US1244670A - Adjustable suspended scaffolding. - Google Patents

Description

',E. WHITNEY.

' ADJUSTABLE SUSPENDED .SCAFFOLDING.

APPLICATION FILED AUG-3|. m5.

Patented Oct. 30, 1917;

EGIBERT WHITNEY, 7 OF To an whom it" mafe concern:

Be 'it known that I, EGBERT WHITNEY, a citizen of the United States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful Improvements in Adjustable Suspended Scaffolding, of which the following is a specification. 7

My invention relates to scaffolding of the class particularly adapted for use in the construction of high buildings, wherein a frame of structural steel, reinforced concrete or the like is first erected, and walls of masonry or the like afterward built onto such frame. It is the object of my invention to provide a safe and durable .scalfolding having? a wide platform suitable for the use of masons andcapable of supporting quantities of'the materials used in buildings, as well as being 7 adapted. for the passage of workmen car rying such materialsto the masons; to provide substantially integral all-metal" platform-sections; to provideoverhead protectingmeans for the working platforms;

to provide "simple and eflic'ientf5hoisting means for the raising and lowering ofthe platforms; a'nd'to provide various other novel'and useful constructions and .combi nations'ofparts'as will be more fully set" forth hereinafter.

In the accompanying draws Figure 1 is a perspective view of a section of scaffolding embodying my invention, thesamebe,

ing in position ready for, use upon the frame of a building, Fig. 2'is a detail per spective view, from beneath, of a portion of one of the platform-sections, Fig. 3'is a detail bottom view of the devices for connecting theplatform-sections to the hoisting machines, Fig. etis a detail end view of one o-f theoutrigger's, Fig. 5 is a'detail side view' of aparctr thesame, Fig"; 6 is a detail trans-"f verse vertical sectional view -of parts of the guard-rail and overheadgcoverin'g and the supportstherfcir, Fig."7 isa detail longik tudinal sectionalfvie'w showing certain of the connecting devices, 'Fig- 8 isa similar View showing {the platform and cable-end connectionaand Fig.19 is a 'detailtran'sverse section-"of one; of the Outriggerashowingf the sheave-lock; a Y

Inf carrying out my 'infventionl employany required number ofplatform-sections' A, each which is substantially integral Specification oftLette rs lateiit,

1 and ismade of metal throughout, and comprises, preferably, a continuous rectangular OMAHA, NEBnAsKiuAssiGNoR roris ncnirs'nlsoarroimiive I --coiviPAivY; OF OMAI-I A,'NEBBASKA. .7 o

ratei t do t; .301, 1917 Applica tion'filedAugust31,1915, s eriaiim iasiei frame'l of angle section, intermediate trans- :verse angle-bars 2 of-which theends are 'fiXedly' and 'permanently'secu-red to the lo'n-a.

gitudinal portions of-"the frame lias shown:

in Fig. 2, and acoveringor floor 3 offsheete metal which is fixedly and permanently see-3r curedto the frame formed bylthe members-L.

1 and 21- Th'esaid platform-sections Aai'e 31 made up convenient lengths, such as ten;

or twelve feet, and are of such widththat,

when infuse there is ample transverse space thereon for the masons; for building may terialf for their use, and for the "passage. of otherworkmen in conveying the building material to place, 1

pended from suitable out'riggers' B which When in'use the platform sectionsare sus are'securedto the upper 'partsof the build-,1

ing-frame C, projecting out-beyond thesides thereof at intervals thesameasthe length :of" the platform-sections, was shown in Fig. "11'" -*For a single platform-section two offthe Outriggers-are required, but when 7 I a plurality of the sections are disposed con-:

tinuously along the side of abuildingthereis needed but one"moreof"the Outriggers than thenumber of platform-sections, since each ofthe intermediate Outriggers will! .185

serve to upport the adjoining ends (if-t Of the platform-'se ti 1 I,

Inthe structure illustrated the Outriggers 1 each consist of tWoparallel beams 4 whichl are spaced slightly apart,- enabling sheaves 5 to be mounted between them on the projecting end portions thereof, the sheavesbe-"t be' sus'pended' therefrom? i-On'e or the;

