US411826A - Power-fan - Google Patents

Description

3 Sheets-Sheet 1.

(NQ Model.)

www FAN.

Patented Oct. 1, 1889.

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P. MURRAY, J1.

POWER PAN. No. 411,826. Patented Oct. l, 1889.

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(No Model.) 3 Sheets-Sheet 3. P. MURRAY, Jr, POWER FAN No. 411,826. vPan'tenized Oct, 1. 1889.

UNITED STATES lPATENT OFFICE.

PETER MURRAY, J R., UF NEVARK, NEV JERSEY.

POWER-FAN.

SPECIFICATION forming part of Letters Patent No. 411,826, dated October 1, 1889.

Application filed November 30, 1887. Serial No. 256,493. (No model.)

To all whom it may concern.:

Y Be it known that I, PETER MURRAY, J r., a citizen of the United States, residing at Newark, vcounty of Essex, and State of New .I er- -sey, have invented cert-ain new and useful Improvements in Power-Fans, fully described and represented in the following speoication and the accompanying drawings, forming a part of the saine.

This invention relates, generally, to that class of power-fans which are used for cooling and Ventilating purposes.

The invention relates, particularly, to iniprovements in the means for supporting the fan and for putting it into and out of operation. `There these fans are employed, and particularly where a number of the fans are required, it is frequently desirable to stop or start one or more of the fans without stopping or starting the others. It is therefore desirable that each fan should be provided with means by which its movements can be controlled independently of the others.

One feature of the invention relates particularly to a means for effecting this re- Suit.

Other features relate to means for supporting the fan and tothe construction of the fanblades, by which ahetter circulation of air is produced.

In the accompanying drawings, Figure l is a sectional elevation of a fan and its hanger embodying the improvements constituting the present invention. Fig. 2 is a horizontal section taken on the line 2 of Fig. l. Fig. 3 is a similar view taken on the line 3 of the same iigure. Figs. 4, 5, and GV illustrate details which will he hereinafter explained. Figs. 7, S, and 9 illustrate the construction of the fan-blades. Fig. 10 is an enlarged section of the means for putting the fan into and out of operation. Figs. ll and l2 are crosssections taken, respectively, on the lines 1l and 12 of Fig. 10; and Fig. 13 is aview similar to Fig. lO, showing the parts ina different position.

Referring to said figures, it is to he understood that the fan consists of two or more horizontally-arranged blades A, which project radially from a hub B, having sockets b, in which the blades are secured ohliquely to the hul) and its shaft and in such manner that they can readily be adjusted to differentV angles of inclination. The hul) B is mounted to turn freely upon the lower end of a vertical shaft C, which is supported in a suitable frame or hanger D, depending from the ceiling of the room. The shaft C is provided at its upper end with a grooved or other pulley h, around which the belt for driving the fan passes. Thehanger D is composed of three or more arms 5, which are arranged with relation to each other as best shown in Fig. 3. The arms composing the hanger are cast in two pieces, two of the arms being' cast in one piece and the third sepa rately. i The two arms which are cast together are connected by ring portions k, which form hearings for the shaft C, and are formed to receive Babbitt or other metal l to form boxes for the shaft. The ring portions 7c are provided at the proper point with recesses m, into which iit projections n, formed upon the third arm, the projections n being of recessed or dovetailed form, as shown in Figs. 5 and 6, so that when the metal Z is poured intothe ring portions 7.; it will serve to lock the third arm to `the other two, and thus make the three a rigid structure.

In placing the hangers thus constructed in position it is of course necessary that they should he so secured to the ceiling that the shaft C will he vertical, as otherwisethe fan would not run easily and evenly. This is in many cases a work of considerable difficulty, as it frequently happens that the ceiling upon which the hanger is to he secured is not perfectly smooth and level, and as a consequence the hanger, if secured directly against the ceiling, would not hang in such position as tov make the shaft plumb. To obviate this difiiculty I provide the upper ends of the arms c' with projecting studs, upon which are fitted washers o, which are made of greater thickness at one edge than at the other, as shown in Fig. l. Then the ceiling to which the hanger is to he secured is perfectly level, the washers of all the arms will be adjusted, so that the thickest port-ion of one washer will overlie the thinnestportion of the other, and when in this position the several arms will be of the saine length. By adjusting the two washers to diife-rentpositions with relation to each other the length of one or more IOO of the arms i can be increased, as will readily be seen, so as to compensate for inequalities or any slight inclination in the ceiling, and thus cause the hanger and its shaft() to hang plumb or vertical.

