US952791A

US952791A - Steam-turbine engine.

Info

Publication number: US952791A
Application number: US49410709A
Authority: US
Inventors: Ellis F Edgar
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-05-05
Filing date: 1909-05-05
Publication date: 1910-03-22
Anticipated expiration: 1927-03-22

Description

E. F. EDGAR.

STEAM TURBINE ENGINE. APPLICATION FILED MAY 5. 1909.

952 79 1 Patented Mar. 22, 1910.

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E. F. EDGAR. STEAM TURBINE ENGINE. APPLICATION FILED MAYB, 1909.

Patented Mar. 22, 1910.

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E. F. EDGAR. STEAM TURBINE ENGINE.

APPLICATION FILED MAYS, 1909.

952;79L Patented Mar.22,1910.

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ANDREW n. GRAHAM co.. PnoTounwsRAPhgns,wnsumsToN n c F. F. EDGAR.

STEAM TURBINE ENGINE.

APPLICATION FILED MAY5, 1909.

Patented M31222, 1910.

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fllllllIIIIIllllllllllllllllllimlll WITNESSES @FFEQE ELLIS F. EDGAR, OF WOODBRIDGE, NEW JERSEY.

STEAM-TURBINE ENGINE.

To all whom "it may concern:

Be it known that I, ELLIs F. EDGAR, citizen of the United States, and resident of Voodbridge, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Steam- Turbine Engines, of which the following is a specification.

Figure 1 is a plan view of a five cylinder engine. Fig. 2 is a vertical elevation view of a one-cylinder engine part in section through the puppet valve and in front of the puppet valve. Fig. 3 is a section view through a cylinder behind the puppet valve. Fig. 4: is a side view of one of the multiple cams. Fig. 5 is an end view of one of the multiple cams. Fig. 6 is a section view through the puppet valves and upper portion of high pressure steam chests and longitudinal side elevation view of the opening and closing and full stroke cams. Fig. 7 is an end View of one of the opening and closing and full stroke cams.

I had in view in designing this engine a steam turbine capable of using steam at one thousand pounds pressure or more, and to be used with or without a cut-off valve preferably with a puppet cut-off valveand pref erably with four or more cylinders, whereby an early cut-ofl' can be used thereby obtaining economy as hereinafter set forth.

Details of c0astructi0n.1, outside casing of cylinder; 2 end and inner circumference casing of cylinder; 3, movable blades; el stationary blades; 5, high pressure steam chest; 6, first expansion steam chest; 7, second expansion steam chest; 8, puppet valve; 9, multiple cam; 10, spring for closing puppet valve; 11, bar for guiding puppet valve stem and yoke; 12, driving shaft of engine; 13, multiple cam shaft; 1%, gearing from engine shaft to multiple cam shaft; 15, driving wheel of engine; 16, packing strips; 17, live steam line; 18, exhaust steam line; 19, eX- haust port; 20, ratchet arm shaft; 21, con nection for operating ratchet arm shaft; 22, governor belt; 23, governor; 2 1, ratchet arms; 25, bearing for multiple cam shaft, also bearing for the bar guiding the puppet Valve stem; 26, plate secured to driving wheel 15.

General remar7cs.This engine of the steam turbine type is composed of a circular cylinder having two rows of steam chests extending all the way around from the inlet port to the exhaust port, said steam chest Specification of Letters Patent.

Application filed May 5,

Patented Mar. 22, 1910.

