US2651978A

US2651978A - Antislip decking

Info

Publication number: US2651978A
Application number: US61865A
Authority: US
Inventors: George W Causey
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-11-24
Filing date: 1948-11-24
Publication date: 1953-09-15
Anticipated expiration: 1970-09-15

Description

l 1953 e. w. CAUSEY 2,651,978

ANTISLIP DECKING Filed Nov. 24, 1948 2 Sheets-Sheet 1 Sept. 15, 1953 G. w. CAUSEY 2,651,973

ANTISLIP DECKING Filed Nov. 24, 1948 2 Sheets-Sheet 2 Patented Sept. 15, 1953 UNITED STATES PATENT OFFICE 3 Claims.

The principal object of the present invention is the provision of a new and improved surface which will prevent the slipping of workmen or the shifting of freight, cargo or material.

For instance, at airfields the airplanes upon landing are subjected to careful examination, movable scafi'olds being run beneath the wings and around the plane so that a careful inspection may be made. The men moving about on the top decks of such scaffolds are liable to fall to the ground unless some antislip provision is made. For this purpose my invention provides a portable and removable decking, comprising units of suitable size and weight which are easily handled for installation and removal, and which may be stored in compact form when not in use.

Again, in loading heavy cargo in the holds or on the decks of ships, such cargo, as machinery, must be secured against shifting in rough weather, and the methods of lashing in common use frequently fail. My invention provides adequate prevention against cargo shifting.

My invention also may be used for preventing the shifting of heavy freight in transportation by railway and by truck.

My improved antislip deck is composed of a plurality of longitudinal and transverse metal bars, preferably disposed at right angles to each other and interengaged at their intersections by coacting slots, the joints being welded and the upper surfaces of the bars being provided with a new and improved character of sharp engaging portions, which provide an eflicient antislip fioor surface for the feet of the workmen and also for the bottom surface of the cargo or load.

The intersecting longitudinal and transverse bars are of proper length to be provided with a perimetral frame to which the ends of the bars are welded, thus forming a unit of suitable size and weight to be conveniently handled for installation, removal and storage.

Other novel and important features and arrangement of parts will appear in the following description.

In the accompanying drawings, wherein is illustrated the practical embodiment of the principles of my invention,

Fig. 1 is a side elevation of one of the intersecting bars, for instance, a longitudinal bar;

Fig. 2 is a like view of one of the other or transverse bars;

Figs. 3 and 4 are like views, showing a modified form of the longitudinal bars and of the transverse bars, respectively;

Fig. 5 is a broken perspective showing the longitudinal bars and the transverse bars permanently assembled;

Fig. 6 is a sectional detail showing the assembled relation of the longitudinal bars, the transverse bars and a portion of the perimetral frame of the unit;

Fig. '7 is a broken top plan view of the assembled section, and

Fig. 8 is a bottom plan view of the same.

Referring first to Fig. 1, the bar 10 is formed of a flat piece of bar or strip-steel or other metal and has a straight bottom edge, the gauge of the material being selected in accordance with the burden to be supported by the deck. Thus in some instances, where heavy cargo or freight is to be carried, a quarter-inch gauge might be selected, while for a deck to be used for supporting workmen an eighth-inch gauge or less would be sufficient.

The bars are cut to the proper length. I prefer to produce my antislip deck in units of such dimensions and weight as to be conveniently handled and stored. Thus the units may be eight feet long and one foot wide.

Assuming the bar In to be one of the longitudinal bars, its length is such as to fit between the end members of a perimetral frame hereinafter described.

The top edge of the bar is provided at regular intervals with upward extensions H which are cut out at their centers to form upwardly open arcuate recesses 12 which are preferably slightly greater than semicircular. The top edges i3 of the extensions H are inclined downwardly away from the recesses E2 to form with the edges of the latter the teeth I l. At their outer ends the edges l3 meet with the upper ends of the descending edges 15 which extend downwardly at an incline toward the recess l2 and meet the horizontal edge 16 of the bar, thus providing the teeth H at the outer ends of the edges 13. The edges E5 of the bar are in the same horizontal plane as the bottom of the recesses l2.

Iii indicates vertical slots cut in the bar from above, one being centered intermediate of each pair of adjacent extensions l I. Like slots I!) are cut in the bar from beneath, one of said slots being centered under each of the recesses l2. The slots l8 extend down half Way through the reduced height of the bar between the upward extensions ll and the slots [9 are out upwardly to the same extent from below.

The slots 18 and I9 are of proper Width to receive the transverse bars of the same gauge as the bars I0.

3 In Fig. 2 I illustrate at 20 the type of bar to be assembled with the bars in angular relation thereto. The bars 20, hereinafter referred to as the transverse bars, are likewise provided with equally spaced upward extensions I of equal elevation, and having cut out recesses 12, teeth I4, inclined edges l3, teeth l1, downwardly extending inclined edges and horizontal edges I5. However in the case of the transverse bars 20, the upwardly extending slots, shown at 2! are centered between the upward extensions l I while the downwardly extending slots 22 are formed at the bottom of the recesses l 2.

