US 730465 A
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' PATENTE-JUNE 9, 1903 H. LADISLAW an L. SGAL. f
AUJOMATIG FEEDING REGULATOR FOR STEAM BOILERS.
' PPLIUATION num Dnc. 11, 1900.
UNITED STATE-s ratented'rune 9,1903.
PATENT *Ormea HEINRICH LADISLAWVAND LUDWIG SGAL, OF VIENNA, AUSTRIA- HUNGARY.
AUTOMATIC FEEDlNG-REGULATOR FOR STEAM-BOILERS.
sPECIFIcATIoN forming par: of Lettere Patent No. 730,465, dated June 9, 1903.
Application iiled December 17, 1900, Serial No. 40.161. (No model.)
To all whom t may concern:
Be it known that we, HEINRICH LADISLA and LUDWIG SGAL, subjects ofthe Emperor of Austria-Hungary, residing at Vienna, in the Province of Lower Austria, in theEm pire of Austria-Hungary, have invented certain new y and useful Improvements in Automatic Feeding-Regulators for Steam-Boilers; and we do hereby declare the following to be a full, clear, and exact description of theinvention, such as willenable others skilled in the art'to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.
This invention has relation to automatic boiler feed-regulators; and its object resides in simplifying the construction, and thereby increasing their stability and efliciency, as will now be fully described, reference being had tothe accompanying drawings,in which- Figure l is a transverse section ofthe regulater, showing its connection with a boiler; and Fig. 2 is a longitudinal sectional View thereof.
The regulator consists, essentially', of a horizontal cylinder c, in which Worksa piston P, connectible with or secured to the plungerrod r of a feed-Water pump of any desired construction, (not shown,) said cylinder being connected to the boiler at dilferentlevels. To this end the cylinder has two branches Z7 b', leading from its lowest point about midway of its length or midway ot the stroke of the piston. The branch b is connected to the boiler B Iby a pipe p on a line with the normal level I', of the water in said boiler, and the branch b' is connected to said boiler by a pipe j o at a point below said normal waterlevel. v Y
The operation is as follows: As long as the water-level is normal or slightly above normal the cylinder c will be full of -boiler-wa ter,
' forced into the same by steam -pressure through pipes pp', thereby antagonizing the movements of the piston P and therethrough the 'movements of the pump-plunger, the stroke of which is shortened or its movement completely stopped, thereby reducing or stop' ping the supplyof Water to the boiler. When, on the contrary, the level of the water in the boiler B falls below the normal level l, steam is free to dow to the cylinder through pipe p, driving the water into the boiler through pipe p' and filling the cylinder, thereby balancing the pressure on opposite piston-faces and enabling the piston to Work at full stroke, which corresponds to the full capacity of the pump, thereby supplying 'waterto the boiler until the normal levelZ has again been reached, when wat-er will again be forced into the cylinder c and the stroke of the piston P reduced or its movement stopped.
- In order that the described operation of the regulator may take place, the piston P Ashould necessarily be of such adiameter rela- Vof smaller diameter than the internal diameter of said cylinder has the advantage of a.
saving of labor in that the work of truing the contacting surfaces of the piston and cylinder to cause them to work fluid-tight or the packing of the piston are avoided. Inasmuch as it is not necessary that the piston should work Huid-tight in the cylinder, we may employ a piston that works substantially duid-tight therein, or, in otherwords, a piston of such diameter 'as to leave practically little or no clearance between it and the cylinder, and yet dispense with the labor of truing the contacting surfaces or of packing the piston. In this case means are, however, necessary whereby the distribution of duid toopposite sides ot the piston is eected as rapidly as possible. This we accomplish by forming-in the cylinder-Walls, midway ofV its ends lor at the halt-stroke point, an annular chamber c' of greater diameter and cross-sectional area than the diameter and peripheral cross-sectional area of the piston P. With this construction and supposing the piston P to be on the right-hand side of said annular chamber,
Fig. `2, at the time steam flows through pipe- IOO p into said chamber the water on the left of the piston will be driven into the boiler by the pressure ofthe steam through pipep', and as soon as piston I" has moved to the lefthand side of the chamber c steam will also be admitted to the right of the piston and water from that side of the cylinder driven into the boiler by the pressure of the steam. The pressure of the latter ou opposite faces being now balanced, the pump can Work at full stroke. ThesarneoperationWouldtakeplace if the piston were on the left-hand side of chamber o at the time when steam is admitted to said cylinder. Like operations also take place in respect of the admission of Water to the cylinderc when the level of the water in the boiler has risen to or slightly above the normal Water-level Z Whether the piston is on one or the other side ofthe annular chamber c'. lf, on the contrary, the piston is at half-stroke and in line with chamber c', as shown in Fig. 2, at the time steam or Water is admitted to the cylinder such fluid will then flow to opposite sides of the piston at the same time. This chamber o' is, however, also of advantage with a piston of less diameter than the internal diameter of its cylinderin that the fluid admitted is more rapidly distributed to either side of the piston, as will be readily understood.
Having thus described our invention, what we claim as new therein, and desire to secure by Letters Patent, is-
l. An automatic boiler-feed regulator comprising a horizontal cylinder, means for connecting the same at a point intermediate of its ends to a boiler at a point in line with the normal level of the water therein and at a point below said level respectively, a piston in said cylinder connectible to the plunger of a feed-water pump, and means admitting steam or water to either side of said piston according as the level of the water in the boiler falls below or rises to or above its normal level, substantially as set forth.
2. An automatic boiler-feed regulator comprising a horizontal cylinder, means for connecting the same at its lowest point and intermediate its ends, to a boiler at a point in line with the normal level of the Water in said boiler andat a point below said level respectively, a piston in said cylinder connectible to the plunger of a feed-water pump, and means admitting boiler-steam or boiler-Water to eithe'r side of said piston according as the level of the water in the boiler falls below or rises to or above its normal level, substantially as set forth.
3. An automatic boiler-feed regulator comprising a horizontal cylinder, its piston adapted to control the movements of a pump-plunger, said cylinder provided intermediate its ends with an annular chamber of greater diameter and cross-sectional area than the diameter and peripheral cross-section of said piston, and means for connecting said chamber at its lowest point to a boiler at a point in line with the normal water-level therein and at a point below said level, for the purpose set forth. p
In testimony that We claim the foregoing as our invention we have signed our names in presence of two subscribing Witnesses.
LUDWIG SGAL. lVitnesses:
JOSEF RBRESCH, ALvEsTo S. HoGUE.