US607805A

US607805A - Johann sladek

Info

Publication number: US607805A
Authority: US
Publication date: 1898-07-19
Anticipated expiration: 1915-07-19

Description

No. 607,805. Patented July I9, |898.

. J. SLADEK.

SCAFFOLD.

(Application led Sept. 29, 1897.)

(N0 Model.)

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JOHANN SLADEK, OF NEW YORK, N. Y., ASIGNOR OF ONE-HALF TO GEORGE LADEWIOH, OF SAME PLACE.

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SPECIFICATION'forming part of Letters Patent No. 607,805, dated July 19, 1898. Application led September 29, 1897. Serial No. 653,481. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOHANN SLADEK, a citizen of the United States, residing in the city, county, and State of New York,have invented certain new and useful Improve ments 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.

My invention relates to painters scaffolds; and its novelty consists in `the construction and adaptation of the parts, as will be more specifically hereinafter pointed out.

Referring to the accompanying drawings, Figure l is a front elevation of the scaffold suspended on the exterior of a building. Fig. 2 is an end view of the same, and Fig. 3 is a detailed View of the brake employed when lowering the device.

In the drawings., A is the framework which supports the platform. This frame and the platform may be made of any suitable material; but I show them as made of wood, which is most commonly employed for that purpose. The side bars of the frame rest in stirrups B, secured to or made integral with the suspension-frames O and C', which are centrally suspended from the beam E, placed upon the roof of the building, by the blocks and tackles D and D.

The structure is kept from touching the side of the house by two arms F and F', each of which is adjustably secured to the platform A by means of clamps, as G, and each of which is provided with means, as the anti friction-rollers F, for modifying the nature and extent of thecontact of the arms with the building.

Side rails H and H are adjustably secured to the frames O and C by any suitable meansfor instance, hinged hasps or brackets I, as shown. In suitable bearings on each of the suspension-frames O and O is mounted a windlass J, upon which is wound the rope of the block and tackle. On the outer end of the shaft of the windlass is mounted a beveled gear-wheel K, adapted to mesh with a beveled pinion L', mounted on a cross-shaft L and actuated by a crank Each windlass is also provided with a pawlNand ratchet N. A drum O is mounted on the windlass at its inner end, and a strap-brake P is passed around the same and terminates in a lever Q, fulcrumed on the suspension-frame O, thereby controlling the motion of the device inv lowering it.

The operation of my device will be readily seen from the foregoing description of its parts. The great advantage derived from its use is freedom from the dangerous tendency to tip y so common in scaffolds of this'class. The double pulley always secures a lift from the center, and as each windlass is wound from the inner side of the suspension-frame and one winds to the left and the other to the right the lateral pull of the rope on one windlass is balanced by the equal pull of the rope on the other windlass in the opposite direction. Placing the operating-crank of the Windlass on the inner side of the suspensionframe also avoids the necessity for stepping around its outer edge or leaning over the edge of the platform to turn the windlass.

Having described my invention, what I claim as new isl.v The herein-described scaffold, comprising a platform, suspension-frames adapted to support said platform, stirrups projecting from said frames on line with said platform, side pieces resting on said stirrups, side rails removably secured to said suspension-frames above said side pieces, rearwardly-projecting arms having rollers mounted in their outer free ends, clamps for adj ustably securing the inner ends of said arms to said-platform, a windlass carried by each of said suspensionframes, and means for regulating the speed of rotation of said windlasses when said scaffold is being lowered, substantially as set forth.

. 2. The herein-described scaffold compris'- ing a platform, suspension-frames adapted to support said platform, stirrups projecting' Windlass and adapted to revolve therewith, a' specification in the presence of two Snbsoribstrap secured at one end to said suspension-` ing Witnesses. frame and encircling said drum, a lever piv- Y 1 oted to said frame and connected to the free JOHANN SLADLK 5 end of said strap, and means for rotating said W'itnesses:

GEORGE LADEWIOH,

Windlass, substantially as set forth.

Intestimony whereof I have signed this B. M. SCOTT.