US1018047A - Combined throttle and reversing valve. - Google Patents

Description

. A. HACKETT.

COMBINED THROTTLE AND REVERSING VALVE. APPLICATION FILED MAY 13, 1911.

' Patnted F8b.20, 1912.

m .C-l 1\ 4 5 i s W- UNITED STATES PATENT OFFICE.

ALFRED HACKETT, OF TORONTO, ONTARIO, CANADA.

COMBINED THROTTLE AND REVERSING VALVE.

To all whom it may concern:

Be it known that I, ALFRED HAOKETT, a subject of the King of Great Britain, residing at the city of Toronto, in the county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in Combined Throttle and Reversing Valves for Motors, of which the following is a specification.

My invention relates to improvements in combined throttle and reversing valves for motors, and the objects of my invention are firstly: to provide a valve for the purpose set forth whereby with the use of a single throttle lever, and eccentric-rod, the motor or final mover may be set in motion to any extent; checked at intermediate points, and also readily reversed; secondly: to design a type of valve which will dispense with the disadvantages resulting from the great friction present in connection with the use of the ordinary D slide-valve; thirdly: to provide means for adjusting the valves in my device, each in its seat, so that while insuring snug fit thereof, they will be prevented from jamming, and my preferred form of valve consists of two valves mounted in a valvecasing, the first valve controlling the passage and path of the steam, and the second valve performing the function of the ordinary slide-valve in respect of controlling the ingress and egress of the steam with respect to the cylinder. Each valve is divided into two separated compartments, each compartment having one or more ports which co-act with ports formed in the valve casing. A throttlelever is provided for operating the first-mentioned valve and an eccentric-rod for the secondmentioned valve, as hereinafter particularly explained.

Figure 1 is a plan view of my valve. Fig. 2 is a vertical longitudinal section on the line ab, Fig. 1, looking in the direction in dicated by arrow with plain tail. Fig. 3 is a vertical longitudinal section on the line a-5, Fig. 1, looking in the direction indicated by arrow with crossed tail. Fig. 4: is a vertical transverse section on the line ccZ, Fig. 1. Fig. 5 is a side elevation of the reversingvalve. Fig. 6 is a transverse section on the line e Fig. 4, on a reduced scale, through the lower portion of the reversing-valve and its seat, and Figs. 7 and 8 are perspective views of the distributing valve operated by the eccentric-rod.

In the drawings, like characters of refer- Specification of Letters Patent.

Application filed May 13, 1911.

Patented Feb. 20, 1912. Serial No. 626,943.

ence indicate corresponding parts in each 1 figure.

It will of course be understood by one skilled in this art that the ports in the distributingvalve and its seat are so placed in order to have the usual co-act-ion so as to;

give a correct distribution of the steam to and from the cylinder.

A is the valve-casing provided with a chamber B having intake and exhaust ports C and D. Mounted to operate within cham-" A. and in which operates the distributingvalve J. The distributing-valve J is divided into two separate chambers K and L by a partition M. The inner end of each port C and D is flared as shown particularly at 2, Fig. 1, and at the outset it must be under stood that the ports in the reversing-valve E will always each be in communication with its respective inner end of the said ports C and D.

