US1556063A

US1556063A - Grating

Info

Publication number: US1556063A
Application number: US524801A
Authority: US
Inventors: Becker Axel
Original assignee: DAUCHY IRON WORKS
Current assignee: DAUCHY IRON WORKS
Priority date: 1921-12-24
Filing date: 1921-12-24
Publication date: 1925-10-06
Anticipated expiration: 1942-10-06

Description

Oct. 6, 1925.

A. BECKER GRATING Filed Dec. 24. 1921 pmnummu Patented Oct. 6, 192.5.

V UNITED STATES isaaeaa PATENT OFFICE.

AXEL BECKER, OF CHICAGO, ILLINOIS, ASSIGNOB TO DAUCHY IRON WORKS, OF

CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS.

GRATING.

Application filed December 24, 1921.

The main objects of this invention are to provide a reticulated metal grating made up of bars having slits of predetermined length cut therein at stated intervals whereby portions of the bar may be offset from the normal plane thereof and attached to adjacent bars so as to secure said bars in uniformly spaced relation; to provide a grating of this kind wherein the spacing is such that it will afford a firm foothold for persons walking thereupon and also permittrucking thereacross; to provide a reticulated grating which is made up of bars of substantially identical construction; and to provide a grating which is simple to manufacture and durable in construction.

An illustrative embodiment of this invention is shown in the accompanying drawings, wherein Figure 1 is a fragmentary perspective view of a form of grating embodying this invention.

Figure 2 is an enlarged fragmentary plan of the same.

Figure 3 is a side elevation of the same.

the line H of Figure 2.

A grating constructed in accordance with this invention involves the use of a plurality of bars parallelly arranged on edge with sheared portions of one bar offset from the normal plane thereof and rigidly attached to the adjacent bars so that said bars are secured together in uniformly spaced relation with the upper edges of all of the bars disposed in the same horizontal plane.

In the specific embodiment herein shown the bars are of identical construction the bars being slit at intervals along their length so as to permit two marginal portions and an intermediate portion to be offset on re- Figure 4 is a transverse section taken on Serial No. 524,801.

spectively opposite sides of the normal plane of the respective bar. These offset portions are shaped so as to have an interfitting arrangement whereby they form spacers for securing the bars in uniformly spaced parallel relation.

Referring to the drawings the bars, which are of uniform rectangular cross section, each have formed therein a plurality of pairs of longitudinally extending slits 2 located at intervals along the length thereof and spaced so as to divide the bar into three equal portions. The two marginal portions 4 and the intermediate portion 5 adjacent each pair of slits are offset from respectively opposite sides of the normal plane of the bar. These offset portions are of arcuate form and arranged so that when the bars are assembled to form a grating the intermediate portion 5 on one bar fits in between and is adapted to be welded to the marginal offset portions 4 of the adjacent bar.

Preferably the marginal portions 4: are offset first to one side of the normal plane of the bar and then to the other side as is also the intermediate portion as clearly appears from Figures 1 and 2 of the drawings.

In making up a grating of this kind a predetermined number of the bars 1 are arranged on edge side by side 'so that the ends of the bars are adapted to rest upon flanges of a suitable frame (not shown). The bars are placed relative to each other so that the intermediate ofl'set portions 5 of one barv fit in between the marginal offset portions 4 of the adjacent bars. These interfitting 011'- set portions are spot welded together with suitable well known mechanism'whereupon the bars are rigidly secured in uniformly spaced parallelrelation to form aunitary structure. The size and arrangement of the offset portions is such that the openings in the finished gratings are all more or less uniform whereby the grating presents a neat and ornamental appearance. The edges of the bars are all disposed in the same horizontal plane and are arranged sufficiently close together to provide a firm and level foot-hold for persons treading thereon. The undulated character of the offset portions serves to secure a foot on the grating.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted Without departing from the spirit of this invention as defined by the following claims.

I claim 1. A reticulated grating Comprising a plurality of bars arranged on edge said bars being slit at intervals along their lengthsand each bar having portions thereof adjacent to said slits bodily offset in opposite directions from the normal plane of the intermediate unslit part of the respective bar, the offset portions of one bar being rigidly secured to the adjacent bars whereby said bars are retained in uniformly spaced parallel relation.

2. A reticulated grating con'iprising a plurality of bars arranged on edge said bars being slit at intervals along their lengths and each bar having portions thereof adjacent to said slits bodily offset in opposite directions from the normal plane of the intermediate unslit part of the respective bar, the offset portions of one barbeing adapted to have interfit-ting relation with the offset portions of the adjacent bars whereby said bars are rigidly secured together in uniformly spaced, parallel relation.

A reticulated" grating comprising a plurality of bars arranged on edge each of said bars having pairs of slits'formed therein at intervals along the length thereof, the marginal port-ions. of said bars adjacent to said slits being offset to one side of the norvmal plane of the bar and the intermediate portion being offset to the opposite side, the

offset portions of one bar engaging the off set portions on the. adjacent bars whereby said bars are secured together in uniformly spaced parallel relation.

4. A reticulated grating comprising a plurality. ofbars arranged' on edge each of said bars having pairs of slits formed therein at intervals along the length thereof, the marginal portions of said bars adjacent .to

said slits being offset to one side of the normal plane of the bar and the intermediate portion being offset to the opposite side, the intermediate offset portions of one bar fitting between and being adapted to be fastened to the marginal offset portions of adjacent bars whereby said bars are rigidly secured together in uniformly spaced parallel relation.

5-. A reticulated metal structure compris ing a plurality of bars arranged on edge, said bars being slit at intervals along their length and each bar having portions thereof adjacent to said slits bodily offset from the normal plane of the intermediate unslit part of the respective bar, the offset portions of one bar overlapping and interfitting with the offset portions of the adjacent bar and being welded at said overlapping interfittingportions so as to rigidly secure said bars together. 7

6. A reticulated metal structure comprising a plurality of bars arranged on edge, said bars havinggrou-ps of slits formed therein at intervals along their lengths, each group ofslits comprising-a plurality of parallel slits arranged one above the other between the edges of the bar, each bar having portions thereof between said slits bodily offset in opposite directions from the normal plane of the intermediate unslit portion of said bar, the offset portions of one bar overlapping and interfittingwith the offset portions of the adjacent bar in planes intermediate and parallel to said bars, and being welded at said overlapping interfitting por t=1ons so as to rigidly secure said bars together.

of the offset portions of the-next bar and said overlapped portions being rigidly fastened together.

Signed at Chicago this 20 day of Dec.

' AXEL BECKER,