US851862A - Fire-escape. - Google Patents

Description

No. 851,862. PATENTBD APR. 3o, 1907.

- F. J. BRMBTT.l

FIRE ESCAPE.

APPLICATION FILED )3130.111906- ATTORNEY FREDERIC J. BRYANT, OF NEW YORK, N. Y.

FIRE-ESCAPE.

Specification of Letters Patent.

Patented April 30, 1907.

Application iiled December 17,1906. Serial No. 348,263.

Be it known that I, FREDERIC J. BRYANT, residing at the city of New York, county and State of New York, have invented certain new and useful Improvements in, Fire-Escapes, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in the construction of fire-escapes and particularly to ladders, commonly called chain ladders, used as a means of escape from a burning building.

One feature of my invention resides in the manner in which the suspensory member or chain is interlocked with the rung of the lad der; and an obj ect of my invention is to provide a iire escape which will be simple in construction and perfectly safe in operation.

In the drawings illustrating the principle of my invention and the best mode now known to me of applying that principle, Fig ure 1 is a front elevation of my new iire ladder Fig. 2 shows in end view one of the rungs 5 Fig. 3 is a sectional detail on line A-A, of Fig. 1,' and Fig. 4 shows in sectional detail a modiiied form.

The rung a is tubular and is slotted longitudinally at each end. A link c of the chain d is slipped into the slot e in the end o i the rung a, which then rests upon the enlargement or knot f formed in the wire. To lock the link securely in place, a common washer or annular disk g is slipped over the end of the rung and the end of the rung is then upset so as to form a shoulder or 'ilange t, which holds the Washer securely in place.

In the form shown in Fig. 4, the end ot' the rung is of a smaller or reduced diameter than is the body portion ol" the rung; and when the end of the rung is upset, the washer g is locked in the groove fi.

My new ladder is very light, easily folded into small space and veryV strong, all of which `features are sought after in this class ol apparatus.

I am aware of the patent granted to O. Mace on December 2G, 1899, No. 639,902; but the permanencjvY ol the position of the rungs in the structure shown and described in that patent depends upon the tightness with which the nuts are made to am the wire cable against the walls of the aperture through which the cable passes and the permanenev of the position ol the nuts themselves after they have been adjusted. In my new ladder the rung a cannot sip along the suspensory member since it is supported by the knot f; and the suspensory member is not subee'ted to any deformation or weakening, when the washer g is secured in place.

I claim:

1. In a ladder, the combination oi a rung formed with a slot and with an integral ilange at its end a suspensoniv member which passes through said slot, and a washer interposed between said V[lange and said suspensorj.' member.

2. In a ladder, the combimit-ion oi a rung formed with a slot and with an integral l'lange at its end; a suspensor;Y member which passes through said slot; and a washer slidably mounted on the end of said rung between said [lange and suspensoniY member.

FREDERIC J. BRYANT.

Titnessesz JAMES HAMILTON, MARGARET HAMILTON.

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