US1444923A

US1444923A - Fan blade

Info

Publication number: US1444923A
Application number: US427747A
Authority: US
Inventors: Willard H Kempton
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1920-12-02
Filing date: 1920-12-02
Publication date: 1923-02-13
Anticipated expiration: 1940-02-13

Description

Feb. 13, 1923. 1,444,923

w. H. KEMPTON FAN BLADE Filed Dec. 2, 19,20

Patented Feb. 13,1923.

- 4 uuir rrss s .WILLARD H. KEMPTON, OF'WILKINSBURG, PENNSYLVAN1A,IASSIGNOR T wns'rme HOUSE ELECTRIC & MANUFACTURING COMPANY, A ooarorm'rron or PnNNsYL- VANIA.

. FAN BLADE.

I Application filed December 2,1920. Serial 1:10; 427,747;

To all whom it may concern: a hardened binder, such as a phenolic con- Be it known that 'I, WILLARD H. KEMP- densafion product, is placed in a punch press TON, a citizen of the U-nitedstates, and a provided with a suitable die, so that theaxis resident of VVilkinsburg, in the county of 2 of the tube or section is-at an angle to the 5 Allegheny and State of Pennsylvania, have axis 3 of the die. By manipulating the die invented a new and useful Improvement in so that comes in contact with the, material Fan Blades, of which the following. is a .or tube 1, segments or fan blades 4 are specification. formed having their axes 3 at an angleto My invention relates to fan blades,- more the axis of said tube or section. I I 10 especially to fan blades formed of com- 1 In assembling the blades4on-ahub, their 'posite material such as wove-n fabric, paper axes are placed radial thereto so that the and the like, and a hardened binder curved surface 5, When set in motion, 'ad- Heretofore, it has been customary to form jvances to generate an air current.

fan blades by molding them singly in molds Although I have described a specific 15 of suitable curvature .and size. An abmethod of forming fan blades in accordsorbent sheet material, impregnated with a ance with myinvention, it is obvious to binder having the characteristics of fusing those skilled in the art that various changes and then hardening under heat, .Was formed in details of construction may be made withto the shape of the finished blade by puncnout departing from the principles thereof.

20 ing or cutting, and a plurality of layers to K For instance, any suitable fibrous material form a predetermined thickness of the may be employed in combination with suitfinished blade were assembled in the mold. able binders, or the material maybe molded Heat and pressure Were then applied to form into a number ofshapes having the proper a unitary mass. This-method required concurvature such as curved sheets, strips, hemi 25 siderable labor and was expensive in that spheres and the like. I

it was necessary to preform the material by My method of forming composite fan punching, and the time consumedjin mold- 'blades embodies distinct improvements over ing was excessive, alarge number of exthe prior art. It is simple and' efficient and pensive molds being necessary to obtain is especially adapted for quantity produc- 30 quantity production.- I tion, making it of considerable commercial My invention obviates these difficulties, importance. v it being among the objects-thereof to form I claim as my invention: such articles economicallyyand quickly. 1. A method of forming composite fan a My method comprises molding the mablades which comprises providing a curved 35 aerial into sectionsof hollow cylinders or sheet of fibrous material and a binder and tubes and punching out-fanblades having punching blades therefrom.

their axesat..an angle tothe-axis of the "2. A method of forming composite fan curved material punched, formingthe debladeswhich comprises provlding a curved.

sired contour offanfblade. sheet of fibrous material and a binder and 40 In the accompanying drawings forming f forming blades therefrom.

a part here0f .and in, which similar refer- 3. A method of forming composite fan I enee characters designate similar parts, blades which comprises providing a tube of Fig.1 is "anend view of a hollow cylinder fibrous material and a hardened binder and or tube otmolded material, L forming blades therefrom.

45 Fig. 2' is a plan view of a tube showing 4. A method of forming composite fan Ithe'position of the blades with respect to its blades which comprises providing a curved axis, 4 sheet- 0f fibrous 'materialand a binder and Fig. Bis a plan viewof a.fan' blade made punching blades therefrom, said blades be- 1n accordance. with-my inventiomand ing punched with their axes at an angle to." 50. Figs. land 5 are end and side views the axis of said-curved sheet material."

. thereof, respectively. p

A molded tube 1 or a section thereofsofblades which comprises providing a seption L suitable thickness formed" of fibrous maof atube of fibrous material and a-blnder 'terial such as cloth, paper, and the like, and and punching blades therefrom, sa-id blades 5. A method of forming composite fan 1Q5 i being punched With their axes at an angle tothe axis of said tube section.-

' 6. A method. of forming composite fan blades which comprises providing a tube of fibrous material and a binder,- and punch- -ing blades therefrom, said blades j being ,punched With their axes at an angle to the Y axis ofsaid tube.

densation product, and punching blades therefrom, said blades being punched With their axes at an angle to the axis of said sheet.

8. A method of forming composite fan blades which comprises providing a. curved sheet of textile fibres and a phenolic condensation product, and punching blades therefrom, said blades being punched with their axes atan angle to the axis of said sheet.

In testimony whereof, I have hereunto subscribed 'my name this 22nd day of November, 1920. 3 WILLARD H. KEMPTON.