US1011259A - Fan. - Google Patents

Description

G. W. SMITH & J. GARY.

FAN.

APPLICATION FILED JUNE 15, 1910.

Patented Dec. 12, 1911.

lnventors Witnesses Attorneys GEORGE W. SMITH AND JOHN GARY, 0F CONEMAUGH, PENNSYLVANIA.

FAN.

Specification of Letters Patent.

' Patented Dec. 12, 1911.

Application filed June 15, 1910. Serial No. 567,078.

To all/whom it may concern:

Be it lmown' that we, GEORGE W. SMITH and JOHN GARY, citizens of the United States, residing at Conemaugh, in the county of Cambria, State of Pennsylvania, have invented a new and useful Fan, of which the following is a specification.

The fan which is the subject of the present invention is designed more particularly for use in saw mills for removing dust, shavings, etc.; and it is the object of the invention to provide a fan of this kind which will not clog or choke up, nor become unbalanced. I

With this object in view, the invention consists in a novel construction and arrangement of blades to be hereinafter described and'claimed, reference being bad to the accompanying drawing forming a part of this specification, in which drawing;

Figure 1 is a front elevation of the fan. Figs. 2 and 3 are sections on the lines 22 and 3-3, respectively, of Fig. 1.

In the drawing, 5 denotes a circular disk suitably mounted on a shaft of the fan so as to rotate therewith, and serving as a sup port for the blades. The drawing omits the casing and shaft and shows the disk equipped with five blades, but their number is immaterial, and may be varied at will to suit the size of the fan, or the particular conditions under which it is to be used.

Each blade of the fan is made from a segmental blank the straight edges 6 and 7 of which are arranged at right angles to each other. The edge portion 6 of each blank is secured to one face of the disk 5 by means of rivets 9 or the like, the blade bemg curved rearwardly and laterally awayfrom the edge 6 and thence forwardly in the direction of rotation of the disk and blades, thus giving a curved contour to the edge 7 and making the curved edge 8 of the blank the advancing edge of the bucket formed by the curved blade. This curved advancing ed e 8 of the blade is extended in'advance o the edge 6 and said curved edge 8 gradually recedes rearwardly and inwardly from the outer portion of the bucket and then forwardly, in the direction of rotation of the bucket, to the fixed straight edge 6. It will be noted that the blades are all spaced apart at their inner ends and, by curving the advancing edges 8 in the manner set forth, the spaces between the inner or feed ends of the blades are con siderably increased. It will be noted thatthe buckets are arranged radially upon the== disks and are projected slightlybeyond the periphery thereof although this last anrangement is not deemed necessary.

The fan is adapted to rotate within a suitable casing not shown, the direction of rotation being indicated by the arrow in Fig. 1. Sawdust or other material to be acted on by the fan is sucked into the fan casing and into the space between the inner ends of the blades or buckets. The material is then thrown outwardly beyond the periphery of the disks by centrifugal force and is discharged tangentially from the cas ing in which the fan is located. Should rags, ropes or the like be inadvertently fed to the fan, the advancing inner portions of the curved edges 8 will first engage them and, by reason of the contour of these edges,

they will ride over or along the said materials and gradually direct them into the feed ends of the buckets without danger of them becoming hung upon the blades because there are no angle portions presented to the material and which are likely to be engaged thereby. As a result, clogging of the fan and its casing is prevented and any material fed into the casing and to the space between the inner ends of the blades will be gathered up by the fan and ultimately discharged from the casing without injury either to the fan or to the casing. By arranging all of the blades or buckets upon one side of the disk and by extending the shaft from the other side of the disk and not through the disk as ordinarily, a clear passage is provided between the disk and the inlet of the casing and there is no shaft tending to obstruct the passage ofmaterial.

The blades may be reinforced along their edges 8 by strips 10 of any suitable material.

The inclosing casing of the fan has not been illustrated in the drawing as it forms no part of the present invention.

What is claimed is A fan including a disk, a shaft secured, at one end, to the center of one side of the disk, and a series of buckets disposed radially upon the other side of the disk and spaced apart at their inner ends, each bucket being made up of a segmental blank having straight edges disposed at right angles to each other, one straight edge por tion of each blank being secured to the disk, and each of the blanks being curved rear- Wardly from said secured straight edge portion and thence forwardly in the direction of rotation of the disk, the curved edge of the segmental blank constituting the curved advancing edge of the bucket and receding rearwardly from the outer toward the inner end of the bucket and thence forwardly to the secured straight edge of the bucket, the other straight edge portion of the blank following the curvature of the a bent blank, the inner portions of the curved advancing edges of the buckets constituting means for deflecting materials toward the 15 GEO. W. SMITH. JOHN GARY.

Witnesses:

M. R. BRENNAN, WM. SHENnEMYER.

Images