US899054A - Well-strainer. - Google Patents

Description

E. E. JOHNSON.

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UNrTED STATES PAENT OFFICE.

EDWARD E. JOHNSON, or WHITE BEAR, MINNESOTA. f

WELLSTRAINER. o Q A To all whom 'it may concern.'

Be it known that I, EDWARDVE. JonNsoN,` Aa citlzen of the UnitedStates, and a resident of W'hite Bear, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements `in vWellStrainers, of which the following is a specification.

This invention relates to well strainers of that class which are more particularly do-v signed for use in bored or driven wells, and which are customarily attached to the lower end of the tubular casing or lining of the well to admit water to said casing while excluding the sand, etc., which tends to enter with the water.

The obj ect of the invention is to provide an improved construction in devices or this character, and Yit consists in the matters thus and hereinafter s'et forth andparticularly pointed i terlocking out in the appended claims.

In the accompanying drawinvs,-Figure 1 is an elevation, partly in section, of a well casing provided with a strainer constructed in accordancewith my invention in one form. Fig. 2 1s a vertical section on a smaller scale of a cased well having one of these strainers attached to the lower end of its casing. Fig. 3 is a pers ective view sh wing the manner of forming t e strainer of a spiral Winding of wire of ap ropriate'cross section. Fig. 4 is an enlarged fragmentary detail of the surface of the strainer, as viewed from without. Fie'. 5 is a sectional detail taken on line 5 5 ozig. 4 and showing the shape in cross section of the wire which is coiled up to form the strainer and also showing the manner in which the adjacent convolutions of the coil are made to interlock with each other. Fig. 6 is a perspective detail of a fragmentof the Wire o whlch the strainer is composed. Fig. 7 is a transverse section, taken on line 7-7 of Fig. 8, showing the manner in which a tubular strainer maybe built up of parallel longitudinally extending strands of wire interlocked according to mv invention. Fig. 8 is a side elevation partially in section, of this construction of strainer. Fig. 9 is a to lan view of a flat strainer built up of para e instrands of wire, in accordance with m lnvention.

The improved strainer thus illustrated as embodying my invention in one form, consists of a spiral winding 1 of wire (usually made of brass or other. metal calculated to resist corrosion), between the convolutions of which narrow-spaces 2 are left to permit Specification of Letters Patent. application med February e, 1905. serrrNm 244,266. i

Patenten sepeae, 190s.

vening spaces 2 may and referably will be continuous ,with each 'fot 1er, or Vin other words will form a continuous slit or crevice extending spil-ally around the surface of the strainer from one'. end to the other of its 'aethew'ater to enter 4.the well. These inter` Y i tive or water admitting surface. order Y to render such splral winding 1 permanent Y in shape and preserve the correct relation of its convolutions, the wirelpf which the Y winding is composed is made of such shape that its adjacent convolutions will interlock with each other, after the manner illustrated, for example, in Fig. 5. lt is here shown as provided on its upper outer face with a longitudinal groove 3, which leaves its up er edge t0 form an outwardly projecting ongitudinal flange 4, and as' revexscly provided on f i its lower inner face with a Ongjitudina] groove 5, which leaves its lower edge to form an inwardly projecting flange 6.' vThe upper edge flange 4 and the lower inner groove 5 are furthermore so shaped with reference to cach other that said flange of one convo.- lution will fit into said groove of the next convolution, and interlock therewith suf. ticiently to withstand any endwise strain to 'which the strainer will ordinarily be subjected. To prevent the winding from uncoiling its ends can be made fast at the top and bottom of the strainer, or to form a more perfect interlocking connection1 sufficient in itself to resist uncoiling, the inter- 'mediatc inner edge 7 of the wire above the groove 5 can be made to project slightly, (see Fig. 6, and upper portion of Fig. 53, and this projecting edge rolled or spun down over the upper edge of the subjacent convolution after the flange 4 thereof nes entered the groove 5. This forcing or spinning down of the edge 7 is facilitated by rounding over the upper edge ofthe wire, as shown, and it serves to permanently lock the adjacent convolutio'ns of the wire togetifr and make of the winding a substantially hornogeneous cylinder.

As herein shown the water inlet crevice 2 is formed between the convolutiorss of the wire on its outer face, bv making the lower liange 6 of the wire slightly less in depth than the u p'er groove 3 thereof, so that in the 1nterloc ving of the adjacent convolutions this flange 6 does not quite close the groeve but leaves a continuous spiral opening `netween the lower edge of each superjacent convolw.

next subjacent convolution. Communica#l tion betweenthis crevice 2 and the interior: Vof the winding is then established, as herein shown, by perforations 9 formed in the thin web 10 ofthe wire which fotheJ back of its upper outer groove 3. These 'perfcations `Qcan be and are herein shown-.as equal in 9, which channel, since it increases in area \towards its inner side, is not likely to be clogged, but will permit thel free passage into the well of any sand or sediment which is small enough to enter the crevice 2.

The body of the strainer having lheen constructed in some such manner as that above set forth, its ends maybe formed as desired. As herein shown, these consist of a lower end nipple 12 and an upper end nipple 13, of

which the proximate ends are screw threaded, the one exteriorly at 14 and the other interiorly at 15, to correspond with the thread like winding of the strainer body. Connecv tion is then made between the body of the strainer and the lower end nipple 12 by screwing the lower end of the winding down over the exteriorly threaded upper end of this ni ple, while connection is made between t e body of the strainer andthe u per end nipple by screwing the upperend or the Winding up into the interiorly threaded end of this nip le. The joints at the two ends may then be brazed together, if desired, or may be fastened in any other suitable Way to render the connection permanent.

