US636871A - Ceiling-fan motor. - Google Patents

Description

lo. 636,87l. Patented Nov. I4, |899.

I H. H.. wAlT.

CEILING FAN MOTOR.

(Application lsd Jan. 16, 1899.) (No Model.) 2 Sheets-Sheet I.

rlallll.

Patented Nov. I4, |899.

H H WAIT CEILING FAN MOTOR.

(Application led Inn. 16, 1889.)

2 Sheets-Sheet 2,

(No lodel.)

O., wnsnmawrl o c UNITED STATES PATENT OEEICE.

HENRY H. WAIT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE VESTERN ELECTRIC COMPANY, OF SAME PLACE.

CEILINGFAN MOTOR.

SPECIFICATION forming part of Letters Patent N o. 636,871, dated November 14, 1899.

PPOMOH led January 16, 1899. Serial No. 702,269. (No model.)

- oise, and exact' description.

My invention relates to electric motors, and more particularly to the class commonly known as fan-motors, my invention being especially designed for use in connection with ceiling-fan motors, which usually run at slow speed, carrying blades having several feet sweep. Generally speaking, ceiling-fans are much more satisfactory in operation than the high-speed buzz-fans, but they are of such size that they are sometimes considered objectionable on account of the amount of space occupied. For this reason it is often desirable that they be conveniently combined with a chandelier or electric-light support.

The object of this invention is to provide means whereby a chandelier, switch, or similar device may be suspended from the motorframe without interfering in any way with the operation of the motor-shaft and, indeed,with out any connection therewith. It has been usual heretofore to journal the motor-shaft directly upon the rod or tube which forms the support for the chandelier or switch.

In accordance with my invention the frame of the motor is stationarily mounted upon the end of a tube, such as a gas-pipe, suspended in the manner of a chandelier from the oeiling. The armature-shaft is provided with a longitudinal bore extending entirely through the same and is journaled to rotate in bearings mounted upon the motor-frame. A portion of this shaft extends downward outside of the motor-frame, and it is to this projecting portion that the fan-blades are attached, extending at right angles thereto. A stationary rod or pipe passes entirely through the bore of the armature-shaft, so that the latter surrounds it like a sleeve. The rod or pipe, however, is entirely independent from the shaft, being supported at its upper end by suitable brackets on the motor-frame. The lower end of the pipe may support a switch 0r electric-light xture, the 'wires for which run through this inner stationary tube. A resistance-coil of a rheostat may be located within the motorframe, and suitable conductors may connect the resistance-coil with the switching mechanism before referred to.

It will be appreciated that with a motor constructed in accordance with my invention the armature-shaft may be provided with selfalining journals mounted upon the motorframe and it is possible t0 employ an ironclad armature with much smaller clearance between the armature and the pole-pieces than if the armature were journaled upon a central rod or tube serving the combined purpose of a bearing and a support, as has been proposed heretofore.

My invention will be described more particularly by reference to the accompanying drawings, wherein- Figure 1 is a sectional elevation of the ceiling-fan motor embodying myinvention. Fig. 2 is a similar View, the section being taken in a plane at right angles to the plane of Fig. l; and Fig. S is a plan showing the brackets, a portion of the cover being removed.

The same reference-letters are used to indicate the same parts in all the figures.

The motor-frame ct is mounted upon the lower end of a gas-pipe b, which may be suspended from a hook h in the ceiling, and an ornamental casing b2 may inclosethe pipe h, as usual. Pole-pieces a c. are formed upon the motor-frame and are enveloped by the field-coils a2 a2.

The armature c is mounted upon a hollow shaft CZ, which is jonrnaled to rotate in selfalining bearings c c, the upper bearing being supported by the bracket c', mounted upon the motor-frame, and the lower bearing being similarly supported by an extension or bracket e2 of said frame. To the lower end of the armature-shaft- CZ are attached the fanblades d d', extending at right angles thereto.

Passing through the hollow armature-shaft d, but entirely independent therefrom, is a tube or pipe j", carrying at its lower end the support g for the switch t and the electriclight fixtures 71, h', which pipe f is stationarily supported at its upper end from the brackets e'.

I have found it very convenient to mount IOO a resistance-spool within the casing of the motor, where it will be out of the way, and this may be connected by wires passing through the tube f with the switch h, thus constituting a rheostat which may be used for controlling the speed of the motor.

It will be understood that the term electrical fixture when used in the claims is to be taken in the sense of a chandelier, switch, or the like, which it might be desired to suspend from the fan-motor support.

Having thus described my invention, l claim as new7 and desire to secure by Letters Patent, the following:

l. The combination in an electric ceilingan, a magnet-frame and brackets mounted on the frame, journals formed in said brackets, an armature within the frame having a tubular shaft journaled in said bearings, and a fixture-support projecting freely through said shaft and carried in the upper bracket, substantially as described.

2. In a combined ceiling-fan and fixturesupport, a field-magnet frame and bracketse secured thereto above and below the frame, a centrally-located iiXture-support rigidly secured in said upper bracket, projecting through the lower bracket, and carrying an electric fixture beneath the frame, bearings carried in the said brackets and an armature having a tubular shaft journaled in said bearings, said shaft surroundingsaid iiXture-support but being independent thereof, substantially as described.

3. In a combined ceiling-fan and ixturesupport, afield-magnet frame and brackets secured thereto above and below the frame, a centrally-located tubular fixture-support rigidly secured in said upper bracket, projecting through the lower bracket, and carrying an electric fixture beneath the frame, and electric-circuit conductors terminating in the fixture threaded through said tubular support, bearings carried in the said brackets and an armature having a tubular shaft j ournaled in said bearings, said shaft surrounding said {iX- ture-support but being independent thereof, substantially as described.

fl. In' combination, in a ceiling-fan and fixture-support, a field-magnet 'frame and brackets secured thereto above and below the frame, bearings carried in the said brackets, an armature inclosed by the frame having a tubular shaft journaled in said bearings and projecting below the lower bearing, and fan-blades carried on the projecting end of the shaft, a central iiXture-support having one end rigidly secured in said upper bearing and having its other end projecting below the fanblades, and an electric fixture carried thereon below the blades; whereby the rigidity of the bearings is assured while the fixture-support is rendered independent thereof, as described.

5. The combination with a frame carrying field-magnets; an armature mounted on a hollow shaft, and bearings for supporting its upper and lower ends; of a fixture-supporting shaft projecting freely through the hollow armature-shaft and secured at its upper end only to the field-magnet frame, whereby the iiXture-supportin g shaft may vibrate laterally without imparting movement to the armature or its held-magnets.

ln witness whereof l hereunto subscribe my name this 21st day of December, A. D. 1898.

HENRY Il. VAIT. Witnesses:

GEORGE P. BARTON, WINFIELD W. LEACH.

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