US2288234A - Metal table top - Google Patents

Description

T. H. FAY

METAL TABLE TOP June 30,1942. I 2,288,234.

Filed Dec. 12, 1959 '2 Sheets-Sheet l /6 l A5 t I III II II II [I II II [I H II II II II II II H H H II H H H H [I ll H II H l l -ll II II II ll [14 II II H II II II II [I II H II II H [I II H [I H H ll H H 1| 1| H II II H II II ll II [I II II II H II H [I H H [I ll H II [L H H II II ll ll II II II II II II II [I II H II II I] [I II H H II H II I H H II J II II II II II I] II II II II H H II II I II II [I I H II ll A5 Fig. 5

INVENTOR. THOMASfiFQY ATTORNEYS.

June 30, 1942. T. H. FAY

METAL TABLE TOP 2 Sheets-Sheet 2 Filed Dec. 12, 1939 Fig.

Fig.5

INVENTQR. 'THoMAs Hfiav j BY l KNOW??? Patented June 1942 Y UNITED us'rar. new 'ror Thomas II. Far, Wllloughby, Ohio, assignor to Gridiron Steel Co corporation of Ohio Cleveland, Ohio, a

Application December 12,1939, Serial No. seam Claiml. (else-1st) The present invention relates to metal table.

tops and more particularly to a top particularly adaptable for ironing tables where great longitudinal strength is required as compared with the necessary transverse strength.

In the present construction, I have employed two relatively thin sheets of metal, the thickness thereof being such as to keep the weight of the completed top to approximately that of a wooden top such as is now commonly employed. The present form consists of a corrugated under sheet and a plain top sheet, the corrugated sheet having dents or depressions in the upper face of the corrugations, preferably spaced at regular intervals. 'lhe two sheets are then united by welding, riveting or the like at the points in contact to provide a stiff box-like structure with strengthening porrtions therebetween and with portions in contact thus forming supports for the top'sheet.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means-hereinafter fully described and particularly pointed. out in the claims; the annexed drawings and the following description settin forth in detail certain structure embodying the invention, such disclosed means constituting, however, but one of various structural forms in which the principle of the invention may be used.

In said annexed drawings-' Fig. 1 is a side elevational view of an table embodying the invention;

ironins Figs. 2 and 3 are a top and bottom plan of the table top respectively;

Fig. 4 is a cross section through the top;

Figs. 5 and 6 are cross sectional views at right angles to Fig. 4 and showing two methods of securing the sheets together; and

Fig. '7 isa section on the line 1-1 of Fig. 6.

The present table top consists of a top sheet I: pressed or formed to shape and preferably having a slightly curved or convex'upper surface with a depending flange l l around its entire periphery. The bottom sheet if is formed of a corrugated sheet of metal with the corrugations running lengthwise of the sheet, the upwardly extending ribs ll of which are adapted to be in contact with the lmder side of the top sheet If.

.To obtain a spacing of the sheets to form them into a box-like structure when secured together,

the ribs it are provided with spaced indented or downwardl bent portions, II, such depressed portions being preferably staggered in adjacent ribs ll (seeliig. 3) so as to leave full portions It in contact with the top sheet at regularly spaced intervals over the entire top.

The bottom relatively horizontal portions 11 of-the corrugated sheet are thus held in spaced relation to the top, and form a series of longitudinal ribs or channels which give great longitudinal strength and stiffness to the completed board; As the two sheets are spaced apart between the contact areas I! there is sumcient transverse stiffness, particularly as these contact areas It are staggered.

r This lower sheet If fits snugly within the top sheet and has'a peripheral downwardly extending flange 2 nesting. snugly against the flange of the top sheet. These two flanges are rolled together and underneath the board to provide a stiflening tubular flange 22 around the edge of the board. I

To secure the sheets rigidly together they'are either welded at the contact areas It, as best illustrated in theenlarged section of Fig. 5, or

they may be riveted together, as best shown in Fig. 6. In this form, the top sheet is provided .with spaced openings 2| in the center of small circular depressions 20. The bottom sheet is similarly provided with apertures 21 registering with the opening. 2! in the top sheet. Rivets 28 are used, the heads I! filling the circular depres-- 'sion to form a smooth upper board surface, the shank being preferably hollow and being forced outwardly to clamp the bottom sheet rigidly in position. In the production of a board such as shown, itisonlynecessarytouseablanking andforming die to trim and form the top sheet witha slightly convex surface and a depending flange of the required depth. The bottom sheet is,

similarly formed from a -standard corrugatedsheet or the corrugations may be formed in the die, if desired. The flanges are then rolled to-v Q gether and the two sheets welded or riveted, as desired. The longitudinal strength of the finished product is largely determined by the total depth of the corrugations, the depth of the depressed portions determlning the lateral or transverse stiffness and giving the initial longitudinal strength.

It has been found that two sheets of steel of such' thinness as approximately equal a three quarter inch wooden board in weight can be made into a table top of. strength equal to that of wood with less deflection under normal loads. These can be made economically when produced in quantity, the cost approaching that of the best wooden boards.

Other modes of. ap yin the principle of my my invention may be. employed instead of the one .wardly extending corrugations formed with spaced depressed portions leaving spaced portions contacting said top sheet, said two sheets being rigidly united at such contacting portions and having the flanges rolled together to form a tubular reinforcing flange around the outer edge of the top.

2. A metal ironing table top, of the usual contour, consisting of a convex top sheet, and a corrugated bottom sheet, having the corrugations extending longitudinally of the top, said cormgated sheet having portions depressed downwardly from-the'upper horizontal portions of the corrugations and having the undepressed portions of such corrugations rigidly secured to said top sheet, said two sheets having their peripheral edges secured together in a bead and presenting a closed, smooth edge for the top.

3. A metal ironing table top, of the usual contour, consisting of a convex top sheet, and a corrugated bottom sheet, having the corrugations extending longitudinally of the top, said corrugated sheet having portions depressed downwardly from the upper horizontal portions of the corrugations and spaced from said top sheet and having the undepressed portions of such corrugations rigidly secured to said top sheet, said top sheet having a downwardly depending peripheral flange formed'into a closed hollow bead to cover the edges and to reinforce the top.

4. A metal ironing table top, of the usual contour, consisting of a convex top sheet, and a corrugated bottom sheet, having the corrugations extending longitudinally of the top, said corrugated sheet having portions depressed downwardly from the upper horizontal portions of the corrugations and having the undepressed 5. A metal table top consisting of a plain top sheet having a peripheral depending flange and having its surface slightly convex in contour, a bottom sheet corrugated longitudinally of the table top and having a complementary downwardly depending flange, said bottom sheet having the relatively horizontal portions of its upwardly extending corrugations formed with spaced depressed portions leaving spaced portions contacting said top sheet, said spaced portions in each corrugation being staggered relative to the depressed portions in the next adjacent corrugation and said two sheets being rigidly united at such contacting portions and'having the flanges rolled together to form a tubular reinforcing flange around the outer edge of the top.

THOMAS H. FAY.

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