US569366A - wilkin - Google Patents

Description

(No ModeL) 3 Sheets-Sheet 1.

T. S. WILKIN.

VALVE.

No. 569,366. Patented Oct. 13, 1896.

' 3 Sheets-$heet 2. Mel) T. s. WILKIN.

VALVE.

No. 569,366. Patented Oct. 13, 1896.

I (No Mod l 3 Sheets-Sheet 3.

T. S. WILKIN.

VALVE.

No. 569,366. Patented Oct. 13, 1896.

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llNiTED STATES PATENT OEEicE.

THEODORE S. \VILKIN, OF MILIVAUKEE, IVISCONSIN, ASSIGNOR TO THE FILER & STOIVELL COMPANY, OF SAME PLACE.

VALVE.

SPECIFICATION forming part of Letters Patent No. 569,366, dated October 13, 1896.

Application filed January 13,1896. Serial No. 575,226. We model.)

To all whom it may concern.-

Be it known that I, THEODORE S. WILKIN, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Valves for Operating the Pistons of Steam- Cylinders, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

My invention has relation to improvements in valves.

Itis the object of the invention to provide for actuating the pistons of two cylinders by the employment of a single valve, said valve adapted to control the admission of steam to and its exhaust from these cylinders.

The device is found particularly useful in connection with log-canters. In the ordinary form of log-canters, in order to operate the piston so as to give the vertical and horizontal movements to the canter, at least two valves have heretofore been employed for the purpose.

The invention consists of the devices and parts or theirequivalents, as hereinafter more fully set forth and claimed.

In the accompanying drawings, Figure 1 is a half plan and half horizontal section of the valve-casin g and the valve therein. Fig. 2 is a central longitudinal vertical sectional view of Fig. 1. Fig. 3 is a transverse section on the line 3 3 of Fig. 2. Fig. at is a detail plan view of the valve. Fig. 5 is an elevation of the operating-lever. Fig. 6 is a view at right angles to Fig. 5. Fig. '7 is an elevation of a portion of one form of sawmill, illustrating my invention in connection therewith. Fig. 8 is a detail view of another form of universally-jointed lever, and Fig. 9 is a similar view to Fig. 7 of another form of sawmill with my valve mechanism applied thereto.

Like numerals of reference denote like parts throughout the several views.

Referring to the drawings, the numeral 7 indicates an outer casing which is provided with laterally-extending securing-flanges 8 8 and 8 S. The top surface of the casing is provided with a central steam-inlet opening or port 0, which is suitably connected to the source of steam supply. (Not shown.) On each side of the central steam-port are other openings or ports 1O 10, said openings connected by suitable pipes with one of the cylinders in which a piston is to be operated. The sides of the casing are provided with other openings or ports 11 11, to which are connected pipes adapted to conductsteam to and exhaust it from the other cylinder in which a piston is to be operated.

The end pieces of the casing are indicated by the numerals l2 and 13, which end pieces are secured to the casing by means of screws ll. The end piece 12 is provided with a tubular extension 15, through which a valvestem 16 passes, while leading from the end piece 13 is an exhaust-pipe 17. The casing has a circular bore throughout its length, in which the valve, hereinafter referred to, is adapted to be either rotated or reciprocated longitudinally. This circular bore communicates with the inlet 0 at the point 18, with the ports 10 at the points 15) 19, and with the ports 11 11 at the points 20.

The valve is indicated by the numeral 21. This valve is provided with the end annular enlargements 22 22. Between the end enlargements 22 and the central portion of the valve are formed recesses 24 2t. This central portion of the valve is provided at opposite points with the side cavities or recesses 26 26. At other points of the central portion of the valve are oppositely-arran ged cavities or recesses 27 27, which are connected by a small rectangular passage-way 28. The metal from the ends 22 22 of the valve is curved downward from the top and upward from the bottom, (the curved surfaces forming the recesses 2a 24.) These curved surfaces extend to and join parallel top and bottom walls 29 29 of the cavities or recesses 27 27, which walls form the front and rear chambers 30 30. These top and bot-tom walls merge into or join the walls forming the side recesses or cavities 26 26, so that said recesses are in communication with the chambers 30.

