US2329415A - Scaffold - Google Patents

Description

w. G. OSBORNE- 2,329,415

SCAFFOLD Filed Feb. 19, 1943 Sept. 14, 1943.

Y. l vokoaon o ooonuc Patented Sept. 14, 1943 r I UNITED v PATENT orrics j a f2,329,415 I t seamen!) v t l iwiniamonsbtme, sandman-nit. n hpplloiition Februdry s, 1943, Serial No. itGiQI-fl it (c gar- 20,) V

-My=inven tionrelatesto a scafiold anii theprin fclpal-obj ect "is'to provide scaffold that is adapted to be mounted upon roofs *of different --*pithes. nn important-use'of the present inventionis for *use upon "the curved roofs of aircraft hangars'. adaptabilityo'f the present'device p'ern'iitsiit to "be used uponavariety of pitches froi'nsiibstantiallya vertical-surface to a" surfacefhaving "a'sharplyacute angle to'the horizontal; U

My invention also has for its objects topiovide euch means that are positive in operation; convenien't'in use, easily instalie'd'in-aworking "position and easily disconnected therefrom, eco n'omicai'of manufacture, relatively simple, and of generai superiority and serviceability. I

The invention also comprises novel details of construction and novel combinations and farrangements of'parts, which willm'ore fully appear -inthe course of the following-description, However, the drawing merely shows "and the renew; in'g description merely describes "embodiments of the present invention, which aregiven by way ofillustration orexample only. i i In the drawing, like reference characters I desi'gna'tesimiiar parts in the severalfviews; 1v Fig. 1 is a'perspecti-ve viewof animbodiment "6f my in-vention. .7 *Fl'g. 2 i an enlarged side elevation of 'said em- "bod'im'ent showingsame mounted in 'position.

Fig. 3 is a fragmentary-view looking in th'e direction of arrow-AdfFigLZ. i

Fig.4 is an'enlarged sectlon'taken-on line 4-4 tings-2. v m "Fig. '5 is a perspective view of an elementicomprised in said embodiment. J Fl'g. '6 is a modified-construction of theipresent jnvefltign. Y I I i Referring more in detail to the' drawin'gf,vthe reference numerals und e designate upstanding members of my scaffold. The lower portions of The upper portions of members I and 8 have U-shaped clamps I6 and I1 for removably clamping cross bars l8 and I9, to provide a rearward guard for men working on the present scaffold.

Bolts 20 and 2| removably clamp the bars I8 and IS in position. A foot-board 22 is suitably bolted to the upstanding members I and 8 adjacent the rear edge of platform 23.

The platform 23 is supported upon a triangular orthree-s'ided member having un -uprig t m berm-and a"therewith-anguiariydisposed memj:

' ber 25, which isreallythe hypotenuse of "the rig"-l1t*angled triangle; The *menibers 14 and *15 together support the *cross member "1P6; 'rwh'ich in turnsupports the platform fl. *oiiter endo f -th'e cross member 2'6 i carries a foo't 41 which 1s fastened "to the inclined surface "'28 by means of a spike or mail "'29: 'It is believed 'clear without further illustration "that the fo'ot 2*! may "be'piv- The opening in the foot 21 for thehpike or nail 'ifl maybe of i-nverted'key-hole shape;-Whereby the spike 29 may be -iirst';driven "into the surface 28. Then the --erilarged port-ionof th'e'openare 31* may be placed overthe "head of the spike 2'9 "and as the foot 1-! settles down, the reduced portion of the -'opening engages the shank of thespi-ke or nail 19 The open-ing -i4 -is also'pre'b' erably of the' same {inverted key-hole "shape so that the spikeor mail 15 likewise may-be first driven into the surface '28 and the foot 1-3 When placed'thereover and allowedto'sttle down until the narrowest-part of the opening l 4 engages the shank-ofthespike l5.

' A clipifl has' 'leg portionsf'34ilthat'are welded at oppsitesides'of a corner prOVide'd by thepn- 'gularly arranged members 24 and 26. The -clip 33 has opposed--openings 36 that -ma-y be aligned with openings fl in the upstanding members l and 8. fBolts 36 are passed 'through=-the aIigneti openin'gsand have {nuts 31 holding the bolts in place.

A lower clip fl 'has leg's fl'weld'ed at opposite 'sid'es of the corner provided by adjacent ends or an'gularly arranged"mem'bers fl -andfli Opposed openings-*ioarje arranged to be placed-"opposite selectedori'esrof the openings in, 13mm 41 are passe'dthrough the aligned openings, with suitable nuts 41 holdingthe bolts in position. v

' Forkedmembersfl have pivotal connections 43 with braces 44. ,Feet 45 at the outer ends of the braces may be fastened to the surface 28 by means of nails 46.

