US352387A - Joseph h - Google Patents

Description

l(No Model.)

' J.y H.- BANKS.

STEAM TRAP. Nrn-352,387. Elytlatentedlovg, 1886."

N, PETERS Phmunwgmpnlr. wnsmngm u4 a UNTTED STATES' PATENT OFFICE.'

JOSEPH H. BANKS, OF NEW YORK, N. Y.

` STEAM-TRAP.

SPECIFICATION forming part of Letters 'Patent No. 352,387, dated November 9,1886.

Application led April 1, 1886. SerialNo. 197,446.Y (No model.)

To all whom it may concern.-

Beit known that I, J osErH H. BANKS, a citizen of the United States, residing at New York, in the county andState of New York, have invented new and useful Improvements in Steam- Traps, of which the following is a specification.

This invention relates to improvements in steam-traps of that class which vare applied to steam-heating apparatus and serve to return' the water of condensation to the boiler.

' My invention consists, essentially, in a steam-trap embodying in its structure a watercylinder, which receives the water of condensation from the coils, a piston in said cylinder, an auxiliary ,piston which works in a separate steam cylinder, a chamber communicating with the water-receivin g cylinder, a float therein, which rises with the level of water, and a steam-valve, which is moved during the rise of the iioat to admit steaml to both cylinders to edect the working stroke of the pistons. The valve is moved to admit steam to the auxiliary steam-piston for the return-stroke by means of levers which are actuated by the steam-piston, all of which is more fully pointed out in the following specificationv and claims and illustratedin the accompanying drawings, in which- Figure 1 represents a central vertical section of an apparatus embodying my invention. Fig. 2 is a similar section of detail parts.

Similar letters indicate corresponding parts. In the drawings, the letterA designates the water-receiving cylinder, to which the water of condensation is conducted by the return-pipe B of the heating-plant. O is the waterpiston, which works in the cylinder A, and is connected by a rod, c, with an auxiliary piston, O', that fits the bore of a steam-cylinder, D. This cylinder is shown smaller in diameter than Y the water-cylinder, but is of the same length haust-port, e, an auxiliary exhaust-port, c,

and two steam-ports, e2 e3, that are all controlled by an equalizing slide-valve, E', having considerable lap at one end. As shown in the drawings, thesteam-cylinderis connected with the ports c2 e3 by steam-pipes' E F, respectively, one at the front and the other at the rear end of the. cylinder.

Thefwater-cylinder A is in communication with the valve-chamber through port e3 and a steam-pipe, F2, which latter is connected to the steam-pipe F, so that when the valve E opens port e3 live steam is admitted to both y a branch, g, so that the water of condensationl enters this chamber to raise the oat after a sufficient quantity of water has accumulated to fill the cylinder. nected directly to the valve E, so as to move the same on its seat as it rises; but for reasons to be presently stated I cause the float to operate an auxiliary slide-valve, I, which is situated in a valve-chest, I', and controls an exhaust-port, t', and steam-ports M2, leading to an auxiliary cylinder, J. In this cylinder J is tted a piston, J', which is connected with the valve E by a rod, j, and such connection is made adjustable, as usual, by means of a nut engaging a thread on the rod j. The auxiliary cylinder is closed steam-tight from the valve-chest E, and a stuffing-box prevents leakage about the rod j.

Steam is admitted to the auxiliary valve I by a small branch pipe, b', communicating with the steam-pipe B', and when the valve I- opens one of the ports t" t2 steam enters the auxiliary cylinder J and moves the piston therein, whereby the equalizing-valve E moves on its seat to admit steamfrom the steam-pipe B to the cylinders Aand D, or to the cylinder D, as stated. To move this auxiliary valve I on its seat as the float rises, I swing the float from a rock-shaft, Z, and an arm, L, rigidly secured to this rock-shaft is connected by a link, M, with an arm, L', that is rigidly attached to This ioat G may be con-@7 5 a rock-shaft, Z', which extends into or through the valve-chest Vl' and carries an arm, L2, en.- gaging with the'auxiliary valve. The arm L' is not directly secured to the link M, asin such a case it would be vibratcd to move the valve as the float falls, but carries a pin, Z3, which engages a recess, m, in the link, so that if the link M is swung upwardly about the arm L said link is thrown out of engagement with the pin on thearm L', and consequently the float can fall without moving the arm.

To throw the link M out of engagement with the pin Z", the piston C' engages, when near the end ofits forward stroke,with afinger, N3, which is carried by a rock-shaft,n, and

extends into the cylinder D in a position to the cylinder A.

be engaged by said piston. An arm, N2,which is rigidly secu red to the rock-shaft, is connected bya link, M', with one arm, N, of alever, NN', that is loosely secured to rock-shalt l', and can turn about the same as afulcrum without causing rotation of said shaft. The other arm, N', of this lever is in contact with the freeend of the link M, so that when the piston C' engages finger N3 the arm N' engages the link M and raises it upward to clear the arm L',which allows the float to fall. As the motion of the arm N continues a pin, u'fthereon engages with the arm L'and swings the same aboutits fulcrum, whereby the valve is moved to open port il', which consequently causes port e2 to be opened, and steam is admitted in front of piston C'. To return the lever N N' and also Athe finger to their normal positions, one end of a spring, S, is connected with the link and the other end to some suitable portion of the apparatus.

In arranging the steam-fitting for the trap, the return-pipe P is connected with the watercylinder A5 by a branch, b, which is located between two check-valves, b2 b3, opening in the same direction, so that the water of condensation lifts check-valve b2 and enters the cylinder.

