US1101949A

US1101949A - Ladder.

Info

Publication number: US1101949A
Application number: US79477313A
Authority: US
Inventors: La Verne W Noyes
Original assignee: Aermotor Co
Current assignee: Aermotor Co
Priority date: 1913-10-13
Filing date: 1913-10-13
Publication date: 1914-06-30
Anticipated expiration: 1931-06-30

Description

LA VERNE W NOYES.

LADDER.

APPLICATION FILED 0015.13, 1 913. 1,101,949, Patented June 30, 1914 h 7 7 I 8 I I a UNITED STATES PATENT sic.

LA VERNE W. NOYES, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE AERFIOTOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LADDER.

To all whom it may concern Be it known that I, LA Vnnnn WV. NOYES, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Ladders, of which the following is a. full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to ladders and has for one of its objects the construction of a ladder wherein a side-rail may be sectionally formed, and in which the side-rail sections are individual to the ladder rounds. Each composite unit comprising a side-rail section and a ladder round is formed of a single piece of iron rod having two portions bent substantially at right angles to each other, one portion constituting the round and the other portion constituting the siderail section. The end of each side-rail section remote from the round integrally connected with such section is preferably formed with an eye in which is received the outer end portion of the ladder round adj a cent this end, the ladder thus including a series of interconnected angular links. The side-rail of the ladder companion to the sectionally formed sideel'ail is integrally formed or unitary, the inner ends of the aforesaid ladder rounds being fixedly secured to the integrally formed side-rail, the

ladder rounds being preferably threaded at their ends adjacent the integrally formed side-rail and passing through said latter side-rail so as to be clamped in engagement therewith by means of nuts applied to the threaded ends of the rounds. The invention is not to be limitedL to these preferred characteristics.

I have specifically embodied my invention in a construction in. which two ladders formed as above described are located side by side with the adjacent integrally formed. side-rails in fixed relation to produce a. ladder more readily to accommodate both feet of the climber although the invention is not to be limited to this double ladder formation.

I will explain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof and in which Figure 1 is a side levation of a portion Specification of Letters Patent. 7 Patented June 30, 13914.

Application filed. October 13, 1913.

Serial No. 794,773.

of a ladder constructed in accordance with the invention; Fig. 2 is aside view of the structure shown in Fig. 1; Fig. 3 is a plan view on. line 3 3 of Fig. 1 on a larger scale;

Fig. 4 is a detail view on a larger scale on line a 4: of Fig. 1; Fig. 5 isa view of a part of the structure as it appears in Fig, 1, on a larger scale; Fig. 6 is a sectional view on line 6 6 of Fig. 1; and Fig. 7

is a side view of the structure shown in Fig. 6 without the integrally formed siderail and clamping nut.

Like parts are indicated by similar characters of reference throughout the different figures.

The ladder illustrated is a double ladder produced by the formation of two ladders side by side, these two ladders, respectively, including integrally formed unitary rigid side-rails .1, 2 which are brought into fixed relation by being constituted of the two sides of an angle iron, as illustrated most clearly in Fig. 3. The use of an angle iron to furnish the connected integrally formed side-rails of a double ladder enables me to employ this same element as one of the inclined angle iron legs of a tower which is so commonly supplied for supporting wind mills, tanks, etc. Each ladder of the double or composite ladder includes a' series of rounds 3, each provided with a shoulder or flange 4 near its inner'en'd (Fig. 3) to engage the outer surface of its associate integrally formed side-rail, the inner end of each round being threaded and deflected at right angles to its associate integrally formed side-rail so as properly to pass therethrough. This construction enables the application of a clamping nut 5 to the inner threaded end of each round 8 to effect clamped engagement between the shoulder 4 of such round and the associate inter grally formed side-rail. The outer end of each round 3 is merged with a unit 6 of the .s'ectionally formed side-rail, each of these The topmost unit of each ladder is preferably of the formation illustrated most clearly in Figs. 6 and 7 the upper end of this topmost unit 6 being horizontally continued at 8, the horizontal continuation 8 having a shoulder or flange formation 9 near its inner end (Figs. 6 and 7) to engage the outer surface of its, associate integrally formed side-rail, the inner end of each round being threaded and deflected at right angles to its associate integrally formed side-rail so as properly to. pass therethrough. This construction enables the application of a clamping nut 10 to the inner threaded end of the extension 8 to effect clamping engagement between the shoulder 9 of such extension and the associate integrally formed side-rail. The topmost unit of the sectional side-rail is thus fastened directly to the as sociate integrally formed side-rail, the flange 9, unlike the flanges 4t, being flattened sulliciently to permit it to be passed through the eye of the unit 6 immediately beneath, in assembling the structure. Each round and the sectional side-rail unit 6 merged therewith are desirably formed of an iron rod, each eye '2' being located between the adjacent unit 6 and the integrally formed siderail and being in contact with such adjacent unit, the whole structure being such that the sectionally formed side-rail maintained in fined relation with the companion integrally .tori'ned side-rail. It will be observed that the extension 8 at the top of each. ladder takes part in supporting the load imposed upon each of the underlying rounds and that each round takes part in supporting the load imposed upon the rounds beneath, the force of the load being transmitted through the side rail sections 6 that intervene between the round 3 initially supporting the load and the rounds above. I believe it to be novel thus to distribute the load among the rounds, particularly when such distribution is effected by linked composite units each including a side rail section and a ladder round in combination with the rigid integrally formed side-rail that ultimately supports the sections of the sectionally formed side-rail through the intermediation of the ladder rounds individual to said sections.

It is obvious that the double ladder illustrated in the drawing is in the form of two single ladders whose adjacent integrally termed side-

rails

1 and 2 are merged as indicated. in Fig. 3 and the invention is not therefore to be limited to the double ladder construction illustrated nor is it to be limited to the precise details of construction shown as changes may readily be made Without departing from the spirit of my invention.

jlNhere a double ladder formation is prov ded. the rounds 3 entering lnto each may be made shorter than would be desirable in a single ladder.

Having thus described my invention I claim as new and desire to secure by Letters Patent the following 1. A ladder structure including two connected unitary side-rails formed of the sides of an angle iron; ladder rounds connected with each side-rail; and a second side-rail complemental to each of the aforesaid side rails and including adjoining connected sectionsin its formation each individual to and 'itegrally formed with a ladder round, sections of the sectionally formed side-rails terminating in eyes in which are received adjacent ends of ladder rounds individual to adjacent ladder rail sections.

2. A ladder structure including two connected unitary side-rails formed of the sides of an angle iron; ladder rounds connected with each. side-rail; and a second side-rail complemental to each of the aforesaid siderai'ls and including adjoining connected sections in its formation each individual to and integrally formed with a ladder round.

A ladder including a unitary side-rail; ladder rounds connected with said side-rail; and a second side-rail including adjoining connected sections in its formation each individual to and integrally formed with a ladder round, sections of the second side rail terminating in eyes in which are re ceived the adjacent ends of ladder rounds in dividual to adjacent ladder-rail sections.

4t. A ladder including a unitary side-rail; ladder rounds connected with said side-rail; and a second side-rail including adjoining connected sections in its formation each individual to and integrally formed with a ladder round.

In witness whereof, I hereunto subscribe my name this eighth day of October A. D.,

LA VERNE W. NOYES. lVitnesses:

L. C. \VALKER, D. R. Scnonns.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C,