In the formshown in Fig. 6, bracing links 48 preferably pivotally connect with the lower ends of the upstanding members I and 8, as shown at 49 and pivotally connect with-the feet l3, as indicated at 50. With the exception of the bracing links 48 and the'f eet 5| being pivotally connected at 30 to the cross bars 26, and having two spikes or nails, the construction shown in Fig. 6 is similar to that previously described. The modification shown in Fig. 6, may be used on either a substantially vertical surface (as shown in full lines) i or on an inclined surface (as indicated in broken lines in Fig. 6).

In the use of my said invention, the spikes or nails I and 29 are driven in the side of the roof 28 or other place where the present scaffold is to be used. The distance between the narrow portions of the slots I4 and 32 is known, so that these spikes may be properly placed. Then the larger portions of the openings i4 and 3 I are placed over the spikes or nails l5 and 29 respectively, and the feet 13 and 21 thereupon settle down with the shanks of the spikes in the narrower portions of the openings. then nailed to the surface in between the previously mentioned spikes or nails, as suggested at 46. The platform 23 provides a satisfactoryland safe working position for a workman, with the bars I8, is and 22 acting as guards.

When it is decided to move the present scaffold to another roof of a different pitch or to another part of the same roof, that has a different pitch, the nails are first removed, The scaf- The feet 45 of the braces 44 are fold is then lifted down by reversing the aforeinvention, the constructions are, of course, subject to modifications without departing from the spirit and scope of my invention. I, therefore, do not wish to restrict myself to the particular forms of construction illustrated and described,

butdesire to avail myself of all modifications that may fall within the scope of the appended claims.

Having thus described my invention, what; I 1

claimand desire to secure by .Letters Patent is:

1. In a scaffold, upstanding means, normal ly substantially horizontal platform-supporting means extending outwardly from the upstanding means, the supporting means being slidable up and down the upstanding means, pivotal connections at the lower end of the upstanding means and at the outer end of the supporting means for connecting with different'pitches of surfaces, said upstanding means having rigidly extending forks between said pivotal I connections, divergent braces, each having a pivotal connection with one of said forks and having means at its outer'end to be fastened to the surface upon which the scaffold is mounted, between; the said pivotal connections of the upstanding means and said supporting means. a I l 2. In a scaffold, the combinationof upstanding means, triangular supporting means mounted to slide up and down on the upstanding means to engage different pitches of surfaces, a side of the triangular support being arranged substantially horizontally for the support of a platform, headed nails adapted .to be driven into different pitches of surfaces upon which the scaffold is mounted, a substantially flat side on the triangular supporting means being arranged to be opposite such surfaces, and pivoted feet on the lower I end of the upstanding means and on the outer end of the platform support, said feet being provided with openings large enough to be passed over the heads of the nails, and the openings having reduced upper portions smaller than the heads of the nails respectively, but large enough to admit the shanks of the nails to receive such shanks when the feet settle down upon the nails.

3. In a scaffold, upstanding means, triangular supporting means mounted to slide up and down on the upstanding means to engage different pitches of surfaces, a side of thettrian gular supportbeing arranged substantially horizontally for the "support of a platform, the support havinga non-pivotal connection with the upstanding means, a pivoted foot on the outer end of said platform support, and a link connecting another pivoted foot with alowerportion of the upstanding means; to maintainthe scaffold in a desired position- I .7 r p 4.A scaffold including an upright supporting member-,a platform supporting framehorizontally outstanding from said member and vertically adjustably connectedthereto having a pivoted foot at its outer end, a link pivotally con nected to the lower portion of said member below the frame and having a pivoted foot at its outer end, the link and frame being in such relative proportions as topermit alignment of their said pivoted feet along lines vertically parallel with .the upright member and at various angles inclined with respect to saidupright. y

5. A scaffold including an uprightsupporting mbe a .n f m s o t n r me i i tally outstanding from said member and-vertipally adjustably connected thereto having aLpivoted foot at its outer end, a link pivotallycon nected to the lower portion of said member below the frameand' having a pivoted foot at its outer end, andbraces piv allyw nec d o d ou standing from the .uDright memberat an inter mediate point thereof and having attaching members at their outer ends, the frame links braces being shiftable to points aligning the'pivoted feet and attaching members thereot verticallyparallel with the upright memberand at various angles inclined with respect to said upright member...

' i WILLIAM G. OSBORNK,

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