For the purpose of illustrating the operation of my valve, we will suppose that the port 3 in the valve E (see Fig. 6) has been moved into alinement with the port 4 in the valve-casing A by the movement of the valve E through the medium of its throttle-lever N. The chamber F is always full of live steam because the range of movement of the port 3 is always such as to keep this port in communicative position with respect of the inner end of the intake port C. Now the steam escapes from'the port 4 through the port 5 into the chamber L, and as the port 6 of the valve J is in communication with the port 7 formed in the base 0 of the valvecasing A, and with the port P formed in the valve-seat Q, the steam escapes through these ports into the cylinder 8 through the port 9, and so operates the piston 10. When the ports 6 and 7 are open, the exhaust port 11 formed in the valve J opens into the exhaust port 12 (see Fig. 3) formed in the base 0 and the port R formed in the valve-seat Q, and consequently any steam there may be in the cylinder 8 in front of the piston 10 escapes through the port 18 into the exhaust ports 12 and R, through the port 11 into the chamber K, thence from this chamber through the exhaust port 13 into the exhaust port 14 whence it escapes into the chamber G of the valve E. When the port 3 was moved to open into the port 4, the port 15 of the valve E was moved to communicate with the port 14, and therefore free exhaust is had from the chamber G through the port 15 into the exhaust port D. In due course, the eccentric-rod 1G, controlling the movement of the distributing-valve J, will have been separated so as to bring the port 17 of the valve J, into communication with the port 18 formed in the base 0. The port 17 opens into the chamber L of the valve J which is filled with live-steam, consequently the live-steam escapes into the cylinder 8 through the ports 18, a, and 19 and so drives the piston from dotted position back into the position illustrated in full lines. Of course as the ports 17 and 18 are opening, the ports 6 and 7 and 11 and 12 are closing. The steam in front of the piston 10, as it moves from dotted position, escapes through the exhaust-port 20 into the exhaustports b and 21, and as the exhaust-port 22 in the valve J has been moved to communicate with the exhaust-port 21, the steam escapes into the chamber K thence through the exhaust-port 13 into the exhaust 14 to the chamber G, whence it escapes through the exhaust-port 15 into the exhaust-port D. Now in order to reverse the engine, the valve E is operated so as to bring the port 3 into communication with the port 23, and the port 15 into communication with the port 24. The live steam passes through the ports 23, and 13 into the chamber K, and as the port 22 is supposed to open into the ports 21 and Z), the steam escapes from the port 20 and acts on the piston 10. When the ports 21 and 22 are open, the port 17 communicates with the ports 13, a and 19, and consequently the exhaust steam escapes through these ports 'into the chamber L and thence through the port 5 to the port 24 and from this port through the port 15, the chamber G and thence from the port 15 to the exhaust port I). So soon as the piston has reached the limit of its described movement, the port 11 communicates with the ports 12, R and 13, thus allowing live steam to escape into the cylinder 8 through these ports from the chamber K and act against the piston. When the port 11 communicates with the ports 12 and R, the port 6 is in communication with the ports 7, P and 9, and consequently the exhaust steam escapes from these ports into the chamber L through the port 5 into the port 24 and through these ports to the port 15 into the chamber Gr whence it escapes through the port 15 to the exhaust port D. It will be understood that at all times the chamber F of the valve E receives the live steam, and that the chamber G of this valve receives the exhaust steam.

The eccentric-rod 16 is connected by a lever 16 with the stem 16 of the valve J. The valve J is tapered as shown as well as the walls of the chamber 1: this construction enables me to provide a snug fit for this valve. Surrounding the valve-stem 16 is a coiled-spring 25, which is held between the cap 26 and one end of the valve J so as to hold said valve on its seat. In order to prevent the valve from jamming, I provide the following construction. Screwing through the cap 27 (secured by the screws 28 or other suitable means to the valve-casing) is a threaded-stud 29, which contacts with a block 30 held in a recess formed in the outer surface of the end 31 of the valve J. Screwing on the stud 29 is a nut 32 which locks this stud in its adjusted position. By means of the spring 25 and its associated parts, the valve J is held snugly in its scat. By screws 33 or other suitable means, the cap 26 is secured to the valvecasing. The valve E is also tapered, as well as the walls of the chamber B. The partition H is longitudinally provided with a bore 34 through the axis of the valve E. The upper end of the valve E is provided' with a sleeve 35 internally threaded through which passes a stud 36 which is threaded at its upper end to co-act with the threaded sleeve This stud 36 projects beyond the bottom of the valve E and rests against a block 37 held in a cavity formed in the bottom of the chamber B. Vithout further description it will. be understood that by reason of the co-action between the stud 36 and block 37 while the valve E will snugly fit its seat, still it will be prevented from jamming thereagainst.

38 is a cap secured by any suitable means, such as screws 39, to the top of the valvecasing A above the top of the valve E.

Surrounding the sleeve 35 and resting against the valve E and housed by the cap 38, is a spring 40 which keeps this valve spring-held against its seat.

