present little friction to the moving concrete, which shall be durable, which shall prevent to a great extent loss of heat by radiation, which shall allow for changing the direction of the conduit at short intervals, and which may be quickly and conveniently assembled and moved.

A practical embodiment of my invention is represented in the accompanying drawings in which,

Figure 1 is a plan View of the meeting ends of two lengths or sections of the conduit.

Fig. 2 is a longitudinal section taken in the plane of the line IIII of Fig. 1.

Fig. 3 is a transverse section taken in the plane of the line IIIIII of Fig. 2.

Fig. 4 is a. transverse section taken in the plane of the line IVIV of Fig. 2, and

Fig. 5 is a fragmentary section on an enlarged scale showing the spiral wire within the conduit, the concrete filling between the coils of wire being indicated by a dotted line along the inner peripheral surfaces of the coils of wire.

A conduit length or section, conveniently fifteen feet in length, this, however, being altogether a matter of choice or expediency, consists of a pipe 1 of some suitable material, iron or steel for example. The opposite ends of the pipe 1 are externally screwthreaded as at 2, to receive a coupling 3, as is usual in connecting pipe lengths.

The interior surface of the pipe 1 has applied thereto an open spiral element, preferably of tempered spring steel wire 4. The space 5 between two successive coils of the wire, which form in effect slanting annular riffles, is preferably about twice the diameter of the wire in width. The wire is made fast at the opposite ends of the pipe length. The interior lining of the pipe is completed by driving through it, either before or after it is connected up for use, a stream of concrete 1 mixed with sand and what remains caught between the coils of wire 4, is allowed to set forming a solid body of concrete between the coils of wire from the interior surface of the pipe to the dotted line 6, flush with the inner surfaces of the wire 4.

To prevent loss of heat from the concrete during its passage along the interior of the plpe 1, the latter is provided with a suitable heat insulating jacket 7 of magnesia, for

example, and to protect this jacket from injury and from water, the jacket 7 is covered with galvanized sheet steel 8 wound to form a closed tube.

. In order that the conduit sections constructed as above may be conveniently handled, they are each provided with a chair near each of its two ends, the chair consisting, preferably, of a general inverted U- shaped strap of metal 9, the bight of the inverted U-shaped element having a handle 10 engaged therewith and the branches of the said element forming legs 11, 12, extending below the section and connected by a tie bolt 13. e

To connect the several sections without requiring the turning of one to screw it to another and to leave a freedom of lateral movement of the free end of a section to change the direction of the conduit to a considerable extent, for instance 3%", a special coupling has been provided as follows: A male coupling member 14 has one end provided with a screw thread 15 to screw into the ordinary coupling 3 hereinabove referred to, and near its opposite end it is provided with a peripheral groove 16. The end of an adjacent conduit section is in like manner provided with a male coupling member 17, these male coupling members being made of uniform size and shape and interchangeable. The adjacent ends of these members 14 and 17 are allowed a slight clearance to permit change in direction and are locked in the desired relation to each other by the female member of the coupling -18, consisting of a sleeve which receives the adjacent ends of the members 14 and 17 with a loose sliding fit and is provided with two sets of

perforations

19 and 20, to receive a pin or eye bolt 21, the perforations being so located ofl from the center of the sleeve, that a pin 21 will pass through two opposite perforations when a member 14 or 17 is brought into position to make its groove 16 register with the perforations. The interior bores of the members 14 and 17 correspond in diameter with the bore of the lining of the conduit section when the l-atteris completed by the cement filling between the wire coils. Any slight opening at the meeting ends of the members 14, 17, due to placing consecutive sections at an angle to each other, will be promptly filled by concrete as soon as the conduit is put in use.

This concrete lining acquires a very high polish and the wetcement forms on the surface of the concrete lining a layer of moist cement which acts as a lubricant and aids the passage through the pipe of the concrete 'or cementitious material. Hence, with the same inside diameter more material may be forced through the conduit in. a given lengthlof timeand under a given pressure than where-rubber lined hose, such as has been heretofore used, is employed.

And, furthermore, the wear, which has heretofore madethe use of iron orsteel pipe so expensive, is "avoided, the lining, constructed as hereinabove-setforth,havin a recuperathe spiral wire 4 and the concrete protection 6 can becarried through to the ends of the male couplings.

' l-Vhat I claim is:

1. A conduit comprising a pipe having a lining formed of coils of a hard material spaced apart and a filling of cementitious material between and substantially flush with the interior surface of the coils, the interior surface of the coils being exposed a part of a wearing surface.

2. A conduit comprising a pipe havinga lining formed of slanting coils of hard ma terial spaced apart and a filling of cementitious material between and substantially flush with the interior surface of the coils, the interior surface of the coils being exposed as part of a wearing surface;

3. A conduit comprising a pipe having a lining formed of spiral wire coils spaced apart and a filling ofcementitious material between and substantially flush with the interior surface of the coils, the interior surface of the coils being exposed as part of a wearing surface.

4. A conduit comprising a pipe composed of hard material, said pipe having a lining formed of coils of hard material spaced apart and a filling of cementitious material between and substantially flush with the interior surface of the'coils, the interior surface of the coils being exposed as part of a wearing surface. 1

In testimony,-that I claim the foregoing as my invention, I have signed my name this 15th day of February 1917.

" HAROLD P", BROWN.

Copies-cums patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

' Washington, D. G. v