US1570313A

US1570313A - Locomotive

Info

Publication number: US1570313A
Application number: US48048A
Authority: US
Inventors: Clinton O Mikle
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-08-04
Filing date: 1925-08-04
Publication date: 1926-01-19
Anticipated expiration: 1943-01-19

Description

J'an. 19 1926.

C. O. MIKLE LOGOMOTIVE 3 Sheets-Sheet l Filed Augusil 4, 1925 atto: "m15,

,JWM @WMM .lh nog opened.

Patented Jan. 19 1926'.

UNITED STATES CLINTON O. MIKLE, OF PORTLAND, OREGON. i

LOCOMOTIVE.

Application led August 4, 1925. Serial No. 48,048.

To all 'whom t may concern Be it known that I, CLIN'roNO. MIKLE, a

citizen of the United States of America, re-l siding at Portland, in the county vof Multnomah and State of Oregon, have invented certain new and useful Improvements in Locomotives, of which the following is a specification, reference beingL had therein to the accompanying drawing.

This invention relates to locomotives and is more particularly directed to a device for cooling the engine cylinders and which is adapted to be employed in connection with the timing piston described and claimed in my copending application filed December 22, 1920, Serial No. 432,548, patented Oct. 27, 1925, Patent Number 1,558,994.

An object of the invention is the pro-vision of a device which will place the. engine cylinders of alocomotive in communication with the atmosphere when the throttle has been closed, with the engine running and no steam in the cylinders.

Another object of the invention is the provision of a device which is automatically operated by the closing Aof the throttle to prevent a vacuum in the engine cylinders when the pistons are actuated by the progressing locomotive and after the cylinders have been treated with steam for a predetermined period of time to prevent carbonization of the lubricating oil.

A further object of the invention is the provision of a device for admitting atmospheric air directly to the engine cylinders and related parts which are normally affected by steam under pressure during operation of the engine, air being admitted after a predetermined period of time has elapsed after throttle closing, when the locomotive is drifting and continuous admission being maintained until the throttle is A. still further object of the invention is the provision of a valve positively actuated by a piston which controls the time for treating the engine cylinders with live steam after the throttle has been closed, said'valve controlling the admission of water under boiler pressure to a cylinder for operating a piston to close or open a'valve affecting the flow of air to the engine cylinders.

This invention will be best understood from a consideration of the following detailed description, in view of the accompanying drawings forming apart of the specification; nevertheless it is to be understood that the invention is not confined to the disclosure, being susceptible kof such changes and modifications which shall define no material departure from the salientV features of the invention as expressed in the appended claims.

f In the drawings:

Figure l is a longitudinal view in elevation of a locomotive shown more or less diagrammatically with my invention applied thereto.

Figure 2 is a plan view of a timing apparatus for admitting steam to the engine cylinders with my invention applied thereto.

Figure 3 is a vertical section of the device shown in Figure 2,` taken along the line 3-3.

Figure 4 is a fragmentary vertical section of a part of the device shown in Figure 2.

Figure 5 is a transverse vertical section `taken along the line 5-5 of Figure 6 of a controlling valve.

Figure 6 is a longitudinal section of the controlling valveshown in Figure 5. 4

Figure 7 is a` planV view of an. hydraulic operated air valve. i Figure 8 is a vertical section taken along the line 8-8 of the device shown in Figure 7.

Figure 9 is a verticaly section of the differential piston structure shown in Figure 8.

Figure 10 is a transverse section of the device shown in Figure 8V disclosing the connection between the air valve and the piston structure. l

It will be necessary to recite briefly the op eration of the timing mechanism described in my (1o-pending application referred to above and which controls the admission of steam to the engine cylinders to prevent a too rapid cooling 'of said cylinders before the device forming the subject matter of the present invention is -set in motionV for admitting atmospheric air to the engine cyl.- inders.