It will be understood that the ports or openings 10 10 control the admission of steam to and its exhaust from one of the cylinders on the longitudinal reciprocation of the valve, while the ports 11 11 control the admission of steam t) and its exhaust from the other cylinder on the rotation of the valve. If it is supposed that the valve is in the position illustrated in Fig. 3 of the drawings, there is a clear passage for the steam from the source of supply through the steam-inlet 9, through the opening 18, into the recess 27, and thence through the rectangular passageway 28 to the other recess 27, thereby completely filling up these spaces. If new the valve-rod is moved inward or toward the right of Figs. 1 and 2, the port 10 to the right is gradually opened up and the port 10 to the left opened to a greater extent. The steam therefore will havefree passage from the spaces 27 27 to the port 10 at the right, and will thence fiow through said port to the cylinder and thereby serve to actuate the piston within said cylinder, the steam back of the piston being forced through the connecting-pipe to the port 10 at the left. This exhaust-steam then passes from the front chamber 30 into the side cavities 26 26, to the rear chamber or space 30 at the right, where it is free to pass out of the exhaust-pipe 17. Of course on the outward movement of the valve-rod 16 a reverse operation takes place, that is, steam exhausts from the cylinder through the port 10 at the right and feeds to the cylinder through the port 10 to the left. It will be observed that the metal at the corners of the end enlargements 22 22 is cut away slightly, as indicated at 31 31, to permit a small quantity of steam to pass to the ports 10 1O somewhat sooner than it otherwise would, thereby forming steam-leads.

hen it is desired to operate the piston of the other cylinder, the ports 11 11 are controlled by the rotation of the valve. For the purpose of explaining this operation it will still be assumed that the valve is in the position illustrated in Fig. 3, and hence the steam entering through the port 9 fills the spaces 27 27. If now the valve be rotated to the right of Fig. 3 until the upper space 27 comes into register with the port 11 at the right, there will be a free passage of steam through the port 9, through the opening 18, into the space 27, and thence through the opening 20 into the port 11 to the cylinder, finally entering said cylinder and causing the piston therein to be moved in one direction. It will be understood that when the valve is rotated in the manner just explained the narrow side space 26 at the left of Fig. 3 is at the same time brought into register with the port 11 at the left, so that as the piston in the cylinder is made to advance in the manner just explained the steam back of said piston is forced through the pipe to the port 11 at the left, thence through the opening 20 to the side passage 26, and thence by way of said side passage to the rear communicating wider passage or chamber 30, Fig. 2, and finally out through the exhaust-pipe 17. When the valve is rotated in the opposite direction, of course a reverse operation takes place.

It will be seen that the lower cavity or restem outward.

is no chance for live steam to escape, (this live steam, as clearly shown, being confined in the spaces 27,) and consequently there is.

no necessity for providing a stuffing-box at the valve-stem end of the casing, the stem merely working in the tubular extension 15. The stem, however, is preferably provided with annular recesses 32, which in the event any of the exhaust-steam should enter the tubular extension will catch the water of condensation from said steam, and being filled with said water will thereby serve as a waterpacking for the valve-stem.

In Figs. 5 and 6 I show the manner of imparting to the valve-stein 16 either a rotary or a longitudinally-reciprocating motion. It will be soon that the valvestem runs through a bearing-block 33, secured to the upper side of the beam 34. Mounted loosely on the end of the stem which projects beyond the hearing is a yoke 35.

The numeral 36 indicates an operatinglever, which is provided medially with a ball 37, said ball fitting in a socket of a fixed plate 38. Between this plate and a nut or shoulder 39 on the lever is a coiled spring 40. The lower portion of the operating-lever is formed of two links 41 41, between the upper ends of which is located a block 42, which block is pivotally secured therebetween by a pin 43. The lower end of the upper portion of the operating-lever 36 is bifurcated, the fur cated parts straddling the block 42 and pivoted thereto by means of a pivot-pin 44. About centrally between the links 41 is arranged another block 45, through which the end of the valve-stem passes, being held rigidly in the aperture of the block. This block is held in place by means of a transverse pin 46. The ends of the yoke 35 pass between the links 42 42, as clearly shown, the lower end having a pin 47 passing therethrough, the ends of said pin being seated in elongated slots 48 48 at the lower ends of the links.

In the operation of the lever, if the upper end is pushed inward toward the bearing 33 its lower end will turn with the block 42 on the pivot 43, thereby throwing the upper ends of the links outward from the bearing 33. As the valve-stem 16 is held rigidly in the block 45, this will necessarily pull the valve- In order to force the valvestem 16 longitudinally in the opposite direc IIO tion, all that is necessary is to bring the operating-lever 36 back to the normal position illustrated in Fig. 6.

hen it is desired to rotate the valve-stem 16, the operating-lever is turned at right angles to the direction in which it was before operated. This has the effect of turning the lower end of the lever 36 on the pivot-pin 44, thereby, through the block 45, rotating the valve-stem 16, which rotation may of course be given in either direction by the proper turning of the operating-lever. It will thus be seen that by providing a universally-jointed lever for operating the valve-stem, carrying the single valve, said valve may be operated in all directions, whereby the pistons of the two cylinders may be controlled independently, so as to supply live steam to one and at the same time exhaust therefrom, while the piston of the other cylinder remains inactive, or, vice versa, live steam is admitted to the other cylinder and exhausted therefrom during the inactivity of the other, or live steam is admitted simultaneously to both cylinders and exhausted therefrom.

