US1384155A - Fan - Google Patents

Description

R. A. ROSSOE.

FAN.

APPLICATION man JAN. 2. 191a. 1 384: 1 551 Patented July 12, 1921,-

n s SHEETS-SHEET 1- R. A. ROSSOE FAN.

APPLICATION man JAN. 2. 191a.

Patented July 112, 1921.

3 SHEETS-SHEET 3.

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cairn stares RAGNAR A. ROSSOE, OF CHICAGO, ILLINOIS, ASSIGNOR TO IT. S. PRODUCTS CORPORA- TION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FAN.

'1 0 (all whom it may concern:

Be it known that I, RAGNAR A. Rosson, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Fans, of which the following is a full, clear, concise, and exact description reference being had to the ac companying drawings, forming a part of this specification.

My invention relates to fans.

I have found that the fans constructed for use in connection with automobile radiators are highly inefficient, poorly designed and excessive in weight and cost.

The result is that radiators, even if of good design, do not develop the proper capacity and cause overheating of the cooling medium.

The object of my invention is to provide an improved fan of high efficiency, low in cost of construction and strong and depend able in mechanical structure.

I do not intend to limit my invention to fans for automobiles, but consider that the improvements which I have outlined may be applicable in other relations.

In the patent to Halvorsen No. 1,031,5et5, granted July 2nd 1912, there are disclosed the principles involved in the construction of a screw propeller of high efiiciency. I have adapted the principles therein formulated to the use of propelling air,that is, the design of the fan.

In the accompanying drawings I have illustrated my invention as applied to a radiator fan for a well known type of automobile.

It is well known that in this particular type of automobile the capacity of the radiator is insufficient to keep the engine cool, particularly when the same is operating on heavy load at relatively low speed.

In the accompanying drawings Figure 1 is a front elevation of a fan constructed in accordance with my invention;

Fig. 2 is a side elevation of the same;

ig. is an elevation of one section of the fan;

Fig. 4 is a fragmentary cross section illustrating the manner of attaching one section to an adjacent section;

Fig. 5 is an exploded view of the pulley and bushings;

Fig. 6 is a sectional view taken on line Specification of Letters Patent.

Patented July I2, 1921. Serial no. 209,857.

6-6 of Fig. 1 showing the pulley members, fan hubs, and bushings in assembled form;

Fig. 7 is a sectional view of a modified form of my fan;

Fig. 8 is a sectional view of the above form adapted for the reception of ball bearings; and

Fig. 9 is a fragmentary detail section of a modified construction of the above.

I construct the fan shown in the drawings from sheet metal. The fan consists of a plurality of sections which are jointed together, as will be described later. These sections are stamped from flat metal in the outline shown in general in Fig. 3 by means of the dotted lines 1. The section comprises a fan portion 2 and a hub portion 8, this hub portion having a rearwardly projecting portion l which becomes flanged for attaching to the driving pulley 5.

After the section is blanked out, the hub portion 3 is formed as is shown in full lines in Fig. 3 and also as shown in Fig. 4. This hub portion is formed into a section of a cylinder as shown at 6 with a flange 7 at the rear edge of the same. This forming is preferably done by stamping at a single operation. An attaching portion 8 extends from the edge of the cylindrical hub portion 6 and is adapted to be joined to the blade portion of the adjacent section, as by means of the rivets 9 (see Fig. l).

After the hub portion has been formed, the'blade portion 2 is stamped or formed into the curvature shown in Figs. 1 and 2 s previously explained. the blade is formed according to the principle set out in the above mentioned I-Ialvorsen patent.

Then the sections have been secured together to form a complete fan, the pulley 5 is attached to the flanges T which are trimmed to a circular or arcuatc formation. The pulley 5 comprises a pair of flanged cup members 101O placed back to back so that the bottoms ll of the cups form the web of the pulley. The flanges 12 serve to guide the belt and prevent it from running off the pulley.

As shown in section in Fig. 6, the flange 7 of the hub portion of each section is attached to the web of the pulley 5 by means of rivets 13 which extend through the web of the pulley and through the flange lel of a collar 15 that is placed upon the other side of the web.

