US1714044A - Scaffold - Google Patents

Description

M y 1929- J. L. PEDERSEN SCAFFOLD Filed June 6, 1927 2 Sheets-Sheet gnuwnfoz W w Jam/s L. PEoERs E;

Patented May 21, 192

"UNITED STA res JULIUS HEIDI-KEEN, OF ESGANABA, MICHIGAN.

scarronn. j

. Application-filed June 6,1927. Serial No. 196,841.

My invention relates to scaffoldaparticularly of the painters type, and has for its primaryobject the provision ofa novel, simple and eflicient scaffold capable of a variety of 6 adjustments relative to a wallof-a building.

- Another object of the invention is the provision of-a platform scaffold provided with I a-standard and having means for vertical adjustment ofthe" platform relative to the standloard.

A further object of the invention is the provision of a standard supported scaflbld of sectional construction. A still further-ob ject is the provision of a scaffoldof this char- 15 acter having means for-adjusting thescafiold laterall of a building wall as well as vertically re ative thereto.

With these, and such objects in view as will be apparent fromthe description, the inven- 20 tion resides in the novelconstruction, combination and arrangement of arts hereinafter described and claimed and illustrated in the accompanying drawings of which,

Figure 1 is a perspective of'the upper per- 25 tion of a building with the scaffold mounted in position relative thereto; w

Figure 2. is a side elevation of the scaffold as mounted in Figure 1;

Figure 3 is a top plan view of the scaffold 30 platform with the railing structure removed;

Figure 4 is a group perspective illustrating the manner of mounting one of the corner posts of the platform railing;

Figure 5 is a group perspective illustrating the manner of attaching the sectional elements of the standard. y

In detail, the scaffold comprises a standard consisting of a plurality of sections and 11 adapted for detachable connection in end to end relation and formed of squared cross section. At the meeting ends of the standard sectionsone of the section ends is provided with a squared socket 12 adapted to receive the squared reduced end 13 of the abutting section end for effecting a connection between the sections. The assembled sections are locked in connected position by means of a retaining member in the form of a'bolt-M adapted to be passed through the alined transverse bores 15 and 16 provided respectively in the walls of the socket 12 and through the reduced end 13. A cotter pin 17 cooperates with the bolt 14 in a conventional malmer for retaining the bolt in position.

The lower most section of the standard, designated as 10, is provided at its bottom with tion thereof.

an entrance member fashioned as a s ike 18 adapted to be driven into the earth or disposing the standard in vertical position parallel to a building wall as shown at 19. The standard sections are rovided throughout with a vertically spaced series of transverse bores 20, those adjacent the top of the standand being arranged in relatively closer relation than those disposed over the major por- The upper end of the standard is anchored in posltion by means of a roof brace consisting of a squared collar 21 slidably disposed over the upper end of the standard and anchored thereon in the desired adjusted position by means of a bolt 22 passed transversely through the walls of the collar and one of the bores with which the standard is provided. Secured to the collar 21 and extending from opposite sides thereof in relatively widely diverging relation are two brace arms 23 connected together for structural rigidity by means of a central brace arm 24. The free ends of the arms 23 are provided with eyes 25 to which are secured the free ends of a cable 26, which cable is adapted to be passed around some porgim of the roof structure such as a chimney The brace arms 23 are inclined upwardly relative to the collar 21 as best shown in Figure 2 for accommodating the brace to the eaves of an inclined roof 28. It will be ap parent that by a reversal of the to brace, the brace arms 23 may be downwardly inclined to provide for an effectual hooked engagement over a parapet, or the like, which is usual in some roofing constructions.

The operators support of the scaffold consists of a squared platform made up of angle metal bottom side bars 29, to the upper flanges of which are secured s aced floor boards extending transversely lietween the side bars. The central floor board is formed with a sleeve 31 of squared cross section and adapted for sliding engagement vertically u on the standard. Carried by the sleeve 31 1s a block and tackle pulley 32 and similarly arranged upon the collar 21 is another pulley 33. A cable 34 disposed over the pulleys 32 and'33 in the conventional manner of block and tackle arrangement, provides a means for raising and lowering the platform upon the standard. A cleat 35 is provided for attachment to the standard body for securing the free end of the cable 34, and the platform is further anchored in the desired adjusted po-' sitionby means of a retaining pin 36 passed -through ,thewalls of the sleeve 31; beneath the platform and extending through one of the bores 20 with which the standard is provided.

