US894102A - Automatic valve. - Google Patents

Description

No. 894,102. PATENTED JULY 21, 1908.

J. G. BANJOOK. AUTOMATIC VALVE.

APPLIGATION FILED MAR. 25, 1907.-

2 SHEBTSSHEET 1.

[TI L;

PATENTED JULY 21, 1908.

J. G. LLJJOCK AUTOMATIC VALVE.

APPLICATION FILED MAR. 25, 1907.

2 SHEETSSHEET 2.

u M a 1 t tional view Fi 1. to Fig. 3, but showing a modified form of the JOHN G. BANJOCK, or ZEHNER, PENNSYLVANII'A.

Y AUTOMATIC vALvn'.

Specification Letters Patent.

Patented July 21, 1908.

Application filed March 26, 1907. Serial No.'864,468.

To all whom it may concern:

Be it known that I, JOHN G. BANJooK, a citizen of United States, residing at Zehner, in the county of Luzerne, State of Penns lvania, have invented certain new and usei ul Im rovements in Automatic Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to so-called automatic or self-o erating steam-valves.

It is the object of the invention to provide a valve of the kind mentioned that may be so arranged as to govern the energy with which the blower for the fire in a steam-engine operates to keep the heat, or fire, and consequently the steam generated, at a regular redetermined de ee, the said valve and lower virtually ta ing the lace of the usual steam-governor for control ing the speed of the engine, incidentally to the performance of its other functions.

The nature of the invention is ascertainable from the degree of novelty portrayed in the annexed drawings, forming a part of this s ecification, in view of which it will first be d escribed in detail with respect to its construction andmode of operation and then be pointed out with particularity in the suboined claims.

Of the said drawingsFigure 1 is a front view. Fig. 2 is a side view. Fig. 3 is a sectaken in the plane 33, Fig. 2. ig. 4 isa transverse section on line 4 4, of

Fig. 5 is a vertical elevation similar device. 1

Similar numerals of reference designate similar parts or features, as the case may be,

wherever they occur.

While in the following specification my invention will be described as applied to steamengines for the purpose of regulating the energy or speed with which a blower of a steam-boiler may be operated, it will appear obvious that the improvements may be employed for any other purpose, to regulate steam pressure or indicate the variations in speed ressu're' in a boiler.

In t e drawings, having reference first to Figs. 1 to 4, inclusive, designates the shell provided with hollow horizontal extensions 11 and 12 interiorly screwthreaded for the reception of] ipes, said extensions forming inlet and oulil the inlet 11 u et passages or ports, respec tively, for steam from the boiler. is provided with a vertical opening, 13, through it, joining the inlet and outlet ports at a point between the same. The bottom portions of the vertical opening is provided with a valve seat, 14, and

treme lower end by a plug, 15. In the upper portion of the vertical 0 ening there is a valve, 16, having a vertical stem, 17, by means of which it may be raised and lowered to limit the extent or area of the passage 18,

The shell which joins the inlet and outlet ports, or close it entirely.

19 designates a steam cylinder provided with a piston chamber, 20, at its upper end and havin its lower end extended and connected wit the upper extensions, 21, of a connecting plate, 22, the lower extension, 23, of which has a screw-threaded connection with the casing, 10. The piston chamber 20 is divided from the lower part of the cylinder 19 by a partition, 24, which is provided with a stuffing-box, 26, through which, and through a stufling-box 27, in the partition plate 22 the stem 17 of the valve 16 extends 1n its rojection into the steam-ohamber 20.

27 esignates a regularly-packed piston secured on the upper end of the valve-stem 17, and having a steam-tight fit in the steamchamber 2 25 designates a spring interposed between the bottom of the piston 27 and the bottom the piston 27 upward, carrying the valve 16 with it and thus opening the passage 18 between the inlet and outlet ports 11 and 12 from the steam-boiler, (not shown). 7

29 designates a steam-pipe leading from .to and over the top of the ich it enters at the center of its covered top 30. The pipe'29 is provided with a valve, 31, of ordinary construction, which controls the volume of steam entering the chamber 20 above the iston 27. Under the construction t us far described it will be understood that the steam passing from the steam-boiler through the ports 11 and 12 and intermediate passage way 18 will be conducted to the engine that operates the blower for the fire of the main engine, and that the amount of steam passing through to the blower-operating means willdepend upon the extent of the opening of the passage 18 between the ports 11 and 12. Moreover, it willbe understood of the port chamber 20 w 18 will depend upon the position 1s closed at its exof the chamber 20, and operating to press thatthe area or extent course the pressure u of the valve 16. I If said valve is raised to its fullest extent the passage 18 will be opened to its full extent and consequently the maximum amount of steam will be admitted through the ports 11 and 12. On the other hand if the valve should be nearly closed down to its seat 14 but little steam W111 be admitted through said ports; and if said valve should be fully closed upon its seat 14 the steam will be shut off entirely from passing through the port 11 and 12, and consequently the blower will cease to be operated;