Referring more particularly to rFigures l, 2, 3 and 4, a valve 321 in pipe 32a connected i between a source of steam under pressure from the boiler is operated to admit steam simultaneously to

pipes

18 and 32. When the throttle is open the steam pressure in

pipes

18 and 32 will have no etiect upon valve 25 and valve 41 since live steam from the valve chest of the cylinder passes through pipe 18b and acts upon valve 25 from the chamber 15, upon piston 22 through the bypass 13 and upon piston 37 in the cylinder 26. Pipe 36 connects

cylinders

12 and 36. Since the areas or'

pistons

22 and 37 are greater than the areas or the respective valves 25 and 41 affected by steam pressure said valves will remain closed. rit this time the face 2Ob orl piston 2O in timing cylinder is acted upon by hydraulic pressure from the boiler to maintain the piston in the position shown in Figure 3. rlhe pipe a connect-s the boiler of the engine below the minimum 10W Water level with the passage 43 in the valve casing 42 and opens valve 44 against the tension oi the sprino- 46 to admit water to passage 43 and port 10 to the timing cylinder 7 and against the :face 26h of piston 20 and against piston 21. Steam also acts on the opposite tace of piston 21 from cylinder 12.

Then the throttle is closed steam is no longer admitted to pipe 18b thereby relieving pressure in chamber 15, on valve 25, and

pistons

22 and 37. Steam from pipe 18 toro-es valve 25 open admitting steam to pipe 18", to the engine cylinders through by-pass 13 to the annular passage 22i1 around piston 22 in cylinder 12, through pipe 36 to cylinder 26. At the instant that steam is cut off in pipe 18b and pressure is relieved against

pistons

22 and 37, both pistons are moved in opposite directions from that shown in Figures 3 and 4 by the action of steam pressure respectively on valves 25 and 41. In these positions, piston 22 abuts cylinder 11 and the attaching flange of said cylinder and is held against movement by reason of the pressure against piston 23 and valve 25 and piston 37 is retained by pressure on valves 40 and 41 from pipe 32. lll/Then valve 41 is forced, steam is admitted to pipe 34 from the valve casing 29 and to cylinder 7, the steam acting upon the face 2Oa of piston 2O to force said piston against the hydraulic pressure in said cylinder. wWater is forced through port 10 opening the timing valve 47, thence through pipe 45il to the boiler.

The speed of piston 2O is retarded by the timing valve 47 so that sufficient time .elapses bet-ore steam is shut otl from the engine cylinders by the closing o'f valve 25.

lVhen pistons 2O and 21, which are connected for simultaneous movement by the rod 19, are forced towards piston 22 the boss 21L on piston 21 will engage piston 22 and torce said piston in an opposite direction thereby moving valve 25 on its seat and shutting ottl steam to pipe 18b when air is admitted to the engine cylinders, valves and steam chests by the device forming the subject matter of the present invention.

As shown more particularly in Figure 2, the head 50 or" the cylinder 7 is provided with a threaded passage into which is screwed a boss 51 projecting from one end of a valve casing 52enclosing an operating device for affecting the admission of air to the engine cylinders. rihe boss (Figure 6) has a central passage 53 in communication with the cylinder 7 for supplying a chamber 54 with Water under boiler pressure.

A valve 55 has a stein 56 projecting through the passage 53 and adapted to be engaged by the face 2Ob of the piston 20 when water in cylinder 7 is nearly exhausted and when valve 25 is being' closed to shut oil" steam from the engine cylinders. The valve has its top and bottom faces-'slidably mounted in grooves 57 formed in the walls or" a bushing 57a received by the casing 52, the walls of said bushing beingV spaced from the side walls ot' the valve to provide passages 58 which connect the passagel 53 and groove 59 with the chamber 54. VGrooves 5S) in the end of the valve adjacent the stem 56 maintain the passage 53 in communication with passages 58 except when the valve is noved in a direction which is away from the boss 51. A spring 60 has one end in a socket 61 in the inner end of the valve and its other end in a socket in a removable plug 62 which is screwed into a threaded open end ot the casing. A polygonally faced nut 63 ou the plug is adapted to be engaged by a suitable tool for removing or applying the plug to said casing. The spring normally maintains the valve in the position shown in Figure 6.

r1`he valve has a chamber 64 connecting an exhaust port 65 and an admission port 66 iormed in the valve casing 52 and bushing 57a. A port 67 connects the chamber 54 with a pipe 68. The port 66 is connected with a pipe 69, while port 65 is in communication with a discharge pipe 69a.