In the assembl and operation of the in vention, the stan ard sections are joined together and the standard is arran ed verti-. cally in parallel relation to a building wall, with the platform resting upon the ground.

The top brace collar 21 is secured in the desired adjusted position and the cable 26 attached around the chimney. The operators platform may then be raised to the desired vertical standard permits of the scaffold being arranged in the angles of such walls.

At each corner of the platform a cylindrical socket member 37 is attached to the fioor\ boards for the reception of the lower reduced end of a corner post 38, each corner post being provided at its upper end with an upstanding pin 39. Hingedly connected side rails- 40 are rovided for engagement over the upper en s of the corner posts. Adjacent each' post, certain of the rails are providedwith laterally projecting lugs 41 apertured for en-? gagement over the pins 39 whereby the rails are retained in, position upon the posts. Diagonal brace rods 42 extend beneath the platform from the sleeve 31 to the four corners of the platform and each of the corner posts 38 is reinforced by diagonal cables 43 arranged between the respective posts as best seen in Figures 1 and 2, wherein apertured ears 61, 60 are shown carried by socket memsage of the cables 43.

While in this preferred embodiment of the invention, I have illustrated and described certain details and material entering into the construction and operation thereof, I desire it to be understood that the invention is not to be limited thereby, but that any desired changes and modifications may be made in structural details as will fall within the scope of the invention as claimed.

Having thus described the invention, what is claimed is:

1. A scaffold comprising a single ground and roof-surface supported standard, a collar adjustably mounted on said standard, divergent laterally and upwardly extending roof engaging arms carried by said collar and adaptedto rest upon a roof-to hold the standardin spaced relationship tot-he building wall and against lateral tilting, a platform adjustably mounted on said standard, a flexible connection having its ends carried by the ends of said arms, said connection being ada ted to engage around a chimney or other roo projection.

2. A scaffold comprising a single standard adapted to be set up adjacent a building wall in parallel-spaced relation therefrom, means carried by said standard for anchoring the upper end thereof'to a roof structure, a platform arranged on said standard for vertical movement thereon, means for raising and loweringcsaid platform on said standard and in part carried by'said anchoring means and in part carried by said platform, and means for anchoring said platform at any desired elevation on said standard. 4

3. In a, scaffold, a vertical standard, means for anchoring the bottom thereof in the ground adjacent a building wall, a vertically adjustable roof brace carried by the'upper end of said standard and including divergent roof-surface engaging arms, means for holding said brace at predetermined oints on said standard, a platform arrange for slidable movement. vertically on said standard,"

a' block and tackle connection between said platform andsaid roof brace for moving said platformvertically on said standard. 4

4. In a scaffold, a carrier comprising a rectangular-platform, a standard, said platform having a medial bearin through which saidstandard extends, said caring having diagonally extending arms extending in the direction of each corner of said platform, one

pair of said. arms bein disposed at right angles to the other pair, oor supporting SlllS secured to the ends of said arms, posts rising from said sills at the ends thereof, a railing comprising hingedlyconnectedsections,apertured lugs at the ends'of said sections and engagin the upper ends of said posts whereby to ho cl said railing in position to conform I to the outline of said platform. bers 37 and rails 40 respectively, for the pas- 5. The combination set forth in claim 4, and said sills and the railing sections of said posts having securing means for a flexible connection, and a flexible connection attached to said securing means to brace and ragidify ering means in part earned by said roof enga'g' g braceand in part carried by said platform, and a flexible chimney-engaging connection having its 'ends' carried by sai arms.

7. A scaffold comprising a vertical round and roof supported standard, means or anchorin the bottom thereof in the ground, upwar ly and laterally extending divergent roof engaging arms carried adjacent the top of the standard and adapted to rest upon a roof for supporting the top of said standard adjacent e roof, a platform adjustably mounted on the standard, and means carried by said arms for engagement with a roof for holding the arms in contact therewith and the standard against outward movement.

8. In a scaifold, a carrier comprising a platform, a standard, said platform having a medial bearing through which said standard extends, said bearing having two pairs of laterally extending platform-supporting arms, one pair of said arms being disposed approximately at right angles to the other pair, floor supporting sills secured adjacent the ends of said arms, posts rising from said sills adjacent the ends thereof, a railing comprising hingedly connected sections,

apertured lugs at the ends of said sections and engaging the upper ends of said posts whereby to hold said railing in position to define a safety area upon said platform.

In testimony whereof I afiix my signature.

JULIUS L. PEDERSEN.

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