US1278740A - Car construction. - Google Patents

Description

H. M. PFLAGER. CAR cowsmuc'now.

APPLICATION FILED IAN. 5.1918.

2 SHEETS-SHEET I.

Patented Sept. 10, 1918.

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CAR CONSTRUCTION. APPLICATION FILED JAN. .5. 191d.

Patented Sept. 10, 1918.

2 SHEETS-SHEET 2.

HARRY M. PFLAGEB, OF'ST. LOUIS, MISSOURI, ASSIGNOB T0 COMM COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION 05' a CAB CONSTRUCTION.

I! Specification of Letters Patent.

Paltent Sept. 10, 1918..

Appliation filed January 5, 1918. Serial No. 8103:50. I J 1 side elevation showing my improved car construction.

2 is a top plan viewof the same. Fig. 3 1s a side elevational view partly in section of one ofthe trucks used in my 1111- proved construction.

Fig. 4 is a top plan view partly in horizontal section of said truck.

Fig. 5 is a cross sectional view through certain of the parts at the center of the truc Fig. 6 is a sectional view on line 6-6 of- This invention relates to a new and useful improvement in car construction of the ty e illustrated in Reissue Letters Patent 0. 14,221 dated November 28, 1916, the original of which, Patent No. 1,147,430, was

granted July 20, 1915. In the construction shown in the said original and reissue Letters Patent granted to me upon the dates before-mentioned, the weight of the car body including the load is supported at the four corners of-the car.

My present invention has for its object to provide means for distributing the load ofthe car on the journals when unusual track conditions exist.

I prefer to provide this means in the form of a spring or springs, auxiliary to the main carrying springs, the auxiliary springs being capable of greater deflection and greater recoil travel than the main springs, so as not to aifect the height of the drawbar from-the track.

In the form of my invention illustrated in the accompanying drawings, the compensating springs are weaker than the load supporting springs, so that when the latter, which may be" designated as the major springs, are under normal compression, the compensating spring or spring s, which may be referred to as the minor spring or springs, are under compression, 2'. e. bottled up, the spring follower of the major springs being seated home against some solid part of the structure, this home-seating of said follower being maintained in normal opera- 66 tions. However, if the main supporting springs are released from compression an have a tendency to float free, the minor spring will have its energies released so as to take up in part the freedomaof the-majonflo springs, and compress them to the extent that the minor spring assists in supporting the load.

- In the drawings, I have heretofore referred to Figs. 1 and 2 as conventionally 7t illustratin a car body in which 1 is the body of the car, 2 the wheels, and 3 the track having a depression 3 over which the wheels at the righthand side of Fig. 1 are illustrated in full lines as floatingover'the so depression, and-in dotted linesas resting upon the track in the depression. 1 I

, In Fig. 2, 4 indicates the pivotal point of the truck side frames, these being the points of reaction and showing that the car body 35 is practically supported at its four corners.

Referring now to the details of construction of my present form of truck, 5 lndllcates the truck side frame, preferably in the form of a steel casting, in which the so journal boxes .6 are arranged for the reception of the axles 7 on which the wheeels 2 are mounted. This truck side frame is recessed at its upper central portion and 'provided with a bearing plate 5 concentric with the recessed portion located in the center of the truck side frame in which is arranged aking pin 8, said king in passing through a tie .bar 9 connecting t e two'side frames. This king pin 8 is provided with a shoulder or collar 8*, as shown in Fig. 5, and extends upwardly therebeyond so as to provide a connection with the spring follower plate 10. This spring follower plate 10 hasnipples 10.disposed around its upjoint permitting a slight universal movement of the truck side frame. The spring follower has an upwardly extending hollow stem 10 which is received in a downwardly extending hollow ste! n 12 of a casting 12, the latter being riveted or otherwise secured .to the bolster top or bottom cover plate or flange,,as the case may be, by suitable rivets, as shown in Fig. 3. The tele- "scopically arranged stems 10 and 12 permit vertical movement of the respective parts with which they are identified, and in order to prevent excess rotary mo'vement,-one of these parts, as 12 (see Fig. 6) may be pro- I tend feathers or longitudinally disposed ribs on the part 10". follower bearing against the u'nderface of casting 13 and provided with nipples 14 on '26 its underface for cooperating with the springs for cooperating with feathers or longitudi vided with one or more keyways in which ex 14" indicates a spring '11 for the purpose of centering the latter.

