US511581A - Ard herbert lapage - Google Patents

Description

(No Model.) 7 1 A. VON BORRIBS.

COMPOUND ENGINE No. 511,581. Patented Dec. 26, 1893.

Wdneazsas Inventor 0%, %w%nnw%/ M THE NATIONAL LITHOGRAFHING COMPANY WASHINGTON u c UNITED STATES PATENT FFICE. I

AUGUST VON BORRIES, OF HANOVER, GERMANY, ASSIGNOR TO HIMSELF,

THOMAS WILLIAM \VORSDELL, OF STONYCROFT, ENGLAND, AND RICH- ARD HERBERT LAPAGE.

COMPOUND ENGlNE.

SPECIFICATION formingpart of Letters Patent No. 51 1,581, dated December 26, 1893.

Application filed g st 11. 1892. Serial No. 442,774. (No model.) Patented in Switzerland, 1892, No. 5,050, and in Germany February 27, 1893,1lo. 67.234.

, for compound engines whereby an engine provided therewith can be worked at will either as a compound engine, or as a non-compound engine, as for instance when it is desired that the power of the engine should be temporarily increased to meet special demands above the normal working average,as forexamples, inthe case of alocomotive, for ascending an incline, for starting a heavy train, or for shunting rapidly. According thereto within a suitable valve case are arranged two connected piston valves that control passages between the receiver and the low pressure cylinder, between the receiver and the low pressure exhaust passage and between a high pressure stea'm pipe and the low pressure cylinder'i One of these valves, hereinafter called for distinction the exhaust valve, is larger than the other and serves when the engine is working compound to prevent the passage of steam from the receiver to the low pressure exhaust passage direct. The smaller valve (hereinafter termed the steam valve) is under these circumstances inoperative, but by admitting live steam behind it, both it and the exhaust valve will be automatically moved into such positions that.

the exhaust from the high pressure cylinder can pass from the receiver direct. into the low pressure exhaust pipe, while the said live steam will pass at a reduced pressure into the low pressure cylinder which thereby becomes for the time being, a high pressure cylinder, with a consequent augmentation of power in the engine. I V

In the accompanying drawings, Figures 1 and 2 are longitudinal central sections of valve apparatus constructed according to this invention, Fig. 1 showing the valves in position for working the engine to which they are applied, compound, while Fig. 2'shows the valves in position for workingthe engine as a non-compound engine.

A is a valve case formed with a high pressure exhaust passage B B adapted to form part of the connecting pipe or receiver'between the high and the low pressure cylinders, and with another passage 0 6 adapted to form part of the low pressure exhaust pipe or passage.

D is a valve, herein called the exhaust valve; it is in the form of a piston and is arranged to control an exhaust port or passage E connecting the two passages B B and O O and to control the flow of exhaust steam through the passage B B from the high to the low pressure cylinder.

F is a valve, herein called the steam valve;

it is in the form of a piston, and is arranged to Work, as shown, in a cylindrical portion or extension A of the valve case provided with a steam inlet G that is in communication with the main steam pipe, or direct with the boiler,

or is adapted to be placed in communication with either by a cook or valve that may be worked by hand or from the reversing rod, or by a suitable construction of regulator valve as will be readily understood without drawlu s.

3& is an opening for placing the front end of the extension A in communication with the atmosphere, so that the valve F can make its outstroke easily.

The two valves are connected by a rod H.

The steam valve F is arranged to control the tition or diaphragm A* placed between the cylinder in which the steam valve F works and the passage 13 B, and prevent live steam flowing freely to the low pressure cylinder or cylinders until the exhaust valve D is fully opened as shown in Fig. 2 at which time the part H of the rod of smaller diameter will extend through the holein the said partition or diaphragm and leave a free passage for live steam to the end B of the said passage B B whence it can flow to the low pressure cylinder.

By the arrangement described when live steam is admitted through the said steam inlet G so as to act behind or upon the inner end of the valve F, the two connected valves D F will be automatically moved by the pressure of the live steam on the steam valve F into the positions shown in Fig. 2. The exhaust valve D will then close the passage 13 13' between the high and low pressure cylinders and open the exhaust port or passage E, so that each cylinder can exhaust separately into the exhaust pipe or passage C C, and the steam valve F will occupy a posit on in which the part H of the rod connectng the valve will extend through the hole in the partition or diaphragm A- and leave an annular opening as shown that will effect a ,communication between the main steam pipe or boiler and the valve chest of the low pressure cylinder or cylinders so that the engine will then work as an ordinary high pressureornon-compoundengine. lVhen the supply of live steam to the steam inlet G is cutofl, the valves will by reason of the greater pressure onthe exhaust valve of steam within thatpart B of the receiver between the valve case and the steam chest of the low pressure cylinder, return automatically to their normal positions shown in Fig. 1,and the engine will again work as a compound engine.