sheaves, orboth if desired, is provided with' meanfs'ffo'r' locking the same to prevent r'otatiorrthereof. suitable lockingfmeans for; the; sheav'es' is illustrated Figs, '5 and 9, j

and consists in the provision of a series iofi;

notches'dn the peripheral portion ofwthec sheave, a; movable latch or plunger-8 dlS-j posed on a guide-block 9 securedbetween thef r beamsfaspring 1O normally; pressmgthe latch toward the sheave to engage th'e end thereof in one of the notches, and a cord 11 or 'th'e like connectedwith the latclrand hanging therefrom, so that by pulling the cord the latch may be disengaged from the sheave and the latter left free to rotate.

Thev'sheaves are provided peripherally with V-shaped gro0ves,such that a: cable of suit-" able size will tend to bind therein, and not slip relatively thereto when passed over the -same. a g e I The ;platform'secti0ns are suspended i from i thesupportingoutriggers by cables 1240f which one :endeof each'is connected with the sections near the outer edges thereof, passing upwardly therefrom and around the outer sheave of the respective, outrigger, thence horizontally to the inneri sheave,

thence around'the latter and downwardly to a hoistingLmacliine D by WhiCliJlt. is connected with the inner ged ge s .of the platformsections. I v

Thehoisting machines employed are preferably of the type shown in Letters Patent No;'=1,1;1l,882, issued to H16O0t0bfl1727 191 4.. Each as said hoistingzimachines comprises, briefly, a frame having vertioal-i'ods l3 on I whic'hz-are mounted two clutch-devices '14 and lithe first being fixedly connected with the frame, theother being vertically slidable on saidrods 13, and a lever 16 whichis-connected with the ,slidable clutch for moving ita-re'lativel-y to theother. The cable passes upperv and lower cross-bars 25 and-19 ofthe inachine-frame, and may extend on down 7 below the machine indefinitely.

, Forconnecting the ends of the "cables 12 Withthe outer partsof the platform-seer tioiis, said ends .0f;-the cables have secured thereoi'i. bars 17 of which: the ends form hooks, each adapted toengage-the depending flange atitheeend of the frame 7 l of a- :platforni section,iasishownclearly in Figs. 1 and; v

8.-= Near the, opposite or inner sides of said frames 1 there are secured on the ends theretionszarerofi'set transversely fromeach other as shown. in Fig 3;, so that one ofv the bars 1 of the :Z-bars 18 which are adapted toengage the aloiter cross-bars 19 of'the hoisting machines, asqsh'own in Figs, 1 and V7 Thez barskoiiadjoining ends of the platform-secwiil beiat each side of the depending pordisposed iairoundwthe cables 12 i and having their flower lends v(resting on, the ghook-bars 17 asshown in Fig. 8. The guard-rail is pro Vided with openings for the cables, and rests on the upper ends of the pipes 21, as shown ting or the like, -is' secured to the guard-rail and extendsdown therefrom to the outer 'edgeof the platform; as shown in Fig. l.

" It is also desirable in nearly all instances to providea-covering or overheadkshield, to

protect 'workmen on the main or working platform-sections A from iii ury by ob ects I falling upon them from above. ic sucha coveringis conveniently supported by means of tubularstandards or pipes 28 and 24 dis- I in Fig.6. A screen or guard22,'oif \vire'netposed around the inner and outer vertical e -,portions ofthecables 12, the outer pipes 24:, -,resting on the guardrail as shown in Fig. 6, the .inner pipes 23 resting on the upper crossbars 25 of the. hoisting -machine frames, and the length of said pipes being such that their upper ends are at the same rests upon the upper ends of said pipes 23 and 24:, being prov ded with openings for ,the passage of the -cables through it, and ,1 the body-portion of the shield being of any desired material and construction,

