US1490205A - Dynamo-electric machine - Google Patents

Description

Mmmm' prl l5 1924,

B. H. CHATTO DYNAMO ELECTRIC MACHNE Filed Jan. 14 1918 Patented pr. 15, 1924.

UNITED STATES PATENT OFFICE.

BYRON E. CHATTQ, or swIssvALE, PENNSYLVANIA, AssIGNoE To WEsTINGHoUsE ELECTRIC AND MANUFAcTUEINe'coMPANY, A. CORPORATION or PENNSYLVANIA.

DYNAMo-Enno'rmc MACHINE.

kApplication filed January 14, 1918. Serial No. 211,731.

To al whom t may concern:

Be it known that l, BYRON Hf CHArTo, a citizen of the United States, anda resirdent of Swissvale, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Dynamo-Electric Machines, of which the oi the machine adapted for ceiling mounttollowing is a specification.

My invention relates to dynamo-electric machines and particularly tol such machinesas are adapted for either wall, ceiling or `floor mounting.

The object of my invention is to provide a machine of the character designated that sha-ll be adapted for any type of mounting and that may be Ychanged from one type of mounting to any other type byr merely changing the method. of aembly.

ln dynamo-electric machine: constructioin it has been customary to design four-pole machines so'that they may be changed from one `type oit-mounting to another by merely (-.lianging the angular relation of the end bell on which the commutator brushes are mounted, with respect to the magnetic field trame. Also, machines of this character, having 'but two poles, have been constructed in which the brushes were mounted in such manner. as to be adjustable about the commutator cylinder, and the yend bells were movable with respect to themagneticfield frame. An objection tothis type of brush mounting is that the machine housing must bey longer than is necessary for other purposes to* allow space for the brushes to move freely between the end bell and the held-magnet frame. Also, a somewhat co1nplicated current-collecting device results therefrom. Heretofore, no two-pole machine adapted for several different types of mounting has been built in whichv the commutator brushes were permanently mounted on the end bell.

By my invention, I provide a two-p0le dynamo-electric machine' that may be used for any type of mounting and that may readily be changed to any other type of mounting without changing the relative positions of the held-magnet poles and the commutator brushes and without moving the oil cup from a vertical position o-n the under side of the bearin housing which forms a part of the end heil.

Referring to the accompanying drawings, Fig. 1 is an end elevational View oi'ra ing. Fig. 5 is a diagrammatic view of the armature connections employed in my machine.

Referring more particularly to the drawings, I have shown a bi-polar field-magnet frame l provided with a. supporting base 2 permanently connected thereto and an rarmature 3 which rotates within the magnetic field thereof. A commutator 4 and the armature 3, to which it is connected, are mounted upon a shaft 5 that is supported by bea-rings mounted in end bells 6 and 7 which are held in proper relation to the magnetic field frame lby means of bolts 8. The bearings are provided with lubricant from oil cups l() that are mounted in the bearing housings. Commutator brushes 11 are rigidly mounted in diametrically op.- posite positions on the end bell 7.

It is apparent, from the drawings, that, in the machine adapted for fioor mounting, the transverse axis of the magnetic field poles is disposed at an angle of 45y to the horizontal. It is also apparent that the commutator brushes, which are supported from the end bell 7 engage the commutator cylinder at horizontally opposite points and eoy that the oil cup is maintained in a vertical position under the bearing housing.

lVhen it is desired to change this machine from floor to ceiling mounting, as 'il lustrated in Fig. Ll, the only changes necessary in the assembly are to turn the magnetic field framek through an angle of 1800` about its own longitudinal axis andto reverse the armature connections in order to' produce a rotation in the same direction as that secured from the floor mounting. The end bell, the'permanentl mounted commutator brushes and the oi cup are not relatively movcd. The angular adjustment of the magnetic field framel with respect to the end bell, is accomplished by means of the bolts 8 which are positioned around the end bell in regular angular displacements of substantially 90 each.

When it is desired to mount a machine adapted for iioor mounting upon a vertical wall, as shown in Fig. 3, it is only necessary to reverse the magnetic lield trame, with respect to the end bells, and to turn it through an angle of 90O about its own longitudinal axis before attaching the end bells. In wall mounting, as in floor and ceiling mounting, the end bell is not moved. The two end surfaces l2 and i3 ot the field frame l are similarly machined in order that it may be reversed with respect to the end bells and thata perfect tit between the end bell and the field-magnet frame may be insured in either position.

In Fig. 5, is shown an armature in which a connect-ion la ot' V shape is provided lia-ving armature throws ot' substantially 45 and 1350, respectively, and in which the field-magnet poles and the commutator brushes are shown in their proper positions.

The described relative positions: otx the held-magnet poles and the commutator brushes and the type ot, winding used in the armature enable me to secure all otl the advantages, in a two-pole motor, with respect to positions of mounting, that are secured by the use of a four-pole motor.

lVliile l have shown one form ot my invention and described, in detail, one application of the saine, it will be obvious to those skilled in the art that it is not so limited but is susceptible of various minor changes and moditications without departing from the spirit thereof` and l desire, tlierefore, that only such limitations shall be placed thereupon as are imposed by the prior art or are specifically set forth in the appended claims.

I claim as my invention:

l. A bipolar dynamo-electric machine con'iprising a trame, pole pieces carried thereby and having the axes thereoi? extending in a direction of substantially 150 with respect to the horizontal, said 'frame and pole pieces being` constructed and arranged syuimctrically with respect to a plane inH tersecting the axis oit said machine, end bells carried b v said vframe for relative adjustment ot 900, an armature mounted in said end bells for (3o-operating with said polepieces, and a plurality of brush members carried by one of said end bells and disposed on an axis of commutation extending in a direction of substantially 450 with respect to the axes of said pole pieces, the coils of said armature having throws of substantially 45.0 and 135C to correspond to the adjusted positions of said frame and pole pieces relative to said end bells and brush members.

2. A commutator machine comprising a two-pole field magnet frame having a supporting base, the poles of said frame being on an angle of substantially 450 with respect to the plane of said base, end bells, means for securing said end bells to said frame with provision for adjustments of 90o, a rotor comprising an armature winding and a commutator member supported within said frame and end bells, connections interposed between said armature winding and said commutator member and having throws of substantially 45o and 135O wherefr by the axis of commutation is displaced sub` stantially 45, and a pair of brushes bearing on said commutator member and carried by one of said end bells at an angle of substantially 45 with respect to said poles, the held magnet frame being reversible whereby either end bell may be secured on either end of said frame.

3. A conunutator machine comprising a lield magnet traine having a supporting base, a pair of end bells, means for securing, at will, either one of said end bells on either end of said frame, a rotor comprising an armature winding and a commutator member supported within said frame and end bells, connections interposed between said armature winding and said commutator member and having throws of substantially 4:50 and 1350 whereby the axis of commutation is displaced substantially 45, and a pair of diametrically opposite brushes bearing on said commutator member and carried by one of said end bells at an angle of sub-` stantially n times 900 with respect to the plane of said base, where n may be any integer including Zero, the number andpositions of the poles of said field magnet frame. being such that interpolar neutral zones are provided in only one diametric line inclined at an angle ot substantially 450 with respect to the plane ot said base.

1n testimony whereof, I have hereunto subcribcd my name this Bist day of Dec., 191 i BYRON H. CHATTO.

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