US996536A - Lubricated bearing. - Google Patents

Description

. WITNESSES P. S. SWAN. LUBRIOATED BEARING. 1 APPLICATION FILED JUNE 14 1910v INVENT'OR @115 Q /n: 17m

ATTORNEYS,

Patented June 27, 1911.

L To all'whom'lt may concern:

PETER SMITH SWAN, OF CALGUTTA, INDIA.

. LUBRICATED BEARING.-

Specifieation'of Letters Yatnt; Patentefl June 2'? 1911 "Application tiled June 14, 1910. Serial No. 566,809.

of "the motor are above the fan, leakage of lubricant upon the commutator and'armature, also upon the fan blades, and its dissemination thereby is objectionable. To overcome this it has been proposed to suput with such adevice the slightest error in centering between armature and field mag-' nets has resulted in the setting up of severe strains upon the overhung bearing owing to the want of balance in the torque. upon the armature.

The invention has for its object to provide a simple form of bearing obviating the disadvantages and possessing the advantages of both the systems just referred to.

In an electric ceiling fan made according to the invention, there is provided a stationary (preferably hollow) central spindle secured to the motor casing and serving as a hearing for'a rotatory sleeve mounted upon it' and carrying the motor armature, the commutator, and the fan spider. Lubricant flows upward between spindle and sleeve to a receptacle at the topof the sleeve from which when the spindle is hollow it finds its way through apertures in the spindle to the interior thereof, and on reaching the lower 'end of the spindle it passes back again through conveniently placed aperthres to 40 the lower lubricant receptacle. Or; where the spindle is solid, the upper receptacle may be commensurate in size with the lower receptacle so as to retain all the lubricant pumped up during the running of the mor tor, the lubricant finding its way back be tween the spindle and sleeve to the lower receptacle w 1811 the motor is stopped.

On the accompanying sheet of explanatory drawings there is shown in verticel section an electric ceiling fan pr0v1ded with anexample of the improved bearing.

As shown in the drawing there is provided a stationary hollow central spindle A secured to the motor casing B at its upper end by a pin C passed through apertures in the casing and alsoin the spindle, and it ort fan and armatureentirely .from below,

plug D closing the upper end of the spindle.

The spindle A serves as a bearing for a ro-- tatory sleeve E mounted upon it, end-thrust ball bearings G being interposed between the lower endof sleeve and lock nuts H on the spindle by means of which nuts the sleeve is adjustable endwise on the spindle.

The sleeve' E carries a fan spider J also themotor armature K (indicated by dotted lines) and commutator L contacting with the usual brushes M carried in the motor casing B, with which the poles T are integral, an aperture at the lower end of the easing thus formed in one piece permitting of the sleeve E withthe armature K on it being passed up on to the spindle A.

Helical'grooves U are cut 'in the interior of the slee e E, or it may be on the exterior of the stationary spindle A, so that lubricant flows from a receptacle P beneath upward between spindle and sleeve when the motor is running. When the lubricant reaches the top of the sleeve E it passes into an annular chainber Q, formed in .lhe interiorof the sleeve from which chamber it is delivered" through apertures R in the spindle A to the intrior thereof, from whence it finds its way back again through apertures S to the lower lubricant receptacle P. The lubricantreceptacle P is of cup-form having an inturned lip'. It is screwed on to the lower end of the stationary spindle A.

What I claim is p 1. A stationary vertical spindle suspended at its upper end, a rotor supported by and having said spindle as its axis, a closed oil chamber surrounding the upper portion of said spindle and a stationary oil chamber mounted on said spindle' and surrounding the lower end of, the rotor bearing on said spindle, a spiral passage between the rotor and said spindle connecting the said oil chambers and arranged to feed said upper chamber from the lower chamber during loo connecting said upper and lower chambers with the hollow interior. or said spindle whereby a passage from the upper to the v lower chamber is alt'orded through which the oil may return to the lower chamber by gravity while the rotor is in motiom 3. A stationary vertical hollow spindle, a

'1 rotori supported thereby and having the samegits its axis, upper and lower oil chainbers surrounding said spindle and communicating with each other by gravity through {said hollow spindle while the rotor is in motion, in combination with a spiral. pas

sage between sald rotor and spindle arlower chamber when the rotor is in motion,

ranged to feed the oil to the upper from the said lower oil chamber being stationary dur- Jing'the actuation of the rotor.

4. A vertical spindle, a sleeve thereon, said spindle and sleeve being rotatable with relation to each other, a closed oil chamber surrounding the upper end of the bearing between said sleeve and spindle, an oil chamber carried by said; spindle and sur' rounding the lower end of said bearing, a spiral passage between said sleeve and spin- (ile arran 'ed to feed the oil to the upper from the lower chamber during the rotation of said sleeve and spindle with relation to each vother, together with areturn passage through said spindle affording communication by gravity from the upper to the'lower oil chamber during said rotation, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribin witnesses.

' ETER SMITH SWAN.

Witnesses a JOHN B. CLARK, Roar. B. SALL.

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