This follower plate 14 is free to move down- Wardly on vthe stein .12, and in order to prevent excess rotary movement of said follower 14, the same is provided with recesses nallydisposed lugs 14 on the stem '12. 15

indicates the compensating spring or springsinterposed" between an outwardly extending flange at the upper edge of casting 12 and an outwardly extending flange at the lower edge of the spring follower 14.

I The operation of the above described parts is at follows;

Assuming that the car body empty weighs thirty (30,000) thousand pounds, and that there are four groups of supportingsprings I 11 at each corner of the car, these supporting springs being the usual M. C. B. eight and one-half inch springs, and that each of'which will be compressed approximately I one-quarter of. an inch under the conditions ab ovementioned. This load and extent of compression, of these major springs will force the spring follower 14 up against the lower face of casting 12, thereby compressing and 'holding under compression the minor compensating springs 15. When the car is loaded,'say to the extent of thirty thousand (30,000) pounds or more, the majorv springs 11 will be further compressed,-

- say to the'extent of about one half of an inch each; The:minor'spring 15, however, cannot, be further compressed regardless of the amount of lading in the car. Running over a straight even track, the usual inequalities therein will be absorbed by the major springs 11, but in the event that an abnormal depression in the track is reached and the major springs 11 reach or approach the point of exhaustion due to the lowered position of the truck wheels in said depression, the minor springs 15 will cause the spring follower 14 to follow down with the result that a' portion "of the weight will be trans partially mitted to all the journals. To the extent that pressure is exerted on the journals by the compensating springs 15, the reaction on the car body is necessarily co-extensive and the car body is thus supported at this point in proportion to the reacting power of the stored-up energies in the compensating springs. The strength of the compensat ng springs relative to the load supporting springs in a sense depends upon the will of the designer, and while I prefer that the major supporting springs. 11 shall cooperate with the spring follower 14 so as to cause the same to be seated against a solid portion of the car body or transom when the car is empty, it is obvious that the proportionate strength of the major and minor springs may be modified or changed as practice may require or the will of the designer select. In other words, the minor spring may be of such strength that it may assist in sup-. porting the empty car, the spring follower 14 being seated when'the car is loaded.

This, however, is unimportant in the pres ent instance.

It is obvious that minor changes in the size, form and details of the various parts of my improved car construction may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

What I claim is:

1. In-car construction, a car underframe, truck side frames, each pivotally connected to the underframe, supporting journals, supporting. springs, and compensating devices for distributing the load on the journals when the supporting springs are released or released from their load-carrying functions. l

2. In car construction, a car underframe,

truck side frames, each pivotally connected springs, and compensating springs normally under compression and whose stored-up energies are utilized to assist in sup-porting the load in the event that the supporting springs are wholly or partially released from compression.

4. In car construction, a truck side frame having pivotal relation with the car underframe, said truck side frame being provided with a bearing to receive a spring follower whereby the said side frame may have a pivotal movement with respect to said underframe, a member secured to the underframe and having telescopic relation to said follower, and another spring follower normally held against said last mentioned member which is secured to the underframe, and springs arranged on each side of said last mentioned follower.

5. In car construction, a truck side frame having a bearing seat, a spring follower arranged in said seat so as to have arocking relation thereto, a casting secured to the car underframe and having telescopic relation to said spring follower, a second spring follower arranged on said casting and having movement in one direction relative thereto, a compensating spring interposed between said last mentioned follower and said casting, and load supporting springs interposed between said two followers.

6. In car construction, a truck side frame having a concave seat, a spring follower having a convex bearing portion designed to cooperate with said seat, a king pin, a casting designed to be secured to the underframe and having telescopic relation to said spring follower, and a second spring follower designed to be seated against said casting, load-supporting springs bearing upon the underside of said last mentioned follower to hold it to its seat, and compensating springs interposed between said last mentioned follower and said casting and which are normally designed to be held in compression during the time that said spring follower is held to its seat.

7 In car construction, a truck side frame having a bearing seat arranged thereon, a spring follower cooperating with said bearing seat, a casting designed to be secured to the underframe of the car and having telescopic relation to said spring follower, said casting having a shoulder, a spring follower embracing said casting and designed to bear against said shoulder, load-supporting springs interposed between said two spring followers, and a compensating spring interposed between-said casting and the uppermost of said followers, said compensating spring embracing the major portion of said casting and said spring follower with which it cooperates.

In testimony whereof I hereunto aflix my signature this 27th day of December, 1917.

HARRY M. PFLAGER.

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