US1491648A - Ladder - Google Patents

Description

April 22 1924- WITNESSES VIII/[IA w. J. WAYNE LADDER Filed Aug. 29 1922 F l'l'g.2.

r c G INVf/VTUR I ATTORNEYS Patented Apr. 22, 1924.

term

WILL J. warm, or ast s,"itas s,

Application filed August 29, 1922. Serial No. 584,974.

To all whom it may concern:

Be it known that I, WILL J. WAYNE, a citizen of the United States, and a resident of Decatur, in the county of Macon and State of Illinois, have invented a new and Improved Ladder, of which the following is a full, clear, and exact description.

The present invention relates to new and useful improvements in ladders and pertains more particularly to ladders of the extension type.

It is one of the objects of the invention to provide a ladder which is light in construction and, at the same time, possessed of greater strength than is a ladder as ordinarily constructed.

It is a further object of the invention to construct a ladder so that the same is readily assembled and disassembled without in any manner destroying or defacing any of the several parts thereof.

With the above and other objects in view, reference is had to the accompanying drawings, in which- Figure 1 is a view in side elevation of a ladder constructed in accordance with the present invention;

Fig. 2 is a front view thereof;

Fig. 3 is a view in side elevation showing one of the steps in the assemblage of the ladder;

Fig. 4 is a transverse sectional view taken through one of the rungs of the ladder and on the line H of Fig. 2.

Referring more particularly to the drawings, the ladder comprises two side rails each comprising members 11 and 12, rungs l3, and securing means in the form of bolts or other suitable fastening elements 14:. The side members 11 are formed with spaced cut-out portions 15, and said cut-out portions while they are shown curved may be of any form desired. As shown, the lowest portion of each of the cut-out portions is positioned the same distance'from the straight edge 16 of the side member 11 and the posts or projections formed by providing the cutout portions 15 are of various lengths, the longest post being disposed centrally of the ends of the side rails. By this construction a. line drawn from one end to the other of the side members 11 and engaging the upper end of each of the posts 17 would be curved since the posts on opposite sides of the center post shorten as they approach the ends of the rail. Each end of the side rail is provided with an angular face 18, the purpose of which will be hereinafter described. Each of the posts 17 is provided with an opening 19 to receive the ends of the rungs 13 to secure the same in position. i

The side members 12 are of uniform dimension throughout their length and are of such a size that they will he possessed of a strength equal to the minimum strength of the side members 11.

In assembling the ladder the rungs 13 are positioned in the side members 11 andthe side members 12 are then secured to the side members 11. In securing the side members 12 to the side members 11, one end of the side members 12 is bolted or secured to one end of the side members 11 by the fastening means 14, as shown in Fig. 3. After this has been done, the side members 12' are brought into engagement with the post 17 nearest the secured end and a bolt 14: 1s

passed through the side members 11 and 12,

said bolt passing through the rung carried by this post and serving to secure the rung in the side members 11. The side members I 12 are secured to each succeeding post in the same manner, it being understood that during the securing of the side members 12to their respective side members 11, said side members will be sprung or placed under tension, which tension will be partially transferred to the side members 12 and place them under partial tension also.

From the foregoing it will be apparent then that both of the side members 11 and 12 of the ladder will be sion, thus greatly increasing the strength of as v placed under tenthe completed ladder and, at the same time,

permitting of lighter material being usedin the ladder construction. to disassemble the ladder it is only necessary to remove the several bolts 14 when the several parts of the ladder will be capable of disassembly without injury thereto.

From the foregoing it is apparent'then When it is desired that the present invention provides a new and improved form of ladder which is both light and strong and. of comparatively low cost of manufacture. Furthermore, the invention provides .a ladder whichmay be readily disassembled if desired.' i

hat is claimed is:

A ladder comprising two parallel side rails, each of which consists of two members,

e f. s id members b ing ifo imerd wi a plurality of integral posts eiichj 'hvifig "an aperture therethi'ough, rungs having their ends disposed in said apertures th'e'j'other 5 member of said side rail being secured 1i6 the first-mentioned side rail membepb means of bolts passlng through both of Said members; thrgugh the apelitured pests transversely ofsaid apertures and th-r0ugh the rungs mounted therein; to prevent longitudiil al movement of the rungs in a direction transversely of the ladder.

WILL J. WAYNE.

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