US1156941A - Boiler feed-water regulator. - Google Patents

Description

W. JQ STEVENS.

BOILER FEED WATER REGULATOR. APPLICATION FILED AUG-24. 1914.

Patented (M119, 1915.

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Inventor I I 7 I J Attorneys BOILER mun-Warns aneunaron T 0 all wkome't may oong k j -Be it. known that I, WIL IE Jnnsduldfrnvnzvs, a citizen of the United States, res dlng, at Portland, in the county of Cumberland- 7 this application is a boiler feed water regu- 10 later, and one object of the presentinvention is to provide novel means for'admitting steam into the pipe which forms a connection between the fioat tank and the valve casing. I i p I Anotherobject of theinvention is to improve theconstructionjlof the valve and the", v fluid-pressure cylinderzand the piston which controls the movementsofthe valve; 7

it is within the scope' of the invention to improve generally and totcnhancethe utility of, devices of th attype to the present invention appert'ains.

, With the above and other objects in view which will appearas the description proceeds, the invention resides infthecombination and arrangeInentQofparts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed'can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in '.a single sectional figure, wherein sundry parts appear inrelevation. L

In carrying out the invention there. is provided a tank 1 equipped adjacent'its lower end with a water inlet 2, theiwater 53in the tank 1 'standingat a level indicated by the line 44 which line represents theheight of the water in the boiler (not shown?) 1 .filhe phragm 28,the valve having the usual wings the closure 6, there being a seat 11 formed in the intermediate portion of the bore 9, and the sleeve 8 having steam inlets 12 which form communications between the bore 9 and the interior of the tank 1.

; Specification of rat s Patent.

1 "00., or roarnaivn, AINE.

Manama. is, 1 915.

Arpliea ienfilseeesu ;1 14- 1 S ums- 583 4 a v Mounted'in the tank 1 is a float having a stem 15 which isslidably received in :the bore of the sleeve 8 and is guidedthereby,

'wItLIE JUDSON STEVENS, for role-ennu Ma ns; assrsnon 'ro s rnvnns re entation the-upper end of thestem 15' 'fcotiperating it with the seat-l1 to cut ofl the steam inlets .12. Connected with inclosure 6 is a =gland 16 holding one fend of a pipe 1'] the other end.

"of thepipe 17 ;being connected ibymeans of v gland 18 with a neck 19Qconstitut-ing apart of a cap..20,the' neck 19 being provided thelmechwitha bore indicated at 34E.

The cap 20. .constitutesa part of anism for controllingfthe admissionvalve hereinafter described,.-and with this end in view, the cap-2O isthreaded as indicated at p v port 23,-the cylinder 22 includingian ,exten- 21 upon a cylinder 22 provided withva bleed sion2l threaded as indicated at 25 to a hip- J pic 26' formed upona valve. casing27 having an intermediate, diaphragm {28 equipped "with an opening 29, there being, a valve seat 3,6 in the diaphragm 28' at theylower endof r the-opening A plug 31 isthreadedinto the bottom of the valve casing 27, shown j at 32, theplug 3:1;having an axial passage 3,3, 'A piston structure operates in thelcyl- ,inder 22, the piston: structurecomprising a piston head35, having a concavity36 in its "upper face, valvestem 37 is threaded into the head 35, as indicated at :38 and may be held in place for adjustment by ineansof a nut 39., A compression spring 40" abuts against the lower face of the piston head 35 and against the upper face of the bottom fll :ofthe cylinder 22,. The valve stem37 is gS lidably received in the bottom 41 .of the cyl- 'inder 22 ,and is guided therebyi the stem '37- being slidably received in and guided bythe bore 42 of the nipple 26. Secured to the valve stem a valve t3 wh ch isupwandly r v able-to register'in theseat BO of the .dia-

44:, serving to guide the valve, but permitting the fluid to pass through the opening 29 when thevalve is depressed- The lower end 45 of the stem .37 is reduced in diameter and is slidably received in the axial passage 33 of the plug 31; A compression spring 46 surrounds the lower end 45 of the valve stem.

and abuts against the plug 31" and the and thus a steam; which is within the tank 1 will pass through the steam inlets 12 and enter. the

pipe 17 by way of the part of the bore of the sleeve 8, the steam being admitted from the pipe 17Vupon top of the piston head 55, the concavity indicated at 26 serving to afford sullicient pressure area upon the piston head; W hen the piston head 35 is'thus subjected to fluid pressure, thestem '37 will be forced downwardly, moving the valve l3 or? the seat in the diaphragm :28, passage will be established through the valve casing27. By the operation above described, the springs 40 and 46 will be put under OOII1P1BSS10I1, and so soon as the water has risen suiiiciently in the tank 1, the stem 15, cooperating with the seat 11 i will cut off the fluid pressure pipe 17. Ow-

ing to condensation in the pipe 17 and under the assisting action-of the compression springs 46 and &0, the stem 37 will move upwardly and the valve 13 will engage again in the seat 30. i

' It is to be observed that the piston head 35 abuts against the cap 20 simultaneously with the engagement between the valve and the seat 30. The utility of this operation resides in the fact that there is no tendency' for the valve L3 to be strained or broken off, should the same close somewhat abruptly. The position of the piston head 35 on the stem 37 may be adjusted because, as indicated at 38, the head is threaded on the stem, the head being held in adjusted positions on thestem by means of the nut 39. This operation permits the head 89 to be adjusted with respect to the valve 4:?) so that when the head 35 is in abutment with the cap 20, the valve 13 will be engaged with the seat 30. v

It is to be observed that the plug 31 exercises three functions. First, it constitutes means whereby the valve casing 27 may be opened, to effect a grinding up or a cleaning of the seat 80; secondly, it constitutes a guide for the lower end l5 of the valve stem 37 and third, it constitutes means whereby the tension of the spring'may be ad justed. 7

Having thus described the invention, what is claimed is In boiler feed water regulator, a valve casing having a seat; a cylinder comprising a cross wall; a cap on the cylinder and provided with a fluid pressure inlet; a stem slidable in the cross wall; a valve on the stem and cooperatingwith the seat; a primary sprln'g coactmg with the valve and r the casing to hold the valve seated; a head on the stem, one end face of the head hearing against the cap and the periphery of the head being engaged slidably with the cylinder, the cap having a concavity into which the inlet opens when said end face of the head is in contact with the cap, the head being adjustable longitudinally of the stem to permit the head to abut against the cap when the valve cooperates with the seat,

thereby to reduce the strain on the valve; a

securing means adjustable on the stem and engaging the head to hold the head against longitudinal movement on the stem in the direction of the cap, the securing means being housed in the concavity whereby said end of the head may abut against the cap; and a secondary spring engaging both the head and the cross wall, the secondary spring constituting'an assisting means for the primary spring and constituting also means for holding the headagainst movement on the stem in the direction of the cross wall.

In testimony that I claim the foregoing as my own, I have hereto afliXed my signature in the presence of two witnesses.

WILLIE JUDSON STEVENS.

Witnesses:

DENNIS W. SnX'roN, JAMES NITTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner'of Patents,

- Washington, D. C. I I

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