Abstract: A mobile cement laying machine for delivering concrete via tracks to areas which are difficult to access by truck. The mobile cement laying machine includes a carriage with a front end and a back end. A hopper is mounted to an upper side of the carriage toward the front end of the carriage. The hopper has an open top and a slot providing a lower opening into the hopper for dispensing cement from the hopper. A gate substantially closes the slot of the hopper. A pair of first rail wheels are coupled to the carriage towards the front end of the carriage. A pair of second rail wheels are coupled to the carriage towards the back end of the carriage.

Abstract: An apparatus for opening and closing the discharge doors of a railroad hopper car is described comprising a mounting frame secured to the hopper car forwardly of the discharge door and having a pivot frame pivotally secured thereto which is interconnected to the discharge door by an elongated linkage. A pivot arm is also pivotally secured to the mounting frame and has an air cylinder pivotally secured thereto which is interconnected to the pivot frame. Extension of the hydraulic cylinder causes the pivot frame to pivot with respect to the mounting frame thereby causing the adjustable linkage to open the door. Retraction of the cylinder rod into the cylinder causes the pivot frame to pivot with respect to the mounting frame to cause the adjustable linkage to close the discharge door. When the door is in its closed position, the cylinder rod of the air cylinder is in its retracted position.

Abstract: A surface-treated steel sheet is provided, at a low cost, which has high weldability and is useful for a material of containers of foods and beverages. The surface treatment is conducted by applying flattened granular tin coating deposits having a specified diameter and high adhesion on a steel sheet surface at a specified plated area ratio, and applying thereon a metallic chromium coating and a chromium hydrate oxide coating.In the surface treatment, firstly, the surface of a steel sheet is subjected to tin-plating in an acidic tin plating bath containing a conventionally used brightener in an amount of from 0.001 to 0.05 g/1 so as to form flattened granular tin coating deposits having a diameter of 0.4-2.4 .mu. at a plated area ratio of 5 to 30% and to improve the adhesion to the steel sheet and decrease falling-off of the granular tin coating deposits until completion of chrome-plating, thereby the variation of the amount of tin coating being decreased.

Abstract: A railroad hopper car comprising an elongated car body having a plurality of laterally pivoted bottom discharge doors; a door opening and closing elongated beam assembly positioned longitudinal of and along the bottom portion of the car; a plurality of spaced apart door operating levers mounted on a pivot lateral to the car body along and to the bottom of the car; the door operating lever pivot including a lateral shaft to which the operating lever is fixedly joined; a pair of laterally spaced apart supports on the car body beneath the elongated beam assembly with each support carrying a bearing mount for the door operating lever pivot; each bearing mount being fixedly joined to the support at a position determined by the actual position of the beam sections when installed rather than at a predetermined location on the support thereby making it unnecessary to include elements to adjust the length of each beam section.

Abstract: In a railway hopper car with several bottom dump doors, the doors are operated by a main door operating member in the form of a thrust bar running the length of the car. The bar, when moved, rotates levers which rotate actuator shafts which move door operating linkage arrangements, opening and closing the dump doors. An adjustable positioning structure is provided on each lever to cause adjustment of the individual dump door positions. The adjustment is accomplished by tightening or loosening bolts in the adjustor, which is fixed on an actuator shaft running to the linkage arrangement. The adjustor and actuator shaft rotate on a bearing with respect to the lever, but are held in locked adjusted position by the adjustor bolts abutting on flanges welded to the lever.

Abstract: In a discharge gate arrangement for cargo hoppers for bulk cargo, a cover is guided for sliding in its own plane between a closed and an open position. The cover is also mounted for movement towards and away from the plane of the discharge opening at the end of the closing movement and the beginning of the opening movement, respectively. In the closed position the cover presses against a gasket laid around the opening, providing a gas- and liquid-tight seal.

Abstract: A hopper discharge unit for attachment to the bottom of a hopper has upright side and sloping end walls all terminating in horizontally inwardly directed flanges defining between them a rectangular outlet opening, with the side walls extended rearwardly beyond the sloping rear end wall to form a support for a sliding gate, which is perforated along its sides to form racks engaged by pinions on a transverse operating shaft journaled in the side wall extensions above the gate. To provide a tight seal the flange on the rear end wall is spaced above the side wall flanges to overlie the gate and a second longitudinal flange co-planar with the rear end wall flange is similarly spaced above the side wall flanges to overlie and cover the rack perforations in the gate when the gate is closed.

Abstract: When the slide gate of a hopper car is across the discharge opening and against the part of the frame that defines that opening, each of one pair of abutments below the gate and secured thereto is resting on a respective lever arm which lever arm is generally vertical and secured to the rototable shaft employed as a part of the mechanism for opening and closing of the gate. At the opposite side of the discharge opening from the shaft, the gate has another pair of downwardly facing abutments each of which then is resting on a respective generally vertically lever pivotally secured to the frame. As the gate is initially moved horizontally away from that position the lever arms pivot to permit the gate to descend. In addition to forming the downwardly facing abutments, the parts that form those abutments also form abutments which engage the lever and pivot it to an upright position as the gate is being closed.

Abstract: An outlet assembly for application to hoppers of railroad hopper cars and the like, and slidably mounting a gate for movement between open and closed positions, in which the gate slideway is defined by trackway forming members disposed at either side edge of and across the mid portion of the gate outlet port, and having the respective load supporting surfaces each lined with a special liner formed from an ultra high molecular weight polymeric material that is of dry self lubricating characteristics. The gate side edges ride on the liners of the track forming members at the respective side edges of the outlet port, and the respective gate side edges and the liners supporting same cooperate to effect a bulk material seal at the respective side edges of the gate.

Abstract: A door operating mechanism for a bottom dump hopper car including a plurality of transversely mounted bottom discharge gates arranged in oppositely opening pairs and operatively connected by compression struts to pendulously mounted vertical levers. The levers are movable divergently outward by linkages connecting them to a lever mounted on a longitudinally extending rotatable actuating shaft. The invention further provides that in the locked position the vertical levers and compression struts be in an overcenter position relative to each pair of associated discharge gates, thereby assuring positive locking of the mechanism.

Abstract: Both an operating link and a locking hook member are secured on a shaft rotatably mounted on a hopper door. The hook member cooperates with a locking lug fixed relative to the hopper for securing the door closed. The operating link is both pivoted and pushed or pulled by a crank actuated by retainable handles for operating the hook member and opening and closing the door.

Abstract: A door for opening and closing the discharge opening of a hopper is carried y a support suspended from an oblique lateral wall of the hopper by two links pivoted to the support at one end and pivoted to the support at the other end of the links. An actuating and locking mechanism for the door is connected to the support. The support has a generally triangular shape and the two pivotal connections between the links and the support are in the vicinity of two of the corners of the triangle. The door is located in the vicinity of the third corner of the triangle.

Abstract: A bottom door discharge mechanism for a railway hopper car includes a bell crank arm for each of the doors located in pairs at the bottom of the hopper. The arms are tripped from track side cams on opposite sides of the car for movement to open and closed positions. A safety locking mechanism is provided which during transit positively locks the arms against rotation to an open position. The locking mechanism includes arms or cam followers which are actuated from the track side opening cam thereby disengaging said locking mechanisms just prior to engagement of a second cam follower with said track side cam whereupon the bell crank levers are actuated to move the doors to their open position.

Abstract: A fluid motor actuating mechanism for railway hopper car doors includes a linkage arrangement which interconnects the doors to provide for opening and closing operation in concert. The doors are supported adjacent a discharge opening and are arranged to swing outwardly to maximum degree to provide an enlarged space through which material is discharged from the hopper car.