US1567401A - Fan - Google Patents

Description

Dec. 29, 1925.

H. R. STUART FAN Filed June 26I 1924 2 Sheets-Sheet 1 z w n c. 1 ad fm,

De.=29,1925. f 1,567,401

H. R. STUART FAN Filed June 26, 1924 2 Sheets-Sheet 2 @namur Patented Dec, 29, 1.925. p

UNITED STATES y 1,567,4oi PATENT OFFICE.

HARVE R. STUART, OF SPRINGFIELD. OHIO, ASSIGNOR TO THE ROBBINS & MYERS COMPANY, F SPRINGFIELD, OHIO, A CORPORATION OF OHIO.

FAN.

Application filed June 26, 1924. Serial No. 722,450.

Y 10 all whom t may concern Be it known that I, HAI-wn R. STUART, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and uscful Improvements in Fans, of which the following is a specification.

This invention relates to improvements in fans, it relating more particularly to means for adjusting the angle of the blades of the fan to direct the air currents in one direction or the other; the invention being more especially intended for fans of the type which are suspended from a ceiling for ventilation purposes.

In fans of the character referred to, it is desirable and usual to provide means for changing the angle of the fan blades so as to direct the air currents either upwardly or downwardly without the necessity of reversing the motor.

The object of my invention is to devise an arrangement whereby the blades mayI be quickly adjusted in a simple, accurate and uniform manner.

Referring to the drawings:

Fig. l is a vertical section of the rotor of an electric motor to which the fan blades are attached, the section being on the line 3 1-1 of Fig. 2.

Fig. 2 is a top plan view of the same.

Fig. 3 is a bottom plan view of the same showing a portion of two fan blades and their shanks connected in position.

Fig. it is an end view of the shank of one of the fan blades and its blade showing 'rn section the rot-or ring to which the shanks of the blades are attached.

Fig. 5 is an elevation of one of the blade shanks.

Referring to the drawings, l represents the hub of the rotor of an electric motor which is in the present case the armature. This hub is rotatably mounted upon a suitable support (not shown) and has radiating therefrom a series of downwardly and outwa-rdly curved arms 2 to form a spider-like structure. Integrally formed with four of these arms 2 are outwardly extending radial extensions 3, the outer ends of which are formed with integral heads 4 to which are attached the laminated structure 5 forming the coils of the armature.

Supported by the arms 2 is a blade carrying ring 6, this ring being preferably cast integrally with the outer ends of these arms;

and lying in concentric relation with the axis of the rotor. The lower side of this ring is formed with two sets of inclined faces 'i' and 8, the faces of one set heilig uniformly inclined at an acute angle in one direction to the plane of rotation of the ring and the faces of the other set being uniformly in clined at an acute angle in another direction to the plane of rotation of said ring, the angles of inclination, however, of both sets being of the same dimensions. The faces of one set alternate with the faces of the other set. In the structure shown in the draw ings eight of these inclined faces are em ployed, the faces 7 being preferably marked Up and the faces 8 Down Each in clined face is provided with a pair of openings 9 to receive bolts or other suitable fastening devices for the purpose of securing the blades in position. A portion l0 of two of the blades is shown in Fig. 3, each blade being connected with a curved shank 1l, the outer end of each shank being formed in the nature of a fiat plate 12 which is secured to the inner end of the fan blade and the inner end of the shank formed with a plate 153 provided with a pair of perforations 14 to receive screw-bolts l5 or other suitable fastening devices to secure it to one of the inclined faces.

If it is desired to direct the air currents downwardly the plates 13 of the blade Shanks are attached to the faces S. In the event it is desired to adjust the blades to direct the air currents upwardly the plates 'i3 are attached to the inclined surfaces 7. This furnishes a very simple means for quickly and accurately adjusting and changing the fan blades so as to directthe air currents either upwardly or downwardly.

Having thus described my invention, I claim:

1. In a. structure of the character described, a rotor, a series of spider-like arms projecting from said rotor, a ring supported by said arms in concentric relation with the axis of said rotor, the outer face of said ring being formed with a set of faces inclined in one direction with respect to the plane of rotation of said ring and with an other set of faces in alternating relation with the faces of said first set and inclined in another direction with respect to the axis of rotation, and a series of fan blades adapted to be detachably connected With either set of faces. n

2. In a structure of the character described, a rotor consisting` of a. hub, a series of spider like arms projecting from said hub, a ring supported by said arms in concentric relation with the axis of said hub, the outer face of said ring being formed;

With a set of faces inclined in one direction with respect to the planeof rotation of said ring and With another set of faces in alterhating relation with the faces of said first set and inclined in anotherdirection"With respect to the axis of said hub, a series'of fan blades adapted to be detachably connected With either set of faces, a series of radial supports projecting lbeyond, said ring, and armature coils carried by said supports.

"In testimony whereof, I have hereunto set my hand this 20th day of June 1924.

HARVE R. STUART,

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