US1849787A - Car roof - Google Patents

Description

March 15, 1932. c. D. oNsALL.

CAR ROOF Filed Sept. 19, 1930 lIlIIII/III/ vio Patented Mar. 15, 1932 UNITED STATES MURPHY COMPANY, F NEW PENNSYLVANIA v PATENT.*OFFICEL'i CHARLES nAvIn EoNsAII., Vor PITTSBURGH, `iiENISTSY`I.'vANIA, AsSIciNoE. VTo rf ILU- KENSINGTON, PENNSYLVANIA, A ooEroEATIoN 0E CAE noon1 Appueatign. mea september 19,1930. ASei-*iai No. 482,949. l

This inventionrelates to car roofs of the all-steel riveted-up" type wherein thev roofing sheets extend from side plate to side plate of' the car and are provided with upstanding lianges along their sides, the flanges of adjacent Sheets b-eing rigidly clamped by a seam cover so as together to function as outside carlines. The'principalobjectof the of. It' also consists in a seam constructionV wherein such a seam cover is riveted to the. upstanding side flanges of the Sheets with a space left below the rivets between such seam cover and said upstanding flanges; and it also consists in the parts and combinations of parts hereinafter described and claimed.

In the accompanying drawings wherein like reference numerals refer to like parts wherever they occur,

Fig. l is a plan view Vof a solid riveted up roof conforming to my invention, l

Fig. 2 is a crosssection through a seam thereof at the ridge,

Fig. 3 is a cross sectional view of the plate from which the cap of Fig. 2 is formed,

Figs. 4, and 6 are the cross sectional views of modified designs of seam caps, and l Figs. 4a, 5a and 6a are respectively cross sectional views of the plate from which the I caps of' Figs. 4, 5 and 6 are formed.

The roof illustrated in Fig. 1 comprises sheets l that extend fromV side plate to side plate and have their ends riveted to such side plates 2. rFhe sides of the sheets have raised panels 3 with upstanding flanges 4 along their outer edges. The adjacent upstanding flanges of adjacent sheets abut against each other and are covered by a seam cap or cover 5 consisting of a plate or heavy sheet rebent on itself longitudinally andprovided with out-turned horizontal flanges 6 at its margins. Such seam cover or cap straddles the upstanding flanges 4 of the roof sheets and is secured thereto by horizontally disposed rivets 7 that extend through `both legs'of the Seam cap,whereby the seam cap and the sheet flanges are' clamped'firmly togetherv and 4 constitute, in eflectfanoutsidecarline construction. Y -f l e l Y A. Accordingto the present invention, the seam'co'v'er is made of a plate of various thickness one or more longitudinal'strips'thereof being thicker than the-adj acent strips. The

design of plate illustrated in Fig. f3 isrela` tively thick throughout Vits body portion 8 and relatively thin throughout itsside marthat define', the relatively thick middle orbody portion froml the relatively thin marginal portions. The thick body portion of this de- .spaces lO intervening between the upstand Ving flangesof the sheets and the respective legs oftheseam cover. By, reason of such spaces,y capillary action is preventedand the ,sheets are affordeda'certainleeway for movement, 1n' Case of y great stress thereon. f How'- ever, the blank may be folded lso that'theolfset H- face isoutermost; in which case",` the marginal ginal portions'Q, one of thefaceshavingoffsets j "sign is wide enough to extend below, butonl'y anV portions may, if desired, be made thin enough ,l f

toflex kand letthefsheets move. y Y case, the moreY efficient distribution ofmetal makes it-practicable to reducethe totalweight l lof metal in the roof *without* sacrificingthc In either Vstrength thereof. Preferably the horizontal 'Y flanges 6'of vthe lseamT cover rest on Ithe raised` panel' portions of' the sheets.

