US449518A - Fire-escape or chain ladder - Google Patents

Description

(No Model.)

N. BUTTERIEIELD. FIRE ESCAPEr 0R CHAIN LADDER.

Patented Mar. 31, 1891.

UNITED STATES PATENT OFFICE.

NATHANIEL BUTTERFIELD, OF MONROE, IVISOONSIN.

'FIRE-ESCAPE OR CHAI N LADDER.

SPECFICATION forming part of Letters Patent No. 449,518, dated March 31, 1891. Application iiled November 20, 1890. Serial No. 372,095- (No model.)

To @ZZ whom t may concern.-

Be it known that I, NATHANIEL BUTTER- FIELD, a citizen of the United States, residing at Monroe, in the county of Green and State of Visconsin, have invented a new and useful Fire-Escape, of which the following is a specification.

This invention relates to improvements in fire-escapes.

The object of the present invention is to simplify and improve the construction of chain ladders for tire-escapes and other purposes and provide convenient means for attaching the upper end of the ladder to a window-sill or the like.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claim hereto appended.

In the drawings, Figure l is a front elevation showing the ladder applied in operative position to a window-sill. Fig. 2 is a detail portion of the chain ladder. Fig. 3 is a detail perspective view of the means for securing the ladder to a window-sill. Fig. 4 is a detail section on line .fr oc of Fig. l.

Referring` to the accompanying drawings, l designates a chain ladder composed of the `chains 2, having links 3, provided with a pair of loops 4, arranged in planes at right angles to each other, and flat rounds 5, constructed of flat metal and provided at their ends with perforations which receive the links at the narrow portions or necks 7 between the loops of the links, whereby the rounds are securely held at the desired point along the chains. The lower end of the chain is attached to a 14, adapted for the reception of the rod, and

at the other end with a set-screw l5, arranged to engage the lower face of the sill. The rod 12 is rigidly secured in the eyes la of the clips, and the clips are arranged at the ends of the rod and at a point intermediate of its ends.

It will be seen thatthe chain ladder is simple and inexpensive in construction, and the rounds are secured at the desired points without liability of accidentally slipping, and that simple and inexpensive means are provided for securing the ladder to a window-sill. or the like.

That I claim is-a The combination, with a chain ladder, of the rod l2, passing through the links, and the approximately U-shaped clips arranged at intervals on the rod and provided at one end with eyes to receive the rod and provided at the other end with set-screws adapted to engage a window-sill or the like, substantially as described.

In testimony that I claim the foregoing as my own I have hereto aiiiXed my signature in presence of two witnesses.

NATHANIEL BUT'lERFIELD.

Witnesses:

W. F. TEUKENEROD, ED. E. ELEY.

Images