The lower ni ple 12 will ordinarily be provided with a bail or cross bar 16 beneath which a rod may be hooked to lower the strainer to the bottom of the well casing C or to raise it therefrom. After it is lowered into place, any suitable water tight connec-v tion can be made between theupper end of the strainer and the casing. This connection Vis herein shown as formed by a lead collar 17, the lower end of which is Vinterlocked with the upper nipple 13, in any suitable manner, as at 18, an the u per end of which can be swaged out to lit c osely against the inner wall of the casing, as at 20.

The helical body oli the im roved strainer construction thus described oes not require to be kept in stock, but may be readily coiled up as ordered 4 and to the diameter desired it being an indifferent matter, with this form of construction, whether such diameter is great or small. The wire of which the winding is composed may be rolled or drawn to its finished shape, except for the holes which can be readily punched therein, and since no other machine wo'rk is required the stock of which the wire is made may be of the hardest quality, with correspondingly increased resistance to the abrasive action of thesand. y l l The effective i-nlet area of the strainer is relatively large, while its vmeshl .is relatively small, and itsstrainer action correspondingly effective with a minimum tendency towards clogging. The strength of -the construction, furt iermore, is unusual, and renders it little likely to be damaged in han-- dling or in the process of inserting it in the wall or removing it therefrom for replacement or repairs. A

It will be understood that while the cy-' lindrical or tubular form of strainer particularly lends itself to pur oses of this invention," and to the spira formation hereinbefore described, the invention may also be embodied in other thantubular 'or cylindric strainers, as, for example, in the flat strainer surfaces re uired in the strainer heads of ilters and t e suction plates of paper makers screens, etc. A These can obviously he formed h parallel stri s of the overlappin' wires and artcu arly by such strips w en in terlocked) and rolled together, in the manner described. It will also be understood that tubular or cylindric strainers and strainers having curved surfaces generally, may be constructed in a similar manner of parallel strips which do not run spirally, but extend either lengthwise or transversely of the cylinder or curved surface and are secured together at their ends by the nipples shown, or

by some corresponding terminal strip or framework.

I clalm as my mvent1on:

LA strand or wire adapted to interlock on itself to form a strainer wall, substantially as described.

2. A strainer wall composed of parallel interlocking strands between which 'the water is admitted, substantiall as described.

V3. As a new article of manu acture, a stri or wire having longitudinal grooves an anges constructed .to interlock with the anges and grooves of a corresponding parallel strip or portion to form a strainer wall, substantially as described.

4. As a new article of manufacture, a stri or wirev having a series of perforations an longitudinal grooves and langes constructed to interlock with the flanges and grooves of a corresponding parallel strip or ortion to form a strainer wall, substantie ly as de-- scribed.

5. A strainer wall composed of adjacent tweenwhich the water -is admitted, substantiallfr as described.

6. A strainer wall comprising overlapping portions co1' strips of wire forming in effect interlocking portions or strips `of'wire be- .formed of a spiral Winding having overlap.

outer and inner Walls, a water admitting crevice being provided between the stripsin the outer wall, andthe inner wall being provided with perforations communica/tin@ with said crevice, substantially as describe 7. A -well strainer comprising a' spiral winding having interlocking convolutions between which the Water is ad1nitted,vsub s tantiallyas described, l

8. A well strainer comprising a.A spiral winding having overlapping convolutions forming in effect a cylinder having outer and inner walls, a water admitting crevice being provided between the convolutions in the outer wall, and the inner wall being provided with perforations communicating with said fcrevice, substantially as described.

9. A well strainer formed of a spiral winding of interconnected convolutions provided with water passages, substantially as and for 1 the purpose set forth..

10. A well strainer comprising a-cylinder ping convolutions provided with grooves and flanges interiitting with each other in adjacent convolutions, and inlet a erturesfextending through the wall of t e cylinder, substantially as described.

,11. A strainer wall composed of parallel interlocking lengths of Wire having longitudinal grooves and flanges constructed to interlock in adjacent lengths, and perforations in said wire. forming Water passages,

substantially as described.

12. A Well strainer formed of a spiral Winding provided with Water passages and having overlapping convolutions rovided with grooves and flanges interfitting with each other in adjacent convolutions and spun or rolled together to prevent unwinding, substantiall as describen.

13. A weil strainer com rising a cylindric strainer portion formed o a spiral winding,

the coils being interconnected, and end mpplesto which the ends of the winding are connected, substantially as described.

14. `A well strainer comprising a'cylindric strainer portion formed of a spirally wound wire providedwith an interlocking longitudinal ange and aninterlockin longitudinal oove, and end nipples provi( ed with screw t eads engaging t e spiral grooves and flanges of the strainer portion, substan tially as and for the purpose set forth.

,15. A well.' strainer formed of a spiral winding provided with water passages and having overdapping convolutions ting with each other and spun or rolled together to preventI unwinding, substantially as and for the purpose set forth.

16.. A well strainer formed of a spiral winding of overlapping convolutions pro' vided with water passages, the overlappin portions of the convolutions contacting with each other to maintain the cylindric form of the strainer, substantially as and for the purpose set forth.

In testimony, that I claim the foregoing as my. invention, I atiix my signature 1n presence of two subscribing Witnesses this first day of February, A. D. 1905.

EDWARD -ir..Jorn\iso1\1. Witnesses: i

CHAs. A. STICKNEY, C. C. Jonas.

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