US1638170A - Hopper door for railway cars - Google Patents

Description

' 1638170 Aug. 9, 1927. v- E. SISSON a v HOPPER DOOR FOR RAILWAY CARS Original Filed Aug. 10, 1925 Patented Aug 9, 1927.

UNITED STATES PATENT oFFicE.

VINTON SISSON, oronicaoo, ILLINOIS, essieivon To UNION METALPRODUCTS COMPANY, or CHICAGO, ILLINoIs, A CORIORA'DION or DELAWARE.

HOPPER noon FOR RAIIQwAYjcARs'.

Original application filed August 10, 1925, Serial No. 49,295. Divided andthis application filed March' 8, 1926. Serial No. 93,588.

edges and is capable of being dropped. or swung open so that the load in discharging slides or passes over the upper surface of the" door. Any means of raising the door tothe closed position and any means for locking and releasing the door may be employedwith my device. 7 v I Experience has shown that a slight pro ection on the upper surfaceof such a door J V tnereof'be as light as possible. Furthermore,

causes the discharging load to bank up and seriously retard the unlo'aijlingof the car' sometimes completely obstructing the opening and at othei't nies causing material to remain n the car. It is essential that the entire load be discharged when the doors are dropped in order to conserve time when the cars are being used to ballast a main line track, orto eliminate'the necessity of maintaining men to remove any small portion of the load that remainsin the car after the doors are dropped The relative position of the rail, thetr'uck (and other parts of the car) iLIlGl'SQIVlCQ conditions also regulate the inclination "of the door after it is dropped, so that it is seldom;

possible to allow the doors to drop to a vertical position; in fact, in a drop bottom.gon-- dola car, the doors are positionedonly about thirty degrees from ahorizontal plane when in open position. a

A door for this purpose must be f very strong and durablebecause: Y

Firstyit is'a part of the and as'such must sustain the load aswellas the impact blow of the load when the car is in motion. Second, the car is frequently loadedpfrcm chutes or tipples from a height of ten feet or more, causing the load to be dropped directly upon the doors. 7 clam shell bucketsarefrequently used to" un load such cars andfi-t is notuncoininon for these buckets to rest upon and drag over the doors. Fourth, when the door suddenly comes to rest after beingdropped, itis not only subjected to a severe shock." but it must sustain the severe impact which, of course, follows thedoor. Fifth, as the load is theoretically equally distributsome of the I floor of the car thrust of the load."

ed, the door must be strong over its entire area and must be capable of transmitting the resulting stresses to the car body without a much deflection and no substantialv distortion. Any bending of the door or drooping of. thec'ornei's would cause a leak of the lad- .ing especially of such fine material as sand, chats, etc. Any bending or warping might interfere with the complete closing and locking of the door.

, As it costs as much to haul a ton of car as itdoes to haul a ton of payingfreight, it is imperative that the car and any part have been formed in metallic platesrwhich,"

however interfere with the discharge of the loading or have other objectionable features.

In my design the. corrugations are beams supported adjacent their opposite ends by the hinges or hinge strap positioned substantially at right angles to "the corrugations "ll ehinge-beanis are supported at their opposite ends to the car body. This crosswork o f'beams makes a very strong and eiii cient means of carrying the load. Continuous beams supported ad acent their opposite ends have great strength to resist the stresses of equally distributed loads. In my arllti V rangen'ient, l have obtained'cooperation of the corrugations and'hinges an'd' yethave not interfered with the discharge of the lading: This lastfeature isaccomplished by the peculiar andparticular, configuration of the corrugation;

1 One, of't'he objects of the invention is to I obtain a strong durable door for a load discharging freight car made of a metallic plate formed with integral corrugationswhich are positioned approximatelynormal to the direction' of discharge of the lading but are of such configuration as not to interfere with the movement of the cargo when leaving the car.

Another object of the invention is to provide an arrangement whereby the corrugations are positioned substantially normal to the supporting hinges and yet will not interfere with the discharge of the lading;

Another object of the invention is to attach the hinges to the corrugated door so that the securing means (usually rivets) will not interfere with the discharging of the of the invention.

In the drawings:

Fig. 1 shows a portion 'of'a railway car with my device applied thereto.

Fig. 2 is a section on line 22 of Fig. 1.

Fig. 3 is similar to Fig. 2 but shows the door in open position.

Fig. 4 is a section on line 4l-t of Fig. 1.

Fig. 5 is an enlarged section of thecorrugation.