When the engine is working non-compound and the thicker part H of the valve rod will have passed out of the hole in the intermediate plate or partition A and formed a steainpassage of such size as to reduce the pressure of i the live steam that is then flowing through this ,hole (by throttling it), in such manner that the total force of the full pressure on the smaller valve F is kept equal to the total force of the reduced pressure on the larger valve D. As a consequence of this arrangement the followingimportant results are attained: It the consumption of steam at the reduced press- ,ure inthe low pressure cylinder becomes greatenthe pressure in the passage B will. be reduced a little thereby causing less force, on the larger piston and motion of both pistons to enlarge the opening H through plate till the right amountof reduction isagain reached. If the consumption of lower pressure steam is reduced, the pressure in Bwill increase a little thereby causing the pistons to move back a littleand reduce the size of the open- 60. in g H till the right red notion is again reached.

The amount of reduction is proportionate to the areas of piston valves F and D. Thus if the smaller one is one half the area of the large one the pressure in B will be reduced to onehalf. Furthermore this arrangement possesses the excellent feature of reducing the steam pressure in B to the proper amount to enable the total pressure on each piston to be equal when working ,non-cpm pound thereby preventing too great a strain on the working parts and enabling the adhesion of the driving wheels of a locomotive to be utilized in the most advantageous manner.

YVhatI claim is l t 1. In a compound engine,.the combination with valves for controlling the communication between the high and low pressure cylinders, a high pressure exhaust port and asteam passage by which live steam can flow at a reduced pressure to the steam chest of the low pressure cylinder, of a steam chamber arranged to be directly connected with the main steam. supply, and a steam actuated piston arranged to work insaid cylinder and connected with said valves so as to actuate the same in an automatic manner whenlive steam is admitted to said steam chamber substantially as herein described for the purposes specified. I

2. h In a compound engine, valveapparatus for changing from compoundworhing to noncompound work ingicomprising a valve case having a steampassageadapted toformpart of the pipe orreceiverthat connects thehigh and low pressure, cylinders, a high pressure exhaust port leading from said passage, a live steam chamber,and a steam. reducing passage by which livesteam can pass. at a. re-

duced pressure from said live steam chamber to the low pressure cylinder,.valves adapted to simultaneously,control said, main steam p ag h p u exhaust po tandv stea r g p ss e. n a. te m pe at dir ton arranged in said steam chamber audconnected to said valves so that ,WhBIl steam is admitted to said chamber itwill automaticall y. move said piston and connected valves into Po ti to p t st am reduqiuap sage and high pressure exhaust port and close the steam passage between thehigh and low pressure cylinders substantially as, herein described for the purpose specified.

n a c mp u e e, c nne ti ip s et h hisha l w pressure. cy

i a l w p e exha atpas saah h.

pressure exhaust port, an exhaust value adapted to simultaneously control said connecting p s e and, ex a st t asse ses e l J mitting live or boiler steam atred ucedpressore to said connecting passage on fthe, low

pressure side otsaidexhaust valve, and a steam valve subject to the pressure otlive or boiler steam and adapted to, control said last mentionedpassage',said valves being of unequal area and connected togethersoas to work simultaneously and automatically when the pressure upon one side of said steam valve is made greater than upon the other side substantially as described.

4. In a compound engine, a connectingpassage between the .high and. low pressurccylin ders, piston valve adapted to, ,open and close said passage, an inlet for livesteam, a

contracted passage through which said steam valve of smaller area than said piston valve and subject to the pressure of said live steam, said valves being arranged at opposite sides of said contracted passage andconnected by a rod adapted to control the passage of live steam at a reduced pressure through said contraeted'passage to the lower pressure cylinder substantially as herein described.

5. In a compound engine, a connecting passage between the high and low pressure cylinders, a piston exhaust valve adapted to open and close said passage, a chamber for live steam, a piston steam valve adapted to work in said chamber and subject'to the pressure of steam therein, a perforated plate arranged between said chamber and said connecting passage, and a rod connecting said valves and extending through said plate, said valves being of unequal area and said rod being made of two diameters substantially as described for the purpose specified.

6. In a compound engine, a connecting passage B B between the high and low pressure cylinders, a piston valve D adapted to control said passage, a chamber A having an inlet at its inner end for live steam, and an opening at its outer end by which it is placed in communication with the external atmosphere, a piston valve F arranged to work in said chamber and of smaller area than said piston valve D, a perforated plate arranged between said chamber and said connecting passage, and a rod of difierent diameters connecting said valves and arranged to work through said perforated plate substantially 1 l as herein described for the purposes specified.

7. In valve apparatus for a compound engine, the combination of a valve case Ahavinga connecting passage B B, a low pressure exhaust passage 0 O and a high pressure exhaust port E between said passages, a cylindrical chamber A having an inlet for admitting live steam to its inner end and an opening at its outer end by which it is placed .in communication with the external atmosphere, a perforated plate arranged between said chamber and said connecting passage, a piston valve D arranged to control said connecting passage and said high pressure ex-,

AUGUST VON BORRIES.

Witnesses:

R. LUXEM, M. v. BUHoWsKY,

Both of Hanover.

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