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| Light weight machine with rotor employing permanent magnets and consequence poles |
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| Support for a cooling fan |
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| Acoustic isolator for a disc drive assembly |
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| Encoder with a housing, which can be assembled |
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| Direct drive motor system |
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| Permanent magnet structure for use in electric machinery |
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| High torque DC electric motor with simultaneous battery charging system |
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| Alternator |
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Ceiling fan
| Details |
Inventors: Markwardt, Michael A.;
Assignee: Encon Industries, Inc. (Fort Worth, TX)
Primary Examiner: Powell, Jr.; Everette A.
Assistant Examiner:
Attorney, Agent or Firm: Laney, Dougherty, Hessin & Beavers
A spinner-type electrical ceiling fan having a three part housing which includes a top plate, a central annular band and a bottom plate. The top and bottom plates are secured to, and movable with, the central annular band, and a plurality of blades are secured to, and project horizontally outwardly from, the bottom plate. |
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DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION The fan of the invention includes a canopy 10 by which the fan is mounted in a flush position against the ceiling.
The canopy 10 receives and houses the electrical conductors which extend from this enclosure downwardly through a down rod 12.
Generally, the canopy 10, which is slidable along the down rod 12, will be moved upwardly into position around an outlet box and mounting bracket by which the fan is suspended from the ceiling after the outlet box has been fastened to the ceiling with the electrical wires extending therethrough and through the down rod.
A large, three-part housing, designated generally by reference numeral 14, is rotatably mounted on the lower end of the down rod 12 and can rotate on this rod by reason of a pair of bearing assemblies 16 and 18 shown in FIG.
5.
The three part housing 14 includes a centrally apertured top plate 20 which is in the form of a round disc having a raised, bearing receiving hub 20a in the center thereof.
The three part housing further includes an annular side band 22 which extends around and encloses a soft iron armature 24.
The top plate 20 is secured by suitable screws 21 to the top of the armature 24.
Finally, a bottom plate 26 is, like the top plate 20, secured by suitable screws 28 to the soft iron armature 24 so as to complete the closure of the three part housing.
As shown in FIG.
3, the bottom plate 26 has a plurality of radially extending slots or openings 30 formed therethrough.
In the illustrated embodiment of the invention, four blade holder brackets, designated generally by reference numeral 32, are utilized for securing four paddle-type blades 34 to the lower side of the three part housing or, stated differently, to the bottom plate 26.
Each of the blade holder brackets 32 includes a pretzel shaped, blade engaging portion 32a, and a bottom plate engaging portion 32b.
The orientation and configuration of the blade holder brackets 32 is such that the blades are disposed substantially in a common horizontal plane, and are pitched upon an angulation as best illustrated in FIG
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