Патент USA US2385773код для вставки
Oct. 2, 1945. ' ' ' J. c':. BIIRITTINGHAM " BAFFLE MOUNTING FOR AIR CIRCULATOR UNITS 2,385,773 I _ Filed 001,20, 1943 , INVENTOR; Jams QBR/TTINGHAM' 5W1”? ' ATTORNEY Patented Oct. 2, 1945 UNITED STATES PATIENT OFFICE“, 2,385,773 BAFFLE MOUNTING FOR. AIR C‘IRCULATOR UNITS ' James C. Brittingham, St. Louis, Mo. Application October 20, 1943, Serial No. 507,225 (01. 230-274) 15 Claims. culator units, the baffle being formed to provide This invention relates to improvements in baffle mounting for air circulator units, and more par ticularly to an improved floating arrangement of baffle elements utilized in room air circulators, usually in functional combination with motor linear air directing channels de?nedin‘part by protuberances .on‘the baf?ing surface; the im-‘ proved construction of ba?le further including particularly-shaped marginal portions. adapted to effect delivery of the de?ected air streami at a more desirable angle, and in a more. favorable Each of the more usua1 and widely sold types pattern. ' ' _ j‘ of portable room air circulating units embodies Yet another object of the invention ‘may be an electric motor of vertical shaft type, a propel ler fan driven thereby, and a baffle arranged 19 stated as attained in apendularly mounted ba?le andimproved mounting means therefor, in such across the fan discharge stream in such manner a combination that the baffle‘ is located in the as to cause de?ection of the air delivered by the driven fans. . discharge stream of the fan, in such ‘a’relation fan, in a generally annular pattern of a some what upward trend. Until recently, with but few unimportant exceptions, no provisions were us as to attain a novel air-directing and -de?ecting result, but without back-pressure effects on the fan, thus providing for a “free-air” relationship made for varying the pattern. of the air stream discharged from the unit; nor for selectively di of the fan to the otherv elements of the unit. " T The foregoing and numerous other objectswill .more clearly appear from the following detailed major partof the fan output in a ‘given direc 20 description of a preferred embodiment of the im-, provements in a circulator unit, particularly tion from the unit, this was nevertheless impos when the description is read in conjunction‘with sible of attainment by any fully satisfactory recting the air stream. For this reason, even though it is frequently desirableto direct all or a ;» means. It is accordingly a major object of the present invention to enable, automatically under g = the accompanying drawing, in which: . I Fig; 1 is a top or plan View of a room-air cir at least certain conditions, the direction of, the -25 culator of portable type, embodying present im air stream from a circulator unit of the type in provements; fan. ~ . g tion, of the assembly or unit, and directed for maximum comfort, and without ma terial loss of the full displacement effect of the - . . , Fig. 2 is a side elevational view, partly in sec ' discussion, in a more or less defined beam or path at ' v a - Fig. 3 is a fragmentary sectional view of the assembly, as taken on line 3-3 of Fig. 1. Referring now by characters of referenceto Another object of the invention is attained in provisions for a self adjusting baffle in a room circulator, such as to render the unit automati cally capable of shifting the direction of a major the drawing, the present improvements are by preference although notstrictly necessarily em bodied in a portable room air circulating unit, in an improved baf?e mounting provides for a self varying angularity of baf?e resulting in an auto‘ upwardly somewhat beyond the elements In and part of the air stream, when the unit is placed ' ' which, as illustrated, there is a frame including four, but if desired, some fewer or more, upright near external obstructions-such as a wall or par or pillar elements, two of which are indicated at tition, or when obstructed on more than‘ one of In and II respectively and two more generally its sides, as when located in the corner of a room or other enclosure. In keeping with this object, , --v ‘indicated at l2 and i3; the latter columns are matically directional. damping device. Yet another important object of the invention is attained in an arrangement of fan and ba?le , in a unit of. the general type described, such as to obtain an effect corresponding substantially to _ that of an oscillating type of desk fan, yet not requiring any- translatory movement of the fan, for reasons hereinafter better appearing, extended. I l. The vertical columns are structurally secured in angularly spaced relation through a pair or more of frame bands,’ one being sh'own at H at the lower portion of the frame, and anotherat .15 in an upper portion. The frame bands 14 and I5 are shown as securely attached to the up rights by means of rivets or the like I6.