Sheets 2 and 3 of the drawings illustrate the application of my improved valve to different types of log-canters. Sheet 2 illustrates the application of my improved valve mechanism in connection with a log-turner such as that shown, described, and claimed in my Letters Patent No. 415,315, dated November 19, 1889. The numeral 32 indicates the floor of the mill, 33 the sawmill-carriage traveling thereon, and 34 the logway. 35 indicates the horizontally-mounted cylinder, and 36 the upright cylinder, to the pistonrod 87 of which the lower end of the toothed bar or canter 38 is pivoted. The piston-rod 39 of the horizontal cylinder is provided with an end block or frame i0, which is adapted to receive and guide the bar 38.

The above parts are fully described in the patent referred to, and hence require no specific description herein. The application of my improved valve thereto will now be described.

Running from the side ports 11 11 are pipes 11" 41", which lead to opposite ends of the cylinder 35, while pipes 42 42 run from the ports 10 10 to opposite ends of the upright cylinder 36. It is obvious that when it is desired to roll the log upon the carriage all that is necessary to be done is to move the universally-jointed lever in a line with the logway in the proper direction to admit steam to the end of the cylinder 35 nearest the sawmill-carriage. This will of course cause the piston-rod 39 to move into the cylinder, and as it thus moves it retracts the block or frame 10 and also the upper end of the bar or canter 38". As soon as the bar 38 has assumed the desired inclination the operating-lever is then moved at right angles to its first line of movement and in the proper direction to admit steam to the lower-end of the cylinder 36, the steam thus admitted serving to move the bar 38 vertically, so that it will project upward behind the log in the logway. If the lever be now moved in a path of motion parallel to the logway, but in areverse direction to its first movement, so as to admit steam to the rear end of the cylinder 35, the 'upper end of the bar 38"will be carried forward, so as to roll the log over the logway onto the carriage.

If it is desired to move both the piston- rods 37 and 39 simultaneously, the operating-lever is actuated so that its line of movement is anywhere between the lines of movement of the lever first described.

The universal joint of the operating-lever, it is obvious, may be of any desired construction. On Sheet 1 is shown one form which I may employ, and on Sheet 2 another form which may be used to advantage: This latter construction is shown in Fig. 8, in which figure the operating-lever is indicated by the numeral 36". The valve stem 16 passes through the lower eye of a casting 4-3, while a short pin or bolt passes through the upper eye of this casting, said pin or bolt receiving pivotally upon its opposite ends the bifurcated lower end of an arm 45, to the upper end of which arm is pivotally secured on a pin or bolt 46, at right angles to the pin 44, the lower end of the operating-lever 36. The operating-lever is provided with a similar ball-and-socket connection to that shown in Figs. 5 and 6. From the construction just explained it will be seen that when the operatinglever is pushed toward or from the valve-casing 7 said lever will turn upon the pin or bolt 46, and consequently move the valve-stem 16 longitudinally, while if moved at right angles to the movement just described it will turn on the pin or bolt 44 and have the effect of rotatin g the valve-stem 16.

In the other application of my improved valve mechanism illustrated in Fig. 9 of Sheet 3 of the drawings two upright cylinders 47 47 are employed, to the opposite ends of which, respectively, the pipes 41' 41 and 42 42 extend from the ports of the valve-casing 7. The lower branches of the log-canter 38 connect to the piston-rods 48 18 of the cylinders.

Besides the applications of my improved valve herein illustrated, it is obvious that it can be successfully applied to many different arrangements of cylinders for operating logcanters and for analogous purposes.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. The combination of a casing having a steam inlet and exhaust, and provided with a set of ports leading to one cylinder, and a second set of ports leading to another cylinder, a single valve within the casing, and means for actuating this valve in different directions, whereby said valve is made, respectively, to admit steam to and exhaust from one cylinder, while the other cylinder is closed against the admission of steam, to admit to and exhaust steam from said other cylinder while the first-named cylinder remains inactive, or to admit steam to and exhaust from both cylinders simultaneously, whereby the pistons within the cylinders are made to operate either alternately or simultaneously, substantially as set forth.