The hub B, as before stated, is arranged to turn freely upon the shaft C, so that the shaft can be continuously turned without necessarilyimparting motion to the hub and the fan-blades. The lower end of the shaft C is provided with an enlargement or .head c, b etween which and the lower end of the hub there is interposed a loose collar' a. The upper end of the collar a is made flat, so as toaiford asmooth bearing for the lower end of the hub, and the lower edge of the collar and the-upperfedge off-the headc are provided ywith coacting .inclines d, which are so arranged that by turning the collar about the shaft the hubwill be raised and lowered upon the shaft.' The lower end of the hub is provided with, a recess c, which is arranged to receive Va pin f, projecting from the shaft C, and the.upper edge of collar dis provided with an annular recess g, also arranged to receive` thepin f when'the collar is raised.

Thel operation of the device thus organized is .as follows zy The belt being upon thepulley upon the shaft C, so `as to set the shaft in motion in kthe direction indicated by the .arrow, it is only necessary in order to stop the fan to. grasp and hold the collar a. As soon as this is done the l:movement of the shaft will cause the inclines d upon the collar to ride up the corresponding inclines upon the head c, and thus raise the hub above the pin The yresistance of the air offered to the blades of the fan will then stop the fan and the hub, while the shaft C will continue to revolve, carrying the pin f idly around in the annular recess g. The bottoms of the inclines` d upon the collar d will preferably be provided with small projections 2,which, when the hub is raised, will enter corresponding re cesses 3, formed in the tops of the inclines d upon the head c, and thus catch the collar and prevent it from being held so long as to carry the inclines d of. the collar-entirely over the in clines of the head. To start the fan, the collar a is grasped and held with sufficient force to carry the projections 2 out of the re -cesses 3 and the inclines d of the collar a. past the inclines of the head c. -As soon as this takes place the collar a will drop, leaving the hub supported upon the pin f, so that as soon as the pin is brought beneath the recess e by the revolution of the shaft C the hub -will drop, so as to allow the pin to enter the recess, and thus clutch the hub to the shaft and start the fan.

Another feature of the present invention relates to a peculiarconstruction of the fanblades by which the areain which the air will be agitated will be increased. For this purpose the blades, in additionv to being set so as'to throw the air downward, as shown this curvature, it is also desirable, in order y to secure still more lateral agitationof the air, toprovide the blades with air-passages fr, which Vopen outward at the ends of 'the blades and communicate with openings p,

which openthrough kthe sides of the ,blades vwhich act upon the air when the fanis ill,

motion ata point near the hub. Y Asthe blades are revolved thelair will beI causedv to pass through the openingsv p `and intothe passages r, andwill by centrifugal forcebe projected outwardA from theendsof, the blades, thus creating lateral currents which will effect the agitation of the air toa considerable distance. This feature is als() equally applicable in those caseswhere the blades are of. the straight or .ordinary form instead of being curved or deflected at their.

ends. n I i The air passages r maybe readily pro duced by providing the ordinaryflat blades with backing `portions s, which are suitably IOO said passages and opening through the sides of the blades which act upon the airwhen the fan is in motion, `substantially as described.4 g

2. In a power-fan, the combination, with the main shaft C, of the radial blades A, set obliquely to theshaft, so as to throw the air in the directionof. the length of the shaftand also bent in the direction of their length Lto throw the air laterally, and provided with air-passages fr,'opening outward at the, ,ends of the blades, and with openings 1J, communicating` with said passages and opening through the sides of the blades which actu'pon the air when the fan is in motionfsub# stantially as described.

3. In a fan-hanger, the combination, with the arms e', having studs at their endsJ of the washers o, tting loosely on said studs and made thicker at oneside than at lthe other, substantially as described.

et. The combination, with the rotating shaft C and the hub B, turning freely on the shaft, Vsaid shaft and hub having the locking-pin f and recess e, of .the head c, secured to the IIO ISO

1a1'a,inte1fposed between the head e and hub myhaud in the presence of two subscribing B, andhewing Jthe incline d, said inclines be- Witnesses.

in" provided with the projection 2 and recess i, r

3,?01: engaging with each other to arrest the PE1 ER MURRAX JR' 5 collar temporarily in its raised position, Sub- Vtnesses:

stantially as described. J. J. KENNEDY,

In testimony whereof I have hereunto set G. M. BORST.

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