An explosion proof electrical enclosure has a relieved joining flange at the junction between the cover and the body of the enclosure. The relieved portion provides an area reducing the bolt load in the event the enclosure is subjected to an internal explosion. As a result, fewer bolts may be used to join the enclosure, reducing the cost of the enclosure, increasing the convenience of access to the enclosure and reducing the labor required to remove or install the cover. The cover of the enclosure has increased stiffening structure at the corners so that the bolts in the corners of the enclosure may be eliminated.

Explosion proof enclosure

A gondola car has a body for lading carried on an underframe. The underframe includes a center sill and cross-bearers. The car has deep side beams having top chords, side sills, and side sheets. The lower portion of the car includes tubs that seat between the cross-bearers. The car may have an internal volume of more than 8000 cu. ft. The car may have rotary dump claw sockets. The car has opposed internal and external stiffeners aligned at the longitudinal stations of the cross-bearers. The internal stiffeners may be triangular cantilevers extending upwardly inside the side sheets. The side sheet lies intermediate the stiffeners and their flanges. The top chords may be wider in cross-section than the side sills. The side sills may define torque tubes that co-operate with the sidewall stiffeners and the top chords to resist lateral deflection. The car may include a false deck, or dog-house at one end to accommodate the brake reservoir and brake valve, such that the car is longitudinally asymmetric.

Railroad gondola car structure

A railroad car truck may be assembled by spacing a pair of side frames to which is connected a transversely positioned bolster. End portions of the bolster are located within a window formed in a middle portion of each side frame to form a connection therebetween. Each side frame-bolster connection includes vertical cushioning provided by a set of coil springs interposed between a lower compression member of the side frame window and a bottom wall of the bolster. To damp the vertical cushioning of the bolster a pair of friction shoes carried by the bolster interact with wear plates fastened to vertical columns of the windows. The friction shoes impede bolster rotation which is maintained between fixed limits by contact between adjacent structural members of the bolster and side frame. To prevent undue flexing of the side window columns a stiffening rib may be selectively added to the columns.

Railroad car truck side frame - bolster connection

Phase rejection networks

Railway car underframe

This invention relates to railway car underframes, and has for an object to provide an improved construction wherein the parts are welded together in such a manner as to present an exceptionally strong and efficient structure. A further object of the invention is to construct a car underframe...

Car underframe structure

This invention relates broadly to car underframe structures and more especially to bolster center braces and back stops for draft gear associated therewith for freight cars. In our invention this center brace is made up of rolled and pressed shapes welded together to form an integral unit...

Center brace for car bolsters

This invention relates broadly to car structures and more especially to the manner of bracing the central portion of bolsters for a car body underframe. The function of the bolster center brace in this invention is to act also as a back stop for the draft gear and furthermore as a brace for...

Bolster center brace

Our invention relates to side frames for railway car trucks and more especially to truck side frames of the built up type in which the top and bottom arch bars and column members are formed of pressed sheet metal and the journal boxes each formed of cast metal, and the separate parts all secured...

Welded truck side frame

This invention relates to improvements in a car end structure for house cars in which one of the end walls is composed of doors to facilitate the loading or unloading of automobiles, trucks and the like, but are also used in general service so must be capable of carrying various types of lading...

Louis G Miller

Papers

Car underframe structure

Center brace for car bolsters

Bolster center brace

Welded truck side frame

Welded car end frame