US372691A

US372691A - Steam steering apparatus

Info

Publication number: US372691A
Authority: US
Publication date: 1887-11-08
Anticipated expiration: 1904-11-08

Description

(No Model.) 3 Sheets-Sheet 1.

L. W. & N. LOMBARD.

STEAM STEERING APPARATUS.

No. 372,691. Patented Nov. 8, 1887-.

FIG.2.

WITNESSES. l/VVE T06 M722 iZaadaw. Ema Jaeof l irrfofofi W Xanadu/1d Emrwmw ATTORNEY N. PETERS, Phowumo v'a her. Washington, D. c

3 Sheets-Sheet 2. i

(No Modem L. W. 85 N. LOMBARD.

STEAM STEERING APPARATUS.

No. 372,691. Patented Nov. 8, 1887.

- WITNESSES: //V Ell/T088.

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5 fiwamkwmdlw ATTORNEY (No Model.) I 3 Sheets-Sheet 3.

L. W. & N. LOMB-ARD.

STEAM STEERING APPARATUS. No. 372,691. Patented Nov. 8, 1887.

ls wwmm j ATTORNEY UNire STATES LEVI WILLIAM LOMBARD AND NATHANIEL LOMBARD, OF BOSTON,

MASSACHUSETTS.

STEAM STEERING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 372,691, dated November 8, 1887.

Application filed March 8, 1866.

To all whom it may concern:

Be it known that we, LEVI WILLIAM Loin- BARD and NATHANIEL Lonnim), both of Boston, in the county of Suffolk and State of Mas saehusetts, have jointly invented certain new and useful Improvements in Steam Steering Apparatus, of which the following, taken in connection with the accompanying drawings, is a specification.

The object of this invention is to provide a steam steering apparatus which will be prompt and effective in use and simple and economical in construction.

In the drawings, Figure 1 is a plan illustrating the general arrangement of the parts and means employed of connecting the operating mechanism of our invention with the tiller of the rudder, which it is adapted to operate. Fig. 2. illustrates, in elevation, the same general arrangement of parts of the op erating mechanism of ourinvcntion as is shown in plan in Fig. 1. Fig. 3 is a full section on. line \V \V of Fig. 4, looking toward the back end of the cylinder, made for the principal purpose of showing the exhaust-port in section and the supply and exhaust ports by dotted lines. X X of Fig. 3, showing the general arrangement of the valves and ports and the means employed in connecting the valves with their respective operating mechanisms. Fig. 5 is a full plan of Fig. 4, with the steam-chest cover removed to illustrate in plan the arrangement of the valve-connections, and also showing in plan by dotted lines the ports made in the cylder. Fig. 6 is a front elevation of Fig. 5, made for the principal purpose of showing the shape, arrangement, and position in elevation of the rocker-shaft. Figs. 7, 8, 9, and 10 are detail views of the valves. Fig. 7 is a plan of the sliding valve and a portion of the piston-valve, showing in plan the shape and arrangement of parts. Fig. 8 is a section of Fig. 6011 line Z Z, showing the sliding valve in section and the piston-valve in side elevation. Fig. 9 is a full section of Fig. 7 on line Y Y, showing in section the'sliding valve, piston-valve, and exhaust-port. Fig. 10 is an inverted plan of the sliding valve, showing shape and arrangement of the parts.

All the parts herein described are to be Fig. i is a partial section on line Serial N0.194,392. (No model.)

made of suitable material. The stuffing-boxes shown and designated are of the common kind. The piston and pistorrvalve paekings, as shown, are of a class known as the Tripps metallic. It is our preference that all packings used for piston,pist0n-valve, or rods should be of the metallic class; but such a preference is mainly one of choice and convenience.

In the drawings, the steam-cylindcr A, having the usual legs or supports by which it is fastened in its proper location in the usual manner of bolting, is bored and turned, and has fitted and bolted to it, in the usual manner, the front and back cylinder-heads, B and B, respectively. .a and a are the front and back piston-rod stuffing-boxes of the front and back cylinder-heads, respectively.

