US756491A - Steam-valve for train-pipes. - Google Patents

Description

PATENTED APR. 5, 1904.

E. B. GOLD. STEAM VALVE FOR TRAIN PIPES.

- APPLICATION FILED SEPT. 8, 1903.

3 SHEETS-SHEET 1.

N0 MODEL.

INVENTOR: gala/M06 M,

WITNESSES:

By A ftomeys, M

No. 756,491. PATENTED APR. 5, 1904.

E. E. GOLD. STEAM VALVE FOB. TRAIN PIPES.

APPLICATION FILED SEPT. s. 1903. up MODEL. 3 SHEETS-SHEET 2.

No. 756,491. PATENTED APR. 5, 1904. E. E. GOLD.

STEAM VALVE FOR TRAIN PIPES.

APPLICATION FILED SEPT. 8. 1903.

N0 MODEL. 3 SHEETS-SHEET 3.

INVENTOR: WITNESSES; M 5 @2 1 4rd By A/Zoimeys,

UNTTED STATES Patented April 5, 1904.

PATENT OFFICE.

STEAM-VALVE FOR TRAIN-PIPES.

SPECIFICATION forming part of Letters Patent No. 756,491, dated April 5, 1904.

Application filed September 8, 1903. Serial No. 172,280. (No model.)

To aZZ whom it may concern:

Be it known that I, EDWARD E. GOLD, aciti- Zen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Steam-Valves for Train- Pipes, of which the following is aspecification.

Steam-pipes for trains, according to some systems, are provided with valves at the opposite ends of each car. When the steam is on, the valve at the rear end of the rear car is usually left open a very little to permit drainage and the passage of some steam. According to my invention a valve is provided specially adapted for use as an end valve on such train-pipes. My improved valve permits a regulable slight leakage of steam, and for this purpose is provided with means for holding it in any desired one of a plurality of positions closely adjacent to its closed position. The possibility of adjusting the opening and holding the valve firmly in the adjusted position adapts it to trains of diflerent lengths, the operation of the system on long trains being more efficient Where the opening of the rear end valve is larger than would be necessary for shorter trains.

Certain other advantages in detail are referred to hereinafter.

The accompanying drawings valves embodying the invention.

Figure 1 is a longitudinal section of a complete valve. Figs. 2 and 3 are separate views of parts thereof, the former being an under side plan of a toothed plate and the latter a top side plan of aspring. Fig. 4 is a section on the line 4 of Fig. 1. Fig. 5 is a longitudinal section of another embodiment of the invention. Figs. 6 and 7 are respectively an under side and a top side plan of certain details. Fig. 8 is a longitudinal section of a third form of the device. Figs. 9 and 10 are respectively an under side and a top side plan of details. Figs. 11 and 12 are plans of the valve in its casing and with the top plate removed.

The stem of the valve and the casing or other suitable fixed structure are provided with complementary interengaging devices, which are pressed into engagement with each other with illustrate a pressure sufiicient to hold the valve in any one of the desired positions in which it may be set notwithstanding the jarring which it receives and the steam-pressure which may be against the valve, but not sufiicient to pre vent the movement of the valve by hand to another position. For example, as shown in the drawings, the cylindrical valve-body A may be arranged to bereciprocated in the easing B by means of an eccentric 0, carried on a shaft D, having its upper end squared to receive a hand-lever E, the casing being supplied with a plate F, which is removable to permit the insertion of the movable parts within the casing B.

G is the valve-seat.

The valve as thus far described is a wellknown type, the construction and operation of which is specifically set out in my Patent No. 585,383, of June 29, 1897. The present improvement is especially adapted to valves of this type with a rotatable or oscillatory operating-stem and a valve proper moved transversely thereto and bodily toward and from its seat, because such a valve indicates at once by the angular position of the handle the exact position of the valve and can be moved from one extreme position to the other quickly by a fraction of a complete turn and because by reason of the eccentric or similar motiontransmitting device employed the first open ing movement of the valve may be very gradual. The improvement, however, may be ap plied to valves of various types other than that herein shown.

As illustrated in Fig. 1, the top plate F of the valve-casing may be provided on its under side with a ring H (shown in under side plan in Fig. 2) and preferably separately formed of hardened steel and attached thereto by riveting, as shown, which plate is provided with teeth J, having faces inclined in both directions. For engaging the teeth J, I provide a member K, having teeth K, engaging the teeth J and which is formed of spring metal and attached to the shaft D, so that it turns with the latter. The spring in the member K holds its diametrically opposite points in engagement with the teeth J under ordinary running conditions. The spring-prestype.

