US300308A - crandall - Google Patents

Description

(No Model.) 3 SheetsSheet 11 I J. A. GRANDALL.

FIRE ESCAPE.

No. 800,308. Patented June 10, 1884.

WITJVESSE (No Model) 3 Sheets-Sheet 2.

J. A. ORANDAL'L.

FIRE ESCAPE.

No. 300,368. Patented June 10. 1884.

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3 Sheets-Sheet 3.

(No Model.)

J. A.'0RANDALL.

FIRE ESCAPE.

No. 800,308. Patented June 10, 1884.

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UNITED STATES PATENT Urricn.

JESSE A. ORANDALL, OF BROOKLYN, NEYV YORK, ASSIGNOR TO HIMSELF, JOHN XVOOD, AND XVM. H. FLANDROWV, ALL OF SAME PLACE.

FIRE-ESCAPE.

SPECIFICATION forming part of Letters Patent No. 300,308, dated June 10, 1884.

Application filed February 7, 188-1. (N0 model.)

10 all whmn it may concern.-

Be it known that I, JESSE A. CRANDALL, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Fire-Escapes; and I do hereby declare that the following is a full, clear, and exact description of the invention, reference being had to the accompanying drawings, and to the letters of refereneemarked thereomwhich form part of this specification, in which- Figure 1. is a side elevation of the fire-escape, showing the same raised. Fig. 2 is a similar view with the ladder in a folded position. Fig. 3 is a plan view showing the bridge extended. Fig. 4 is an end elevation showing the ladder raised.

The object of my invention is to apply an extensible fire-escape mounted on a wheelcarriage, with means whereby one person may easily and rapidly reach a window in the upper portion of a building; and the nature of my invention consists in certain novel devices, hereinafter explained, by means of which I accomplish the above-named results.

Before describing my invention I will state that it is well known that extension-levers or lazy-tongs have been used, and also extension-levers applied to carriages have also been used, in fire-escapes. These devices I broadly disclaim.

I will now describe my invention, reference being had to the annexed drawings.

A A designate two horizontal reaches, the front transverse bar of which is provided with a king-bolt, A. to the front ends of the reaches, and it afiords the pivotal connection of the said front trans verse bar with the axle A of the front wheels),

The rear ends of the reaches A A are rigidly connected to the rear elevated portion, B, of

the axle B of the rear wheels. This constitutes the carriage-support of my improved fire-escape. The rear axle is rigidly braced by bars 13 B to the reaches, and the reaches are rigidly connected by transverse bars 0 0, near the rear axle, and also by a transverse bearing-bar, 0,loeated in front of and below the said bars 0 O, and rigidly secured to the reaches. 011 top of each one of the reaches I This bar is rigidly connected,"

rigidly secure eye-brackets or cars a a, a (1?, and in front of the eye brackets a", I secure to the reaches the standards D D of a drivers seat,D. The brackets or cars, above described, on the reaches afford bearings for two line bars or pintles, E E. Between the ears ac, on each one of the reaches, is received on a line bar or pintle, E, a strap, 2), which is pivoted to the rear end of a lever or arm, F. This arm is pivoted at f toanother arm, F, the front end of which is pivoted 'to an eye-piece, g, adapted to slide back and forward on the bars or pintles E. Now, it will be observed that I have one lever, F, on each side of the carriage, atits rear end, which is pivoted to a pintlestrap, b, connected by a fulcrum-pin at f, and that I have another lever which is pivoted at its front end to a slide, 5/. It will also be observed that the extremities of these levers are verse bars 0, and on these screw-shafts are.

keyed pinion spur-wheels 71. 71 which engage with a large spur-wheel, It, on a shaft, 7f, hav- "ing a perimeter-spur, h, on its lower end,

which engages with a worm, h on a handwheel shaft, h.

At the upper termini of the levers or arms of the extension-levers above described are pivoted ears and i i, to which are connected rods J J These rods are pintlcs, and they are joined by ears 3' to a platform or cab, K, which may be braced and strapped, as shown in the annexed drawings. The floor It of this platform or cab K has an opening or hatch- 5 way through its floor which is provided with a cover, 7c, and from the base of the floor at k is hung a flexible ladder, L, which bears against and is guided by the intermediate transverse rods, G, of the extension-levers,

IOO

and it therefore not only steadies the ladder, 1 It is obvious that the natural elasticity or but aflords many hand-holds for persons ascending or descending the inside of the extensible frame. The lower endof this flexible ladder L is attached to a Windlass, M, which has its bearings in the reaches of the carriage, and which bears against said reaches, and on one end a crank-arm, M, having. a handle. It is obvious that this ladder may be made up of a meterial which will not readily burn when subjected to ordinary heat; and I also contemplate constructing all of these parts of my fire-escape which may be subjected to intense heat of a material and in .such manner that they will not injurously be impaired.

At the upper end of my vertically-extensible and portable fire-escape I have a horizontally-extensible fireproof bridge, 1?. This bridge is composed of two rails or walls, P P, which are extensible and provided with a flexible fire-proof floor, Pas, for instance, canvas(saturated in alum-Water) or other flexible refractory material which will extend and contract with the frame of the bridge. To practically construct such abridge I prefer to employ what are known as lazy-tongs or extension-levers, and to connect the inner ends of the lower series of levers to standards N N, rising from said platform-floor, and to allow the upper ends of the upper series of said levers to be guided by a stirrup, S, using long handles T T for the purpose of extending and contracting the bridge.

It will be seen from the above description that I am able to extend and to contract the tion by the internal bracing-bars thereof, which bars afford, in addition to the rounds of the 1adder,a safe means of descent and escape from a burning structure.

yielding qualities of the ladder,when erected, will allow the platform to be moved toward a window.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A vertically-extensible portable frame, in combination with a horizontally-extensible bridge provided with a flexible fire-proof canvas floor and means for extending the same, all substantially as described.

2. Thecombination, with the reaches of a A carriage, of an extensiblelaz'y-tongs frame, an extensible platform at the upper end thereof provided with a fire-proof fabric, applied as described, with a ladder arranged inside of said frame and adapted to bear on the internal fulcrum-bars of the levers thereof, substantially as described.

3. The combination of vertically-movable lazytongs or levers, the platform at the upper end thereof, the horizontally-extensible bridge provided with a flexible floor, the internal bracing-bars, G, a Windlass and a lever, T, all constructed and adapted to operate substantially in the manner and for the purposes described.

4. The combination of a vertically-extensible lazy-tongs frame, with a cage or platform at the upper end thereof, a horizontally-extensible frame applied to the said platform, and flexible fire-proof canvas floor therefor, substantially as described.

5. In a fire-escape, the combination of a horizontally-extensible fire-proof bridge, a flexible fire-proof floor therefor, a verticallyextensible frame, a flexible ladder inside thereof, and a carriage on which the whole is mounted, substantially as described.

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

JESSE A. ORANDALL.

\Vitnesses:

W. R. KEYWORIH, F. O. MCCLEARY.

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