US1780789A - Electric fan - Google Patents

Description

Nov 4, 1930. J. LANZ 1,780,789

Filed July 29, 1926 2 Sheets-Sheet l Nov. 4, 1930. J. LAYNZ 1,780,789

ELECTRIC FAN Filed July 29, 1,926 2 Sheets-Sheet 2 Patented Nov. 4, 1930 were STATES PATENT, QFF CEY;

JOHN LANZ, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

THE A. C. GILBERT COMPANY, OF HAVEN, CONNECTICUT, A CORPORATION OF MARYLAND ELECTRIC FAN Application filed. July 29, 1926. Serial No. 125,702.

This invention relates to electric fans, and more particularly to a fan of the oscillating type so constructed that when the fan is set in motion, the motor and fan oscillate about a vertical axis, so that the air blown by the fan will be directed in a wide sweep or are instead of in a single direction. In the past, when such fans have been constructed, the oscillating means is driven directly and positively from the motor shaft so that Whenever the motor shaft is in operation, the fan must oscillate, and vice versa. It very often occurs in connection with the use of such devices, that the fan guard or some part of the motor body will, during its oscillation, come in contact with some object whereby its movement will be stopped. This will in turn stop the motor, due to the direct driving con-' nection between the motor shaft-and the os cillating means, and as the current continues, the motor will be burned out. I contemplate the provision of a fan wherein the oscillating mechanism .and its connection to the motor shaft will be such that, while during normal operation of the motor, the fan will oscillate in the usual way, at the same time, if the oscillating movement is checked or stopped, the operation of the motor and fan will continue aslong as current is supplied, and, therefore, the likelihood of any damage being done to the motor is obviated.

One object of my invention, therefore, is to provide an oscillating fan of such construction that the motor and fan may operate although the oscillation of the fan is prevented. 7

Another object of my invention is to provide a frictional or slipping connection between the shaft of the fan motor and the oscillating mechanism, such that if the operation of the latter is prevented, the former Will not be affected.

A still further object of my invention is V driving disk will operate independently thereof. v l 1- i A still further object of my invention is to provide new and improved driving connections between the fan motor and the os-- cillating mechanism whereby an oscillating fan may be cheaply and economically made' The invention furtherv relates-to improve- J -ments in various features of the motor itself,

as will be more specifically pointed outhere inafter.

To these and other ends, the invention resides in the novel features and combinations of parts to be hereinafter. described and claimed. I

'In the accompanying drawings: Fig. l is a front elevational view of an oscillating fan, embodying my improvements;

Fig. 2 is a side view of the same Fig. 3 is a rear elevational view of the motor body and the oscillating mechanism;

Fig. 4: is asectionalview, on line 4.-'4 of Fig. 3; i v

Fig. 5 is a sectional view'on line 55 of Fig. 4;

Fig. 6 is a sectional View through the gear casing, taken on line 66 of Fig. 7

Fig. 7 is a top plan view of the gear casing, the cover thereof having been removed to reveal the interior mechanism; i

Fi 8 is a sectionalview on line 88 of Fig.

Fig. 9is a sectional view on line 99 of Fig; 4; i i I Fig. 10 is an underneath plan view 'ofth'e driven disk of the oscillating mechanism.

Fig. .11 is a sectional view on line 11l1 of end of the pivot screw is threaded a wing nut 15, by which the ears 11 and 12 may be clamped against the'flat sides of the lower end 16 of the standard to secure .the fan in adjusted tilted positions relatively tothe base.

The motor casing preferablyv consists of front and back end members 18 and 19, and an intermediate section 20, all of which parts 10, V held,.togetherbybolts 21, shown more espee are preferably stamped fromsheet metal and cially on Figs. 2 and 3, which pass through these three parts and also through the field core 22, so as to hold. the partsof the motor. casing and the field 'corein assembled relation. 'Thefield winding is shown at 23 and maybe of anyprefer red type. a

The end sections l8 and 19 of the motor casing, are provided-with perforations at their central portions for the passage therethrough of the motor shaft, and about these perforations extend outwardly, as shown at $25 and 26, to provide housings for bearing members 27 and28; These bearing members are held in place by inner bearing caps 29 and V I 30, secured by the screws or rivets 31 and 32,

at the interior of the casing.

Asshown more especially in Fig' .6, the

' bearing members 27 and 28 comprise'substantially spherical members flattened at th e1r-p oles, andprovided with central-perforations 33 for the passage of the ,motor 5 :=Shaft projects at both, ends 1nish the lubricant between the bearing memcasing. Upon its front end I .j fun blades42 in the usual manner. Also secured adj acent the front, end of the shaft but W1th 1n the motor casing is the'commutator 4:3,;1n contact withwhich are the v usual brushes housed in chambers covered'by the caps 44- andti shownin F ig; 1. A1 sleeve 46 surrounds the rear end of the shaft' and La-buts a bearing member 28 -to prevent 'excess longitudinal play of the shaft ,withinthe' housing;

The middle section20 of themotor is "provided at its lower end with depending ears 4:7 and a8, by which the motor casing is secured-to a bearing block 4L9, by means-of ,a bolt 50,;pa'ss'ing through an opening in the and registering openings in the ears .47 Th belifi als vp h u h a ie ifereti nzie la -rev end f a p e 1 m- [cured a driving disk- 73 provided with aucenw are secured the driving disk 73?. is positioned'a fibre washer81, through which I ythe body lof-the screw 76 passes. :lttvill be 112 seen that thespring T 9 tends to hold the driven disk 78 in tight C(DHhZLCtLWit-h the fibre washer, and likewise, the latter in tight con-V t ith hedr ns disk- 8s n misma ceived within a centralopening 52 in the bearing block, soas to secure this pin to the block and motor casing. The body of the pin, which projects from the block 4=9, is received in the bore 53 of the standard 13, and is secured for rotating or oscillating movement therein by means of a screw 5d passing 1 through the standard and entering an annular channel 55 in the pin. It will be appar ent, therefore, that with this censuses-( 1 the motor: casing "and standard -13-may be tilted aboutthe pivot 14:, and-in-ad'diti-on the 7 motor casing may be rotated relatively to the p standard 13, about a vertical axis.

f At the rear endof the motor casing is secured a gear housing by the samescrews This gear casing is provided adjacent itslowper side with a bearing bossfil, and is left open at its upper side to be covered by a remov v able cap 62.

