US485900A

US485900A - August otto tannenberg

Info

Publication number: US485900A
Authority: US
Publication date: 1892-11-08
Anticipated expiration: 1909-11-08

Description

(No Model.

A. 0. TANNENBERG. COMBINED SIDE AND CENTER BRAGE ATTACHMENT FOR STEP LADDERS.

No. 485,900. Patented Nov. 8, 1892.

' INVENTOR flu ll-SZ a 174722362236 g Mi ATTORNEY WITNESSES.-

UNrrnD STATES PATENT Orrrcn.

AUGUST OTTO TANNENBERG, OF NEW ORLEANS, LOUISIANA, ASSIGNOR TO TVILLTAM I-I. BOFINGER, OF SAME PLACE.

COMBINED SIDE AND CENTER BRACE ATTACHMENT FOR STEP-LADDERS.

SPECIFICATION forming part of Letters Patent No. 485,900, dated November 8, 1892.

Application filed April 11, 1892. Serial No. 128,698. [No model.)

To all whom it may concern:

Be it known that 1, AUGUST OTTo TANNEN- BERG, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, haveinvented certain new and useful Improvements in a Combined Side and Center Brace Attachment for a Step-Ladder; and I do 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.

My invention relates to an improvement in a combined side and center brace attachment for a step-ladder, and its novelty will be fully understood from the following description and claims, when taken in connection with the annexed drawings; and the objects of my invention are to provide braces for a stepladder that will enable same to be used Without risk of injuring body or limbs of a person, and'at same time provide a steady support for the step-ladder. I attain these objects by the mechanism illustrated in the accompanying drawings, in Which Figure l is a front view. Fig. 2 is a side View. Fig. 3 is a detail front view. Fig. 4. is a detail side view.

Similar letters refer to similar parts throughout the several views.

In the drawings, A refers to the front portion of a step-ladder; B, the rear part of a stepladder, which is connected to the front part A by links 17, as shown.

C are lateral braces attached on each side of A by means of suitable hinges, and when the step-ladder is in use are drawn out from the sides of the part A, as seen in the dotted lines in Fig. 1 and as shown in Fig. 2, thus giving an increased base for step-ladder.

D are metal braces, which are pivoted between plate E and hinge F, and are provided with slots for engaging a lug or projection on sides of rear portion of step-ladder B, thus bracing the rear part of step-ladder and preventing it from collapsing or closing when in use. By the provision of the links I), in conjunction with the front and rear parts A and B and the slotted braces D, it will be perceived that the part B may readily be folded against the part A, the said part B being pre viously disconnected from the brace D by simply lifting the braces up and out of engagement with the lugs.

G are metal arms attached to sides of Aby 5 5 means of pivots or other means and are provided with openings or holes a, as shown in Fig. 3, for engaging the headed lugs 01 on the braces O, and will enable said braces to be retained in a fixed position until disengaged. These holes a are provided with the offsets c, as shown, to receive the shank of the headed lugs 01 and prevent a casual disconnection of the arms from the lugs of the braces. At a point on the part A, designated H, I place two eyes, which are secured in the usual manner and between which the eye K on brace O rests when the step-ladder is folded or the braces are not in use, and by simply inserting a piece of wire or nail through eyes H and K a secure fastening is made. The hinges F of braces C are held in position by means of a pivot rigidly attached to plate E, said pivot also engaging arms D, which rest on plate E.

In practice the step-ladder is used in the same manner as usual, except when in position, when the braces O are drawn out and engage the arms G in the manner shown in Fig. 3, thus giving an increase of base and steadiness to a step-ladder, while the braces D engage the rear portion of a step-ladder.

A striking advantage of my invention is its economical construction and security from injury oifered in use of same.

Having described my invention and. the manner in which the same is or may be carried into effect, I would say in conclusion that I do not limit myself to the precise details herein described, as the same may be varied to some extent; but

TVhat I claim, and desire to secure by Letters Patent, is

1. In a step-ladder, the combination, with the front part A, the rear part B, having lateral studs, and the links b, connecting the rear part to the front part, of the braces D, pivotally connected to the front part A and having notches or slots in their lower edges at intermediate points in their length to ening the holes a at intermediate points in its gage the? lateral lugs of the part B, substanlength provided with the offsets c, substantially as and for the purpose set forth. tially as and for the purpose set forth.

2. In a step-ladder, the combination, with In testimony whereofIaffix my signature in 5 the iront part A and the rear part B, connected presence of two witnesses.

to t e front part, of the lateral braces O, havv r ing their upper ends flexibly connected to I AUGUST OT PO TANNENBERG' the sides of the front A and also having the Witnesses: lateral headed lugs d and the arms G, pivot- HELMUTH HOLTZ,

IO ally connected to the front part A and hav- PERCY D. PARKS.