US1597751A - Fan - Google Patents

Description

Aug. 31 1926. 1,597,751

c. AAL'BORG FAN Filed August 9, 1924 2 Sheets-Sheet 1 INVENTOR U/m'sf/m lye/bag- BY ATTORNEY I Aug. 31 1926..

C. AALBQRG FAN Filed August 9, 1924. 2 Sheets-Sheet 2 i INVENTOR Chris/[m fia/fio ITNESSES:

'3' BY v TTORNEY Patented Aug. 31, 1926.

P rem" FFICE.

CHRISTIAN AALBORG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC 6: MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- VANIA.

Application filed August 9, 1924, Serial No. 731,103.

This invention relates to fans, and, more particularly, to ceiling fans of the gyratory type.

The object of the invention, generally stated, is the provision of a ceiling fan that shall be simple and eflicient in operation and readily and economically manufactured.

A more specific object of the invention is to provide for the giving to a fan a gymtory-motion as it rotates in order to diffuse the currents of air.

It is also an object of the invention to provide for the moving of a gyratory fan in different paths to control the direction in which the currents of air are delivered.

Other objects of the invention will, in part, be obvious and, in part, appear hereinafter.

This invention, accordingly, is disclosed in the embodiment thereof shown in the ac oompanying drawings and comprises the features of construction, the combination of elements and the arran ement of parts which will be exemplified in the construction hereinafter set forth and the scope ofthe application of which will be indicated in the claims.

For a fuller understanding of the objects of the invention, reference should be had to the following detailed description, taken in connection with the accompanying drawings, in which- Figure 1 is a side elevation of a fan embodying my invention;

Fig. 2 is a side elevation of the fan, parts being broken away to show the details of its construction; and

Fig. 3 is a sectional view along the line 33 of Fig. 2, showing features of construction.

Referring now to the drawing, 10 designates generally a fan motor of any well known type adapted for utilization in fan construction. As shown, the motor is pror vided with an armature shaft 17 that extends beyond the casing to present an end for thereception of a fan wheel 18. In mounting the fan wheel on the shaft 17, any suitable means, such for example, as a set screw, may be utilized to fix it in position.

Aswill be observed, the fan motor 10 is suspended from an overhead support by means' of a hanger 12 and a universal-joint connection or mounting, both of which will now be described.

In order to facilitate the mounting of the fan, the hanger 12 is made in sections. Accordingly, a hook 18, adapted to engage an overhead support, and a tubular member 15,;

constructed to receive the universal-joint connection, are provided. It willbe noted that a coupling 11 is disposed on the upper end of'the tubular member 15 so that the latter may be suspended from the hook at will. v

Since, in mounting fans, it is desirableto give the whole structure a pleasing appearance, a canopy 16 isprovided' to'enclose the hook and coupling. canopy and the tubular member constitute a conduit through which a conductor cord may be led to the motor. In this particular constructiomthe tubular member is provided with an opening near its lower end through which the conductor cord 43 extends.

The universal-joint mounting already referred to is provided to suspend the motor from the hanger in such manner that the motor shaft may be oscillated indifferent planes to give the fan wheel a gyratory movement.

As will be observed, the universal join includes a yoke 19 and a ring 22 pivotally mounted between the arms of the yoke. In order to suspend the members 19 and 22 from the hanger, a collar 20, adapted to receive the lower threaded end of the tubular member 15, is formed integral with, and centrally disposed on, the yoke. It will be apparent that the collar may be fixed in any desired position on the tubular member by a set screw 21 Or similar device.

