US1517169A

US1517169A - Oscillating fan

Info

Publication number: US1517169A
Application number: US672646A
Authority: US
Inventors: Rogers Daniel Evan
Original assignee: VERITYS Ltd
Current assignee: VERITYS Ltd
Priority date: 1923-11-03
Filing date: 1923-11-03
Publication date: 1924-11-25
Anticipated expiration: 1941-11-25

Description

- D. E. ROGERS OSCILLATING FAN @had Nov. :5, 1923 3 Shams-Sheet l mmm 11H1 l i y d/ www.. 25, i924.

D. E. ROGERS OSCILLATING FAN Filed NOV. 3,

3 Sheets-Sheet 2 M 21, 3924. LSIWJISQ D. E. ROGERS OSCILLATING FAN Flad Nov. 5, 1923 3 Sheets-Sheet 3 Patented Nov. 25, i924.

1 i ramt DANIEL nvnnnoegiins, ,partiell/riparian, ENGLAND, lissenola ro vnarvs Lr'nrrn'n, or Astron, BIRMINGHAM, ENGLAND, e BRITISH contenir.

esem-Lamine ran.

Application led `November 3, 1923. Serial No. 672,646.

To all l0/10m, t may/concern- Be it known that I, DANIEL EVAN Roenes,

a subject of the King of Great Britain, re-

sinding at Plume and Victoria iVorks, Plume Street, Aston, Birmingham, England, electrical engineer, have invented certain newv and useful Improvements in @seillating Fans, of which the following 'is a specification. y

It has heretofore been proposed to construct an oscillating' fan wherein the fan wheel'is automatically oscillated about two axes substantially at right-angles to one another by the rotation of the fan wheel shaft, using for the purpose a circular undulating rack with which a driving pinion gears and a link jointedly connecting a stationary carrier or base to a crank plate which is driven from the fan wheelv shaft.

This invention relates to an oscillating fan of the type just referred tov wherein combined oscillations are effected by a combination of parts comprising a crank pin driven from the kfan wheel shaft, and a. connecting rod and a link or equivalent parts,

whereby said crank pin is jointed-ly connected to a stationary carrier bracket of the fan and to a frame or part which can oscillate `on said bracket and on which frame 3'0 or part the fan wheel can oscillate. lhen the fan wheel shaft revolves the mechanism imparts to the fan wheel a sort or continnous -gyratory motion, swinging the fan wheel simultaneously up and down and sideways.

The mechanism of the invention is of a very simple character, and is particularly suitable tothe particular type of electrically driven fan now so extensively used wherein the motor casing is mounted upon trunnions of a bifurcated frame. which in turn is pivotedly mounted upon a fixed lnfacket or pedestal, and a single ronnecting rod and a single link serve to jointedly connect the crank pin to the carrier bracket and to the oscillating frame or part.

The motor casing is left free to rock upon its trunnions, and the frame is left free to partly revolve within the bracket or pedestal. A worm carried by the fan wheel shaft drives, through a worm wheel, a small shaft to which a crank plate is attached, which small shaft may be provided with a hand operated clutch to disconnect the "5 oscillating mechanism from the fan wheel shaft. A. connecting rod is universally pivoted at one of its ends to the. crank pin and at its other end to a plate or arm connected to the pivoting peg of the bracket or pedestal. Upon this peg the bifurcated frame is mounted to partly revolve 'or oscillate. vA. lilik jointedly connects a peg;` ot the bifurcated frame with the connectingl rodat a point near the crank plate. i

A friction clutch is provided between the crank plate and the fan wheel shaft so that if the oscillations of the tan wheel are forcibly stopped by any outside agency the mechanism will not be damaged, Wbut will immediately pick up again when the fan wheel is released, and it .is preferable to conceal this clutch within the crank plate itself.

The connection between the crank pin and the crankplate is preferably made adjustable-in order that the extent of oscillation of the fan wheel in making its substantially `gyratory oscillating movements may be adjusted.

The pegs of the bracket or pedestal and ofthe bifurcated frame to which the connecting rod and link are attached are pref erably disposedv within the bifurcation of theV frame.

The accompanying drawings show the iuvention, in its most desirable form. applied to `a well known type of electrically driven oscillating fan.

Fig. l is a side elevation, partly in section.

Fig. 2 is -a rear elevation, also partly in section.

Fig. 3 is a plan view, partly in section, showing the clutch associated with the crank plate, the manner in which the crank pin .is adjust-ed on the crank plate, and the connections between the crank pin and the pedestal and between the crank pin and the frame which supports the motor casing.

Fig'. 4i is a detail representing' how the connection between the crank pin and, the crank plate is adjusted to vary the amount of oscillation of the fan wheel.

The casing a, wit-hin which the electric motorl is fitted and through which the fan wheel shaft c extends, is substantially of the usual construction, being mounted to rock freely upon trunnions d, d having' bearings within the branches e2, e3 of a bifurcated frame e which is arranged for part revolution. upon, a stationary bracket or pedestal.

lll)

f. f2 is a rigid peg rising from the bracket or pedestal f, over which the bifurcated frame e is mounted and supported to freely partly revolve on an antifriction bearing, such as a ball bearing f3.

