US730547A - Steam-boiler feed. - Google Patents

Description

No. 730,547. l PATENTBD JUNE 9,'1903.. G. W. MAUDOUGAIL.

STEAM BUILER FEED.

APPIJIOATION TILED JUNE 2, 1902.

` IATEN'IED JUNE 9, 1903. G. WJMAUDQUGALL.

STEAM BOILER FEED. APPLIoATfoN FILED ,mlm 2. 1902.

2 SHEETS-SHEET 2.

NO MODEL.

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' a pipe 4, which is connected with the steam- Vspace of the boiler, (not shown,) and through steam is supplied to the lowermost UNrrED STATES Patented June 9, 1903.

PATENT. OEEICE.

sTsAMf'BolLER-'Fl-:Ed

SPECIFICATION forming part of Letters. Patent No, 730,547, dated .Tune 9, 1903. Application met June 2, letz. senti No. 109,944. (No man.)

To all whom, t may concern: y

Be it known that I, GEORGE W. MACDOU- GALL, a citizen of the United States, residing at Boonton, in the county of Morris and State of New Jersey, have invented certain new and useful Improvements in Steam-Boiler Feeds, of which the following `is a specification.. l

This invention relates lto new and useful improvements in boiler-feed devices; and it has for its objects, among others, to providev a simple, cheap, and efcient boilerfeed having provision for the return Y of condensed steam to the boiler.

.It has for a further object to provide an efficient device of this character which shall be automatic in its operation, requiring no attention upon the part of the attendant, not liable to get out of order, and readily applied.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the appended'claims. i

The invention is @leariyniustmted in the.

accompanying drawings, which, with the nul meralsof reference marked thereon, form a v part of this specification, and in which- Figure 1 is a substantially central vertical section showing my improvement with the pistons at their uppermost limit. Fig. 2 is a similar view showing the position of thel parts when the pistons are at their lowermost stroke. Fig. Sis an enlarged detail in section, showing the piston-valve and itschamber.

Like numerals of reference indicate like:

parts throughout the different views.

Referring to the drawings, 1 designates a cylinder, having a detachable bottom 2, the inner wall of which is preferably tapered toward the center, and there it isprovi'ded with a screw-threaded boss 3, into which isscrewed this pipe chamber of the cylinder, and through the said pipe the condensed steam is returned to the boiler.

5 is a piston-,rod to which are secured the three pistons 6, 7, and 8. The pistons 6 and 7 are adapted to move Within the cylinder 1, While the piston 8 is disposed to move within the separate lcylinder 9. These pistons are designed to move water-tight lwithin their cylinders, being provided with suitable peripheral packing-rings 10 for this purpose.

11 isa connection between the lower portion of the cylinder 1 and the upper portion. The cylinder 1 has a detachable head12 with a screw-threaded boss 13, into which is screwed the return condensatiompipe 14.

The'piston-rod 5 Works through a suitable stuffing-box 15, and outside the cylinder 1 it is provided with the tappets or collars or the like, 16aud 17. Within the cylinder 9 are the stops 17, against which the piston 8 is adapted to contact to limit its vupward movement, while Within the cylinder 1, near its lower end, are the stops 18, which are designed to limit the downward movement of the pistons by the contact of rthe piston 6 therewith, all as will be readily understood from the drawings.

19 is an exhaust-pipe leading from the cylinder 9 at a point somewhat below its midheight. t

The cylinder 9 is provided with a detachable head 20, 'suitably packed, and connected Awith this cylinder 9 near its upper end. is a pipe21, the lower end of which is connected by elbow 22 with the pipe 23, which communicates with the piston valve cylinder 24, which is arranged within the pipe 25, the lower end of which is connected by elbow 26 with the pipe 27, which is threaded into a threaded boss 28 on the cylinder 1 just above the' stops .1S thereof, all as clearly illustrated inthe drawings. i

The piston-valve cylinder 24 is disposed within the pipe near its upper end and has an opening 29 in its lower end and an opening 30 in its upper end. 3l is apiston-valve mountedto reciprocate in said piston-valve chamber or cylinder and is provided near each end with a spring-ring 32 to form a tight joint with the walls of the cylinder, as shown. This cylinder may be supported Within the this stem at its outer end, as at 35, is a lever 36, which is pivotally mounted between its ends, as at 37, on an upright or bracket 38,

