US1275477A - Grain-car door. - Google Patents

Description

w. P. RUBLE & w. B. STEVENS.

GRAIN CARDOOR. 7 APPLICATION FILED FEB- 27,1917.

1,275,477. Patented Aug. 13, 1918.,

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GRAIN CAR DOOR.

APPLICATION FILED FEB-27,1917.

1,275,477. Patented Aug. 13, 1918-.

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UNITED STATES PATENT OFFICE.

WILLIAM P. RUBLE AND WILLIAM B. STEVENS, F ESMOND, NORTH DAKOTA.

GRAIN-CAR DOOR. I

Specification of Letters Patent.

Application filed February 27, 1917. Serial No. 151,248;

' of North Dakota, have invented certain new and useful Improvements in Grain-Car Doors, of which the following is a specificat1on.'

This invention relates to doors of the kind employed on grain cars and which are so constructed and mounted that they may be raised and lowered as required and .may while being lowered be moved in guides beneath the car floor in such manner as to hold the top or upper edge of the door at any desired elevation while the lower portion of the door is moved entirely out of sight and out of the way.

The objectof our invention is to provide novel and efiicient means for connecting the door sections with each other and for raising and lowering them.

The door which we employ-is constructed of a series of sections having their upper and lower edges hinged together and these sections are adapted to be moved in guides arranged vertically in the doorway and which are extended beneaththe-floor of the car. The door sections are formed with teeth on their opposite edges with which engage worms that are mounted to turn about vertical axes and which are operated by worms carried by a horizontal shaft extending from one side of the doorway to the other and provided with a crank, hand wheel, or other suitable means for turning it. The organization is such that compara tively little friction is produced while the door is being raised and lowered. The ver tical worms operate in oppositionto each other and raise the door without putting any strain or pressure on the guides and therefore the door may be raised and lowcred with a minimum expenditure of power and with great facility. Worms are of course more powerful than ordinary sprocket gearing and by having the worms engage teeth on the opposite ends of the door sections pressure or friction which would other? wise be produced is eliminated.

In the accompanying drawings,

Figure 1 shows in elevation a portion of a grain car to which our improved door is applied. Some parts are shown in section, some in dotted lines and other parts are broken away in order to more clearly illustrate the invention Fig. 2 shows a horizontal section on the line 22 of Fig. 1.

Fig. 3 shows a vertical section on the line 3-3 of Fig. 1. a

Fig. l is a detail view on an enlarged scale and on the section indicated by the line 4-4 in Fig. 1.

Fig. 5 is a view on an enlarged scale showing two sections ofthe door and illustrating how the sections are hinged together and Patented Aug. 13, 1918. y

how they are formed with teeth at their edges.

' Fig. 6 is a perspective view on an enlarged scale of portions of two of the door sections and indicates how these sections are grooved vertically.

The car body as a Whole is indicated by A, the car floor being shown at a. The doorway is provided on opposite sides with runways or guides B for the car'door D and'these guides are continued or extended beneath the floor a, as shown most clearly in Fig. 3.

The door D is composed of a series of slats or sections d, hinged to each other at their upper and lower edges. Preferably these sections are made of sheet metal, the lower portion of each section being formed with a socket d, which receives the upper portion of an adjacent section which is enlarged by being bent or doubled upon itself asindicated at (Z The construction as will be observed is such that the sections may be readily connected and disconnected when the two sections may be separated. When the sections are passlng through the curved portion 6 of the guides B the walls of the guide hold the sections in place so that they cannot separate. The manner in which this is done is indicated in Fig. 3. The hinged joints d, 03 do not extend from one end of the sections to the otherand'do not enter the vertical portions of the guides B. By reference to Fig. 1 it will be seen that the hinged parts d and ol are much shorter than the section and the opposite ends of the sections extend into the guides B in the manner more clearly indicated in Fig. 2. The guides are provided with vertical flanges b which enter the vertical grooyes gage the teeth (i on the opposite ends or vertical edges of the door sections. The shafts e carry worm wheels F with which engage worms G on a horizontal shaft H supported in brackets h and which extends from one side of the doorway to the other. Said shaft may be provided with a crank I, a hand wheel J, or any other suitable operating m echanism. By merely turning the shaft H the door may be raised and lowered with great facility, the thrust of the-worms E being endwise in each section and both the worms operating'to raise the door in a vertical direction without exerting pressure between the door sections and the guides.

We claim as our invention:

1. A car door provided on each opposite side edge with a vertically arranged series of teeth, in combination with worms mounted to turn about vertical axes and which enga e the two series of teeth for raising and owering the door.

2. A car door provided. on each opposite raising and lowering the door, and means for simultaneously operating said worms.

3. A car door provided on each opposite side edge with a vertical series of teeth, worms mounted to move about vertical axes and engaging said teeth for raising and lowering the door, a horizontally arranged operating shaft and gearing between said shaft and said Worms whereby they are simultaneously operated.

4. A car door made in sections hinged together at their upper and lower edges and having vertically arranged teeth at their opposite ends, guides in the sides of the doorway and beneath the car floor in which the sections move, worms mounted to turn about vertical axes and engaging the toothed ends of the door sections, a horizontally arranged operating shaft, and worm gearing between this shaft and the vertically arranged worms which raise and lower the car door.

In testimony whereof we have hereunto subscribed our names.

WILLIAM P. RUBLE. WILLIAM B. STEVENS.

Witnesses: I CAnLos LAASTEAGUA ARTHUR BOHOLDT.

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