The inner end 41 of the throttle-lever N is secured by a screw 42, or other suitable means, to the top of the sleeve 35.

43 and 44 are pins or stops preferably carried by the cap 38 with which the throttle-lever N is thrown into contact. hen the port 3 opens into the port 4, the lever N will be in contact with the pin or stop 43; and when the port 3 communicates with the port 23, the lever N will be in contact with the stop or pin 44.

Upon referring particularly to Fig. 6, it will be seen that in the position of the valve E therein illustrated, the engine is throttled: only when the port 3 communicates with either of the ports 4 and 23 is steam allowed to pass into the cylinder. It is therefore evident that by means of the valve E perfect control is had over the movement of the steam engine.

The ports 5 and 13 are always in communication with the ports co-acting therewith formed in the valve-casing A. In respect of the ports 6, 7, 11 and 12, illustrated in Fig. 1, the ports in the valve J are shown larger than the ports in the valve-seat or 5 base merely for the purpose of illustration, as will be understood.

It is now clear to one skilled in this art that the chambers K and L at different times receive live steam and exhaust steam 0 according to the direction of movement of the engine. 1

While I have described what I consider to be the best embodiment of my invention, I desire it to be understood that I do not confine myself to the construction herein shown and described, except in so far as that may be made necessary by the requirements of the prior art and the terms of my claims.

Upon referring particularly to Figs. 1, 7,

o and 8, it will be noticed that'the ports 6 and 17 of the valve J are closer together than the ports 11 and 22, and that these pairs of ports coact respectively with the ports 7 and 18 and 12 and 21 formed in the base 0. The ports 7 and 18 are farther apart than the ports 12 and 21. The ports 7 and 18 arefarther apart than the ports 6 and 17, and the ports 12 and 21 are closer together than the ports 11 and 22. During move- 0 ment of the distributing-valve J, it will be noticed upon referring particularly to Fig. 1, that the ports 6 and 17, when closed, are positioned bet-ween the ports 7 and 18, and that the ports 11 and 22 are, when closed, positioned outside of the space separating the ports 12 and 21'. In this disclosure of my invention, the said ports are placed as described as to give me the desired co-action therebetween.

0 IVhat I claim as my invention is 1. A valve of the class described comprising a valve-casing provided with a first chamber provided with intake and exhaust ports, and further provided with a second- 5 chamber connected with the first-mentioned chamber by a pair of live-steam ports and a pair of exhaust-steam ports; a reversing valve mounted in the first-mentioned chamher; a partition dividing this valve into two 0 separate chambers each of which is provided with a port; a distributing-valve mounted within said second-mentioned chamber; a

partition dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-acts with its respective pair of said livesteam and exhaust-steam ports, and the said chambers being further each provided with a pair of ports which co-act with ports in said 0 valve-casing whereby the ingress and egress of steam to and from acylinder is controlled, as and for the purpose specified.

2. A valve of the class described comprising a valve-casing provided with a first-- 5 chamber provided with intake and exhaust ports, and further provided with a secondchamber connected with the first-mentioned chamber by a pair of live-steam and a pair of exhaust-steam ports, the ends of which opening into the first-mentioned chamber are spaced apart; a reversing valve mounted in the first-mentioned chamber; a partition dividing this valve into two separate chambers each of which is provided with a port which operate respectively between the ends of the said live-steam and exhaust-steam ports opening into the first-mentioned chamber, for the purpose set forth; a distributingvalve mounted within said second-mentioned chamber; a partition dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-acts with its respective pair of said livesteam and exhaust-steam ports, and the said chambers being further each provided with a pair of ports which co-act with ports in said valve-casing whereby the ingress and egress of steam to and from a cylinder is controlled, as and for the purpose specified.

