US272054A - Fire ladder - Google Patents

Description

2 Sheets-Sheet` 1.

(No Model.)

A. an A. I'SKB.

FIRE LADDER.

No. 272,054. Patented Feb. 13,1883.v

Paises@ E? LCM,y

(No Model) Y 2 sheets-sheet 2. 4

A. & A@ ISEE. PIRE LADDER. N0.'272,054. Patented Feb. 13,1883.

l UNITED STATES .ATENT OEEICE.

`ANTHONY ISKE AND ALBERT ISKE, OF LANCASTER, PA., ASSIGNORS F ONE-THIRD T() ROBERT M. SLAYMAKER, OE SAME PLAGE.

FIRE-LADDER.

SPECIFICATION forming part of Letters Patent No. 272,054, dated February 13. 1.883.

Application led May 10, 1882. (No model.)

residing at Lancaster, in the county of Laucaster and State of Pennsylvania, have invented certain new and useful Improvements in Ladders; and we do hereby declare the following to be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference markedV thereon, which form a part ofv this specification.

` This invention relates to ladders which are .adapted to he extended and used especially as detail view of one of the hooks for `attaching the ladders together; and Fig. 5 represents a perspective view of a portion ofthe lower ladder detached and unfolded.

The same letters designate like parts in all the igur'es of the drawings.

A in the above-named drawings designates 'the lower or first ladder, which is composed of three parts, B (l D; The lower end of lower f part, B, is pointed to receive a metallic clasp,

A', which is similarly pointed to project into and bear against the ground. This clasp is attached to each side of the ladder, and is secured thereto by any sui-table means. At Vthe lower end, on the side B ofthe lower part, B, or on both sides thereot, and ttin g into a recess therein, is a plate, b, having a wall or guard, b,formed on its side edges, to prevent the sliding pin c from moving sidewise, and a crosspiece, b2, formed at its outer end, which prevents the pin from moving` horizontally and guidessaid pin in a vertical direction parallel with the ladder. At the middle of said plate b we attach thereto, or drive into the sides B of ridges or serrations, b3.

the ladder, staples d, one on each side of' said plate b, in the slots d of which the ends of an eccentric lever, e, turn.

The operation of this device will be readily seen. Suppose the house at which the iire'has occurred to be situated along a hill. Of course ifa ladder is brought agalnst the house one side of the ladder will be found to be too short.

`ln order to provide for such an emergency, we

introduce the means before mentioned for lengthening either one of the sides of the ladder, so as to be adjustable to theirregularities ofthe ground. The device which we have shown operates so that the sliding pin c can be adjusted up and down by means ot' the eccentric e, which is turned downwardly and binds the pin at any point desired. The sliding pin or bolt has transverse ridges or serrations c on its outer tace. The face of the plate l) has similar These aid in holding the bolt when the eccentric binds against it. The pin or bolt is also pointed at its lower end, and has a liange, c', at its upper end, which prevents the pin from sliding down too far.

The part O` of ladder A is connected to the part B thereof by means of plates or braces C', which are secured to thepart C by screws or rivets, and to the part B by the rod B2, which forms a pivot for the said parts, and serves also to .support the ladder above it. A space is left between the ends of said parts, at the junction thereof', to allow free movement ofthe part B through the plates. These plates or braces O' fit into recesses in the sides of said parts and form a strong brace for the junction thereof, as they are attached on each side.. The upper end of part O has a pivot-rod, C2, passing across it and into the part D, which is connected thereto. Each side of part Dhas a longitudinal slot, d, parallel with thesides,through which slots extend studs df, erected on the sides B of part B, said studs and slots allowing the part D to be shifted longitudinally. At the middle of said part D is a brace-bar, E, connected to the sides thereof and passing across and underneath the same. This barbraces the sides of part D and prevents them from sagging either way, and it also serves as a supplemental brace for the upper part ofthe ladder when folded, as shown in Fig. 2. At the upper ends and to the sides of part D we at- IOO e efface-i1 tach, by rivets or bolts, arms F, Haring outwardly, and arranged to embrace the sides of a Window-sill and support the upper part of the ladder.

The construction of the remaining ladders (except the last) does not vary essentially from the first ladder, except that a modification of the manner of connecting the lower part, B, to the part C is introduced-that is, the braces or plates C', which are attached in the rst ladder to the upper part, C, and connected to the lower part, B, by the pivot-rod, are attached in the remaining ladders (except the top one, which does not require any) tothe lower `part and connected to the upper part by the pivot-rod. This construction, however, is immaterial, as either will answer the purposes.

v At the bottom end ot' each ladder, except the first, and to the inner sides thereof', is secured by bolts or rivets a down wardly-projectingjaw, G, having an inclined passage through the same, which is adapted to embrace the sides of the pivot-rod B2 and hold the ladder tirmly in an inclined position.

At the upper end ot' the top ladder, hooks H are secured thereto at its sides. These hooks serve to catch onto any convenient projection of the house-such as a window-sill--and t'orm a support for the top ladder. This ladder is also provided in the same manner with the jaws for connectingit with the preceding ladder. Each of the ladders may also be provided with the arms (similar to those attached to the tirst ladder) for embracing the sides of a window-sill and keeping the ladder hrm.

To adjust our extensionladder against a house We rst place the lower ladder in position, bending the parts thereof, so that one part forms the ladder proper, one forms a platform on which a person can stand, and the other part forms the brace against the house. We then put the succeedingladders on by passing the jaws thereot| over the pivot-rod, bending we claim as new, and desire to secure by Letters Paten t, is-

1. In a ladder or ladder-section, the main part B, in combination with the part G, hinged to the upper end of said main part and adapted to be bent to forth a platform, and the part D, which has pivotal connection with both-of said parts B and C,and is adapted to rest against the walls ot a building.

2. In combination with main part B ofthe ladder, the hinged part C, and the part D, which supports and braces it, said parts B and D having a stud-and-slot connection, substantially as set forth. i

3. 'In combination with main part B and hinged extension C, the bracing part D, which overlaps thejoints of said partsB and C when they are folded, and is provided with a cross bar or brace, E, substantially as .set forth.

4. In combination with a ladder and a guideplate attached to one side or the bottom thereof, a bar or pin which can be moved up or down in said plate, and a journaled binding cam or eccentric for locking said bar by turning down said eccentric in the desired position, as set forth.

In testimony whereof we aflix our signatures Y in presence of two witnesses.

ANTHONY SKE. ALBERT ISKE.

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