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Publication numberUS2420301 A
Publication typeGrant
Publication dateMay 13, 1947
Filing dateNov 20, 1944
Priority dateNov 20, 1944
Publication numberUS 2420301 A, US 2420301A, US-A-2420301, US2420301 A, US2420301A
InventorsRudolph Cusumano
Original AssigneeRudolph Cusumano
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Venetian blind
US 2420301 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

May 13, 1947. R. CUSUMANO 2,420,301

VENETIAN BLIND Filed Nov. 20, 1944 2 Sheets-Sheet 2 INVENToR. Rudow/1 Cusumano .BY Mgg m A T7' ORNE Y Patented May 13, 1947 UNITED STATES PATENT oFElcE VENETIAN BLIND Rudolph Cusumano, Los Angeles, Calif.

Application November 20, 1944, Serial No. 564,231

4 Claims. (Cl. 160-34) My invention relates to Venetian blinds of the type well known as including a plurality of spaced slats supported in spaced relation by ladder tapes, the slats being raised and lowered by cables or cords. In all such blinds, the slats are held in any raised or lowered position by fastening the raising or lowering cord or cable on a suitable anchoring device usually attached to a window or door jamb or other structural part of a building. The objections to this necessity of manipulation are many, and chiey the time and trouble involved in loosening the raising and lowering cord or cable from its anchorage, operating the cord to eiect the elevation or descent of the slats and the wear and tear on the operating medium.

The objects of the present invention are to provide a Venetian blind in which the slats thereof maybe raised and lowered manually, Without the use of cords or cables and in which the slats may be retained in any adjusted position, Without locks or supplemental anchorage.

Another object of the invention is to provide in a Venetian blind, a means for counter-balancing the Weight of the blind in any raised or lowered position.

Another object of the invention is to provide in a Venetian blind a spring mechanism, providing tension by which the blind is held counterbalanced in any position between the limits of its movement and an adjustment by which such tension in the spring may be varied according to the weight of the blind.

My invention also has for its objects to pro'- vide such means that are positive in operation, convenient in use, easily installed in a Working position and easily disconnected therefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangement of parts, which will more fully appear in the course of the following description. However, the drawings merely show, and the following description merely describes embodiments of the invention which are given by way of illustration or example only.

In the drawings, like reference numerals designate similar parts in the several views.

Fig. l is an elevational view, partly in section of a device embodying my invention.

Fig. 2 is a top plan view.

Fig. 3 is an enlarged section on line 3 3 of Fig. 2.

Fig. 4 is a top plan View of a modied form of my invention.

Fig. 5 is a fragmentary elevational view showing the suspension means for the slats and Fig. 6 is a section on line 6 6 of Fig. 5.

In a general sense, the invention comprises a Venetian blind of usual structure, suitably suspended, as from the upper jamb of a door or a window or other opening, or from a housing that may be attached to the frame Work of a window or door. The slats are operable to raised or lowered position by rotatable or oscillatable means, to Which cables or cords are connected, and the rotatable means is under tension and furnished with means by which the tension may be regulated and adjusted in accordance With the Weight of the blind in any position oi its movement, so that the blind, when manually raised or lowered, will remain in such position without further aid.

In a specific sense, the invention is shown as comprising a casing or enclosure I0, open at the tcp. The enclosure which may be a structural part of a building, is provided with bottom openings, around which are positioned guide members or eyes II, secured to the floor I2 of the enclosure I0. Wire ropes or cables I3, secured to the bottom rail I4, Fig. 6, of the blind I5, pass through said guide members or eyes II and over pulleys I6, hung from the under side of cross bars I1, connecting the top of the sides of the enclosure. The ends of said wire ropes or cables I3, are secured to opposite sides of and in a cylindrical groove I8, that forms a part of a cone member I9, hereinafter more specially referred to. The Wire ropes or cables I3, pass through openings in the slats I2 0, of the blind I5, which comprises said slatsv 20, ladder tapes ZI, for supporting said slats 20 in spaced relation, and a bottom rail I4, to which the wire ropes or cables I 3 are attached in any convenient manner, whereby the rail I4 and consequently a portion of the slats 20 or all of them are held in raised or lowered position by the means detailed later herein. The tapes 2I, supporting the slats 20, are secured at the top to cylindrical carriers or elements 23, that are mounted or fixed upon a common shaft 24, at spaced points thereon. The shaft 24 operates in-bearings 25, and one end thereof is provided with a gear 25, in mesh with a worm 21, on a shaft 28, in and extending beyond the enclosure or housing I0. The extended end of said shaft 28, mounts a grooved pulley 29, or other means, over which extends preferably an endless line, or rope 30, which is operable by pulling on one or the other of the parallel portions thereof to tilt the slats 20 in one direction or another. The aforenamed cone member I9, which is journaled in a member I9 and in a bearing plate I9 is provided with a continuous spiral groove 3|, more clearly shown in Fig. 3, in which is arranged to thread an end portion of a block line 32, which is under tension, as of a spring 33. In the form shown in Fig. 1, the other end of the block line 32, is anchored as -suggestedat 34 and the intermediate portion of'the line or cable 32 passes over a pulley block connected to said spring 33 and pulley block` 36 ixedly secured in said housing I0 in spaced relation to said block- 35. In this manner, theejtielri;A

