US1712974A - Scaffold bracket - Google Patents

Description

May 14, 1929.

w. G. VENARD SCAFF'OLD BRACKET Filed Sept. 6, 1927 2 Sheets-Sheet INVENTOR, 76774 74 ATTORNEY May M, 1929. w. G. VENARD 1,7

SCAFFOLD BRA Filed Sept. 6, 1927 2 Sheets-Sheet 2 INVENTOR/ W63 75 rad;

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Patented May 14, 1929.

"PATENT OFFICE.

WILLIAM G. VEIIARID, LOS ANGELES, GALIFOItNIA.

scarrorn BRACKET.

Application'filed September a, 1927. Serial No. 217,814.

This invention relates to contractors equipment and more especially to' scaffold brackets.

it is very desirable to provide a simple, practical, safe and easil erected bracket means whereby to suppor temporary platforms, derricks and other equipment, and

more especially to provide a bracket device which may be readily attached to divers forms of principal supports such as maybe permanently or temporarily in place in many kinds of structures and structurahelements.

An object is to provide a bracket structure ofample strength and not excessive cost, and to provide a bracket whose application may be accomplished safely by unskilled labor.

A further object is to provide a bracket whose parts are of'simple stock material in volving a very minor degree of. cutting and shaping; the intention being to reduce or wholly eliminate requirement of complex.

parts, to obtain strength and rigidity and at the same time enable use of light weight material, and employ a simple mode of assembly and application, and where necessary provide for efi'ective adjustment of elements as to length 'andheight.

Numerous additional objects, advantages and features of construction, combination' and detail elements will be made manifest in the following specification of the herewith illustrated apparatus; it being understood that modifications, variations and adaptations may be resorted to within the scope, principle and spirit of the invention as it is more directly claimed hereinafter.

re 1 is a plan of a bracket as applied to a 'pile; platform planks being shown in dotted lines.

Figure 2 is a sectional elevation of the device ofFig. l. v

Figure 3 is an end view of a portion of the bracket.

' Figure 4 is a side .view of the bracket and;

safety bracket clamp.

Figure 7 is a diagrammatic View showing use of the brackets upon'a ferry-slip pile system. w

Figure 8 shows a vertically sectioned wall with primary supports stood at awindow saidsupports.

F gure 9 is a plan thereof.

Figure 10 is a frontelevation showing a bracket carrying an auxiliary, corner bracket crane;

Figure 11 is a perspective of a detached stirrup.

Figure 12 is a perspective of a form of bracket for supporting a crane or derrick rlg.

The invention is shown as being embodied invariant forms all involving the same principle which consists of a bracket -toeing against a vertical, primary support and held in position under tension of a bight of chain whose ultimate tension is acquired by a leverlike action of a component of the bracket moving about an upper toe for a fulcrum to tightenup the slung bight.

The bracket structure is shown as adapted for supporting .a workmens platform in several gures and in Fig. 12 is shown as adapted to form a journal for use of a swing ing derrick or crane; noplatform arm being utilized.

. primary support, as a pile P (or other element) and whose free end is then hitched on the hitch key at the slot 7* thereof while the lever arm 2 is in an angular position with the key 7 in a plane higher than the pivot 3 and with the toe 2 resting against the support it will be seen that the bight of chain 18 will be highly tensioned as the arm 2 is forced down until the key hitch lies just below the pivot 3. When so applied the outer end of the arm 2 is bolted down on the outer end of'a diagonal brace-piece 10 whose %ower end is attached at ll'to the foot of the eg 4. By making the parts 2, 4, 10 of. channeliron, lightness and great strength are had;- these parts meshing one in the other respectivelyi 1 To provide for adjustment ofthe bracket device to increase the length of its arm part an extension arm section 2 is provided to be bolted at 12 up to the arm 2. Themain' I increase the factor of safet against danger of breaking and slipping the bracket and suitablerail or rope for that purpose a chain bight, tensioning lever having lateral, up er and lower toes 21--22 is applied to the eg 4; the lever having a bight hitch or key 7 for the chain 8.-. Booking the lever over its toe 21 will tension or release the chain, according to direction ofi lever movement.

To increase the safety of workmen on the platform A laid on a string of the brackets, the outer ends of the arms may have a stanchion socket 24 to receive stanchions 25 of a guard.

The present invention has use in erecting J a platform A along the outer face of a wall Wghaving window openings 0. In such a case .studs S are stood against the wall, in-

side and outside, at the opening 0 and a bracket has its chain 8 thrown around the two studs and tensioned, Fig. 8 and 9. Plank platform is then laid on the arms 2. To support the overhanging ends of the planks near the corner C of the wall cranelike derricks or brackets D having hooks 26 are hung onthe stirrups 27 these having holes 28 for the hooks. A pair of the crane brackets D is employed and they are relativelv angularly disposed so that a crossplank or bolster29 can be laid parallel to the bracket arm 2 and form a base for the overhang of the latform A.

device 20, Fig. 4. The back of leg 20 has a cross-piece -7 to one end of which the chain 8 is attached and the other end of the chain is hitched to the slotted part "7"; the

"cross-piece being disposed near the upper toe 21. Upper and lower stirrups 27 provide journals for the inserted hooks 26, Fig. 10, of a swinging crane or derrick when applied to the bracket 20, which is devoid of platform arms and is designed to be, attached to studs or columns and support an applied derrick such as may be used for general hoisting purposes.

It is understood that the members forming the different brackets may be made of various sizes and lengths, and desired material.

What is claimed is l. A contractors equipment bracket including a top arm, an upright leg ivoted thereon, said parts having upper an lower support-engaging toes, a bight of chain to wraparound the enga ed support, and a chain hitch, for the big ht connected to the arm beyond its pivot so as to be effective to tension the chain by lever action of the arm; the said leg having upper and lower stirrups for pivotally supporting an applicable equipment part.

2. A contractors equipment bracket including a vertical member with an abutment too at its lower end, and a horizontal rest arm pivoted on the upper end of the said member and having an abutment toe portion on its inner end, a support engaging chain bight, and said arm having a hitch disposed outwardly from and in a line below its pivot for the bight and whereby the bight is tensioned on a support as the arm is brought horizontal.

1 3. Contractors equipment including a bracket having an upright member with a 'toe on its foot end, a platform arm pivoted on the upper end of said member and having a toe end beyond the pivot, a chain bight, a hitch means on the arm for the chain ends,

.and a brace for connecting the remote ends of the arm and said membersaid arm operative to tension the bight by tilting on its pivot.

4. Contractors equipment including a vertical leg structure. having an abutment toe on its foot end, a horizontal arm pivoted on the top of said leg and having an abutment toe on the upper end of the structure, a bight. of chain and a hitch means on the upper .end of the structure for tensioning the bight on a support to hold the toes applied thereto,

a swmgin' crane-like device having pivot hooks, an stirrup plates on said structure to receive the said hooks.

WILLIAM G. VENARD.

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