- , 1 tained in combination-with some or all of the ‘ A cylindrical grille element I1 is supported by, securely ?xed to and serves to bridge'the frame bands I4 and I5; This grille may assume a variety of forms, but is shown as constructed of agencies identi?ed with attainment of the fore going objects, and in combination therewith an with grille-like end members l9 andi?p nor any mechanical actuation of the cooperating ~ baffle. . , Yet an additional object of the invention is at improved arrangement for varying a tentatively ' ' ?xed angularity of vba-i’lle in a room air circulator sheet metal, profusely apertured, andis provided . Suspended from the lower band M or ‘if, de ‘sired, directly’from the columns l0, ll, l2 and I3, or some thereof, are a plurality of motor supporting' arms 2! which are conveniently A further important object of the invention is bolted to the frame of the motor 22 at their in- . attained in an improved design of tiltable ba?le member designed particularly for use in air cir 60 ner ends, and secured as by certain of the rivets unit. : ' 2 2,385,773 l6, either to the band [4 or to some or all of this relationship it has been found that, with ‘the parts proportioned and spaced substantially the uprights In, H, I2 and I3, As will appear, and in keeping with frequent as shown by the drawing, when utilizing a 10" practice now well known, the motor shaft which propeller type fan 24, the ba?le should be at least is vertical, "extends upwardly from the motor 5 of an area corresponding’ to that of a circular frame 22, being indicated as 23, and at or near ba?le of 15" diameter. its outer end serves to carry and to rotate, a pro¢ The design of the ba?le and the aXis rod ele peller type fan generally indicated at 24. Such ement 35 therefor is such that the baffle is sup adjuncts as make for convenience of lifting the 1 ' ported in the unit and directly in the line of air unit from place to place, and for other purposes, 10 discharge flow from' the fan, in a condition of may be added as desired, but are not of them selves material to the present invention It may however be noted as desirable to provide .a motor controlling unit generally indicated at 25 em bodying a control knob 26, and providing "for a ‘15 plurality of di?erent motor speeds whereby to regulate the ‘fan speed, hence to govern air ide livery by the unit. _ ' , ' delicate or sensitive physical balance, and by fur ther preference, is mounted in such a manner that friction at rest is minimized. Provision to this end is made in the structure illustrated by disposingsay a pair of spaced bearing assem blies which are of rolling antifriction type,_such as ball bearings, these being.eenera11yindwaied at 36, and 31. Each such-assembly includes, by v preference an'inner race and an ‘outer race, the . ,While-most usefully employed in functional combination with the elements described, the 720 inner race serving to ‘receive‘the shaft or rod 35 present ‘improvements: are, identi?ed principally ' and the outer race Welded, rivetedor otherwise sions for a novel function oftheba?le as will now ‘secured, preferably to the adjacent arm 3|. It will now have clearly appeared that, assuming be described. the rod 35 to be stationary, the baffle is free to withv the ba?le mounting and structural provi-V ' ' , It ,is contemplated that innormal use the baf ,25 oscillate under in?uence of ?uctuations of air ?e, generally indicated atBO, shall be iioatingly and pendularly mounted transversely of the air velocity and pressure‘ on its different portions on stream delivered, preferably upwardly as by fan For the purpose ofrendering the' baffle sensi opposite sides of its-supporting pivot. 24. By preference, butobviously not necessarily, tive to effects tending to cause occasional oscil the ba?ie 30is substantially circular in planand 30 lations thereof about its axis, it will have ap ' inthe example shown, its .faceportionencoun peared as desirable that the‘ba?