sion of the spring is reilected in the cone member I9 through the block line or cable 32;'-th'e cone member being rotated duringY themanual tionA oispeed inthe., elevation of 'the blind. aszit approaches its'top or uppermost position. Inr

drawing downthe blind, the blqclgline 32 rotates the'vconemember I9 in thelopposite directiQn,.as itunwindsrfrom the groovesSI, thereby .placing the4 sprite 33t-under. a progressively decreasing tension,` which, however, is at.V all timesproportionedv vequally `to the. Weight f @the blind. ,Thus

the Vblindmay be raised orlowered Yas desired, withl small, effort.v and, maintainedin Vadjusted position without any supplemental means..

The tensionlof the-spring .33, when .thesystem iscOnnected as eigplained, may. be, adjustedby anyy means; asa turnbllckle 3.1. Itis believed,y

Cl?. witfhllt further illustratisn. ,that .the Sim- Plfpflllsysof sbseres and 35....may .be mumerooved.OrothGrWSQQmDQunded.to ,exert greater .force'or.allelhqlal Qf motion, of the .block lije? and the. CQne-bedrl 9...,

The lor in, Fig- 4, differsfmmitheierm here tofo'rfe described, in theemplQyment of. ator7 sional spring 40,' contained .arid hQllSQd in the.. usual Ima'nneroa.conventionalspring typeloller L 511129211. .which are. @flanged to, Wind the vWire rolg'iesfofrA cablesconneoted with., the-bottom rail I 4;,"U,pon `'the shaft; is fixedlymounted an cone member")'If,v provided with an exterior continuousspiralgroove `,4Ii,.in and rfrom whichis adaptedto ivindorunwind a. cablev or, cord or other iieiiibleA means', .41',- that is tpaidout lfrom.o r wound upori'said`ro1l,er4I,.against `or by thetension of thE .SPIing All, The result attained by zthis form isi,practicallyidentical with the resultI attained by the,deviceshowninFigs 1 and 2.` Invthis latter form where `the wires orv cables .carrying the bottom rail .I4 aremounted .to v,wind on and oithedru'ms 4.4, itis, possible tovmount or at-` tach ythese Carrying wires to lthe outside ends-pt` bothrthe ,top and bottom. rails, as illustrated in Fig., 15a'lndthis arrangement leaves ,the slats rofr of ythe, lo1in:l fre ertobe removed .from the ladders ,Y or tapelsyzl. Where thetop and bottom rail :of alle',blindy .are exposed, .andtlie'-l bottom,frail2 is,im

` means A.co1'ine-cted,-viith Asaid rail vto opposite sides used to lift the blind, as it must be in the present instance, it is desirable to coat, cover or encase the wood or metal rail in a soil-proof material or in one from which stains, dirt and marks are easily removed. Such a cover, coat or case may be a plastic, as suggested at 48, in Fig. 6. Obviously, the lower rail I4 may be composed of plastic material. The upper rail 49, where exposed, as shown in Fig. 5, may constitute a tilt rail for tilting .the slats forwardly orrearwardly by any means.

It is believed clear without further illustration, lthat in this latter form of the invention, shown n,-I}`i g, 4, the bottom rail and the operating wires or cables may be housed to slide in Window or vdoor jambs, and-thus be invisible; also the tilting mechanism.heretofore referred to, may likewise behoused and only the operating member extenddin. convenient access to or reach of the operator.