2. The combination, of a casing having a steam inlet and exhaust, and provided with a set of ports leading to one cylinder, and a second set of ports leading to another cylinder, a single valve within the casing, and a universallyjointed lever for actuating the valve in different directions, whereby said valve is made, respectively to admit steam to and exhaust from one cylinder while the other cylinder is closed against the admission of steam, to admit to and exhaust steam from said other cylinder, while the first-named cylinder remains inactive, or to admit steam to and exhaust from both cylinders simultaneously, whereby the pistons within the cylinders are made either to operate alternately or simultaneously, substantially as set forth.

3. The combination of a casing having a steam inlet and exhaust, and provided with ports adapted to be connected to a steam-cylinder, a valve within the casing, the ends of which are adapted to regulate the openings or ports leading to the cylinder, said valve provided with a central cavity or recess adapted to register with the steam-inlet, and side and end communicating passages closed from the central cavity or recess, said communicating passages leading to the exhaust-opening of the casing, and means for reciprocating the valve longitudinally, whereby, when reciprocated in either direction, one of the ports leading to the cylinder is brought into open communication with the central cavity or recess of the valve to admit live steam to the cylinder, while the other port in communication with the cylinder is brought into open communication with the passages leading to the exhaust from the casing, to allow a free passage of the exhaust-steam from the cylinder to said exhaust-opening of the casing, substantially as set forth.

4. The combination, of a casing having a steam inlet and exhaust and provided with ports adapted to be connected to a steamcylinder, a valve within the casing, said valve provided with a central cavity or recess adapted to register with the steam-inlet, and also with communicating front, rear and side passages closed from the central cavity or recess, and leading to the exhaust of the easing, and means for rotating the valve, whereby, when rotated in either direction, one of the ports leading to the cylinder is brought into open communication with the central cavity or recess of the valve, to admit live steam to the cylinder, while the other port in communication with the cylinder is brought into open communication with the passages leading to the exhaust from the casing, to

allow a tree passage of the exhaust-steam from the cylinder to said exhaust-opening of the casing, substantially as set forth.

5. In a valve for operating the pistons of steam-cylinders, the combination, of a cas ing having a steam inlet and exhaust, and provided with a set of ports leading to one cylinder, and a second set of ports leading to another cylinder, a valve within the easing, the ends of the valve adapted to regulate the openings or ports leading to one cylinder, said valve provided with a central cavity or recess adapted to register with the steam-inlet, and side and end communicating passages closed from the central cavity or recess, said communicating passages leading to the exhaust-opening of the casing, and means for either reciprocating longitudinally or rotating the valve, whereby, when reciprocated longitudinally in either direction, one of the ports leading to the cylinder is brought into open communication with the central cavity or recess of the valve, to admit live steam to the cylinder,while the other port in communication with the cylinder is brought into open communication with the passages leading to the exhaust from the easing, to allow for a free passage for the exhauststeam from the cylinder to said exhaust-opening of the casing, and the valve when rotated in either direction, adapted to bring one of the ports of the other set leading to the cylinder into open communication with the central cavity or recess of the valve, to admit live steam to the cylinder, while the other port in communication with said cylinder is brought in to open communication with the passages lea-ding to the exhaust from the casing, to allow a free passage for the exhaust-steam from the cylinder to said exhaustopening of the casing, substantially as set forth.

6. The combination, of a casing having a steam inlet and exhaust, and provided with ports adapted to be connected to a steam-cylinder, and with annular grooves leading to said ports, a valve within the casing, the ends of which are adapted to regulate the openings or ports leading to the cylinder, said valve provided with opposite cavities, communicating with each other by an opening, one of said cavities adapted to register with the steam-inlet, and side and end communicating passages closed from the central cavity or recess, said communicating passages leading to the exhaust-opening of the casing, and means for reciprocating the valve longitudir nally, whereby, when reciprocated in either direction, one of the ports leading to the cylinder is brought into open communication with the cavity of the valve which receives steam direct from the inlet, to admit live steam to the cylinder, and the opposite cavity of the valve is brought into communication with the annular groove, while the other port in communication with the cylinder is brought into open communication with the IIO pivot-pin at right angles to the other pivot, said pin pivotally connecting the upper end of the arm with the lower end of the operating-lever, substantially as set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

THEODORE S. \VILKIN.

itnesses:

ANNA V. FAUST, ARTHUR L. MoRsELL.

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