US1397216A - Ladder - Google Patents

Description

G. A. JOHNSON.

LADDER.

APPLICATION FILED JAN. 20. 1919.

1,397,21 6, Patented Nov. 15, 1921.. i3 1 I N VEN TOR. WITNESSES: 6:201:96 HJMJ/L FFIQE.

TO WILLIAM. H. MINER, OF

LADDER.

Specification of Letters Patent.

Patented Nov. 15, 1921.

Application filed January 20, 1919. Serial No. 271,959.

T 0 cl] whom it may concern Be it known that I, GEORGE A. JorINsoN, a 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.

This invention relates to improvements in ladders.

The object of the invention is to provide a strong ladder more particularly adapted for permanent attachment to wall structures such as the walls of a car.

More specifically, the object of the invention is to provide a car ladder of strong, durable construction and one which may be readily manufactured and applied at comparatively small expense.

In the drawing forming a part of this specification, Figure 1 is a side elevational View of the end portion of a box car showing my improved ladder applied thereto. Fig. 2 is a vertical, sectional view taken substantially on the line 22 of Fig. 1. And Fig. 3 is an enlarged, horizontal, sectional view taken substantially on the line 3-3 of Fig. 1.

In said drawings, 10 denotes the side wall of a box car, 11 the roof thereof and 12 the usual step. The improved side ladder, as shown, consists of two stiles A-A and a series of rungs B.

Each stile A, as shown, is made from an ordinary commercial angle iron hav ng flanges 13 and 14. At each end of the stile, the angle iron is bent as indicated at 15 l5 in Fig. 2, in order to properly space the stile from the surface of the wall and at the ex treme ends, the flanges 13 and 141 of the angle iron are flattened into a common plane, as indicated at 1616, these flattened portions 16 being suitably perforated to accominodate securing bolts 17 or other securing means. As clearly indicated in Fig.3, the flanges of the angle iron stiles are disposed at approximately 45 to the wall of the car and with the angle between the flanges 13 and 14 at the greatest distance from the wall.

Each angle iron has the flanges 13 and 1 1 thereof provided with a plurality of henzontally alined perforations 18 and 19, the

perforations 1818 and l919 being separated vertically a distance corresponding to the desired distance between the rungs of the ladder. The rungs B are formed by sections of rods or bars, preferably round. these sections or bars being cut ed to such length that after being passed horizontally through the perforations 18 and 19 in the two stiles, the ends 20-20 of the rungs can be bent outwardly and then inwardly toward each other about the adjacent portion of the stiles as indicated in Fig. 1, thus avoiding necessity for upsetting of the rod metal. When the stiles are held in proper spaced relation, it is evident that the rungs B will be maintained taut and will aflord a firm grip. It will also be noted that by arranging the angle irons as shown and described, the same afford great strength against buckling or bending. In manufacturing the ladder, it is evident ordinary commercial angle irons may be employed and commercial bars or rods for the rungs. The angle irons can be perforated in the shop and the rungs applied thereto at coniparatively small expense. The ladder can be easily applied to new or old cars and a secure connection eflected inasmuch as the lower ends of the stiles can be bolted through the side sills 21 of the car and at their upper ends through the side plates 22.

Although I have herein shown and described what 1 now consider the preferred manner of carrying out my invention, the same is merely illustrated and I contemplate such changes and modifications as come within the scope of the claims appended hereto.

I claim:

1. In a car ladder, the combination with a. pair of angle irons constituting stiles, each angle iron having the flanges thereof arranged substantially at 15 to the wall of the car with the angle farthest from the wall, the ends of the angle iron having the flanges thereof flattened into a common plane to thereby adapt the angle iron to be secured to the car, each of said angle irons being provided with a plurality of sets of perforations, each set comprising two perforations, one in each flange, the perforations of each set being in horizontal alinement and the corresponding sets on the two angle irons being also in horizontal alinement; of a series of rod-like rungs extending straight through the corresponding sets of perforations, the ends of said rungs outside of the sills being curved around adjacent portions of the angle irons to thereby secure the rungs in place.

2. In a car ladder, the combination Witha pair of standard rolled shapes constituting stiles, each of said shapes having two sections thereof extending divergently to Ward the Wall of the car and With each section at an angle of less than 90 to said wall, each of said shapes having a plurality of sets of perforations and each set comprising tWo adjacent holes one in each of said sections, the holes in each set being disposed in horizontal alineinent, the sets of one stile being also in horizontal alinenient with the corresponding sets of the other stile; of a plurality of rod-like rungs extending through said perforations parallei to the Wall of the car, the ends of said rungs being bent over adjacent portions of said stiles to thereby retain the rungs in position.

In Witness that I claim the foregoing 1 have hereunto subscribed my name this 5th day of Jan, 1919.

- GEORGE A. JOHNSON.

Images