US479257A - Fire-escape - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

O. F. EKMAN.

FIRE ESCAPE I No. 479,257. Patented July 19, 1892.

N VEN @rl 27 11 66070 BY M I ATTORNEYS (No Model.) 2 Sheets-Sheet 2.

0.1. BKMAN. FIRE ESCAPE.

No. 479,257. Patented July 19, 1892.

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UNITED STATES PATENT OFFICE.

CARL F. EKMAN, OF MARSHALLTOXVN, IOlVA.

FIRE-ESCAPE.

SPECIFICATION forming part of Letters Patent No. 479,257, dated July 19, 1892.

Application filed February 9 1892. Serial No. 420,929. (No model.)

To all whom, it may concern.- Be it known that l, CARL F. EKMAN, residing at Marshalltown, Marshall county, Iowa,

have invented a new and usefulllnprovement in Fire-Escapes,-of which the following is a specification.

This invention relates generally to fire-escapes, and particularly to an improvementin that class thereof known as portable extension-ladder escapes.

The object of my invention is to' provide a ladder that can be quickly and easily extended at any desired angle.

It is also the object of my invention to connect the hose with said ladder in order to make a water-tower of the same in extremely dangerous cases, and it is also intended to attach hoisting devices to the ladder, whereby a number of people can be rescued at one time, similar to ordinary hoist-escapes.

A further object of my invention is to provide for the balancing of the ladder truck or frame.

With these various objects in view my in vention consists in the peculiar construction of the several parts and their novel combination or. arrangement, all of which will be fully described hereinafter, and pointed out in the claims.

In the drawings forming a part of this specification, Figure 1 is a vertical sectional View showing the ladder extended. Fig. 2 is a side view showing the ladder folded. Fig. 3 is a sectional end view. Fig. 4: is a detail view of the locking-frame. Fig. 5 is a detail view of the hose-reel, &c.

In the practical embodiment of my invention I employ a suitably-supported wagonbody or truck 10, which is provided with a central cross beam or block 10. A laddercarrying frame 11 is arranged upon the truck 10, said frame 11 being provided with a central bearing-plate 11, which rests upon the cross block or frame 10, and said frame and truck are connected with each other by means of a pivotal bolt 11, which is passed through the said bearing-plate and beam. By this construction the frame 11 is adapted to turn horizontally upon the body or truck, for a purpose hereinafter explained. Parallel upright standards 12 12 are secured to the frame 11 upon opposite sides near the center of the same, and connecting the said standards near their upper ends is the horizontal cross-bar or journal 13, upon which is mounted the lazytong extension-ladder 14. The lazy-tongs of this ladder are peculiarly constructed, inasmuch as the links or levers comprising the structure are continued beyond the outer joints or pivots 14 and the ends of the opposing links or levers connected by means of the rounds or bars 15, thus producing a ladder which can be easily ascended or descended, as by extending the links or levers the rounds are brought sufficiently close to one another to permit such ascent or descent even when the tongs are extended to their full extent. A cross-bar 16 connects the lower ends of the inner set of prime levers 16, and to said cross-bar 16 is attached an elevating strap or cable 17, which in turn is connected with and adapted to be wound upon a drum or spool 17, journalcd in the ladder-carrying frame. The drum or spool 17 is revolved by means of a crank 17 ,and by revolving said drum or spool the strap or cable is wound thereon, and

the latter will be extended as usual in this class of escapes.

In order to lock the ladder in any desired position, I provide a locking-bar 18, which extends transversely across the frame near the bottom of the same, but above the strap or cable 17, and to the cross-bar 16 is hung the toothed frame 18, which extends inwardly across the transverse locking-bar and is provided with a series of ratcl1etteeth upon its lower face, which engage the said locking-bar, and thus hold the tongs extended. By having the frame provided with ratchet-teeth it will slide freely over the locking-bar when the ladder is being extended, and will look by its own weight as soon as the tension is released. A rope 18 is attached to the free end of the toothed frame and passed over the journal 13, wherebyv the teeth of said frame can be lifted out of engagement with the lockingbar when it is desired to contract the ladder. Toothed sectors 19 are rigidly secured to the outer set of prime levers 16, the curved or toothed sides of said sectors projecting clownwardly, as shown. A shaft 19 is passed transversely through the frame 11 upon the side opposite the winding-drum, and upon said shaft are mounted the pinions 19", which engage the teeth of sectors 19. The shaft 19 is operated by means of a crank 19, and also carries a ratchet-wheel 19 which is adapted to be engaged by a pawl 19", pivoted to the side of the frame. By revolving the shaft in either direction the ladder, eithervbefore or after extension, can 'be adjusted to the desiredinclination, and the pawl-19, in connection with the locking-frame 18, will serve to hold the ladder in its extended and adjusted positions. A lever 19 is connected with the pawl 19, whereby said pawl can be readily thrown into or out of engagement with the ratchet-wheel.

