US869047A

US869047A - Ladder.

Info

Publication number: US869047A
Application number: US38250407A
Authority: US
Inventors: John S Baker
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-07-06
Filing date: 1907-07-06
Publication date: 1907-10-22
Anticipated expiration: 1924-10-22

Description

PATENTED OCT. Z2. 1907.

`J. S. BAKER.

LADDER.

` APPLICATION FILED JULY6,1-907.

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JOHNS. BAKER, OF EVANSV'ILLE, WISCONSIN.

LADDER.

Specification of Letters Patent.

Patented Oct. 22, 1907.

Application filed .my 6,1907. serai No. ssa 504.

. other towers.

It contemplates a novel construction wherein the corner posts or supporting standards of the tower are utilized to form one side of the ladder, a novel manner of attaching angle side pieces to the girths commonly used in structures of this character and a novel arrangement whereby steps of peculiar construction are attached to one corner angle of the tower and to the side rail forming the opposite vertical part of the ladder.

The object of the invention is to provide a construction which will be exceedingly convenient to climb, ship and erect, which will be reliable, strong, sightly and comparatively cheap to manufacture.

.I have not deemed it necessary to show the entire windmill tower, but show one of the corner posts or sup porting standards, a girth, and the opposite vertical` angle piece with a step attached thereto, and the means for attaching the girth to the inner angle pieces.

In the drawings: Figure 1 is abroken perspective view showing-the 'corner support of a windmill tower, girth, step, and means whereby these parts are connected;

Fig. 2 is a horizontal sectional view taken on line 2-2 of Fig. '1; Fig. 3 is a section taken on line 3 3 of Fig.V 1, the girth being in elevation; Fig. iis a sectional View of the girth, inner angle pieces, etc.; Fig.,5is a cross section of the form of step shown in Figs. 1, and 2; Fig.v 6

is a top plan vie'w of a modified form of step, and Fig. 7

is a top plan or edge view of the step of the form which I prefer, or the step shown in Figs. 1 and 2.

Referring lto the drawings, the numeral 1 designates one 'of the corner supports of the tower, which may of course, be of any suitable length and ;constructed in proper sections.` The numeral 2 designates a girth, which in the present instance I make in the form of an angle presenting top face 3 and side face 4. These girths may be employed at suitable intervals'to give the desired strength to the structure.

The corner standards of the tower, or posts, are in the form of angle bars having flanges 5.and 6. At intervals,-

the girths 2 are attached to the angle 6 of the corner posts or standards by means of bolts 7. The numeral 8 designates the inner side piece of the ladder which is formed of a number of angle pieces 9 presenting

iianges

10 and 1 1. Wherever a girth occurs in the tower, which in practice would be about five feet six inches apart throughout the height of the tower, I secure to them the angle pieces 9 by the means which will now be described.

The angle pieces overlap each other for a short distance, and the upper and lower ends of the angle pieces 9 are provided with perforations l2 for the passage of a l hook bolt 13 whose inner hooked end 14 embraces the top flange or piece 3 of the girth, which girth at this place formsa step. Abutting against the flange 10 of the angle piece 9 is a tubular washer 15, through which the threaded shank 16 of the hook 13 passes and receives the nut 17, which when tightened, firmly secures the girth and the angle pieces together', as is clearly shown in Figs. 1, 3 and 4.

The numeral 18 designates a step formed preferably of sheet metal bent into a U-s'hape or approximately so,

v as shown in Fig. 5 of the'drawings, This construction in cross section occurs throughout the entire length of the step narrowing however, at the ends where said ends are flattened together as shown at 19 and provided with off-sets 20, shown clearly in Figs. 2 and 7.

As shown in Fig. 1, one end/of the step is inserted into a slightly elongated aperture 21in the flange 6 of the corner standard of the tower, while the opposite end of the step is passed through a similar aperture or slot 22 in -the flange 10 of one of the angle sections of the inner side piece-of the ladder. Wherever the girths appear throughout the height af the tower, they serve as steps, and the manner of attaching the inner angle pieces 8 is the same with relation to each girth. Inpractice, the girths occur after each third step, or about fivefeet and six inches apart. l I I l In Fig. 6 I show in plan view a slightly modified form of step. In this instance, the step is angularin form presenting, between its ends a top ange 23 and a side flange 24. The ends are bent as indicated at 25W. ich

is a position in which they would enter the slots in the` the tower instead of following the corner as shown in f the drawings.` In this instance, the angle pieces 9 would be duplicated. Nor do I limit myself to the form of the steps shown, as they may consist of pipes with flattened ends provided with off-sets adapted to extend through the slots in the angle pieces, or of solid bars with ends attened and off-sets.

Claims.

1, A ladder of the character described, comprising side pieces having oppositely disposed slots therein, a series of steps having fiat olf-set ends entering the slots in the side pieces, and retainedtherein by said olf-set ends.

'2. A ladder of the charactendescribed, comprising side pieces having oppositely disposed slots therein, a series of steps formed of sheet metal, U-shape in cross section for the greater part-of their length and having attened ends forming off-sets that enter the slots lx1 the side pieces.

3. In a ladder for windmill or like towers, the comblnation with the corner'post or support of the tower, provided with slots or openings, a rail parallel with the corner post and also provided with slots, a plurality of steps having flattened and ott-set ends adapted to enter the slots in the corner post and the rail parallel therewith, and be retained by said off-sets.

4. In a windmill or like tower, the combination with the corner post thereof having slots or openings therein, a rail parallel to said corner post and also provided with slots, a plurality of steps formed of sheet metal. substantially U- shape .in cross section for the greater part of their length and terminating in flattened oE-set ends, one end being adapted to enter the slot in the corner post and the other to enter the slot in the rail, parallel to said post.

5. In a windmill or like power, the combination with the tower girths and one corner post of lthe towel-,having slots therein, a rail parallel with the corner post and formed of sections overlapping at the girths and provided with apertures, a hook bolt passing;` through. the ends of the rail seetionsand embracing the girth whereby the sections of said rail are held together and to the tower girth` and steps suitably attached to the corner post and to the rail.

G. In a ladder for windmill and like towers, the combi nation with the horizontal girths thereof, two parallel rails forming the side rails of the ladder and provided with slots or openings, the rails being formed of sections with their ends overlapping and provided with apertures, a hook-bolt passing through the apertures and embracing the girth whereby the rail sections are held together and to the girths, and steps'substantially 'LT-shaped in cross section for the greater part of their length and provided with flattened ends having olf-sets which enter the slots in the side rails.

In testimony whereof I aix my signature in presence of two witnesses.

JOHN S. BAKER.

Witnesses L. II.' SILLowAv. E. (Y, UPHoFr.