US684281A - Car-roof construction. - Google Patents

Description

N0- 684,28|. Patented 001i. 8, IQUI. L C MARSHALL GAR ROOF CUNSTBUCTIUN.

(Lpplication filed July 8, 1901.

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UN T STAT P T NT OFFICE-Q LEWIS O. MARSHALL, OF EAST WALPOLE, MASSACHUSETTS.

CAR-ROOF CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 684,281, dated October 8, 1901.

Application filed July 8,1901. Serial No- 67A49. (No model.)

To aZZ whom it may concern:

Be it known that I, LEWIS O. MARSHALL, a subject of the King of Great Britain, residing at East Walpole, in the county of Norfolk and State of Massachusetts, have invented new and useful Improvements in Car- Roof Constructions, of which the following is a specification.

This invention relates to a car-roof construction, and especially to the construction of freight-car roofs, the object of the invention being the provision of means for applying to the subroof of a freight-car sheets of metal roofing which while forming a tight joint with the subrafters and ridge-timbers of the roof may be securely maintained in place without being nailed to the car at any point, tothe end that the torsional movements of the car may not cause a break in the roofing-plates and whereby an imperfect sheet may be easily and quickly replaced; and the invention consists in the construction hereinafter fully described and more particularly set forth in the claim.

In the drawings forming part of this specification, Figure 1 is a perspective view of a car-roof embodying my invention. Fig. 2 is a perspective view of a metal roofing-plate constructed according to my invention and is shown more or less shortened. Fig. 3 is a transverse sectional view of a portion of a roof, showing the engagement of the upper end with the ridge-timber and the lower end resting against the outer facia=board.

In carrying out my invention the car-roof is constructed in the manner employed in double-roof constructions-viz., with a subroof (indicated by 2) and an outer roof (indicated by 3.) The space between these roofs is divided into rectangular sections by the subrafters 4: and the ridge-timber 5. The upper edge of the sides of the car is finished off, as usual, by the inner facia-board 6. The ends of the subrafters 4 are flush with the outer surface of the inner facia-boards, and at the ends of the subrafters the blocks 7 are secured, against which the outer faciaboard 8 is removably secured. By this construction there is provided a space between the outer and inner facia-boards which communicates with the space between the inner and the outer roofs,which is divided, as stated,

into sections of an area which may be con veniently covered by one sheet of roofing material.

The working of the timbers of a freightca'r, due to the heavy load carried bythe latter and the inequalities of the road-bed, has made it rather difficult to provide a suitable roofing for freight cars which would not break or work out of place and yet be found not too expensive, while easy of application and renewal. This has been especially difficult where metal roofing material has been employed, it having been especially difficult to properly secure the plates in their position between the roofs in such manner as to in sure their retention in their proper places under all conditions without being directly attached to the car. Furthermore, difficulty has been experienced in making a tightjoint at the junction of the upper edge of the metal plate with the ridge-timber. My invention seeks to overcome these difficulties by providing means for securing the roofing-plates in position between the subroof 2 and the outer roof 3 in such manner as to retain them securely in position without attaching them to the car at any point and in providing means for preventing the wind from driving water up against the side of the ridge-timber 5 and forcing it over the upper end of the plate, and in carrying out my invention the subrafters 4 are provided with the upwardly-inclined slots 9, formed in opposite edges of the subrafter,longitudinally thereof,substantially as shown in my United States Letters Patent, dated July 5, 1898, No. 606,996. These subrafters 4 are spaced a suitable distance apart and extend from side of the inner facia-board 6 to the ridge-timber 5, the sides of the latter being provided with a groove 10, running lengthwise thereof. Before applying a plate of roofing material (indicated in the drawings by 11) the latter is corrugated in the direction running from the side to the ridge of the car. These corrugations are formed on long easy curves and they may extend from the lower edge of the plate up to the opposite edge to their full depth or they may run out toa plane surface before they reach the upper edge, as desired. The edges 12 of the plate parallel with the corrugations are bent upwardly to adapt them to enter the slots 9 in the subtouch but lightly upon the inner surface of 'rugations in the plate.

rafters 4c, The upper edge of the plate is bent backwardly upon itself, as shown at 13, Figs. 1 and 2, said backwardly-curved portion being adapted tofit closely in the groove 10 in the ridge-timber 5, and when the plate is slid into position,with its recurved upper end bearing against the bottom of the groove 10, the lower edge thereof will just clear or at most the outer facia-board 2. The said lower end of the plate 11 is cut back from the lower edge thereof toward the side of the car for a distance equaling nearly the distance between the inner and outer facia-boards,these cutsbe ing made one at each side of the highest point on the convex portions of the corrugations. The metal between said convex portionsthat is to say, that lying opposite the concave portions-is bent downwardly close against the side of the inner facia-board, and thus constitutes an apron 14 at the end of each gutter, formed by the concave portions of the cor- The bending down of these portions of the plate leaves projections (indicated by 15) between them, which projections are considerably narrower and oncupy the highest point of the convex portions, as stated, which bear against the inner side of the outer facia-board 8 and serve to retain the plate 11 in its proper relation to the ridgetilnber 5. All the water which may find its way through the outer roof 3 will be gathered into the concaved portions of the plate 11 and from thence run down over the apron 1i and thus down the side of the car. By removing the outer facia-board any plate 11 may be drawn out and another slipped into its place, no fastening of any kind existing between the plate and the car.

The points where the cuts are made in the lower end of the plate to permit the bending down of the metal between them to form the apron 14 are somewhat above the level of the upper edge of the facia-board 6, and the gutters formed by the concave portions of the plate 11 are of such width and the plate itself has such a pitch that the Water can readily run off over the said aprons before said gutters can be filled far enough to raise the ee4,2si

Water to the level of the two corners of the 56 V such form as to permit its easy entrance in said slot, all as clearly shown in said figure.

This, however, is not as desirable in mode of construction, for the reason that it is very difficnlt to enter the edge of the plate in said slot after pulling out an old plate for thereason that the space between the two roofs'is so narrowand dark that the edge of the plate cannot be readily guided into said slot in case it misses it when first slid in. With the construction shown in Fig. 1, however, no such difficulty is experienced. j

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is- V In a carroof of the class described, the combination with a subroof, of subrafters thereon V I having longitndinally-extending slots in the sides thereof for receiving the edges of a sheet of roofing material, a ridge-timber having a side groove located in substantially the same plane as said slots, a sheet of roofing material whose sides and upper end are adapted to enter said slots and groove respectively; corrugations in said sheet extending to the side of the car, portions of the lower edge of.

the sheet in which the concave corrugations are located being bent back against the side of the car, the portions between the backwardly-bent portions extending across the space between the side of the car and the outer facia-board, whereby the sheet is held in place, substantially as described.

LEWIS O. MARSHALL. \Vitnesses:

' E. A. TAPLEY,

F. A. MoRRILL.

66 then bending the upper edge of the plate in V V

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