US86341A

US86341A - Improvement in steam-generator safety-valves

Info

Publication number: US86341A
Authority: US
Publication date: 1869-02-02
Anticipated expiration: 1886-02-02

Description

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JOHN ABSTERDAM,

Lette/rs Patent No'. 86,341, dated Februar/ry 2, 186? or NEW YORK, N. Y.

IMPROVEMENT IN STEAM-GENERATOR SAFETY-VALVES.

The Schedule referred to in these-Letters Patent and making parl: of the same.

To all whom fit ma/y conce/m 4 Be it known that I, JOHN ABSTERDAM, of the city, county, and State of New York, have invented a new and improved Hydrostatic Safety-Valve; and I do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in whichdrawing- Figure 1 represents a longitudinal vertical section of this invention.

Figure 2 is asectional plan or top view thereof.

Similar letters indicate corresponding parts;

'lhe nature of this invention consists in the arrangement of a hollow lever furnished with or forming a hollow weight, in combination with a valve, and with a pipe extending down into the boiler, to the mean water-level, and up through the valve, connecting with the hollow lever in such a manner that a hydrostatic safety-valve is formed, the' valve being held down in its seat by thev weight of the hollow lever, together with the weight of the water filling the same, as long as the pressure of the steam does not exceed the desired limit, and the water in the boiler does not sink below the mean water-level or the mouth of the pipe, but as soon as the water in the boiler sinks below the mean water-level, the water contained in the hollow lever and shell runs back into the boiler, and thereby the valve is relieved and allowed to open.

An adjustable counter-weight serves to set the safetyvalve to any desired pressure.

A represents the shell of asteam-boiler, to which is secured the seat ce for the valve b.

This valve connects, by a rod, c, with the fulcrumpin d, which has its bearing in astandard, e, and it is bored out to receive the pipe fand the tubular or hollow lever g.

The pipe f extends through the valve-seat down into the boiler, and its mouth is at a level with ,the mean water-line of the boiler, so that when the water in the boiler rises to or above the meanv water-line, said pipe is closed against the steam, but if the water in the boiler sinks below the mean water-line, the pipe is open, and the steam from the boiler has free access to the same.

The hollow lever g connects, through the holes in the valve b, with the pipe f, and it is provided withv'aiollow shell, h, to which is attached an air-valve, n,'so that when the steam is generated in the boiler, the pressure of the steam will canse the water to rise into the hollow lever g and shell h, and the weight of this Water, together with that of the hollow lever and shell, will hold the safety-valve down into its seat. But when the water' in the boiler sinks .down below the mean water-line, the steam enters the pipe f, hollow lever g, and shell h, causing the water contained therein to How back into the boiler, and the safety-valve, beingv relieved, is forced open' by the pressure of thesteamin the boiler. p The rod c, which forms the connection between the valve b and the lfulorum-pin d, extends beyond said fulcrum-pn, and it forms the support for therbalanceweight lc, which is made adjustable by a screw-thread, or in any other desirable manner.

This balance-weight serves to set the safety-valve to any desired pressure, so that said valve acts precisely like an ordinary safety-valve as long as the waterin the boiler is kept above the mean water-line; but as soon as the water in the boiler sinks below the mean water-line, the safety-valve is relieved, and the steam blows oii, thus relieving the boiler from all dangerous pressure.

To allow the steam to rise with facility into the ho'llow shell h, when the water in the boiler sinks below the mean water-line, l have secured, in the interior ofthe hollow lever g and pipe f, an internal pipe, i,whieh rises up near to the top of the hollow shell, as clearly shown in iig. l ofthe drawing.

I do not claim broadly as my invention the arrangement of a hollow water-weight, in combination with a safety-valve Abut What I claim as new, and desire to secure by Letters Patent, is

1. A hydrostatic safety-valve, constructed with a hollow lever, g; and a hollow shell, h, in combination with a pipe, f, extending into the boiler, to the mean water-line, substantially as shown and described.

2. The balance-weight 7c, in combination with the hollow lever g, shell 7L, valve b, seat a, internal pipe j,

and pipe f, all constructed and arranged substantially.

in the manner set forth'.

'JOHN ABSTERDAM. Witnesses:

HAUFF,

ERNEST F. KASTENHUBER.