US839386A - Ventilating-fan. - Google Patents

Description

. Figi. I .f

.Witnessesa Thvemtior. f Lems' L Holladay. gm': L WM@ Atty PATENTBD'DEG.' 25, 190s;

` Y' UNITED" sTATns PATENT .orrron.

No.:agaq t I Winnaar-.italmgtst`14,ie3. stiamo.169.484.

f 'Beit kn'own that .-I,fLEw Ts LJHolLLAnA/r,

'I y" a-citizen of the United States,l residing at Lynm inthe vcou'ntyof Essex, VState Iof Massa chusetts, have invented certain new and useimprovements invVentilating Fans, of'

i ventilating-fans, and. 'more particularly to .design that class of rotary fans which are adapted to be automatically shiftedl about la pivoted axis, so that' the air-blast created thereby sweeps over a considerable area instead of bee ing confined toone particular path.

The object of my invention is to provide an improved device of this character 'and in whichvoscillationsabout a pivotal axis are produced bythe thrust ofits own air-blast controlled by means which may be applied to the ordinary forms of motor-fans in such a manner-as not to detract fromtheir general or appearance. v j

The Vinvention consists in combining with a4 pivotally-supported motor-fan' means for screening more or less of the air-impelling member on alternate sides of the pivotal axis and. means for reversing the position of the screeningmeans.

y. vMy invention will be readily understood upon reference lto the following description and the accompanying drawings, formingv a part of this specification, in which-' Figure 1 is a side elevation of a pivotally-y supported motor-fan embodying one form of my invention; and Fig; 2 is a front elevation thereof with ,thel blast-impelling member removed. The motor A, the armature-shaft B, to which the blast-impelling blades C are connected, and the u right supportingebase D y may be of any of t e ordinary constructions.

The upright base D. is carried by a subbase 1 l and pivotally supportedthereon about a pivotal axis by a concentric ball-bearing 2 located near the eripheries ofthe bases.

, The means or screening the blades C, so that the air thrust thereon will be unequal on opposite sides of the plane of the axes of rota- 'tion and oscillation, consists of an eccentric plate o r sector'S, supported. in proximity to the blades C and adapted .to ,be shifted from I its position on one side of the plane of the axes, as indicated in Fig. 2, t`o they `o posit'e side thereof. The sector 3 is provide with'a,

subbase D.

Lewis noLLr/:inxnon LYNN, j MASSACHUSETTS, Assreuon Thorens-.h aAL..;nLE cTR1c onwaar. A CORPORATION or New `vonk.

Patented ineens, 190e.

side lug 4, having an aperture throughwhich the shaft B passes, and is securedlby a rowof rivets 5, concentric with the aperture,to a sleeved block 6, journaled uponzthejshaft. The block 6 has projecting radially from its rearend an arm 7, having .an outwardlyflaring recess`8 therein and adapted toengageat its respective'o'uter edges with stop projecf tions 9, secured to the front end of t e frame -4 of the motorA to prevent the sector?, from swinging beyond its respective'operative positions when shifted from one to t e other.

The means for shifting the sector'3 from one side of the' vertical `plane to the other consists of a narrow lever 10, pivoted at itsl inner end about the shaft B, extending 'outwardly through the flaring recess 8 and ada ted by the lost motion permitted bythe wi e s ace between the flaring walls of the recess, W ich constitute spaced shoulders, to normally rest with its outer. end below the horizontal plane of the shaft B, so that when it meets some stationary'part 11 as it' is carried along in the oscillation of the fan about its vertical axis it will be' caused to turn, downwardly and rearwardly, carrying .with it the sector 3 until the center of gravity of the latter has been moved to the opposite side of its pivotal point, 4when the disk will fall underthe action. of gravity to its reversed position andl produce a counter oscillation of the fan. The

stationary part 11'consists of an outturned end of a bracket 12, extending'up from the In the arrangement shown each oscillation `comprises a complete rotation of lthe fan.

However, lncases where 1t 1s desirable to restrict the movement of the fan to oscillations of less than three hundred and sixty degrees a second bracket 12 may be provided, which will be spaced from the firstfdistanceproportional to the length of oscillations desired.

I. do not desire to restrict myself to the particular embodiment herein described and illustrated, for it is apparent that it may be lchanged and modified yin many respects without departing from my invention.

What I claim as new, and desire to secure vby Letters Patent of the United States, is-

- 1. The combination with a pivotally-supported ventilating-fan, of a screen mountedI on the axis of the blast-impelling member with its center of effective area normally to one side of said axis, and means for moving mally 13o one side of said axis, and meali-.ior 7 l ported ventilatng-fen, of a screenpvotel y mounted en the axis of the blast-impelling -.f^'1e.nf1ber with 'ats ce1-iter ofefec-t ve aren normf'vmg said screen from one side to che other sc'reenfrom one side to 3, Te combination with a pivoiallyesl.1p-V

portal ventilmingfan, of screen mounted on the axis of the blast-impelling membel,

' and lmesme .t9 -Lmt the movement of saiii .-screen.

L The oombiiiiitiom With'a pivotally-supported Ventilating-fan, of a screen. mounted .spaced s. Y poijted be..-Ween said shoulders and adopted for eceentrie movementzinproxrit to the blast-imelling memberthereof an having ouldere ithereon, land eglev r,r sup,- to engfzge some sationaiy part.'i

he combination of a'pivotxLlly-'suppol'ted ven'.lzemtinfig-fsm7 of a sleeved block 3011i'- naled upon tbe shit of the blestmpellir member thereof and provided with a radiifl recess, a screen secured abone ed e to said blOk, tending v4through said`recess inthe block and ladfoted to engage some' .tntonomy-part.

. In WitneF-Q whereof I .have'hereunto set my hand this lzh day of Au ust, 1903.

' LEWIS HOLL'ADAY. -Witnesses JOHN Ji WALKER.

and a lever lpivoted upon sai shaft ex-v

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