0 is the steam-chest, cast on or properly se1 cured to the cylinder A, and fitted with the steam-chest cover D, which is fastened to it by means of bolts.

1) and b are respectively the front and. back supply and exhaust ports. Each of the ports b and I), as the valves are manipulated, perform service as either a supply or an exhaust port.

c is the eXhaust-portin the cylinder A. The steam-chest cover is fitted with the stuffingbox d.

E is the steam-supply pipe, which supplies steam to the steam-chest O.

F is the steam-exhaust pipe, which connects with the exhaust-port c in the cylinder A.

G is the piston, which is secured to the piston-rod H, which plays through the stuffingboxes at and a. To the front portion of the piston-rod H is fastened the cross-head or yoke I, and to the front and back ends of the piston-rod II are fastened the eyebolts c and 0, respectively.

J, the sliding valve, has two supply and eX- haust ports, f and f, front and back, respectively, and the exhaust-port g. The ports f, f, and 5/ have their ports enlarged and recessed, as shown by the recesses f,f, and g, respectively, for the purpose of always, whatever may be the position of the sliding valve J, keeping the ports f, f, and g in free and open connection with the ports I), I), and 0, respectively.

K is the balanced piston-valve provided with the head K, and having thetwo pistonner.

packings h and h, each of which is wider than the ports over which it works, and which has secured to one end the pin 2'. The function of this valve will be hereinafter described.

L is the piston-valve spindle, to the upper portion of which is attached the handle 9', and to its lower portion the arm 76, which has secured to it the pin Z.

m is the connecting-rod, which makes the connection between the pin Z of the arm and the pin 2' of the piston-valve K. The handle j, arm 70, pin Z, connecting-rodm, and thepin i are arranged, as shown, so that the valve'K can be manipulated back and forth by the handlej and its connecting mechanism.

M is the rocker-shaft, which is supported in bearings in the overhanging ends of the brackets n and n, which are fastened to the steamchest 0. The rocker-shaft M has near its center the lever or wiper arms 0 and 0", having the pin p.- The pin 19 is connected with the sliding valve J by means of the connectingrod q, cross-head pin 1', cross-head s, valvestem N which works through the stuffing-box O and is fastened to the sliding valve J. The rocker-shaft M has secured at each end the side levers or arms, I? and 1?, which are connected by means of the pins 15 and t, connecting rods Q and Q, respectively, to the crosshead or yoke-pins u and a. It will be seen that by the arrangement of parts described the sliding valve J is operated by and moves in conjunction with the piston-rod H. The.

steam-chest G has mounted upon and secured to it the indicator-table R, on which are fastened the stops 1; and v.

The arrangement of the table and stops is such that the handle j, which moves directly over and which may have, if desired, frictional contact with the table R, is prevented from moving too far in either direction by the stops 1; and v. The table B may be marked with suitable divisions, which may represent in degrees or otherwise the exact position of the handle 3'.

To the eyebolt e is fastened the rope 2, which passes around the sheave 3, mounted on the support/1; then around the sheave 5,

mounted upon the support 6, and then to the tiller 7. to which it is secured in the usual man- To the eye'oolt e is fastened the rope 8, which passes around the sheave 9, mounted upon the support 10; then around the sheave 11, mounted upon the support 12, and then to the tiller 7, to which it is secured in the usual manner. The tiller 7 is secured to the rudder-post 13, through which it operates the rudder in the usual well-known manner. It will be seen that the movement of the rudder will be dependent upon the movement of the piston-rod H.

In Fig. 2 the extreme movements of the piston-rod, cross-head, or yoke Iis shown by small dotted circles 14 and 15. When the center of the crosshead or yoke I is in the position shown by the dotted circle 14,1116 rudder would assume the position as shown by dotted lines in Fig'.' 1 and designated 16, and when the center of the cross-head or yoke I is in the position shown by the dotted circle 15 the rudderwould assume the position as shown by dotted lines in Fig. l and designated 17.

