US436460A - Suspended stair-scaffold - Google Patents

Suspended stair-scaffold Download PDF

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US436460A
US436460A US436460DA US436460A US 436460 A US436460 A US 436460A US 436460D A US436460D A US 436460DA US 436460 A US436460 A US 436460A
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scaffold
suspended
upright
arms
scaffolding
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R3/00—Arrangements of steps or ladders facilitating access to or on the vehicle, e.g. running-boards
    • B60R3/007—Removable steps or ladders, e.g. foldable
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/22—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by roofs or ceilings

Definitions

  • scaffolding In the construction of buildings scaffolding must be provided for lat-hers and plasterers who are working upon the under side of the stairway. On account of the well up which the stairs come it is more or less difficult to erect scaffolding, and it is necessary to provide supports in the walls of the building as well as upon the floors. This always involves more or less expense and delay in the construction of the scaffolding.
  • the object of my invention is to obviate the necessity of constructing special scaffolding, and I provide a suspended scaffold which is supported directly upon the treads of the stairway, all of which is hereinafter described.
  • Figure 1 is a side elevation of one section of my improved suspended scaifold; Fig. 2, aperspective view showing the application of my invention to a stairway.
  • the suspended scaffold consists of two such. sections, such as illustrated in Fig. 1.
  • Each section consists of an upright or standard A, having at the top a horizontal arm or support B, adjustable thereupon by means of the bolt Z) and bolt-holes b.
  • the portion B is braced by an adjustable brace B, as is perfectly clear.
  • the part B may also be provided with an extensible portion B both parts being provided with bolt-holes c for the reception of bolts 0, one of which may unite the brace B with the horizontal arm 13.
  • the lower end of the upright A has a corresponding horizontally-projecting arm D, which may be permanently attached thereto. It is provided with a brace D and an extensible portion D adjustable, as already described.
  • This apparatus may be made of iron of any suitable strength and character, and, as is obvious, is very cheap and strong.
  • Fig. 2 shows the application of my invention to a stairway.
  • One section is suspended by the supporting-arm B B and another sec tion is similarly suspend ed on one of the treads of the stairway lower down.
  • Scafioldingboards X are then thrown across the parts D D and a strong, simple, and perfectly safe scaffolding that may be' readily put in place and easily removed is the result.
  • That section of the scaffold which is suspended nearest the lower end of the stairway has the arms B and D closer together than the corresponding arms of the upper section, so that the arms D on the two sections may hold the scaffold-boards in the same horizontal plane.
  • a scaffolding for stairways the combination of an upright,a laterally-projecting supporting-arm near the upper end thereof and adapted to rest on the tread of the stairway, a brace secured to the arm extending upwardly therefrom and secured to the upright, and the lower scaffoldingsupporting arm secured to the upright below the upper arm.
  • a scaffolding for stairways the combination of an upright, supporting-arms projecting in the same direction from the upper and lower ends thereof and disconnected from each other at their outer ends, and braces connecting the arms to the upright.
  • a scaffolding for stairways the combination of a pair of uprights, arms projecting in the same direction from the upper and lower ends thereof, and scaffold-boards resting on the lower arms, the arms on one of the uprights being closer together than those on the other upright.

Description

(No Model.)
J. MGDERMOTT. SUSPENDED STAIR SOAFFOLD.
No. 436,460. Patented Sept. 16, 1890.
W/ NESSES.
UNITED STATES PATENT OFFICE.
JAMES MODERMOTT, OF BROOKLYN, NEW YORK.
SUSPENDED STAlR-SCAFFOLD.
SPECIFICATION forming part of Letters Patent No. 436,460, dated September 16, 1890.
Application filed May 22, 1890. Serial NO 352,786. (No model) To all whom it may concern: 1
Be it known that 1, JAMES MODERMOTT, a citizen of the United States, residingat Brooklyn, county of Kings, State of New York, have invented certain new and tiseful Improvements in Suspended Stair-Scaffolds, of which the following is a specification.
In the construction of buildings scaffolding must be provided for lat-hers and plasterers who are working upon the under side of the stairway. On account of the well up which the stairs come it is more or less difficult to erect scaffolding, and it is necessary to provide supports in the walls of the building as well as upon the floors. This always involves more or less expense and delay in the construction of the scaffolding.
The object of my invention is to obviate the necessity of constructing special scaffolding, and I provide a suspended scaffold which is supported directly upon the treads of the stairway, all of which is hereinafter described.
In the accompanying drawings, Figure 1 is a side elevation of one section of my improved suspended scaifold; Fig. 2, aperspective view showing the application of my invention to a stairway.
The suspended scaffold consists of two such. sections, such as illustrated in Fig. 1. Each section consists of an upright or standard A, having at the top a horizontal arm or support B, adjustable thereupon by means of the bolt Z) and bolt-holes b. The portion B is braced by an adjustable brace B, as is perfectly clear. The part B may also be provided with an extensible portion B both parts being provided with bolt-holes c for the reception of bolts 0, one of which may unite the brace B with the horizontal arm 13. The lower end of the upright A has a corresponding horizontally-projecting arm D, which may be permanently attached thereto. It is provided with a brace D and an extensible portion D adjustable, as already described. This apparatus may be made of iron of any suitable strength and character, and, as is obvious, is very cheap and strong.
Fig. 2 shows the application of my invention to a stairway. One section is suspended by the supporting-arm B B and another sec tion is similarly suspend ed on one of the treads of the stairway lower down. Scafioldingboards X are then thrown across the parts D D and a strong, simple, and perfectly safe scaffolding that may be' readily put in place and easily removed is the result. That section of the scaffold which is suspended nearest the lower end of the stairway has the arms B and D closer together than the corresponding arms of the upper section, so that the arms D on the two sections may hold the scaffold-boards in the same horizontal plane.
I claim as my invention- 1. In a scaffolding for stairways, the combination of an upright,a laterally-projecting supporting-arm near the upper end thereof and adapted to rest on the tread of the stairway, a brace secured to the arm extending upwardly therefrom and secured to the upright, and the lower scaffoldingsupporting arm secured to the upright below the upper arm.
2. In a scaffolding for stairways, the combination of an upright, supporting-arms projecting in the same direction from the upper and lower ends thereof and disconnected from each other at their outer ends, and braces connecting the arms to the upright.
23. In a scaffolding for stairways, the combination of a pair of uprights, arms projecting in the same direction from the upper and lower ends thereof, and scaffold-boards resting on the lower arms, the arms on one of the uprights being closer together than those on the other upright.
4. In a scaffolding for stairways, the combination of the upright, the arms projecting in the same direction from the upper and lower ends of the upright, braces connecting these arms with the upright, and the extension-pieces on the outer ends of the arms.
In testimony whereof I have hereunto subscribed my name.
JAMES MoDERMOTT.
Witnesses:
JAMES F. DOYLE,- DANIEL NOLAN.
US436460D Suspended stair-scaffold Expired - Lifetime US436460A (en)

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