The operating device for controlling the admission oi air is directly connected to a vasing 70 by the

pipes

68 and 69, the casing enclosing a timing arrangement for admitting air to the engine cylinders. rEllis casing has a conduit 71 which is secured by means ot a flange to the steam admission pipe 73 and in open communication with said pipe. steam chest 74 on the engine cylinder 75.

rlhe upper end of the casing 70 is divided by partition 76 into an air chamber 77 open to the atmosphere by a series or" perio-rations 78 in the wall of the air chamber, and a chamber 79 which is connected below a piston 80 with the chamber 54 in the valve easing 52 by the pipe thus causing the chamber 79 to be filled normally with water The pipe 73 is connected to the from the boiler of the engine acting upon the inner faces of

pistons

80 and 81. The pipe 69 connects the chamber 64 in the' valve with the casing 70 above the piston 80 and below a closure 82.

Piston 81 is mounted for reciprocation in a cylinder 83`which may be cast integrally with the partition 76 and has its upper open end projecting into chamber 79 while the lower open end extends into chamber 77. Piston 80 is connected to piston 81 by a rod 84. f

A rod 85 connected to piston 81 projects through the lower open end otthe cylinder 83 into air chamber 77 and is provided with a shoulder 86 received by a socket 87 onthe inner face of a. valve 88. The valve is adapted to engage a seat 89 and normally7 close communication between the air chamber'77 and the conduit 71 leading to the engine cylinders.

Since the valve 88 is loosely connected with rod 85 a guide 90 is provided in the conduit 71 to receive stein 91 for aiding "i in seating the said valve after the same has been operated. The socket 87 has a passage 87n through which the rod 85 may be passed to remove the valve 88 from the rod.

It will be noted that the conduit 71 at its outer end has a 'flanged threaded opening at 92 into which is screwed the lower threaded open end. 93 of the casing 70.

The operation of my device is as follows:

When the piston 2() has been advanced by steam pressure on the tace 20 to a position where it. forces the stein inwardly of the casing 52, valve 55 is moved longitudinally of said casing against the tension of the spring until shoulder 55a on the valve is placed between ports and 66 closing port 66 to the atmosphere which is normally open thereto through the connection ot chamber 64 and port 65. Port 66 is now open tothe end of the bushing 57a adjacent the passage 53 whereby boiler water from timing cylinder 7 is forced through pipe 69 into the casing and against the upper face of piston 80. Due to the fact'that the combined areas of the upper faces of pistons and 81 which are acted .upon by hydraulic pressure through pipes 68 and69 from the valve casing 52, -is greater than the area of the lower :tace oi piston 80, piston 80 is moved downwardly.

Jorcing Water from chamoer 79 into pipe 68, through valve casing 52, where itr combines with water from cylinder 7.

' As piston 81 descends valve 88 is removed from its seat 89 permitting air from chamber 77 to be drawn through conduit 71 to the engine cylinders, to prevent a vacuum formed therein and to permit the locomotive to dritt without restraint.

When the engine throttle is again opened for operating the engine pistons, timing piston is again returned to its normal position shown in Figure 3 since steam pressure passing throughpipe 18h, pipe 13, cylinder 12, pipe 36 to cylinder 26 causes piston 37 to force valve 41 on its seat and valve 40 from its seat, thereby opening pipe 34 to the atmosphere through pipe `35. The steam in cylinder 7 which has been acting on Jface 20- ot piston 2O escapes through

pipes

34 and 35 to the atmosphere relieving pressure on piston'20.

As soon as piston 2O moves away fromstem 56 spring 60 forces the valve 55 inwardly toward cylinder 7 and places chamber 64 in communication with ports 65 and 66. Hydraulic pressure from the boiler which through Vpassages 53 and 58, chamber 54 inthe valve casing 52 and pipe 68 acts upon the inner face ot' piston 8O causes said piston to move upwardly forcing the water in chamber 78 through pipe 69,` portf66, 1'

rection by hydraulic pressure from the boiler, means for controlling the admission of steam to the timing cylinder for actuating the piston in the opposite direction when the engine throttle is closed, a valve ttor controlling the admission of air to the engine cylin4- `ders,'an hydraulic means associated with the Steam entering conduit 71 acts j air valve for causing closingvand opening ot the air valve, avalve for controlling the hydraulic means, a resilient means Vcooperating with the timing piston to actuate the last mentioned valve for controlling ther hydraulic means to operate the air valvei 2. In a locomotive, means for admitting steam to the engine cylinders when the throttle is closed, said means shutting ofi the steam aftera predetermined period of time,

,a valve for controlling the admission of air to the engine cylinders after the steam has been cut oli', means toi' actuating said valve, no

means for cont-rolling the actuating means, and means cooperating with the means 'or admitting steam to operate the controlling means.

