US729956A - Steam-trap. - Google Patents

Description

No. 729,95@ l r n PA-TENTBD JUNE72,1903.l J

`G. P. MURRAY. STEAMTRAP. APPLICATION FILED HAY 20, 1902..- y

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Patented une 2, 1903.

PATENT OFFICJE.A

CHARLES F. MURRAY, OF DETROIT, MICHIGAN.

STEAM-TRAP.

SPEIFICATION forming partof Letters Patent No. 729,956,'dated J' une 2, 1903.

Application filedV May 20, 1902!. Serial No. 108,225, (No model.)

Michigan, have invented certain new and nse fnl Improvements in Steam-Traps, of which the following is a specification, reference being had therein to the accompanying drawings. Y

The invention relates to steam-traps intended for use wherever it is .desired to automatically discharge the water of condensationfrom the steam-conduit. v

It is the object of the invention to obtain a construction in which theoperating parts are above the water-line, so that there will be less danger of corrosion and the consequent liability of the trap becoming inoperative.

The invention consists in the construction as hereinafter'shown and described, l

In the drawings,Figure 1 is a sectional elevation of the trap. Fig. 2 is a bottom plan View of the cover of the trap, showing the arrangement of the operating parts secured thereto.

A is a vcasing which, as shown,l is Vof oval form and is provided with a central neck B, which is closed at the top by a detachable cover C. The opening through the neck D is of sufficient area to admit the lloat D,.which is employed for operating the valve.

E is a lever fulcrumed in apost F, secured to and depending from the capC. At the inner end this lever is connected to a stem H of a valve H', which controls connection between the interior of the casing and a conduit K, connecting with the aperture through the cap C.

Gris a stem secured at ,its upper end to the lever E and at its lower end connecting with the 'float D.

I is an arm dependingfrom the cover C, which at its lower end carries a'cylindrical guide I for the oat D, adapted to limit its lateral movement.

J is a steam-inlet pipe connecting with the casing A at any suitable point above the normal water-level therein.

L is an outlet-pipe connecting centrally with the bottom of the casin g and having connected therein a valve L. This valve is adapted to be automatically operated whenever the water within the casing A rises above a certain level. The means employed for operating the valve consists of a cylinder M, in whichis arranged a piston N, having a stem O projecting downward. therefrom and out from the cylinder and connecting with a stem- P of the valve L'. The pistonN is preferably of cup` shape andA has arranged therein a spring Q, which at its upper end bears against an adjustable stop R. Y The latter is formed by a screw-threaded stem R', passing through a correspondiugly-threaded aperture in the cap M of the cylinder and held indifferent positions of adjustmentby lock-nuts M2. The stem Ris preferably hollow to form an exhaust-passage from the cylinder Maud may,

if desired, be connected at its upper end to an escape-pipe S. The lower end of the cylinder is connected to the conduitK, leading from the casing A, the arrangement being such that Wheneverv steam ...is admitted into said conduit by the openingiof the valve H' lit will enter the cylinder M below the piston N, causing said piston to'rise and through its stem0 .and connectionwith the valvesteln P to, open the valve L.`

It will be understood that `the valve H will be openedwhenever'thelever E is operated by the upward push of the stem G and float D, and the latter will rise whenever the level of the water within the casing A rises above normal. Thus Whenever the condensation entering the casing through the inlet-pipe J raises the water-level sufficiently the valve L will be opened in the manner just described, which will allow the water within the casing to pass out through the conduit L. To gage the outow of water, a valve T is preferably arranged intermediate the valve L and the casing A. As shown, this valve is in the form of an angle-valve arranged at the point of connection between the conduit L and casing A, the latter being preferably supported by feet U, which raise it a sufficient distance above its support to permit of the operation of said valve. When the water-level within the casing is lowered sufficiently to permit the valve I-I to again close, steam will be shut off from the conduit K and cylinder and that which still remains within the cylinder will slowly leak around the piston Nand exhaust through the tubular stem R and exhaustpipe S. At the same time the tension of thespring Q will cause the piston N to descend, thereby closing the Valve L.

It will be noticed that all the operating parts Within the casing A are connected to the detachable cap C, so that they may be readily removed for adjustment, repair, or lubrication. It will also be noticed that the Vlever and valve are at the top of the casing, Where they will be within the dry-steam space, so that corrosion is prevented.

What I claim as my invention is A steam-trap comprisinga casing having a contracted neck at its upper end and provided with inlet and outlet connections, a-cap

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