US2813673A - Tiltable oscillating fan - Google Patents

Tiltable oscillating fan Download PDF

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Publication number
US2813673A
US2813673A US366914A US36691453A US2813673A US 2813673 A US2813673 A US 2813673A US 366914 A US366914 A US 366914A US 36691453 A US36691453 A US 36691453A US 2813673 A US2813673 A US 2813673A
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fan
shell
axis
motor
air
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Expired - Lifetime
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US366914A
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Raymond E Smith
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A C GILBERT CO
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A C GILBERT CO
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/08Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/10Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
    • F04D25/105Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air by changing rotor axis direction, e.g. oscillating fans
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32008Plural distinct articulation axes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/57Distinct end coupler
    • Y10T403/5761Interrupted periphery, e.g., split or segmental, etc.
    • Y10T403/5766Axially divided segments
    • Y10T403/5781Bolted

Description

Nov. 19, 1957 R. E. SMITH 2,813,673

TILTABLE oscI'LLATING FAN Filed July 9, 195s 3 sheets-sheet 1 Nov. 19, 1957 R. E. SMITH 2,813,673 l TILTABLE OSCILLATING FAN Filed July 9, 1953 3 sheets-sheet 2 INVENTOR Wand'rwm ATTORNEY Nov. 19, 1957 R. E. SMITH TILTABLE oscILLATING FAN 3 Sheets-Sheet 3 Filed July 9, 1953 INVENTOR TILTABLE oscrLLArING FAN Raymond E. Smith, Hamden, Conn., assignor to The A. C. Gilbert Company, New Haven, Conn., a corporation of Maryland Application Iuly 9, 1953, Serial N o. 366,914

7 Claims. (Cl. 230-256) This invention relates to fans that combine an ability to swivel independently about two perpendicularly related axes both of which preferably intersect the axis of rotation of the air impeller of the fan.

Further, the present improvements make possible automatic oscillation of a funnel type of tiltable fan unit the organization of whose air displacing parts is disclosed and claimed in Patents Nos. 2,709,035 issued May 24, 1955, 2,672,280 issued March 16, 1954, and 2,660,368 issued November 24, 1953.

One object of the invention is to retain as fully as possible the advantageous features of construction and air displacing eciency of the fan disclosed in said copending applications while enabling it to oscillate automatically at any of the various angles to which it may be tilted relatively to its stationary base, pedestal, or other means of support.

A particular object is to provide a fan capable of tilting adjustment and automatic oscillation which in 'all of its tilting and oscillating movement shall remain confined to the compass of a globe approximating its overall size such as a circular opening in a fan supporting panel designed to ll part of a window space for room ventilating purposes.

These and other objects of the invention will appear in greater particular from the following description of a successful embodiment of the invention having reference to the accompanying drawings wherein all sectional views are to be regarded as looking in the directions of the arrows designating planes on which the sections are taken.

Fig. 1 is a front View in reduced size of a fan embodying the invention showing parts broken away.

Fig. 2 is a view taken in section on. the plane 2 2*` in Fig. l drawn on a preferable full size scale- Fig. 3 is a fragmentary view drawn on the: same scale as Fig. 2 taken in section through the top. oscillating bearing on the plane 3-3 in Fig. 5.

Fig. 4 is a corresponding sectional view through the bottom oscillating bearing taken on the same. plane` 3 3 in Fig. 5.

Fig. 5 is. a plan view of the fan shown in Fig. 1 in part broken away.

Fig. 6 is a View taken in section on theV plane 6 6 in Fig. 5y drawn on the same scale as in Figs. 2, 3i and@ 4.

Fig. 7 is a planA View of the oscillating linkage taken on the plane '1 -7` in Fig. 8 drawn on4 an enlargedt scale.

Fig. & is aside elevation of the fan shown in Fig. 1 with the motor casing and other parts partially broken away to expose the oscillating mechanism and linkage.

Fig. 9 is a fragmentary view taken in section` on the pla-ne 9-9 in Fig. 1 drawn on the same scale as in Fig. 41.

Fig; 1.0 is a fragmentary view taken in sectionl on the plane. 10--10 in Fig. 8 enlarged to preferred actual size.

Fig. 121 is a view taken in section on. the plane 11-1'1 lll Fig., 2.

As described in the. aforesaidf copending.I patents the standard of the presently improved fan comprises a holate t low base 12 incorporating an invertedly dished top span 14 against the under surface of which is xedly fastened, as by welding, the middle portion of a half circle of curved tubing whose ends upstand to form the supporting frame arms 18. 24 is the operating handle of a four position snap switch (not herein shown) contained within the inverted concavity of base 12. The switch handle 24 is accessible at the exterior of the front of the base for switching current to different circuits feeding the fan motor 54 thereby to stop, start, or Vary the speed of running of the fan. The current is derived through a flexible attachment cord 26.

