US2614629A - Shade roller - Google Patents

Description

H. BLEIBTREU SHADE ROLLER Oct. 21, 1952 2 SHEETS-SHEET 1 Filed Jun 27, 1950 INVENTOR. wit? Oct. 21, 1952 BLElBTREu 2,614,629

SHADE ROLLER I I 2 SHEETS-SHEET 2 Filed June 27 1950 33 nvwszvron MW I " shaderoller and the mechanism;

Figs. 3, 4 and Patented 0a. 21, 1 952 i 2,614,629- a I SHADE ROLLER ,Hermann' Bleibtreu;-"Hinsdale; 111:, assignor to" Joanna-Western' Mills Company, a cormiration of Delaware r 7 Application Ju eau; 1950, 'se

' eomims, (o1. ltd- 297) "I l Q J v f i This invention relates to shad'e 'rollers,-.and has for its principal objects to simplify the. .con. struction, reduce'the number of parts. and the cost of manufacture, and to.=insure certainstable locking an adjusted position withquicltree lease -for readjustment. v I

Generally speaking, 1 this is accomplished replacing the familiar pawl'and ratchet mechaa nism 'with-a special' 'ball or tumbler clutch illus-v trated in the drawings, inwhich:

"Fig. l is a longitudinal section :Fig. 2 isa erspective view of thefiized shaft received within the hollow. end of the shade" roller andcooperating with the rewinding spring through the 7 fl 'Fig's. 3? 4, and5 arefrontelevation'and per-r v sp'e'cti've' {iiews'of'opposite sides of a clutch' 'ort tumbler. 'pla'tei forming partof' the mechanism! Figs; 6, 7, and 8 areldiagrams ofithe clutchmechanism showing'certain design limits that may give faulty locking likely to be followedby,

involuntary release; and F'igs. 9-13 are similar preferred design and illustrating-the correctness of the locking togetheriwiththe freedom'ior releases.v m v f1 The-familiar shaderollerindicated by ID is equipped with a customary spindle ll; and if'e'r rulefl l2rat the-right endin Fig. 1;

Adjacent to the left 'endfltheroller 1 ha s3 bore 13 provided with a reduced extension'l l. r

) The bore receives a'shaft. I6 (Fig.2) having its projecting tend'fiattened at' II to fit in the familiar 'formwall bracket by which the shaft-is made fast in a fixedposition;

c Theshaft 16 has a hollow cylindrical: portionl8' telescoped with a woodenpin l9 slotted I at the inner end 20 toreceive' the-.bent end portion 2:|i:'of"ahelic'al spring 22 the. outer endzof whichismade fast'to the outerend of the roller-"lll.

The-1 shaft V I6 "being fixed and the spring connectedbetween and acting between its inner end and the "outer'end of the shade roller, the spring acts to rotate the roller to raise theshade'from any selected lowerpositi'o 1 The-iner end of the wooden pin'20 fits into the reduced extension 14 0f the bore "I3 in the roller; p The-outer end of -the"roller"l0 is equipped with a familiar ferrule which substantially closes the end Qf-t'he shade roller and holds the "clutch;

mechanism; shaft; and spring in place;

a The sh'aft lfiis provided with a c indrica balljor tumbler race, 23 recessed at 247m opposite" places to provide'locking shoulders 25 to cooperate with ballsor-tumblers 26.

The end of the shade roller i0, is, equipped with a clutch plate or J tumbler, plate, shown in and indicated generally by 21. It includes a circular'flat port on 28 having studs 29 struck from it to'be drivendnto the end-ofv the shade roller and form a drivingmonnection between theplate and the roller., r

1 it} also has opposite eyes 30" struck thr'bugn which the outer convolution of the diagrams showing -the Neil 70,657

@ spring 22 is threadedzandmade. fas tr'by-bendin over against one of those eyes.

ment serves to connect: the outer. end: ofithe' This arran e-.

spring. to the. outer endi'of the shade; rollerthrough the clutch plate. 7

The. 'flat,, disk-like portion; 28: is; also provided with. a flange: or collar. 3| which surrounds;,jthe cylindrical portion of the shaft; just inwardly; of therace 2.3, and serves as a. bearing ,for: the; roller, on the shaft, v :v v

The clutch, plate 21: iswalso provided with s'paced-;1obes;32 projecting over the ballor-tum-, bler race.23.and cooperating with the .bal1,s,2;6.