3. In a locomotiva-means for admittingsteam to the engine cylinders when the throttle is closed,l said means shutting 0E the steam after a predetermined period of time, a valve for controllingl the admission of air to the engine cylindersafter the steam has been cutjotl", means for actuating said valve,

means for controlling the actuating means, and means. cooperating with the means for admitting steam to operate the controlling means for causing' actuation oit the air Valve after a predetermined period ot time has elapsed after the steam has been shut oil'.

el; ln a locomotive, means tor admitting steam to the engine cylinders When the throttle is closed, said means shutting oil the steam alter a predetermined period oi time, a valve lor controlling the admission of air to the agine cylinders after the steam has been cut ofi', an hydraulic means for operating the Valve, a valve for controlling the hydraulic means, and means cooperating with the means for timing the admission ci steam to the engine cylinders 'for actuating the last mentioned valve.

5. ln a locomotive, means for admitting steam to thc engine cylinders when the throttle closed, said means shutting oil the steam alter a predetermined period ot time, ayalve for controlling the admission ot' air to the engine cylinders alter the steam has been cut a pair oit differentially constructed pistons for operating the air valve,

lsaid pistons being actuated by hydraulic pressure from the boiler, a valve` for controlling the hydraulic pressure against the pistons, and means cooperating With the means for timing the admission ot steam to thel engine cylinders for controlling operation of the last mentioned Valve.

6. In a locomotive, means tor admitting steam to the engine cylinders when the throttle is closed, said means shutting off the steam after a predetermined period of time, a Valve for controlling the admission ot' air to the engine cylinders alter the steam has been cut olf, a plurality of cylinders of different diameters, connected pistons titled lor movement in the cylinders for operating the air valve, a conduit normally placing the cylinders in communication with the,

boiler for maintaining hydraulic pressure against both pistons in opposite directions to retain the air Valve closed, a by-pass connecting the larger cylinders at one side of the larger piston With the conduit, a Valve interposed in the by-pass for controlling the flow of Water to the larger cylinder to actuate the larger piston against the hydraulic pressure against bothvpistons, and means cooperating With the timing means for admitting steam to control the actuation of the last mentioned Valve.

7. ln a locomotive, means for admitting steam to the engine cylinders when the throttle is closed, said means shutting oli' the steam a'tter a predetermined period of time, a valve for controlling the admission ont air to the engine cylinders after the steam has been cut off, a plurality of cylinders of dillerentdiameters, connected pis tons tted for movement in the cylinders cylinder, to actuate the larger piston lagainst the hydraulic pressure against both pistons, said last mentioned valve maintaining the ay-pass normally open to the exhaust, and means cooperating with the timing means icr admitting steam to control the actuationl oi" the last mentioned valve.

8. ln a locomotive, means for admitting steam to the engine cylinders when the throttle is closed, said means shutting oft the steam after a predetermined periodici.

time, a valve 't'or controlling the admission olf air to the engine cylinders after the steam has been cnt oft', al plurality ofcylinders oi different diameters in open communie-ation with each other, a piston in thc smaller cylinder, a piston in the larger cylinder connected to the smaller piston and separating the larger cylinder into two chambers, one chamber being in commun-ication with the smaller cylinder, a conduit normally placing said chamber in communication with the boiler for maintaining hydraulic pressure against both pistons in opposite directions to retain the air Valve closed, a by-pass connecting the other chambei' With the conduit, a valve interposed in the by-pass for cont-rolling the flow of Water to the second mentioned chamber to actuate the larger piston against the hydraulic pressure against both pistons, and means cooperating with the timing means for admitting steam to control the actuation of the last mentioned valve.

9. ln a locomotive, means for admitting,`

steam to the engine cylinders When the throttle is closed, said means shutting olil the steam alter a predetermined period of time, a valve for controlling theradmission ot' air to the engine cylinders after the steam i has been cut oil', means actuated by hydraulic pressure from the boiler for operating the air Valve to closed or open position, a conduit connecting the actuating means with the boiler to normally maintain said means in action to ret-ain the air Valve closed, a by-pass connecting the actuating means With the conduit, a valve interposed in the by-pass causing Varying vof the hydraulic pressure in the actuating means whereby said means is operated to open the air valve, and means cooperating With the timing means tor admitting steam to .factuate the last mentioned valve.

