US853161A - Hanging staging-hoist. - Google Patents

Description

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No. 853,161. PATENTED MAY '7, 1907. H. O. CLARKE & A. G. ROSS.

HANGING STAGING HOIST. APPLIOATIOH FILED 00116. 190e.

'UNITED s'TATns riiTni T onirica.

HOBART O. CLARKE, OF PITTSBURG, AND ARTHUR G. ROSS, OF WILKINS- BURG, PENN SYLVANIA.

HANGING STAGING-HOIST.

Specification of Letters Patent.

'r'atented May 7, 1907.

Application filed October 16, 1906. Serial No. 339,168.

To all 'wh/1111, it may cm1/cern:

Be it. known that we, HOBART O. CLARKE, a resident of Pittsburg, in the county of Alleglieny and State of Pennsylvania, and AR- TnUn- G. Ross, a'resident of /Vilkinsburg, in the county of Allegheny and State of-Penn- Sylvania, both citizens of 'the United States, have invented a new and Improved Hanging Staging-l-Ioist, of which the following is a ull, clear, and exact description.

'l` his invention is an improved staging hoist adapted to be suspended at the side of a building and used by brick masons, painters and others during the building operation.

'ilie primary object of the invention is the production of a device of this character, capa ble of easy, vertical adjustment, especially avoiding complicated and expensive mechanism or such asvwould interfere with the free move-ment of the workman on the stage or latform.

With this and other objects in view, one embodiment of the invention consists of a plurality of depending bars supported by suitable outriggers, the bars having a number of apertures to be engaged by pins or the like to sustain the stage therefrom. A drum adjustably carried by each of the bars is operable by a lever and ratchet mechanism to elevate or lower the stage, through an intermediate flexible connection, to the required elevation.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the igures.

Figure 1 is a perspective view of a plurality of our improved staging hoists as applied to the side of an unfinished building, and Fig. 2 is aside elevation of one hoist, partly in section at one side.

1 indicates an overhanging beam or outrigger, which is ordinarily supported from the framework of a building during the building operation, as shown in Fig. 1. Several of these beams are rovided, which are arranged in pairs in slight y separated relation and are connected together by transverse bolts or other suitable devices. Between each pair of outriggers pass two depending bars 2, which are adj ustably supported therefrom by bolts 3 passing through any one of a number of equidistant apertures 4 arranged on the longitudinal center of each bar.4 Guided on each bar 2 below the Outrigger 1 are crossbeams 5 arranged in pairs, embracing a pair of bars and connected together by bolts 6.

Supported on any number of pairs of crossbeams 5, preferably 3, is a stage or platform 7, having a vertical back-board S positioned against the outer bars 2 for preventing material'from dropping from the platform into the street. The platform of each hoist is sustained in adjusted position from the bars 2 by means of bolts 9 passing through the apertures 4 of the bars at the same elevation and below the crossbeams 5, the latter resting on the bolts when the bolts are in' position.

For adjusting the vertical height of the stave or platform 7 is provided a cross-shaft 10 or each pair of bars, journaled near each end in brackets 11 and 11a, said brackets being adjustably connected to the bars by hooks 12 passing through the apertures 4 at the same elevation. Each shaft 10 has iixed to it adjacent to the bracket 11a, a ratchet-wheel 13, which is normally engaged by a gravity pawl 14 pivoted on a stud or )in carried by said bracket. Each ratchet-w eel is further engaged when in operation, by a -pawl 15 ivoted between the forked end of an operating lever 16, the forked end of said lever being journaled on the shaft l() at each side of the ratchet-wheel 13. 1t is apparent from this construction that on oscillating the-levers 16 the pawls 15 will engage the ratchetwheels and turn the shafts 10, which will be prevented from turning in the opposite direction by the pawls 14.

Fixed to the outer ends of the shafts 10 are drums 17 having wound thereabout ropes or other flexible connections 18, which are provided with loops 19 at their free ends, passing over the ends of the cross-beams 5, each rope embracing a pair of said beams. The drums 17 are preferably spline'd to the shafts 10 in order that they may be longitudinally adjusted thereon to decrease or increase the width of the stage in accordance with the character of the work in which it is used.

In the operation of the hoist, the levers 16 are simultaneously oscillated to adjust the stage o r platform at the required elevation, after which the bolts 9 are passed through IOO apertures in the bars adjacent to the under face of the cross-beams 5. The levers 16 are then moved in order that the pawls 14 may be released to lower the platform so that the cross-beams may rest on the bolts.

l/Ve have described the preferred forni of the invention in order that the construction and operation might be fully understood. We, however, regard the precise construction as not material and consider the invention limited by the scope of thel annexed claims only.

Having thus described our invention we claim as new and desire to secure by Letters Patent:

1. In a staging hoist, in combination, depending bars adapted to be supported from over-hanging beams or outriggers, a platform guided on said bars and adapted to be sustained therefrom, means carried by the bars operable to elevate the platform, and means providing for the vertical adjustment of the elevating means.

2. In a staging hoist, in combination, depending bars supported from suitable outri gers, a platform guided on said bars and a apted to be sustained therefrom, and means carried by the bars operable to elevate the platform.

3. In a staging hoist, in combination, outriggers, a platform, bars depending from the outriggers and arranged at opposite sides of the platform, means for guiding the platform on the bars, means for supporting the platform on the bars, and independent means carried by the bars for moving the platform in a vertical direction.

4. In a staging hoist, in combination, a platform, supports, a plurality of bars depending from said supports and arranged at each side of the platform on which the latter is guided, a cross shaft supported from a pair of said bars, a drum fixed to each end of the cross shaft, flexible connections between the drum and platform, and means for revolving the cross shaft for adjusting the vertical height of the platform.

In a staging hoist, in combination, outriggers, a plurality of pairs of bars dependin from the outriggers, a stage guided on sai bars, a shaft journaled in bearings carried b v each of said bars, a drum fixed to each shaft, flexible lines connecting the drums with the stage, and means for rotating said shafts to adjust the vertical height of the stage.

6. In a staging hoist, in combination, supports, perforated bars depending from said supports, a stage guided on said bars below the supports, a cross shaft journaled in bearings on each pair of bars, means for adjustably suspending the bearings from the apertures in `-the bars, drums fixed to said crossshafts, and means connecting the drums with the stage for adjusting its vertical height on the bars.

7. In a staging hoist, in combination, supports, a plurality of bars depending from said supports, each bar being provided with a series of apertures, a stage guided en said bars, means adapted to engage certain of said apertures for sustaining the stage from the bars, and means in engagement ,with other of said apertures for vertically adjusting the stage.

S. In a staging hoist, in combination, supports, a pair of bars depending from said supports, a pair of cross-beams embracing and guided on said bars, a platform carried on said cross-beams, a shaft having a drum at each end carried by the bars, and exible connections attached to the drums and looped about the cross-beams.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

' HOBART O. CLARKE.

ARTHUR G. ROSS.

Witnesses H. H. LovETT, A. H. VVINANS.

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