The valve 12 is regulated as to its position by the. degree of pressure of the steam admitted to the chamber 20 of the cylinder 19 through the pipe 29. If said pipe is flinlly openedthe steam entering the port 11 l pass,up through the pipe 29, and into the chamber 20 depressing the fpiston 27 and valve stem 17, the extent 0 which depression will depend of course upon the pressure of the steam in the said chamber 20.1.2

When the steam is low in the boiler of on the piston 27 in the chamber 20 will be ighter than when the steam is at a higher pressure in the boiler,

and hence there will be less pressure on the top of the Ipiston 27 and the valve 16 will be raised by t e action of the spring 25, opening the assage 18 between the ports 11 and 12 and eaving therethrough a larger volume of steam to operate the blower at a more rapid rate so as to brin u the fire and consequently the steam 1n t e boiler. As the latter rises the pressure in the chamber 20 will be increased and the valve 16 operated to gradually shut ofi the degree of steam assing through the passage 18 until, it may e, the said assage 1s entirely closed. In this way it willbe noted that the device shown and described will automatically operate to regulate the pressure of steam'in the boiler and through the regulation of the energy with which the blower is operated consequently the invention may take the place of an ordinary governor for a steam engine.

It is to be understood, of course, that in the explanation of the foregoing mode of operation of the invention, it is to be kept 1n mind that the area of pressure on the bottom of the valve 16 is less than on the top of the piston 27 to depress it. 1

In Fig. 5 I have shown a difierent form-of the invention, but in which the general principle remains the same. In said view the pipe 29 extends vertically up from the pipe 11 leading from the steam-boiler into t e inlet 11 of the casing 10. The said pipe 29' being arranged in a horizontal instead of avertical position. The piston 27 is arranged inthe cylinder with the spring 25 in its opposite end and acting between the spring and the outer end of its chamber. In this case seams the piston stem-a extends through a stufiing box in the inner end of the'cylinder, and is constructed as a rack b su ported to slide in the upper end of an uprig t, c, and isin engagement with an elongated gear d on the stem 17 of the valve 16. The said valvestem is provided with an external screwthread 0 which engages an internal screwthread in the partition-plate 22, so that as the piston 27 is moved in the cylinder 19 it will screw the valve 16 up and down toward its seat 14 which is arranged in a partition f in the passa e 18 connecting the ports 11 and 12 and regu ate the extent of said passage as before described, for the same purpose. I A hand-wheel g is secured on the u per end of the valve-stem 17 for operating the valve 16 by hand when desired, and a brace 4 extends up from the casing 10 to assist with the pine1 29in su porting the steam-cylinder 19. Fig. 6 t e pipe 29 is shown as extending vertlcally up om the inlet port 11 and as entering the steam-cylinder below the. piston 27- and o crates on the said valve to press it upwar in the chamber 20. Instead of employing aspring, 25, to ress the valve down against the pressure of the steam below it, the valve 16 is extended as at "i, and is provided with a lateral passageway. through it. To the lower end of the extension 4'. of the valve there is a stem is connected with its lower end to hold the piston 27 against the operation of the steam on the piston in substantially the same manner as the spring.

The foregoing modifications show the changes that may be made in the mere-form and arrangement of parts without departing from the nature or spirit of the invention.

What is claimed is- An automatic valve comprising a main casing having an inlet opening andoutlet' casing, said inlet and outlet openings having a connecting passage intersecting'the bore of the casing, a valvedisposed in the bore of the casin and movable into and out of position to c ose said passage, a piston in the cylinder, a rod common to 'and' connecting t e piston and valve, a g'spring disposed to hold the piston 'yieldingly with the valve in open pos1tion,-a by-pass connecting the inlet opening of the casing with the end of'the cylinder and .a lug removably engaged'in' the lower end of the bore of the casing;

In testimony whereof, Ihfiixfmy signature, in presence of two witnesses.

' JOHN] G. BANJOCK. Witnesses: i EMERsoN, HOUSEKNEOHT,

FRED Fox.

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