US882397A - Metallic extension-screen. - Google Patents

Description

PATENTED MAR. 17, 1908. T. LIMOGE. METALLIC EXTENSION SCREEN.

APPLICATION FILED DBO 19 190e 2 SHEETS-SHEET Z.

VMON T.

ILL@

th 100 .and much- 'mgg me Ouer u the bop and 105 @n me: inn

bow

sheet 1 k comp ach screen 90?) non. mw o the and 1^ ion being .an

15W@ @mme/fe; m

45 blau;

reise, their top and bottom bers lyingT side by tact, es indicated nt E Fig. 2. in this oonstruction the principal function ot the clips is to hold togetherthe side tietjes of the top end bottoni trsnie bers oli the screen sections against lateral separntion. So loner as they are thus held together, the tongue and groove connection between them due to the engagement of the haternll)Y protrudiin,y corrugntions C on the otherwise flut-folded top and bottoni bars, will insure the even and msj; sliding movement of the sereen sections on one another.

The 'form and arrangement of the corrugations C permit them to be formed at one operation by pressure in e die. press after the parts of the trame have been completely assembled, this being' due to the fact that the)v laterally rotrude from one lince ol" the otherwise tint- 'olded traine bers between and parallel with the inner and outer edges of the seme. In this construction when the vtrame sections are fitted toellether the)Y ere put together faceside, and consequentlyY some retaining); de- Vices, such ns the clips above referred to, are indispensable to hold them together and prevent their lateral separation. T his construction of traine sections permits of the expeditious, eeonolnionl ano eiieient nininr'ncture and assembling' oli the ports o?" 'the screen.. The unbound edges of the Wire cloth end the ends ot the centeiron which binds its inner vertical edge are, Without oth r vfastening", see curely locked in plane by end duringT the nction of the press which at one operation closes the i'olds ot the bers t-igl'itly4 upon them, flattens and oonsolidetes the three trarne bars, end forms therein the corrug'etions 'C Which serve es the lool: to bold 'the wire cloth as Well ns the center iron Y which Aforms the fourth side or the freine. Eril that remains after this is to tit togeth Ar the two freine seotions andproperly,T bend over their clips i).

prefer to torni the end and top end bote torn bars ot each freine section integral of one continuous strip of sheet metal, the folds ofl which are so leid to ermit the subsequent ready insertion of the cloth un d "i eenteriron which binds its exposed edge. To secure this result i proceed es follows: i take e short strip ot" sheet nietu--prelerul)ly sheet stoel-oic s Width ide, when folded on itself longitudinnh trip of trie width dosired for the freine bers, und lonen enough to provide, When folded or bent transversely, en end bar and top end bottom bars ot' the length desired for tbe-freine bers. Such n sheet metal stri p is shown in el.

The central longitudinal line of told is im diceted by the dot-ted line i. The two sets of diagonal lines 2, 2, 3, 3, indicate the lines ot fold nt the two corners. At each corner, the longitudinal lines 2, 2, nre on opposite sides of the central line 1 and 'meet et n. point on that line, "forming with one another un obtuse angle. Similarly the di 'gourd lines are. on opposite sides ot 'the central. line l and form with one another en obtuse :ingle the apex of which meets in line i the spe); of the angle formed by the two line-s 2, -the four lines 2, 2, 3, 3, thus meetingT et :t common point in the line l, which point defines the outer end the corner in the folded traine. The bend along the angular lineI of told f2, Z, is inward in at direction opposite to that along the angulnr line of liold 3, 3, which is outward.

in Fig. 5 the strip is shown longitudinally 'folded along the center line l this beingl to show the tongues D (forming the olips hereinbet'ore referred to) which ton nies are punched out from the sheet nieta on one side of the central line l, at or neer each end of the strip along line 4 (Fig. e), and are thenl bent up, as shown. rThe outs 4, i do not eritend to the on ter edge of the strip, thus leeving intact the outer portion D hereiubefore referred to.

in Fig'. t5, the blank is partly folded and bent, in order to show more cleerttT how the folds nre int-tde and laid The ends of the top end bottom bers A lie between the folds of the, end bei* B; end the triangular pieces et each corner included on eeoh side of the eenter line i, between the lines 2, 3, are leid between the outer feces ot the top sind bottoni A and the interior opposite 'feces ot the folds of the end bar B, oleoriy indicated in the figure. The thus-folded strip, pressed down and llettened, is shown in ig.

represented es To complet-e the screen section, the wire cloth (with. its Hcenter iron7 binding) insorted between the folds of the soreen here troni Ythe open end et' the Yhren-ie end pushed book into pinne. will. be noted that the folds here been so leid in the freine, that there is no interior opposed edge obstruet the passage of the Creen Cloth *o ineet and eeh s oi the sind ends oli; the neuter iron heir proper iosition between tl'iefolds of the wire sloth and oenter iron beve been inserted into their plnee7 the screen freine is placed in a press by which its top and bottom bers and end bnr are corrugated :is elrendy described, these corrug-ations serving the several purposes hereinbefore mentioned. The soreen sections are vthen put together and the clip tongues D are bent over to hold the two together if desired, rivets may be en'iployed nt the corners, es indicated :it .1^ to hold the folds together more closely nt these points, do also the. end bars B of the screen sections, may be bent along their outer edges et right ongles to the body of the ber, as indicated :it c, Fig. l, to give the s'oreen wider end bearings, as well es to stiiien the bers. These {lange-like edges c ere folded haelt in sueh direction that earch will stond in the of lvlw top nud lmlltmn other mw-l10n, und will ngznnsl lurllwr unvurd ath of movemcut l'lmno hars nl lh@ thus wm :L stm) movement allor rh@ www hun` hmm vlvsxd to a predvlvminrfd rnxtfrrr. llfthou' 5mm@ such Stor), thv Servon Svclirfms might mmfinally they* 'would dum' apurl.

integral with lh@ shout mvtnl l'rzm'm lmrsl ,Wil/l1 whivh they :,lru assorlalrd.

und hvlll hvwlwn thv l'wlds olt lhu frame 'hars [l in thv hmm have which svc/urn the wir@ Clolh und lts (-mltvr 'mm h1 place hvtwcvn thv` c0111- prvssud folds of thev hmm` hars und servi? also :1s :1 lulurzxl lungh@ :md groove connection hul-www1 lhn wvvrlnpplllg sido faces 0l" Llw mp and lmltmn hars 0l" the frank, 5&0-- lluus., und vlipf,` l) for holding together tho frumv sm'llmns n dnius lad/oral snparutiou.

2. ln :1 uwtlllllf, vxtvnslon scrcn uompuscd ol smflluns sliding m1. one zulotlwr, wp und hmmm wallon fram(i hars ol" folded l. .ln :l metallic, ail-mxslon rjcrwn, lhrvn; mudo from Ono sided frame sections mach contluuoug stri? nl' mctul lungltuflmrlly folded upon its@ l :rnd than heut and foldod trnlnsversrly ol 115s length to lmm thv` bud bar B und fop and holtom lmrs .ll wire l l l l

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