Fig. 6 shows the attachment of the hinge to the door.

To illustrate one adaptation of mydevice, ,I.have shown a so-called general service drop bottom gondola car wherein the major portion of the floor consists of drop doors. The dooropenings are surrounded by the'center construction, side wall and cross diaphragms. In normal or closed position the door completely closes this open-, ing and, 1n fact, is a trifle larger-on all s des than the opening so as to provide a lap joint between the door and the car frame members. center construction and are adjacentthe side wall by the raising or looking mechanisms. Any convenient stop, such as 2, may be used to limit the downward movement of the door.

The door is made of a metallic plate (preferably steel) which is reinforced with integral corrugations 3 resting upon hinge beams 4, the corrugations extending continuously their full depth between the hinges and then decreasing in depth (5) and mergng into the original plane of the plate 6 and preferably in close proximityto the stiffening flanges 7, which are formed at the opposite edges of the door. This arrangement The hinge beams are hinged to the supported provides a very etlicient double supported beam with overhanging end portions and obtains a cooperation between the hinge beams, the corrugations and the flanges.

These corrugations extend continuously between the opposite edges of the door and preferably under the adjacent cross diaphragms 9 (forming the opposite edges of the door opening) as shown in Fig. 1, so as to reinforce the entire part of the door upon which the cargo rests.

The contour of the corrugations is such that when the doors are in open or dropped position the corrugations will not interfere with the discharge of the lading. For convenience, I have described the corrugations as comprising an inner wall 30 and an outer wall 81, i. e., the inner wall is the one positioned near the insideedge or hinge edge of the door. The inner walls are preferably substantially perpendicular to the'original' plane of the plate 6, so as to form stiff and strong ribs. The outer walls are preferably Wider and positioned obliquely to the original plane of the plate. The obliquity is such that When the doors are open these walls are inclined toward the outer edge of the door, i. e., the angle or slant of the plate of the. outer walls (as shown by line 1212) willnot permit the lading to stay thereon, and furthermore, the outer wall chutes the cargo,

over the inner wall or Web of the adjacent corrugations so that the inner wall doesnot retard the movement of the cargo. The'inner walls 30 and outer walls 31 merge into each other and there is no space between the corrugations. The inner walls are substantially perpendicular to the plane .of the plate so as to form stiff webs, while the outer Walls are wider and positioned obliquely to the original plane ofthe "plate. The hinge 4 is preferably joggled and se-- cured to the outer walls 31 adjacent the in ner walls, as shown in Fig. 6, so that the discharging materialwill not come in contact with the rivets or bolts for reasons outlined above. I 1 f This is a division of my co-pending application Serial No; 49,295, filed August 7' I claim 1. In combination with the other elements. 7 V

of a railway dump car; adoor made of a metallic plate formed with corrugations, each of said corrugations comprising an inner wall and an outerlwall, said inner wall being narrower than said outer'wall, and substan tially perpendicular to the original plane of V I the plate. y

2. In combination with the other elements of a railway dump car; a door made of'a metallic plate formed with corrugations terminating within the'edges of the'plate, each of said corrugations comprising an inner wall and an outer wall, said inner wall being narrower than said outer wall, and substantially perpendicular to the original plane of the plate. a

3. In combination with the other elements of a railway dump car; adoor made of a metallic plate formed with a plurality of contiguous corrugations, each of said corrugations comprising an inner wall and an outer wall, said inner wall being narrower than said outer wall, and substantially perpendicular to the original plane of the plate.

4. A door for a railway oar made of a metallic plate formed with corrugations, each of said corrugations comprising an .inner wall andan outer wall, said inner wall being narrower than said outer wall, and substantially perpendicular to the original plane of the plate. 1

5. In combination with the other elements of a railway dump car; a door made of a metallic plate formed with corrugations comprising inner and outer walls, the outer walls being of such angular relation to the original plane of the plate that when the door is in open position said outer walls are inclined toward the outer edge of the door, said inner walls being substantially perpendicular to the original plane of the plate.

6. In combination with the other elements of a railway dump car; a door made of a metallic plate formed with corrugations comprising inner and outer walls, the inner walls being substantially perpendicular to the original plane of the plate, the outer walls being positioned obliquely to the original plane of the plate, and hinges attached.

tothe car body extending normal to said corrugations and secured to saidouter wall.

7. In combination with'the other elements of a railway dump car; a door made of a metallic plate formed with corrugations comprising inner and outer walls, the inner walls being substantially perpendicular to uINToN E. SISSON.

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