US488099A - John trix - Google Patents

Description

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JOHN TRIX, OF DETROIT, MICHIGAN, ASSIGNOR TO THE AMERICAN INJECTORv COMPANY, OF SAME PLACE.

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SPECIFICATION forming part of Letters Patent No. 488,099, dated December 13, 1892. Application led April 22, 1892. I Serial No. 430,220. (Model.)

To a/ZZ whom t may concern,.-

Be it known that I, JOHN TRIX, of Detroit, in the county ot' Wayne and State of Michigan, have invented a new and useful Improvement in Injectors, of which the following is a specification.

- This invention relates to improvements in the well-known Gilfard injector for charging boilers with water by the action of a current ofsteam; and it consists in the introduction ofV a double-seated valve to control both the upper or suction-pipe overflow and the lower or combining and delivery overflow, which while the outflow from the upper overflow is closed by the suction of the liftingjet shall yet be sufficiently open to permit the escape of water through the second overfiow when the current is unformed or has been broken.

VIn the annexed drawing the entire injector is shown in a single vertical section.

A is the shell, cast in one piece with diahragms A', A2, and A2 to form internal cham' P s bers and sustain the jet-tubes com mon in this class of machines-viz., B, the steam-inlet tube; C, the suction-tube; D, the combiningtube, and E the delivery-tube. Overowopenings arevmade in tube D, one at Dabove diaphragm A2 and the other at D2 below the said diaphragm. As these parts are familiar to all skilled in the art, they need no further description.

The chamber F, formed by the diaphragms A A2 and the shell, incloses the overflowspace between the suction-tube C and the combining-tube D. The chamber G is formed by the shell and the diaphragms A', A2, and A3. The chamber H is formed by the walls of the shell, which are so arranged that the water or stream from both the upper and lower overflows shall discharge into the one delivery-chamber H. A valve I, formed as shown, has two seating-surfaces, one on the barrel or body of the valve and the other on the under side of the ange I2, which is underhung on the periphery and seated at K on a ilange on the part of the wall which forms the exterior of the discharge leading from chamber G to the discharge-chamber H. The barrel or body of the valve is turned to fit the inished interior surface of the tubular discharge formed by diaphragm A2 and leading from the suction-chamber E to the dischargechamber H, which surface forms the valveseat K.

The lower 'end of the valve I below the barrel-formed portion is formed with wings 12,' which afford a bearing on the seat K when the solid portion of the valve islifted beyond lthe mouth of the discharge-opening of chamber F. The valve is guided and kept in position by a stem I', which, as shown, is pistonheaded and moves in a chamber in the cap L. fAny other guide will answer the same purpose. j

The operation of the injector is as follows: xIn starting, the steam is turned on through tube B and driven into the suction-tube C, entraining the air in the inclosing chamberl B,into 'which the water-pipe is arranged to discharge until a suflieient vacuum is created in said chamber to cause the water to flow into the chamber and through the space between the steam and suction tube. The steam when it passes out of the tube C cannot at first force its way through the tubes Dand-E f and escapes at the upper overliow into chamber E. It is very soon followed by the stream of water, and', pressing upon the under side of valve I, forces i-t upward until the barrel portion of the valve is raised Ventirely above the seat K', the valve being held in place by the wings I2, the water or steam passing out through the delivery-chamber H. Vhen the water is supplied to the combining-tubeD, it drives the air before it, and at first escapes through the lower overiiow into chamber G, and thence through the annular discharge into chamber H. When the air has been entirely driven out and a current is established, the current passing from tube C to tube D entrains the air in chamberF and establishes a vacuum or'minus pressure therein, and the external atmospheric pressure upon the upper surface of valve I drives it down, so that the barrel or body of the valve enters seat K', cutting off communication between the chambers H and F. The water still escaping at the lower overfiow into chamber G passes through the annular discharge leading into chamber H. As soon as the current is established IOO through the delivery-tube E a condition of minus pressure is established in chamber G,

and the external pressure on valve I drives the iange I2 down upon the seat K and the machine is in full operation. Should a break occur in the water-jet, the water will instantly begin to flow out of the lower overflow and lift the flange I2 of the valve from its seat K sufciently to allow the water to liow out until the current is re-established, when the valve will close again and the proper operation of the injector be repeated, its operation being entirely automatic after steam is turned on.

Ihave shown the valve made in one piece and also made integral with its stem. It is obvious, however, that the valve can be made to slide on its stem,which in that case would be stationary; also, that the valve may be made in sections so combined as to act in the same manner, one section governing the eduction from chamber F and the other that from chamber G, precisely in the same manner as herein accomplished by a valve made in one piece. Therefore in speaking of the valve las a single piece I do not limit myself to a valve so f0rmed,but include any valve, whether single or sectional, which operates to close the outlet from the upper overflow-chamber or keep it closed While the outlet from the lower overflow-chamber is open, and also to close them both when the injector is in full operation.

The feature which distinguishes my invention from those injectors which employ independent 'openings out of the overfiow-cham bers, each controlled by an independent automatic valve, is the use of two overtlowcham bers connected by contiguous outlets with a single disch arge-chamber, and a dou ble-seated solid or sectional valve acting automatically on the contiguous outletsl to close one or both independently or successively in establishing or re-establishing the current.

With this injector I can inject hotter water than with one which has independent valves placed on the discharge from both the upper and lower overfiows. As the water injected rises in temperature the tendency to break increases, the current at the lower overflow lifting the valve and permitting the water to escape. In my injector the seat-face of the valve which acts on the lower overow is held on its seat by an additional pressure, due to the condition of minus pressure established in chamber F, and consequently it will remain closed and hold the current unbroken with a feed-water temperature which would break the current when independent valves are employed on the two overflows.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a steam lifting and forcing injector, the combination, with the upper and lower overflow-chambers provided with contiguous escape-openings, of a single discharge-chamber and an intermediate double-seated valve, the elements of which act on the respective gpenings successively, substantially as set orth. i

2. In combination with the casing of a lifting and forcing injector, which together with the internal diaphragms form overflow-chambers F and G, the outlet-orifices of which are concentric, the chamber H, and the intermediate valve I, and seats K and K', formed around said orifices on which the elements of the valve are seated successively, substantially as set forth.

3. In ,a lifting and forcing injector, concentric escape-openings provided with valveseats, and a valve made up of cylindrlcal and flat faces, also concentric, the outer acting only after the inner has been closed,substan tially as set forth. Y

4. In an injector, a valve with two seatfaces, in combination with the outlet-openings from the chambersF and Gr, the arrangement being such that the valve is pressed upon the opening from G with a pressure increased by that of the external atmosphere produced by a condition of minus pressure created in F, substantially as set forth.

In witness whereof I have hereunto subscribed my name in the presence of two attesting witnesses.

JOHN TRIX.

Witnesses:

R. MASON, M. A. HOWEY.

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