US606763A

US606763A - Scaffold-support

Info

Publication number: US606763A
Authority: US
Publication date: 1898-07-05
Anticipated expiration: 1915-07-05

Description

No. 606,763. Patented m '5, I898.

, H. 0-. LUKENS. v

SCAFFOLD SUPPORT.

(No Modal.)

UNITED STATES PATENT OFFI E.

HARRY D. -LUI (ENS, OF SPRING CITY, PENNSYLVANIA;

SCAFFOLD-SUPPORT.

SPECIFICATION forming part Of Letters Patent N0. 606,763, dated July 5, 1898. A I Application filed September 23, 1897- Serial No. 652,708. No model.) I

To all whom it may cancer-n: Be it known that I, HARRY D. LUKENS, a citizen of the United States, and aresident of Spring City, county of Chester, and State of Pennsylvania, have invented certain new and useful Improvements in Scaifold-Supports, of which the following is a full, clear, and exact description, reference being had'to the accompanying drawings, forming part of this specification.

My invention relates to certain improvements in scaffold-supports of that class which may be attached to ladder-rungs and project therefrom in the form of a bracket for the support of a workman or for the reception of a scaffold-board supported at its opposite end on a similar bracket.

The principal object of my invention is to provide a device of this" class in the form of a folding tubular frame provided with extensible hooked bars for engagement with the rungs of the ladder.

In the accompanyingdrawings, Figure 1 is a perspective view of a scaIfold-support, illustratingthe same in position on a ladder. Fig. 2 is a similar view showing portions of the frame extended and hung to the rungs at the back of the ladder. Fig. 3 is a. sectional elevation of one of the endsof the tubular frame, as more specifically referred to hereinafter. Referring to the drawings, A represents the upper section of the frame, formed of two parallel side tubes a and two parallel end tubes 1), arranged to form a rectangular frame having its various corners connected by Ts c. Arranged within the side tubes a are adj ustable bars (1, which may be slid to and fro within the side tubes for the full length of the latter and at the outer ends are hooked, as at d, for engagement with the ladder-rung. In order to hold the sliding bars positively in any posit-ion to which they may be moved,

I provide in the forward Ts set-screws'e,

which are adapted to threaded orifices in the Ts and may be screwed down firmly on the sliding bars (Z.

The section 'B of the folding frame is of slightly greater width than the frame A. and

is formed of two side tubes g g, united'at their forward ends by Ts g: to a cross-bar h,

and having their rear ends flattened and provided with orifices for the passage of a pivotsimilar to that already described with reference to the bars d.

Between the various bars of the frame A is secured a platform m for the support of the workmen, or at times this platform may be omitted when it is simply intended to employ the bracket as a support for a scaffold-board.

' The relative width'and length of the sections are such that the smaller section A may be folded within the larger section for convenience in storage and shipping.

Having thus described my invention, what through the Ts g of the frame in a manner I claim, and desire to secure by Letters Patent, is

1. The combination in a scafiold-support, of the tubular frames arranged to fold one within the other, extensible hooked bars adapted to slide'within the side tubes of each of the frames, and means for confining said bars in position, substantially as specified.

2. In combination, two tubular frames arranged to fold together, hooked bars guided within the side tubesof each frame, and setscrews for confining the bars in the adjusted position.

3. The combination of the frame A comprising side and end tubes or and 1) respectively, extensible bars 01, carried by the side tubes and having hooked ends for engagement with laddersrungs, a frame B, comprising side and end tubes 9, h, respectively, extensible bars Z, carriedby the side tubes 9, and havin g hooked ends for engagement with the ladder-rung,set-screws for confining the hooked bars in their respective tubes, and a pivot-bolt '5, connecting said frames to each other, substantially as specified.

In testimony whereof I hereunto set my hand this 16th day of September, A. D. 1897.

HARRY D. LUKENS.

Witnesses:

' A. G. SHmLIoH,

J OSEPH L. CARNEY.