US680120A - Electric fan. - Google Patents

Description

No. 680,120. Patented Aug. 6, [90L E. W. BROWN.

ELECTRIC FAN.

(Application filed Nov. 8, 1900.)

(No Model.)

WITNESSES:

v INVENTOH B; i\ i Patented Aug. 6,1901.

E. W. BROWN.

ELECTRIC FAN.

(Application filed 310v. s, 1900. (No Model.) 2 Sheets-Sheet 2.

i E l E .5

/ v VENTOf? WITNESSES 5 a. BY m NITED STAT-Es PATENT since.

ELECTRIC FAN.

SPECIFICATION forming part of Letters Patent No. 680.120, dated August 6, 1901.

Application filed November 8 1900. Serial No. 35,807. (No model.)

To aZZ whom it may concern.-

Beit known that I, EDGAR W. Baowmacith zen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvementsin Electric Fans; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in electric fans, and comprises means combined with an electric motor (either an alternating or direct current motor) for distributing the currents of air generated by the fan-blades.

There are two kinds of electric fans in general use for keeping the air of a room in airculation. These are known in the art as ceiling-fans and buzz-fans. Comparing two motors of the above types taking the.

same amount of current and giving out the same power, one of them-to wit, the ceilingfan motor -will run at about an average of one hundred and sixty revolutions per minute, and the otherto wit, the buzz-fan m0- tor -will run at about an average of sixteen hundred revolutions per minute. In the highspeed motor the proportion of wire and iron used in its construction will be very small in comparison with that used in the low-speed motor. p 1 g It is the object of the present invention to adapta high-speed motor to the purposes of a ceiling-fan and to enable the use of fanblades of comparatively small dimensions.

Ceiling-fans of the ordinary type are suspended from the ceiling bya tube at a'height of about eight feet from the floor and have usually from two to four fan-blades, which are run at a comparatively low rate of one hundred and sixty revolutions per minute. The fan-blades usually have a sweep varying from forty-eight to seventy-two inches. In other words, this is the distance from the tip of one blade'to the tip of the opposite blade. The blades are set so that the air is drawn down from above'the fan and is forced directly toward the floor. The air then spreads out over drawn down by the revolving blades.

the floor until the walls are reached, when it ascends said walls to the ceiling and is again It will be seen that there is a column of air descending to the floor the diameter of which is equal to the spread of the blades. The following are the principal disadvantages known to exist in the ordinary ceiling-fan, as above described. 'For example, there are only places where a person can obtain the benefit of the breeze. One is a position directly under the fan, where the breeze will be thrown down on the head of the person, and the'other place is close to the wall, where the air ascends to the ceiling; The dirt-0f the street is carried in on the shoes of persons'entering stores, restaurants, and other public places where these fans are used, and where it falls off onto the floor and becomes dust. The ceiling fan whiclr throws the air to the floor stirs up this dust and difiuses it throughout the room greatly to the detriment of the health ofpersons who have to breathe such air. By the use of the air-deflector hereinafter described,

the air may be thrown downwardly and outwardly, according to the extent of curvature given the deflector. For example, the greater the curvature of the deflector the greater will be the spread of radiation of air generated by the fan-blades. In other words,by curving the deflector outward sufficiently the air is spread outwardly 'to such an extent as to avoid stri-k. ing the floor, but will be directed against the lower sides of the walls. Therefore persons in all parts of the room they receive the benefit of pure currents of air. Another objection met with in the use of the ordinary ceiling-fan is the liability of the large fan-blades becoming broken by being struck by objects carried through the room-such, for example, as a step-ladder. Striking the blades with such objects not only damages the blades, but often throws the fan out of balance and makes it liable to jump 0d the hook by which it is suspended. In the present invention the deflector is projected out beyond the ends of the fan-blades, and thus affords a protection to them. i

The means for obtaining the advantages hereinbefore described, as well as other new and useful features of the invention, will appear from a detailed description of the inven- 3 is a top plan view of the motor with the fanblades and reflector removed; Fig. 4, a crosssectional view of the motor with-the reflector broken away and one of the fan-blades re-- moved. Figs. 5 and 6 are detail views showing the manner of securing the curved arms to the motor and the manner of securing the deflector in position. 1

In the drawings '1 have shown a motor of the alternating-current-induction type, the

accompanying armature A of which is mounted on a hub 13 hub B'extends upwardly mam form of a and is-s urrounded by 'a field-magnet O. The i sleeve B and provides a supportfor the fanblades D. The said blades are attached .to'a spider'E, which has a threaded projection E that screws into the sleeve B of the hub B.