‘le be‘ formed with its ,center of mass’, and center of gravity located appreciably below, and in the relation of a pen tered by the. air stream isv of_ a substantially planar aspect. The bai?e 30 is provided with a pair of upwardly extended suPDQrting arms 3i, dulum to the axis ofba?le oscillation, in the pres each of which is, aperturedto receive a bearing 35 cut example, this axis being identi?ed withv the or otherwise constitute a journalling portion, co ' rod 35. This results from thefact that the rod acting with ._a pivot rod,_later described; The ‘35 is, when a circularbaille is utilized, extended ballle 30 is further preferably (provided with a diametrally of but somewhat above the ba?le, so that equal ‘masses of the latter are- disposed on plurality of parallel, spacedudepending, ,plfotuberl ant rib or ?ange portions which may be'vformed 4;; ‘opposite sides of the rod. , integrally with the body of the baffle, and’ are generally designated at 32. This provisioniis, of V , it tends to resolve the rotary components or mo ilt'will now have appeared that theupwardly pTgjECting arms 3| "by Which the bai?eetil is di~ rectly supported, result in the behavior of the ba'?ie ‘somewhat in ace'ordance with the laws gov tion of the ‘fan stream,_so as, to a greater ex 45 erning pendular motion. This effect'is of course ‘distinct advantage in, a 'tiltableba?ie, ‘I in that tent, to straighten and de?nitely to direction the ‘air stream, particularly when the baflle is tilted. modi?ed by the elTect of the air pressure on the ba?le, particularly uneven air pressures on dif MA ifurther'improvement in construction of the baiile-t?, is seen in ‘the provision of slightly down fer-entyportions of the b'a?le." Having inmind that, under most-conditions of usage, with the turned lip elements, 33, there being one of these 50 ‘fan 24 rotating at a uniform selected speed, the by preference on each of the opposite margins ofthe baffle 30 in iocations'remote from the pivot ba?le will assume an oscillatory or swinging-move ment, it may be desirable as a matter of per axis of the ba?ie. It will now readily ‘appear sonal preference of the user, to be able to regu~ that,‘ when the ba?le is depressed atone side of , late or adjust ‘the amplitude-and hence the period the unit-the lip formation 33 at ohe high side‘of 55 or’frequency of motion of the ba?le. This re the ba?le, will: tend markedly to de?ect, toward sult is conveniently accomplished’ by providing __the horizontal, the stream of air delivered from ~ba?le 30 with adepending threaded rod or the the lip-carrying margin ‘of the ba?le. " ' The baf?e' is further preferably formed in like shown at'38, threadedly engaging which, for purposes of adjustment?s a counterweight nut order to permit 'a freedom of swinging movement, 60 39.“ This need be only of moderate mass, and it with a pairv of oppositely disposed apertures or slots 38, each of these being‘of a size to receive has been found that the rod38 need be of no ‘great length since the action of'the baille is nicely therethrough-the adjacent upright element such sensitive even to minor adjustments of thek'coun as l2 or l-3, by which the baffle is supported terweight '39 on the rod 38." It Will be under throughthe agency of a pivot rod 35; a‘ It will 65 stood’ that the device is operative without ‘this now readily appear that the extremities of the slotted openings 34 will, at either extreme of os added convenience and facility for adjustment, cillation of ba?ie' 30, coact with the adjacent upright element [2 or 13, in‘a manner de?nitely As a convenient means of- assembling the piv ot-forming vrod >35 to the frame of the unit,‘ the V to limit the range or amplitude of swinging ‘mo tion of the bal?e. ' ' , " "j , Another preference in constructing the ba?le, ‘is-that it shall be somewhat greater ‘in area, and ‘if circular, of a somewhat largervdiameterpthan although the feature is highly desirable. _ 70 ends of‘the-rod may be threaded and extended ‘ through suitable transverse, openings 43 in _the ‘opposite paired columns’or uprights I2 an~d,j_3. Nuts 44 may be employed in threaded engage ment ‘with the ends of the rod 35,, whereby thediain-eter of'the-fan 24. As one example of 75 through clamping actuation 7of' the nuts 44 the 3 2,885,773 the total air stream, in unwanted directions rod 35» may be ?xedly positioned with respect to the frame. If desired, a plurality of different sets of the apertures 43 may be provided, to permit, by setting the rod in different sets of openings, a vertical adjustment of the baffle distantly with respect to the fan. radially of the unit. . ‘ As heretofore noted, it is a preference