US191773A - Improvement in injectors - Google Patents

Description

WILLIAM n. NEWELL, or PHILADELPHIA, rnnnsrrlvAnm.,

.IMPROVEMIENT'IN llNJrsc'ToRs.

Specication. forming part of Letters Patent No.A 1.91.3773, dated J une 12, 1877 application .filed y .I November 3,1876.

To all whom it mag/.concern Be it known that1I,' w1LL1AM H.l NE'WELL, of the' city and county of Philadelphia, and

State of Pennsylvania, have invented anew Figure 1 is a side elevationfof the injectorl Fig. 2 is acentral lembodying my invention. j j vlongitudinal vertical section thereof. Fig. 3' is 'an end view thereof. Fig. 4@ is va central section of the overflow. Fig. 5 is la transverse section in line a: av, Fig. 1. Fig. 6i is a longitudinal section of a. modification of the mov.- able steam-spindle;

Similar letters of reference indicate 'corresponding parts in the several figures.

, My invention consistsv of a spindle,4 which V is adapted to open the steam'and lvvatervalves forallowing water of condensation to' pass from the boiler, and then admitting-steam and i water, whereby the water may be injected into the boiler. It also consists of the overiiow valve, formed of a plug, Whose head is perforated and encircled by a sleeve, which automaticallycovers and uncovers the perforations of the head, so as to permit the escape of the overflow water, and when the injector isworking to close the valve and prevent the indraft of air. It also consists of strainers in the steam and water pipes for preventing the admission of obstacles to the injector, and also serving as guides for the stems of the valves.

Referring to the drawings, A represents a shell or tubular structure, with the bore of which communicate the steam-connection B, water-connection O, and overflow-chamber D. Vlithin the bore of the shell there is fitted a hollow spindle, E, one end of which projects outside of the shell, and has connected to it a lever, F, which is pivoted to a yoke, G, for imparting sliding motions to the spindle, and said yoke is fitted to the shell A, so as-to be capable of rotation, whereby rotary motions may be imparted to the lever F and the spinconnection B, whereby ,.by meansofl saidopen ings and the pore' f' the spinne, the steam? f connection B communicates with the vvboreof,4

theshell'.

fIn the steam-connection therefs fittedwa valve, H, whoseclosing. motion isJ `f'elfected .by properly ,arrangedgoii .its stem f and inthe connection C thereg-is ittedawalve, J, whose closingmotion is effected by a spring, d, properlyjarrangedon itsl St.em', tllelseats of. said valves being shoulders' or projections on the inner faces ofthe respectiveconnections'-. lIn order toA properly guidethe lv'a'lvesfin their motions lateral projectionsevare made in. the shell A, and they extend partly. across the, l mouths of 4 the' steamand water.connections, the` stems passing through said projections, and coming inv4 'contact with the spindleE. Portions ofthe, .spindle tare cutv, awa`y,at thegy. placesl of contact with .the,spindlesso as t o leave -at said places v .calli-faces..if f, wl1'ereby` by rotation or `forcing in of the spindlelnotion -i may be communicated to the valves H, J ,one of said faces, being-`shownx in cross-section, Fig. 5, and both faces, in the longitudinal seca spring, b

tion, Figs. 2 and 6. The spindles of the valves are also passed through perforated disks g, which are securedawithin the respective connections B O, and they guide the valve-stems, and also act, as strainers to prevent the passage of sticks, leaves, &c., to the injector, andconsequently to therboiler.

In the overllow-chamber D there is secured a plug, K, which is of tubular form, and has a conical head, in which is av number of openviug's,'h. Surrounding the head is a conicalshaped sleeve, L, which, when in its normal position covers'the perforations of the head of the plug, the diameter of the head and sleeve being smaller than that of the overdow-chamber D, the plug closing the cham- .ber, so that access from or 'to the bore ol'` the shell -will be had only througlLthe bore lof the plug K and the perforations h. M represents the check-valve, which is located inthe detachable branch or connection Ml, leading to the boiler, andit may be of any desired conn struction..

Theend of the spindle E, opposite to the perforations a, is of conical shape or pointed, and the adjacent surrounding portion of the bore of the shell is of larger diameter than that of the conical end, so as to leave a space between said end and the shell, with which space the water-connection B communicates, the portion k of the bore of the shell, between the conical end of the spindle and the overflow chamber, constituting the combiningtube of the injector.

The operation is as follows: The parts being in position shown in Fig. 1 the spindle E will be partly rotated or moved, in by means of the lever F, so that the cam-face f will open the valve H of the steam-connection ,B. The water of condensation from the boiler will Vthen ilow through the openings a and the bore of the spindle to the overflow-chamber, and thus pass out. Thenv return the spindle to its first position, thus closing the valve H, and rotate the lever in the opposite direction, or again move it in, .whereby the cam-faces f j7 will open the two valves H J at. the proper moment. Water and steam will now enter the combining-tube of the shell,l and reach the overilow'chamber, from whence they pass to the .plug K, and, entering the openings h, they lift the sleeve L, thus uncovering the openings h, whereby the water and steam will pass out. When, however, the combined pressure of steam and water is suiicient to open the check-valve M, thel latter Awill be opened, and the water, passing the overflowchamber wthout entering the saule, is injected into the boiler, the feeding being thereby occasioned. When the injector is in operation the sleeve L closes on the perforated head of theplug K, and thus prevents an -indraft of air yto the injector, and consequently to the boiler. v

By withdrawing the spindle, or by a rotation of the same so that the deepest portion conical end of the latter adj usted to the mouth of the combining-tube relatively to the press-v ure of the steam, ow of water, or other existing circumstances.

'By placing the check-valve at the outside end of the branch or connection M leading to the boiler, or removing it as far as possible from the injector, the valve will immediately close when the injector is working, and the injector may be displaced without removing the check-valve, as thelatter remains with the branch or connection attached to the boiler..

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

- 1. In au injector a steam-spindle, with valveoperating cam-faces, substantially as and for the purpose set forth.

2.. rlhe rotary yoke G, with lever F, in combination with the spindle E, and valves H J substantially as and for the purpose set forth.

3. The overflow-chamber D with the plug K and its encircling sleeve L, substantially as and for the purpose set forth. v

4. The connections, provided with strainers g, in combination with the stems of the valves H J passed through .said strainers, substantially as and for thegpurpose set forth.

l WM. H. NEWELL.

Witnesses:

JOHN A. WIEDERsnEm, JNO. A. BELL. Y

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