Fan motor 54, its air impeller 55, and a funnel shell structure 28 comprises an assembled air flow generating unit which is pivotally mounted, not directly on the stationary frame arms 18 as in the aforesaid copending application, but on a carrier ring 20 and can oscillate with respect thereto about a diametral axis which, in the full line position of the carrier ring shown in Fig. 8, is disposed vertically. Oscillation of the fan about this vertical axis can range in both angular directions from the front facing position of the flow generating unit shown in full lines in Fig. 5 to broken line positions thereof shown in Fig. 5. Independently thereof the aforesaid vertical axis of oscillation can itself be shifted to selective settings by tilting the carrier ring 20 to various positions represented by broken lines in Fig. 8.

The shell structure 28 of the air streaming unit is composite and forms a hollow funnel consisting for lightness and manufacturing convenience of two drawn, sheet-metal parts. The circumferentially inner part of air conduit shell 46 in conjunction with the shape of impeller hub 32 forms an axially short annular Venturi passageway for the air traveling through the fan in the. direction of arrows F in Figs. 5 and 8 which tapers to a minimum girth of passageway at about the tip of the fan blades 9'0. The circumferentially outer part of the funnel shell structure is a casing shell 44. This casing shell and conduit shell 46 slightly overlap at circular meeting margins in a manner to bind the funnel shell part-s permanently and iixedly together.

The front opening of funnel shell 28' is spanned by a grid 48. The border rim of grid 48 is removably secured by screws 50 in an annular rabbet formed in the front face of casing shell 44. Screws Si) have. threaded engagement with casing 44. The shape in which grid 48 is formed produces intersecting thinV cross vanes S2 of suicient. depth to guide air in the single direction F de sired asl the air passes. through the grid. The thickness of varies S2. tapers according to principles of airfoil contour so that the grid divides the discharge openingA for the impeller driven air into cubicles of honeycomb nature. One function of these cubicles is to counteract Vortex or whirlingv motion of the outstreaming beam nf a1r.

The torpedo shaped body of the fan motor is designated 5.4. It isk coaxial with conduit 46 and derivesits support solely from the funnel shell structure 2S. through the medium of four stiff spider fins 56 eachz oftriangular shape. This. places a. substantial portion of the: length of the motor body in outboard or rearwardly offset relation to funnel shell 28. Fins 56 aref spaced. at equal angles about the motor bod-yl and' are. xed to the case 60 of the latter by lugs 58` welded thereto as is more fully disclosed in the copendin-g; Patent 2,672,280.. The strengthening assistance of three hoops 70, 72, 741 of round Wire is employed. Thesek hoops are' nestedr in notches in the edges ofA the spider tins. Fins 56. are fixed. to conduit shell 46 by holding screw 66I engaging nuts 68 and surrounded.I by vibrationA deadeningwashers 64 of distortable resilient: material.

- lpeler 55 is removably fixed-enfile motor Shaft .711i

3 by set screw 80 which is accessible through a hole in the hub wall of the impeller. ln the present improvement shaft 78 also drives gearing described hereinafter to cause automatic oscillation of the fan.

One construction by which a fan shell such as 28 might be pivotally supported upon the carrier ring is shown and claimed in the Patent 2,660,368. The particular construction of the spider fins 56 and their combination with funnel shell 46 and motor 54 are the subject of claims in Patent 2,672,280 aforesaid.

In the present construction it is preferred to equip opposite sides of the carrier ring 20 respectively with two diametrically aligned trunnions 30 fixed on the outer surface of the ring by Welding or otherwise. The outer end face of each of trunnions 30 is radially notched to receive mating radially directed ridges on the meeting face of a hinge post 32 welded or otherwise secured fixedly to each of the support arms 18. Each of trunnions 30 contains a tapped hole which receives the threaded end of a hinge screw 42 that extends through each arm 18 and hinge post 32 near the top end of the former which end may be plugged with a finishing cap. The head of screw 42 sets iiush with the outer surface of arm 18. The engaging faces of the trunnion and post hold the fan tilting adjustment where set whenever screw 42 is suliciently tightened.

