US93323A - Improved convertible ladder - Google Patents

Description

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HENRY B. MALBONE, OF GENEVA, NEW YORK, ASSIGNOR TO HIMSELF, D. E. MOORE,

' vAND WILLIAM J. MORSE.

Letters Patent No. 93.323, dated August 3, 1869.

` IMPROVED CONVERTIBLE LADDER.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it may concern:

' invented a newfand useful Improvement in ConvertibleLadders; and'I do hereby declare that the followmg 1s afull, clear, and exact description thereof, which will enable others skilled inthe art to make and use the same, reference being had to the accompanying drawlngs, forming part-of this specification.

This 1nvention relates to a new and useful improvement m ladders, whereby they are made convertible to various purposes, and consists in so constructing it thatlts shape and confonnaiion may be readily changed, .sc as' to adapt it to various purposes, as will be here'- lnafter described.

yIn the accompanying sheet of drawings;-

Figure lrepresents a view of a ladder, made in three sections, with the sections placed as lwhen forming. a long ladder. l

Figure 2 shows the three sections still united togethe'r, but placed so as to form a staging.

Figure 3 represents the three sections as forming a Self-supporting step-ladder.

Figure 4 represents them as forming a bench.

Similar letters of reference indicate corresponding parts.

A, B, and C represent the diiferent sections.

D represents thc joint-rounds, by which the sections' are at all times united. v v

In thc sections B and O, these jointrounds pass through slots instead of round holes, as seen inthe drawing at e.

The lower ends of the rails of the two upper sections B and C are forked, as seen at j, which forks, when the sections are together, as seen in iig. 1, slip down and over the rounds g g, and thus support the ladder when extended as seen.

The slots c allow of this arrangement, and it will be seen that by raising the section B the length of the slot from it, and the section O the length of the slot from B, the sections may be turned on the joint-rounds, and the ladder made to assume the positions seen in the other iigures.

h, in the section O, represents circular recesses for engaging withthe lower round of' the section A, and supporting the step-ladder, as. seen at t' in fig. 3.

lo render the ladder thus convertible, each of the upper sections is diminished in widthfrom the section below, to the extent of the thickness of the rails,

'as seen in' the drawing.

The advantages of this arrangement are many. The ladder can at any time be diminished in length, if necessary, and 'the other forms into which it can be convertible are each separately of scarcely less importance and value than the extended ladder itself.

Having thus-.described my invention, v

I claim as new, and desire to secure by Letters Patent- 1 A sectional ladder, the sections of which are connected by the rounds of the ladder passing through slotted holes, the ends being provided with open slots, and the upper section witha notch or stop, in lsuch a manner that the sections may foi'n1-.a-eontinuous,or step-ladder, substantially as and for the purpose set forth.

HENRY B. MALBONE.

Witnesses IRA PARKER, G. PARKER, Jr.

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