US528275A

US528275A - Engine-reversing gear

Info

Publication number: US528275A
Authority: US
Publication date: 1894-10-30
Anticipated expiration: 1911-10-30

Description

(No Model.) 0 E. 1%., MARTIN. ENGINE REVERSING GEAR. h

No. 528.275.- Patented 00a. 30 1894.

Fig.1

(No ModeL) 3 SheetsSheet 2.

0. E. R. MARTIN. ENGINE RBVERSING GEAR.

:No. 528,275. I Y, Patented Oct. 30, 1894.

NKTED STATES CARL R. MARTIN, on PHILADELPHIA, PENNSYLVANIA,

ENGlNE=REVERSING GEAR.

SPEQIFICATIODT forming part of Letters Patent No. 528,27 5, dated October 30, 1894..

Application filed March 29,1894." Serial No. 505.546. (No model.)

To all whom it may concern..- Be it known thatl, CARL E. R. MARTIN, a

' citizen of the United States, residing .313 Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvementsin Engine-Re versing Gear, of which-the following isaspecification, reference being had therein to the accompanying drawings.

My invention relates to certain improvements in governing devices of that class form ing the suldject of an application for Letters Patent filed by me on February 1,1893, under Seh al No. 460,514); and it consists more particularly in the construction and arrangement of the mechanism for reversing the engine.

. with my invention.

I The invention further consists in certain improvements in the construction of the governing mechanism, as more fully set forth hereinafter.

In the accompanying drawingsz-Figure 1 isa sectional elevation of a governor and reversing mechanism constructed in accordance Fig. 2 is a sectional plan the same. Fig. 3 is a sectional elevation onthe line 3 -25 Fig. 5 illustrating a modification. Fig. 4 is a sectional elevation of a portion of the same, on the line 4-4. Fig. 3. Fig. 5 is a sectional plan view on the line 5-5 Fig. 3, and Fig. 6 is an elevation partly in section of a further modification of the invention.

The device as shown in the accompanying drawings, is intended more especially for use in connection with a marine engine, but it may be employed on a stationary engine, or other engine with but slight modification.

In suitable bearings in a stationary frame is a shaft A carrying an arm A from which extends a rod a connected to the link or link, block of the engine. On this shaft is also keyed a lover or arm 0, the movement of which through the shaft A and arm A governs'the position of the link block, or of the link, and consequently alters the speed ofthe engine. 7

B. B respectively are steam, or any kind of pressure, and water cylinders arranged in line and having pistons D. D both secured to a common piston red I) which is connected 'by a rod 1) to the arm 0 to transmit to the latter the movements of the pistons as they cylinders when'the valve is open.

are acted upon in reversing or in governing the speed of the engine.

E. E are two valve chests arranged on the same line and having valves e e of. the pistontype, both secured to acommon valve rod d.

The lower cylinder B and its valve chest E are formed in a single casting and are filled with water at alltimes, the cylinder communicating with the valve chest through portsf and then being at one side of the valve chest,

.2. by passf through which the water may flow freely to enter through both portsfinto the The upper or steam cylinder B and its valve chest E are also formed in asingle casting and are to prevent any communication between the cylinders. This upper cylinder is so designed as to economizethe amount of steam employed, and to th'agend its'lower portion is of less diameter than that portion in which the piston slides, and the upper head g of the cylinder is also formed of less diameter than the cylinder proper and the same.

The steam piston D. has its upper surface recessed partly to accommodate theinwardl-y projecting head g'of the cylinder and it becomes partly filled with water of condensation so as to reduce the quantity of steam employed. The lower face of the piston is of smaller diameter than its main body and is adapted to enter the smaller portion of the cylinder, as shown. The lower portion of the cylinder also becomes partly filled with wa ter of condensation so that the steam space projectspartlywithin below the piston is also materially reduced.

The valve chestE is provided with asteam inlet port 1' and outletor exhaust port 2" and upper and lower ports 2' and i respectively leading to the upper portion andlower portion of the cylinder 1-3.

The valves 9, c are secured to the valve rod d which at its upper end is centrally connected to a floating lever 'G, one end of the latter being connected by a rod (1 to a handled reversing lever J fulcrumed at 3' to a standard j on the frame. This reversing lever J travels over a segment K having open- IOC ings 71: into which may enter a locking screw K carried by the lever so that the latter may be locked, if desired, in position foreither going ahead, stopping or reversing.

To the arm is secured a segment M on which is provided an adjustable block on carrying a pivot pin m, to which is secured one end ofarod m the opposite end of which is connected to that end of the floatinglever G opposite the rod (1* and forms a fulcrum point for such lever dnring its movement through the reversing lever J, to shift the position of the valves; To the standard j is also pivoted a leverL one end of which, when the engine is running forward is secured to the leverJ by a set screwl which may be freely turned by hand to causeits disengagement from the lever J when it is desired to shift the position of the valves by hand and adjust the'position of the link block or link for starting or reversing. The opposite end a of the lever is connected by a rod G to a governing motor, such for instance, as that described in an application for Letters Patent filed by me on the th day of February, 1894, under Serial No. 500,875,01' any other suitable form of governnr,and so arranged that any variation in the speed of the engine will immediately act upon the rod G to either raise or lower the same and cause the opening of the valves e e and the consequent raising and lowering of the pistons and the shifting of the position of the link block, or link.