For oscillating motion in relation to ring 20 about an axis diametrically of the latter, shell 28 and its coaxial carried motor body 54 and air impeller 55 are pivotally supported by and concentrically within ring 20 by top and bottom antifrictional bearings 92 and 93, respectively. Top bearing 92 as shown in Figs. 3 and 6 includes a ball bearing unit 94 having its outer ball race nested in a cupped recess or indentation 95 in the sheet metal of casing shell 44 and having its inner ball race sleeved on apivot stud 96 that is flatted and thus lodged xedly against rotation in a corresponding iiatted socket formed by a boss 97 projecting inward of ring 20 from the arcuately curved saddle piece 98 welded or otherwise made fast to ring 20. Stud 96 is maintained in place in the socket of boss 97 by the holding screw 99 that threads into the stud and penetrates the walls of ring 20 and has its head nested flush within a countersunk depression in the outer Wall of the ring.

Bottom bearing 93 as shown in Figs. 4 and 9 includes a similar ball bearing unit 94 coaxial with the ball bearing unit 94 and having its outer ball race nested in a cupped recess or indentation 10S in casing shell 44 and having its inner ball race sleeved on a pivot post 106 whose bottom end is flattened and thus lodged iixedly agalnst rotation in a correspondingly fiatted socket formed by a boss 107 projecting inward of ring 20 from an arcuately curved saddle piece 108 that is welded or otherwise made fast to and bridges a gap between spaced ends of ring 20. These ring ends are further firmly locked together by an inverted saddle piece 109 having cross ribs 110 that seat in transverse notches 111 cut in tubular walls of ring 20. Pivot post 106 is maintained rigidly in the socket of boss 107 by a holding screw 112 that threads into the post and extends through both saddle pieces 108 and 109 and whose head is nested flush Within a countersunk depression in the latter. Pivot post 106 extends with clearance freely through an aperture 113 in the inner air conduit shell 46 as shownl in Fig. 9. It is provided with a jog 114 that offsets its top end laterally from axial alignment with its bottom mounted end thereby to serve operatively as anchorage for a moving part of the oscillating mechanism of the fan.

Such oscillating mechanism includes a rigid pitman link 120 that pivotally swings in a horizontal path from the reduced top odset end of post 106 and is retained thereon by a thrust washer 121. The opposite end of link 120 pivotally engages at 119 a crank arm 122 that is rotatably xed on the exposed bottom end of a vertical drive shaft 123 journaled in a bearing 125 on' the speed reduction case 124 carried by the stator of the motor within the rear end of the motor housing 60.

Clutchable to rotate in unison with shaft 123 by axial pressure of a thumb screw 127, whose clutch operating mechanism may be constructed as in U. S. Patent No. 2,341,220, there is a driven worm gear 126 in mesh with a transmission Worm 128 which rotates in unison with a transmission Worm gear 129 upon the counter shaft 130 removably fastened in the transmission case by the set screw 131. Transmission worm gear 129 is driven by a driving worm thread 132 cut on the rear end portion of motor shaft 78.

In operation the slow rotation of crank arm 122 by the motor shaft 78 through the medium of the transmission gears 132, 129, 128 and 126 will alternately push and pull on post 106 through the medium of the freely swingable link while the fan impeller 55 is generating an air stream projected away from itself in direction of the arrow F forwardly through the grid vanes S2. This will swing the entire airstream generating unit, including the fan motor and its supporting funnel shell structure, back and forth between, say, the positions thereof shown in broken lines in Fig. 5. During this oscillating performance of the fan the carrier ring 20 will remain stationary.

At any time whether or not such oscillation is taking place the carrier ring 20 may be shifted to different angles of inclination relatively to its support arms 18 and base 12, for setting it in various selected positions such as indicated in broken lines in Fig. 8. The ring will be movable to and fastened in any such position by suciently loosening and then retightening the screws 42 permitting the mating ridges and grooves on the engaging faces of trunnions 30 and hinge posts 32 temporarily to slip to effect the tilting adjustment.

Thus a fan embodying these improvements can be tilted to various positions about a diametral axis for blowing air upward or downward and in each of those various tilted positions can oscillate automatically from side to side about a diametral axis that is perpendicularly related to the axis of tilting adjustment, and coplanar therewith, and as shown these axes may intersect each other.

The support for the hinge posts 32 may comprise brackets at diametrically opposite sides of an aperture in a fan supporting panel designed to till part of a window space for room Ventilating purposes as in U. S. Patent No. 1,306,845.

The appended claims are directed to and intended to cover variations of the precise construction and relationship of parts herein disclosed in which the invention defined by the claims may be incorporated Within the teaching of this disclosure.

