US1231049A

US1231049A - Car-roof.

Info

Publication number: US1231049A
Application number: US76980713A
Authority: US
Inventors: Clinton C Murphy
Original assignee: PH Murphy Co
Current assignee: PH Murphy Co
Priority date: 1913-05-26
Filing date: 1913-05-26
Publication date: 1917-06-26
Anticipated expiration: 1934-06-26

Description

C. C. MURPHY.

CAR ROOF.

APPLICATION FILED MAY 26. I913.

?atented 311116 2(5, 1917.

2 SHEETS-SHEET 1.

C. c. MURPHY.

CAR ROOF.

Patented June 26, 1917.

2 SHEETS SHEET 2.

CLINTON C. EUEPHY, OF CHICAGO, ILLINOIS, ASSIGNOB TO P. H. MURPHY COMPANY, OF PABNASSUS, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CABrBOOF.

Specification of Letters Patent.

Patented June 26, 1%17.

Applicationfild May 26, 1913. Serial No. 769,807.

To all whom it may concern:

Be it known that I CLINTON C. MURPHY, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Car-Roofs, of which the following is a specification.

This invention relates particularly to wooden sheathed roofs provided with a water and fire-proof covering of metal plates. Such roofs are commonly referred to as outside metal roofs, and are largely used on freight cars.

The object of this invention is the production of a serviceable and cheap part-cylindrical or circular roof, as distinguished from a double pitch roof which has two flat sides slopin from the ridge to the eaves of the car. A f u tion is the provision of means for securing the metal roof sheets and the running boards and their supports in place upon the top of a car without interfering with the slight movements of the roof sheets necessary to enable them to accommodate themselves to the constantly changing shape and position of the roof substructure when the car is in service. A further object of this invention is the provision of means for attaching the roof sheets and parts associated therewith to the roof substructure in such manner as to prevent the entrance of water into the car at the point of attachment.

With the foregoing objects in view, this invention consists in a circle or continuously curved car roof, and in a supporting framework particularly adapted for a curved roof; and furthermore in an arrangement of carlines, purlins and roof sheathing constituting a trussed arched supporting framework for a car roof. The in vention also consists in a roof framework adapted for supporting a variety of shapes of continuously curved roofs on double pitch carlines of ordinary type and standard dimensions. The inventlon also consists in the form and arrangement of the metal covering plates, or roof sheets as they are commonly termed, and in the means for securing the roof sheets upon the roof sheathing whereby they are positively located in lace thereon at their centers and free to move slightly thereon elsewhere, especially along their sides and near their ends. The invention consists further in the means for rther object of this inven-- preventing ingress of water into the car around the edges of the roof sheets, and through the points of attachment of the roof sheets and running board supports to the roof substructure.

Other objects and details of the invention appear in connection with the description of the freight-car roof shown in the accompanying drawings, which is constructed in accordance therewith; and the novel and characteristic features of the invention, irrespective of the forms in which they may appear, are more fully pointed out in the appended claims.

In the drawings, in which like characters wherever they appear throughout the several views designate the same parts of the structure, Figure l is a top plan view of the end of the car, with the roof sheets and running boards partly removed to disclose the roof sheathing and supporting frame members comprising the roof substructure; F ig. 2 is a transverse sectional view of the car roof, following the line 22 of Fig. 1, showing a carline and end plate of the car in side elevation; Fig. 3 is a sectional view to a larger scale,'on the line 3-3 of Fig. 1, showing the ridge portion of the roof at the point of attachment of a roof sheet, the securing bolt being shown partly in elevation; Figs. 4 and 5 are enlarged longitudinal sectional views of the car roof at the ridge of the car, on the lines 4- 1: and 55 of Fig. 1; Fig. 6 is an enlarged transverse sectional view of the eaves of the car on the line 6-6 of Fig. 1; and Fig. 7 is a similar sectional view on the line 7-7 of Fig. 1, showing a modified form of roof sheet and flashing strip.

In the car roof illustrated in the drawings, the carlines 11 are of metal, approximately T-shape in cross-section, arranged across the car at intervals of three feet or so from end to end thereof. The ends of the carlines are bolted or otherwise secured to the side plates 12, which are notched to receive them.