F designates the motor-shaft, which is 5 forced into the lower part of the sleeve B, and thus the said sleeveB and hub B become a support for the fan-bladesand the armature, the'armature Abeing snpportedon-the 1 shaft F through month."

ing G" of antifriction metal. This bushing forms'a bearing for the shaft F, which it surrounds.

. H designates a hardened screw, whic h penetrates an opening. in the center of the motor- I case and provides 'a seat for an antifrictionbearing, consisting of a single which the shaft F has its bearing.

,ball I, upon 1 for that purpose. This oil-reservoir being in a portion of the-casing is therefore stationary. Oil will find its way by the motor-shaftF to the bottom of thebearing, and will be confined within the hearing by a leaden washer P, which istightly pressed against the lower end G of the extension G by a screwH,-which, as before stated, provides a bearing for the ball.

The field-magnet Oisconstrncted of laminated iron and is attached to the motor-case G by means of bolts J.

K designates an air-deflector of sheet metal I or any other suitable material. A This defiec tor maybe shaped in-any desirable form, having in view the direction ordirections in which it is desired to deflect or distribute the air generated by the fan-blades. This deflector is concentric to the shaft of the motor and is placed in any desirable position with reference to the motor. shown it attached as follows, although there may be other ways of attaching the same:

L designates tubular arms which areconnected to the motor-case and hold the deflector in position by means of oblong plates a.

These plates are attached by screws a, which In the drawings I havev sconce penetrate the ends thereof and the deflector and screwinto the motor-case. Each of said plates has a screw-threaded projection b, by which said plates are screwed onto the arms L before said plates are attached to the motor. The other ends of the arms L screw into pending-tube N to the motor, the saidwires being thus brought out of the way of the fanblades inconnecting them to the motor. It has not been deemed necessary -to illustrate these connecting-wires in the drawings, as

4 they. are features wellknown.

.Itwill be readily seen that the deflector may beoonstructed in a number of'ornamental designs, and, further, owing to its forming a cover forthe motor much of the expensive and ornamental work usually expended on fan-motors may be dispensed with and the expense of construction of such mo tors materially lessened.

The present fan is not limited to ah'attacln 5 mentto the-ceiling. I It may be mounted on G designates a motor-case havingacentral tubular extensionG",which surrounds a bush-- a column extending from the floor or placed upon a suitable stand or base and used upon a; deskor table, thus taking the place'of a buzz-fan with the. following advantages: The

' air will radiate'from the fan to all sides of the table, thus giving persons the benefit of air in all directions, whil'ethe' buzzfan will throw the air in'; one direction only. Iclaim- Y 1. In an electric fan, the combination with an electric-motor, anda suspending-tube, of

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an air-deflector surrounding saidmotor, arms connecting the motor with the suspending-- tube, and common means forg'connecting the gravity down along tially as specified. I v

2. In an electrician, the combination with an electric motor, of an air-deflector-secured arms and the'deflectorto theiinotcr, substanthe depending rod, substantially as specified. '3. In an'electric fan, the combinationwith a motor and lfan-blades driven thereby, of a .stationaryair.-defiector inclosing said motor,-

the smaller part of saiddefleetor being closer tothe fanbla des than theilarger part there= of, the deflecting-surface of said deflector be Q ing curved inwardly so that the air deflected thereby from its original direction will he do flected less abruptly than if the said deflecting surface was straight, and whereby a greater volnme of air is directed from the deflector.-

4. In an electrician, the combination with an electric motor, of anair-defiector inclosing said motor and secured, thereto, a series of tubular arms-by means of which said deflector and motor are connected to a snspending tube,

the said tubular arm also providing means whereby the conducting wires passing through the suspending-tube are enabled to be connected with the-motor free from any interference with the fan blades, snbstam: tially as specified.

5. In an electric fan, the combination with a motor and a suspending-tube theref0r, ofa stationary air-deflector inclosing said motor,

, the shaftofsaid motor being projected through an openingin said deflector,fan-blades mountv .in presence. of two witnesses,

ed on said Shaft above said. deflector, whereby thefmotor, fan-blades, and deflector-are brought into a compact relation, substantially as shown. and; described. In't estimony whereof v Iaffixmy signature EDG R w. BROWN. Witnesses:

R. J. 'MCCARTY, J. A. WORTMAN.

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