US1120994A

US1120994A - Valve-operating mechanism for steam-engines.

Info

Publication number: US1120994A
Application number: US66508911A
Authority: US
Inventors: William H Bates
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-12-11
Filing date: 1911-12-11
Publication date: 1914-12-15
Anticipated expiration: 1931-12-15

Description

* W. H. BATES. .VALVE OPERATING MECHANISM FOR STEAM ENGINES.

APPLIUATIQN FILED DEC.. 11, 1911.

Patnted Dec. 15, 1914.

W. H. BATES.

VALVE @PERATING MEGHANlsM P011 STEAM ENGINES.

APPLICATION FILED DEC.11.1911.

Patenteanec. 15,1914.

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VALVE OPERATING MECHANISM PoE STEAM ENGINES.

ABPLIGATION PTLBD 11120.11, 1911.

Patented Dec. 15, 1914.

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W. H. BATES. VALVE OPERATING MEGHANISM POR STEAM ENGINES.`

APPLICATION'FILED DEC.11.1911.

1,120,994. Patented Deo. 1.5, 1914.

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VILLIATII BATES, C?? C-CAGG, ILLINOIS.

VALVE-OPERATING IVIAECHANISM FOR STEAM-ENGINES.

Application led December 11, 1911.

To all 'whom t may concern.' Y

Be it known that I, `WILLIAM H. BATES, a citizen of the United States, residing at Chicago, in the county of Cook and Staterof Illinois, have invented certain new and useful Improvements in Valve- Operating Mechanism for Steam-Engines, of which the following is a description.

My invention belongs to that general class of devices known as steam engines or the like, and relates particularly to an improved centralized valve'gear or operating mechanism.

The device is particularly intended for use on horizontal marine engines, wherein the crank shaft is usually placed at some distance from the cross-head, and a comparatively long connecting rod employed. Vith engines of this type the eccentric rod for operating the valve mechanism ordinarily extends to the crank shaft. With my improved construction only the connecting rod extends to the crank shaft, and a comparatively short rod for operating the valve mechanism is employed, the usual eccentric rods, cams and links being eliminated.

The present invention is also an improvement over the engine shown in Letters Patent of the United States No. 7 38,147 Vdated September 8, 1903, issued to myself and Robert C. Douglas for a variable cut-oif for steam engines, and includes an improved mechanism for operating the rod, which operates the supplemental valve mechanism.

My invention also has further among itsr objects the production of an engine of the kind described that is simple, durable, compact, eiiicient and satisfactory.

rlhe invention is particularly suitable for horizontal long stroke marine engines of the type shown and described, but its use, however, is not confined to such engines, as it may be used wherever found applicable.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and. described, and more clearly pointed out in the claims.

' 1n the drawings, wherein likev reference characters indicate like or corresponding parts, Figure 1 is a. top plan view ofa portion of the engine, showing the cross-head and guides therefor, and my improved main and supplemental valve operating mechanism.' Fig. 2 is a side elevation of one side of the engine, showing a portion of the Speccaton of Letters Patent.

Patented Dec. 15, 1914.

eral No. 665,089.

mechanism for operating the main valve. Fig 3 is a side elevation of the opposite side of the same, showing the mechanism for operating the supplemental valve mecha-r nism. Fig. 4 is a sectional View taken substantially online 4, 4 of Fig, 2, and Fig. 5 is a side elevation of the engine cylinder of a horizontal marineengine, showing a portion of the Variable cut-off mechanism similar tothat described in the patent previouslyy mentioned.

Referring to the drawings, it may be mentioned, in order that the device may be more clearly understood, that Fig. 5 is substantially a continuation of Fig. 8 from line a, a, and that only a portion of the connecting rod 6 is shown, the remainder of the connecting rod, the crank shaft, etc., being omitted from the drawings, as the same is preferably the usual and well known construction. The type of engine illustrated is similar to that described in the patentpreviously mentioned, and consists of a suitable frame or bed 1, upon which is mounted a cylinder 2, from which is extended the right piston rod 3, which is connected with the cross-head 4 arranged to slide upon the crosshead guides 5. 1t is also unnecessary to go into details as to the particular construction of the valve mechanism other than to say that the main valve is operated by the valve stem 10, and the supplemental valves, which afford an adjustable variable cut-o, are op- 1 erated by the rod 11, connected to a plate 12 pivotally mounted on a shaft 13,'the sup-y plemental valve mechanism being operated bythe rod 11and the regulation being controlled as described in the above mentioned patent. n

