US244059A - Telescopic ladder - Google Patents

Description

(No Model.) 2 Sheets-Sheet P. W. HOPELE.

' TELESGOPIG LADDER. i No. 244,059. Patented JulylZ, 1881.

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(No Model.) 2 sshGem-31mm.2-.

'F. W. HOPELE.

. TELB$UOPIG LADDER. No. 244,059. Patented July 12,1881.

' UNITED STATES PATENT OFFICE.

FERDINAND W. HOFELE, OF BROOKLYN, E. 1)., NEW YORK.

TELESCOPIC LADDER.

SPECIFICATION forming part of Letters Patent No. 244,059, dated July 12, 1881.

Application filed July 23, 1880. (No model.)

To all whom it may concern:

Be it known that I, FERDINAND W. HOFELE, a citizen of the United States, residing at Brooklyn, E. D.-, in the county of Kings and State of New York, have invented certain new and useful Improvements in Telescopic Ladders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will 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 marked thereon, which form a part of this specification.

This invention relates to that class of extension-ladders wherein two ladders are united to make a hollow square, forming a guide in which other ladder-sections may slide.

The invention consists in providing such ladders with diagonal braces, in the manner hereinafter more fully set forth.

In the drawings, Figure 1 shows an elevation of a ladder constructed according to my improvements, with the sections partly raised; Fig. 2, a plan view of the ladder; Fig. 3, a side view, showing the diagonal braces; and Figs. 4, 5, and 6, enlarged details.

In the case here presented the ladder A is mounted upon a truck, B, and raised to a vertical position and held there in any suitable manner, but preferably by the means set forth in my application for a patent filed June 26, 1880, which it is unnecessary to describe herein, as they form no part of the invention here claimed.

Each section of the ladder consists of four corner-pieces, which may be formed either wholly of wood or of wood and an gle-irons, as shown in the drawings, in which 0 0 represent the wood part of the posts, and c the angle- 40 irons, one side of which is firmly secured to the wood by bolts or otherwise, and the other has bolted or riveted to it the diagonal braces D D, which may be riveted or bolted together where they cross each other.

As a further means of strengthening and bracing the ladder, the rungs E are provided with shoulder a and nuts I), the latter being countersunk into the posts, so as to present no obstacle to the free movements of the ladder-sections one within the other. If preferred, instead of the shoulder a, formed solid with the rung, a shoulder or nut, (I, screwed on the rung may be used.

By the construction here shown a very strong, stiffladder may be made, that maybe extended to any desirable length, and then be capable of sustaining any reasonable load, without danger of giving way or getting out of order.

I do not wish to be considered as claiming in this application. anything except the improvement distinctly pointed out in the following claim, as many of the parts herein shown are the subjectmatter of claims in my application aforesaid.

What I claim as new is A lad der-section of an extension-ladder composed of two ladders comprising four cornerpieces and uniting rungs or steps and diagonal braces, substantially as and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

FERDINAND W. IIOFELE.

\Vitnesses:

OLE H. HOLBERG, WILLIAM H. LEWIS.

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