US1859811A - Slide valve and spring therefor - Google Patents

Description

y 1932; c. H. voss 1,859,811

SLIDE VALVE AND SPRING THEREFOR v Filed Nov.5, 1931 lnueni'or: C 3 Vbss By 1 Atty.

Patented May 24, 1932 ATENT OFFICE CARL H. VOSS, F SHERIDAN, WYOMING SLIDE VALVE AND SPRING THEREFOR Application filed November My invention relates to new and useful improvements in slide valves, and more particularly to the spring for holding the slide valve tightly on its seat.

Still another object of the'invention is to provide a new slide valve spring that may be used in triple valves, both on freight and passenger cars, and also in all air brake appliances requiring a slide valve spring.

As is well known to those skilled in the art, the forms of triple valves which are used today are each provided with a leaf spring which are held in position by a rivet. Under the American Railway Association ruling, every triple valve which comes into a shop for cleaning or repairing must have the slide valve removed from its piston, so that it may be thoroughly cleaned and lubricated. Now

the only manner in which this spring can be removed is by drifting out the rivet, and it often happens that due to the trouble in doing so, the workman does not remove it and the valve, therefore, is not thoroughly removed and cleaned.

It also often happens that if the workman removes the rivet, the slide valve is caused to leak, as when drifting out the rivet the slide valve or the valve guides become bent. Further, it sometimes happens that the rivet is bent while being finally peened or headed and this keeps the spring from working properly.

Lastly, it is also necessary, when drifting out the old style of rivets that hold the leaf 3" springs, to file ofi the burrs or heads of the rivets, all of which takes time, so that often the slide valve and the graduating valve are neglected or their proper repairs not made.

Another object, therefore, of the present invention is to provide a slide valve having a spring that may be quickly and easily removed, that will have less frictional resistance and use possibly less material in making the spring, and finally dispensing with a the objectionable rivet.

With these and other objects in view, the invention consists in certain new and novel arrangements and combination of parts, as will hereinafter be more fully described and pointed out in the claims.

3, 1931. Serial No. 572,840.

Referring now to the drawings showing a preferred embodiment,

Fig. 1 is a vertical section with parts in elevation;

Fig. 2 is a top plan view of the slide valve with the spring in place;

Fig. 3 is a transverse vertical sectional view of the slide valve;

, Fig. 4 is a perspective of the spring showing the manner in which it is formed.

Referring now to the several views and for the moment to Fig. 1, there is shown a conventional type of valve, with my improvement about to be mentioned, consisting of the cylinder 1, the piston 2 therein, and the slide valve 3 with its guide arms 4. There may also be seen the graduating valve 5 and the various ports 6, all of which are common to the standard slide valve of today.

Now instead of having a leaf spring, old form, (not shown) in the upper ends of the slide valve guides and providing a rivet to hold the spring in position, there is shown two oppositely positioned pintles 7 that are removably mounted in holes 7 in the opposing center guide arms 4, and to these pintles are fixedly mounted the spring 8,

which will be shortly described in full detail. The purpose of the spring, of course, is to hold the slide valve 3 tightly on its seat 9, in which are the various ports, as heretofore mentioned.

- It is not thought necessary to describe all of the ports of this slide valve and the graduating valve, as the gist of the present in vent-ion is to so mount the spring on the slide valve as to hold the slide valve and graduating valve together on their piston, as well as to hold the slide valve tightly to its seat, and provide easy removal of the slide valve from its piston when it is sent in for repair or cleaning and lubrication.

Now referring to Fi 4 in particular, there is shown the spring 8, which has to be wound in a certain manner, about to be described, so

that its opposite axes will tend to spread rather than spring together.

I preferably form the spring of one thirtysecondth of an inch spring steel and starting with the end 10 (see Fig. 4), it extends Lil up to the point 11 where it is wound in a coil or helix 12, while from the coil extends the straight portion 13. The spring is then looped, as at 14, and extends straight again, as at 15, up to where it is wound again in a coil or helix, as at 16. The continuing straight portion 18 is then looped, as at 19, and continuesstraight again to its end 20 which is now opposite and overlaps the end 10 it started with. These two ends may then be soldered or welded, as at 21.

The little center loops 14 and 19 embrace the pintles or pins '7 that are to be mounted in holes 7 in the upper ends of the arms t, so that the two coils of the spring, when in position, will bear against the upper wall 22 of the casing, and the spring, being'mou-nted on the pintles T in the guise arm 4, will hold the slide valve down tightly on its'seat 9. The pintles 7 are welded or soldered within the loops shown, so that these pintles may be quickly fitted within the holes 7 in the arms 4. To place the spring in position, it is, of course, only necessary to squeeze the opposite loops 1% and 19 together, after which these pintles 7 may he slipped within the holes 7, while the spreading action of the parts of the spring will tightly hold them in their respective holes.

t will be seen that by forming the spring as above outlined, there is always a tendency for the pintles to spring apart, which action will, of course, tend to hold them tightly within their respective holes in the guide arms of'the slide valve.

