US482020A - Sand-screen - Google Patents

Description

(No Model.)

o. MONJBA. SAND SCREEN.

No. 482,020. Patented Sept. 6, 1892.

Nr'rn STATES CLEOPHAS MONJEAU, OF MIDDLETOWN, OHlO.

SAND-SCREEN.

SPECIFICATION forming part of Letters Patent No. 482,020, dated September L6,1892.

Application led September 24, 1891. Serial No. 406,639. (No model.)

.To @ZZ whom, it may concern.-

Be it known that I, CLEoPHAs MONJEAU, a citizen of theUnited States,residin g at Middletown, Butler county, Ohio, have invented new and useful Improvements in Sand-Screens, of which the following is a specication.

My invention relates to sand-screens, and particularly to the class of screens in which the screening-apertures are circumferential slits madeinatubular body, its object being to produce an inexpensive and efficient screen of novel construction, great capacity, and resisting strength, one feature of which is of general application as an improvement to screens of the same constructive type to increase the water capacity.

To this end my invention consists in a sandscreen composed of a cylindrical tube of metal, provided interiorly upon its inner periphery with independent longitudinal supportingribs and having a series of circumferential screening-slits cutting through and entirely around the cylindrical shell; and it further consists in a series of longitudinal grooves sunk partially but not entirely through the tubular body crossing the circumferential slits. This latter feature of my invention may be employed upon all sand-screens of the general type having circumferential slits as an independent feature, while also the firstmentioned construction may also be used independently of the second, although the best results are attained in the use of both together.

Mechanism embodying my invention is illustrated in the accompanying drawings, in which- Figure l is an external View of my improved screen complete; Fig. 2, a perspective view of part of the tubular body, showing the interior construction; Fig. 3, an enlarged detail section in the plane of one of the horizontal screening-slits; Fig. 4, an enlarged detail section in the plane of one of the vertical feedgrooves; Fig. 5, an enlarged diagram exhibiting the boundaries of the general Water-aperture (in an isometric plane) formed by one of the circumferential slits with its feedgrooves, showing the increased capacity. Fig. 6 is a screen embodying my invention of a type in which the tubular cross-slitted body is composed of a strip or strips wound spirally consists of a cylindrical shell A', a head or cap A2, and a point A5. The shell A is a hollow cylinder provided with independent interior longitudinal supporting-ribs a, which are preferably drawn withthe tube in the process of manufacture. ToV constitute the screen, continuous circumferential slits b are sawed or cut through the cylindrical shell and partly through the supporting-ribs a, as indicated in Fig. 3. The intact portions of the ribs constitute a support forthe screen, which still maintains its general f cylindrical form. The screening-slits thus made are continuous circumferentially. They may be in parallel planes at right angles to the axis, or a single spiral slit continuous throughout. Thus constructed the screen is easily and cheaply made and is effective for the purpose.

A further feature of my invention consists in increasing the water-receiving capacity of a screen of this general character as follows: Across the circumferential slits, however made, is cut a series of parallel longitudinal recesses or grooves c, extending into the surface of the shell, say, to one-half of its thickness. These cross the first-named slits b and increase its receiving area, as shown in an isometric plane in Fig. 5. The increase is more perceptible in those screens in which the screening-slit widens inwardly, an example of which is exhibited in Figs. 6 and 7. Here the tubular body of the screen is composed of strips of proper section, as d, Fig. 7, wound spirally upon a suitable perforated hollow core e,with an intervening perforated separatingstrip f. The longitudinal grooves c are cut to the depth of the separating-strips, as shown.

As the screening-slits and feed-grooves are exceedingly minute, they both serve to screen out the sand and admit the water.

The practical advantge of the improvement will be readily understood if we conceive of the water capacity of the screening-slit interfered with by the lodgment of particles of sand at its outer margin too large to pass between, but held there by the inner suction and obstructing the free entrance of water. Now

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shell, leaving the supporting-ribs substantielly intact, substantially as set forth.

2. In a sand-screen of the general' type embodying a. tubular shell cut through by screenin g-slits, a series of cross-grooves out partially through the shell across the screening-slits, substantially as set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

GLEOPI-IAS MONJEAU.

Witnesses:

L. M. HOSEA, E. HosEA.

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