3. A valve of the class described comprising a valve-casing provided with a firstchamber provided with intake and exhaust ports, the inner end of each of which is flared as described, and further provided with a second-chamber connected with the first-mentioned chamber by a pair of livesteam and a pair of exhaust-steam ports; a reversing valve mounted in the first-mentioned chamber; a partition dividing this valve into two separate chambers each of which is provided with a port; means for limiting the range of movement of said valve so that the live-steam chamber thereof will always be in communication with said intake-port, and the exhaust steam chamber thereof will always be in com munication with said exhaust port; a distributing valve mounted within said secondmentioned chamber; a partition dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-act with its respective pair of said live-steam and exhaust-steam ports, and the said chambers being further each provided with a pair of ports which co-act with ports in said valve casing whereby the ingress and egress of steam to and. from the cylinder is controlled, as and for the purpose specified.

4. A valve of the class described comprising a valve-casing provided with a firstchamber provided near its upper end with intake and exhaust ports, the inner end of each of which is flared, as described, and further provided with a second-chamber connected with the first-mentioned chamber by a pair of live-steam ports and a pair of exhaust-steam ports, the upper ends of which open into the first-mentioned chamber near the bottom thereof and are spaced apart; a reversing valve mounted in the first-mentioned chamber; a partition dividing this valve into two separate chambers each of which is provided with a port, means for limiting the range of movement of said valve so that'the ports opening from the said chambers thereof can be made to register at will with the desired one of the said live-steam, and the desired one of said exhaust-steam ports; a distributing-valve mounted within said second mentioned chamber; a partition. dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-acts with its respective pair of said livesteam and exhaust-steal'n ports, and the said chambers being further each provided with a pair of ports which co act with ports in said valve-casing whereby the ingress and egress of steam to and from a cylinder is controlled, as and for the purpose specified.

5. A valve of the class described comprising a valve-casing provided with a chamber provided near its upper end with intake and exhaust ports the inner ends of each of which is flared, as described, and further provided with a pair of live-steam, and exhaust-steam, ports, opening from said chamber near the bottom thereof and spaced apart; a reversing valve mounted in said chamber; a partition dividing this valve into two separate chambers each of which is provided with a port, and means for limiting the range of movement of said valve so that the ports opening from the said chambers thereof can be made to register, at will, with the desired one of the said live-steam, and the desired one of said exhaust-steam, ports, as and for the purpose specified.

6. A valve of the class described comprising a valve-casing provided with a chamber with which communicates a pair of livesteam, and a pair of exhaust-steam, ports; a distributing-valve mounted to operate within said chamber; a partition dividing this *alve into two distinct chambers, each of the said chambers being provided with a port which co-acts with its respective pair of said live-steam and exhaust-steam ports, the said chambers being further each provided with a pair of ports which co-act with ports in said valve-casing whereby the ingress and egress of steam to and from a cylinder is controlled, as and for the purpose specified.

7 A valve of the class described comprising a valve-casing provided with a chamber with which communi ates a pair of livesteam, and a pair of exhaust-steam, ports; a distributingvalve mounted to operate within said chamber; a partition dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-acts with its respective pair of said. live-steam and exhauststeam ports, the said chai'nbers being further each provided with a pair of ports which co-act with ports in said valve-casing whereby the ing ss and egress of steam to and from a cylinder is controlled, and a valve controlling the passage and path of steam to and from said distributingvalve, as and for the purpose specified.

8. A valve comprising a valve-casing provided with a tapered-chamber having intake and exhaust ports; a tapered valve resting in said chamber; a partition longitudinally provided with a bore, the said partition extending above the top of the valve in the "term of a sleeve which is internally threaded at its upper end; a stud resting in said here and having its upper end threaded to engage with the threaded parts of said sleeve; the said stud projecting beyond the bottom of said valve and contacting with a block carried by the v'alve-casing at the bottom of said chamber to prevent the valve from be ing ammed in its seat; a coiled spring surrounding the said sleeve and a cap secured to said valve-casing and above said valve and through which said sleeve extends, and housing said spring, as and for the purpose specified.

