US1111814A - Builder's scaffold. - Google Patents

Description

E. WATERSON.

BUILDERS SGAFFOLD.

APPLICATION FILED 00T. 16, 1913.

'Patented Sept. 29, 1914.

:n y n 1 nvm/ron Eli Wa'ersan A TTORNE KSZ vTo all whom fmajz/ concern ELI WArERsoN, or vioroRIA, BRITISH COLUMBIA, camu);M

BUILDnRs lse-Arrom).` 1

Specification of Letters Patent. Patntd Seipjghg, 11514.

` Appiicatioieq october 16,1913. seriaiNo.795,`5o7.` q

Be it known that I, ELI WATERSON, a citi- Zen of the Dominion of Canada, residing at Victoria, in the Province of British Columbia, Canada, have invented certain new and usefulImprovements in Builders Scaffolds,

of which the following is `a specification.

This invention relates to a building scaffold which has been particularly designed to facilitate the work of bricklayers and ma" sons on the wall of a building by providing for them a strong scaffold which is suscep-4 tible of convenient elevation from the scaffold platform itself, to the level required as the work goes on.

The scaffold is intended to beusable from the ground. level to the height of the `walls of the first floor", `and thereafter from the first,y second 4and succeeding floors to the height of the floorabove. f i j The invention comprises chieflythe construction of a platform `supporting frame com risino a su ort for a workers lat- P s P form in front, a helpersplatform at the l back andbetween them a material platform at a' convenient elevation thereabove. platform support isconstructed to bevertically movable on an upright which is securely braced to a base frame.

The movable platform support is preferably` made of metal and vwhere transport or storage is a consideration the woodwork of the structure is such as can befu'sable in the` i building when the walls are linished.` Y

The invention is particularly 'described in the folowing specification, referencebe-` ing made to the `drawings by which it is a'ccompanied, in which: l f1 Figure 1 is a side elevation. Fig. 42 is a section on the line 2-2 onFig. 1, and Fig. 3 is a plan showing the application of the scaffold support to; the walls of a building.

In these drawings 2 represents the upright of square timber, which at the foot is secured to cross timbers 3, one on each` side of the upright, from which cross frame braces 4 are carried to the uprights. The

cross timbers 3 are notched to removably fit upon a base timber 5 having a cleat 15 on each side and struts 6 are secured for each side from the base timber 5 to the upright.l

The platform carrying frame, ywhich is` vertically movable on the upright 2, comprises tWo side Aplates 10 one on each -side .of the upright and secured at the required This i distance apart by a distance piecellV oneafch side of the upright and forming Vguidesfor theframe thereon, and other distance pieces l12 at intermediatepositionsbetween 11 and "each end.1The distancepieces 12 are between-the lower parts ofthe plates 10 'as they perform another service which lwill be explained later. Theconnected plates 10 `project on each side of the upright 2 and carry on one side the planks" of the worklers platform 27 and on the other side of the upright the helpers platform 28. Above the plates 10, which support the `Worker and helper platforms 27 and 2S, the material platform29 is carried on bearers 14 of angle .iron' one Lon each "side ofy the upright ,2

and maintained the4- required distance apart by a distancepiece 16 on each side, in the same maner as those 11 of the supports `10.

The end v.of each angle iron 14 is supported "from the plates-10 `ofthelower platform l.'suppprttbyy` diagonal struts 13 onv each side oftheupright 2.1,v So'constructed, the complete".1 .platform `supporting i frame is verticallymovableon the upright2 the distance apart g of 'the upper platform supports from thelower,` beingy suflicient to. avoid i any canting of the supporting frame that might cause that frame to bindion the upright and hinder free movement thereon.` This platwire rope passes over a fsheave,` 18 mounted on` the head of the upright andconnected vto a reel 19 which `is rotatablymounted in a frame 20 -secured tothe upperpart oflthe 'platform supporting frame. This reel is operable from the platform by a crank han` -dle`21, and is provided with a ratchet wheel `22 and pawl 23 that will automatically sustain the platform in any desired position of elevation.v The reel carrying frame 20 is preferably attached to 14 by bolts so as to Abe conveniently removable for transportation.

Pivotally mounted at 26 between the supports 10 on eachside of the upright 2 are' extension bearers 25. These extension bearers are normally turned inward as represented by the dottedlines in Fig. 1, but are susceptible of being turned outward on their pivots when it is required to| extend the reach of the platform, as' represented by ,.85 `form supporting frame Jisraised `and lowered onthe upright '2 by a wireropel? `se- "curedto' the upper part of the frame,which` the dot and dash lines on one side of the feo sam-e figure. Whether folded inward out ofusev or extended outward, they rest upon the distance pieces .l2 of the plates 10. In use, a series of these uprights 2 with their platform supports carry the necessary planks to form the platforms 27 28, 29 round the .inside walls of the building, the workers platform 27 being adjacent to the walls. vIn the .wall corners one of the vplatform vsupports setat an angle of fortyfiv'e degrees as to ena-ble an uninterrupted fumare be provided around a@ wel, and

is forv this angular use of the platform aanstaat-e@ extension bearers 25,26 are furnished, asshown in Fig. 3 of the draw-v fto lprovide for the greater length of the das@ f thehworl; vprogresses the platforms are 4eleyated b 7 lifting their supports on the up-v right of the crank handles 2l vuntil the wail is raised to the height of the next 'lioorgabove when that Hoor is laid and the is removed thereto.

I am aware that prior to this invention a 'biiiljders scaffold has lbeen usedl having a raised jinat'erial lplatform between that of the workers and helpers, who distribute-the material to the lworkers, and I am also aware that attempts have been made to provide a platform support that may be raised as the worlg progresses. In all such ywith which I 1 am acquainted ,the platform hasl been "raised a" d lowered from the ground level Aand has 'not been susceptible of elevation by the workerson thefplatforin; nor has lany pro-I vi'sjion' been mad'ehitherto for the extension :of @he planea apport-S to meer the 'quireme't of pijoviding an uninterrupted` `platform.aroungl the corners of the walls of 'abuldna f y f I I amv not aware of any construction which siinpleg'alnd direct y15,0,'accomplish the de- 'sired object as "what is here set forth and wherein the timber required is not framed together, so that it is not usable in the build- 'innf after the walls are completed.

sustaining the platform supporting body on the vertical support.

2. In a builders scai'fold support, an upright,` a platform support vertically movable on said upright and composed of two side plates, one on each side of the upright, distance pieces connecting said side plates and arranged in close proximity to said upright to form a channel way through which said upright projects, supplemental distance pieces connecting said side plat-es together at intervals throughout their lengths, said supplemental distance pieces being located toward the lower'edge yof said side plates and spaced from the upper edge of the same, .whereby to leave recesses above said supplemental distance` pieces, and an extension bar pivoted at one end between said side plates and adapted to be swung over and rest on said supplemental distance` pieces and project beyond vthe ends of said side plates and means for sustaining said platferin on said upright.

In testimony whereof I affix my signature in presence oftwo witnesses.

ELI WATERSON. l/Vitnesses Rowman Bm'r'rArN, MAY IVHYTE.

,vpvpiejs of this patent may -be obtained for iye cents each, by addressing the Commissioner of Patents.

l. Wa$hilig`t0l1, D. C.

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