US1035702A - Scaffold-supporting means. - Google Patents

Description

E. H. HENDERSON.

SOAFFOLD SUPPORTING MEANS.

APPLICATION IILBD MAR. 12, 1910.

1 ,O35,702, Patented Aug. 13, 1912.

2 BHEBTB-BHEET 1.

MUTIIEHS @WW EH E. H. HENDERSON.

SCAFFOLD SUPPORTING MEANS.

APPLICATION FILED MAR. 12, 1910.

1,035,702, Patented Aug.13,1912.

2 SHEETS-SHEET 2.

Wfinesses: hventur' Elias H. HendersunI 1 15 I $MK W Q M? ported in place at the side Fig. 2 is a side view of the scaffold shown in UNITED STATES PATENT OFFICE.

ELIAS H. HENDERSON, OF CHICAGO, ILLINOIS, AS SIGNQR, BY MESNE ASSIGNMENTS, TO HENDERSON SCAFFOLD HOIST COMPANY, OF CHICAGO, ILLINOIS, A CORPORA- TION OF ILLINOIS.

SGAFFOLD-SUPPORTING MEANS.

Specification of Letters Patent.

Application filed March 12, 1910.

Patented Aug. 13,1912 Serial N0. 548,952. I

vof Illinois, have invented certain new and useful Improvements in ScaffohLSupporting Means, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My inventlon relates to an improved form of scaffold supporting mechanism by which the supportin means is also adapted to move the sea old any desired height on a building. 1

My invention consists essentially of an improved form of Windlass construction in which the number of operating parts is reduced to a minimum and which -is so made as to receive scaffold supporting members without the use of fastening devices such members being lald in place in the frames of the Windlass and held' in proper position thereon by the combined weight of such members and the scaffold supported thereby.

The several drawings illustrating my invention are as follows:

Figure 1 is an end view of a scaffold supof a building.

Fig. 1. Fig. 3 is a detail sectional view of the drum of one of the windlasses showing the construction of the operating lever. Fig. 4 is a view similar to Fig. 3 showing a modified form of operating lever. Fig. 5 is a side view of a modified form of scaffold known'as a painters scaffold. Fig. 6, is a sectional view of the scaffold shown in Fig.

5 taken along the line 6-6.

Similar numeralsrefer to similar parts throughout the several views.

4 As shown in Fig. 1, the scaffold consists of a plurality of supporting members 1 upon which the floor planks 2 are supported. Each of the members 1 is supported at each of its ends by the frame 3 of one of the windlasses which frame is bent in the form of a loop at its lower portion and supports between its upwardly extending ends a drum 4 upon a shaft 5. The loop formed in the lower portion of the frame 3 is of such a size as to fit the end of the member 1 vhich member is preferably of metal, as

' iron or steel, and bent at its end to engage the frame 3 and prevent the frame from slipping off the end of such member. The ends of the members 1 may benotched as indicated to assist in retaining the frames 3 in. proper position upon such members. The heads of the drum 4 haveformed thereon ratchet wheels 6 engaged by spring pawls 7 carried by a rod 8 supported by the upper ends=of the sides of the frame 3.. carries a small sheave 9.

The rod 8 also around which the cable 10 is led from the drum t to an outrigger 11 supported from the upper portion of the building 12. One end of the drum 4 has formed thereon, as indicated in Figs. 1, 3 and 4, an internal ratchet 13 engaged by the end of a lever 14 which is supported by the shaft 5 between the end of the drum and the frame 3. The lever 14 is provided near its engaging end with a slot 15 which permits such lever 14 to slide sufficiently upon the shaft 5 to, engage or disengage the teeth of'the ratchet wheel 13. Thus when the lever istraised the pointed end which is normally in en agement with the teeth of the ratchet wheel 13 slips by the teeth one after another until pressure is exerted in a downward direct-ion upon the end of the lever which-pressure serves not only to move the lever about the shaft 5 but also to move the lever longitudinally so as to bring its shorter end into engagement with one of the teeth of the ratchet wheel 13. A pipe 15 may he slipped over the longer end of the lever 14, it desired, to afford a greater leverage than could be had by the lever let alone. This is done principally for convenience in order that the lovers 14 may not be in the way of workmen upon the scaffold. The lever 14, shown in Fig. 3, has formed upon its left hand end a boss 14 extending into'the internal ratchet wheel 13 thus affording engagement bet-ween the shorter end of the lever 14; and such ratchet. wheel. In the modification shown in Fig. 1 the same result is secured by bond ing the end of the lever 14 as indicated at 14." so that it is brought into engagement' with the teeth of the ratchet wheel 13. As the cable 10 is wound upon the drum 4 and unwound therefrom, the sheave 9 not only rotates upon tne rod 8, but also moves longitudinally thereonto continuously guide the cable 10 in a direction to prevent displacement of the Windlass,

thus insuring that'it always remains in a practically vertical position. The pawls 7 are provided in duplicate, one in connection with each head of the drum 4 as a precautionary feature so that if, for any reason, one fails, the other may prevent accident.- Obviously engaging the internal ratchet wheel 13 by the lever 14 in its lOWGB POSIlZIO II and then removing the pawlsZfrom engagement with the drum 4, the scaifol may be lowered as desired.

- The win a s construct-ion shown in Figs. 5.and 6 is similar to that already described with-the exception that the frame 3* is twisted at its lower end through practically 90 degrees so that the portion 3 is in a position to engage a supporting member 16 extending transversely of the scaffold 17, while the drum of the Windlass .and its supporting shaft also extend transversely of the scaffold. This is done in order that the operat mg levers 14 may extend over the body Jortion of the scaffold. instead of sidewise rom the scaffold as would otherwise be the case.

This form of scafiold is what is commonly.

indicated at 18 to prevent displacement of such members relatively to the scaifold while the frames 3? of the windlasses are held in place upon the supporting members 16 by means of the floor of the scaffold as indicated.

Wh le I have shown my invention in the particular embodiments herein described, I do not, however, limit myself to these constructions, but desire to claim any equivalents that maysuggest themselves to those skilled in the art.

What I claim is:

1. In a scaflold support, the combination of a Windlass frame comprising a U-shaped bar of metal twisted so that its lower portion is at substantially right angles with its upper portion, a supporting member removably carried by the U-shaped bar and formed at its end to prevent relative vdisplacement between the member and the bar,

and hoisting mechanism carried by the,

Windlass frame.

2. In a scaffold support, the combination of a Windlass frame comprising aibent bar of metal twisted below nism so that the lower portion of the frame is at substantially right angles with its upper portion, a scaffold supporting member removably carried by the lower portion, of

the Windlass frame, and hoisting" mecha-' I nism carried by the upper portion of said Windlass frame.

3. In a Windlass, the combination of a frame comprising a U-shaped bar of metal twisted so that the opening through its lower portion extends at substantially right angles with the opening through its upper portion, and hoisting mechanism carried by the Windlass frame In witness whereof, Thereunto. subscribe my name this 8th day of March, AT D. 1910.

ELIAS HENDERSON.

Witnesses:

ALBERT O. -BELL, ALBERT G. MOCALEB.

the hoisting mecha-

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