The operation of the mechanism, when the ports are in the position shown in the draw ings, with the screwK moved out of contact with the openings 7.; and the two levers Jand L connected by the screw K is as follows: Any variation in the speed ot" the engine will cause, through the mechanism described in myabove-mcntionedapplication,orany other kind of governor that may be used, a corre- '2' will be opened.

spending vertical movement of the rod G, and if the movement be in an upward direc: tion, the valve rod (Z will be depressed through the levers L, J and G and both valves c and The opening of the valve 6 permits steam to How from the entrance pert t' through the port 11 to the lower portion of the cylinder ll and opens communication between the upper portion of the cylinder and the exhaust. The steam then acts to raise the piston, and a corresponding upward movement is given to the lower piston D. This upward movement being, transmitted to the arm 0 immediately causes a corresponding upward movement of the segment M and acts through the red at to raise the end of thel'ever G with the rod (1 as a fulcrum, and brings the disks of thevalves c, e directly opposite the ports into their initial position, shutting elf both the steam and the water, and permitting no further movement of the pistons,

same result and effect corresponding unevements in opposite directionsot the various mentof the segment M both ports of the water cylinder are closed and the piston is immovably held and locked until the valve again opens.

The movements of the lever J by hand are,

of course, of the same character and when moved to the reversing position the screw k is turned to engage in the proper opening r of the segment K and held so long as the engine is running'backward. y

In the modified structure illustrated in Figs. 3, 4, and 5 the general arrangement of the levers is somewhat altered, the valve rod cZ being connected directly to the reversing lever J by a link d, at a point beyond its' fulcrum, and the reversing lever thus acts more directly upon the valves. In this structure also, a sleeve P, open at p, to permit the free passage of the water and having ports p corresponding to the various ports of. the upper and lower valve chests, is placed around the valves e, e and is connected by a sleeve N directly to the rod m When this construction is in operation, the movement of the lever L to raise the valve rod d will open communication between the upper portion of the cylinder B and the entrance port'z' and the pistons will be forced downward depress ing the arm 0 and consequently raising the segment M, which, in this instance, projects beyond the shaft A. This movement of the Ibo segment will raise the sleeve I until all its various ports 1) are opposite the disks of the V valves c and e, and thus out off all further flow of either steam or water. i

The motor-mechanism described in my aforesaid application is of delicate character and as considerable power is required to raise the two valves 6 and c it is more dosirable to effect the operation of the latter through an intermediate pressure cylinder R; the outer end of the lever L being in such case connected directly or indirectly to the piston rod r of the piston R and the rod G extending from the motor being connected to a vibratory cross head S to the center of which the valve rod 25 of the valve 15' is connected,and the other end connected to the piston rod 1' In this manner the movements of the rod G may be rendered more delicate.

and the accurate adj ustmcnt of the parts as h sured.

\Vhenever the reversing lever is used in the claims, it means the lever controlling the link or the link block or any other mechanism of the engine for the purpose of chang- I ing the cut ofi ot steam admitteddo the cylinder of ftheengine, whether the engine can ,7 ,be made to reverse its motion or not.

i Having"thu s described my invention, what as described. r5 2; Thecoinbination ofthecylinders,pistons ,th'ere'ima piston rod -extending from said'pisw-tons and connected to thelinkcontroll-ing .1 lever of the engine, the valves, a'valve stem, a floatinglever centrally connected-to said 20 valve stem, a reversing lever connected'to .one end of said floating leverjand the oppositej'end thereoffbeing operativelyfconnected to'the-link controlling lever, an autoinatic speed gq t rning mechanismand a lever "operatively connected thereto and adapted .tobe locked to the'rreversing lever, substanj ti'ally" as described. V I

. 3. Thecombinationof the rockshatjt, a leyerj secured thereto, the steam and water cylinders, pistons thereima piston rod carrying both, pistons and connected to said lever, the saidsteam and water valves," a reversing levet operatively connected thereto and a sliding valve sleeve surrounding said steamand 3'5-'water valves with means for operating thesame, substantially as described.

4. ,The combination of a rock shaft, a lever secured thereto,.asegment secured to said lever and projecting beyond the center of the "40 shaft, steam and water cylinders, the pistons therein, piston rod carrying both pistons and connected to said lever, the steam and water valves a reversing lever operatively connected thereto, a sliding ported valve sleeve surrounding said valves, and a connecting rod extending from said valvelsleeve to the segment, substantially as specified.

5. The combination of arock shaft, a lever secured thereto, a segment secured to said lever and projecting beyond the center of the same, a pivot block adjustable on said segment, steam and water cylinders, pistons therein, a piston rod carrying both pistons and connected tosaid lever, steam and water valves, a single valve rod carrying the same,

a reversing lever connected to said valve rod,

a ported valve sleeve surrounding thevalves, and a connecting rod extending from said, valve sleeve to the said adjustable pivot block, substantially as described. I

6; In a reversing and governing mechanism for engines, the combination of a steam cylinder and a water cylinder situated .on the same vertical line, pistons therein, a piston rod connecting both pistons, governing valves for controlling the supply of steam and water to said cylinders, communicating valve chests in which said valves arecontained, a ported valve sleeve surrounding said valves, and mechanism for automatically opening said Valves and for effecting the movement of the valve sleeve to close the same,'substantially as specified. 1

. In testimony whereof I affix my signature in the presence of two witnesses.

CARL E. R. MARTIN.

Witnesses:

. WALTER W. UALMORE,

DANIEL HALLAM.