US1258402A - Folding scaffold for silos. - Google Patents

Description

W. W. GARNER.

FOLDNG SCAFFULD FOR SILOS.

APPLICATION FILED MILS, |911.

1,258,402. Patented Mar. 5, 1918.

2 SHEETS-SHEET I.

la 1*!!1 1% WMM lI W. W. GAHNER.

FOLDING SCAFFOLD FOR SILOS.

APPLICATION mEn JAN. 19H.

1,258,402. Patented Mar; 5, 1918.

2 SHEETS-SHEET 2.

of and adjacent to one side of the openingsV Suitably mounted on the outside of thesilo wall `near the ground is a windlass 38, which is provided with a ratchet and dog mechanism A39, adapted to prevent unwinding of the rope or other flexible device on the windlass. Flexible devices-fi() are secured at each end to the opening 21 in links 19, and extend through suitable eyes 41, which are placed adjacent to the inner ends of theplatforms 2Q. A flexible device 43 1s fixed to the flexible device 40 intermediate ofthe eye-bolts 4:1, and extends up over the roller 14, through the pulley del, back o ver the roller 14 and down to a similar flexible device 40, at the other side of the platforms 22.

The pulley 44 has a fiexible device i5 de-y tachably secured thereto and extended over the `pulley 37'V down to `the windlass 38 to which the other` end is secured.v

A hook-46 is secured in one of the rafters 12 adjacent to the `roller 14. 4

It will be `understood that this device is intended for use in connection with the installation of a blower pipe, such as'has recently come `into the general use for the filling of silos.

Whenever a blower pipe has been installed, in the past, it has been the custom to place a ladder against a silo wall and have a man climb the ladder to a point adjacent to the opening 16, and from his precarious perch on the ladder to pull the blower pipe up to said opening, so that the elbow of thepipe might be hooked over the top of the silo wall. It was then necessary for the operatolyrfrom asimilar precarious position to pull the blower pipe, which is used for distrilmting the ensilagc on the in side, up to 'the elbow, and extend it through the opening 16 and `hook `it to the elbow. This lprocess involves a largeamount of danger to themen who has to work at the top of the silopulling up the blower pipe,

but it was impossible to use alscaffold of` ordinary construction for the operator to stand on, becauseof the expense of providing a` ermanentscaffold, andbecause if such a `sca old were used on the `insideof the silo, it would preventvfilling the latter up to the top ofthe silo wall, thereby `wastingconsid erable space.

The applicant "has provided a folding l scaffold whichis adaptedto 'extend from the door in the silo wall, which is always provided, across the top of the silo to the opening in the roof which receives the blower pipe, whcrebyi'he operator .may stand on a secure platform while he is pulling up the blower pipe, v

This enables the operator to work at greater advantage, and at the same time limitsthe possibilities of `accidents on account of the precarious footing, such as is the case Where temporary supports are used for the operator to stand on.

In the operation of this device, it will be understood that thefiflexible device 115 extends through a suitable notch, either `in the doori or inthe roof adj acont' thereto, and over the pulley 37 down to the windlass 38;

Assumethat the platforms are in the position shown in Fig. 1, and that itis desired to fold up the scaiold, it is only necessary for the operator to stand on the ground and turn theiwindlass 38 until the flexible de vices 43 `are pulled over the roller 11i a sufiicient distanceto raise the platforms 22 to the position shown in Figp.

During the tighteningof the flexible devices 43 and 44, it will be understood that the first movement of the platform 22 will be to rest on the inner ends, then as the flexible devices are further tightened, the outer ends will commence to force the bolt 2G upwardlyin the slot 20, and when the flexible devices are drawn taut at the end `of' the movement, the parts will be substantially in the position shown in Fig. 3.

This construction enables the silo to be filled to a point Substantially level with the top of the silo, so .that no space is wastedby the use of the scaiold.

It will also be `understcxod that when the scaffold is in its horizontal position, the pulley 44 may be unhooked `from the flexible device 45, and `hooked to the hook i6, where upon the iiexibledevice 45 may be used for pulling up the sectionsof theblower pipe from either the inside or outside of the silo by changing the `position of Vthe crane 3h with relation to the upright 34.