to con struct the baffle of a considerably greater area than the diameter of the fan or other displace ment agency. The reason for this preference in relative diameter of fan and ba?ie, arises in sub stantial degree’ by reason of an important feature _ Due to special conditions existing in a given room or other enclosure, it may at times be de of construction and combination, namely, the provision of a secondary or auxiliary bailie 50. sirableto ?x the angular position of the baffle 30 with respect to the fan stream. Under such conditions it is merely necessary to thread down This member is preferably an inverted frusto conical de?ector, but may be of other suitable, even planar form, preferably of two parts, ‘wardly each of the one or more baffle clamping screws 45 so as to bring the end of the screw mounted centrally of the unit, and in the upper rod 35. The screws 45 each extends threadedly 15 head or end portion IQ of the enclosure about the fan, as by the bolt 5|, through which the two through a tapped bushing or nut 46’Which may parts of the baflle are clamped to the element l9. be welded into a suitable opening therefor in a This auxiliary ba?le 50 has an effect of divert‘ cover member 41, or some equivalent structure , into ?rm contact with the underlying portion of employed to protect the bearing assemblies 36' and 31. The desired ?xed angular position of the baf ?e 30 is ?rst determined by effect, then with the baf?e manually positioned at the desired angu larity, the locking screws 45 are actuated as de scribed. ' Proceeding now with a description of the nor mal function of the exemplary embodiment of the improvements‘, it results from the fact of the sensitively balanced mounting of the baf?e about its axis that the air stream from the fan 24, in perfectly quiet ambient air and with no obstruc ing the air radially outwardly and upwardly, so that the principal impact effect of the resulting annular stream therebeyond, is upon the periph eral or marginal areas of the baf?e 30 and only to a very minor extent centrally thereof. Al though the baf?e 30 is operative with a consider 25 ably improved e?ect and with many advantages over stationary baflle structures heretofore char acterizing the art, in the absence of baffle 50, the provision of the auxiliary baffle serves to make the ba?le 36 considerably more readily and 30' de?nitely responsive to the fan stream than would otherwise be the case. tion of any nature in or near the unit, the air pressure against the sides of the baffling surface of member 30 will be exactly equal. Thus the balanced condition “of the ba?le tends at, all times to keep it stationary, and when used with a ver tical fan as shown, in a horizontal plane. But for the pro vision of the auxiliary baffle‘ 50, the free oscil lating action of baffle 36 is in a measure undesir ably responsive to strong drafts of outside air 35 and similar uncontrollable effects, whereas the ‘In practice, however, the condition just de— scribed is at nearly all times and in nearly all locations only theoretical. Experience in numer ous trials over a protracted period of usage of a provision of the auxiliary ba?le 50 serves dis tinctly to bring the oscillating or angular ad justing action of baffle 30 solely under the con trol of the fan. It thereby serves practically to eliminate unwanted effects of stray air currents. It will now have appeared that the improve device such as that illustrated, indicates that ‘ments presently selected for description, serve normal movements of air in a room, and the fully to attain each of the several objects and ad- . rebound effect from obstructions to the air vantages above speci?cally stated, as well as other stream, even those relatively remote from the unit, are such as to produce frequent disturb 45 important improved results implied from the de scription of parts and their arrangements. ances of the uniform air stream delivered by the ‘fan. From this it results that under practically all conditions when the fan 24 is operating, the baffle 30 Will exhibit an oscillating motion about its axis, the obvious effect of which, on the room 50 occupants, approximates'that of an oscillating desk fan. The condition just described obtains only in case the unit is not disposed close to a wall, piece of furniture, or other similar object. Although the invention has been described by making detailed reference to a single preferred embodiment thereof, the detail of description is to be understood solely in