The rear end ofthe motor shaft extends; into this gear housing andis provided with worm .threads 63 thereon, which engage .a

worm wheel 64:, secured to a sleeveshaft 65 rotatably mounted upon a stud 66, secured in'the lugs 67 and 68, formed 'integrallywith '32 which hold the bearing cap BO ,in place.

the gear housingt As shown inIig.8 ,-the

stud 66 is inserted from the exterior of the housing, through abore in the lug :68, 1and* held in placeby the screw 69, .the'nemote end of the shaft being vseat-ed in {recess in the lug 67 V The sleeve. 65 is provided acent 67 with worm ,teeth' 7O, which engage the? teeth of the-worm wheel/T1, secured to.,.the

vertical shaft 72, whichis rotatably mounted in the bearing'boss .61. The stud 66 is provided with a shoulder '13, which contacts with to urge the sleeve shaft '65 against the h1g5? so as'tomainta'in the wormfZO proper re:la Ition withthe worn-1 wheelf7l. Upon the lowerend-tof the shaft 72 is 1 etral perforation .74, threaded to, receive the the side face .of'the worm wheelfit, and tends a threaded end of the shaft 72, and also the i threaded end 7 5 of azscrew :76.""The.body of this. screw is. considerably larger than the threaded end 75, andfabuts against the lower 1,

surface of the driving disk 73 Thisiscrew is received in a counter bored recess 77, a driven crank disk 78. A. coil sp $119 mounted in the counter, bore of t'hi. reacts between the head of the screwiand recess "the lower shoulder'80 of the counterboreto urge the driven disk or cr'anlg' 78 toward Between thesetw'o disks m ,tri tienal; dri ing eenneption is. provided between these two disks which under ordinary operating conditions is sufficientlyindependently of the driven disk.

On the standard 13 is provided a projecting lug 84, to which is pivoted a link 85, pivoted in turn at its other end to the driven disk 78 by means of the screw 86, the pivot point being eccentric to the axis of rotation of this disk. It will be apparent that when the driven disk 78 rotates, the fan and the motor casing will be caused to oscillate with respect to the standard 13 and the base 10, due to the action of the link 85. However, if the fan guard or some portion of the motor body contacts with some object, so as to prevent the oscillating movement, the driven disk 78 will remain at rest without interfering with the rotation of the motor shaft and fan.

The fan blades may be protected by a wire guard 87 of any usual or preferred form.

While I have shown and described'herein a novel form of bearing and certain improvements relative to the means for mounting the parts of the motor within and by a sheet metal casing and on a base or othersupporting member, I do not claim the same herein since these improvements have been made the subject matter of my co-pending applications for an electric fan, Serial No. 248,655, filed January 23, 1928, and an electric motor, Serial No. 349,046, filed March 22, 1929.

While I have shown and described a preferred embodiment of my invention, it is to be understood that it is not to be limited to all the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

W'hat I claim is 1. In an electric fan, an electric motor, a base upon which said motor is mounted to oscillate, and means to oscillate the motor comprising a shaft rotated from the motor shaft, a disk mounted on said shaft, a screw having an enlarged head secured to the under side of said disk, a second'disk provided with 1 a counter-bored recess to receive said screw,

2. In an electric fan, an electric motor com prising a casing, a gear housing secured at one end thereof and carrying a depending bearing boss, a shaft rotatably mounted in I said boss and driven from the motor-shaft, a driving disk carried by the lower end of said shaft, and a crank disk supported by the shaft and held in frictional driving relation with said driving disk. r

3. In an electric fan, a. stationary base, an electric motor mounted for oscillatory movement on said base, a vertical rotatable shaft driven from the motor shaft, a driving disk carried on the lower end of the rotatable shaft, a disk supported by the rotatable shaft and having frictional driving relation withthe driving disk, a crank pin on the second named disk, and a link having one end received on the crank pin and the other end mounted on the stationary base.

4. In an electric fan, a stationary base, an electric motor mounted for oscillatory movement on said base, a vertical rotatable shaft driven from the motor shaft, a driving disk carried on the lower end of the rotatable shaft, a disk supported by the rotatable shaft and having frictional driving relation with the driving disk, a crank pin on the second" named disk, and .a link having one end received on the crank pin and the other end mounted on the stationary base, and means for resiliently urging the second named disk into frictional driving relation with the driving disk.

5. In an electric fan, a stationary base, an electric motor mounted for oscillatory movement on said base, a vertical rotatable shaft driven from the motor shaft, a driving disk carried on the lower end of the rotatable shaft, a disk supported by the rotatable shaft and having frictional driving relation with the driving disk, a crank pin on the second named disk, and a link having one end received on the crank pin and the other end mounted on the stationary base, and means for resiliently urging the second named disk In witness whereof, I have hereunto set my hand this 27th day of'July,

. 7 JOHN LANZ.

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