US1797204A - Roller blind and fitting therefor - Google Patents

Description

Mal'h 17, 1931 w. J. HADDEN 1,797,204

ROLLER BLIND AND FITTTNG THEREFOR Filed Sept. 24, 1927 ,UNITED j sA'res PAT-ENT OFFICE@ oo'rLAND, AssIGNoR To DoNAVIDsoN ivIANU- i tory "in use, but it is foundY inpr'actice that Patented Mar. 17, k1931 XVLLIAM J TIADDEN, -O7F GLASGOW, `S

FACTURING COMPANY LIMIYITED, `01E"GrLASGrCXT, SCOTLAND i BoLLnR BLIND AND FITTNG 'rHEREFon Application. filed Septemberrr24, 1927, Serial No VThis invention relates to roller blinds of the type including means (suoli, for instance,

' asa ratchet Wheel heldrto the blind roller -byk friction) for permitting the blind to belowered4 to and held in different positions while saidY means is held stationary, and refers also to vthe fittings for said roller'blin'ds. c

`Infmy,prior ULS. specifications Serial Nos.

190,326 and 203,145 there is described aroller blind ofthe above specified type provided,

itis not absolutely fool-proof, because, if the saidcord retracting means is rotated in the wrongdirection, due to some error in assembly, the coil spring may .be broken.

'The object of the vpresent'invention is to overcome thisdefectjandto provide an arspring which .35 eans isrotated inja direction to.Y

randement which While bein-g cheap andeasily assembled will be absolutely fool-proof` To this end.,` the present invention is characterized by anchoring means for the coil is `so'arranged that When the retracting j l i raise the blind by 'the cord,'thecoilsprng anchoringy means is stationary,vbut when'v the retracting/.means Vis rotated. in the opposite direction, thesaid anchoring means can -rotatev therewith. :This can be obtainedl by using a` one-Way clutch device, such `as a n ratchet and pawl.

A further object of this invention is to provide an improved manner of anchoring one end ofy the coil spring to the sleeve, 1and Y to this end, the sleeve is provided with two slots eiitend'in'gas chords across "one en dface ofthe sleeves,saidslots being mutually perpendicular to Y each' other and serving to receive vone end `oftheV spring. l

. 221,654, `and 'in Greatrrifain August 31, 1927.

AReferring .toY the drawings Fig. l is' ar longitudinal vsectional elevation ment in which there' areV raising' meansVv at both ends. y n V FigL2 is a similar view of -one end of the roller only, drawn to 'an enlarged scale.;V

`Fig. Sis a sectional viewon the line 3-3 in Fig. 2. y

Fig.v 2.V

Fig. 4 is a sectional view' on line 4-4 in vof the blind roller, illustrating' an embodi- Fig. 5is an end view of one part removedshowing the `improved manner of anchoring one end of the spring. j l n j In the practical embodiment shown in the drawings the roller l to which the blind (not shown) vis fixed, may be of any lusual fornn The endniembersare vconstructed as separate fittings each of 'which comprise awclrcular'flanged disc 5' engaging and fixed by screws 4 to the proximate end vof the roller Yand anaxiallyextending ournal which is formed with a shoulder .6 between its end andthe disc and is screwedattsend 7. VV.On this journal there is aloosely mounted ratchet Wheel l'vvhic'h vis frictionally clutched to 'the j journal by aspring 'washer ll located between the s houlder anda disc washer ,12. incontact with vthe ratchet wheel 13. A cord Vdrum of the ratchet wheel, in Contact with the'side and 'being provided withtwo oppositely extending cylindrical yflanges 16, 17 ,Within which there is iitted'discrings 18 19, the one 19 at the outer yend being removable. {Between thek .drum vandthe inner disc ring 18 there is mounted a number of, say three, pawls 20 rockableonrivets2l extending between the said drum flange and disc ring, and adapted to engage :With the ratchet Wheel.

lithintheV outerflanged-part l7-and rotatab'lymo'unted on` thefsleeve-nut 1`5fis a sleeve l22 between whichV and the said flanged part is located'a coil yspring 23 anchored to the twofparts.,Y yOne end 24 ofthespring '23 is passed through slots (noty shown) in the flanged parts 17y and the other end 26 -is passed through the slots 27--28`inthe sleevev part 22.

la .is located on the journal at the outer side h thereof, this drumfbeing rotatably mounted i' on a sleeve nut l5 s'crewed'upon the-journal f se .v

ers can be adjusted.

on the outside of the disc ring 19 co-operat-v ing with a pawl 29. This end fitting is also enclosed in a two part cover 30, 31,- one part of which carries the pivot 32 of the pawl 29 and this part also carries a bearing spindle V34 which projects within the sleeve nut 15.

' The cord 35 which is adapted to wind around the part between the drum flanges, is secured at-oneend by passing itv through a hole 37 in one flange and knotting this end of the cord. The other end of the cord passes through a hole 38 inthe cover part 30 and is preferably provided with a tassel 39 or other similar device.

The ratchet wheel 25 and pawl 29 constitute a one-way clutch device so arranged that when the drum is rotated in a direction to raise the blind the ratchet wheel 25 and the sleeve part 22 are held stationary by the engagement of the pawl 29 with the ratchet wheel 25 yso that the coil spring is tightened but when the drum is rotated in the opposite direction the ratchet wheel 25 can trip the pawl 29 androtates with the drum.