Rigidly attached to the rear end of the fan wheel shaft c is a worm g which revolves concentrically with said shaft, within va lateral extension a2 of the casing a is mounted a worm wheel ZL which gears with the worm and drive a small shaft 71,2 which, by a reducing toothed gear, 7a3, 7b4, revolves a crank plate z' revolubly carried by the extension a2 of the casing a. To the crank pin 'Z2 of this crank plate is jointedly connected one end y2 of a connecting rod j, whose other end '7'3 is jointedly connected to an upstanding peg Z2 of an attachment plate Z fixed to the stationary upright peg f2 of the bracket or pedestal The jointings of this connecting` rod to the crank ypin Z2 and to the peg Z2 are of such a character as to provide substantially universal joints at the ends of the connecting rod. The peg Z2 is always stationary, that is to say its position is constant, and it forms the principal abutment from which the oscillating movements of the fan wheel are forced. n

m is a link jointedly connected at its one end m2 to the connecting rod j near the crank plate, and jointedly connected at its other end m2 to a peg a extending upwardly from the base of the bifurcated frame e, the jointings of this link to the peg n and to the connecting rod being such as to provide substantially universal joints at the ends of the said link.

The peg fn, is a fixture on the bifurcated frame e and always moves therewith, and its osition is set oif from the axis of swing of Jdhe bifurcated frame upon the peg f2.

In action, as the crank plate 'i is revolved from the fan wheel shaft, the connecting rod y' automatically partly revolves the bifurcated fra-me e about the peg f2, to thereby oscillate the fan wheel in one. direction, while the connecting rod m compels the swing of the casing a within the frame c upon the trunnions (Z, cZ, to thereby oscillate the fan wheel in a direction at a right angle to the rotation on the peg f2, but these two directions of oscillation are so combined by the cofaction of the connecting rod and link to impartto t-he fan wheel an oscillating movement of a substantially gyratory character, that is to say, combined oscillation in both directions simultaneously.

A friction clutch between the crank plate z' and the fan wheel shaft c is provided in connection with' an enlargement 02 of the crank plate shaft 0. This clutch may be in the form of a small ball g working in a radial bore of the crank plate Z and a coiled spring g2 behind said ball to cause the ball to enter a semi-spherical depression c3 in the enlarged part 02 of the shaft 0. If through any cause the casing a is held against oscillation in its frame or said frame is held against rotation on the pedestal, the ball q is forced out of the depression of the shaft 0 so that said shaft may revolve against the ball pressure by overcoming said pressure. The spring g2 is backed up by the adjustable screw g3, so that its pressure on the ball may be adjusted. This clutch is concealed within the thickness of the crank plate. Any other suitable form of clutch may be tted to allow of the rotation of the crank plate being forcibly stopped, if oscillation of the fan wheel is accidentally prevented.

The crank pin is adjustable as to throw. Its head i3 engages a T-sectioned radial slot 'Z2 in the crank plate (Figs. 3 and l), along which slot said pin is adjustable and may be clamped in adjusted position by a screwnut Z5, which clamping does not affect the free rocking of the end of the connecting rod j on said crank pin.

A hand-operated member r is slidably mounted upon an extension, r2 of the shaft h2 and is keyed to said extension. The worm wheel 7L is loosely mounted on the shaft 71,2 This member r can slide upon the extension r2 to the limit of the space r3, and upon its underside carries rigid pegs r4 to engage two of a number of corresponding sinkings in the upper face of the worm wheel 7L, so that said worm wheel only drives the shaft 7b2 through the member r, which slides friction-tight upon the shaft extension. When the member r is actuated to disengage the pegs thereof from the worm wheel L- the worm wheel revolves freely on the shaft h2 without imparting motion to the shaft7 so that by said disengagement the oscillating movements of the fan can bestopped.

The essential features of the invention, hereinafter specifically defined in the claims, are the combination with a crank pin driven by the fan wheel shaft of the connecting rod 7' and the link m, or equivalent parts, whereby said Crank pin is jointedly connected to the stationary carrier bracket f and to the frame or part e which can oscillate on said bracket and ou which frame or part the fan wheel can also oscillate, and it will be undcrstood that in the carrying out of these fea turcs various changes in detail construction may be necessary all within the spirit of the i invention.

Having now described my invention what l claim and desire to secure by Letters Patent is l. An electrically driven oscillating fau, comprising a pedestal, a frame mounted for partial rotation on said pedestal, a casing mounted to rock in said frame on an axis at an angle to the axis of rotation of said frame on said pedestal, a fan shaft rotating in said casing, a crank rotated by said fan shaft, a link having one of its ends connected to said crank and its other end connected to said pedestal at a point eccentric to the axis about which said frame partially rotates on said pedestal and means connecting said crank to said frame at a point eccentric to the axis of rotation of said frame on said pedestal.

2. An electrically driven oscillatingl fan according to claim l, wherein the connection between the crank and the frame comprises a link havingl one of its ends pivotally connected to the frame at a point eccentric to thc axis of rotation of said frame on the pedestal and having its other end pivotally connected to the other link.

3. An electrically driven oscillating fan according to Claim 1, wherein the means for rotating the crank from the fan shaft comprises a worm on said fan shaft, a counter shaft associated with said crank and adapted to drive the latter, a worm wheel loosely mounted on said counter-shaft and.

engaging said worm, and manually operable means for locking said worm wheel to and releasing it from said counter-shaft.

4. An electrically driven oscillatingfan, comprising a pedestal, a frame mounted `for partial rotation on said pedestal, a casing` mounted to rock in said frame on an axis at an angle to the axis of rotation of said frame on said pedestal, a fan shaft rotating in said casing, a rotatable disc driven by said fan shaft, a crank pin adjustable radially of said disc, and links connecting Said crank pin to said Yframe at a point eccentric to its axis of ratation on said pedestal and to said pedestal eccentrically of the axis of rotation of said frame on the pedestal, re spectively.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DANIEL EVAN ROGERS.

Vitnesses GEO. FUERY, JOHN P. FUERY.