As previously mentioned, in the present construction he eccentric rods to the crank shaft cams, etc., usually employed, are omitted. 1n place of the eccentric rod I arrange a rod 15, preferably in proximity to the crossshead guides 5, and extending along the same. rhe rod 15 is pivotally secured at one end at 1G to an arm 17, which is pivotally carried by a shaft or pin 19, carried by the bearingbracket 20. The opposite end of the rod 15 is pivotally secured at 22 to anarm 21, which is pivotally carried byv` a pin 25, supported by the bearing bracket 24. In the preferred construction, .provide armslS and 2G, which form substantially bell cranks withthe arms'17 and 21 andconnect the free ends of the armslS and 26 by a rod 28 27 and 29.

To one of the shafts or pins 25 or 19, preferably to the shaft 25, 1 secure an arm 31. The arm 31 is pivotally connected at 33 to a rod 32, which is preferably connected by a suitable reversing gear to the stem 10. r1`he type of reversing gear shown is well known and comprises a saw-buck 35, having its central portion arranged between two pins 3S and 39, carried by a part 37 on a rotatable rock shaft 36. To maintain the parts in position, the plate or bar 40 (see Fig. 4) is preferably arranged at the ends of the

bolts

38 and 39. The vertical position or adjustment of the saw-buck 35 is controlled by a rod 45 extending therefrom, which may be raised or lowered by a rod 46, so that as the rod 46 is raised or lowered, the saw-buck part 35 is raised or lowered to engage the upper pin 38, or the lower pin 39, as may be desired. Shifting the parts as described of course changes the direction of rocking of shaft 36 relative to the travel of the piston. The regular shaft 36 is preferably extended upwardly to form a bracket 47. A rod 48 is pivotally connected at 49 (see Fig. 4) the rod 48 being suitably connected tothe main valve rod 10 (see Figs. 1 and 5).

Secured to the connecting rod 6, is a bracket 51, which carries a part 52 pivotally secured Vto the bracket at 53, the part 52 being adapted to slide back and forth on the rod 15 as the'connecting rod is operated. As the engine is driven, the bracket 51 is recip rocated, drawing down the rod 15 over the guides at one end, as shown at the crank end, as the piston moves forward, and rais-1 ing the opposite end as it is reciprocated back toward the piston or cylinder. Drawing down and raising the ends of the rod 15 as the piston reciprocates back and forth,

operates the valve rod 10, the movement ofv the bar or rod l5 beingv communicated through the bell crank 21, shaft 25, arm 31 and rod 32, saw-buck 35, one of the pins on the bars 37, bar 37, rock shaft 36, arm 47, the connecting rod 48, thereby operating the main valve to perform its usual functions. )Vith this construction it is not necessary to extend a rod to the crank shaft (not shown). For this reason the engine is particularly applicable for marine use in driving stern propellers or wheels, where a long stroke en-V gine with a long connecting rod is usually used.

The mechanism for operating the supplemental valve mechanism is substantiallysimilar in construction, and comprisesa rod 56 (see Figs. l, 3 and 4) which is pivotally supported at and 58 from the arms 59 and 57. The arm 57 is preferably loosely mounted upon the shaft 36, and is provided with an extending or bell crank arm 63, to which is pivotally secured at 64 a'supplepivotally secured to the arms Ving bellV crank arm 65.

mental valve operating rod 11. The arm 59 is pivotally supported at 61 from a bearing bracket 62, and is provided with an extend- The arm 63 and arm 65 are tied together by a rod 66, pivotally secured to the arms at 64 and 67 respectively. f

Carried by the cross head 4 is an extended arm 68 provided with a bearing box or plate 69, which embraces the rod 66, the part 68 being preferably secured at 70 of the cross head. The operation of this mechanism is substantially similar to that previously described for operating the main valve. As the cross-head is reciprocated back and forth, the rod56 is operated so as to operate or rock the arm 57, thereby rocking the arm 63 and operating the supplemental valve operating rodll. Operating the rod 11 rocks the plate 12 (see Fig. 5) which, in turn, controls the supplemental valve mechanism in the manner described in the patent previously mentioned.