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` is as follows: As shown, the pistons are all at their uppermost stroke, being thus limited by the stops 17 in the upper portion of the cylinder 9. In this position the space 39 in the cylinder 1 below the piston 6 and the space 40 in the cylinder 9 above the piston 8 are both full of live steam from the boiler, balancing them. Hot water is now running through the pipe 14 on top of the piston 7, that will overbalance the pistons, causing them to move downward until the piston 6 contacts the stop 18 near the lower end of the cylinder l, when the pistons will be arrested in their downward movement. As the pistons move downward the collar or tappet 16 on the piston-rod will strike the lever 36 and moving its free end downward will move the piston-valve 3l upward to close the opening through the pipe 23 into the valve-cylinder 24. The piston 7 will uncover the upper end of the pipe 11, and the piston 6 will cover the opening in the lower end of said pipe or receiver 11, when the Water lying on top of the piston will run into said receiver. Now the opening from the pipe 23 into the valve-cylinder 24 being closed by the valve-piston 31 there is no steam passing through the pipe 21 into the cylinder 9, and what steam `was in said cylinder 9 above the piston has been exhausted through the exhaust-pipe 19. The space 39 beneath the piston 6 is always full of steamat boilerpressure and will force the pistons 6, 7, and 8 upward until the upper piston is engaged The collar by the stops 17 in the cylinder 9. 17, engaging the free end of the lever` 36,

forces the same upward, and this moves the piston-valve 31 downward, opening the comy munication between the pipe 23 and the cylinder 24, and steam passes through the pipe 21 onto 'the top of the piston 8 and balances the piston again. The openinginto the lower end of the pipe or receiver 11 is again opened and the upper end closed, thus letting the water out of said receiver or pipe 11 down through the opening in the lower end of the cylinder 1 and through the pipe 4 into they boiler. Thus the operation is automatically repeated.

Modifications in detail may be resorted to one cylinder to the other by the movement of said pistons.

2. The combination of two independent cylinders, a piston-rod common to both, pistons in one cylinder, a piston in the other, a connection for one cylinder to the other and a valve automatically controlling the iiow from one cylinder to the other by the movement of said pistons and a connection from the boiler to the lowermost cylinder.

3. The combination of two independent cylinders, a piston-rod common to both, pistons in one cylinder, a piston in the other, a connection for one cylinder to the other and a valve automatically controlling the iow from one cylinder to the other by the movement of said pistons, and a connection from the boiler to the lowermost cylinder, and a connection between the opposite ends of said cylinder.

4. The combination with a cylinder and two pistons therein and an independent cylinder with a piston therein, of a piston-rod common to all of said pistons, a connection between said cylinders, a piston-valve controlling said connection and means actuated by the movement of the ypiston-rod to actuate, as set forth.

5. The combination with a cylinder and two pistons therein and an independent cylinder with a piston therein, of a piston-rod common to all of said pistons, a connection between said cylinders, a piston-valve controlling said connection and means actuated by the movement of the piston-rod to actuate, an exhaust from one cylinder and a connection between opposite ends of the cylinder.

6. The combination with two separate cylinders, pistons in one of said cylinders and a single piston in the other and a piston-rod common to all, of a communication between said cylinders automatically controlled by the movement of said rod.

7. The combination with two separate cylinders, pistons in one of said cylinders and a single piston in the other and a piston-rod common to all, of a communication between said cylinders automatically controlled by the movement of said rod and stops within said cylinders for limiting the movements of the pistons. p

8. The combination with two separate cylinders, pistons in one of said cylinders and a single piston in the other and a piston-rod common to all, of a communication between said cylinders automatically controlled by the movement of said rod and stops within said cylinders for limiting the movements of the pistons, and a connection between the opposite ends of the lowermost cylinder alternately opened and closed by the piston therein.

9. The combination with the cylinders, ar-

ranged in line one small and the other larger,

a single piston-rod for both cylinders, a single piston in one cylinder, a pair of pistons in the other cylinder all mounted on said piston-rod, of tappets on said rod, a connection between said cylinders, a valve controlling said con- IOO IZO

neotion, and alever pivotally connected with the stem of said valve with its free end dis the stem of said Valve with its free end disposed in the path of Said tappets, and a, valveposed in the path of Said tappets. Y cylinder within the connection between the 10. The combination with the cylinders, artwo cylinders. 15 5 ranged inline one small and the other larger, In testimony whereof I afx my signaturev a single piston-rod for both eylindeijs, a single in presencel of two Witnesses.

piston in one e linder, a, pair of istons in the 1 other eylinderll mounted on salipd piston-rod, GEORGE W MACD OUGALL of tappets on said rod, a connection between Witnesses: lo said cylinders, a valve controlling saidcon- SAMUEL TUCKER,

neetion, and a lever pivotally connected with FRANK J. YOUNGS.

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