US396852A - Fire-escape - Google Patents

Description

(No Model.) 3 Sheets-Sheet l J. G. BERDROW & P. A. PELKEYQ F'IRE ESCAPE.

No. 396,852. Patented Jan. 29, 1889.

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(No Model.) 3 Sheets-Sheet 12.

J. G. BERDROW & P. A. PELKEY. FIRE ESCAPE.

No. 396,852. Patented Jan. 29, 1889.

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FFTCEQ JAMES G. BERTHHHV AND FRANK A. PELKEY, OF SEXVARD, NEBRASKA.

FIRE-ESCAPE.

SPECIFICATION forming part of Letters Patent No. 396,852, dated January 29, 1889.

invented a new and useful Improvement in Fire-Escapes, of which the following is a full, clear, and exact descri1 )tion.

The object of this invention isto provide an improved lire-escape by which the descent of persons from a building in case of fire maybe effected quickly, safely, and conveniently, and which will possess the merits of simplicity, compactness, and cheapness to a marked degree.

The invention comprises certain novel features of construction and combinations of parts and in order that the invention may be fully understood the mode in which it may be carried into effect will first be described in detail, and its various features then distinctly pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate correspondin parts in all the figures.

Figure 1 is a perspective view illustrating the application of a fire-escape embodying our invention. Fig. 2 is an enlarged front elevation of the said fireescape, and Fig. 3 is a sectional side elevation of the same on the line 00 a; of Fig. 2.

The frame A of the improved fire-escape thus illustrated is adapted to be rigidly secured to the outside of the door or window casing of a building, as shown in Fig. 1, and is provided with forward-projecting bearings C, in which is mounted to turn a transverse shaft, D, having fixed thereto a pair of grooved wimling-drums, E F.

Hoisting-cables E F, carrying on their lower ends hooks for attachment of the cages or cars E which hold the persons making the descent, are wound in opposite directions on the respective drums E F, so that when one car descends the other cable will be automatically wound up for use by the next person, and so on indefinitely. On the winding-shaft D is also fixed a cog-wheel, G, which gears with a pinion, H, fixed on a transverse shaft, I, which is also mounted to turn in hearings on the frame A, and carries a cog-wheel, J,

Serial No. 280,956. (No model.)

which is geared with. a pinion, K, fixed on another transverse shaft, K, mounted in bearings on the frame A. The shaft K carries also a large bevelgear, K which engages with a bevel-pinion, L,fixed on the lower end of a "ertical shaft, L, which is mounted to turn in bearings on the frame A. This arrangenu-mt of multiplying gearing is to cause the vertical shaft L to revolve rapidly while the windingsha'ft is undergoing a comparatively slow rotation.

On the upper end of the vertical shaft L is fixed a peri pherallygrooved brake-wheel, M, with the groove of which a brake-sh0e, M, fixed on the upward-prejecting arm N of an angle brake-lever, N, is adapted to engage, so as to firmly grip and check the brake-wheel, and thus, through the connecting-gearing de' scribed, the winding-shaft I) when pressed against the brake-wheel.

The brake-lever N is pivoted at its anglci'o the frame .A, and has a lateral curved arm, N against the top of which a spring, N is arranged to bear, so as to hold the brake-shoe M normally away from the brake-wheel M. The inturned end of the arm N of the brakelever forms a cam, 0, below which a lever, O, is pivoted to the frame Ain such a manner as to, when swung upward, engage the cam O and throw the brakeshoe M against the brake-wheel.

The free end of the leverOis forked to embrace loosely an annularly-grooved sleeve, P, which is mounted both to slide lengthwise and to turn freely on the vertical shaftL, and di' rectly beneath which oppos .e pairs of ears P are formed on or rigidly attached to the shaft L, between which ears are pivoted the ends of opposite weighted governor-arms Q, having cams Q on. their upper edges to engage the bottom of the sleeve P.

The construction and arrangement are such that whenv the winding-shaft D is caused to revolve in either direction by the weight of a person descending by one of the two cables E F an excessive speed will cause the weighted arms Q of the governor in revolving to swing upward, so that their cams Q will elevate the sleeve P, and thus through the lever 0' apply the brake and check the rotation of the winding-gear. The descent of the car Will thus be maintained at a uniform rate Whatever be the Weight of the person descending thereby. A hand-brake rope or cable, R, is also attached to the outer arm of thebrakelever N, is passed loosely through a stationary guide, R, thereabove, and is permitted to hang downward, so that it can be grasped and drawn upon by the person about to descend by the car, and the latter thus held in place until he is ready to descend or checked at any point of the descent.

Brackets S T are fixed to the frame A be t low the respective Winding-drums E F, and

are provided with guides S T, through which ernor-shaft,weighted swinging governorarms, a pivotal lever in operative connection with 2 5 the governor-arms, a brake-Wheel connected to the Winding-gear, and a pivotal brake-lever having a brake-shoe and a cam engaged by the pivotal lever operated by the governorarnis, substantially as described.

2. The combination of a supporting-frame, a Winding-drum, a descending-cable, abrake- Wheel in connection With the Winding-drum, a brake-lever pivoted to the frame and having a curved ca1narm, a cam-lever engaging the cam-arm, speed mechanism by which the said cam-lever is controlled, and a hanging hand rope or cable, also attached to the said camarm of the brake and guided on the frame, substantially as described.

JAMES G. BERDROVV. FRANK A. PELKEY.

\Vitn esses:

EDMUND McINTYRE, JOEL TISI-IEN.

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