Each lobe 32 is provided with a tumbler-lifting flank 33 and. a tumbler lockingflankfll spaced; circumferentially from the correspondinefl nks ofthe-other; v

Betweenthetwo flanks, each lobe has' a circular :wall 35 overlying the ?circum ference of; the ball or. tumbler race23- with-working clearance. -.In,the diagram shown in Fi -V J,: he, Par s, appear in spa position they assume as the shade; cord 3;;6 is drawn downwardly-to ljowertheishade; and-one of the'balls '26- is-being-pushedup-pver the race 23 by-theliiting-flank 33x31 the right Asqthe shade cord is pulled downwardly. from the position shown in Fig. 9, the parts proceed to :the positions shown in Fig; 10, v which the 1ifting-fiank33has, movedthe ball lfi'beyond the crest 3:! 'oi' the race, and it has run down-as, I indicated in thedotted line, to a position with r in the recess-24 betweenthelocking shoulder 25.

on the race and-thelocking fiank 34 ontheadjacent lobe 32. 1 g,

Ifthe downward movement of the shade cord 36 is continued from the. position shown in Fig. 10 through th'e position shown in'FigQll, the balls proceed to the position shown in; that figure- 1c t, if the pull theshade cord 36 inFig. 1Q isfrelaxed, the spring 22 will rotate thefshade roller clockwise, as indicated in Fig; 12;a'n dja ball 26 will be caught between the lockirigjflahk 34-and the locking shoulder 25 in asecure position, which will retain the shade until it,is purposely released.

The-release is accomplished by pulling thecord 36 down again and quickly slackening. it, with the result that the rewinding spring will spinlthe.

roller clockwise and by centrifugal force throw the ball 26 clear ofthe locking shoulder 25, as illustrated inFig'. 13. a n,

, Referring now to Figs. 6, 7, and 3, in which the fiank 33 is replaced by a lifting fianklll parallelto the locking flank 34 andjspaced from it. an effective distance'iless than that shown in Figs. 9 -12;: ,It will be observed that when the parts move from Fig. 6 totheYposition shown i Fig. 7,'th'e ban .26 g0ihg over the crest cream reach a position between the locking flanki l and the lockingf'shoulder 25, whenther'eis no room forit to properly seat in therecess 24 but is caught. infa labilevposition fromfwhich in; voluntary release may take place, u'p o n some slight vibration-caused by wind or footsteps,

Fig. a similar faulty locking position of one of the balls.

The faults of Figs. 6, 7, and s are completely l removed by the arrangement shown in Figs.-

td provide-a downwardlyl facing tumbler locking shoulder in an upper quarter, a tumbler on the I race, a shade roller telescoped over and rotatable locking flank 34 to insure that the ball 26 passing the crest 31, as shown in Fig. 10, will fall beyond the locking shoulder and enter the recess 24, as shown in Fig. 10, in time to effect the proper locking when the shade cord .is slack, as=illustrated in Fig; 12. I w I Thespacing indicated in Figs. 9-13 is more than required, but has. been found satisfactory in practice. 1 Tests with a transparent enlarged specimen having some lobescorre'sponding to those shown in Figs. 6, 7, and 8 demonstrated a need for spacingcorresponding to that shown in Figs..9-13,'

and it was found advantageous to make the about the shaft, a rewinding spring connected to and acting between the shaft and the roller, a tumbler plate fast to the roller, and a tumbler v lifting shoulder and a tumbler locking shoulder formed on .7 the tumbler plate and overlapping the race with the tumbler between them, said lifting flank 33 substantially radial. The lock- 7 ing flank 34 was retained in the inclinedposition with respect'to' a ra-dius to better insure the locking relation shown inFig. 12 and prevent elastic reboundfromeffecting an involuntary'release, but the incline shown is not indispensable.

