US745094A

US745094A - Scaffold.

Info

Publication number: US745094A
Application number: US16291403A
Authority: US
Inventors: Clarence B Cummons
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-06-24
Filing date: 1903-06-24
Publication date: 1903-11-24
Anticipated expiration: 1920-11-24

Description

No. 745,094. PATENTED NOV. 24, 1903.

G. B. GUMMONS. SGAFPOLD.

APPLICATION FILED JUNE 24, 1903; no MODEL. 2 SHEETS-SHEET 1.

l vimwago PATENTED NOV. 24, 1903.

G. B. GUMMONS.

SGAFFOLD.

APPLICATION FILED JUNE 24, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

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Patented November 24, 190 3.

CLARENCE B. CUMMONS, OF CHARLESTON, MISSOURI.

SCAF FOLD.

SPECIFIGATION forming part of Letters Patent No. 745,094, dated November 24, 1903.

Application filed June 24, 1908. Serial No. 162,914. (No model.)

To all/Z whom it may concern:

l leit known that l, CLARENCE B. CUMMONS, a citizen of the United States, residing at Charleston, in the county of Mississippi, State of Missouri, have invented certain new and useful Improvements in Scaffolds; and I do hereby 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.

This invention relates to scaffolds; and it has for its object to provide a scaffold which may be used in connection with telegraphpoles, trees, or the corners of houses where the construction of the house will permit.

A further object of the invention is to provide a scaffold that may be readily applied and removed, which may be easily adjusted, which will be simple and cheap.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a top plan View of the scaffold, showing it imposition upon a tree, the latter being illustrated in transverse section. Fig. 2 is a side elevation. Fig. is a front elevation.

Referring now to the drawings, the present scaffold comprises a bracket including an angular member consisting of the upright 5, from the upper end of which extends horizontally the arm 6, having its free end curved slightly upwardly, as shown at 7. Abrace 8 connects the lower end of the upright 5 with the free end portion of the arm 6, the rivet or bolt 8, which connects the brace with the upright, serving to connect to the lower end of the upright the arc-shaped rest-plate 9, which is disposed transversely of the upright. The rivet or bolt that connects the brace with the arm 6 serves also to connect the transverse bar 10 upon the upper face of the arm, the ends of this transverse bar being curved slightly upwardly, as shown at 11 and 12. The outer end portion of the arm 6, together with the transverse bar, forms a support for a seat 13.

Disposed transversely of the inner end por tion of the arm 6 is a yoke-plate 15, the ends of which extend upwardly and have pulleywheels 16 attached to their extremities, the casings of these pulley-wheels being held ri idly. To hold the yoke-plate to the arm 6, a clamping-plate 18 is bolted to the under side thereof and passes under the arm, the bolts 18 for this clamping-plate passing also through a second plate 19, which is disposed above the yoke-plate and between which and the yoke plate are disposed the stems of

hooks

19 and 20, which are pivoted upon the outermost clamping-bolts. The bills of the hooks lie beyond the arc-shaped rest-plate, and their eX- tremities project normally forwardly, so that the hooks may be separated and engaged part way around atree or pole to which the scafiold is to be attached, the rest-plate at such time lying against the tree or pole below the hooks. Owing to the shape of the hooks, the strain to which they are subjected when a load is placed upon the seat serves to sink the hooks into the tree or pole, so that they are held more firmly.

The hooks are held normally and yieldably in close relation by means of a helical spring 21, which is connected to the hooks at points between their bills and their pivots. The stems of the hooks are continued beyond their pivots in the form of finger -pieces or handles 22. These finger-pieces or handles may be grasped and pressed toward each other,which movement serves to separate the hooks, so thatthe scaffold may be withdrawn from the tree or pole with which it may be engaged. The manner of attaching and detaching the scaffold will be readily understood and its utility will be appreciated. Through the pulleys at the end of the yoke-plate are passed cords 23, which hang down from the scaffold. These cords are used in hoisting any article or material that may be needed by the person at work upon the scaffold.

It will be noted that the present scaffold may be. attached at various heights with ease and may be as readily detached, it being understood that in practice modifications ofthe specific construction shown maybe made and that any suitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

What is claimed is 1. A scaffold comprising a bracket consisting of an upright, an arm extending longitudinally therefrom and a brace connecting the lower end of the upright to the free end portion of the arm, an arc-shaped rest-plate hooks being extended beyond their pivots in the form of handles.

2. A scaffold comprising a bracket consisting of an upright, an arm extending horizontally therefrom, and a brace connecting the lower end of the upright to the free end portion of the arm, an arc-shaped rest-plate connected to the lower end of the upright and disposed transversely thereto, a bar connected to the outer end portion of the said arm, and

disposed transversely thereto, said bar having its ends curved slightly upward, a yokeplate disposed transversely of the inner end portion of the said arm, the ends of said yokeplate being" bent upward, pulley-wheels attached to ends of the'said yoke-plate, cords passing around the pulley-wheels, said cords being adapted for hoisting, a clamping-plate bolted to the under side of the yoke-plate and adapted to pass under the arm, a second plate disposed above the yoke-plate, hooks having stems pivoted between the last-named plate and the yoke-plate, and a spring connected to the hooks for the purpose of holding the said hooks yieldably in closed relation.

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

CLARENCE B. cUMMoNs. Witnesses:

E. J. DEAL, PAUL A. SOHUMAK.