US146902A - Improvement in filtering-points for well-tubes - Google Patents

Description

U ITED STATES- PATENT OFFICE GEORGE A. IDUVLEY, OF NEYV YORK, N. Y.

IMPROVEMENT IN FlLTERlNG-POINTS FOR WELL-TUBES.

Specification forming part of Letters Patent No. 146,902, dated January 2.7, 1874; application filed November 13, 1873.

To all whom it may concern:

Be it known that I, GEORGE A. llAwLnY, of New York, in the county of New York, and in the State of New York, have invented certain new and useful Improvements in Filterin Points for Drivenell Tubes; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing making a partof this specification, in which Figure 1 is a side elevation of my improved device, and Fig. 2 is acentral longitudinal sec tion of the same.

Letters of like name and kind refer to like parts in each of the figures.

In the formation of driven wells much difficulty has been experienced in so constructing the filtering-point of the well-tube as to efiable the same to be driven to place or removed from the well without injury to its screens, the means ordinarily used to protect the latter from injury affording, in most instances, a lodgment for sand, dirt, &c., which operate to obstruct said strainers, and thus render the well in a measure useless.

To obviate this ditticulty is the design of my invention; which consists in a filter-point having its strainers arranged within grooves formed in its periphery, which grooves are separated and said strainers protected by means of transverselyrounded ribs or hands, substantially as and for the purpose hereinat ter specified.

In the annexed drawing, A represents a well-tube point, provided interiorly with an opening, B, which extends longitudinally and centrally from its upper end downward nearly to its lower end, while exteriorly said device is conical or pointed at its lower or solid end, and between the same and its upper end is provided within its periphery with a number of annular grooves, a, that are separated by means of ribs a u a, which have, transversely, a half-round shape. At the outer sides of the upper and lower grooves the point A extends upward and outward in a curve'sim ilar to the curves of said ribs. \Yithin the bottom of each groove (1 are provided a number of openings, 1), which extend radially inward from equidistant points, and enable communication to be had between theinterior and exterior of the pipe or point A. Screens of wire-cloth, reticulated sheet metal, or other similar material, C, are now titted closely around the tube within the bottom of each groove, and completes the device, which is used in the ordinary manner, by being attached to the end of a pipe and driven downward into the ground until a water-vein is reached, when the water will pass inward through said screens, and can be drawn upward through said pipe.

As these devices have heretofore been made, in some instances the ribs have been parallel with the axis of the point, and the wire-gauze in a single sheet placed over them, or circumferential bands have been used with the wiregauze, filling the entire space (in a single sheet) between the head and point and, again, the body of the point has been made with expanding or contracting ring-sections, the perforated or upper parts of which are covered with wiregauze; but my devicediffers from all these in placing the wire-gauze in depressions formed by the circumferential. ribs of the particular form described, whereby they are almost completely protected, as is above clearly set out.

The advantages obtained by this construction are as follows: First, by making the dividing ribs and the portions of the tube coir tiguous 'to the outer side of the upper and lower grooves semicircular, but slight resistance is olfered to the downward passage of said tube through the soil, or itswithdrawal there. from whenever occasion may require. Second, the point can be driven into or removed from the ground without injury, while, as ordinarily constructed, the points are seldom intact when driven to any distance, and their removal is certain -to destroy their useful- .llGSS.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1s 7 The well-tube point A, having its strainers or screens 0 arranged within grooves, a, formed in its periphery, which grooves are sepa 'atcd and said strainers or screens protcctcd by means of the ribs or bands at a, a, which have, transversely, ahalf-round shape, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 27th day of October, 1873.

GEORGE A. H AYVLEY.

Witnesses:

JOHN G. HEsTEn, W. F. RAvMoNn.

Images