Uprights 2O 20 are secured to the frame 11 adjacent to the pinion-shaft, and between said uprights is journaled a hose-reel 21, said reel having a spring winding mechanism 22 attached to one end of the same, anda pawl 23 is employed in connection with said mechanism to lock the same after it has been wound, as hereinafter explained. The waterhose 24 is wound upon the reel 21, the nozzle of said hose being adjnstably mounted upon a cross-rod 25, which connects the upper links of the lazy-tongs, and connected with said nozzle are the ropes 24, one upon each side of the ladder, by means of which the nozzle can be drawn from one side to the other in order to throw the stream in any desired direction. Pulley-blocks 26 are attached to the upper portion of the ladder upon opposite sides of the same, and through said blocks are passed the ropes or cables 26, to which are attached the baskets or carriages 26",tl1e opposite ends of said ropes beingconnected with a transverse winding-shaft 26, journaled in the uprights 20 20 above the hose-reel, whereby the saidbaskets or carriages are raised to and lowered from the windows of a building, and by winding the ropes in opposite directions upon the shaft 2O one basket will be ascending as the other one is descending.

From the above it will be seen that I provide a compact and efficient fire-escape and ladder, which can be rapidly transported from place to place.

The wagon or truck is usually stopped in the middle of the street and the ladder-frame released and swung around at right angles to the said body or truck, the ladder being inclined toward the building to which it is to be raised. The hose-reel upon the opposite end of the frame acts as a counterbalance to the ladder in maintaining the steadiness of the frame; but to prevent any movement whatever I provide the legs 27, which are hinged to the corners of the frame and adapted to be turned down to support said frame. The frame having now been adjusted, the ladder is extended by winding the strap or cable upon the winding-drum, and the inclination out of engagement with said mechanism, and

of said ladder can be regulated at any time by means of the toothed sectors and pinionshaft. In case the hose is elevated with the ladder, the spring mechanism of the reel is Wound as the hose is unreeled, and when the ladder is to be contracted the pawl 23 is thrown the spring will cause the reel to automatically wind the hose thereon.

By means of the winding-shaft 26 the haskets or carriages can be raised and lowered, as already described.

The links being extended beyond the outer joints of the lazy-tongs is quite an essential feature, as by connecting said ext-ended ends by means of rounds I provide the necessary ladder, which can be easily ascended or descended, asthe rise from one round to the other is never too great. One prime lever being attached to the the sectors, which are always secured, the ladder can be easily extended by operating upon the other prime lever.

While I have shown and described handpower devices for raising and lowering thevarious parts, it is obvious that any suitable motive power may be employed, and any changes necessary to employ such preferred power can be readily effected.

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

1. In a fire-escape, the combination, with the lazy-tongs the links or levers of which are extended beyond the outer joints, of the rounds or bars connecting the ends of the said links or levers, substantially as shown and we described.

2. The combination, with the frame, of the upright standards, the lazy-tong extensionladder journaled between the same, the elevating-strap, the winding-drum, the locking- 105 bar, the toothed swinging frame connected with the ladder and adapted to engage the locking-bar, the toothed sector, the pinionshaft, ratchet-wheel thereon, and engaging pawl, all arranged substantially as shown and 1 10 described.

3. In a fire-escape, thecombination of a lazy-tong extension-ladder, a toothedsemicircular segment secured to one of the lower members, an elevating-strap attached to the 115 other lower member, the pinion and shaft for operating the toothed sector, and the pawl for locking the same, whereby the ladder can be adjusted at any suitable angle, and the winding-drum for operating the elevating 12o strap, substantially as shown and described.

CARL F. EKMAN. Witnesses:

J. B. PENon, HENRY MATTER.

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