US2034081A

US2034081A - Car roof

Info

Publication number: US2034081A
Application number: US28818A
Authority: US
Inventors: Bonsail Charles David
Original assignee: PH Murphy Co
Current assignee: PH Murphy Co
Priority date: 1935-06-28
Filing date: 1935-06-28
Publication date: 1936-03-17
Anticipated expiration: 1953-03-17

Description

Patented Mar. 17, 1936 CAR Charles David Bonsall,

ROOF4 Pittsburgh, Pa., assignor to P. H. Murphy Company, New Kensington,

Pa., a corporation of Application JuneA 28,

6 Claims.

This application is a continuationA in part of my copendingapplication for patent for Car roof, Serial No. 659,491, led March 3, 1933. The invention consists in the arrangements and combinations hereinafter described and claimed.

In the accompanying drawing, which forms part of this specification, and wherein like symbols refer to like parts wherever they occur,

Fig. 1 is a plan view of a part of acar roof embodying my invention,

Fig. 2 is a sectional view crosswise of the car on the line 2-2 of Fig. 1,

Fig. 3 is a sectional view lengthwise of the car on the line 3-3 of Fig. 1, and

Figs. 4, 5, 6, '7, 8 and 9 are views similar to Fig. 3 Villustrating modications.

The construction illustrated in Figs. l to 3 comprises metal side plates I, carlines 2'whose ends are secured to the side plates and roof sheets which extend fromsid-e plate to side plate and from carline to carline. The endsV of the roof sheets are preferably turned downand secured to the outer faces of the carlines by welds 3. of added metal that join the end edges of the sheets to the outer faces of the side plates.

In the construction illustrated in Figs. 1 to 3, the carlines 2 are of channel shape with hori- Zontal anges 2a extending laterally from the tops thereof; and the roof sheets comprise a series of plain wide roof sheets 4 that span from carline to carline and a series of plainnarrowroof sheets 5 that alternate with the wide sheets and are located above the respective carlines. The wide sheets 4 lap the iiang-es 2a. of the carlines what narrower than the distance between successive wide sheets and are arranged with their edges spaced somewhat from the -edges of the adjacent wide sheets. The spaces between the edges of the adjacent sheets are filled with welds 6 of added metal which secure the edges of adjacent sheets together and also to the tops of the carline anges.

The construction illustrated in Figs. 1 to 3 has several advantages. It has all of the advantages that come from welding as compared with riveting and it makes use of plain sheets which do not need to be accurately sized as to width. For this reason, the invention is particularly applicable to the reconstruction of roofs of the type wherein successive roof sheets meet or lap at the carlines. Roofs of this type usually fail by the tearing or rusting out of their edge portions while the main body of the sheet is still in sound condition. By shearing off the defective marginal 2 and the intervening narrow sheets 5 are some- Pennsylvania 1935, Serial No. 28,818

portions of such sheets, they are still let wide enough for use as the wide sheetsof the construction above described. In the case of .n old sheets that are too badly torn for use as wide sheets, they can be sheared to produce one ormore of the narrow sheets of my construction.

Another advantage of the construction illustrated in Figs. 1 to 3 is that the narrowroof sheet cooperates with the channel carline to constitute a hollow box girder in which the narrow sheet functions as the top plate. As this top plate is a separate piece from the wide roof sheet, it may be made of whatever thickness the designing engineer may think advisable to meet the engineering requirements of the structure. In the modification illustrated in Fig. 4, the narrow sheet-.or top plate 5a of the hollow box girder is considerably thicker than the wide roof sheets 4;

The construction illustrated in Fig. 5 is generally similar to the construction of Figs. 1 to 3 exceptithat the modification illustrated'in Fig. 5 uses the same Iianges and channel-shaped carline as-the construction of Fig. 3 and secures the edges of adjacent sheets 6 togetherand to the carline. byv welds 'I that fill the spaces between adjacent sheets. In this modication, one oi' the Sheetsis wide enough to reach from one carline to the far ange of the-next adjacent carline, where its end is secured to the carline and to the adjacent sheet. In this construction, adjacent sheets may be of equal width or of unequal'width. When theyV are of unequal width, a narrower sheetis-wide enough to overlap the edges of adjacent carlines far enough for convenient welding. This arrangement of wide and narrow sheets is particularly advantageous in that it makes it possible to salvage wide sheets with torn edges by trimming olf the torn portions.

