US1738829A

US1738829A - Floor plate

Info

Publication number: US1738829A
Application number: US224444A
Authority: US
Inventors: James E Jones
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-10-06
Filing date: 1927-10-06
Publication date: 1929-12-10
Anticipated expiration: 1946-12-10

Description

Dee., m M9.' .1. E. JONES f 1,738,829

v FLOOR PLATE Filed oct. 6.' 1927 20 2216 U9 `2022J6 zz 79 Jl Patented Dee. 1o, 1929-- UNITED STATES JAMES E. JONES, F CHCAGO, ILLINGIS rLoon PLATE Application led 0ctober'6,.1927. Serialy No. 224,411.4.

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lface which is regular in form and on which 'V the projections are relativelyb long and narrow, thereby engaging the soles of shoes as they pass over the plate, preventing slippage and at the same time affording a rm, regular surface which is not uncomfortable particularly to the vvearers of thin soled shoes.

Y Another and further object of my invention is the provision of a floor plate having projections formed. thereon and integrally therewith in such manner that the floor plate is easily cleaned and does not have a plurality ofinterrupted surfaces thereinwhich hold the dirt and refuse, and prevent its ready removal from the plate. 4

-Another and further'object of my invention is the provision of a floor plate which, 'be- 3@ cause of the arrangement of the projections on the' treadV surface thereof, is uniform in cross sectional strength throughout any given area in its length,thereby enabling the plate tobe rolled to accurate dimensions Without the necessity of trimming the ,edges and also providing a plate having maximum strength with a minimum' quantity of metal placed therein, thus resulting .both in the saving of labor in the manufacture of the plateand the io saving of material.

Another and further object of my invention is a floor plate having a series of projections thereon which are uniform in size and cross-sectional area, and uniformly spaced With-relation with each other, and so arranged that there is no weakening of the plate bythe displacement of metal to form' the projections, vand each projection is so formed during operation of the plate that there is 'a minimum These and other objects of the last pass in the rolling displacement of the metal to form the projections. a

my invention Will be more fully and Vbetter understood by reference to the accompanyingsheet of draw- 55 K ings and in which Figure 1 is a fragmentary elevational view of the tread surface of my improved plate; Figure 2-is a side elevational vievv ,of the plate shown in Figure l; and j Figure 3 is an end elevational -vievv of the plate illustrated in Figure l. l

Referring now specifically to the drawings, a floor plate is shown having a flat under surface 10 and having an upper surface 11 65 upon which is formed a plurality of projections designated as a Whole as 12, 12, these projections being arranged in rows longitudinally of the plate and also transversely of the plate, With the projections in each row ar- 7o ranged in staggered relationvvvith the projections in each adjacent roW, each of these projections l2 being uniform in dimension and in cross-sectional area. Each of the projections is frusto-conical in cross section and in theform as shown, is approximately one- `tenth of an inch in height and has a base portion 13 which is approximately of an inch in Width, and sloping

side portions

14 and 15 respectively, With a flat upper tread sur- 80 face 16 which isapproximately 2; of an inch in Width, thereby presenting at the juncture of the

surfaces

14 and 16 an edge 17 With a similar edge 18 being provided at the op- -pos'ite side of the projection V12 at the junce5 ture of the

surfaces

15 and 16, these edges 17 and 18'forming the sole engaging portions of the projections and which prevent slippage of the foot as the shoe is brought into contact with the tread surfaceof the plate as the plate is Walked upon in a transverse direction. The projections 12 have their longitudinal axes parallel with the longitudinal axis of the plate, and in dimension from the center ofone projection to the center of the Aadjacent projection in a longitudinal direction is approximately 2% inches. Each of the projections have sloping

end surfaces

19 and 20 with edges 21 and 22'being formed atfthe-junction of the

surfaces

19 and 16 and 100 20 and 16 respectively, thereby forming edges adapted to engage the shoe of the wearer when Walking in a direction longitudinally of the plate. f

It will be noted that the

edges

21 and 22 respectively. are in substantial alignment with each other, there being a very slight overlap of these edges in the projections to slightly compensate for the small quantity of metal which is moved out of the body of the plate to forni each of the projections'.- A transverse line of fracture'in the plate would run in a zig-zag direction around the ends of the ribs because the plate is stronger through the ribs than through the body of the plate. It will also be noted that there are no diagonally extending regularly formedv channels in the plate whereby there may be formed in the plate a line of fracture extending in these dirctions thereby weakening the pla-te and rendering it liable to crack along these lines in service.

The projections measure from the base in a I longitudinal direction or lapproximately 15/8 inches in length and from the center line of one row of projections in a longitudinal direction to the center line of the projections on each side, approximately 3% ,of an inch, the projections being so arranged that the tread surface forms a smooth supporting surface for the shoe as it is brought in contact with .the surface and yet affords sufficient friction between the edges of the various projections on the tread surface of the plate and the shoe to prevent slipping of the shoe on the tread surface of the plate.

It will be noted from the foregoing description that the arrangement of the projections upon the tread surface by reason of their staggered relation with each other and the slight overlapping of the projections at their ends, affords a plate which is uniform in strength along cross-sectional lines and therefore the plate may be rolled to very exacting dimensions witliout the additional trimming operations usually employed to bring plates of this character to proper size.

While I have described more or less pre; cisely the details of construction7 I do not wish to be understood as limiting myself thereto, as I contemplate changes in form and of Sept., 1927.

. JAMES E. JONES.

the proportion of parts and the substitution of equivalents as circumstances may suggest or render expedient without departing from the spirit or scope of my invention.

"I claim: i A floor vplate comprising a. rolled metal section having a Hat under surface and an upper tread surface having a, plurality of rows of elongated rectan arat topped projections thereon, the sai projections being 1n staggered relation in adjacent rows and having slopin sides making angles with the flat tops and orming non-slip ing edges atthe line of juncture between sal sloping sides