US58984A

US58984A - Improved ladder

Info

Publication number: US58984A
Authority: US
Publication date: 1866-10-23
Anticipated expiration: 1883-10-23

Description

UNITED STATES PATENT OFFICE.

Gr. OKERTIZZA, OF NEW YORK, N. Y.

IMPROVED LADDER.

Specification forming part of Letters Patent N0. 58,984, dated October 23, 1866.

To all whom it may concern:

Beit known that I, G. GKERTIZZA, of the city, county, and State of New York, have invented a. new and useful Improvement in Splicing Ladders; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation ofthe same, reference being had to the accompanyin g drawings, making a part of this specification, in which- Figure I is an elevation; Fig. II, a side view, showing the slots d d' in the upper or smaller ends ofthe sectional ladders; Fig. III, a side View, showing the slots c c in the lower or wider ends ofthe sectional ladders.

a a are the sides of the ladders; b b, slats with rectangular' sides, fastened securely, in like manner as, and supplying the place of, the lower round ot' the sectional ladders, and fitting in the slots d d; b' b', slats sinrilar to b b, and similarly fastened, supplying the place of the top round ot' the ladders, but protruding a few inches, more or less, through and beyond the sides a u, and the extremities thereoftting in the slots c c; c c', long or rectangular slots in the lower ends ofthe sides c' a', cnt in the direction with the rounds ot' the ladders, and fitting on b' b; d d', slots similar to c c' in the upper ends of the sides c a, similarlyr cut and iitting 011 b b; c c, rounds of the ladders.

The construction and operation are as fol lows:

The improvement in splicing ladders consists in an arrangement of several short or sectional ladders, which are constructed and fitted to each other in the manner hereinafter described.

The short ladders or sections are made of any desirable length and similar to each other.

The upper and lower rounds or slats, b and b', of each sectional ladder, placed at a suitable distance from the extremities of the sides a a, are constructed with rectangular sides, the upper one, b', protruding a few inches beyond the sides c a of the ladders. In each end of the sides a c elongated rectangular slots are cut, ot' such size, shape, and direction as to fit onto the bars c c' and d d'.

The sectional ladders are so constructed (broader at the lower extremity and growing gradually narrower toward the top) that when the bars b b and b b are titted into the slots d d and c c', respectively, the sides a a of each sectional ladder at the bottom are sntiiciently far apart to admit of the sides a a` at the top ot'any other sectional ladder passing within and between them, the outer side of the inner ladder lying in juxtaposition to the inner side ot' the other, as shown in Fig. I, the sectional ladders bein g thereby made interchangeable, anyone being made to tit onto anyother. These short ladders are adjusted and fitted together by slipping the narrow extremity of one within the wider extremity of the other, the bars l) b fitting into the slots d d', and the bars b b into the slots c c', and the ladders so placed are held in position by their own weight.

The ladder constructed by this im provement in splicing ladders has the advantages of great compactness, and may be easily transported from place to place. It may be extended to any desirable length, according as a longer or shorter ladder is needed. It maybe raised section by sectioni. c., one ladder heilig adjusted ,to the top or bottom of those already erected; or the various sections may be adusted to each other prior to raising, and the whole so constructed afterward raised like an ordinary ladder, as the convenience of place 0r available force requires.

Vhat I claim as my invention, and desire to secure by Letters Patent, is

The combination of sides so sloping that the narrow end of one sectional ladder fits within the wider end of any other, with the slots d d' and c c and the hars b b and b b', substantially as described, and for the purpose set forth.

G. UKERTIZZA.

VVltnesses:

M. M. LivINcs'roN, U. MonnILL.