The modication illustrated in Fig. 6 is similar to the construction of Fig. 5 except that the sheets consist of two series alternating with each other. The sheets of one series are plain thick sheets 8, that rest on top of the carlines 2 and the sheets of the other series are thin sheets 9 whose body portions are at a lower level and which are provided with upstanding angular ilanges 9a whose edges overlap the margins of the adjacent carlines and are welded thereto and to the edges of the adjacent sheets by single welds Il).

In the modifications illustrated in Figs. 7, 8 and 50 9, the carlines II are of inverted U-shape. In the construction of Fig. '7, plain roof sheets I2 rest on the horizontal top portion of the carline with their edges spaced apart and the spaces lled with welds I3 that secure adjacent sheets to- 55 gether and to the carline. Aside from the usual advantages of welding over riveting, this arrangement makes it possible to use old sheets with torn edges by trimming off the torn portions and still leaving sheets that are wide enough for the purpose. It is particularly noted that the location of the weld crosswise of the carline may be shifted to suit the sheets, whereas the requirements for riveting fix the location of the rivet line within narrow limits. Besides, riveting requires one workman inside of the car as well as another workman outside of the car, whereas a single Welder outside of the car will make a better joint.

In the modification illustrated in Fig. 8, the sides of adjacent sheets I4 lap the anges Ila at the bottom of the intervening carline II and are respectively welded by welds I5 to said flanges. The particular merit of this design is that it permits the use of narrow sheets and is, therefore, well adapted for salvaging old sheets with torn edges by trimming oir the torn portions.

The modication illustrated in Fig. 9 comprises an inverted channel-shaped carline II with lateral flanges IIa and plain roof sheets I6 that extend underneath the carlines and have their meeting edges welded together as at II, underneath the carlines. Additional welds I8 of added metal secure the edges of the carline flanges to the upper faces of the roof sheets. In this modi-v fication, the roof sheets cooperate with the carlines to form hollow box girders that increase the stiifness and strength of the structure.

What I claim is:

`1. Acar roof construction comprising car side plates and a unitary self-supporting roof secured thereto, said roo-f consisting of alternately wide and narrow roof sheets arranged side by side with narrow spaces intervening, channel-shaped members below and of greater width than the narrow sheets and with lateral flanges extending beneath the margins of the wider sheets and welds filling such spaces and uniting the edges of adjacent wide and narrow sheets together and to said members.

2. A car roof construction comprising vcar side plates and a unitary self-supporting roof secured thereto, said roof consisting of alternately wide and narrow roof sheets arranged side by side than the wide sheets and cooperating with the channel-shaped members as the top chord of the hollow box beam.

3. A car roof comprising side plates, carlines secured thereto, roof sheets supported directly and entirely by said side plates and carlines and Whose ends are secured to the side plates and whose sides are secured to the carlines, said carlines comprising a body portion with lateral flanges, said roof sheets having flat horizontal side margins which are spaced apart from each other and rest iiatwise on top of the flanges of the carlines to which they are secured, and welds of added metal uniting said sheets to said flanges, said welds being opposite the edges of the sheets and opposite the upper faces of the flanges of the carlines united thereby.

4. A car roof comprising side plates, carlines secured thereto, roof sheets Whose ends are secured to the side plates and whose sides are secured to the carlines, said carlines comprising a hollow body portion with lateral flanges, said roof sheets being of less width than the distance between the body portions of adjacent carlines and having at horizontal margins that rest on top of the flanges of adjacent carlines, and continuous welds of added metal located above said flanges and uniting said sheets to said flanges, said welds being opposite the edges of the sheets and opposite the faces of the carlines united thereby.

5. A car roof comprising side plates, carlines secured thereto, roof sheets whose ends aresecured to said side plates and whose sides are secured to the carlines, said carlines comprising a fiat horizontal middle portion and vertically disposed sides with lateral flanges, said roof sheets being of less width than the distance between the sides of adjacent carlines and having flat margins that rest atwise upon the flanges of adjacent carlines, and continuous welds of added metal uniting the edges of the sheets to the tops of said anges.

6. A car roof comprising side plates, carlines of inverted U-shape with flat tops and with outwardly extending anges at the bottom thereof, roof sheets extending from side plate to side plate with their ends secured to said side plates and with flat horizontal side margins resting on top of the flanges of adjacent carlines and spaced I from the vertical side portions thereof and continuous welds of added metal uniting the edges of the sheets to said fianges whereby the carlines cover the spaces between adjacent sheets.

CHARLES DAVID BONSALL.