US1377300A - Manufacture of fans - Google Patents

Description

RENEWED FEB. 17, I921.

Patented May 10, 1921.

2 $HEETS-SHEET 1.

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P. H. WITHINGTON.

MANUFACTURE OF FANS. APPLICATION FILED sEPT.8. 1917. RENEWED FEB 17,1921.

1,377,300. Patented May 10, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

PHILIP H. WITHINGTON, OF CLEVELAND, OHIO, ASSIGNORilO THE SPARKS- WITHINGTON COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

MANUFACTURE OF FANS.

Specification of Letters Patent.

Application filed September 8, 1917, Serial No. 190,358. Renewed February 17, 1921. Serial No. 445,867.

To all whom it may concern:

Be it known that I, PHILIP H. WITHING- TON, a citizen of the United States, and resident of Cleveland, in the county of Guyahoga, in the State of Ohio, have invented new and useful Improvements in the Mannfacture of Fans, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in the manufacture of fans, and is designed more particularly for the production of fans adapted for use in the cooling of automobile or other engines, either directly or by water circulation through radiators and the like.

The primary object of the invention is to produce a simple and economical method of manufacturing fans for any purpose, with specific reference to those described resulting in a material and substantial saving in the metal material of which the fans are formed.

A further object is to produce a method by which a plurality of fan blanks, in this instance two blanks, are cut, stamped or punched from a single strip of metal by one and the same set of dies at a single operation, thereby effecting an economy in time with the possibility of a material increase of output for any given eriod of time.

Other objects and a vantages relate to the details of construction and arrangement and the method of effecting the same, as will more clearly appear. from the following description, taken in connection with the accompanying drawings, in which Figure l is a view of a strip ofmetal from which two fan blanks are out or punched, the dotted lines indicating the outline of the completed blanks.

Fig. 2 is a view of a fan blank.

Fig. 3 is a view of a portion of fan blank indicating the method of rolling the rim over a wire bail.

Fig. 4 is a cross section on line 44,

Fig. 5 is a view of the fan blank after the rim has been rolled over the wire bail of Fig. 3, the rim being then bent into circular form and its ends connected preferably in the manner indicated, by utilizing the wire bail for this purpose.

Fig. 6 is a view similar to Fig. 5 showing a central web having arms secured to respective blades.

Fig. 7 is a view of the fan structure of Fig. 6, taken at right angles to Fig. 6.

In order that these fan blanks may be exped tiously and economically cut or punched, a sheet metal strip A is employed having, in the specific illustration shown, a width slightly greater than the radial length of the completed fan blade plus twice the width of the rim integral with the blade so that the opposite longitudinal edges of the strip may form separate rims,each having integral therewith a series of blades cut from the portion of the blank intermediate these longitudinal edges or rims.

From each strip A of a predetermined len th, two fan blanks --1- are cut or punched at a single operation, along the dotted lines indicated in Fig. 1. Each blank comprises a rim 2- and a series of blades 3 having a portion of one end integral with the rim and another portion of such end separated from the rim to permit its deflection to one side of the rim, as hereinafter described.

After the fan blanks have been punched from a strip -A, which may be of any suitable length, the rim 2 is first rolled over a wire bail 4 and preferably. as shown, the bail projects at 5- from one end of the rim while at the opposite end it terminates within the rim at a point spaced from the end of the rim a distance substantially equal to the length of the projecting portion 5. The rim carrying the blades -3 is then bent into circular form, as shown in Fig. 5, and the projecting portion 5- of the bail is inserted within the opposite end of the rim to lock the adjacent portions of the rim together, the projecting portion 5 and the portion of the rim within which it is inserted preferably being secured together in any suitable manner, as by welding, rolling or beading.

The free end portion 6 of the blades may then be deflected laterally of the rim to the desired extent, preferably wholly to one side of the rim, and if desired the corner portions -7- may likewise be deflected slightly to the opposite side of the rim if desired. The deflection of these latter portions may be essential when the bases of the blades are of such width as to overlie each other when the rim portion is bent into circular form. 1

Arms -8-, as shown formed integral with a central web -9, are secured to the The construction of these latter partsforms no portion of the invention herein and need not be further illustrated or described.

The preferred method involves the formation of a fan by the series of steps described and in the sequence described, but it will be readily apparent that the order in which these 0 erations are performed may be varied. is for instance, the blades may be deflected before the rim is bent into circular form, or the rim may be bent into circular form before the same is rolled as over the wire bail shown, all without departing from the spirit of this invention as set forth in the appended claims, and although the claims set forth a series of steps in sequence,

the arms to the blades Under certain conditions, the blank shown in Flg. 2 may be bent into circular form without rolling the rim and without utiliz-v ing the wire bail, and the ends of the rim may be secured relatively to each other in suitable or desirable manner. hat I claim is The method of manufacturing fans comprising formin a flat fan blank comprising a rim and bla es integral with and extending laterally from one: side of the rim and separated from the rim for a portion of their width by slots, bending the rim in circular form, deflecting the portions of the blades separated from the rim,by slots so that they are out of alinement with the rim and securing a eentralweb to the radiating blades.

In witness whereof I have hereunto set my hand this 29 day of Au st, 1917.

PHILIP H. WI HINGTON.

Witnesses:

LILLIAN E. WUNDERLIOH, HENRY C. MENKE.

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