US1304056A - Bracket for stair-treads - Google Patents

Description

w. E. IRVING. BRACKET FOR STAIR TREADS.

APPLICATION FILEDJUNEZ-j.H418v Patented May 20, 1919.

2 SHEETS-SHEET I W E IRVING BRACKET FOR STAIR T'READS.

- APPLICATION. FILED was 25. 1918- 1,304,056.

Patented May 20, 1919.

2 SHEETS-SHEET 2- I I 'rwenlio l 5B9 hi0 @HIOZTIW UNITED STATES PATENT orricn.

WALTER EDWARD IRVING, OF GLENBBOOK, CONNECTICUT.

BRACKET FOR STAIR-TREADS.

Application filed June 25, 1918. Serial No. 241,761.

veniently supporting the ends of iron gratings such as are used for making stair treads in ships and other structures. Such stair treads have heretofore generally been made of ordinary rods, which have been inserted in holes in the staircase side members and upset or otherwise fastened therein, but now more highly organized forms of gratings are being used for such stair treads and the question of how best to support these small panels of grating structure from the side members of the staircase is a more diflicult one. I have invented a simple form of integral bracket which can be cheaply made without special tools, bent and punched cold, and which forms a most effective support and fastening means for the grating ends. The

best form of apparatus at present known tome embodying my invention is illustrated in the accompanying sheet of drawings in which- Figure 1 is a perspective view of the bracket and one end of a stair tread grating,

supported thereby, parts being broken away.

Fig. 2 is a vertical section on line 22 of Fig. 1, showing two of the brackets in position on a staircase side support. A

Fig. 3 is a detail cross section showing a modified formof bracket.

Fig. 4: is a view similar to Fig. 1, showing the modified construction'also illustrated in The bracket has end ears 5, 5, bent at right' angles to body 4:, and spaced to embrace the ends of the . outer members 1, 1, of the grat- Specification of Letters Patent. Patented May 20, 1919.

ing. Bracket ears and grating members have holes punched in them which register one with another so that the parts may be fastened together by rivets 6, 6. Lugs 7, 7, are formed on, the inner surface= of the bracket by stamping out and bending in tongues of the body metal, which @lugs or tongues come under the ends of certain of the inner straight supporting members 1, 1, of the grating. The holes 8, 8, left by bending out the material to form the lugs conduce to ease in cleaning the parts of the completed stairway and avoiding the collection of dirt in the corners between lugs, bracket bodies, and grating bars, the side member 3 of the staircase having registering open-' figs 12, 12, punched therein, as indicated in Preferably these lugs are punched out in grooved or curved form as shown so that the grooves or concavities so formed on their upper surfaces will embrace and engage the under edges .of bars 1, 1, thus insuring the continued centering of the member 1, on the lugs even under application of great weights wlliich might tend to bend the bars to one s1 e.

The rivet holes 6, 6, in end ears 5, 5, regis ter with the holes punched in bars or bearing members 1, to receive rivets 11, 11, which are employed to fasten the bent strips 2, 2, to the bearing members, so that no special punch work is required for this connection.

A modified form of grating supporting lug having many advantages shown in de-- tail in Fig. 3. The punch which forms the opening 8, and stamps out lug 17, is given a special construction so that said lug is grooved or slotted at its upper end, as shown at 10,.and is bent through an angle of only about 45 degrees so as to leave it standing in the inclined position shown in Fig. 3. The bearing members 1, of the grating are then seated in grooves or slots 10. This gives a positive, interlocking joint between grating sizes of grating panels, and these can be used in the making of any type of iron stairway or ladder.

Having described my invention, I claim: 1. As a new article of manufacture an inw tegral bracket for supporting stair tread gratings and the like, comprising a strip of metal perforated for reception of means to attach it to a proper support, having perforated cars at either end bent at right angles to the body of the bracket, and supporting lugs formed of tongues of metal stamped out of the body of the bracket and projecting from the same side thereof as do th above mentioned ears.

2. A structure such as set forth in claim 1 in which the lugs are grooved so as to present a concave upper bearing surface.

3. The combination with a grating having a series of horiaontally extending members, the outer ones being horizontally perforated near their ends, of a bracket for supporting said grating, comprising a strip of metal having at each end ears projecting at right angles to the bracket body, spaced to embrace the ends of the outer grating members,

and perforated to register with the perforations in said members, and also having lugs punched out of the bracket body and extending under and in contact with the ends of other horizontally extending members of the grating.

4. A combination such as set forth in claim 3 in Which the lugs are grooved to partly surround the grating members with which they engage.

5. Asv a new article of manufacture a bracket for supporting the end of a grating or similar structure which bracket comprises a strip of metal adapted to be fastened to a supporting structure and having a lug stamped out and projecting inwardly toward the grating in an inclined position, said lug having a relatively deep and narrow groove in its upper surface.

WVALTER EDWARD IRVING.

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