' Fig. 7 I attach the fan The structure thus far described forms a light but very strong fan and pulley structure. This structure is provided with bearings by means of the bearing bushings 16 and 17 which are introduced into opposite endsof the bore of the fan and pulley structure above described. The bushing 17 is of a,

length such that it extends through the flange collar and through the bore of the web of the pulley 11 into the bore of the cylindrical hub formed by'the curved portion 6. The bushing 16 extends into the bore formed by the curved portion 6 and thus the two bushings 16 and 17 are brought into alinement very readily.

ln the modified embodiment illustrated in sections together by welding and equip the fan with a crowned pulley formed of a single piece of metal. In this form the rear portion 1 of each fan section is made considerably longer than in the previous embodiment to enable these portions to extendentirely through the pulley to support the same and for attaching to the web of the pulley, this web being on the side of the pulley farthermost from the fan. The fan sections are blocked out with the outer edge 20 of the rear portion 1 inclined slightly toward the axis of the fan as shown. The sections are assembled as previously described with the exception that the-attaching portions 8" are spot welded to the blades 2 at the points 21 rather than riveted. The succeeding step is to cut flat faces 22 on the inclined edges 20 of all four sections by one simultaneous operation of a circular die. This assures that the annular seat for the edge of the crowned pulley 5 affordedby these flat faces 22 will be concentric with the axis of the fan. The blanks are recessed as shown at 23 so that the above die operation will leave a clean cut.

The pulley 5 is formed with the marginal flanges 2-l'25 bein crowned between these flanges to secure'more effective belt contact.

The rear flange is shaped back upon itself to form the web 26 of the pulley. The resulting pulley is of cup-shape with open and closed ends. edge of the pulley 5 bears uponand 18 mgidly supported by the flat faces 22 of the rear portions 4: These four rear portions 4 constitute longitudinal webs for radially bracing the open end of the pulley 5". The radial web 26 of the pulley is'spot welded (or riveted) at flanges 7 of each of the fan sect-ions.

In Fig. 8 I have shown the type of fan just described adapted for the reception of ball bearings 30-31. The fan sections are formed and assembled in substantially the same manner as described with the exception that in this embodiment the edges 20 of the rear portions 4' are illustrated as out In mounted position the open the polnts 27-27 to the fan, the faces 22 these edges for the open end of parallel to the axis of the projecting slightly .bove receiving and supporting the cup shaped nulley 5.

A sleeve 32 its into the hub of the assembled fan for alining the outer races 33- 3 l of the ball bearings. This sleeve is desirable though not essential for this purpose.

The rear race 33 has a flange 33 at the rear edge thereof which bears against the web 26 extending between it and the end of the sleeve 32. The flange 34 of the front race seats in an annular recess 32' formed in the front end of the sleeve 32. The inner races 35-36 are mounted on the spindle 37 and have fabric oil retaining rings thereon which engage the outer races and seal the ends of the bearings against leakage of lubricating oil from the interior of the sleeve 32. This oil is admitted through the oil cup 38 which also functions as a key to rigidly secure the fan to the sleeve 32. A nut 42 threads upon the front end of the spindle 37 for adjusting the inner races of the bearings and is keyed or pinned to the spindle in any suitable manner. The ball bearings are designed for assuming both the radial and thrust loads of the fan. A hub cap 39 seats 'in the recess 32, being retained therein by a small split ring 4.0 engaging in an annular'groove in the recess 32. Instead of recessing the end of the sleeve 32 it may be given an annular offset 4L1 as shown in Fig. 9, forreceiving the flanged end of the outerrace 34 and the hub cap 39.

I find the practice of spot welding the fan sections and pulley together more expeditious than riveting inasmuch as the labor involved in cutting the rivet holes is avoided. Moreover the welded fan is equally as strong as the riveted fan and neater in appearance. I It will be apparent that the riveted form of fan illustrated in Figs. 1 to 6 is also adaptable to the provision of ball bearings in much the same manner as yifust described in connection with the welded I have made tests comparing the efficiency 115 of the fan constructed as above described with thestandard fan employed on a well known make of car and I find that the eliiciency under various, conditions is higher I from 10 to 100 per cent. than that of the 120 fan furnished with the'vehicle. r

I do not intend to be limited'to the precise details of construction shown and described.