1909. Serial No. 494,107.

containing the stationary blades of the en gine, which are numbered 4, and located between these two rows of steam chests and stationary blades 4 are located moving blades 3, which are secured to the outer periphery of driving wheel 15, said driving wheel being made steam tight by packing strips 16, which bear against plates 26, both the pack ing strips and these plates can be easily renewed. The packing strips are held againstthese plates by springs. Driving wheel 15 is secured to driving shaft 12. Steam enter ing high pressure steam chest 5 preferably at one thousand pounds pressure or more is guided by the stationary blades in said steam chest 5 on moving blades 3 and through stationary blades and steam chest 6 to the upper portion of the open space in steam chest 6, which permits of the first expansion, then passes from the bottom of the open space in said steam chest 6 through the stationary blades there located again on moving blades 3 and through the stationary blades located in the second expansion steam chest 7 to the upper portion of the open space in said steam chest 7, thence to the bottom of the open space in said steam chest 7, then through the stationary blades there located again on the moving blades 3, and in this manner passes backward and forward to the steam exit, giving the desired number of expansions to obtain the desired economy according to the diameter of the engine. These steam chests increase in area from the inlet port to the exhaust port and preferably the number of stationary blades in said steam chests increase in number and preferably the spacing between these stationary blades increases in distance between said blades, while the distance between moving blades 3 is the same. In an engine of four cylinders or more the steam may be admitted through the puppet valves in conjunction with the multiple cams to all of the cylinders in starting and then cut off automatically at any desired point. It will readily be seen that in a 6 cylinder engine cutting off at one-sixth the stroke orin an eight cylinder cutting off at one-eighth the stroke a high economy may be obtained, from a simple and compact engine, and one or more of the cylinders may be cut out of action in an engine of this type as shown in Fig. 6 which shows the upper end of live high pressure steam chests with their balanced cylinder 1 puppet valves two open and three closed and a longitudinal side elevation of the opening and closing and full stroke cams. These cams open and close the valves and allow the steam to flow through the open valves at boiler pressure continuously while open. They do not pulsate or cut off at part stroke. They canbe operated automatically or manually as desired. Economy is obtained with these cams by opening only enough valves to carry the load, 011e, two or more or all as desired and by using full boiler pressure through only enough valves to take care of the load the highest economy can be obtained. In using the cams shown in Figs. 4a and 5 economy is obtained by cutting off at any part ofthe stroke desired, and: the same l'oa-d carried by simply moving the multiple cam to another cut-off, and in an eight cylinder there can be two cylinders added to desired there would alsobe a loss due to the While this engine may be back pressure. operated withouta cut-off valve, I prefer a cut-off valve and preferably a puppet cut-otl' valve of the type here shown. To prevent leakage by the sides and outer ends of moving blades 3 between the back of the inlet port and the exhaust port, I would place a red metal plate held against the blades at this point by springs.

I do not confine myself to the exact formof blades herein set forth as I may change the area and shapes, or use ports in the steam chests.

.Having described my invention, what I claim as new and desire to secure by Letters Patent is 1. A steam turbine engine, having a plurality of high pressure steam chests each with an inlet port containing a balanced While this In a one-cylinder engine the ,1 cylinder puppet valve and means for operat sure may be admitted through all or any number of said valves as desired.

2. A steam turbine engine having a plurality of high-pressure steam chests, each with an inlet port containing a puppet valve in conjunction with an opening and closing cam, composed of different diameters of varying widths of surface and so arranged at each valve whereby steam at boiler pressure may be admitted through all or'any number of said valves as desired for the full stroke and continuously.

3. A steam turbine engine having a balanced puppet cut off valve in conjunction with a multiple cam consisting of a series of cams of varying length, whereby steam may be admitted to the cylinder in starting for the full revolution by moving the multiple cam to the last cam which extends the full circle and when the engine is running steam may be admitted to the cylinder for any part of the revolution desired by moving the multiple cam to a cam extending the desired length of the circle and whereby the cut off will take place automatically as set forth.

a. A steam turbine engine composed of a plurality of cylinders, each cylinder having a balanced puppet cut-off valve in conjunction with a multiple cam consisting of a series of cams of varying length, whereby steam may be admitted in starting to all of the cylinders simultaneously by moving the multiple cam to the last cam which extends the full circle and when the engine is running will admit steam to each cylinder independently and successively by moving the multiple cam to one of the cams extending only part of the circle and on diiferent locations of the circle for each cylinder and whereby the cut off will take place automatically, all substantially as set forth.

Signed at New York in the county of New York and State of New York this fourth day of May A. D. 1909.

ELLIS F. EDGAR.

l ing the same, whereby steam at boiler pres-