US851041A - Injector. - Google Patents

Description

No. 851,041. I PATBNTED APR. 2a, 1907.

- w. T. STRAIN.

INJECTOR. I APBLIGATION FILED JUNEIB, 1906.

11311. I T '1 EF2 WITNESSES: INVENTOR THs NORRIS PITE'RS 00., WASHINGTON, D. x.

rmrrnn snares ATENT orrrcn.

WILLIAM T. STRAIN, OF MARION,

INDIANA, ASSIGNOR OF THREE-FOURTHS TO WILLIAM H. LOOKE, JOSEPH LOOKE, AND 'HENRY W. LOOKE, OF

MARION, INDIANA.

INJECTOR.

Specification of Letters Patent.

Patented April23, 1907.

Application filed June 15, 1906- Serial No. 821,844.

T0 air/Z7 whom it may concern:

Be it known that I, WILLIAM'T. STRAIN, a citizen of the United States, residing at Marion, in the county of Grant and State of'Indiana, have invented certain new and useful Improvements in Steam-Injectors, of which the following is a specification, reference being had therein to the accompanying drawmgs.

This invention relates to steam-injectors, and will be hereinafter more fully set forth.

The object of this invention is to construct a steam-injector in sucha manner that the same will operate automatically to regulate the supply of water thereto and to control the flow therethrough to the feed-pipe of the boiler. I attain this object by means of the j mechanism illustrated in the accompanying drawings, in which similar numerals of reference designate like parts throughout the sev-v eral views.

Figure 1 is an exterior view of my invention of an injector, and Fig. 2 is a'longitudinal sectional view of the same.

The outer casing or body 1 of this injector is preferably formed of one integral piece and has its ends open. The body 1 of the injector is provided with the feed or water supply pipe 2 and the overflow-pipe 3.

The steam-supply pipe 4. is removably secured to the steam-inlet end of the body of the injector by means of a coupling-nut 5, and the boiler feed-pipe 6, which is connected to the boiler to be fed, is also removably se cured to the discharging end of the casing or body 1 by a suitable coupling-nut 7.

The steam-nozzle 8 is turned at its enlarged portion to neatly fit the bore of the body 1, and thesaid nozzle is provided with the collar 9, which is adapted to fit into the collar-receiving recess 9, formed at the end of the bore of said body 1. The steam-nozzle 8 is securely held in position by the flange or collar end of the steam-pipe 4, which bears against the collar end of said nozzle. The bore of the nozzle 8 is tapered or gradually expands toward its discharging end, which end is provided with the contacting lugs 10, which. lugs are provided for the purpose of preventing the end of the movable mixing or suction nozzle 11 contacting with the outlet end of the steam-nozzle 8 to shut off the supply of water to the inlet end of the mixing nozzle 11, and thereby stop the operation of the injector. The lugs or stops 10 project a sufficient distance beyond the end of the steam-nozzle 8 to permit a sufficiently-reduced supply of feed-water to enter the mix ing-nozzle 11 to maintain the flow of the fluid through the injector.

The mixing-nozzle 11 is adapted to fit in and to slide longitudinally in the intermediate reduced bore of the casing 1, and the same is provided with a collar 12, which is adapted to bear or rest on the seat 13, formed integral with the casing or body 1 of the injector. This nozzle is also provided with a tapering or expanding bore, the smaller end of (pvhich bore is situated at its discharging en The receiving end of the combining-tube 15 is provided with a series of outlet or overflow holes 14., which extend radially of the said nozzle and are divided or spaced equally around the periphery thereof. The overflow-holes 14 are situated near the edge of the receiving end of saidnozzle or combiningtube for the purpose hereinafter described.