It is, of course, understood that either one or both the mechanisms described for both valve mechanisms may be employed, or that the same may be employed for operating only one of the mechanisms. I do not wish to be understood as limiting myself to the use ofthe construction embodying a variable cut-olf, inasmuch as the same may be used wherever found applicable; neither do I wish to be understood as limiting the use of the same to a horizontal marine engine of the type mentioned. The advantages of this construction, particularly when applied to a horizontal marine engine of the type described, are many. Eccentric rods, cams, links, etc., are eliminated, removing the diiiiculty often experienced in the'breaking of these parts, lespecially on boats operated in shallow riversor waters, where overhanging limbs of trees, etc., are liable to come in contact with the parts. The valve gear is in plainV sight of the engineer and accessible without going outside of the boat, and the room usually taken up on the crank shaft by eccentrics, cams and the like, allows just that much more space for the paddle wheels, so that longer'lengths of paddle wheels may be used. Y

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departing from the spirit of my invention, hence 1 do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

What 1 claim as new and desire to secure by Letters Patent is 1. 1n a valve operating mechanism, the combination with a Vvalve and a reciprocating engine part, of valve gear including a longitudinally and transversely movable bar disposed longitudinally with relation to the direction oit' movement of said reciprocating part, means for operatively connecting said bar with said reciprocating part whereby said bar is actuated, and an oper* ative connection between said bar and valve.

2. In a. valve operating mechanism, the combination with a valve and a reciprocating engine part, of valve gear including a longitudinally and transversely movable bar disposed longitudinally with relation to the direction of movement of said reciprocating part, means pivotally connected with the reciprocating part and slidably connected with the bar to actuate the same, and an operative connection between said bar and valve.

8. The combination in a steam engine including valve mechanism, a reciprocating piston rod, cross head and connecting rod, of a longitudinally and transversely movable bar disposed longitudinally with relation to said rods, supporting means for the bar comprising a pair of pivotally supported arms connected to the end of the bar, means for connecting one of said arms` to the valve mechanism, and means carried by the cross head and movable along the bar for actuating the same.

4. The combination in a steam engine including valve mechanism, a piston rod, cross head, and a connecting rod, of a longitudinally and transversely movable bar disposed longitudinally with relation to said rods, supporting means for said bar including a plurality of pivotally supported arms,said arms being pivotally connected to saidbar, means for pivotally and slidably connecting the bar with one of the reciprocating parts of the engine, said means comprising a member pivotally connected to one of said engine pants and slidably connected with said bar, and' means for transmitting the movement oi said bar to the valve mechanism.

5. The combination in a steam engine including valve mechanism, a reciprocating piston rod, cross head and connecting rod, of a longitudinally and transversely movable bar arranged substantially parallel with said rods, a pair of brackets carried by the bed of the engine, a, 4pair of arms pivotally carried by said brackets and pivotally connected at their free ends with the bar, one of said arms being provided with an arm extending therefrom and forming a bell crank, means for operatively connecting the last mentioned arm with the valve mechanism, and means operatively connecting the bar with one of the reciprocating parts of the engine.

6. A. valve operating mechanism for steam engines comprising a horizontally inclined mechanisimand a reciprocating part carried by one of the reciprocating parts of the engine, and slidable along the said bar to actuate the same. f

7. The combinationwith a steam engine including valvemechanism, a reciprocating .piston rod, a cross head and connecting rod,

of a horizontally inclined longitudinally and transversely movable bar disposed longitudinally with relationto said rods, means for supporting said bar, comprising a plurality of pivotally supported arms pivotally connected with the bar, one of said arms being provided with a bell crank, and a connection between said bell crank and the valve rod.

8. The combination of a steam engine provided with main and supplemental valve mechanisms, a reciprocating piston rod, cross head and connecting rod, of operating mechanism for said valves including ay pair of longitudinally and transversely movable bars disposed longitudinally with relation to said rods, means for supporting said bars, means for connecting one of said bars to the main valve mechanism, means for connecting the other bar to the supplementalvalve mechanism, means connected with the engine connecting rod for operating one of the bars, and means connected with the engine cross head for operating the other bar. n

9. The combination with a steam engine including main and supplemental valve mechanisms, a reciprocating piston rod, cross head and connecting rod, of operating mechanism for said valves, including a pair of ylongitudinally and 'transversely movable bars disposed longitudinally with relation to said rods, means for supporting said bars, means for adjustably connecting one of said bars to the main valve mechanism, means forv adjustably connecting the other bar to the supplemental valve mechanism, means ior operating said bars comprising a member pivotally secured to the connecting rod of the engine and slidably mounted on the iirst mentioned bar, and a member pivot,- ally connected with the engine cross head and slidably engaging the other bar.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIAM H. BATES.

litnesses W. S. BARNES, S. E. Inyrnsn Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C,