Tests with the same specimen indicated that with the flattened portiondlarranged to hold the shaft with the diameter through its longer dimension in a-vertical' position, arranging the locking shoulders 25 at degrees to thatdiameterincreased the ease with which the. balls 26 would be released-and centrifugallyejected beyond the locking-shoulder, but that position rod [9 byeither crimping or a spline.

" The clutch plate 28 is readily formed up from sheet metal strips, either low carbon galvanized stee'lfor spring'steel. Specimens of theformer have withstood 20,000 operations without showing appreciablewear,"

If'cla'imz I f 1. In a shade roller mechai'i'is' of the class described, 'a shaft having means"; for fixing it in axially horizontal position, a tumbler race onthe shaft having an upper crest'andrecessed toprovide a downwardly facing tumbler locking shoulder substantially midway of an upper quarter, a tumbler on therace, a-shade roller telescoped over and rotatable about the shaft, a

rewinding spring connected to and-jactingbetween the shaft and theroller, 'a tumbler plate fast to the roller, and spaced lobes, on the tumbler plate overlapping the tumbler race,- each presenting to the tumbler a lifting and a' locking fiankfthe locking-flank of 'each lobe being spaced from the liftingIflank'of the other lobe more than the tumbler locking shoulder isfspaced from said upper crest of the'tumbler race.

2. In' a shade roller mechanism of the class described, a shaft having meansfor' fixing it in axially horizontal, position, a""tunjlbler" race on the shaft having an upper 1crest "and recessed tumbler plate shoulders being spaced circumferentially farther apart than the spacing between theupper crest, and the downwardly facing locking shoulder on the tumbler'race. v

.3. In a shade roller mechanism-of the' class described, a shaft having, means for fixing it in axially horizontal position, a tumbler race on the shaft having an upper crest and recessed to provide a downwardly facing tumbler locklngshoulder in an upper quarter, .a tumbler on the race, a shade roller telescoped over {and rotatable about the shaftja rewinding spring connectedto and acting-between theshaftand the roller, a tumbler plate fast to the roller, and a tumbler lifting shoulder and a tumbler locking shoulder formed on the .tumblenplate and, overlapping the race withv the tumbler between them, said tumbler plate shoulders'beingspaced;angularly farther apart than the angular spacing between the upper crest and. the downwardly facing locking shoulder on the tumbler race.

. 4..In a shade roller mechanism of the class described, a shaft havingmeans for. fixingit in axially horizontal positiom a tumblerpraceqon thei-shaft having, an upper. crest and recessed belowthe crest to provide a, downwardly facing tumbler locking shoulder, a tumbleron the race,

a shade roller telescoped over and rotatableabout the shaft, a rewinding. spring connected to and acting between, the :shaft and theroller, and a tumbler plate fast to the roller and having a tumbler lifting .shoulderand a tumbler locking shoulder overlapping the 'race with the tumbler between them, the tumbler. plate locking shoulder supporting the tumbler in the tumbler race recess beneath the downwardly facing shoulder thereof when the tumbler dropsfromthe crest in response to movement:.-imparted. by the :lifting shoulden,

. 5'. The combination claimed in claimcl, in which th angle of the tumbler plate locking shoulder relativeto the radius of the shaft moves the tumbler intherecess intoflocking engagement between said shoulder and the downwardly facing shoulderof the race upon rewinding rotation of the roller. 1

6 The combinationclaimed in claim 4, in which the angle,of --.the. tumbler plate locking shoulder relative to the radius of the shaft moves REFERENCES oiran The'following references are of record in the.

i of h [patent UNITED s'rA TEs PATENTS Number P? Name Y Date 1,013,532 Carmany Jan. 2, 1912 1,019,653 Kaiserm'an Mar; 5, 1912

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