US999890A - Oscillating motor-driven fan. - Google Patents

Description

HfM. sHEpD. OSCILLATING MOTOR DRIVEN'FAN.

APPLICATION FILED NOV. 29,1909.

Patentd Aug. 8,1911.

. IAWITNESSEJS:

UNITED STATES PATENroFmioE;

HA aRY M. SHEDD, or ROSELLE, NEW JERSEY, ASSIGNOR TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A coRPoRArroN or 'IPENNSYLVANIA;

oscILLnTINe MOTOR-DRIVEN FAN;

To vall whom it my concern:

Be it known that I," HARRY M. SHEDD, of

' the borough of Roselle, county of Union,

' shall be simple and compact in structure and effective in operation, and the oscillatory movements of which shall be effected by the expenditure of a relatively smal amount of power.

In the accompanying drawing, Figure l is a view, partially in side elevation and partially in section, of a fan embodying my invention, portions of the structure being also broken away. Fig. 2 is a sectional view of a portion of the structure shown in Fig. 1.

The upper portion 2 of the base 1 of the fanais of cylindrical or cup form and in it is located a cylindrical block 3 of less external diameter than the internal diameter of the cup, the block 3 being provided with an inclined guide here shown as a groove 4 of helical form, the respective ends of which are approximately 90 apart, t-hough'the form and length may be varied from what is shown, if desired. i

The bottom portion 5 of the fan motor body 6 rests upon a-suitable bearing member or shoulder 7 'at the top of the. cylindrical block 3 and is fastened in position by means of a bolt 8 which extends through a central opening therein and also through corresponding holes in the block 3 and the bottom of the cylindrical portion 2 of the. base.

A hole 9 is provided at one side of theportion 5 of the fan motor casing through which projects a bar 10, the lower end of which is provided with a roller 11 to fit into the cam groove 4 in the cylindricalblock 3. The upper end of the bar 10 is provided with a similar roller 12 which engages an annular groove 13 in the face of a disk 14, to be hereinafter more fully described.

"The shaft 15 of the armature 16 of the Specification ofLetters Patent. Patented Aug; 8, 1911, Applicationfiled November 29, 1909. Serial No. 536,504; 1

fan motor has suitable bearings at the ends v of thecasing 6 and upon its front end are mounted fan blades 17, a suitable guard 18 being attached to the front end of the casing 6, as is usua in such devices. Loosely mounted upon the shaft 15, within the eas ing and between the front end of the arms ture lo and the fan blades,is a gear wheel 19 having a recessed rear side, the periphery of the recess being provided with gear teeth to be engaged bya gear wheel 20 that is rotatably supported upon a suitable bracket 21 with which, the casing 6 is provided. The gear wheel 20 also meshes with a pinion 22 that is rigidly mounted upon a shaft- 15, the gear members 19, 20 and 22 being of such relative proportions that the motor may drive the member 19 atsuch reduced speed as may be desired.

The disk 14 is adjustably attached to the front face of the gearmember 19 by means of thumb screws 23 and cooperating Sl)tS 24:, an in ermed ate slot 25 being provided in the disk to receive the shaft 15. The disk 14 may be adjusted along'the faceof the gear member 19 to bring it into concentric relation therewith, or it may be adjusted to any degree of eccentricity, be tween the. extreme position shown in the drawing and the point of concentric relation. by loosening the thumb screws 23 and moving it until. the desired adjusted position is attained, when the thumb screws may be tightened.

When the parts are in the positions shown in the drawings. and the motor is in operation, the fan blades will be-revolved at high speed and, by reason of the reducing gearing 19, 20 'and 22, the disk 14 will be turned at; a greatly reduced speed. As the disk is turned, it will reciprocate the bar 10 longitudinally through a range which is dependent upon the degree of eccentricity to which it is adjusted, and, as sidewise mowem: llc, the ba is prevented by-the opening 9 in which it loosely fits, the helical groove 4' will cause'the motor and fan to turn upon a vertical axis through such' an angle as will be determined by the character It will be understood that any well known anddesired types of bearings may be employed for the rotatable parts; that .the speed-reducing gearing between the motor shaft and the disk l-t may be modified as desired and that the cam elements pertaining to the parts 2, 3, and 14F. may be modified in form and dimensions (as by substituting projections for recesses and vice versa) without departing from my invention, it being merely essential that an eccentric operating surface shall be so combined with-an in-- 7 face and said cam surface to effect oscillatory movements of the fan body.

2. In a motor-driven fan, the combination witha stationarybase having a helical cam surface, of a fan. motor pivotally mounted on said base, a disk eccentrically mounted upon the said motor and having an annular operating surface, speed-reducing gearing between the motor shaft and said disk and a longitudinally.movable bar interposed be tween the annular operating surface on said disk and the helical cam surface of said base.

3. In a motor-driven fan, the combination with a base having a cylindrical part provided with a helical cam groove, of a fan 'motor pivotally mounted" upon said base, an eccentrically mounted disk having an an nular groove, speed-reducing gearing be tween said disk and the motor shaft and a reciprocatory bar interposed between said cam groove and the helical groove in said base.

4. In a motor-driven fan, the combination with a base having a cup-shaped recess in its top and a cylindrical block mounted in said recess and provided with a helical cam groove, of a fan motor pivotally mounted upon said base, speed-reducing gearing, a disk having an annular groove and adjustably mounted upon the slow-speed member of said gearing, and a longitudinally movable bar having projections at its ends to respectively engage the-groove in said disk and the helical cam groove in said base.

5. In a motor-driven fan, the combination with a base having a helical cai'n surface in its upper portion, of a fan motor pivotally mounted upon said base, a disk having an annular bearing surface, a connecting .bar mounted to permit longitudinal movement only and having its ends respectively provided with means to engage said annular groove and said cam surface, speed-reducing gearing between said disk and the shaft of said motor and means for adjusting the eccentricity of said disk with reference to said motor shaft.

6. In a motor-driven fan, the combination \vith a base having a cylindrical part provided \vithfan inclined guide surface, of a 'fan motor pivotally mounted upon said base, speed-reducing gearing driven by the shaft of said motor, a disk member eccentrically mounted upon the slow'speed member of said gearing'and having an annular operating surface, and a longitudinally movable bar, the respective ends of which make operative engagement with said guide --surface and said annular operating. surface.

7. In a motor-driven fan, the combination with a base having acylindrical part pro vided with an inclined guide surface, of a fan motor pi votally mounted upon said base,

speed-reducing gearing driven by the shaft of said motor and having an operating cam surface upon its slow-speed member and a longitudinally movable member the respective ends of which make operative engagement withsaid inclined-guide surface and said operating cam surface.

Signed at Roselle, New Jersey, this 27th day of November, 1909. v

' HARRY MLSHEDD.

\Vitnesscs:

Pnrnn L. UGI-IA'ITA, 'JNO. II. Dn Gnorr

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