'A The two part covers v30, 31 are made to fit detachably together so that the end fittings can be inspected and parts thereof adjusted, removed, changed and replaced. /These covers are provided with apertured Alugs l0 by which they can Vbe iixed to the window fra1ne.` Y 1 n The sleeve nut 15 can be moved by screwing.V it more or lessv on to the journal and by this means-the tension ofthe springfwash- A grub screw 47 is provided in the sleeve nut, which when screwed aga-inst the journalserves to loclrthe sleeve nut in its adjusted position. v- By removing the covers, the sleeve 4vnuts and Vother lparts Y can be readily adjusted, removedand changed or replaced. Y Y

Whereas, in the construction illustrated, the blind is provided at both ends with raising means, the two end members are of identical constructionexcept that, the journal, sleeve nut and grub screw at the righthand end. are provided with left hand threads and the same parts at the left hand end are pro vided` with right hand threads toV prevent these parts from unscrewing by the operation of the blinds. Vhere raising means is provided at one end only of the roller, means such as that described in my U. S.v specification Serial Number 190,326 will be provided at the opposite end of the roller for holding the blind against downward movement by friction.

It will be understood that considerable alteration can be made in the iittings without departing from the spirit of this invention.

I claim l. A. roller blind having, a roller, a cord drumy for rotating said roller to raise the blind, means for normally holding said cord drum stationary, means for holding said cord drum to the roller by friction, for permitting the blind to be lowered to-and held in different positions while it is stationary, a coil spring on said cord drum, a sleeve part having two slots extending as chords across one end thereof and located mutually perpendicularV to each other adapted to re ceive and anchor one end of said spring and means for holding said sleeve part stationary so that the spring is wound up when the drum is rotated to raise the blind whereby the cord drum is thereafter returned to its initial position unidirectional clutching means for rendering said spring effective for said return only when the cord drum is moved in a direction to raise the blind.

j 2. A roller blind comprising, a roller, having at each end thereof a journal with a shoulder, a ratchet wheel rotatably mounted on said journal, means between said shoulder and ratchet Wheel Yfor frictionally holding said ratchet wheel to said'` journal, a cord drum rotatably mounted at the other sideA of the ratchet wheel, a cord ony said drum adapted to rotate said roller for raising the blind, pawls on said drum engaging said vratchet wheel, a casing enclosing said journal and'its associatedv Yparts at one end, a coil spring secured at one end to said drum, ratchet and lpawl anchoring means for the opposite end of said-spring, adapted to be held stationary when said cord drum is rotated to raise the roller so as to cause said spring to return the cord drum to its initial position relatively to the casing whereby thevcordis retracted to its initial position but allow the spring and anchoring means to rotate freely with the drum when the latter is rotated in an opposite direction and means for adjusting said'friction holding means.

3. A roller blind comprising, a roller having aty each` end thereof a journal withV a shoulder, aratchet wheel rotatably mounted on said journal, aY spring washer between said shoulder and said ratchet wheel for holding said wheel to the journal by friction for permitting Vthe blind to be lowered to and held in different positions while. the ratchet wheel is stationary, adrum rotatably mounted at the side of the ratchet wheel, a cord for rotating the drum, pawls on said drum engaging said ratchet wheel adapted to cause` the drum when moved in one direction to rotate the journal while permitting it to move ica ` 6. A roller blind having a roller andend in the Vopposite direction independently of said journal, a bearing fixed relative to said journal,` a coil spring between said fixed bearing and said drum and ratchet and pawl y position downward movement of the blind being checked at one end while vthe raising means at the other end is ybeing operated.

'4. The combination with a roller blind having, a roller, means for restraining movement yof the roller for lowering the .blind but allowing free movement of the roller for raising the blind, roller rotating 'meansr adapted when moved in one direction to rotate the roller for raising the blind'but when moved in the other direction to rotate independently of the said roller, resilient means adapted to return said roller rotating. means to its initial position after it has been moved f y.of unidirectionalV clutching means for'rento raise the blind into the required position,

dering said resilient means effective for said return only when the roller rotating means is moved in a directionto raise the blind. u

5. The combination with a roller blind having, a roller,means for restraining movement of the roller for lowering the blind but allowing free movement of the roller. for raisy lor 'moved in one direction to rotate the roller for raising the blind but when moved in theother direction to rotate lindependently of the said roller, a springvhavingone end attached to said cord'druni and being adapted to return Lthe cord drum to its initial position after it has been rotated to raise the blind into the required position byV a pull on said i i cord, of a ratchet Wheel freely pivoted relaf drum and in engagement with said ratchet Y f fittings at end of said spring is attached, and at least one pawlstationarily pivoted relative to said cord wheel, wherebysaid spring isv eii'ective for said return only when the cord drum is iof tated in a direction to raise the blind'.

each end therefor :each end fitting" comprising, a journalfiX'edto said `roller, a ratchet wheel rotatably mounted onsaidjournal, means for frictionally holding said vratchet wheel to said journal, a drumrotatably mounted on said journal, aA cord for rotating the drum, pawls on said drum kengaging said ratchet wheel, adapted v4when the drum is rotated by the-cord to rotate the roller, but allow the drum to rotate inthe opposite direction independently of said roll-V er, a casing adapted to belfixed to the window, f

a. coil spring secured at one end to said drum, a freely mounted ratchet towhich the other end of said coil spring is secured, and a fixed pawl co-operating with said ratchet, whereby the ratchet and the end of the spring secured thereto is adapted to be free to move with the druin` in one direction b-ut is heldstationary when the drum is Arotatedto'raise the blind so as to returnthe cord drum` to its initial position relatively tothe casing whereby the cord is retracted to its initialpositionyand means on the cord cooperating with said casing to act as a stop thereby retaining the cord drum inV its initial position whereby the blind can be lowered by beingpulled down andcan be raised by pulling vthe cord at either endof' the roller, downward movement of the blind beingcchecked at one end while the raising means at theother end i'sbeing operated. I

' In testimony whereof I affix my signature.

WILLIAM JAMES HADDEN.

ving the blind, a cord drum adapted when tive to saidcord drum and to which the other

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