US959008A - Scaffold-supporting means. - Google Patents

Description

WIInEses E. 'H. HENDERSON.

SGAFFOLD SUPPORTING MEANS.

APPLICATION FILED 311N219, 1909.

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AITEI'nBHE E. H. HENDERSON. SGAFFOLD SUPPORTING MEANS.

APPLICATION FILED 11711319, 1909.

Patented May 24,1910.

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WIIDESEES- v UNITED STATES PATENT onnrcn.

ELIASJL HENDERSON, OF CHICAGO, ILLINOIS.

To all whom it may concern:

Be it known that I, ELIAs I-I. HENDERSON,

'a citizen of the United States, residing at vmeans for su porting scaffolds used in connection with the, construction of buildings and their repair. Scaffolds for this purpose are preferably of the swinging type supported by cables from Outriggers temporarily secured to the upper part of the building. p

i It has been the practice'in the past to associate hoisting means with the cables at the Outriggers, and in some cases it has been proposed to use such hoisting means n con- .nection with thecables on the scaffold to Y the building supports at its upper portion adjust the height as required in connection with the work.

My invention relates to an im roved form of hoisting mechanism carried y the scaffold for securing the same to the cables,

the upper ends of which are connected to Outriggers, generally temporary in character, secured to'the upper portion of the building.

It is an object of my invention to construct such a hoisting mechanism in such a manner that it results in a maximum degree of security and aminimum cost of production.

The several drawings illustrating my invention are as follows:

Figure :1 is a perspective .view of the framework of a building showing my scaffold suppcirting means in place upon a scaffold. g 2 is an enlarged side view of a portion of" the scaffold shown in Fig. 1. Fig. 3 is a top view of a modified form of scaffold narrower than the scaffold shown in Fig. 1. Fig. 4 isla side View of the scaffold shown in Fig. 3. Fig. 5 is a sideyiew of the hoisting mechanism used in connection with each supporting cable. Fig. 6 is v a face vlew of the mechanism shown in Fig. 5."

Similar numerals refer to throughout the several views.

As shown in Fig. .1, the framework 1 of similar parts -Specification of Letters latent.

much narrower than [shown in Fig. 1. .hoisting mechanism may be used at'each' end of the scaffold 21, as shown in Figs. 3

scArroLn-sr rron'rme MEANS.

Patented May 24, 1910.

Application filed June 19, 1909. Serial No. 503,053.

a plurality of Outriggers 2, from the over hanging portions of which cables 3 depend. Each of these cables 3 is connected at its lower end to a hoisting mechanism 4, which together serve to support the scaffold 5.

As indicated in Fig. 2, theframe 6 of each hoisting mechanism is so formed as to pass around the end of cross piece 7 used to support the platform 8 of the scaffold 5.

The detail construction of each hoisting mechanism is more clearly shown by refer ence to Figs. 5 and 6. Each of such. mechanisms consists of a frame 6, preferably of bar iron, bent into the shape of a U, and when so formed adapted to pass aroundand support one end of one of the cross pieces 7 referred to above. The upwardly extending ends of the frame (3 have extending be tween them a round bar 9 which forms the support for a drum 10 used to receive the cable 3, the end of which is secured to the drum by means of a cable clamp 11'. The drum 10 carries at its right-hand end, as shown in Fig. 5, a gear 12 which meshes with a pinion 13 secured to the shaft 14, which is revolubly supported in the upwardly extending ends of the frame 6. The shaft 14 is squared at its endsto be engaged by cranks 15 at either or both of such ends,

M as desired, for the purpose of rotating the shaft 14 and the drum 10. The upper ends of the frame 6 are held in proper relative position by means of a bolt-1S, upon which are secured collars 17 to properly space the ends of the frame 6. The bolt 16 rotatably supports a locking pawl 18 adapted to engage the gear 12 carriedby the drum 10 for the purpose of holding such drum positively in any position to which it may be moved by the operation of the crank 15. A second pawl 19 is indicated as supported by a rod 20 extending between the side members of the frame (3, which pawl, as indicated at 19*, is adapted to be engaged by the foot of the person operating the drum to remove such carried by the drum.

The hoisting mechanism just described is also adapted for use in connection with comparatively small scaffolds which are the style of scaffold In this connection, one

and 4. In connection with scaffolds of thi's type, it is generally desirable to locate a v supporting timber 22 longitudinally of the scairold 21 on'i-ts under side and substantially under the middle of 'the 'scafliold.

This timber has placed upon it cross pieces 23,. uponwhich the floor-24 of the scaffold mechanisms infthis modification are built to "pass around the ends of the timber 22 to su 'ort the scaflold- 1'0, 7 construction secures the greatest vpossible I around the rom the above itwill beseen that'my amount of security, since the frame 6 passes required to secure the hoisting mechanism to the scaffold. Furthermore, the construction is made very simple,

and themachines ,can be cheaply made on account of the small number of parts, and further on account of the single bar constituting the framework of the machlne serving also as the bearings and 7 bearing supports for, the hoisting mech- I anism'.

tion of cross particular embodimentherein described, I do not, however, limit myself to this construction, but desire to claim any equivalent that will suggest itself to those skilled iirthe art.

I claim: 1. A- scaffold consisting in the combina- I supporting beams of the scaflold' 1 in suchaway that no auxiliaryuneans are 'and gearing between- While I have shown my invention in the beams, floor pieces extending between such'beams, and a hoisting devlce assoclated wlth each end of each beam, each hoisting device consisting of a continuous U shaped metal barextendin around the under side of and upward roni the asse ciated beam, and a hoistingdrum rotatably supportedb the side members of such bar.

2. A sea old consisting in the combination of cross beams,1fioor pieces extending between such beams, and a hoisting device associated with each end of eachbeam, each hoisting device consisting of a metal bar formed around and extending upward on both sides of the associated beam, a drum supported by the upwardly extending ends of the bar in bearings formed in such bar,v

said cross beam, a drum rotatably sup ported between the upwardly extending sidemembers of each of said U-shaped bars,

and means for controlling the rotation of said drum.

In witness whereof, I hereunto subscribe my name this 16th day of June, 1909.

ELIAS H. HENDERSON.

.-Witnesses:

ALBERT O. BELL, :R-OBERT F. BRACKE.

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