an instructive and not in any limiting sense, numerous variants of structure and function being possible within the scope of the claims hereunto appended. I claim as my invention: ' 1. In a portable air circulator unit including a In the latter case the baffle becomes self-position 55 vertical-shaft fan and fan driving means, a nor ing or self-adjusting in angularity. Due to the mally horizontal baille at least coextensive with drop in velocity on the obstructed side of the the disc area of the fan, and pivotal supporting unit, that side of the baffle will sharply dip, the means by which the baffle is mounted in balanced baffle will become relatively stationary in a tilted position, and will serve advantageously to de 60 condition in the unit transversely of the fan stream, and being so arranged that substantial liver the major part of the air stream in the di ly equal areas of the baf?e are located on opposite rection of the high side of the baffle. A com parison of a unit equipped with the present im provements with older types, in which either the sides of the pivotal supporting means, whereby > the fan stream normally acts to maintain the > ba?ie is ?xedly horizontal or is susceptible of 65 transverse position of the ba?le. 2. In an air circulator unit of portable type, a only manual placement at different angles, re horizontal propeller fan and driving motor there veals a marked improvement in the automatical for, a baffle of an area to extend substantially ly adjusting feature of the current subject mat fully across the fan stream, for directing the air ter. In the event of automatic dip of the baf ?e as described, resulting in the described ef 70 stream of the fan in an annular direction about the unit, with the fan arranged to deliver the air fect of self-damping of the air ?owing toward the stream against the ba?le and outwardly thereof in obstructed side of the unit, there is but anegli substantially a free-air arrangement, and pivot gible loss of total air delivery by the unit. The for mounting the baffle with substantially present improvements thus automatically pre 75 means equal ba?‘le surface on opposite sides of the pivot vent the delivery of substantial proportions of '4 I 238157273 axis, and‘ with the ‘baii‘le relatively sensitively bal anced about its axis, whereby the baffle is ar the air'streambf the fan somewhat forwardly ‘ ranged to dip in response to a reduction of air ?ow toward any region of obstruction laterally beyond the ba?le, and to dip toward such region of »- relative obstruction while correspondingly raising an opposite portion of the baffle, whereby thereof, and so arranged for tilting movement for various angular presentations to the fan stream, the ba?‘le being‘ provided with a plurality of sub stantially rectilinear air directing surfaces each of which is of a trend substantially at a right an: gle to the ‘pivot axis of the baffle. ' to provide for an increase of air flow toward the 11. In a circular unit including a fan and fan relatively unobstructed regions beyond the unit. motor, a battle press-formed of a sheet material, 3. Incombination in a portable air circulator 10 means for mounting the ba?ie in the unit in a se-' , unit including a, vertical-shaft propeller type fan lectively tiltable relation, the baffle being formed and fan driving means, a baffle, means provid ing ,a pivotal support for the baffle along a hori zontal axis, and maintaining the bafrle in a condi to provide a plurality of spaced integral linear protuberances from its de?ecting surfaces, said protuberances being of such location and spacing tion of sensitive balance normally ina position .15 as to de?ne linear channels therebetween. transversely of the fan air stream, and consid 12. In an air circulator unit including a fan and erably- upward of the fan, the ba?le being of a fan motor, a ba?ie mounted for tilting movement substantially greater area than the area of the so as to be disposable in‘ various ‘angular posi fan-circle. tions across the air stream, the ba?le being char 4. In combination in a portable room air cir 20 acterized by oppositely disposed downturned lip culator, including a vertical shaft fan and fan formations on its opposite margins remote from driving means, a circular ba?