US174509A - Improvement in injectors - Google Patents

Description

J. FERGUS.

"INJECTOR Patented March 7,1878.

Mmm @wm/f N. PETERS, PHDTOL|THOGRAPHER, WASHINGTONy D. C.

UNITED STATES 'PATENT OFFICE.

JAMES FEEGUS, 0E PHILADELPHIA, PENNSYLVANIA, AssIGNon 0E ONE- HALE HIS EIGHT To JAMES A. BROWN.; AND SAID FEnGUs AND Eno wN ASSIGNOES 0E PART oF THEIR EIGHT To GEORGE H. ooLKET, oF

SAME PLAGE.

IMPROVEMENT IN INJECTORS.

Specification forming part of Letters Patent No. l

74,509, dated March 7, 1876; application iled July 2, 1G75.

To alt whom t may concern:

Be it known that I, JAMES FERGUS, ot Philadelphia, Pennsylvania, have invented certain Improvements in Injectors, of which the .tol-

lowing is a specification:

Themain object of my invention is to so construct an injector that the operating parts can be readily removed from the body, for puroverflow-branch d, the said body A being enlarged in diameter where each of these branches communicate with it, so as to form a steamchamber, a', water-chamber, b", and overflowchamber, d. Throughout the entire length the body A has a central opening, into which is fitted the detachable tubeB, andjn the latter are formed the steam-nozzle e and the usual passages j' and f', openings g and h serving to establish colnmunicationV between the interior of the tube B and the water-branch b and overflow-branch d.

The admission of steam to the nozzle c is regulated by the position of the said nozzle in respect to the valve-spindle i', which projects from a tapering plug, D, adapted to a tapering seat in the end of the body A.

The spindle i is threaded throughout a portion of its length, and to this threaded portion is adapted a nut, j, secured to the end ot' the ,tube B, the nutbeing Slotted at its opposite sides, and adapted to ribs k formed on the opposite Sides of the casing of the Water-chamber c', so that, by turning the said Spindle i by means of its handle l, the tube B may be advanced or retracted and the steam-space enlarged or contracted at pleasure.

The plug D is confined to its seat by the uut m. The nozzle e and the opening g of the tubeB are so arranged in respect to each other that when the former is closed by the valvespindle i, the latter will be closed, or nearly closed, by the rear edge ot' the water-chamber b', so that the admission of both steam and water will be gradually increased as the tube B is moved forward, until both passages are fully open. f

The outer end of the tube B is reduced in diameter at E, 'as shown more clearly in Fi g. 2, and this reduced portion E is adapted to a correspondingly reduced portion of the openingin the body AI ot' the injector, on the edge ot' which portion is formed a valve-seat, n, adapted to a valve, o, formed on the body of the tube B around the edge of the opening IL, so that when the tube is moved forward to its full extent, the valve will bear on its seat, and

the opening hf and overflow-branch will be closed. i

The openings g and h are so arranged in respect to each other, however, that when the latter is closed the former will-be open, or partly open, and steam can pass-back around the nozzle e,'through the openings g and through the branch b into the feed-tank, thus serving to heat the water in the same, this being of especial advantage in injectors for locomotiveboilers, as it prevents the freezing ofthe water in the feed-tank.

I provide the check-valveFin the dischargepassage of the injector with a disk or valve, 19, and a ring, p', the two bei-ng connected together by arms q, which guide the valve perfectly, while the disk p and ring p oer a trm bearing for the valve at the ends, and eectually prevent its displacement, while, by dispensing with the usual guiding-bridge, the passage for the water is enlarged, and the back pressure ot' steam to close the valve has its full ei'ect.

The valve s of the overliow-branch, instead of having a stem embraced by a spring, as usual, has a socket formed in its lower p0rtion, in which tits the upper end of the operating-sprin g, tfthe lower end of which embraces a pin, u, on a bridge, fo, extending across the overflow-branch, so that, on the depression of the valve s, the spring t will be contained within the socketof the same, and will be protected from the injurious eii'ects of steam or hot Water passing through the tube.

It will be evident that by employing a detachable tubein which are combined the steamjet, water-passages, 85e., the work upon these parts can be much more easily andaccurately performed than it they formed part of the body itself', while the making of repairs or remedying ot' accidents can be et'ected with greater facilityand at less cost than attends the repairingfof ordinary injectors.

A prominent advantage resulting from the detachability of the tube B is this, that the body ofthe injector, when said tubeis removed, can be used as a feed-pipe for illin g the boiler, the area of the opening in the body being sut'- ficient for this purpose, thus dispensing with the separate arrangement ordinarily used.

In some instances in which it is desirable that the tube B, though removable, shall not reciprocate, said stem may be secured in proper position within the body, by means of aset` screw or other fastening, and a movable valvespindle may be employed.

I claim as my inventionl. The combination, with the body of an injector', of a removable tube, B, adapted to a longitudinal opening in said body, and provided with a steam-nozzle, and inlet and ontlet openings, the'whole being combined with a fixed or movable valve-stem, as herein set forth.

2. The combination of a body, A, and its chambers a', b', and d', and the fixed valvespindle t', with the movable tube B, its nozzle e, passages f f', and openings g and h, and with devices for operating the said tube.

3. The combination of the tapering plug D, and its projecting valve-stem i, partly threaded, as described, withfthe tube B and its nut j. the recessed edges of which are adapted to ribs k on the body of the injector, as described.

4. rlhe combination of thewater-chamber b and overflow-chamber d of the injector With the openings g and 71J in the tube B, said openings being arranged in respect to each other as and for the purpose herein set forth.

' 5. The combination of the valve o, opening h, and contracted portion E of the tube B with the contracted ,portion of the body A and its valve-seat n, and with the overflow-branch, all substantially as and for the purpose herein set forth.

In testimony whereof I 1have signed my name to this specification in the presence of two subscribing witnesses.

JAMES FERGUS. Witnesses:

E. H. ECKFELDT, HARRY SMITH.

Images