US1909885A

US1909885A - Fan

Info

Publication number: US1909885A
Application number: US529733A
Authority: US
Inventors: Dana P Ogden
Original assignee: ERWIN F PLUMB
Current assignee: ERWIN F PLUMB
Priority date: 1929-12-17
Filing date: 1931-04-13
Publication date: 1933-05-16
Anticipated expiration: 1950-05-16

Description

May 16, 1933. D. fuo'GDEN 1,909,385

FAN

Original Filed Dec. 17, 1929 Patented May 16, 1933 UNITED STATES PATENT OFFICE i DANA IP. OGDEN, 0F OTTAWA, ILLINOIS, ASSIGNOR 0F ONE-HALF TO ERWIN F. PLUMB, 0F STREATOR, ILLINOIS FAN Original application filed December 17, 1929, Serial No. 414,641. Divided and this application led April This application is a division of my copending application Serial No. 414,641, filed December 17, 1929. The invention relates to fan structure suitable for operationin places where highly heated gases may come into direct Contact with the fan. The fan hereinafter described is intended for use at temperatures of the order of 2000O F., the object of the invention being to provide a fan which can be operated satisfactorily at thosetempera-tures, which is easily assembled, and which can readily be repaired or renewed.`

For a more complete understanding of the invention reference may be had to the description which follows and to the drawing, in which,-

Figure 1 is an elevation, partly in section, of a fan embodying the invention.

Figure 2 is a section on the line 2-2 of Figure 1.

Figure 3 is a perspective View of the fansupporting end of the fan shaft.

Figure 4 is a fragmentary section, similar to Figure 2, showing another form of the invention.

The fan shaft 10 is preferablv split by several slots 11 extending longitudinally from the fan bearing end. The shaft is preferably made of high-resistant metal such as chromium nickel alloys of iron which may be capable of satisfactory operation at temperatures of the order of 2000o F. For example, one such alloy may comprise chromium 30%, nickel 15% and iron 45%. lower temperatures, that is, around 1400o to 1600 F., so-called calorized iron can be used, this consisting of iron which has been packed in aluminum dust and heated for a consi derable time.

The fan blades may be individually cast of suitable metals such as those hercinbefere referred to. As shown in Figures 1 and 2, cach separate blade 12 may have a segmental bead 13 at its inner end. rlhe blades are adapted to slide into the several slots 11, the beads 13 being within the hollow shaft 10, as indicated For somewhat Serial No. 529,733.

adjacent to the outer surface of the shaft 10` to receive suitable pins 14 by which the blades are secured in place. Each blade is preferably formed with a central slot 15 through which may be positioned one or more U- shaped pieces 16 which are riveted as at 17 to the blade. By proper selection of the weight of these U-shaped members inequalities in the weight distribution of the several bla-des of a fan may be compensated for so that the completed fan may be substantial rotative balance. This is of particular importance where fans having vanesof substantial weight are employed and also where they are subjected to severe operating conditions occasioned by direct contact of the hot gases.

If desired, the blades 12 may be cast together integrally with a single hub member 20, as shown in Figure 4. The blades on the hub 20 are angularly spaced so as to enter the several slots 11 simultaneously, the hub 20 beingof suliciently smally diameter to lit in the interior of the hollow shaft 10. In either type of construction, the blades may be held against axial movement on the shaft 10 as by a pair of suitable collars 21, 22 which may be secured on the shaft 10 as by suitable pins or rivets 23.

I claim:

1. A mechanism of the class described comprising a hollow shaft having longitudinally arranged slots, and fan blades having portions extending through said slots and portions engaging the inner wall of said shaft adjacent to said slots.

2. A mechanism of the class described comprising a hollow shaft having longitudinally arranged slots, and fan blades having por-V tions extending through said slots and portions engaging the inner wall of said'shaft adjacent to said slots, said engaging portions `of all of said blades together engaging said inner wall throughout its entire angular eX,n

tent.

3. A mechanism of the class described comsignature. Y

DANA P. OGDEN.

CERTIFICATE 0F CGRRECTION.

Patent No. 1,909,885. May 16, 1933.

DANA P. OGDEN.

1t is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: In the heading to the printed specification, the name of the assignee of one-half interest was erroneously written and printed as "Erwin F. Plumb" whereas said name should have been written and printed as "Ermin F. Plumb" as shown by the record of the case in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 18th day of July, A. D, 1933.

M. J. Moore.

(Seal) Acting Commissioner of Patents.