US1578491A - Stair tread - Google Patents

Description

March 30 1926.

H. A. WELCOME STAIR TREAD Filed March 6. 1924 7 4" INVENTOR.

ATT-ORNEY.

Patented Mar. 30, 1926.

f, more];fs mr HAROLD AQ ELQO'ME, or :LOWELIJ, asse ses To sa es an Mason SAFETY BREAD COMPANY, or LOWELL, MAssAoHUsETTs; aconsona rioni V swam ,TBEAD.

a iicatio'nfil ed. Mamie,

To all whom it may concern 3 Be it known that L l-Lilian A. lVnLooMn, a citizen of the Unitedxstates, residing at Lowell, inothe county of Middlesex and State of Massachusetts, have invented oert p tain new and useful Improvements in Stair Treads; of which the fication. 1 This invention. relates; to safety treads-on I non-slipping treads such as are desirable for use on stair-ways, bus andcar steps and other places where there is danger of persons slip-- ping andwhere there is excessivewear.

My purpose. is to provide a cheap, tough tread which can be readily transported and attached without being injured, and which 1 has a flat top surface the-whole face .of

which is of non-s1ipping nateria1, and which has afront edge or nosingwlnch is tough and durable and OfWlllCll a substantial part is composed of non-slipping material so that it will not break, will wear'a. longtime and will also prevent slipping}- r I Broadly speaking my invention includes a sheet metal base plate covered with an in-v tegral sheetof non-slipping material which,

is locked to the'base plate and whichextends right out to the front edge, or gwhat' will-be the front edge when in use. p i With my construction, the front edge of the base plate can be bent down so as to con- I form to any siZe orshape of the support, such as a stair tread or a platform of any kind on whichit rests. I am aware thattreads formed'jof' metal with parallel channels filled with lead as shown in patent to Mason, No. 18M702, Beevers, No. 800,895, and Farmer, 838,247, have been used and in the latter, locking tongues have been used. 7

I am also aware that a tread including a tough metal base with locking lips to hold a lead surface which extends over the nosing is shown in patent to Messick No. 1,094,859. In association with a sheet metal base having locking members which hold inpla'c'e a non-slipping composition which extends with a smoothtop over the whole of the base, I claim to be the first 'to use a plurality of similar integral spaced front lugs which extend u wardly and backwardly from a downwarc ly bent edging or nosing, the spaces between the lugs being'filled with theant-hslipping composition. Fig. 1 is a section on line i--=1 of Fig. 2

following is aspeci- I I I Fig.5 isa sectional perspective showing a}; complete'stair tread inplace with the", riser Y and regular tread. j a I punched upward from the plate 192-4.. Serial no. 697.357.

showing the base plate beforeit isfilledwith composition. F i'g. 2 is a. plan view ofFig. :Fig. 3 1s a SGOUOH" on line3'3 showing thebase plate filled with composi- Fig. tis a bottom view Fig. 6 is-a perspective of a modified form of stair trea'd in which the back edge is not Fig. 7 is a detail in perspective showing of Fig. 4;

a basewith no lags-nor expanded metal, and i at the front, s'pacedangular lugs riveted to the base instead of being'integra'l therewith.

Fig. 8 is aperspective view showing ,a form 'oftread' which is convenient for shipping and serves thed'esired purpose in most cases.

Fig. 9 is a sectional perspective ofa' modified type of front lugs.

In the drawings, A represents a plate of sheet metal having an upwardly bent back edge l t and a plurality of locking lugs 10 I and 11, pressed ,npwardly from the main fflat portion 9 of the base leaving hole ,7, 7, f V and 13, represents a downwardly bent front edge upwardly and baokwardly from which extend the integral spaced front lugs 12,12,

A leaving holes 8, 8. j v j p B represents the anti-slipping composi: tion which is preferably applied to the plate in a plastic condition and troweled or pressed down so as to fill the holes 7, 7, from which the lugs 10, 11 have been pressed, and covering the locking lugs 10 and 11 extend-' inginto holes 8, 8, and preferably flush-or a little over the top faces of the front lugs 12, '12 and at 15, 15, between and flush with, v

or slightly in advance of the frontand topfaces thereof; I

In Fig. 5, F represents the riser and G the .wooden' tread having a front edge 18, which .fits the bent down front edge 13 of plate A.

The back edge 1 1 may be at-rightangles and fit sniwly against the next rider H or there may be a space between, as shown at 76 in Fig. 8. p

In Fig. 6, I show a plate L without lock ing lugs and with no bent up back ed e but with the bent down from edge 45, and the f-Qor 52, but which donotshow, attached to a -j wood'entread G of larger sizev leaving "a V "and frontdlugs inclosethe composition 1? 42. This metal M seryes to lockthe anti- 5 slipping composition in place.

In Fig. 7, the base 0 has its front edge bent down at 61 but :its b2 ck sc'dge is not bent up and there is noloelging means for" I spaced integral legs or teeth bent up iroi'n 1 theanti-slipping composition; 7 I

I Insteadof integral front lugs I showthe spaced upwardly bentfrent lugs 52wlnel'1 to" the base plate f V In Fig. 8, I show an a-11t-islippin trend which 'p-refe1'eb1yhas frontlugs like 12,43

' areattached by rivets- 53,01 spot welding 5 v spaee' TS at the back and a space Wat eaeh end; I

1 In this oaseg'thebase R hasa bottom plate from which aback edge 'il' is bent up and ateaeh end, a side edgesuch as 72 bent 7 up. The back edge 71 side edges" 72, 72,

and protect its edgeswhen the tread is being shipped and alsowhen it is in use on a.

largerwooden tread." V

' For looking members, I show expanded 111613211 73, the meshes of which are spot-.ve]d'- ed as at 7 5, 75 to bottom or base plate 70.

i While a sheetmetal base 'i's'desirable, it is .inlii g- 9- 7 lvly preteii'redtype of tread is made of clear that any kind of 111etalbasei1'my, be

'used. v i I r i v It is also clear that the downwardly bent front edge such' as 13 or 61'- naybeoinitted and teeth such as 81, 81, may be ciltand bent up at 1-ightangles from base-- as' show'n sheet metal bentupiat the back and'sidcs to form a pan,,andQhavingoat the front the bottom suchf pan being:filledwith a nonslipping a-rtificial'stonecompound which is,

locked-to the bottom of the pan, either by lugs bent up therefrom, or other suitable -Preferably these lugs are bent over backf so that the material extends and is thereby held.- in place." 9,1 elain1fi= In astair tread the combination of a sheet under Y thein metal base having locking members, and a front edge from which integral spaced front legs extend upwardly; with a non-slipping composition which covers the locking mem; hers and extends with a- S11100thtUP OV6I the whole of the base and between thGffIOi'lt and top faces of the frontlngs.

HAROLD A. ELooME.

Images