A trap door 47 is provided in `the end of the platform Q2 `beneath the vopening 16, so that the scaifold maybe left inposition when the blower pipe is installed in-the silo.

Some changes may be made "in the construction and arrangement of theparts of my improved device without departing nfrom its essential `features and purposes, and it is my intention to cover -by -this ap lication any such changes which may be` included within `the Scope of `my claims.

I claim as my invention:

1. lnia device of :the class described, a

`pair ofspaced walls, a pairof spacedarallel links "pivoted at onelendyto one Wa 1,:a similar pair of links similarlypivoted to the other Wall and adapted to register `with the first pair 'of links, a pair of platforms Y having their inner ends disposed adjacent to each other and their outer ends pivotally VretenezV supported by the free ends'ofthe respective i pairs of links, means for supporting the.

a pair of platforms having their ends plv otally and slidably mounted '1n sald slots,

means for supporting the free ends of the platform in substantially horizontal `alinernent with the lower ends of the slots inthe links, and means forraising the `platforms and links toa position where the links are substantially parallel to the kadjacent platforms, and the platforms arel in angular position relative `to each other.

In a device of the class described, a panl of spaced walls, a supportabove and between said walls, plurality ofvlinks piv-,V

oted at one end to each of the walls at points in horizontal alinement, said links having elongated slots therein adjacent toptheir free ends, a pair of platformsf'having one end pivotally and slidably" mounted in the slots in the links, lmeans for supporting `the Y. free ends of the platforms, in substantially horizontal alinement with thelower ends of the slots in the links, a plurality of flexible devices having one end fixed to the lower ends of the links and their intermediate portions slidably received respectively in the free ends of the platformsand the support, and means for shortening the flexible devices between the support and the links;

1l. In a device of the classdescribed, a

pair of spaced walls, a support above and` between said walls, a movable Aplatform extended between said walls, comprising two abutting sections,`m`eans for supporting the outer ends of the sections adaptedto permit longitudinal movement thereof, and a pair of angular brackets having one end pivcted te the inner ends of the sections, and the apexes of the angles pivoted together, a

flexible device extended between tlie upper ends of the brackets, and a supporting means fixed at the upper end to said sup- Copiel of this patent may be obtained for platform adapte the walls of a silo, said `platform being port and at the other end tothe flexible *dei-i vice intermediate `of its ends.

Y 5.111 a foldin silo scaffold, a folding to be extendedbetween spaced downwardly from the'upper edge of the walls, means `for folding said 'form up to .position substantially the lines of the roof, said means being capable of beingoperated from the ground.

lat-Y wilhin,

6.` The'combination,oftwo scaffold Iplat-l form members in line with eachy other,means ,t for connecting them at thelradjacent ends whereby they `may fold upwardly, and

`means at their outer ends for slidingly and pivotally securing them to a stationarysupport, whereby an upward pull upon the adjacentv ends of the platform members will cause them to fold upwardly and also to move bodily upwardly a their outer ends.

7. Thecombination of two scalfold platp form members in line with each other, means for connecting them at their adjacent ends whereby they may -fold upwardly, and;

meansat their outer. ends for slidably and pivotally securing them to a stat1onarly;

port7 whereby an upward pull upon t e ad jacent ends of the platform members will causethem to fold upwardly and also to move bodilycupwardly at their outer ends, and means for adjustabl suspending the Yadjaeentpen'ds of the platform members.

l8. In a device of the class described, a

' circular `silo wall, a roof thereabove, a movable platform extended between saidwalls below their upper edges and comprising two abutting sections, means for support ing the outer ends of said sections inY position below the upperedge` of the Wall, means for adjusting the length of each section,

and means for supporting the inner ends of the platform in substantial alinement with "the outer ends, said last described means being` adapted to yieldingly spread the inner supends of the sections, whereby theouter ends y Vof `the scaffold may abut against the circular inner surface of the silo to Vprevent lateralV movement of the scaffold relative to the wall. x

Des YlVIoines, Iowa, December 29, 1916;

WILLIAM l/VAITMAN GARNER.

ve cents each, by addressing the f Commissioner of Patents, `Washington, D. C.

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