US99706A - Improved scaffold and ladder - Google Patents

Description

fuient (Miller.

Letters Patent No. 99,706, dated Febrzimy 8,1870.

IMPRoimD SCAFIOLD AND LADDER.

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

To all whom it may conce/rn:

Be itknowu that I, J. E. RAUGH, oi' Selins Grove, in the county of' Snyder, and in the State of 4Iennsylvania, have inventedV certain new and useful Im provements in Combined Ladder and Elevating-Scafl' fold; and do hereby declare that the following is-a full,

clear, and exactdeseripiion thereof,.reference beingA had to the accompanying drawings and lto the letters of' reference marked thereon, making a part'of this specitication.

. The nature of my invention consists in the construction and arrangement ot'a combined ladder and elevating-scaffold, for painters or other mechanics7 use.

In order to enable others skilled in the art towhich my invention appertains to make and use the same, I will no w proceed to describe its construction and operation, referring to the annexed ,-drawings, in which- Figure l is a side elevation, and

Figure 2, a -front View of' the entire ladder and scaffold;

Figure is a perspective view of` au extra foundationframe;

Figure 4 is a plan view of a frame, att-ached to the toppt' the ladder, f'or the purpose of' keeping the laddertout from the building;

Figure 5 is a side view of a pulley; and

Figure 6 is a horizontal section of a portionof'the machine, tobe hereinafter described.

A represents the main ladder, made of any desired height, hav-ing two braces, B B, :hinged a suitable distance from its lower end. Ilhese braces are connected `by cross-bars, so as to f'orm a sort ot' foundation-frame for the ladder, it being the intention that the la-dder should not itself' rest on the ground, but be supported by the braces or legs B B. v

In mortises on the braces B B are secured segmental bars, C C, which"project inward, and pass through mortlses in the sides of the ladder A, where they are 4held at any point desired by means of' pins, as seen in fig. 1. -By this means', the foundationframe can'be placed at any angle desired from the main ladder.

At suitable points on the inner side of 'the main ladder A are secured metal plates or bars, which form guides to hold an additional ladder, D, within the sides of' the main ladder A, allowing the ladder .D to slide up and dou-'n with ease, but` preventing it from becoming separated from the .main ladder, unless so desired. 4

The extension ladder D is raised, by hand, as the workman passes up on the main ladder,.and it is held at any point desired, by means of a hook, a, secured to one of the rounds ofthe sliding ladder, and thrown over any of' the rounds of the main ladder.

In addition to this, a pin, b, is passed through the i side of the sliding ladder into the side of' the main ladder, as seen in lg. 2, by which means the sliding ladder D is firmly and securely held at any height desired.

At the upper end of the sliding ladder' D is attached a crossfbar, E, by means of pins or other suit able devices, so as to be Areadily. removed and put on. lEhis cross-bar E extends a suitable distance beyond the sides of the ladder D, and is at each end provided with a small wheel or roller, G, which bears against the side of the building, so asto facilitate the raising of' the ladder.` In attaching the cross-bar E to the ladder D, it should be done in such a manner that the cross-bar` can turn, it being rounded on the edge nearest to. the ladder, for that purpose. y

Near one end of' the cross-bar E is hinged an arm, I-I, having a metal point, e, atits outer end, and braced by the rod d, in the position shown in tig. 4;.

To the opposite side of' the bar E is secured a rod or lever, f, from ,the outer end of which `a cordior rope, c, hangs suspended. 4.

Then the ladder is being raised, the arms H H hang downward, allowing the wheels G G to bear against the side of the building; but as soon as it has been raised to the desired height, by pulling on the rope e, the bar E will be turned so as to bring the arms H H horizontally inward toward -t'he building, the points c c holding them steady, thus keeping the entire ladder in its properA position.

If the building should not be high enough to neeesi sitate the use of the sliding ladder D, the frameE G H isv attached to the upper end of the main ladder A. The means for attaching said frame to. either one of the ladders maybe of various constructions; but I prefer the means particularly shown in gs. l and 4, consisting ot' staples inserted in the bar E, and pins ,hungon said staples,-these pins being passed through the sides of' the ladders and held by other smaller' pins,

as shown iu figs. 1 and 2. The slidiugladderD being narrower than the main ladder A, there are blocks :1t-

tached to the sides of' the sliding ladder at the top, so-

of the arms J J, and are provided with square loops h 71., proiecting belowI the a1ms,and through said loop,

a wedge-shaped bar, M, is passed, which effectually se-' cures the platform to the carriage. v

Under the platform K is secured alatch, N, pressed port the carriage and platform at any desired height.

On the open side of the carriage I is placed a windlass, 0, having its bearings in the sides of the carriage, which extend forward beyond the front side of the ladder.

From they windlass O'a rope, k, leads upward around a pulley, m, suspended from the top round of the ladder D, and then passes downward on the inner side of the ladder, and is attached to the carriage I. By turning the windlass the carriage and platforms are raised and lowered` at will, the crank of the wiudlass being held, when desired,.by a book, n.

vVhen the carriage is to be lowered, the latch N will be withdrawn by a rope or cord, p, attached to its tinner end, as shown in iig. 1.

At the upper end of the carriage I, above the windlass O, is placed a roller,-P, which bears against the front side of the ladder and prevents friction in the raising and lowering of the carriage.

When the carriage I rises above -the main ladder A and follows the sliding ladder D, there would be a space left between said sliding ladder andthe sides of the carriage, which would cause the carriage to vibrate or move from side to side. To prevent this, I provide bars It R, which are placed in between the vcarriage and sliding ladder, in grooves provided for that purpose, on thevinside of the sides of the carriage. The bars R R are placed on the side of the ,earriage, in suitable guides, until they are wanted. At the upper ends of said bars are pins, which rest on the top of the side of the carriage, so as to be carried upward with the carriage to the top of the sliding ladder.

When it is desired to have a long scaffold, two of these machines are placed at suitable distance apart,

smoel 2 v and the beards forming the scabld are placed on a roller, S', running across the platform K, as seen in iig. 1. The object ofthe rollers S ls, that as the platforms are raised,.the boards will not more the platforms any farther apart, but allow them to remain in the same position as when pnt up.

If the main ladder A should be long enough for th building, the sliding ladder D may be taken out and the fbundation-frame .l, the construction of which is plainly shown in iig. 3, bolted to the same at its lower end. By then having` an extra carriage and upper brace-frame, the workman has two machines upon which to place his scaffold.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The arrangement upon the lower end of the ladder A of the braces B B and segmental bars C C, substantially as shown and described.

2. lhe combination ofthe cross-bar E, wheels G G, arms H H, points c c, braces (l d, lever f, and cord e, all substantially as andfor the purposes herein set forth. f

3. The carriage I, platform K, and latch N, constructed and arranged to operate in connection with the rounds ofthe ladder, substantially in thc manner and for the purposes herein set -forth.

4. In combination with the carriage I and sliding ladder D, the bars R R, substantially for the purposes herein set forth.

5. The combination of the fbundation-frame B C, ladders A D, top frame E G H, carriage I, platform K, latch N, windlass O, bars It R, and rollers P S, all' constructed and arranged to operate substantially in the manner and for the purposes herein set forth.

In testimouy'that'I claim the foregoing, I have here unto set my hand, this 10th day of J anunry,.1870.

J. E. RAUCH.

Witnesses C. L. EvER'r, C. M; ALEXANDER.

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