1 1 By difiere.tiatingbetwee the thieing'ssf I Y 90,

the body portion-l andthe thickness of fthe marginal .port-ions of4 the seam cover, the

designer of theroof is afforded wide latitude in utilizing his structural materials to thel Y v best advantage in comparison with V.theyrestrictions occasioned-by the'use ofsheetjsand plateslfruniform thickness. Forjinstance, it isobviously desirablethat the sheets and seam," i cover shall be so designed as to cooperate in andvarious p inventions 'have been made taking care of the roof load and other stresses; m0 I l ..59 secured thereto by horizontal rivets, the lower thisend inview. According tothe present invention, the metal in the seam cover can be massed Where it is most ellicient in Vtaking care of stresses. l For instance, in the construction illustrated' in Fig. 1, beam action is involved; that is, the roof sheets are adaptedl and. arranged to take care of tensile stress and the portion of the seam cap above the neutral axiswtakes Yca re of compressive stress, and thev jdesigner, having control over -the'eros's sectional shapeandarea of'the's'eam cover, can ad]ust such cross section to the requirements vof his computations. yIn thisway, hecan mass av considerable amount of metal at the4A top of the seamcover,Where'iit is'most"eiii" yciehntinjaction and tends to raise the level of theY neutrall axis and .thusito renderl the sheets moreelicient in takingcare of tensile-stress. j' Figs. 4,. 5 an'd represent various modifications in the designfof seam cap and. igs. lla, 5d and 6a `represent the respective, plates from. which theyzaremade. The seameap of y Fig.' 4;V concentrates v*considerable metal at the top thereof, the eXtra thickness-beingV on the outside ofthe cap and .resulting from* folding the platein the opposite'direction to that parallellines at opposite sides nof a thickened iatthe uppermost-part thereof. .Signed at New. Kensington,` Pennsylvania,

plate rebent along a line adjacent to its lon-V gitudinal middle line and having horizontal flanges along its sides, said seam cover hav- Y ing rivet holes through its vertical portions, and the side marginal portions of said seam cap being thinner than the body portions for Widths extending almost to the rivet'holes.

5. ,A seam cover for a car roof comprising a plate rebent along a longitudinal line and having horizont-al flanges alongvits'sides, said seam cover having rivet-'holes through its vertical portions, and thenppermostpart of said seam cap being thicker than the flangeV portions. I

6. A seam` cap for a car roof comprlslng a Vrebent platevvith horizontal flangeslalong its sides, said seam cap vhaving rivet holes VAthrough its vertical portion sthe`top ofsuch seam cap and the rivet portions thereof being thicker than the portions fbetvvee'nithem andvt thicker than the side marginal 'portions'of vsaid seam-cap.` f l 7. In'a car roof, a seam'construction comprising roof sheets With upstanding flanges and a seam cap stradd-ling said flangesan'dH secured thereto by horizontal rivets, the'cross sectionall shape of said cap being such that there v is considerable concentration of. metal this-13u11 day of september, 1930..

Ymerits ofthe first'y designfplus special concenl il' tration-of metaljat thetop thereof; The design ofFig.. 6 is similar to that of Fig. 2 With I .grooves formed above the rivets to economize -metaL A The `several lmodifications shown in the Vdrawings are intended `to' serveY only as illustrations ofthe latitude and freedom of' l l .designafforded by thepresent invention; as n i itis obvious thatthe invention'maybe embodied in other designs of seam cap and used with riveted seams Whether the margins of Vthey sheets are paneledor not. f. A ,Y

i -What Iolaimis:

1.' Ina car roof, a seam construction comprlsing roof Y sheets' vwith vupstanding flanges and: a seam. cover straddhng said flanges and Y. portions of Vsaid seam cap below'the rivets kv'being thinner-than the'upper portion thereof. f

i595 oHARLEs 'DAVID BoNsAnnV 2. In aV car roof,aseamconstruetioncomprising roof sheets with upstanding flanges f and a: seam cap. straddling. said. yflanges and securedv theretoby horizontal rivets, the up Y ipermost and rivetV portions of. vsaid seam cap Y being thicker than thelower portionthereof'.l

Y. '3. In a car roof, asealm construction Vcomn prisingroof sheetsrwith upstanding. flanges and a seam cover straddlin'g said flanges and securedV thereto byl horizontal rivets, the upper yportionsV of said seam-cap being `thicker I than thelowerportions thereof? `.4.;'Ina car roof, aseamcover comprisinga g .A

Images