US1660693A - Scaffold - Google Patents

Description

Feb. 28, 1928. 1,660,693

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SCAFFGLD.

Application filed July 19,

' This invention relates `gentnally to scaffolds, but specifically has todo with putlogs adapted for engagement with a masonry wall, or the like, for t ie erection of scaffolding. f

The invention contemplates the inclusion of means adapted for insertion in a masonry wall thus comprising a support for one side of the scaffold.

Another object of the invention resides in the provision of means for locking the putlog in a position to positively preventthe movement of the same out of the wall when work is beingperformed on the scaffold.

Still another object includesl means for unlocking said putlog to permit the removf. al thereof without injury to the attaching wall. Y l

The invention Vis further fcaturcdby its simplicity of construction,- and its ei'iiciency in operation. l f

With these objects in view, togetherwith others which will appear as the description proceeds, the invention resides inthe novel formation, combination and arrangement of parts, all as will be described more fully hereinafter,illustrated in the drawings, and particularly pointed out in the claims.

In said' drawings: v Figure 1 is an elevation of the device.- showing its application to a masonry wall.

Fig. 2 is an end elevation of the same removed from the wall. Y

Fig. 3 is al fragmentary plan view of the working end 0f the device viewed from the base thereof.

Fig. 4 is a sectional view taken on the line 4 4 of Fig. 3.. p

Fig. '5 is a detail view of a clincher plate. Fig. 6 is a detail' view of the locking and releasing means;rand

Fig. 7 illustrates the position of the end of a clincher plate and the lateral portions ofthe locking/means with respect to a typ ical masonry wall.' f

In order that a clear understanding of the device may be had, the specific details of the working end of the putlog will be first described, and while the drawings and description will refer to a single putlog, it is, of course. to be understood that in practice the use of several is contemplated.

Referring now to Fig. 1 of said drawings, let 1() denote a supporting member of suitable proportions, the working end thereof being provided with a relatively narrow lon- 1927. serial No. 206,852(V gitndinal recess 11, which is open at the forwanlend of said member 10 and along thev bottom portion thereof for a suitable distance.r nFig. 1 this'recess 11 `may be followed by thedotted lines and it is obvious that thef'same is adaptedV to receive the c'lmcher plate 12,(see Fig. 4). Extending from the forwardendrof said memebr 10 a certain'distanee l' provide a slot 13, which vopens into saidrecess v11 and is really formed by laterally enlarging the lat-ter. The particular configuration of said slot 13 dependson the dimensions of theloclringemeans 14 (sli-own in Fig. 6),v wherein.it'will-y be observed that the rear p'ortion'l is somewhat narrower thanr the walleengagin'g forward.

endv 16' thereof, the latterbeing forked to .define lateral portions 17 and 18 having a slot 19 therebetween.. Said slot' 19 is a trifle largerthan the width of said C lincher plateA 12 and is adapted to straddle the saine, as.

will `presently appear. Referring again to slot 13, itl 1s apparent, after a study of Fig. 3, that the vforward end thereof is enlarged, as indicatedY at lvand as shown, f

. said locking means or bolt 14 may be retracted fromA the position shown in said-Fig. 3 when the device is to be released from a masonry wall.

ln assembling the putlog, said clincher Y plate 12 is inserted inthe recess 11 and firstbolted to said supporting member 10, asindicated at 2O, (Fig. Disregarding for ,the` 4 momentv the particular formation of said plate 12, the nent step isy the insertion of the. locking means 1'4 within the slot 13, whereupon a U-shapedstirrup member21 is engaged over the sides ofi said memberl 10 and bolts 22 passed therethrough thusvsecuring said `clincher plate land stirrup in theV assembled relation shown in Figs. l and'2.

Upon inspection of the' drawings, especially Fig. 4, it: willbe noted that said locking rmeans 14 is provided with a downwardly di# rected lug 14a and that the bottom portion of said stirrup 21 is provided with an opening 21a, through which latter said lug 143; is inserted and from which it depends duringA and after the assemblage' of the, parts as 1 aforesaid.

