US1079980A

US1079980A - Pedestal side frame.

Info

Publication number: US1079980A
Application number: US70743312A
Authority: US
Inventors: George G Floyd
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1912-07-03
Filing date: 1912-07-03
Publication date: 1913-12-02
Anticipated expiration: 1930-12-02

Description

G. G. FLOYD. PEDESTAL SIDE FRAME. APPLICATION FILED JULY3, 19 2. 1

l I v UNITED "STATES; PATENT OFFICE.

GEORGE G. FLOYD, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN STEEL EQUNDRIES,

' OF NEW YORK, N. Y. A CORPORATION OF NEW JERSEY.

PEDESTAL sum FRAME.

Specification of Letters Patent.

Patented Dec. 2,1913.

Application filed Ju1y 3, 1912. Serial No. 707,433.

' It is becoming a well established practiceto employ integral cast steel side frames for car trucks these side frames taking the place of the flat plate arch bars which havebeen employed for many years. It has become a problem in the employment of the one-piece I side frame to connect the journal box sccurely andyet removably thereto.

such times it is, of course, necessary to disconnect the journal box from the side frame.

- In the arch bar truck this was accomplishedby removing the journal box bolts and rolling the wheels, axles and journal box out of engagement. The connection formed in such case is, however, unstable particularly in view of the fact that the nuts of the bolts become loose. Ithas also been suggested to construct jaws-0n. the ends of theintegral side frames the journal boxes being fitted between said jaws and being held in place by gravity without reliance upon any bolts. Such construction is shown in prior patents granted to me, Nos. 956,633, and 1,010,034;

In such construction the journal box is held against longitudinal and transverse strains by the jaws themselves, there being, however,-

an emergency connection preventing the separation of the journalbox' and frame under unusual circumstances.

The present invention is an improvement upon those shown in the patents just mentioned. In this construction I have provided for a slight rocking movement of the frame relative to the'box. It has been found in practice that this is conducive-to-longcr life i It fre- Q. quently becomes necessary to remove the car 1 wheels for replacement or turning and at;

be understoodthat in casting side frames and ournal boxes the dimensions cannot be expected to be absolutely accurate; that is,

- the molds cannot be made so accurately that any given dimensions will be exactly the same in any two castings. Therefore it is the custom to stipulate, maximum and minimum dimensions for certain parts. For'instance, between the jaws of an integral side frame there may be a yariation of %th to ths of an inch in difierent castingsl The same would hold true in journal boxes. Thus it will be'seen thatif a journal box of the minimum size is associated 'With'a side frame having the maximum width between jaws, there will be a comparatively largc amount of play or clearance. This is und'esirable and is obviated bymyiconstruction. The invention will be more readily understood by reference to the accompanying drawings, wherein,

Figure '1 is a side elevation of one form of an integral side frame having pedestal jaws constructed in accordance with my invention Fig. 2 is a section on the line 2-2 of Fig. 3, and Fig. 3 is a fragmentary en'- largcd section on the line 3-3 of Fig. 2; Referring more particularly to the drawings it will be seen that my novel side frame is composed of upper arch bar 10, inverted arch bar 11 and middle portion 12. The upper arch bar 10 is continued and turned downwardly forming a pedestal jaw 13. A bracket 14 is projected from the lower arch bar 11. This bracket serves as one jaw of the pedestal and also provides a bearing surface 15 for a jack or other means for elevating the frame in case the journal box is to be removed. The upper end of the journal box. is contracted as at 16, thus providing oppositely disposed wedges or wedge-shaped fillets. A journal-box is adapted to be seatedv in the opening and is provided on its upper wall with inclined surfaces 17, of an angle equal to the angle of the inclinations 16, it being understood, however, that in any case 'there is a clearance space 18 left between the top wall of the box and theside frame. .lly this construction it will be seen that the box is securely wedged in place irrespective of the extent of clearance at the sides. Fur- 'thermorc, the wear incident to service will slotted opening and. provides an tlnergency top wall are substantially the same width as that'portion of the side frame corresponding therewith in order that there may be a tight fitting engagement.

from each other and do not normally contact the jaws 13, 14, of the side frame. It will be seen that by this construction a limited rocking movement is permitted thus removing any stra n from the s1de frame due to unevenness in the roadbed.

A lug 20 is provided on the side frame, this lug having a slotted opening therethrough. A. bolt 21, carried by the lugs 22, on the journal box cooperates. with this connection preventing separation of the parts except as desired.

It will be understood that the construction herein shown may be modified to a certain extent and such modifications as i are within the scope of my claims I consider 2. In a car truck, the combination of a.

side frame having integral pedestal jaws, a journal box fitted between said pedestal jaws, flanges on the exterior of said box,-said flanges projecting from the top and sides thereof, the top flanges being locked tightly to embrace the side frame and the side flanges being flared from each other where- However,the ribs on the side are slightly flared away by to permit limited rocking movement relative to said frame, substantially as described.

3. In a car truck, the combination of a side frame having jaws providing a j ournalbox-receiving opening, the upper portion of said opening being contracted transversely, and a journal box adapted to be fitted in said opening and having its upper portion shaped to be wedged in said contracted portion, substantially as described.

4. In a car truck, the combination of a side frame having jaws providing a journalbcx-receiving opening, the upper portion of which is contracted to provide wedge surfaces, a journal box fitted in said opening and having its upper portion shaped to be fitted securely within the said wedge surfaces, wherebya tight connection is assured irrespective of the clearance between the jaws and the sides of the box, substantially as described.

5. In a car truck, the combination of a side frame having pedestal jaws, a journal box fitted within said jaws, the contacting surfaces of the box and frame at the top of the box being at an angle whereby the box is wedged in place, substantially as described.

6. The combination of a car truck side frame having depending aws, and a journal box straddled by said jaws, said jaws'having upwardly converging faces at opposite sides of the journal box which engage with correspondingly inclined faces on said journal box, substantially as set forth.

GEORGE G. FLOYD.