US1164674A - Crank-shaft mounting for internal-combustion engines. - Google Patents

Description

T. J. STURTEVANT.

CRANK SHAFT MOUNTING FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. 5, 1914.

LIMWM. Patented Dec. 21; 1915.

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THOMAS JOSEPH STURTEVANT, 0F 'WELLESLEY, MASSACHUSETTS, AS$IGNOR T0 STURTEVANT MILL COMPANY, A CORPORATION OF MAINE.

Specification of Letters Patent.

Patented Dec. 21,1915.

Application filed September 5, 1914. Serial No. 860,403.

To all whom it may concern.

Be it known that 1, THOMAS J. Srnn'rnvnxr, a citizen of the United States, residing at VVellesley, in the county of Norfolk and State of Massachusetts, have invented or discovered certain new and useful. Improvements in Crank-Shaft Mountings for Internal-Combustion Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention. relates to multiple-cylinder internal combustion engines, and is more particularly intended for use in connection with marine engines, such, for example, as those of the well-known MurraycTregurtha type, but may of course be used in connection with other styles of engines.

The invention has for its object to provide suitable mountings, for the crank-shaft, the parts of which mountings are of such construction as to present an open front, so that the crank-shaft may be conveniently mounted in place and will be readily accessible.

To this end the invention comprises a suitable number of crank-shaft sup )orts which are open at one side, these cran -shaft supports being rigidly connected together at their bottom portions by longitudinal bars, preferably formed as angle bars, and being bolted at their upper parts to the water box of the engine, or an equivalent part, which will serve as a longitudinal beam affording rigid connections between the crank-shaft supports at their upper ends, all as will be hereinafter more fully set forth.

In the accompanying drawing Figure l is an elevation showing a portion of an internal combustion engine embodying the present invention. Fig. 2 is a vertical section of the same, and Fig. 3 is a horizontal section of one of the crank-shaft supports on line 33, Fig. 1.

Referring to the drawing, 12 denotes the crank shaft supports which are in the form of brackets open at one side and having horizontal tops 13 to which the cylinder-carrying water box 1%, or other suitable part forming a rigid longitudinal connecting beam, is secur-ed by suitable bolts 15. These open-sided crank-shaft supports or brackets may be made by casting or drop-forging or built up frame constructions. The brackets 12 are provided at their lower parts with flat vertical face portions 16 to which are bolted longitudinal bars rigidly connecting the brackets together at their lower parts, these longitudinal bars being preferablyin the form of angle beams 17 which really form the base of the engine frame, in that they are adapted to rest on or be secured to any suitable support.

Each of the brackets 12 is preferably formed with a thickened portion or lug 18 tapped for the reception of a screw 19 the lower end of which engages a removable cap 20 forming part of the crank-shaft bearing, the other part of which is afforded by a concave seat portion 21 with which the said cap 20 registers. Each cap 20 is preferably provided with an oil duct 22 which will, in practice, communicate with a suitable oil pipe or oil cup.

Extending throughout the length of the engine is an oil-holding base pan 23 which will preferably be mounted in place by being attached to the lower edges of the angle beams 17.- The space between the angle beams 17 and the upper longitudinal beam, herein shown as being in the form of the water box 14:, will preferably be inclosed by removable side covers 24- mounted in place in any suitable manner. These covers are shown in Fig. 2, but are omitted from Fig. 1.

From the foregoing it will be understood that the invention provides open-sided crank-shaft supports which will permit the engine crank-shaft to be conveniently mounted in place, and which will permit of ready access thereto whenever this may be necessary or desirable. Owing to the fact that the crank-shaft supports or brackets are rigidly joined together at their lower parts by longitudinal bars or angle beams 17 and at their upper parts by a longitudinal beam afiorded by the water box 14, or any suitable equivalent construction, it will be understood that the invention provides a structure which will be very rigid, so that the bearings of the crank shaft cannot get out of alinement, but

which is at the same time comparatively light in proportion to the great strength afforded. If it be desirable to lighten the construction of the crank shaft supports or brackets, where great strength will not be necessary, these brackets may be made wholly or partly of skeleton form by providing the same with openings 25, as indicated by dotted lines in Fig. 2. Also the invention provides a construction which affords a base of suitable strength and rigidity, but which will not require heavy foundation parts, so that the engine structure will be sufficiently rigid and strong without being unduly ponderous.

Having thus described my invention 1 claim and desire to secure by Letters Patent:

1. A crank shaft support, for an internal combustion engine, consisting of a bracket open at one side and having a horizontal. top portion, and flat vertical side portions or facings at its lower part, and having also a seat to afford a crank shaft bearing.

2. A crank shaft support, for-an internal combustion engine, consisting of a bracket open at one side and having a horizontal top or ion an a" ver ica sice )or ions r12 t dfl t t l l t 0 1c ings at its lower part, and having also a seat to afford a crank shaft bearlng, combined with a cap registering with said seat,

and meansfor holding said cap in place.

3. A crank shaft support, for an internal combustion engine, consisting of a bracket open at one side and having a horizontal top portion, and flat vertical side portions or facings at its lower part, and having also a seat to afford a crank shaft bearing, combined with a capregistering with said seat, and means for holding said cap in place, said means comprising a set screw engaging said can and threaded into a portion of said bracket. v

4:. In a multiple-cylinder internal combustion engine, a series of open-sided brackets provided with seats to afford crank shaft bearings, combined with longitudinal beams formed separate from said brackets but attached thereto and rigidly connecting said brackets together at their lower arts, and a rigid .longitudinal beam formed separate from said brackets but attached thereto so as to connect said brackets rigidly together at their upper parts.

In a multiple-cylinder internal combustion engine, a series of open-sided brackets provided with seats to. aiford crank shaft bearings, combinedwith longitudinal anglebars for-med separate from but rigidly con necting said brackets together at their lower parts, and a llglCl longitudinal part formed separate from but serving as a beam to connect said brackets rigidly together at their upper parts.

6. In a multiple-cylinder internal combustion engine, a series of open-sided brackets provided with seats to afford crank shaft bearings, combined with longitudinal beams formed separate from but rigidly connecting said brackets together at their lower parts, and a rigid longitudinal part formed separate from but serving to connect said brackets rigidly together at their upper parts, each of said brackets being provided with a cap registering with its crank-shaft seat, and with. means for remorably securing said cap in place.

7. In a multiple-cylinder internal combustion engine, a series of open-sided brackets provided with seats to afford crank shaft bearings, combined with longitudinal anglebars formed separate from but rigidly connecting said brackets together at their lower iarts, and a rigid longitudinal part formed separate from but serving to connect said brackets rigidly together at their upper parts, each of said brackets being provided with. a cap registering with its crank-shaft seat, and with means for removably securing said cap in place.

8. In a multiple-cylinder internal combustion engine, a series of open-sided brackets provided with seats to afford crank shaft bearings, combined with longitudinal anglebars connecting said brackets rigidly together at their lower parts, a rigid longitudinal part serving as a beam to connect said brackets rigidly together at their upper parts, a longitudinal oilholding pan attached to said angle-beams, and. removable side covers between said angle-bars and upper longitudinal connecting nart, to house in the crank-shaft.

In testimony whereof I aliix my signature, in presence of two witnesses.

THOMAS JOSEPH STUR'PEVAN'J.

Witnesses lIELEN F. rIrooINs, Inn Harmon.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

- Washington, D. G.

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