US282074A - Paul h - Google Patents

Description

(Model.)

P.-H. GR-nvuvx.

INJBCTOR BLOWER.

Patented rJuly 31, 1883.

fave@ UNITED STATES PATENT EEIOE.

PAUL H. GRIMM,

OE GLEN OOvE, NEW YORK, AssiGNoR OE ONE-HALE 'ro JOHN DURYEA, OE SAME PLACE.

lNJECTOR-BLOWER.

sPEcrEIcA'rIoN forming para of Letters Patent No. 282,074, dated July e1, 1883.

Application filed May 3.1883. (Model.)

T0 all whom it may concer/z Be it known that I, PAUL H. GRIMM, a citizen of the United States, residing at Glen Cove, in the county of Queens and State of New York, have invented certain new and useful Improvements in Inj ector-Blowers, of which the following is a specification reference being had therein to the accompanying drawings.

My invention relates to the construction of an inj ector-blower or exhaust wherein a column of air or gas is propelled or projected by the pressure of j ets of steam or compressed air 5 and its object is to force or project a current of air in a given direction with as little expenditure of steam-power and with as little admiXture of steam with the air or gas as practicable.

The novel features of my invention will be hereinafter described and claimed.

In the drawings, Figure lis a side elevation of my device. Fig. 2 is a sectional elevation, and Fig. 3 is a detail. A

A represents the casing of my air-injector. This casingis preferably cast in one piece for convenience of construction. The casing has a bell-mouthed air-inlet, a, a bell-mouthed outlet-passage, b, and a combining-chamber, c, between the narrowed portions d d of the casing.

Surrounding the casing, at about the middle in the construction shown, there is an annular chamber, e. The steam in the annular chamber e should be as nearly at boiler-pressure as possiA ble. This may be maintained by leaving` the pipe Z, which connects to the boiler, quite unobstructed, and by making said pipe of sufficient size.

A series of nozzles or jet-pipes, f, are placed in thebottom of chamber e. These pipes or nozzles incline toward the center of the combiningchamber c, as shown in Fig. 2, and any suitable number may be employed. They should be arranged at equal distances, so as to entirely surround the combining-chamber c. I have found six of these jet-nozzles to serve a good purpose, but do not limit myself to that number. Each nozzle is provided with a valve, t, which may be raised'and lowered by means of screw-shaft g, which works steam-tight in stuffing-box k. This box may screw into the upper part of the steam-chamber e, as at Z Z, Fig. 2. Other suit able and convenient modes of operating the 5o valves with relation to the nozzles may be used. The valves z' are conical, and can be screwed down steam-tight into the conical valve-seats of the nozzles j'. .Y

My improved inj ector-blower is adapted for 5 5.

any of the uses for which the fan-blower has been designe( .-a '5, for instance, the conveyance of an air-blast to a furnace, the exhaust of gas' from mines, theventilation of buildings or ships, the propulsion of grain, feed, shavings, &c., in 6o a chute or conveyor, and for other purposes.

' The mode of Operation is as follows: The blower is placed with the bell-mouth b in proximity to the furnace or other place into which it is desired to introducea current of air. Steam 65 being admitted to chamber e, preferably athigh pressure, the valves are Opened and steam rushes through the nozzles f toward the center ofthe combiningchamber c. This inrush of steam causes a rapid inflow of air through the 7o bell-mouthed passage a and into the chamber c, where air and steam are intinmtely mixed. The compression of the mixed air and steam as it passes through the narrowedthroat d causes it to fiow outward through the bell-mou th b with 7 5 increased velocity. By means of the valves i, operated by valve-rods g, as shown, the nozzlesf may be opened more or less to regulate the iiow of steam through said nozzles. The valves on one side may be opened more than 8O those on the other to give the blast a deinite direction, or the alternate valves may be opened different distances, so that steam may flow freely through one set ofp Orts andbe wire-drawn7 through another set, thus producing an inti- S5 mate commingling of the steam and air by reason of cross-currents and different velocities. The enlarged area of the combining-chamber gives space for the admixture of the steam from the jets with the inrushing air-currents, 9o while theinclination of the jet-pipes toward the center of this chamber gives such direction to the impinging currents as will cause them to move rapidly vthrough the outiioworice.

It is apparent that the device may be Oper- '9 5 ated by the introduction of compressed air into the chamber e instead of steam, so that the de vice would become entirely an air-injector.

@geen The peculiar form 'ol' the bell-mouthed outiioW-pipes, with the intermediate combiningchamber of greater sectional area than the outiioW-tube, gives great advantage toV this form of injector-blower, the friction of passing currents on the tube being slight.

That I claim isl. An air-injector consisting, essentially, of an iniioW-pipe, a bell-mouthed outflow-pipe, an enlarged intervening combining-chamber, j et-nozzles leading into the combiningchamber, and independent means for closing each of said nozzles, substantially as described.

2. The combination, with the ini-low and outioW pipes, the intermediate combiningchamber, and the annular steam-chamber, of a series of steam-j et nozzles, as f, arranged at approXimately equal distances ap art in the steamchamber, and inclined toward the center of the combmingchamber, substantiallyT as shown.

3. The combination, with the injector-pipe having bell-mouthed ends, as a b, and intermediate combining-chamber, of the annular steam `chamber and the steam-nozzles, as j', leading from the stea1neh amber to the combiningchambcr, each nozzle having an adjustable valve, all constructed and arranged substantially as stated.

4.' The air-injector casing, constructed substantially as described, having bell-mouthed ends and enlarged central combining-chamber, the annular steam-chamber surrounding said casing and integral therewith, the series of inclined j et-nozzles leading from th e'steam-chainber, and the series of valves, one for each nozzle, having screw-threaded .stems which pass through the steam-chamber, and may be oper ated from the outside to open or close the jetnozzles, all in combination, substantially as stated. Y

5. The method of producing air-currents, which consists in drawing a column of air into a tube by means of controllable separate steamjets forced into said tube in an inclined direction, permit-ting the steam and air to expand and mix in a chamber of enlarged area, and then forcing out the mixed current through a reduced aperture, substantially as described.

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

PAUL H. GRIMM.

Witnesses HENRY Davis, ALFRED Sarrrn.

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