‘le, means providing its axis of tilting movement, said margins being lalsubstantially horizontal, diametral pivot axis formed, when the battle is tilted, so that one there about which the ba?le is freely movable, and the ‘ of serves to direct the air emanating from the unit baffle being of such form and provided with an 25 in a more nearly horizontal trend than the major auxiliary pendular weight so arranged that the center of gravity of the movable ba?le structure lies below its axis of movement, whereby the baille is suspended in pendular relation. remaining surface of the baffle. 13. In an air circulator unit including a fan and fan driving motor, a bali‘le adapted to'be tilted about an axis for various angular presen 5. In an air circulatorv unit, a fan and driving motor therefor, a pendularly mounted bailie I spaced from the fan in the discharge stream l thereof, and a relatively smaller auxiliary baffle disposed between the’ fan and said pendularly mounted baffle. , 6. In an air circulator unit, a fan and driving , means therefor, a baf?e mounted for free swing ing movement beyond the fan in the discharge stream thereof, and being of substantially larger tations to the air stream from the fan, whereby variously to direct the air stream de?ected by the ba?‘le, the baffle being characterized by a plu rality of rectilinear surfaces tending to channel or beam the air stream delivered by the unit as a v35 result of the de?ecting action of the baffle, and further provided with a pair of opposite, down wardlyturned marginally disposed de?ector lips operable selectively, when the baffle is tilted, to impart a horizontal component of movement to areathan that of the fan circle of said fan, and 40 the baii‘le-de?ected air stream. an auxiliary de?ector of substantially lesser area 14. In a portable room air circulator unit in than that of ‘the fan circle and located substan cluding a vertical-shaft, horizontal fan, a fan‘ , tially inwardly from the swingable baffle. motor, a circular balfle arranged in the unit to ex ,7. In an air circulator unit, a fan and driving tend substantially fully across the fan stream, an means therefor, a sensitively balanced pendularly axis element on which the baffle is normally hori mounted de?ector located across the discharge zontally mounted in a state of sensitive balance, region of the unit, and an auxiliary de?ector of and antifriction bearings of rolling type, serving a substantially frusto-conical type, located appree to journal the baffle in ?oating relation on the ciably inwardly of the ?rst said ba?ie and across axis element thereof. 50 the center area of the fan stream. 15. In a room air circulator unit of portable 8. In a portable air circulator unit, a propeller type, a frame structure including a pair of up type fan and fan motor, a ba?ie of an'area at least right frame members, a fan and fan motor car approximating the disc area of the fan, and bear ried by the frame, and mounted for initial de ing a substantially free air-relation to said fan, livery of air'upwardly through the unit, a baffle and disposed substantially beyond the fan as and 55 in the upper portion of the unit, swingably mount .part of a-pendular system of baii'ie support, said ed across the fan discharge stream, the ba?ie ‘be pendular system including a pivot structure pro ing provided with a pair of upwardly extending viding an axis of ba?le movement which lies arms, and pivot-forming elements by which ‘the across and substantially ‘intermediate the ba?le baffle arms and the upright frame members are area, and means for adjusting the effective 60 connected to permit free oscillating movement of length of the pendulum system of which the baff. ?e is apart. , the baffle, the ba?ie being substantially circular in transverse aspect and formed to present a de-' 9.,The combination and arrangement of ele-. ?ect‘ing area to the fan stream substantially ments substantially as recited by claim 8 in greater than the area of the circle of the‘fan, which the baffle is supported, to provide equal sur 65 and of greater area than the plan area of ‘the faces on opposite sides of a horizontal axis, and frame, the frame including a pair of ba?le-sup the means for adjusting effective pendulum porting upright elements and the baffle being length, is comprised of a threaded rod depend provided with oppositely arranged slotted open ingly supported by the ba?le, and a threaded ‘70 in'gs through which said uprights extend in such weight adjustably carried by ‘the rod.. .manner ‘that the ends of the slots serve to limit 1.0. In an air circulating unit, a fan, driving, the range of swinging movement of the‘ ba?ie. .means for the fan, a baffle pivotally mounted in JAMES C. BRITTINGI-IAM.