By means of connecting devices between the handlej and the piston-valve K, as previously described,- if the handlej be moved toward the front cylinder-head, B, the piston-valve K will be moved in the same direction; As the piston-valve K advances, the piston-valve packings h uncover a portion of the port f, thereby allowing the steam which is admitted into the steam-chest G from a source of supply through the steam-supply pipe E to pass through the port f, recess f, and port 1) into the back end of the cylinder A. The piston-valve packings h, during the same advancing movement ofthe piston-valve K, uncover a portion of the port f, thereby allowing the steam in the front end of the cylinder to pass through the recess f and ports b and finto the space around the piston-valve K between the piston-valve packings h and h, which space is always in open connection with the exhaust-ports g, recess 9, and port 0, through the exhaust-port g, recess 9, and port 0 into the exhaust-pipe F. As the steam by these movements passes into the back end of the cylinder and exhausts from the front end, there will be created a differential pressure upon the piston G, which will tend to force the piston G forward, and if there is no special resistance to the forward movement of the piston-rod H it will move forward until the slide-valve J, which advances in the same direction as the piston G and is connected with it by the parts and in the manner already described, covers the ports f and f, that were opened by the advancing of the piston valve K. Whenever the piston-valve K is moved in either direction, the relative movements of the valves andtheir connections operate in the manner just described.

It will be seen that the movement of the piston G is always under the complete control of the operator by the proper moving of the handlej. It will also be seen that the piston G is ready at all times to exert a maximum force due to the steam-supply pressure multiplied by the area of the piston less the friction.

of the moving parts.

The stops 1] and a, secured to the indicatortable R, Figs. 1 and 2, are so located that when the handlej is stopped by the stop 12. if the piston G has too great a velocity-which may in practical use occur at any time for various causes-and does not. stop when the portsfand f are covered by the sliding valve J, then the movement of the sliding valve is such, being connected with the piston-rod H, as previously described, that it will uncover the portsf and f. The result of such opening of ports will be that the steam will exhaust from the back end of. the cylinder A and live steam will be admitted from the steam-chest G to the front end of the cylinder A. The result will be the effectual cushioning and stopping of the piston G, thereby entirely preventing the striking of the cylinder-head B by the piston G. If the handlej should be stopped by either of the stops 1) or v, the result would be the same so far as it relates to the controlling of the piston G. v

It will be seen that the power required to work the handle j is very small, only what is required to overcome the friction of the balanced pistonvalve K and its operating mechan1s1n.

The water in the cylinder, due to condensation of steam or carried into the cylinder mechanically by the steam, may be drawn off as often as necessary through ordinary pit-cocks or automatically by steam-traps properly connected; or, if found desirable, the cylinder or its valves, or both, can be so placed that the valves in operation will keep the cylinder free of water.

It is not absolutely necessary in our inven tion to adhere to the style of valve or valves shown and described, as other valves suitably made and arranged would be capable of performing the same duties with satisfactory results.

If deemed desirable or more convenient,wa-

ter or air instead of steam can be used as the power to be utilized.

Instead of the piston-rod being connected 0 at both ends with the tiller, one end only can be connected if more convenient.

WVhat we claim, and desire to secure by Letters Patent, is

The combination of thesteam-cylinder pro- 3 5 vided with inlet and exhaust ports, the steamchest, the slide-valve within the steam-chest controlling the ports of the steam-cylinder, the piston-valve within the steam-chest controlling the ports of the slide-valve, the head 40 K on the piston-valve rod, the actuatingspindle L, having the handlej, and the levers 7c and m, connecting said spindle with said head, substantially as described.

In testimony whereof we have signed our 5 names to this specification, in the presence of two subscribing witnesses, on this 4th day of March, A. D. 1886.

' LEVI WVILLIAM LOMBARD.

NATHANIEL LOMBARD.

Witnesses:

WILLIAM W. HADDOW, WALTER L. PERRY.