1. I claim:

l. An oscillating fan comprising, stationary supports spaced apart along an axis of tilting adjustment, a carrier ring spanning the space between said supports and swingably coupled thereto for tilting adjustment about said axis, an annular funnel shell encompassed by said carrier ring and so pivotally mounted thereon that the axis of said shell can be oscillated in a plane perpendicular to a plane containing said axis of tilting adjustment, an air stream generating unit including an electric fan motor having a magnetic field structure supported by said funnel shell in fixed relation thereto and an air impeller rotatable by said motor about said axis of said shell, an anchorage post rigid with said carrier ring extending therefrom to an anchorage terminal located intermediate the combined axial length of said motor field structure and said air impeller, a crank carried on and rotated by said motor, and a pitman link operatively coupling said crank to said anchorage terminal, the said funnel shell being hollow comprising a unified inner air conduit shell and an outer casing shell, and the said anchorage post extending through bo said outer shell and said inner shell. l

2. A fan as defined in claim 1, in which the said anchorage post .atiords rotary bearing for the said funnel shell.

3. A fan as defined in claim 2, in which the said anchorage post has a jog on the opposite side of the said rotary bearing from the said carrier ring laterally off' setting its said terminal engaged by the said pitman link.

4. An oscillating fan comprising, stationary supports spaced apart along an axis of tilting adjustment, a carrier ring spanning the space between said supports and swingably coupled thereto for tilting adjustment about said axis, an annular funnel shell encompassed by said carrier ring pivotally mounted thereon to swing relatively thereto about an laxis of oscillation so disposed that the axis of said shell can be oscillated in a plane perpendicular to a plane containing said axis of tilting adjustment, an air stream generating unit including an electric fan mtor having a field structure of substantially smaller compass than said funnel shell supported thereby mainly at the rear of said axis of oscillation and an air impeller rotatable by said motor about said axis of said shell located mainly in front of said axis of oscillation, an anchorage post rigid with said carrier ring extending therefrom past said funnel shell and having an anchorage terminal located radially intermediate said unit and said shell within the combined axial length of said motor field structure yand said air impeller, a crank carried on and rotated by said motor, and a pitman link operatively coupling said crank to said anchorage terminal.

5. An oscillating fan as defined in claim 4, together with a ball bearing having its inner race sleeved on the said anchorage post and having its outer race fixedly lodged in the said funnel shell.

6. An oscillating fan comprising, stationary supports spaced apart along an axis of tilting adjustment, a carrier ring spanning the space between said supports and swingably coupled thereto for tilting adjustment about said axis, an annular funnel shell encompassed by said carrier ring and so pivotally mounted thereon that the axis of said shell can be oscillated in a plane perpendicular to a plane containing said axis of tilting adjustment, an air stream generating unit including an electric fan motor having a magnetic field structure supported by said funnel shell in fixed relation thereto and an air impeller rotatable by said motor about said axis of said shell, an anchorage post rigid with said carrier ring extending therefrorn to an anchorage terminal located intermediate the combined axial length of said motor field structure and said air impeller, .a crank carried on and rotated by said motor, and a pitman link operatively coupling said crank to said anchorage terminal, together with means holding the said anchorage post in rigid relation to the said carrier ring comprising, a radially inward directed socket on the carrier ring occupied by one end of the latter and a screw fastener extending crosswise of said carrier ring having threaded engagement with said end of the anchorage post to maintain the latter rigidly in said socket.

7. An oscillating fan as defined in claim 6, together with a split clamp at least in part encompassing the said carrier ring, said clamp incorporating the said socket and being tightened against said ring by the said screw fastener,

References Cited in the file of this patent UNITED STATES PATENTS 708,622 Coleman Sept. 9, 1902 1,099,693 Diehl June 9, 1914 1,617,258 Lister et al. Feb. 8, 1927 1,650,280 Koenig Nov. 22, 1927 2,056,547 Weber Oct. 6, 1936 2,166,987 Fitzgerald July 25, 1939 2,549,523 Reisch Apr. 17, 1951 2,554,600 Sutton May 29, 1951 2,610,349 Moore Sept. 16, 1952 FOREIGN PATENTS 22,701 Great Britain of 1904 372,499 Great Britain May 12, 1932 500,782 Great Britain Feb. 15, 1939

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US3128036A (en) * 1960-10-17 1964-04-07 Le Roy C Mcbride Machine to generate and control an airstream
US3481533A (en) * 1967-04-24 1969-12-02 Calor App Electro Domestiques Directional fan
US6003242A (en) * 1998-01-09 1999-12-21 Carley; Joseph C. Portable heater
US6015262A (en) * 1997-10-21 2000-01-18 Huang; Kuo-Cheng Electric fan apparatus capable of blowing air in a desired orientation
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