US388924A - Combined scaffold and elevator - Google Patents

Description

(No Model.) 2 Sheets-S11eet 1. R. H. SMITH.

GOMBINED SGAFPOLD AND ELEVATOR.

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R. E. SMITH.

COMBINED SGAFFOLD AND ELEVATOR.

No. 388,924. Patented Sept. 4, 1888.

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ROGER H. SMITH, OF MUIR, KENTUCKY.

COMBINED SCAFFOLD AND ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 388,924, dated September 4, 1888. Application filed July 11,1887. Serial No.244,034. (No modeLl To aZZ whom, it may concern:

Be it known that I, ROGER. H. SMITH, of Muir, in the county of Fayette and State of Kentucky, have invented a new and useful Improvement in Combined Scaffold and Ele vator, which improvement is fully set forth in the following specification and accompanying drawings, in which- Figure I is a perspective elevation of my combined scaffold and elevator. Fig. II is a side elevation of the same, placed at the side of a building; Fig. Ill, an enlarged detail view of the PlELlfOllllQSllllB and eccentric for holding the same, and Fig. IV a perspective view of the lower end or foot of the brace.

The object of my invention is to provide a scaffold which can be used for building purposes, constructed and combined as will be hereinafter explained and claimed, so as to be complete in itself in the general detail of its operation, and also adjustable in its character to provide for any unevenness of ground, and to contain thereon an elevating-platform which can be raised or lowered at will, all of which will now beset forth in detail.

The main frame of the scaffold or elevator is composed of two main pieces, A A, united at their upper ends, and having theirlower ends separated and provided with wheels B. One of these pieces, A, has an extensible liinb,O, at its lower end, so thatit may he lengthened or shortened to provide for any unevenness in the surface of the ground when it is adjusted at the side of a building. These pieces A A are preferably severed in the middle and hinged together, as shown at D D, for conveniencein folding when about to be transported from place to place. A number of cross bars or pieces, E, are placed across these pieces A A, and secured thereto at the ends by means of holts,screws, or otherwise on the front side,and extending vertically on the face of these crosspieces E are two parallel bars, F. These are also severed centrally at G, and may or may not be provided with hinges. The outer edges of these parallel bars F are provided with grooves H.

The platform frame is composed of two pieces, I I, which are provided with tongues on their inner sides, which tongues slide in the grooves H of the parallel bars F. The crossbar J is in two parts, which are connected by a slotted plate, j, and is adapted by means of a set-screw to be lengthened or shortened to regulate the adjustment of the cams M in their engagement with the upright barsF. Thus this crossbar will hold the two pieces I I together on the outside of the parallel pieces F, so that they will slide up and down on said bars.

K represents a horizontal piece attached to the bars I of the sliding frame, and to this piece K and the sliding bars I brackets L are secured. upon which the platform or scaffold rests. The upper cross-piece, 8", which holds together the sliding bars I, carries eccentrics M. (Shown more fully in Fig. 3 The long arms of the eccentrics M serve as wcights,and on the lowerside of each is astaple, O, to which a rope, P, is attached. The rope P is not connect-ed below, but hangs free, so that it may be accessible from the scaffold or on the ground. The rope passes through loopsQ, on the cross-bar J, and in operatiomwhcn it is desired to check the downward movement of 5 the sliding platform-frame, the rope P is re leased, which causes the weights to move the eccentrics M against the bar F, and thus check the downward movement.

The rear side of the frame is provided with a brace, which is composed of two arms, R It, attached at their upper ends to the posts or bars A A near their upper ends. The lower ends of these bars are attached to a slotted extension, S, of a shoe, R, a hlllllllb'SClQW, S, being employed to adjust the shoe up or down, as may be required. The shoe R has a hole, T,at the toe,through which the fasteningstake is driven, and on the rear side are two ears,U, between which is pivoted a slotted arm, U. The lower ends of the supplementary arms V are adj ustably secured to the slotted arm U, the upper ends of said arms V being hinged to the posts A A midway between the top and bottom, the object of these double bars being to hold the posts A A rigid from top to bottom, so as to prevent any sagging or swaying when weight is placed on the platform or scaffold.

It will be observed that the scaffold is not to be attached to the building, but that the front part thereof is to be placed as nearly vertical as possible, facing the building, and the scaffold is to be moved up and down on the parallel bars F F without coming in contact with thebuilding or the structure. The wheels on the lower end are designed to enable the operator to move the scaffold along the sideof the building, and by means of the adjustable piece 0 on the main post A and the adjustable character of the braces on the rear side itis adapted for any unevenness ofground asit is moved from place to place and adjusted in position.

To still further increase its value for building purposes, the apex ofthe posts A A is provided with a pulley-block, W, and the base cross-piece E is equipped with a Windlass, X, and acrank, by means of which and the connecting-rope (shown in dotted lines) thescaffold may be raised or lowered. The pulley-block may be placed on the forward side of the post, as shown in Fig. I, or on the rear side, as shown in Fig. II, so as to facilitate the elevating of material while in the process of building. There is also provided a base-block, Y, which may be secured to the ground at a point be tween or near the base of the parallel bars F, and this block is provided with swiveled ears Z, to receive the lower end ofa derrick post or frame, Y, which, operating in connection with the pulley and tackle referred to, enables the user to convert the frame into a derrick when not used as an elevator or scaffold. Centrally ends, one posthaving an extensible limb thereon, both being provided with wheels and centrally hinged, in combination with an adjustable brace composed of two frames separably adjustable to a common foot, substantially as herein set forth.

2. The A-shaped frame centrally severed and hinged, having on its forward side two vertical parallel bars forming a guideway, in combination with the frame sliding on the parallel bars, said frame having an eccentric wheel for holding same in position, and also bars carrying brackets for the platform, substantially as herein set fort-h.

3. The A-shapedframehavingonitsforward side parallel bars forming a guideway, and a platform for the scaffoldframe sliding on said parallel bars, in combination with the brace at the rear and the shoe having a slotted extension, and a bolt passing through said slot, whereby the brace is adjustably attached to the shoe and also held in any given place.

4. In combination with the A-shaped frame; made as described, the arms R at the rear adjustable in the slotted extension secured to the shoe, and the supplementary arms adjustably secured in the slotted arms U, substantially as described.

5. Thecombination,withthemain framehaving the bars I grooved on their outer sides,of the platform-frame I, provided with tongues on the inner sides of the grooves, the crossbar J, made in two parts, the slotted plate, and the cams M,operated as described,substantiall y as and for the purposes described.

' In testimony that I claim the foregoing I have hereunto set my hand, this 5th day of July, 1887, in the presence of witnesses.

. ROGER H. SMITH.

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