V 185 v level Thecovernig or. overhead shield 26 v The operation of raising and lowering the, SCELfl OlClIDg will be. lGiIClllY apparent. By

suitable manipulation of the hoisting 111121- chines D. the; same may be caused toinove upwardlyor downwardly upon the portions of the respective cables which passthrough.

them, asfully explained in the Letters Patent for saidmachines, hereinbefore referred to. In raising or lowering thescaffolding it ispreferable that the machines atlopposite ends of any particular platfornrsection be operated alternately, so that first-one end of the section and thenrthe other is moved 'to raise or lower it a moderate amount, such as ten to twenty inches. ,During theoperation of anyviof the machines D, th latch 53, for

locking the sheave 5 .on the respective outrigger, isreleased by pulling on the .cord 11, so that the sheaves are free to'turnand thus enable the cable to run over them.v Then as the'innercorner of the.platform-section is,

moved by the raising or lowering of the vniachine, the outer corner. atthe sanieend is automatically kept at the same level byl thet running of the cable over the sheaves. This automat c transverse"leveling of the platform-sections at the end -tha-t is-being IadQ justed, is insured by keeping the otheriend. of the section stationary and; level trans-j versely during-such adjustment. When this" is'done, any tendency of the inner side or: corner at the moving. end of the section to go to a higher orilowerrlevel thanthe-outer, cornercauses a torsionalstress in the body of the section, and, as the rigid integral structure .-of the sections prevents torsional deflections;- ,thereof, an .actuati gj force is transmitted: top-theouterj corner such as to insure the cable running over the sheaves on the outrigger, sufliciently to equalize the vertical movements of the inner and outervco-rners of the section at the end being adjusted.

Now, having described my invention, what I claim and desire to secure by Letters Patent is: a

1. In apparatus of the class described, supporting outriggers extending horizontally, acable for each outrigger, each cable having a horizontal portion extending parallel with the outrigger and vertical portions depending from said horizontal portion, means movably connecting the cables and Outriggers, a Wide substantially rigid platform-section disposed beneath the outriggers and having one of the depending portions of each cable immovably connected therewith atone side, adjusting means for connecting the other depending portion of each cable in varying relations to the other side of the platform, and releasable means for preventing movement of the cables relatively to the outriggers.

2. In apparatus of the class described, Outriggers, cables connected therewith and depending from longitudinally-spaced parts thereof, platforms carried by said cables, tubular standards disposed around the cables above the platforms, and guard-rails having openings through which the cables pass, the guard-rails resting upon and being support ed by said tubular standards.

3. In an apparatus of the class described,

outriggers, cables connected therewith and depending from longitudinally-spaced parts thereof, platforms carried by the cables, tubular standards disposed around the cables above the platforms, and an overhead covering for the platforms, having openings through which the cables pass and resting upon the upper ends of said tubular standards so as to be supported thereby in spaced relation to the platforms.

4. In an apparatus of the class described,

rigid integral substantially rectangular plat-' form-sections disposed with the ends thereof adjacent to each other, supporting outriggers disposed above the adjacent ends of the platform-sections and extending parallel the ends thereof adjoining each other, supporting Outriggers disposed above the adja cent ends of each pair of platform-sections, a cable for each outrigger, means for detachably connecting one end of each cable with the respective platform-sections at points near one side thereof, hoisting devices detachably connected with said platform-sections near the other side thereof, the cables extending continuously from the deta'chably connected ends thereof over the Outriggers and thence to therespective hoisting devices, the cables being movable over the Outriggers, and means for controlling 1 movements of the cables and maintaining the transverse level of the platform-sections.

6. In an apparatus of the class described,

a platform, vertically extending cablesconnected with and supporting said platform, shielding means disposed adjacent to said platform, and means for supporting said shielding means comprising parts loosely engaging the cables but retained in position laterally thereby.

EGBERT WHITNEY.

Copies of this patent may be obtainedfor five cents each, by addressing the "Commissioner ofPatents,

Washington, D. 0. V

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