lO. In a, locomotive, a timing cylinder in CTI communication with the boiler, a timing pis',- ton in the cylinder and operated in oney direction by hydraulic pressure from the boiler, means for controlling the admission of steam to the timing cylinder for actuating the piston inthe opposite direction when the engine throttle is closed, a valve for controlling the admission of' air to the engine cylinders, means actuated by hydraulic pressure from the timing cylinder for normally maintaining the air valve closed, a valve provided With a stem projecting into the timing cylinder and engaged by the piston for actuating the valve when said piston has been operated by steam pressure,

said valve When operated by the piston being adapted to vary the hydraulic pressure to the actuating means for the air valve and cause said actuating means to open the air valve. f

11. In a locomotive, a timing cylinder in communication With the boiler, a timing piston in the cylinder and operated in one direction by hydraulic pressure from the boiler, means for controlling the admission of steam to the timing cylinder for actuating the piston in the oppositedirection when the engine throttle is closed, a valve for controlling the admission of air to the engine cylinder, means actuated by the hydraulic pressure from the timing cylinder for normally maintaining the air valve closed, a

conduit and a valve casing placing the actuating means in communication with the timing cylinder, a ley-pass connecting the casing with the actuating means, a valve in the casing having a stem projecting into the timing cylinder and engaged by the piston for actuating the valve when said piston has been operated by steam pressure, said valve When operated by the piston adapted to open the by-pass to the actuating means to vary the hydraulic pressure to the actuating means for the air valve and cause said actuating means to open the air valve.

12. In a locomotive, means for admitting steam to the engine cylinders when the throttle is closed, said means shutting oil:l the steam after a'predetermined period of time, a valve for controlling the admission of air to the engine cylinders after the steam has been shut oli', a differential means Aadapted to be actuated rby hydraulic pressure from the engine boiler for causing opening or closing of the air valve, means for controlling the hydraulic pressure, and means cooperating with the timing means for admitting steam for causing actuation of the controlling means for the hydrauli/i pressure.

13. In a locomotive, means for admitting Steam to the engine cylinders when f the throttle is closed, said means shutting oii the steam after a predetermined eriod of time, a valve for controlling the a mission of air to the engine cylinders afterhthe steam has 'been shut oli', a differential means adapted to be actuated by hydraulic pressure from the engine boiler tor causing opening or closing ot the air valve, means for controllingv the hydraulic pressure, and a resilient means acting in opposition to the timing means for admitting steam and cooperating with said means for causing actuation of the controlling means for the hydraulic pressure. f

14. In a locomotive, means oradmitting steam to the engine cylinders When the throttle is closed, said means shutting oif the steam after a predetermined period of time, a valve for controlling the admission of air to the engine cylinders aiter the steam has been shut off, a differential means adapted to be actuated'by hydraulic pressure from the engine boiler for causing opening or closing of the air valve, means for controlling the' hydraulic pressure, said last mentioned means comprising a valve casing in communication with the boiler of the locomotive,la valve in the casing having its side yWalls spaced from the casing to provide longitudinal passages connecting the opposite ends of the casing, said casing having an inlet and a discharge port, a chamber in the valve adapted to normally maintain the ports in communication, the casing being provided with a third port normally open ,i

to the longitudinal passages in the casing, a conduit connecting the last mentioned port with the differential means to effect normally a closure of the air valve, a by-pass connecting the `Enletport with the differential means, said valve in one position placing the longitudinal passages in the casing in communication with the by-pass and the differential means to affect opening of the air valve.

15. In a locomotive, means for admitting steam to the engine cylinders when the throttle is closed, said means shutting off the steam after a predetermined period of time, a valve for controlling the admission of air to the engine cylinders after the steam has s been shut off, a differential means adapted to be actuated by hydraulic pressure from the engine boiler for causing opening or closing of the air valve, means lfor controllingthe hydraulic pressure, said last mentioned means comprising a valvetioned port with the differential means to efof the air Valve, a stem on the valve and. posifeet normally a closure of the air valve, a tively actuated by the first means when ley-pass connecting the inlet port With the steam is being shut oil' to move the valve and 10 differential means,l said valve in one posicausing opening oi' the air valve.

5 tion placing the longtudinal passages in the In testimony whereof I hereunto aix my easing in communication with the ley-pass signature. and the differential means to electopening- CLINTGN O. MIKLE.