US786983A - Engine. - Google Patents

Description

PATBNTED APR. 11.1905. o. R. MGGAHBY.. 'v

ENGINE.

APPLIOATION FILED MAY 1e, 1904.

[NWI/WOR Patented April 11, 1905.

PATENT OFFICE.

OALVERT R. M CGAHEY, OF COVINGTON, VIRGINIA.

ENGINE.

SPECIFICATION forming part of Letters Patent No. 786,983, dated April 11, 1905.

Application filed May v16, 1904. Serial No. 208,278.

To all whom it may concern:

Be it known that I, OALVERT R. MCGAHEY, a citizen of the United States, residing at Covington, in the county of Alleghany,'State of Virginia, have invented certain new and useful Improvements in Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an engine, and particularly to a frame or inclosing casing for the movable parts thereof.

The invention has for an'object to provide an improved construction of removable guide for the cross-head whereby access may be had thereto and to the pitman connection on the crank-shaft, so that these parts may be readily disconnected and removed when necessary for repair or adjustment.

A further object of the invention is to provide an improved connection between the piston-rod and the cross-head by which these parts may be' readily separated for the purpose of removal and also to provide an *auto-V matic oil-feed from the chamberl beneaththe crank-shaft to the guide and ways for the cross-head.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings, Figure 1 is a longitudinal section; Fig. 2, a top plan view; Fig. 3, ade-l tail perspective of one end of the casing; Fig. 4, a vertical cross-section on the line 4 4 through the guideways, and Fig. 5 a perspective of the cross-head.

Like letters of reference refer to like parts in the several figures of the drawings.

The letter A designates the inclosing casing for the movable parts of the engine, which may be mounted in any desired manner-for instance, upon a base A-and is provided at one end with an enlarged chamber A2, through which the crank-shaft A3, carrying the usual iiywheel A4, passes. This chamber at its lower portion is provided with a drain-pipe and cock A? for the purpose of removing oil therefrom, while at one side thereof a removable head A is provided and a similar cap A7 at the end of the portion A2. By the removal of the headA6 access may be had to the connection between the pitman B and the crank-J disk B,carried by the shaft A3, asshown at B2, the opposite end ofthis pitman being connected by a cross-pin B3 with the cross-head B4. This cross-head is of hollow construction, so that thev end of the pitman B extends intoithe same, and is provided with side apertures B5, through which the pin B3 passes, and the opposite faces B6 of the head are suitably curved and finished to travel upon the slide or guide Ways C and C' above and below the cross-head, respectively, as shown in Fig. 1. The closed end of the cross-head B* is provided with a hook B7 thereon, having a slot Bstherein adapted to embrace the pistonrod D, which is provided at its free end with a head D to fit behind the hook and is secured in its connection by a lock-nut D2, adjustably mounted upon the pistonrod. The piston-rod at its opposite end is provided with the usual piston D3, disposed within a cylinder D4. At each end of this cylinder valves D5 and D6 are provided, the former of which communicates with a steam-inlet passage or chamber D7 and the latter with an exhaust passage or chamber D3, suitable means being provided to operate these valves in the usual manner when the engine is running. The piston-rod D is supported adjacent to the cross-head in a suitable bearing-plate DJ and passes through an ordinary packing .Dw'before entering the cylinder, these parts being disposed so as to provide an apertured chamber O2 between the same. l

For the purpose of obtaining access to the cross-head and piston-rod the slideway C is formedas a removable part in the body A of the engine, and the. under face O3 thereof is provided with a suitable guide to engage the head, a similar portion being provided upon the lower way O', while at the opposite sides of the way C fianges O4 are provided to rest upon the bodyvA of the engine-casing, and-in order to secure this party rigidly in position nuts and bolts O7 may be applied, as shown in Figs. 2 and 4. This slideway is provided with an oil-channel C, extending longitudinally thereof, from which feed-openings C7 extend downward to the face O3 of the slide.