When it is desired to remove the slide valve so that the same may be cleaned or lubricated or its face ground, it is only necessary, after removin the piston,-to press the axes of the springs together, which will, in turn, remove the pins 7 from'thearms and the slide valve or graduating valve may then be ground or lapped or lubricated, as is found necessary. It is then but the matter of a moment to again slip the spring in place or a new one, if required, and the valve will thus be held at all times tightly-on its piston and on its seat, preventing any leakage of air.

From the foregoing, it will be seen that I have dispensed. with a rivet and in its stead use two small pintles. I have alsodispensed with the ordinary leaf spring and have provided a differentform of spring that n ay be quickly and easily removed or as quickly and easily replaced, thu's'doing away with the ordinary drifting out of the rivet and possible mutilation of the valve, valve seat, or guide arms.

Finally, it will be seen that with the present invention, the manner of removing the slide valve and graduating valve from their piston is so simplified that there will be no excuse for the workman not to remove it and to properly clean and lubricate it, ac-

cording to the American Railway Association ruling.

Although I have shown the spring in the valve of freight brake equipment, it will be understood that it is easily applied to any form of triple valve or air brake appliance which has heretofore required a slide valve spring'and a rivet to hold the same.

Many slight changes are possible without in any way departing from the spirit and scope'o f the invention, such as fixedly mounting the pintles 7 and slipping the loops over them, and I do not limit myself to the specific construction hereinbefore set forth except as hereinafter claimed.

'1 claim:

1. A slide valve including guides, a continuous spring having-a helix at its opposite ends, pintles associated with the guides and with-the spring for holding the spring in position in the guides.

2. A slide valve having guiding arms forniin ga ,partthereof, two of the opposite arms provided with openings therein, an endless spring having coils at its opposite ends, {pintles associated with the spring substantially midway of its length, and the .pintlcs fitting within the holes of the guides of the slide valve and holding the sprin in place.

3. A. slide valve including guiding arms, two of the opposite arms provided with open ings therein, a spring having coils at its opposite-ends, pintles fixed to the spring substantially midway of its length,'the pintles removably fitting within the holes of the guides of theslide valve and thespring also holdingsaid pintles tightly iinthe respective oppositearms.

4. A slide valve including upright portions, .a'continuous spring having a helix at its opposite ends and loops midway of its ends, pintles :rigidly secured within said loops, said ,pintles .removably placed within said upright portions of the slide valve, and the spring so formed as to continuously ,press said pintles away from each other.

5. A slide valve having oppositely positioned uprights, .a spring endless inform and having "a helix at its opposite extremities, pintles extending from the opposite sides of the spring and sprung within the uprights, and the springso formed as to normally tend to force the pintles outwardly from each other to hold the spring in place.

6. A slide of a slide valve having oppositely positioned guide arms, -.a spring endless .in form having a helix at its opposite extremities, loops formed on each side of the spring between the saidhelices, pint'les rigidly fitted within said loops, and-the p intles sprung within the guide arms, the helices so wound as to normally force the pintles outwardly from each other to thereby tightly hold the spring within said ,guide arms.

7. A spring formed of wire .an d having parallel sides and a helix at its opposite ends, 100 s formed in the wire between the helices an at points opposite each other, the two parallel sides of the spring extending from the outer sides of the said helices whereby the said parallel portions will have a tendency to be normally forced away from each other.

8. A spring for a slide valve consisting of wire bent to form parallel slides and a helix at its opposite extremities, loops formed midway between the helices, the parallel portions of the wire extending to the outer turn of the helices whereby the said parallel portions will tend to spring away from each other rather than towards each other.

9. A spring for a slide valve comprising a wire having its ends secured to form a spring loop and the loop having a helix at its opposite extremities, the wire being bent between the helices and adapted to be secured to respective supporting means, the coil of each helix bein so wound as to normally force the stran s between the helices apart rather than towards each other.

10. A wire spring having a helix at its opposite extremities, supporting loops formed between said helices, one side strand of the spring extending from the bottom of one helix to the top of the opposite helix and the other strand extending from the bottom of the last-mentioned helix to the top of the firstmentioned helix whereby the side strands of the spring will tend to spring apart rather than toward each other.

In testimony whereof I ailix my si ature. CARL H. BSS.

Images