US1634554A

US1634554A - Fan

Info

Publication number: US1634554A
Application number: US73654A
Authority: US
Inventors: Pajalic Antonio
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-12-07
Filing date: 1925-12-07
Publication date: 1927-07-05
Anticipated expiration: 1944-07-05

Description

Patented July 5, 1927.

UNITED STATES PATENT" OFFICE.

ANTONIO PAJALIO, or DETROIT, MICHIGAN Application filed December air, the fan being adapted to disseminate or radiate heat and keep heated air in motion for cooling purposes.

My invention aims to provide a motor driven fan that may be finished to enhance or harmonize with the, finish of a motor or engine, and thus not detract from the general appearance of the motor or engine. This is desirable in connection with engines of automobiles when the motors or engines are displayed alone and in many instances have cheap, unsightly fans that detract from the workmanship and design of the motor or engine. The construction of my. fan permits of a degree of ornamentation being embodied in the fan so that in addition to mechanical features there will be pleas ing lines of design or ornamentation.

My invention further aims to construct a fan body of twoor more dissimilar metals,

one metal affording a rigid and durable fan element and the other a covering or finishing element adapted to more rapidly disseminate heat than the covered elements. Still further, the metallic elements provide a fan, propeller or like member that possess all the advantages of a wooden propeller and more, because the metal elements are susceptible to durable fabrication and possess greater strength and usefulness.

My invention will be hereinafter specifically described and then claimed, and reference will now be had to the drawings, wherein a Figure 1 is a front elevation of the fan;

Fig. 2 is a sectional View taken on the line IIII- of Fig. 1;

Fig. 3 is a rear elevation of the fan body, and

Fig. 4 is an enlarged cross sectional view taken on the line IV-IV of Fig. 3.

The reference numeral 1 denotes an inner fan element or member cut, stamped, and pressed from sheet metal to provide a bulging or conveXo-concave hub portion 2 and radially disposed blade members 3', which as shown are preferably in opposed relation. This fan element or member maybe made of aluminum, iron or other durable metal and in some instances may be cast thus possessing the requisite degree of rigidity necessary 1n a fan or propeller body. The

v FAN.

7, 1925. Serial No. 73,654.

blades 3 have neck portions extending forwardly and outwardly at an inclination from the member 1, thus placing the greater part of the blades 3 in a plane in advance of the member 1, so'that the member ;1 or the central portion of the fan will have adished or countersunk configuration. Each of the blades 3 are convexo-concave in cross section and radiating from the member 1 and the neck portions 4 of the blades are embossed portions 5 adding rigidity to the neck portions ofsaid blades. At intervals throughout the length of each blade are bosses or spacing members 6 and the marginal edges of each blade are slightly offset, as at 7 for the purpose that will hereinafter appearj 8 denotes an outer fan element ormemher which has a central embossed hub portion 9 that may take the formof a rosette or other ornamentation. Embossing the hub portion 9 lends rigidity to the same and provides an air chamber or space 10 which materially aids in the dissipation of heat. The outer element or member 8 is made of copper or a good conducting. material that may be easily fashioned to form a cover for the member 1 and its blades 3. Similar to the member 1 there are blades 11 having neck portions 12 and thefbladesll are convene-concave in cross section with the, marginal edges of said blades terminating in flanges 13 that are inturned and swaged over the offset edges 7 of the blades 3 with the flanges 13 flush with the inner faces of the blades 3 to form a smooth and continuous joint with said blades, so that each blade of the fan will have a finished and rounded off appearance.

The blades 11 are embossed to provide

stiffening members

14 and 15 with the latter more pronounced or of greater depth than the former. These stiffening members receive the spacing members 6 and the outer spacing members are of greater depth than the inner members so that the

stiffening members

14 and 15 will be pressed against collapse if subjected to an ordinary blow. The stiffening members 14 merge into the necks 19 and extend from one neck portion to the other neck portion of adjacent blades, thus further contributing to a design configuration about the hub of the fan, as best shown in Fig. 1.

The members 1 and 8 are connected together by a plurality of screw bolts 16 or other fastening means entering the peripheral flange 17 of a conical shaped hollow hub 18 which serves as a lubricant reservoir and is provided with a detachable plug 19 so that it may be filled with grease, oil or a suitable lubricant. Axially of the hub 18 is a bearing 20 for a spindle 21, shaft or other member on which the fan is mounted and adapted to be driven thereby. The bearing 20 is ported, as at 22, so that the lubricant can easily reach the spindle 21 and caps, washers, nuts and other devices, generally designated 23 may be employed for securing the bearing 20 on the spindle 21 so as to establish a driving relation.

From the foregoing it will be observed that the hub portions of the members 1 and 8 and the blades 3 and 11 are spaced apart to the extent of providing substantially a hollow fan body and the air gaps between the blade members 3 and 11 contribute to the dissemination of heat when the fan is used in a. heated zone or supported from a motor or engine and driven thereby as a cooling device. In using a copper cover or facing for the fan it is obvious that the copper serves as a conductor and will consequently cause a greater dissipation of heat than the other metal entering into the construction of the fan body. The copper being susceptible to embossing and clean finishing permits of a degree of ornamenta tion which is not possible with ordinary galvanized iron fans, and it is obvious that the blades of the fan may be fashioned to provide a desired contour for the specific purpose for which the. fan may be employed.

One embodiment of my invention is to be illustrated, but it is to be understood that the structural elements are susceptible to such variations and modifications as fall within the scope of the appended claims.

What I claim is a.

1. A fan comprising two sheets of metal cut and stamped to provide members, which are spaced apart and one of said members embossed to brace the other member and maintain the spaced relation of said members, each member having a hub portion and blades, one of said members serving as an outer cover over the other member, and means securing the hub portions of said members together.

2. A fan comprising members fashioned to provide hub portions and blades, the

blades of said members having marginal cast metal and possessing greater conductivity, said malleable metal cover having a portion thereof spaced from said cast metal.

4. A fan comprising matched metallic members secured together and forming blades and a hub portion, said members being connected together about the hub portion and the members spaced apart longitudinally of the blades and at the hub portion, the greater part of the hub portion being dished and substantially in the plane of said blades.

5. A fan as called for in claim i, and a hollow hub connected to said fan by the same securing means connecting said members.

In testimony whereof I affix my signature.

ANTONIO PAJALIG.