I claim: r V

1. In a fan, a plurality of sections; each comprising a segmental hub portion lyingin a substantially circumferential plane, an integral blade portion lying in a radial plane, anattachin'g portionfthe attaching portions 130 ill) of the sections being connected to the respective blade portions of adjacent sections.

2. In a fan, a plurality of sections each comprising a blade portion, ahub portion extending normally to the blade portion and an attaching portion and means for securing the sections together with the attaching portions of one section rigidly connected to the blade portion of another section.

3. in a fan, the combination with, a plurality of sections, each section comprising a blade portion and a hub portion, said hub portion extending axially from the blade portion, said extension comprising a radial flange, of a radial plate for connecting said radial flanges together.

i. In combination, a plurality of fan sec tions, each comprising an integral blade, a hub portion, said hub portion comprising a radial flange, and a pulley having a radial attaching plate'ior attaching the same to the radial flange of each hub portion.

5. In combination, a plurality of fan sections, each comprising an integral blade and hub portion, said hub portion comprising a radial flange and having a tubular bore, a pulley comprising a pair of cup-shaped members placed back to back to form a central radial web, a flanged collar for engaging' one side of said web, said flanged hub sections being attached to the other side of the web and a bushing projecting through the collar and through the pulley into said tubular bore.

6. In combination, a plurality of fan sections, each comprising an integral blade por tion and a hub portion, said hub portion comprising a tubular bore and having a ra dial flange, a pulley having a radial attach-- ing face for attaching to the radial flange of each hub portion and a bushing projecting through the pulley and into the tubular bore of the hub portion.

7. In combination, a plurality of fan sections each comprising an integral blade, a hub portion, and-a radial flange on said hub portion, said sections being attached together, a pulley having a radial web at one edge thereof, the hub portions of said fan sections extending through said pulley and the radial flanges being attached to the fadial web of said pulley.

8. In combination, a fan comprising a plurality of fan sections each having a blade portion, a hub portion and a segmental flange on said hub portion, a pulley for said 'lan, said pulley having its web or spider at one edge thereof, the hub portions of said fan sections extending through said pulley, said segmental flanges being attached to the web of said pulley.

9. In combination, a fan comprising a plurality of fan sections each having an integral blade and hub-portion, said hub portion having a radial flange and a longitudinal web, and a pulley having a radial web at one edge thereof for attaching to the radial flanges of each hub portion, the other edge of said pulley being supported by the longitudinal webs on said portions.

10. In combination, a fan comprising a plurality of fan sections each having a blade portion, a hub portion, an attaching portion, and a segmental flange on one end of said hub portion, said sections being secured together by connection between said attaching and blade portions, a pulley for said fan, said pulley being formed of one piece of metal and having a crowned periphery, a web or spider at one edge of said pulley and integral therewith, said hub portions extending axially through said pulley, said segmental flanges being attached to said web or spider.

11. In combination, a fan comprising plurality of fan sections, each having a blade portion, a hub portion, and a radial flange on said hub portion, a pulley having its web secured to the radial flanges of said fan sections, a sleeve within said hub portions, a spindle within said sleeve and anti-friction bearings between said sleeve and said spindle.

12. In combination, a fan comprising a plurality of fan sections each having a blade portion, a hub portion, and a radial flange on said hub portion, a pulley having its web secured to the radial flanges of said fan section, a sleeve within said hub portions, means for keying said sleeve and said hub portions together, a spindle within said sleeve, ball bearings between said sleeve and i said spindle, a cap member seated in the end or said sleeve, and a retaining ring for said cap member engaging in a groove in the end of said sleeve.

13. In combination, a fan composed 01'' a plurality of fan sections, radial segments on each of said fan sections, and an integral pulley comprising a pulley :t'ace, flanges, and a radial web or spider, said web or spider being secured to said radial segments.

In witness whereof I hereunto subscribe my name this 21st day of December, A. D.

RAG-NAB A. ROSSOE.

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