To relieve the pressure on the water as it gradually ills the cylinder, a small vent-pipe, P, is led from the top of the float-casing G and connected with the auxiliary exhaust-port e' of the steam-chest E, which port isin communication with the main exhaust-port e, while the water accumulates in the cylinder, Fig. 2.

To save the exhaust-steam from behind pis,- ton G,asteam pipe,G2, is led from the rear head of the cylinder to the branch pipe b, which pipe is provided with a check-valve opening toward the pipe b. To save the exhaust from behind piston C', the port e3 is kept closed by the lap of the valve E', as shown by dotted lines in Vllig. l and full lines in Fig. 2, so that the eX- haust-steam cannot escape in this direction, but finds its way through pipes F and Fz to In'the drawings the apparatus is shown by the full lines, Fig. l, in the operation of eX- pelling the water of condensation which had accumulated in the cylinder, and the pistons C C' are moving in the direction of arrow l.

The float is in its highest positionand the valve I opens port il, and live steam is entering the cylinder D through pipe F', and cylinder A through pipe FZ, so that the full boiler-pressure is on both sides of piston C and on one side of piston G.' rlhe exhauststeam from cylinder D escapes through pipe F and port e2. As the pistons C C' advance to the end ofV their working stroke, piston C' engages finger N' and the auxiliary valve I s caused to open port i', whereby valve E' is moved into the position shown by dotted lines in Fig. l, and in full lilies in Fig. 2, in which position ofthe same port c2 is open,port e3 closed, and the exhaust-ports ee' are in coinmunication. cylinder D only and drives the pistons on their return or non-working stroke. rlhe exhaustsleam from cylinder D makes its way through pipe F' to cylinder A,and from thence through pipe Gr2 to the receiving end of' the cylinder. Exhaust-steam from the cylinder A also passes to this end ofthe cylinder throughpipe G2.

' In moving the valve Ion its seat to open port i' for the return-stroke of the pistons,the arm N oflever N' is vibrated,as stated,and lit'ts the link M, whereby the pin Z3. of arm- L' is cleared from the Vrecess on and the float falls. f

The arm N' now engages the ar'm L' and the valve l is moved to open port 'i'. The spring returns the lever N N to its original position as soon as piston C' releases the linger N3 and the link Mfalls and rests on pin l3 of arm L'. .As the lioat rises with the accumulation of water the link M is moved forward, and finally recess m engages pin 3, and the valve I is moved to open port i2. As the full boilerpressure is on both sides of piston G whilethe trap is feeding to the boiler,the total force acting against the water in the cylinder is in excess by the force exerted by the steam on the small piston G',less the friction of theworking parts. By properly proportioning the piston C' the trap can serve to lift the water of conr densation when said trap is located below the water-line or below the boiler.

My object in using two valves, E' and I, is to procure the full boiler-pressure upon piston C' to the end of its stroke. As the piston engages inger N3 valve I gradually closes the foo IIO

steam-port 2,but valve E' is not moved to close is confined therein, since the branch'g is closed by the piston C, which comes into contact with the interior face of the cylinder-head,V

and this water serves on its release to condense the exhaust-steam which enters the cylinder.`

What I claim as new, and desire to secure` by Letters Patent, is

1. The combination, with the water-receiw.

ing cylinder Aand its piston C, of the auxil-4 iary cylinder D, `the piston therein connected 'f with the piston C, a chamber communicating with the cylinder A, a oat therein, and an equaliZing-valve connected with said float,

'which distributes steam to both cylinders, subiliary cylinder D, the pistony C', connected with piston C, a chamber communicating with the cylinder A, a oat therein, and an equalizngvalve connected with said float, which distributes steam to both pistons on their working stroke,and is operated by piston C' to distribute steam to the piston C on its return-stroke, substantially as shown and described.

3. The combination, with the water-receiving cylinder A and the cylinder D, ofthe connected pistons C C', the chamber G', communieating with cylinder A, the-hinged float G therein, the valve I, the arms L L L2, and li'nk M, connecting the same with the float, the finger N3, adapted to be engaged by piston C', arm N2, link M', and lever N N', for tripping the link M and moving the valve I von its seat, the yspring S, the piston J', and the valve E', connected thereto to distribute steam to the cylinder, substantially as set forth.

4. The combination, with the Water-receiving cylinder A and its piston C, of the auxiliary cylinder D and its piston C', connected with piston C, a chamber communicating with the cylinder A, a iloat therein, the Valve I,

operated by the float to admit steam to both cylinders. and by piston C' to admit steam to cylinder D, the steam-ports etica, t-he exhaustports e e', one of which, e', is in communication With the chamber, the eqnalizing-valve E, controlling said p'orts to bring the two exhaustports in communication while the cylinder is receiving, substantially as shown and described. y

5. The combination, with the water-receiving cylinder A'and the cylinder D, of the connected pistons C C', the chamber G', communicating with cylinder A, the hinged float G therein, the valve I, the arms L L' L2, and link M, connecting the same with the iioat, the finger N, adapted to be engaged by piston C', an" arm, N2, link M', and lever N N', for tripping the link M and moving theyalve I on its seat, the spring S, the piston J', the auxiliary valve E', connected thereto to distribute steam to the cylinder, and the connection .for leading the exhauststeam into the receiving-cylinder,substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses. p f

' 'JOSEPH H. BANKS. [L 8.]

Witnesses:

W. HAUFF, E. F. KASTENHUBER.

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