Thus, as illustrated in Figs. 5 and 6, the. slots.-

2! of the bars 28 are fitted downwardly over the slots is of the bars l0, while the slots- Idofthe bars H] are fitted downwardly over the.- slots. 22 of the bars 20, thus forming the grids shown in the drawings. After the bars are thus assembled; th teeth it are disposed in groups of four directedtoward a common center the vertical axis of the two associated recesses l2" of. the inter,- sccting bars, while the teeth H. are. also: disposed ingroups of four which face outwardly from the common center. The bars, are then welded at their intersections along the edges of the engaged slots;

In Figs. 3 and 4 I illustrate the modified: arrangement of the-slotsin the'longitudinal bars, indicated at 23, Fig. 3', and'inthe transverse bars indicated at 26, Fig. 4; In the case of the longitudinal-bars 23', the slots 25 arecut in the bottom of therecesses l2 and the slots 26 are cut from above and centered between said recesses, while in" the case-of the transverse bars 2% the correspending slots 2'!- center vertically with the recesses l2 andthe slots 28 centered between the slots 27 are cut upwardly in the bar 24. In assembling the unit the longitudinal bars 23 are first laid out in parallel spaced relation and the transverse bars are laid down thereon in, the proper angular relation to the longitudinal bars and; then moved downwardly until the slots in: terengage and the bars are welded together at their intersection.

As shown in Figs. 5, 6, '7 and 8; a perimetral frame 29 is provided for the unit, the samebeing formed of angle bar stock having-its horizontal flange 3E! lowermost and extending inwardly and engaging undercut notches 3! in the ends-0f the grid bars, the ends of which are welded to the perimetral frame. The lower surface of the perimetral frame 29 is in the same plane as the bottom edges of the longitudinal and transverse bars, thus maintaining a flat under surface for the unit, so that all of the bars and the perimetral frame bear on the floor, deck or undersupporting surface. The horizontal flange 30. of the frame bars 29 may be provided with spike or bolt. holes 32 by means of which the units may be teme porarily or permanently fixed to the load supporting surface. The top edges of the frame bars extend upwardly to. the level of. the, extensions.

The antislip deck sections. are madeof. proper. dimensions and of proper weight for ease ininstalling, removal and storage. Thus a convenient size has been found tobe eight feet long and one foot wide.

When in use as in the hulls of. vessels. or in '4 freight cars or trucks, the sections are laid side by side to cover the entire floor or deck extending from wall to wall or between suitable braces to prevent lateral and longitudinal movement of the units.

My improved antislip deck provides the teeth l4 symmetrically arranged in groups of four with their apexes in spaced relation and directed inwardly. Again the teeth I! are also arranged symmetrically in. groups. of'four but with their apexes directed outwardly. It is thus evident that the workmans shoe or the bottom of a piece of cargo or freight would upon the application: of. a shifting force at any horizontal angle be engaged inevitably by teeth and thus prevented from movement. Also the raised top edge ofthe perimetral frame prevents slipping of the workmen or cargo off the unit.

Where the antislip units are designed merely as a surface upon which the workmen stand and walk, the rectangular openings between intersecting bars" may be; approximately one and onehalf. inches square, as a substantially greater spacing between the groups of teeth would render Walking less comfortable. Again Where heavy machinery or other large and heavy elements of cargo or freight are to be mounted on units embodying my invention, the spacing between the groups of teeth may be of greater dimensions.

The outward anddownward slant of the edges l3 provide acute angles forming the teeth IT and in case of slippage the shoe of the workman or the edge of freight or cargo will be directed into contact with the tooth I! of the adjacent extension H.

I claim:

1. A grid comprising two sets of spaced parallel bars, a series of spaced projections on the upper edge of each bar, interlocking slots ineach space between said projections on one edge of one set of parallel bars, interengaging slots in corresponding positions on the opposite edgeof the other set ofparallel bars, both sets. of spaced parallel bars interlocked in intersecting crossed relation by the corresponding slots with the tops of the spaced projections forming a deck and with their ends grouped around the intersections, the ends of said projections being undercut to provide-sharp corners adjacent said intersections.

2. The structure of claim 1 characterized in that alternate of said spaces are arcuate and thetop surfaces of the projections slope upwardly toward said adjacent arcuate spaces.

3. The structure of claim 1 characterized in that the interlocking slots on one set of parallel bars are on the upper edge, and the interengaging slots on theother set of parallel bars are on the lower edge.

GEORGE. W. CAUSEY.

References Cited in. the file. of this patent UNITED. STATES PATENTS Number Name Date 1,180,953 Steckenreiter Apr. 25, 1916 1,570,384 McClure Jan. 19, 1926 2,317,174 Bunker Apr. 20, 1943 2,384,303 I-Ieath Sept. 4, 1945 2,509,732 Ernestus May 30, 1950