US1963415A

US1963415A - Grain car door

Info

Publication number: US1963415A
Application number: US625619A
Authority: US
Inventors: Mattson Jacob
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-07-29
Filing date: 1932-07-29
Publication date: 1934-06-19
Anticipated expiration: 1951-06-19

Description

J. MATTSON GRAIN CAR DOOR June 19, 1934.

Filed July 29, 1932 Patented June 19, 1934 IIUNlTED PATENT Jacob Matt-son, Duluth, Minn.

Application July 29, 1932, Serial No. 625,619

1 Claim.

This invention relates to railway car doors and has special reference to what are commonly known as grain doors for cars; that is to say the inner closure for car door openings, and applicable either for grain, coal, or the like.

The principal object is to provide a more practical and durable door than heretofore known; it being very apparent to those versed in the art that cheap wooden doors are frequently used for such purpose with no provision for salvaging same, or repeating the use of the door.

Other objects and advantages of the invention will appear in the following description thereof.

Referring now to the accompanying drawing, forming part of this application, and wherein like reference characters indicate like parts:

Figure 1 is an inner elevation of one of my improved doors, illustrated in closed position as applied to a car.

Figure 2 is an enlarged elevation of the operating drum taken at right angles to that shown in Figure 1.

Figure 3 is an enlarged horizontal section through fragmental portions of the door showing one of the supporting arms in plan view; and

Figure 4 is an enlarged elevation of the automatic door locking dog.

1 represents the floor of a common box car having the door opening 2 therein and 3 represents the sheet metal grain door, this being the type I prefer in carrying out the invention. This door is formed with horizontal reinforcing corrugations 4 upon the inner surface thereof, though may be reinforced in any other manner desired. I propose to manipulate the door by the novel mechanism hereinafter described in an arcuate path intermediate of its ultimate positions as a closure for the door opening and upon a suitable ledge or shelf like receptacle 5 installed within the inner side Wall of the car.

For such installation I have provided a pair of supporting arms 6 and "1; they being pivotally supported as at 8 and 9 respectively, with their free ends pivotally attached to the inner face of the door intermediate of the two uppermost corrugations thereof, as at 10, and obviously for this purpose a suitable filler block indicated at 11 will have to be installed to provide free action of the levers without frictional contact with the reinforcing ribs. These two levers 6 and '7 are of the proper length to lodge the door when closed in its proper alignment in the opening and when opened to similarly lodge the door and retain it in proper upright position upon the shelf 5.

For manipulation of the door I provide the drum controlled line 12 attached preferably at the pivotal connection of the lever '7, thence leading to and over a suitable sheave 13 adjacent the ceiling of the car, thence to and over a similar sheave 14 to carry the line beyond the further limits of the shelf 5, and thence downwardly and through a pipe 15 as a guide through the floor of the car, to and around the small hand operated rum 16. This drum is mounted upon the short stub shaft 1'7 supported in a suitable journal on the channel iron beam 18 of the car, and upon the outer end of this shaft is carried the hand wheel 19 by which the drum is rotated in either direction for opening and closing the door.

A novel feature of this installation is that the sheave 13 is located slightly closer to the door opening than the location of the pivotal point 10 of the lever '7 when the door is in its stowed position on the shelf 5 so that winding action of the drum will tend to dislodge the door from its stowed position and start it towards closed position, to which it is ultimately carried by gravity as is obvious.

As a tight joint for the forward edge of the door I have illustrated a metal angle cleat 20 about the corner of the door post 21 between the free edge of which and the inner face of the post the forward edge of the door will become installed. The opposite edge of the door is made as tight by a strip 22 attached to the opposite post 23 of the door opening and provided with a chamfered edge as at 24 for interlocking engagement with a similarly shaped strip 25 carried upon the edge of the door though this particular arrangement of joint forms no part of my present invention.

As a means for locking the door in closed position I provide a gravity dog 26 pivoted as at 2'7 to the door opening face of the post 23, said dog being provided with an inclined projecting lug 28 for normally swinging into the path of the door and which is forced out of the door opening by the inclined upper edge thereof only to drop back over the door when in closed position. The lower free end of the dog 26 is provided with a suitable handle 29, and, if so desired, a pin 30 may be suspended from this handle for installation within a suitable hole 31 in the face of the door post for holding the dog either in or out of operative position.

At 32, I have illustrated in dotted lines a sheet metal apron that might be employed and as being carried upon the inner face of the arm 6, projectthan found. in grain getting in between the two arms or levers and interfering with the operation of same.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

The combination with a grain car having a door opening therein provided with door posts on either side thereof, of a grain door therefore adapted to close the lower part of said opening by resting against said posts, supporting arms pivoted at one end adjacent the top of said door and at their opposite ends to the side of said car, an operating line attached to the upper cen- JACOB MA'I'ISON.