US1620846A - Grating - Google Patents

Description

March 15,1927; 1,620,846

. A. E. WELLS GRAT I NG Filed Oct. 31. 1921 Inventor.

fw waw Patented Mar. 15, 1927.

ARTHUR H. WELLS, OI TORONTO, ONTARIO, CANADA.

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Appllcatlon fled October 81, 1921. I Serial No. 511,780.

The principal objects of this invention are to provide a grating for covering open spaces in which the bars are very r1g1dly connected together, thus rendering it very safe for traflic thereon, and to devise a construction which will be extremely strong and which by reason of its extreme simpllcity ma be manufactured at very low cost.

X further object is to devise a grating presentin a surface which will minimize the possibility of sli ping.

The principa feature of the inventlon consists in the arrangement of notched transverse bars in which the parallel longitudinal bars are secured by deforming the metal of the bars after they have been placed totogether.

In the drawings, Figure 1 is a perspective view of a portion of a ating constructed in accordance with this lnvention.

Figure 2 is an underside plan view Figure 3 is a section through the line 3-3 of Figure 2.

Figure 4 is an enlarged sectional detail through the apex of a portion of one of the V barsshowing the interlocking of the memlfiers effected by the dual deformation of the ars.

Steel gratings are being utilized to a rapidly increasing extent for covering open areas in pavements and it is necessary to provide a very strong and durable structure to withstand the trafiic.

In the construction herein shown the cross bars 1 which are preferably the shorter bars of the grating, are formed of a substantially V-shaped section being made of angle steel having the flanges bent inwardly. These bars are formed withvnotches 2 cut in the an 1e being preferably punched transversely.

ongitudinal bars 3 are laid in the notches v 2 which are slightly deeper than the depth of the bars 3. The composite structure is then subjected to the action of a press, suitable punches being'arranged to enga e the underside of the bars 3 between the anges of the cross bars 1 to deform the metal of the longitudinal bars, spreading the metal Simultaneous with this punching, operation 1t is desirable to slightly deform the metal of the cross bars on the upper side. This 1s done by suitable projections on the bed late of the press which form the notches 5 1n the top edge of the cross bars 1, pressing the meta at the notches slightly overthe longitudinalbars and effecting a downward displacement of the, upper portions of the side walls relative to the bars 3 with the result that a jamming action is produced be' tween the outwardly displaced portion of the longitudinal bars 3 and the walls vof the notches 2, the intermediate portion of the apex between the downwardly displaced side wall portion being supported from below during such displacement.

As is shown in the drawings, it is not necessary to deform the longitudinal bars andthe cross bars. atevery intersection,'the drawing showing them. deformed at alternatin intersections.

ratings thus constructed may be put together in a very rapid manner, gang punches eing used to cover a large area with one operation of the press. -No riveting, drilling or fitting of bolts or other fasteners are required and the structure when completed is extremely rigid and strong.

The longitudinal bars are. spaced apart whatever distance desired but even though very closel arranged they present an excellent= non-s 'pping surface and the angle edges of the cross bars which preferably project slightly above the longitudinal bars,

present a very excellent obstruction to longitudinal slip ing. Y

What I c aim as m invention is l. A (plurality of orizontall arranged V-shape angle bars (1) paral elly spaced and disposed with their apexes upward "and each having a plurality of notches (2), with horizontal bottoms formed in the apex, a plurality of horizontally arranged cross bars (3) inserted in said notches and havin flat bottom surfaces resting flatly on the orizontal bottoms of said notches, the up er.

surfaces of the latter bars being arrange in a common plane slightly below the u permost edges of said V bars (1), said fatter bars 3 being deformed laterally at (4) to engage the underside of the metal forming the apexes of the V bars.

2. A plurality of horizontally arranged V-shaped bars parallelly spaced and disposed with their apexes upward and each having a plurality of notches withhorizontal botter bars being deformed laterally and forced 10 vtoms formed in the apex, a plurality of horiapwa-rdly on either side of the notches in the -zontally arranged cross bars of rectangular bars to solidly en age the underside of cross section inserted in said notches and the apexes of said V are, and said V bars having their fiat bottom surfaces resting flatbeing deformed laterally at the sides of said ly on the horizontal bottoms of said notches, note the upper surfaces of the latter bars being intimate contact with the deformed under arranged in a common plane slightly below portions and the side walls of the cross bars.

the uppermost edges of said V bars, said lat- ARTHUR E. WELLS.

es to press the metal of the V bars into 1 I

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