The mounting of the ring 22 may be accomplished in various ways. In this particular construction, set screws 23, having ends 2 1 without threads, are mounted in the arms of the yoke and disposed so that the ends project into bearing recesses formed in As is apparent, the,

cillates. In mounting the motor, set screws 25, having pins formed integral therewith, are disposed in the ring so that the pins engagein bearings formed in the motor casing. Set screws, such as 23 and 25, facilitate the assembly of the fan but they may be displaced by the continuous operation of the fan. Accordingly, it is advisable to provide some means for locking them in position, such as set screws 25 WVhen the fan is adapted for suspension from an overhead support, in order to give the motor shaft an oscillatory movement in different planes, to effect agyratory move-' ment of the fan wheel, a rotatably mounted arm 27 is provided to retain the shaft inclined to a vertical'line extending through the intersection of the axes'of the universal-j oint mounting.

The arm 27 is rotatably mounted on a short shaft 26 suspended from the yoke 19 with its axis coincident with a vertical linemeeting axes of the universal-joint members at their intersections. In order to suspend the shaft 26 from the yoke, an opening is drilled through the latter in alignment with the collar 20, and of smaller diameter, thus forming a shoulder inside, and at the base of, the collar. i

As shown in Fig. 2, the shaft 26 is provided with a head small enough to fit into the collar, but larger than the opening through the yoke. Therefore, when 'the' shaft 26 is projected through the opening in the yoke, the head of the shaft seats on the shoulder formed at the base of the collar 20.

The arm. 27 is provided with a hub 28,

I large enough to fit loosely on the shaft 26.

In order to retain the hub in'position on the shaft, the latter has a circumferential groove 29 formed therein for the reception of an end 30 of a set screw 31 mounted in a threaded opening provided in the hub 28.

In order to effect oscillation of the armature shaft in different planes, a mechanism actuated by the motor is provided. As

shown in Fig. 2, this mechanism includes a casing 33, provided with a tubular portion 34 so disposed on the motor casing so that it extends in the latter to constitute a bearing for the armature shaft 17.

A stub shaft 35 is rotatably mounted in a bearing provided in the outer end of the casing 33 and located in alignment with the shaft 17. It will be noted that the shaft 35 has an opening formed in its inner end for the reception of one end ofa worm 36,

which is directly connected to the armature shaft.

The connection between the worm and the armatureshaft may be effected in any suitable manner but,asshown, one member is provided with a tongue and the other with,

a slot shaped to receive. the tongue. As will be observed, the worm'is retained centrally the motor brushes. ductors 13, connected of supply, are led into the motor casing as positioned in the shaft opening by means of a bearing formed on its outer end and adapted to fit in a bearing provided in the shaft.

As shown in Fig. 3, the worm 36 meshes with a worm wheel 37, fixed to a shaft 38,

'rotatably mounted in a bearing formed in a block 39, carried by the stub shaft 35. The

block 39 may be attached to the stub shaft 35 in any suitable manner.

38, a pinion 41 is attached to its outer end. It will be observed that this pinion is provided with helical teeth adapted to mesh with a ring gear 42, carried by the casing 33, as shown in Fig. 2. The ring gear 42 is provided with helical teeth for the reception of the teeth of the pinion 41. Thus, a train of gears is provided connecting the armature shaft 17 to the stub shaft 35, and the gears may be proportioned to give any desired reduction in speed.

- The outer end of the stub shaft 35 is bifurcated to receive any one of a plurality of pins 32 carried by the arm 27 to prevent rotation of the shaft. By reason of the provision of a plurality of pins 32 the motor shaft may be inclined at the axis of the shaft 26.

Since the motor casing does not rotate, the conductors 43 may be connected directly to Consequently the conto any suitable source different angles to shown in Fig. 2. However, to prevent annoyance fro-m the swinging of the conductor cord as the motor oscillates, they may be be connected to one side of the yoke 19. Free movement of the motor, is permitted by winding the conductor cord in the form of a spiral 4E5.