Returning vnow to the detailed construction of said clincher plate 12, ,it willzbe ob- Y served'in Fig. 5V that the same is reduced in height at the forward'end thereof, as lshown at 23 and that the bottom forward edge thereof is provided vwith a bill 24. Said for-V ward end projects beyond'the :tace of said .former limiting the rearward sliding movement ot' said locking means 14 and the latter Vengaging the rear portion 19a, (see Fig. 6), of said slot 19,wvhen said locking means is advanced to the position vshown in Fig. 4.

Said clincher plate may also be shouldered,

as at 29 to abut the forward edge of said stirrup 21 (see Fig. 4), andk adjacent thereto I provide an arcuate notch 30, which is adapted to straddle'the upper corner o1" a Vbrick V- or the like, in order to prevent crumbling or breaking of the same. ,A careful inspection'of Fig; 1 will clearly show the exact positioning of the same with respect to the masonry wall. r f

In the use of the device, the artisans omit' the mortar in the verticalijoints of a course ot brick at intervals approximately every six feet, and also a portion of the motor is removed from the horizontal joint, as shown at 31 and 81a respectively of Fig. 7. The

i lockingmeans is now retracted by pushing rearwardly on the lug 14a which rides down the4 slot 21a otsaid stirrup y21 until Vthe lateral portions 17 and 18jlie inwardly oi the tace ot vsaid supporting`l member 10. The clincher plate 12 is then inserted in the ver- 'ticalrjoint 31 and then moved downwardly until the bearing edge 23a of the portion 23 engages the top of a brick and the bill 24 protrudes below the`.opposite side of the wall. V,The locking means 14 is now extended by operating said lug 14a, whereupon t-he rear portion 19av ot said slot 19 engages the shoulder 28 and limits the'position of said lateral portions 17 and 18 into engagement with the horizontal joint- 31a' of said wall.

From theabove it is apparent that t-lie over hanging bill 24 prevents rearward move-.-

ment of the'device Vand further said'laterfal Vport- ionsl 17 and 18 positively lock the putlog against movement, laterally orV otherwise, out of the wall.

It is quite manifest that in releasing the device it is only necessary to slide the locking means 14 rearwardly and slightly elevate the portion 23 of the clincher plate to release said bill 24.

In completing'the structure the outer ends of said supporting members 10 are spiked to the usualupright or supporting poles 32, "as

order to lend rigidity tothe structure it is customary to provide ledger boards 34 which is also secured to 'said iiprights 32, as indicated at 185. rlhe platter-m 36 consists of a series of suitable planks, or. the like, which are preferably overlappedabout six inches at each end and will have support at three points. i i Y It is to be i'urther noted that I provide a little lateral play between the clincher plate and the sides oi the vertical joint 31 which permits suit'icient lateral movement at the pole end of the putlog` to compensate slight irregularities in the spacing ot poles and permit the putlog to be spikedto same.

It is, ot course, to' be understood that the normal position ot' putlogs is at right angles to the masonry wall and spaced equi-distant, as otherwise some of the sca'tloldY planking oit' other dimensions would not get a full bearing.y i Y )Vhile the above presents the invention in its preferred form it is to be remembered that slight modiiications and changes are contemplated, provided the saine tall within the spirit ot `the invention and the scope ofthe appended claims.

I claim:. l. A putlog comprising a supporting member, a clincher plateextending-therefrom and arranged tor insertion in avertical joint in a wall, there beinga recess in the lower edge ot said plate and locking 'means associated with said plate and slidable in said recess and adapted for insertion in' ahorizontal joint in a wall to 'facilitate the retention of said plate therein.l

2. A putlog .comprising a supporting member, a clincher plate extending there-- from and arranged for insertion in a vertical joint in a wall and means slidably borne by said plate and cooperating therewith 4to lock the piutlog, to a wall, said means 'having lat- Y i 11G V- Y eral portions extending beyond the vertical. plane of said plate for insertion in a horizontal joint in said Wall. v

3. A putlog comprisingy a Vsupporting member, a clincher plate extending therefrom and arranged for insertion in a vertical joint in a wall, there being a recess in the lower edge of said plate, and means slidably minnenV w. URMso'N.l

' arranged in said recess and cooperating with s

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