US596280A - Foundation for g en erator-fram es - Google Patents

Description

(No Model.)l

S. H. SHORT. FOUNDATION FOR GENERATORTRAMBS. No. 596,280. Patented Deo. 28,1897.

STATES SIDNEY H. SHORT, OF OLEVELAND,.OIIIO.

FOUNDATION FOR GEN ERATOR=FRAM ES.

SPECIFICATION forming part of Letters Patent No. 596,280, dated December 28, 1 897.

Application filed March 13, 1897. Serial No. 627,417. (No model.)

To all whom it may concern.;

Beit known that I, SIDNEY H. SHORT, a citizen of theUnited States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful mprovemen ts in Foundations for Generator- Frames and Means for Adjusting the Frames Thereon; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is for an improved foundation for generator-frames as well as for the means for adjusting the frame on the foundation.

Electric generators are commonly made self-contained by means of having their armature-shafts carried in bearings supported by the frame itself. ln such construction a very accurate adjustment of the frame on its foundations is not necessary. In large slow-speed generators, however, the armatu reis mounted directly on the engine-shaft, which shaft does not have any bearing in the generator-frame, and .therefore there is nothing to preserve the relative positions of the field-magnets and armature. The generator-frame in the construction referred to has been supported upon a masonry foundation. Itis, however, essential that means be provided for nicely adj usting the generator-frame and for changing its position from time to time to compensate for the lowering of the shaft as its bearings wear, whereby the proper presentation of the polefaces to the armature may be established and maintained. My invention provides simple and efficient means for doing this.

The invention will be readily understood from the description following. It consists of the combinations of parts there specified,

and denitely enumerated in the claim.

In the drawings, Figure l is a sectional elevation of a generator-frame and supportingfoundation made in accordance with my invention and illustrating the saine. Fig. 2 is a plan of that part of the foundation which supports one side of the frame. Fig. 3 is a transverse section of said part, being a vertical section on the line 3 3 of Fig. l. Fig. 4 is a side view of one of the frame-feet and the means for supporting and adjusting it,

and Fig. 5 is a sectional end view ofthe parts shown in Fig. 4. y

Referring to the parts by letters, A represents the foundation, made of brick or stone secured together by mortar or cement. This foundation is usually a portion of the masonry forming the foundation for the engine-bed and outboard-bearing. It isbuilt, as shown, with outside piers or walls a a, leaving between them a pit B, into which the generatorframe O and the engine fly-wheelmay depend. 'lhe tops a a' of the piers are rendered approximately level and are covered each with a layer of cement a2 a2. Any desired cement may be used. Ordinary hydraulic cement or melted sulfur is good, though I prefer to use a mixture of iron-filings, water, and salammoniac. The cement while soft runs intothe rough surfaces on the tops of the piers and thus secures a firm hold thereto.

In the form shown in Figs. l, 2, and 3 plates D D, having on their under'surfaces notches or corrugations d d, are at once placed on the cement, and the latter passing up into the notches secures the plates against lateral displacement. Foundation-bolts E, `which were placed in the foundation when it was built, project upward from the tops of the piers and pass throughholes in the plates D. Nuts e are screwed onto these bolts, and

lthus the plates are securely locked to the foundation. Each plate D is planed off smooth on its upper surface d', and it has the' upwardly-extending end flange d2,th1'oughwhich passes the adjusting-screw F, provided, preferably, with a jam-nut f and the side iiange's d3 cl3. On the top surface of the plate D, between the iianges, are a number of thin sheets or shims of iron G.

The frame C of the generator has feet o c projecting on either side of the magnet-ring, which rest on the top of the shims G. The frame is now adjusted so that its pole-faces are all the same distance from the center of the armature-shaft, which is likewise the main shaft of the engine. This adjustment IOO ward which the frame is to come is first loosened and then the other turned in the required amount. The first screw is then tightened. Bolts II, passing through slots c' in the feet c and through holes or slots in the shirns G into the plates D, are then turned tightly into place, and the generator-frame is thus rigidly held to the foundation.

Generators with frames of very large diameter sometimes tend to sag from their own weight. I have therefore provided a jackscrew J, having its base K resting upon the floor of the pit l5. The upper end of the jackscrew enters into a socket L, provided in the generator-frame C,and by adjusting the screw J the frame may be supported and prevented from sagging. A jam-nutty' is preferably provided to securely lock the screw J in place. This jack-screw further serves the purpose of raising the generator-f rame when it is necessary to insert or remove the shilns G.

In Figs. 4 and 5 is shown a modification whereby the generator-frame may be moved along parallel with the ar1nai'.ure-shaft. The

plates M are secured upon the foundationpiers parallel with the armature-shaft, preferably in the manner already described with reference to the plates D. On its upper surface are the V-shaped ways fm. The plates D' have corresponding grooves d4 in their lower faces, which fit over said ways. rlhe plate D may therefore be moved longitudinally of the shaft any distance, depending on the length of the ways m. A bolt N may pass through a slot d5 in plate D and screw intoa hole in plate M when the generator-frame has reached the proper position relative to the armature.

Having described my invention, I claim- A foundation provided with a suitable pit,

`suitable tops placed upon opposite sides of the foundation, the plates or castings D provided with suitable notches or recesses in their under sides and the flanges at their top edges,and the adj usting-screw to pass through one of said flanges, combined with the generator-frame, thin sheets of iron placed between the frame and the plates D, and the foundation-bolts which are passed through the generator-frame, the plates and the foune dation-wall, whereby the parts are secured rigidly in position, substantially as described. In testimony whereof I afhx my signature in presence of two witnesses.

SIDNEY Irl. SHORT. Witnesses:

E. L. THURsToN, ALBERT II. BATES.

Images