Whilel :have .illustrated .and described what I nowfregardas the preferred:embodimentfof my irrvszintion,` theQnstruQtimis. 0I course. Subject., tomodieatonswithout.departing from the spirit.

assistere of my. invention.. I. therefore do not wishto ,restrictmyself.tothe particular form, .0.,f

coristrlitinillustrated.- and.; describe@ but d@-` sire to.availfmyselffof allymodifications that. may fell, .Withintlie Scene .of the appended-,Claims- Haring.. thus des-Qribemmy invention., what I. desire .to Secure. byLettsrsPatent lof. the United.

casing; a shaft journaled in saidcasing, spacedA cylindrical members iixed Von said shaft Ato .supp01*@ 4Said tapes: a Gone-shaped msm-ber rotatably mounted in saidecasing yand -having acylindrical el'OQye. and a, continuous, spiral groove; flexible.

of said cylindrical groove; a ,spring fastened yat oneendftosaidgcasing; andacable connected to andtensioned .by said spring, said cabley connected toA and operable fin, the ,spiral groove, of said member to regulate the tensionfofsaid spring in agzcorrla-nc with the .weight of -the lblindand means :to 1oscillate said shaft to cause the cylindricalmembers thereon to vary the angle .,ofsaid 2.-,*In la,I Venetian .blind including a plurality of slats; ladderV tapes upon-` which said.slats.ar,e supported and a bottom rail; Vthel.combination of a. cas,ing, yashaftjournaled in'l said casing and prollded Wthcylindricalmembers to supportcsaid tapes, la kgeaiyoriysaid (shaft, lmeanslengaging said geararld(manually` operable to oscillate said shaftand :tilt said'slats, Vafspirally groovedconefshaped body journaledgcentrallyiinsaidasing having a cylindrical. portionprovided with agroove, exiblefmeans connecting saidrail; andicylindrical groove, meansA .to cause said :bodyto .oscillate vas thefblind ,'is Araised .and .'loweredi'to wind said Iilexiblemeans onzandoff the spiralgrooye: including asprngxed ateone :endfto and inisaid casing, ablocli at the other fend orsaid'springfa sheave block xed in said casing, a line-tensionedfby said-,spring and threaded; over ,said blocks said line having one endxed V,to=..and;in saidcasing and-the other ,end anchored t0-said body insaid spiral groove, thereby tto goausefsaid .line to wind from and into said spiral.groove` rastheblind 'is raisedor .lowered land Vto .regulate the line.pul1

on said spring in accordance with the weightoi the blind, and means to adjust the tension of said spring.

3. In a Venetian blind including a plurality of slats, ladder tapes upon which said slats are supported and a bottom rail; the combination of a casing, a horizontal shaft journaled in said casing and provided with cylindrical means to support said tapes, a gear on one end of said shaft, a transversely disposed shaft journaled in and extending beyond said casing and provided with a Worm in engagement With said gear, a pulley on the end of said transverse shaft, exible means carried by said transverse shaft-pulley to tilt said slats, a single spirally grooved conoidal body journaled in said casing and provided With a cylindrical groove, exible means connecting said rail to said cylindrical groove, a spring fixed at one end to and in said casing, a block at the other end of said spring, a block xed in said casing, a line tensioned by said spring and threaded over said blocks, said line having one end i'lXed to and in said casing and the other end anchored to and in said spiral groove, thereby to regulate the line pull of said spring as the blind is raised and lowered, and an adjustment means in said casing for regulating the tension of said spring.

4. In a Venetian blind including a plurality of slats; ladder tapes upon which said slats are supported and a bottom rail; the combination of a casing, a shaft journaled in said casing, spaced cylindrical members xed on said shaft to support said tapes, a single conoidal body journaled in said casing having a cyilndrical portion provided with a groove and a continuous spiral groove, pulleys in said casing in line with said tapes and with the cylindrical groove of said body, flexible means threading over said pulleys and connecting said rail to opposite sides of said groove on the cylindrical portion, means to cause said conoidal body to oscillate and to alternately Wind said flexible means on and 01T said cylindrical groove as the blind is raised and lowered, comprising a line attached to said body in said spiral groove, a horizontal spring, anchored at one end toand in said casing and at the other end connected to said line to maintain said line in tension,.said spiral groove automatically adjusting the tension 0f said spring to the weight of the blind, means to regulate the tension of said spring, and independent manual means for operating said shaft to adjust the angle of said slats independently of said exible means.

RUDOLPH CUSUMANO.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 13,251 Bixler July 17, 1855 2,328,305 De Stefano Aug. 31, 1943 FOREIGN PATENTS Number Country Date 10,177 Great Britain July 13, 1888

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Classifications
U.S. Classification160/170, 160/192, 160/176.10R
International ClassificationE06B9/305, E06B9/28
Cooperative ClassificationE06B9/305
European ClassificationE06B9/305