US2413569A - Scaffolding device - Google Patents

Description

6c. 31, m6. s. ISAK QN 2,413,569

SCAFFOLDING DEVICE Filed May 29, I945 2 Shets-Sheet 1 I INVEN'TOR STIG 'ISAKSON ATTORNEY Dec. 31, 1946. s. lsAxoN 2,413,569

S CAFFOLDING DEVICE Filed May 29, 1945 2 Sheets-Sheet 2 INVENTOR STIZ -|$AKSON ATTORNEY Patented Dec. 31, 1946 SCAFFOLDING"DEVICE Stig Isakson, Portland, reg., assignor of onehaif to George W.

Oreg.

Schumacher,

Portland,

Application May '29, 1945, SerialNo. 596.519

2 Claims.

This invention relates to scaffolding devices and the primary object of the invention is to provide braces for holding the ledgers and uprights of scaffolding in a fixed position relative to one another.

A further object of the invention is to provide a brace for bracing scaffolding that has bifurcated ends, said ends provided for embracing the ledgers and uprights and having a clamping means for holding the bifurcated ends of the brace securely to the uprights and ledgers being braced.

A still further object of my invention is to provide holding brackets for the ledgers of the scaffolding that are mounted upon a tubular body and said brackets having a clamping means associated therewith for gripping and holding the ledgers of the scaffolding to the tubular body, which in turn is mounted to the uprights of the scaffolding. A scaffolding device consisting of a tubular body having knife grips or brackets is covered in my against the jaw 4 securely clamping the brace pending application, Serial Number 585,138, but

in this application I am illustrating the modified form of holding bracket.

These and other incidental objects will be apparent in the drawings, specification and claims.

Referring to the drawings:

Figure 1 is a fragmentary perspective elevation of my new and improved scaffolding device, including a bracing bar.

Figure 2 is a side view of my new and improved brace for scafiolding,

Figure 3 is an enlarged fragmentary detail of the clamping or gripping device used in connection with the brace.

Figure 4 is a fragmentary perspective view of another preferred form of supporting and gripping the cross ledgers of scaffolding to my new and improved scaffolding device.

Figure 5 is a fragmentary side view of the form shown in Figure 4, showing the ledger in section mounted therein.

In the drawings:

This invention consists of a brace I, having bifurcated ends 2 and 3. The bifurcated end 2 consists of an offset jaw 4 forming part of the brace I. On the inner face of the jaw 4 is a corrugated or roughened surface 5 for engaging the ledger 6 of the scaffolding as illustrated in Figure 1. The jaw 4 is secured to the brace I by the offset portion '5. The brace I extends beyond the offset portion l at 8, and has a wing bolt 9 threaded therethrough for engaging the opposite side of the ledger 6 and forcing the ledger to the ledger.

The bifurcated end 3 consists of a jaw Hl secured to the brace I, by the offset arm ll forming part of the brace. The brace extends beyond the arm II, and is indicated at l2. The inner side of the extension I2 is corrugated or roughened at E3 for engaging the upright M of the scaffolding. A wine bolt I5 is threaded through the jaw I9 and engages the upright l4, forcing the same against the roughened surface 13 of the extension l2 securely clamping the brace to the upright.

In operation the above described brace is quick to install, simple of construction and effective in its gripping quality and provides a very rigid brace in the construction of this type of scaffolding, for which I am applying for patent in another application, which onsists of a tubular body l6 having holding brackets 11 for supporting the cross ledgers 6 and I8. I wish to include in this application the principle of providing outwardly extending points 19 from the body It against which is forced the cross ledgers 6 and I8 by the action of the wing bolts 26, which are threaded through the uprights 2| of the bracket H. The wing bolts 20 may have points 22 formed thereon to engage the lumber and further hold the same from slipping or moving within the brackets H.

I show a modified form of holding bracket in Figures 4 and 5 wherein a bracket arm, consisting of a fiat bar 23 is fixedly secured to the body l6 at 24 by welding or other suitable means. A supporting brace or ledge is also secured to the body I6.and provides a resting place for the ledgers 26 indicated in broken lines. Extending outwardly from the ledge or support 25 is a bolt 21 which passes through a slot '28 within the flat bar 23. A winged nut 29 is threadably mounted to the bolt 21. Points 30 are provided on the inner side of the flat bar for engaging the ledger 26 when the ledger is put in place, resting upon the ledge 25. The flat bar is made to engage the side of the ledger by tightening up the Wing nut 29, causing the points 30 to engage the lumber of the ledger, preventing the same from twisting when the wing nut is cinched up.

A modified form of brace is indicated in Figure 3, wherein a hooked end 3| is provided on the jaws 32 and is for the purpose of engaging the uprights, scaffolding and ledgers preventing the same from falling away and providing a more secure way of holding the brace in place, and at the same time providing a more rigid brace. In

3 the use of my new and improved bracing it can be readily mounted to the scaffolding and requires a minimum of space in the storage of the same.

I do not wish to be limited to the exact structure as illustrated, as other mechanical equivalents may be used for gripping the ledgers, still coming within the scope of my invention.

I claim:

1. A brace bar to unite and brace upright and ledger parts of scafiolding and comprising an elongated main bar of appropriate length, an integral offset near each end of the bar, providing with the bar a socket to receive the upright part of the scafiold at one end and the ledger part of the scafiold at the opposite end, the inner face of a part of each socket being roughened to engage the scafiold parts fitting that socket,

and means cooperating with a part of the socket to bear against the scafiold part therein and force the roughened face of the socket into the material of the scaffold part.

2. A brace bar to unite and brace upright and ledger parts of scaffolding and comprising an elongated main bar of appropriate length, an integral offset near each end of the bar, providing with the bar a socket to receive the upright part of the scaffold at one end and the ledger part of the scaffold at the opposite end, one wall of the socket at each end of the main bar being of greater length than the other wall of such socket,

the wall of greater length being projected laterally to provide an end wall for the socket with the projected end wall having a terminal extended toward the shorter wall of the socket.

- STIG ISAKSON.

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