member K when the valve is shut or nearly shut. The amount of opening required at the rear end of the train is always very slight,

even though it is different for trains of different lengths. By making the member K double-ended I secure an even and very strong pressure and utilize the spring to hold the valve proper and stem down against the unbalanced upward steam-pressure. The stuffing-box may extend down nearly to the hub of the spring K to prevent such upward movement if the spring should break. The member H is preferably provided with teeth J at diametrically opposite points, so as to engage both ends of the spring member K simultaneously. Preferably, also, the member H is provided with a series of teeth J at diametrically opposite points half-way between the teeth K in the closed position, which act to hold the valve wide open. Figs. 5, 6, and 7 illustrate another form 0 the invention applied to a valve of the same In this case the fixed member of the holding means is formed on or applied to the under face of "the stufiing-box member L, which screws into the movable top plate F, as shown. The under side of the member L is provided with inclined teeth J which may be formed entirely around the face of the member L or may be formed only at intervals, like the teeth J and J of Fig. 2. Cooperating with the teeth on the member L'is a member M, fitted to turn with the shaft D and pressed upward by a helical spring N, surrounding the shaft. The member M may be a complete annulus, as shown in Fig. 7 with teeth arranged entirely around it, or may have merely an elongated double-ended shape with its ends toothed to engage the teeth of the member L. The operation is substantially identical with that of the construction shown in Fig. 1. The toothed members L and M are held in engagement with each other by means of the spring N so firmly that the valve is held in any position to which it is moved under all ordinary circumstances. When, however, it is desired to change the position of the valve, the lever E may be turned by hand, the inclined interengaging teeth sliding over each other and the spring N yielding to permit this and the turning of the shaft.

, Another suitable construction is illustrated in Figs. 8, 9, and 10, being here also applied to the Gold type of valve. The stuffing-box member L in this case instead of being provided with inclined teeth is provided with a conical friction-face J Amember M is mounted on the shaft D to turn with the same and is provided with a conical face fitting the face J 3 of the member L. A spring N holds the parts L and M in close frictional engagement and prevents the turning of the shaft D and the movement of the valve A under ordinary running conditions. When the lever E is turned by hand, however, the spring N yields and lessens the degree of contact between the conical faces of L and M and permits of moving the valve to any desired position. The frictional engagement is effective for any position whatever and permits of finer adjustment of the position than do the structures shown inFigs.

1 and 5.

A feature of improvement designed especially for end valves (understood best from Figs. 1, 11, and 12) is the limitation of the movement of the valve-body or valve proper away from its seat, so as to limit the rotation of the stem and to permit the valve to close only the outlet end of the casing, communication between the valve-chamber and the inletpipe being free in all positions. The cylindrical valve proper, A, reciprocates in the axial line of the train-pipe and rests in a substantially cylindrical bearing 0, which is preferably cast with the casing and embraces the valve proper at its sides. A-stop, preferably in the form of a rib P, also formed integrally with the base of the casing, is in position to engage the rear end of the valve proper, A, when the latter is retreated sufficiently from its seat G to leave a wide open passage for the steam. In Fig. 11 the valve is shown closed and in Fig. 12 open.

Though I have described with great particularity of detail certain embodiments of my invention, yet it is not to be understood that the invention is limited to the specific constructions disclosed. Various modifications of the same in detail and in the arrangement and combination of the parts may be made by those skilled in the art without departure from the invention.

What I claim is 1. In a steam-valve in combination, a rotatableoperating-stem substantially fixed against longitudinal movement, a pair of interengaging members one fixed and the other rotatable with the operating movement of said stem, said members being yieldingly held in engagement so as to holdthe valve fixed in the position to which it is moved under ordinary conditions, and to yield to permit the movement .of the valve by hand.

2. In a steam-valve in combination, a rotatable operating-stem substantially fixed against longitudinal movement, a non-rotatable member having a beveled tooth, a member rotatable with said stem and having teeth engaging the tooth of said fixed member, and one of said members being pressed against the other with a yielding pressure so as to permit a nice adjustment of the opening and to hold the valve fixed in position under ordinary conditions, but to permit its movement by hand.

3. In a steam-valve in combination, a valvecasing, a valve proper therein, a rotatable operating-stem, said valve proper being moved in a direction transverse to said stem, and means within said casing for holding said valve impositively locked in position closely adjacent to its closed position.

4. In a steam-valve in combination, a valvecasing, a valve proper therein, a rotatable operatin -stem, said valve proper being moved in a direction transverse to said stem, and means within said casing for holding said valve impositively locked in its wide-open position.

5. In a steam-valve in combination, a valvecasing carrying a toothed member H, an operating-stem carrying a spring member K with teeth engaging the teeth of said member H and pressed thereagainst with a spring-pressure, said teeth being beveled so that said valve is held fixed under ordinary conditions, but is movable by hand.

6. In an end train-pipe valve in combination, a valve-casing having connections at opposite ends for the train-pipe, a valve proper movable in the axial line of the train-pipe, a seat at one end of the casing against which the valve proper may rest and close the train-pipe at such end, the movement of the valve proper tion, a valve-casing having connections at opposite ends for the train-pipe, a valve proper movable in the axial line of the train-pipe, a seat at one end of the casing against which the valve proper may rest and close the train-pipe at such end, and a stop in said casing for limiting the movement of the valve proper toward the opposite end of the casing.

8. In an end train-pipe valve in combination, a valve-casing having connections at opposite ends for the train-pipe, a valve proper movable in the axial line of the train-pipe, a seat at one end of the casing against which the valve proper may rest and close the train-pipe at such end, the movement of the valve proper toward the opposite end of the casing being limited to prevent closing the train-pipe at said opposite end, and means for permitting a nice adjustment and locking said valve in various positions to which it may be moved.

In witness whereof I have hereunto signed my name in the presence of two subscribing Witnesses.

EDWARD E. GOLD.

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