9. A valve of the class described comprising a valve-casing provided with a first chamber provided with intake and exhaust ports, the inner end of each of which is flared as described, and further provided with a second-chamber connected with the first-mentioned chamber by a pair of livesteam and a pair of exhaust-steam ports; a reversing valve mounted in the first-mew tioned chamber: a partition dividing this valve into two separate chambers each of which is provided with a port; means for limiting the range of movement of said valve so that the live-steam chamber thereof will always be in communication with said intake-port, and the exhaust-steam chamber thereof will always be in communica tion with said exhaust-port; a distributingvalve mounted within said second-mentioned chamber; a partition dividing this valve into two distinct chambers, each of the said chambers being provided with a port which co-acts with its respective pair of said live-steam and eXhaust-steam ports,

and the said chambers being further each provided with a pair of ports which co-act with ports in said valve-casing whereby the ingress and egress of steam to and from the cylinder is controlled, one pair of the said pairs of ports of said distributingvalve being closer together than the other pair of said ports of this valve, and co-acting with a pair of the said ports in said valve-casing which are wider apart than the same; this pair of ports inthe said valve-casing being wider apart than the other pair of ports in said valve-casing with which co-act the second-mentioned pair of ports in said distributing-valve which are wider apart than the same.

10. A valve of the class described comprising a valve-casing provided with a chamber with which communicates a pair of live-steam and a pair of exhaust-steam, ports; a distributing-valve mounted to operate within said chamber; a partition dividing this valve into two distinct cham bers, each of the said chambers being provided with a port which co-acts with its respective pair of said live-steam and exhauststeam ports, the said chambers being further each provided with a pair of ports which co-act with ports in said valve-casing whereby the ingress and egress of steam to and from a cylinder is controlled, one pair of the said pairs of ports of said distributing-valve being closer together than the other pair of said ports of this valve, and co-acting with a pair of the said ports in said valve-casing which are wider apart than the same; this pair of ports in the said valve-casing being wider apart than the other pair of ports in said valve-casing with which co-act the second-mentioned pair of ports in said distributing-valve which are wider apart than the same.

11. A valve of the class described com prising the combination of a valve-casing having a chamber provided with ports, and further provided with a second-chamber communicating with said first-chamber; a hollow cylindrical distributing valve, mounted in said secondchamber, and provided with a transverse partition dividing the valve into two separate chambers, each of the said chambers being provided with a plurality of ports opening through the side of said valve; the said valve-casing being further provided with ports leading from said second-chamber to the engine cylinder; means, under the control of the engine, for operating said distributing-valve so that the ports therein will co-act with the ports opening into and out of said second-chamher to permit steam to do work, and a valve mounted in said first-chamber controlling the passage of steam to said distributingvalve, through the ports leading from said first-mentioned chamber to said secondchamber, as set forth.

12. A valve of the class described comprising a valvecasing provided with a chamber provided with ports leading from a source of supply for the motive fluid, and further provided with ports leading to and from the cylinder of an engine; a hollow cylindrical distributingvalve mounted to operate in said chamber, and provided with a transverse partition dividing the valve into two separate chambers, each of the said chambers being provided with intake and exhaust ports, which co-act with the intake and exhaust ports leading to the engine cylinder; so that when steam is being received into the said engine-cylinder through one of the ports in one of said chambers formed in said distributing-valve, steam is escaping from said cylinder, through one of said ports of the other chamber of said distributing-valve diagonally placed in respect of the said one port of the said one of said chambers of said distributing-valve, into this said other chamber, and out of this said other chamber through an exhaustport formed therein, and escaping from said valve-casing by one of said ports formed therein, and a valve controlling the passage of steam into said valve-casing.

13. A valve of the class described comprising a valve-casing provided with a chamber provided with ports leading from a source of supply for the motive fluid, and further provided with ports, grouped in pairs, leading to and from the cylinder of an engine; a hollow distributing-valve mounted to operate in said chamber; a partition dividing said valve into two distinct chambers each of which is provided with three ports, two ports in each chamber being grouped together to form a pair, and which co-act with their respective pair of ports in said casing leading to said engine cylinder, the ports in said valve on one side of said partition, according to the direction in which the engine is running, being intake ports, and the remaining ports in said valve being exhaust ports; means, under the control of the engine, for operating said distributingvalve, and a valve controlling the passage and path of motive fluid to and from said distributing-valve.

In testimony whereof I have aPfiXed my signature in presence of two witnesses.

ALFRED HACKETT. Witnesses:

S. C. TEACHER, Row. L. SHANNON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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