The combining and discharging tube 15 is provided with a bore which is contracted or reduced at its central portion and is gradually tapered or expands toward the ends of its borethat is to say, it is expanded gradually toward the inlet and outlet ends. The receiving end, or that end of the combining and discharging tube or nozzle 15 situated next to the mixing-nozzle 11, is provided with a collar 16, which is adapted to rest or bear against the end of the bearing-bushing 17 to limit the longitudinal movement of said tube or nozzle in one direction. The combining and discharging tube or nozzle 15 is adapted to slide longitudinally in said bearingbush ing 17 toward the discharging end of the nozzle 11 and to contact therewith. The discharging end of the combining and discharging tube 15 is provided with a closing-collar 18, which removably and adjustably secured on the end of said tube, as by a screw-thread or other suitable means. The collar 18 is adapted to move with the tube or nozzle 15 to contact with the end of the bushing 17 situated in the recess 19 for the purpose of preventing a leakage or backflow of the water from the boiler between the joint formed by the exterior cylindrical portion of the tube or nozzle 15 and its bearing-bushing 17. The collar 18 is so adjusted on its tube or nozzle 15 that it contacts with the end of said bushing situated in the recess 19 simultaneously with the contacting of the receiving end of said tube or nozzle 15 with the discharging end of the nozzle 11.

The operation of my invention is as follows: Steam is first admitted to the steamnozzle 8 by the pipe 1, and the water is permitted to enter the pipe 2, which is drawn to and enters the nozzle 11 by the vacuum pro duced by the flow of the steam from the steam-nozzle 8 to and into the nozzle 11, in which latter nozzle the steam and water are mixed and flow to, into, and through the combining and discharging tube or nozzle 15, from which tube the steam and water is forcibly discharged into the pipe 6 into the boiler.

It will be observed that with the above-described construction and arrangement of the steam-nozzle 8 and the mixing-nozzle 11 the flow of water to and through said mixingnozzle 11 is automatically regulated to secure an unbroken and regular flow of water to and through the combining and discharging tube or nozzle 15. It will also be noted that should the ilow of water from the mixing-nozzle 11 be, by any cause whatever, caused to stop or break or be retarded or diminished in volume to such an extent as to cause the injector to work unsatisfactorily for a short instant of time the combiningand discharging tube 15, owing to the back pressure from the boiler, will move toward the nozzle 11 to reduce the space between the ends of the nozzles 11 and 15, and thereby restore the operation of the injector. It will be also noted that when too much water is fed to the inlet end of the nozzle 11 the said nozzle 11 will approach the end of the steamon said nozzle, a feed-water inlet, and a lifting and mixing nozzle, having a longitudinal movement toward said steamnozzle, of an overflow situated adjacent the discharging end of said mixing-nozzle and a combining and discharging nozzle.

2. In an injector for steam-boilers, the combination with a steam-nozzle, end stops on said nozzle, a feed-water inlet, and a lifting and mixing nozzle having a longitudinal movement toward said steam-nozzle and an overflow situated adjacent to the discharging end of said lifting and mixing nozzle, of a combining and discharging nozzle situated on line with and having a longitudinal motion toward and to said lifting and mixing nozzle, said combining and discharging nozzle having a series of peripheral overflowholes situated adjacent to the receiving end of said nozzle and means for limiting the longitudinal movement of said combining and discharging nozzle.

3. In an injector for steam-boilers, the combination with a steam-nozzle, and stops on said nozzle, a feed-water inlet and a lifting and mixing nozzle having a longitudinal movement toward said steam-nozzle, of an overflow situated adjacent to the discharging end of said lifting and mixing nozzle, a combining and discharging nozzle situated on line with and having a longitudinal motion toward and to said lifting and mixing nozzle, said combining and discharging n0zzle having a series of peripheral overflowholes situated adjacent to the receiving end of said nozzle, means for limiting the motion of said combining and discharging nozzle, and a closing-collar adjustably mounted on the discharging end of said combining and discharging nozzle.

In testimony whereof I affix my signature in presence of two Witnesses.

WILLIAM T. STRAIN.

Witnesses JosEPH H. LooKE, WILLIAM A. LooKE.

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