The carlines are double pitch carlines of ordinary type, that is, they are straight except for a bend at the middle to give them pitch. The two ends of each carline are straight and slope with the pitch of the roof from near the ridge of the car to the eaves, where they are supported on the side plates. A ridge pole 13 extends from end to end of the car over the middles of the carlines, to which it is bolted, and is secured at its ends in the end plates 14. Purlins 15, two on each side of the ridge pole, likewise extend. from end to end of the car over the tops of the carlines and are securely bolted thereto. The top faces of the side plates, purlins and ridge pole are shaped to conform to a vertical arc spanning the car from side to side and springing from the upper outer corners of the side plates. The curvature of this are is made to conform to the desired contour and slope or pitch of the roof. The thick- SlOPQ'IIlGdSUX'Ed in the ratio of the vertical rise of the roof with respect to one half of the distance between the eaves of the car, whereby the same carline may be used for roofs diflering'in curvature and pitch.

The roof sheathing 16 is nailed upon the tops of the side plates, purlins and ridge poles, the boards being arranged diagonally across the car and bent to conform to the shape of the roof. The diagonal arrangement of the boards results in a stifl'er roof horizontally than one wherein the boards run either straight across the roof from side to side of the car or lengthwise thereof parallel to the ridge pole, because the diagonal roof boards brace the roof structure against forces tending to twist it out of square. Moreover, it is easier to bend the boards to the curve of the roof where they are arranged diagonally, because the boards are longer and the curvature of each board is not as great as where they run straight across the roof from side to side of the car.

The effect of the combination of double pitch carlines with the curved sheathing extending across the car from side plate to side plate is to stiffen the roof vertically. The sheathing boards, purlins (including the ridge pole), and carlines together form an arched truss, of which the sheathing boards and carlines constitute the top and bottom chord members, respectively.

The roof sheets 17 are galvanized sheet metal, .usually low-carbon steel, having some flexibility. They are long enough to extend from caves to caves, and are arranged side by side on top of the roof sheathing the full length of the car. Their ends 18 are turned under and preferably are hooked into the rebent flanges 19 of the flashing strips 20 which are nailed along the eaves of the car from end to end thereof, and which may extend also across the ends of the car if desired.

The side margins of the roof sheets are flanged up and the edges turned down to form hollow upstanding flanges. On one side ofthe sheet the edge is turned in and terminates above the main part of the roof sheet. ()n the other side of the sheet the aaenoae edge is turned out and doubled under to inclose the inturned edge of an adjacent sheet, as shown in Fig. 5, thereby forming a flexible water-tight seam 21 between the two roof sheets. These flanges are formed before the sheets are assembled on .the roof, and in assembling the sheets they are slipped endwise into engagement and then dro ped in place on the roof substructure. The flashing strips 20 are easily engaged with the turned-under ends of the roof sheets by lifting the ends of the sheetsafter they have been assembled on the roof substructure. The ends of the seams 21 are covered by hood caps 22, secured to the car'sides, to keep water from entering the car at these points. 7/ The hood caps also prevent the roof sheets from being blown ofl the roof in case the flashing strips are not strong enough to hold them down. The end roof sheets are loosely secured by means of angle clips 23 which are nailed to the ends of the cam-and which project over the side margins of the end sheets. Similar clips 24 are fastened to the sides of the car near its ends, and these clips overlie the end sheets near their corners, as shown in Fig. 7

The roof sheets are securely fastened to the roof substructure at the ridge by means of bolts 25 passing through central holes 26 in the upwardly projecting bossed portions 27 at the center of each sheet. These holes 26 are larger than the bolts, and are surrounded by upstanding flanges 28. Beneath the roof sheet bosses are placed sheet metal pivot plates 29 loosely fitting therein, and the pivot plates have upwardly flanged central holes'30 snugly fitting around the bolts 25. The bolts 25 are provided with collars 31 surrounding the flanges 26 of the holes in the roof sheets to prevent entrance of water into the car at these points.- The flanges 30 on the pivot plates prevent water which may find its way between the collars of the bolts and the roof sheet flanges from following the bolt hole into the car.

The running boards 32 are nailed or otherwise secured to and supported on saddles 33 which rest directly on the roof sheets, and which are secured in place by the bolts 25. The saddles 33 are recessed on their under sides to clear the bosses 27 in the centers of the roof sheets. The running boards are also nailed to and supported on saddles 3t which are arranged intermediate the saddles 33 and merely rest on the roof sheets without being secured to the roof substructure. The saddles 34 are grooved longitudinally on their under sides to straddle the upstanding hollow seams 21. At the ends of the car running boards are carried on brackets secured to the ends of the car below the end fascia board or flashing strip.

