US1101359A

US1101359A - Ladder.

Info

Publication number: US1101359A
Application number: US82066514A
Authority: US
Inventors: Thomas Thompson
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-02-24
Filing date: 1914-02-24
Publication date: 1914-06-23
Anticipated expiration: 1931-06-23

Description

T. THOMPSON.

LADDER.

APPLICATION FILED FEB. 24, 1914.

1,101,359. Patented June 23,1914.

W] NESSES 4 J INVENTOR THOMAS THOMPSON, OF BRIGHTON, IOWA.

LADDER.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed February 24, 1914. Serial No. 820,665.

To all whom it may concern Be it known that I, THOMAS THOMPSON, of Brighton, in the county of Washington and State of Iowa, have invented certain new and useful Improvements in 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.

This invention relates to an improvement in ladders and more particularly to the construction and manner of securing the rungs in place,-the object of the invention being to so construct the rungs of a ladder and secure them to the uprights in such manner as to facilitate the ready assembling of the parts and insure the strength and rigidity of the latter.

WVith this object in view the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a face View of a ladder embodying my invention. Fig. 2 is a sectional view of the ladder. Fig. 3 is a Separate view of one of the rungs, and Fig. I is a view of a modification.

l. 1, represent the uprights of a ladder which may be conveniently made of wood. To the inner faces of these uprights at points where it is desired to locate the rungs, plates 2 are rigidly secured by means of suitable fastening devices, such as screws. Each plate 2 may be made elliptical in form but in any event its upper end is made curved as clearly shown in Fig. 2.

Each rung 3 is made preferably of metal and of curved cross-section. The rungs thus formed are placed between the

uprights

1, 1, with their ends engaging the curved upper ends of the plates 2, by which latter said rungs are effectually supported, but in assembling the ladder the ends of the rungs will be caused to tightly engage and preferably be somewhat embedded in the wood of the uprights so as to prevent possibility of accidental vertical displacement. In order that the rungs shall be very tightly held between the uprights with their ends preferably embedded slightly therein, said uprights are connected by cross-rods or braces 4 which pass through the curved or segmental rungs, and may be in close proximity to the tops thereof so as to be disposed directly under the tread portions of said rungs. The brace rods i also pass through suitable holes in the plates 2 and through the uprights -1, 1. 'One end of each brace-rod may be provided with a head and the other end with a nut, or if desired both ends of each rod may be threaded to receive nuts 5, as shown in Fig. 1.

In the construction shown in Fig. 4, the plates 2 are made with curved slots 6 to receive the ends of the curved rungs.

My improvements provide a ladder which as a whole is of substantial construction and in which the rungs are rigidly secured to the uprights and capable of withstanding considerable weight. The parts are exceedingly simple in construction and may be readily and quickly assembled.

Having fully described my invention what I claim as new and desire to secure by LettersPatent, is:

1. In a ladder, the combination with uprights and rungs of segmental cross section,

of plates secured to the inner faces of said uprights and having curved engaging edges for the reception and support of said segmental rungs, and brace rods connecting said uprights.

2. In a ladder, the combination with uprights and plates secured to the inner face thereof, of rungs having segmental cross section disposed between said uprights and supported by said plates.

3. In a ladder, the combination with up rights, of plates secured to the inner faces thereof and provided with curved engaging edges for rungs, and rungs having segmental cross-section secured between the uprights and resting on said curved engaging edges.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

THOMAS THOMPSON. Witnesses:

H. E. SPIELMAN, G. V. ROBISON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G."