IOO

Beyond the slideway an extension G9 is provided, having an oil-opening therein communicating with the opening CG. This extension is disposed at the crank-shaft end of the engine and adjacent to said shaft, at which point it communicates with' an oil tray or Hange E, extending about the opening in the upper portion above the crank-shaft, so that in the rotation of said shaft the oil is carried upward, as indicated by arrows in Fig. 1, and thrown into said tray, from which it drains through the oil-passages to the cross-head, thus automatically lubricating that part. For the purpose of covering the oil tray and opening above the crank and pitman connection a cover E is provided and adapted to rest upon the top of the easing, as shown in Figs. 1 and 3. The lower slideway C is provided at one end with an oil-recess E2 and at the 4opposite end with a similar recess E3, while intermediate thereof a recess Et is provided, thus carrying a body of oil adjacent to the lower slideway, from which a feed may be maintained in the reciprocation of the cross-head.

In the operation of the invention it will be seen that the crank-disk carried by the crankshaft will in its rotation carry upward a body of oil, which, as indicated by the arrows in Fig. l, will be caught by the groove above the pitman and fed therefrom through the top guide of the cross-head, so as to produce an automatic and thorough lubrication of this part, which is essential to a smooth and economical operation of the engine, and the movement of this disk also throws the oil from the reservoir beneath the crank-shaft onto the lower portions of the guides, so that the re- -cesses therein will be filled and maintain a proper supply of oil for the lubrication of these parts. Further, the removable top guide for the cross-head permits ready access thereto, and the means for attaching the cross-head to the piston-rod allows the same to be quickly disconnected from the rod and withdrawn from the engine-casing for the purpose of adjustment or repair without the necessity of changing the position of the piston and rod, as by loosening the nut upon the piston-rod. The cross-head and parts can be elevated from the casing, when the top guide is removed and the pitman readily disconnected from the head, if it be desired.

It will be obvious that changes may be made in the details of construction and configuration without departing from the spirit of the invention as defined by the appended claims. Having described my invention and set forth its merits, whatIclaim,and desire to secure by Letters Patent, is-

1. An engine-casing, a crank-shaft, an oilreservoir thereunder, a pitman carried thereby, a cross-head carried by the pitman, a guide beneath said cross-head, a removable guide secured to the casing above said cross-head and provided with an oil-channel extending therethrough, an oil tray or liange disposed upon the casing above the crank-shaft to surround the pitman connection thereto and communieating with the channel in the removable guide, a cover for said tray adapted to drain therein at all its edges, and means carried by said shaft to raise oil from said reservoir.

2. In an engine, a crank-shaft, a pitman extending therefrom, a casing provided with an opening in alinement with said pitman, a cross-head carried by said pitman and provided with a depending hooked portion, a piston, a piston-rod provided with a head to bev embraced by said hooked portion, and a closure-plate for said opening provided with a top guide for the cross-head.

3. An engine-casing having an opening in its top, a crank-shaft, a pitman carried thereby in alinement with said opening, a crosshead carried by the pitman, a guide beneath said cross-head, a removable guide-plate to close said opening secured to the casingabove said cross-head and provided with an oil-channel extending therethrough, an oil tray or flange disposed above the crank-shaft to surround the pitman connection thereto and communicating with the passage in the removable guide, a reservoir beneath said crank-shaft, a disk carried by said shaft and connected to the pitman, a piston and piston-rod, and a detachable hooked connection between said crosshead and rod.

4. In an engine, a casing provided at one end with an oil-reservoir in its lower portion, a lower cross-head guide at one side of said reservoir and provided with oil-recesses therein at its opposite ends, and a top guide disposed opposite said cross-head guide and provided with a longitudinally-disposed oil-passage and feed-openings therefrom.

5. In an engine, a casing provided at one end with an oil-reservoir in its lower portion, a cross-head guide at one side of said reservoir and provided with oil-recesses therein, a top guide disposed opposite said cross-head guide and provided with an oil-passage and feed-openings therefrom, a crank-shaft disposed in said casing above said oil-reservoir, and means carried by said shaft for automatieally feeding oil from said reservoir to the passage in said top guide.

In testimony whereof l afiix my signature in presence of two witnesses.

C. R. MCGAHEY.

Witnesses:

C. W. SHEPPE, S. GARNER.

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