US922878A

US922878A - Ladder.

Info

Publication number: US922878A
Application number: US43427008A
Authority: US
Inventors: Harvey B Fuller
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-05-22
Filing date: 1908-05-22
Publication date: 1909-05-25
Anticipated expiration: 1926-05-25

Description

H. B. FULLER.

LADDER.

APPLICATION FILED MAY 22, 1908.

922,878, Patented May 25, 1909.

2 SHEETS-SHEET 1.

H. B. FULLER. LADDER.

APPLICATION FILED MAY 22, 1908.

Patented May 25, 1909.

2 SHEETS-SHEET 2.

v i A r) d w spective View of a ladder embodying my tea rarest @FFTQE.

'HlinvEY s; FULLER, or ST. PAUL, MINNESOTA.

LADDER.

Toi'all whom it may wnceivt:

.Be it known that I, HARVEY B. FULLER, a

' citizen of the'United Stategresidingr at St.

Paul, in the county of Ramsey and State of ,'Minnesota, have invented certain new and useful Improvements in Ladders, of which the following is a specification.

My invention relates to improvements in the construction of ladders, its object being particularly to construct a ladder of metal so bent and with the parts so connected together as to be of maximum rigidity and strength the minimum of mechanical parts. To this end my invention consists in the features of construction and combination hereinafter particularly described and claimed.

In the accompanying drawings forming part of this specification, Figure 1 is a pertures of invention; Fig. 2 is the blank of a cap for the .tops of the ladder standards; Fig. 3 is d. perspective view of the top of the ladder; Fig. 34 is a side elevation of the same; Fig. 5 is a perspective view of the upper end of 'oneof the rear standards of the ladder;

;Fig. 6, is a section on line wm of Fig. 5;

Fig. 7 is a section on line z z of Fig. 1; Fig. 8.is a blank 9f a brace or support for the ladder; Fig. 9 is an elevation of said brace; Fi 10 is a section on line y-y of F1 9; Fig. 11 s a perspective view of one en of one of the stdps and connected brace;

Fig. 12 is a perspective View of one end of one of the braces; Fig. 13 is;an inner view of one side of the ladder showing a locking device for the standards; Fig. 1 4 is a detail view of a portion of one ofthe steps carrying the lockin device; Fig. 15 is a perspective view of the lower end of one of the legs or standards, and ig. 16 is the blank of a base plate for the lower end of each leg. I

Referring to the drawings A. represents the front and B the rear legs or standards.

These standards are each of sheet metal.

tegral downwardly extending flanges" 3 which are shown supported'u on the an'ges 2 and upon the outer walls 0 the standards whereby the flanges 2 constitute a support for the steps. The steps are furtherfsup- Specification of Letters Patent. Application filed May 22,

Patented May 25, 1909.

1908. Serial No. 43%,270.

- ported or braced by means of the angle iron braces l) which are secured underneath the steps and to the inner sides of the step flanges 3, and extend downward into the openings of the standards and are secured to the inner sides of the standard flanges 2. One Wall of each brace thus bears against the underside of the step, and the wall of the brace at right angles therewith bears against the inner sides of the step flange and the standard flange thus constituting a particularly strong and bracing support for the steps.

E represents a cap to receive the upper ends of the standards. As shown the cap is of sheet metal bent to form inclined front and rear walls, the front standards being riveted in the cap and the rear standards having pivotal support l therein. The upper end of each standard is formed with a filling strip 5 to constitute a support for the pivot 4. The inclined rear wall (5 of the cap constitutes a stop to limit the swing of the standards A.

In order to lock the standards together I provide the clip 7 having hinge support 8 upon one of the steps and formed with an offset lip 9 to fit over the adjacent inner flange ot the rear standard.

In order to support a resilient facing 10, such as leatlici', upon the bottom of each standard I provide a plate 11 having upwardly turned points 12 secured to the flanges of the standard and with downwardly and inwardly turned flanges 13 projecting into the facing 10.

As will be seen the step braces,the clip 7, the tread support 11 and the cap are constructed to accord with the particular form of flanges'constructed of legs or standards. [do not in this application claim the broad idea of standards formed of sheet metal and provided with integral flanges extending out from the body of the standards to form openings to support the ste s as that is covered by my preceding app ication for Letters Patent filed November 23, 1.901, Serial No. 83,380.

I claim:

1. In combination a ladder comprising flanged steps, standards each formed of sheet metal with inwardly extending integral flanges constituting an opening to receive the ends of the steps and braces connecting said vided with flanges secured to the flanges of steps and standards, said braces being pro-.

said steps and the correspbnding flanges of metal wlth inwardly extending integral flanges constituting openings t9 receive the ends of the steps, and a chpj secured to the side of one of said steps and ons'tructed and arranged to interloek iwitli the adjacent flange of the rear standard.

Y [In testimon WhereOf I aflix my signatur in presence 0 two witnesses. v 4 HARVEY B. FULLER Witnesses:

H. S. JOHNSON, HATTIE SMITH.