In operation, when the motor circuit is closed, the motor is energized and the arma ture shaft 17 rotated. This effects the operation of the screw 36, worm wheel 37, shaft 38 and pinion 4-1, which is in mesh with the ring gear 42. Accordingly, the pinion 41 travels around the ring gear 42 and, since the motor cannot rotate about the axis of the shaft 26, the stub' shaft 35 is urged to rotate. Rotation of the stub shaft 35 is impossible because of its connection to the arm 27. It would seem, from the above, that the motor would be brought to a stop, since, apparently, through the train of gears, the shaft 17 is held against rotation. However,

the arm '27 is rotatably mounted, and when shaft26; This permits the rotation of the stub shaft 35 in the casing 33. As the arm 27 rot-ates, it oscillates the armature shaft 17 in difierent planes, thereby giving the fan wheel 18 a gyratory motion.

When it is desired to change the gyratory path of the fan wheel 18, the inclination of the shaft 17 to the axis of the shaft 26 is varied by effecting engagement of the slot in the end of stub shaft 35 with another pin 32 of the arm 27. In this manner, the air currents may be diffused, as desired.

I would state, in conclusion, that, while the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the exact details herein illustrated, since modifications of the same can be considerably varied without departing from the spirit of the invention as defined in the appended claims.

I claim as my invention:

1. A gyratory fan comprising, in combination, a, fan motor provided with a drive shaft, a plurality of fan blades carried by the drive shaft, a hanger to carry the fan motor, a universal-joint connection adapted to suspend the motor from the the hanger, an arm rotatably mounted on the hanger, an auxiliary shaft rotatably mounted in the motor, said auxiliary shaft being connected to the rotatable arm to incline the drive shaft to the axis of the hanger, said connection serving to prevent the rotation of the auxiliary shaft about its own axis and a driving connection between said shafts whereby the auxiliary shaft is rotated in the motor and the arm about the axis of the hanger.

2. A fan comprising in combination, a fan motor provided with a drive shaft, a fan wheel carried by the shaft, a hanger to carry said motor, a universal-joint connection adapted to suspend the motor from the hanger, an arm rotatably mounted on the hanger, an auxiliary shaft rotatably mounted in the motor, said auxiliary shaft being connected to the arm to incline the motor shaft at an angle to the axis of rotation of the arm and operatively connected to the main shaft, whereby said auxiliary shaft is caused to rotate in the motor and to swing about the axis of said arm when the fan motor is in operation, thereby to give the fan blades a gyratory movement.

A fan comprising, in combination, a fan motor provided with a drive shaft, a plurality of fan blades carried by the shaft, a hanger to carry said motor, a universal-joint connection adapted to suspend the motor from the hanger, an arm rotatably mounted 011 the hanger, an auxiliary shaft rotatably disposed in the motor and adjustably connected to the arm, said connection being adapted to prevent the rotation of the auxiliary shaft relative to the arm, and means operable by the motor to rotate the auxiliary shaft relative to the motor, thereby to effect rotation of the arm and movement of the motor shaft in different planes.

4.. In a gyratory fan, in combination, a fan motor disposed in a universal mounting, said motor being provided with an armature shaft, a fan wheel attached to one end of the armature shaft, an auxiliary shaft rotatably disposed in alinement with the armature shaft, motor-actuated means tending to rotate the auxiliary shaft, and a rotatably mounted arm adapted to prevent the rotation of the auxiliary shaft, thereby to effect the rotation of the arm to move the armature shaft in different planes.

5. In a gyratory fan, in combination, a fan motor disposed in a universal mounting, said motor being provided with an armature shaft, a fan wheel attached to one end. of the armature shaft, an auxiliary shaft rotatably disposed in alinement with the armature shaft, motor-actuated means tending to rotate the auxiliary shaft, and a rotatably mounted arm adapted toprevent the rotation of the auxiliary shaft, thereby to effect the rotation of the arm to cause the armature shaft to gyrate in different planes, said arm being adjustably connected to the auxiliary shaft to permit the variation of the amplitude of gyration of the armature shaft.

In testimony whereof, I have hereunto subscribed my name this 2nd day of August,

CHRISTIAN AALBORG.

Images