It is evident from the above description that a circle car roof built in accordance with this invention is much stitfer than a menses.

double pitch roof on account of the curving of the roof boards diagonally across the framework from one side plate to the other; also the roof sheets are pivotally secured on the sheathing in such away as wholly to prevent their creeping on the roof, but to permit of their moving suiiiciently to accommodate themselves to any ordinary distortion of the car frame; and, furthermore, the entrance of Water into the car, either at the points of attachment of the roof sheets and running board supports or around the margins of the sheets, is entirely prevented. Moreover, the only points where the roof sheets are clamped by metal parts which might wear ofi' the galvanizing and thus I result in rusting out the sheets are the middle points of the sheets, and according to this invention, at these points there is practically no movement whatever of the sheets with respect to the clamping means; consequently, there is no place where the roof sheets are more subject to wear and possible failure from this cause than elsewhere, and

the life of the roof is thereby prolonged.

Althoughthe car roof shown in the accompanying drawings has been described as a typical embodiment of this invention, the

invention is not restricted in' all of its parts in the segmental to car roofs of the type shown.

What I claim asmy invention is as follows:

'1. The combination in a car of transverse sheathing forming a curved arch extending from side plate to side plate and secured thereto, said sheathing being supported on a frame work consisting of carlines forming one or more chords of the arch, and purlins supported on the carlines in'the segmental space between said carlines and sheathing, the thickness of the respective purlins conforming t0 the depth of the segmental space adjacent thereto whereby their top faces conform to the curved undersurface of the sheathing.

2. The combination in a car of transverse sheathing forming a'curved arch extending diagonally from side plate to side plate and supported on a frame work consisting of carlines forming one or more chords of the arch, and purlins supported on the carlines lines and sheathingythe thickness of the respective purlins conforming to the depth of the segmental space adjacent thereto whereby their top faces conform to the curved under surface of the sheathing, and fastenings for rigidly connecting the sheathing. and the side plates and purlins.

3. A car roof arched to a continuous curve and supported-on a frame consisting of side plates and purlins, double pitch carlines secured to the side plates and purlins, the purlins projecting above the carlines and having their top faces-conforming to the curve of space between said car the roof, and continuous roof members bent "t6 the curvature of the roof extending across plates, double pitch carlines secured to the side plates, and purlins supported by the carlines, the vertical thickness of the purlins and side plates being such that their top faces lie in a curved surface parallel to the contour of the roof, and roof sheathing secured to said side plates andpurlins, said roof sheathing comprising roof boards crossing the car diagonally from side plate to side plate.

5. A car having a roof covering consisting of roof sheets extending from eaves to eaves in upwardly curved arcs, the side margins of said sheets being continuous and flanged and self-interlocking to form flexible waterproof seams between adjacent sheets, said'seams extending from eaves to eaves without interruption, and means at the ends of said roof sheets cooperating therewith for securing said sheets upon the roof substructure, and preventing entrance of water 1nto the car under the ends of said sheets, said meansbeing adapted to permit lengthwise and sidewise movement of said sheets.

6. A car roof having a roof covering consisting of roof sheets extending from eaves to'eaves in upwardly curved arcs, the side margins of said sheets being continuous and flanged up and rebent in the shape of inverted channels, said channels of adjacent sheets being superposed and forming loose joints or-seams between adjacent sheets, said seams extending from eaves to eaves without interruption, the ends of said sheets be' ing hooked under and engaging flashing strips which are secured along the eaves on top of the car for movably securing said sheets upon the roof substructure and preventing entrance of water into the car underthe ends of said sheets. V

7. A pivotal securing means for a metal roof sheet provided with a hole l1 Wing an upturned periphery, said securing means comprising a part smaller than the hole in the roof sheet and adapted to pass through the same,'a collar projecting from said securing means and having a downturned periphery adapted to embrace the upturned periphery of said roof sheet hole, and a loose member adapted to engage the under side of said roof sheet and having an upturned flange fitting said securing member within the downturned periphery of said collar.

' 8. A pivotal securing means for a metal roof sheet provided with a hole having an upturned periphery, said securing means comprising a part smaller than the hole in the roof sheet and adapted to pass through the same, a collar projecting from said securing means and having a downturned periphery adapted to embrace the upturned periphery of said roof sheet hole, and a loose member adapted to engage the under side of said roof sheet and having a central hole fit- 10 ting said securing member, said loose mem her and roof sheet being formed with bosses concentric with said securing member and adapted to meet together to prevent relative lateral movement of the roof sheet with respect to the securing member.

CLINTON C, i: PHY.