US2542735A - Fan guard mounting - Google Patents

Description

Feb. 20, 1951 J, v H 2,542,735

FAN GUARD MOUNTING Filed May 27, 1948 Ewvgwrow, JOHN ME WEG H) Patented Feb. 20, 1951 UNITED STATES PATENT OFFICE John H. Viewegh, Indianapolis, Ind.

Application May 27, 1948, Serial No. 29,541

1 Claim. 1

This invention relates to means for mounting a fan guard upon a motor which drives the fan. A primary object of the invention is to provide mounting means whereby the guard may be mounted on a motor irrespective of its diameter of possible mounting location. In other words the invention resides in providing means for mounting the guard on motors of varying diameters, and particularly of varying diameters of locations of through-bolts. By reason of the peculiar mounting means forming the gist of the invention, the number of different sizes and devices for mounting the guard are reduced to a minimum. While there may be considerable variation in the diameters of motors driving a certain diameter fan, the guard may be mounted on any one of those motors without having to change the guard itself in any respect.

These and other objects and advantages of the invention will become apparent to those versed in the art in the following description of one particular form of the invention as illustrated in the accompanying drawing, in which,

Fig. l is a View in front elevation of a structure embodying the invention;

Fig. 2, a view in side elevation; and 3 Fig. 3, a detail on an enlarged scale in section on the line 33 in Fig. 1.

Referring to the drawing, wherein like charac ters of reference indicated like parts in the several views thereof, the fan guard designated generally by the numeral ii] is made in the usual manner to have primarily on its rear side a pair of circular hoops H and I2, the hoop I I at the rear being of a smaller diameter than is the diameter of the hoop i2 which is spaced forwardly a distance from the hoop I I. In other words the planes of these two hoops H and I2 are spaced one from the other, normally in vertical positions.

A plurality of bars, herein shown as being formed of fiat bar stock and generally indicated by the numeral I3, four of the bars being employed in the present illustration, are equally spaced one from the other circumferentially around and in interconnecting positions between the hoops II and I2. As best indicated in Fig. 3, the outer end of each bar I3 is wrapped around the hoop E2, to form an eye 14 so as to securely grip that hoop I2. The other end portion of the bar I3 is carried across the outer side of the hoop II and secured thereto in any suitable manner such as by welding. From the weld position, the end portion of the bar I3 in each instance is 2 carried inwardly in a plane parallel to the plane of the hoop I I to form a foot I5.

To each of these feet I5 is rockably secured an arm It by any suitable means, such as by a rivet II which passes through the foot I5 and through an end portion of the arm l8. Each of these arms I6 extends from the pivot rivet I! by a straight length and then terminates in an end portion I8 which is turned substantially at right angles to the major length by a finger constituting that end portion I8.

When the guard I0 is mounted to encircle the fan I9 and brought up to the end portion of the motor Ziibehind the fan I9, these arms I6 are presented in a manner whereby the major lengths thereof will be substantially tangential to a circumferential portion of the motor 20 and the fingers I8 turned inwardly therefrom toward the motor. As is the case with most fan motors, there are a plurality of bolt ends 2I projecting from the end of the motor, four in number as a rule, to tie tog-ether the motor ends 22 and 23 against the cylindrical central member 24 which carries the poles of the motor. Advantage is taken of this fact by engaging the ends of the fingers I8 under nuts 25 carried on these bolts 2|. In other words these arms I6 are swung to the position whereby holes provided in the end portions of the fingers I8 will register with and permit the bolts 2| to extend therethrough so that the nuts 25 may be pulled up against the outer faces of these fingers. Therefore it is obvious that these arms I6 may be rocked about their pivot rivets I! to accommodate the fingers I8 to various diameters of bolt circles which may be encountered on different types of motors. And it is also obvious that the diameter of these bolts may vary considerably and still be within the permissible range for attachment of these fingers I8 to the motor.

While I have herein shown and described my invention in the one particular form, it is obvious that structural changesmay be employed without departing from the spirit of the invention, and I therefore do'not desire to be limited to that precise form beyond the limitations which may be imposed by the following claim.

I claim:

For a motor having a plurality of securing members circumferentially spaced apart on a circle having its center coincident with the axis of said motor, means for mounting a fan guard having a rear hoop, said means comprising a plurality of circumferentially spaced apart arms rockably secured to said rear hoop to be limited 4 to swing toward and away from said motor in a REFERENCES CITED plane Para11e1 t q rear hoop; and ,finger The following references are of record in the on each arm directed inwardly at substantially a file of this patent. right angle relative to its respective arm toward said motor for interengagement respectively 5 UNITED STATES PATENTS with one of said securing members, each of said Numb Na e Dat fingers being presented in a commo plane p 515,405 Meston Feb. 27, 1894 1e1 to said rear hoop; the lengths of Sa arms 955,209 Rubin Apr. 19, 1910 being such that they will be substantially n- 1,173,563 Griffin Feb, 29, 1916 gential wand entirely outside of said-circle when 10 said fingers are engaged with said securing members.

JOHN H. VIEWEGH.

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