Патент USA US2409822код для вставки
Oct. 22, 1946.‘ ' MWALBRECHT. 2,409,821 VENETIAN BLIND Filed March 5, 1945 '37 27 / s 26 Aim/"megs " 2,409,821 PatentedOct. 22, ‘1946 UNITED'STATES PATENT OFFICE 2,409,821 VENETIAN BLIND Max W. Albrecht, Chicago, Ill. Application March 5, 1945, Serial No. 581,067 9 Claims. (01. 160—34) 2 1 This invention relates to a new and improved type of Venetian blind and more particularly to a Venetian blind which is normally closed. One of the objects of the invention is to provide a new and improved type of Venetian blind which normally assumes a closed position and may be readily adjusted to any predetermined open po sition. A further object of the invention is to provide a Venetian blind characterized by simplicity of 10 structure and ease of operation. An additional object of the invention is to pro vide a Venetian blind in which the cord or other ure é and to enclose or house the, operating mech anism hereinafter described. ‘ . j The entire top portion of the blind, including the cover 6, is carried on opposite sides by wall brackets ‘l and 8, which are fastened to the wall in any suitable manner, for instance, by means of screws, nails or the like. As will be under stood the invention is not limited to the use of any particular type of wall bracket. The principal parts of the operating mecha nism comprises a shaft 9 supported adjacent its ends by suitable brackets l0 and l I, Which in turn are fastened to the top of bar I by means of screws l 2 and I3, or in any other suitablermanner. means for opening the blind does not have to be Referring to Figure 3, it will be observed that adjusted at intervals as is usually necessary with 15 the bracket It! has the general shape illustrated the ordinary type of Venetian blind. and is provided with an opening ‘14 to permit the Still a further object of the invention is to pro insertion of a bearing l5,'which is held. in place vide a new and improved type of Venetian blind by a press ?t and by means of the ?anges I6 and characterized by a new and improved structure for fastening the tapes at the top of the blind. 20 Il (see Figure 1). The shaft 9 rotates freely in the bearing 15 and is surrounded by coil spring An additional object of the invention is to pro 18. One end 19 of‘ the coil spring 18 is fastened vide a new and improved Venetian blind so con in a hole 2!! in the shaft 9 and the other end 2| structed that the principal working parts at the of the spring I8 is inserted in any one‘of the top of the blind are enclosed in a housing Other objects and advantages of the invention 25 holes 22, 23, 24 or 25 in the bracket Ill. As will be understood, the tension of the spring l8 may will be apparent by reference to the following de be increased or decreased by moving the end 2| - scription in view of the accompanying drawing, to a different hole. , in which, The spring [8 functions to rotate the shaft 9 in Figure 1 represents an elevational View with ‘. parts broken away of a new and improved type 30 a clockwise direction when viewed from the right side of Figure 1. The tension on the spring 18 of Venetian blind provided in accordance with may be decreased by removing the end 2| from this invention; the hole 22 and inserting it in any one of the holes Figure 2 represents a sectional view taken along 23, 24 or 25. The least amount of tension being the line of 2-—2 of Figure 1; p ' exerted when the end 2! is inserted in the hole Figure 3 represents a sectional view taken 25. It will be understood that some other type‘ along the line 3—3 of Figure 1; of mechanical means may be provided to perform Figure 4 is a side or end view of the blind shown the same function without departing from the in Figure 1; invention. The provision of means for adjusting Figure 5 is a top or plan view of the ?gure ‘ shown in Figure 1 with the dotted line or cover 40 the tension on the spring 18 is desirable because the force required to automatically close the blind portion removed; as hereinafter described may vary somewhat de Figure 6 is an isometric view showing the man pending upon the size and shape of the blind ner in which the Venetian blind slats are locked and the weight of the slats. in open position; The shaft 9 is mounted on the righthand side Figure '7 illustrates the cover portion of the 423 in a bearing 26 supported in the bracket II. The blind shown with parts broken away in Figure 1; bearing 26 is similar to the bearing !!5 and is Figure 8 illustrates a portion of the guide sup held in the bracket I l in a similar manner. The porting elements for the cord as hereinafter deg movement of the shaft 9 in a lateral direction is prevented on one side by the spring I8 pressing The blind shown in Figure 1 comprises a top‘ against the shoulder ll of the bearing l5 and on bar I provided near the lower side thereof on the other side by a collar 2‘!- held in place by a each lateral side ‘with ?anged or projecting por set screw 23 or other suitable means. The collar tions 2 and 3 (see Figure 4) . The ?anged or pro 2'! is disposed closely adjacent to the shoulder 29 jecting portions 2 and 3 are formed in any suit of the bearing 26. The tapes 30 and 3! of the able manner, for example, if the bar is made of Venetian blind are mounted in a ?xed position wood a recess or channel is cut on opposite sides with respect to the shaft 9 by means of suitable of the bar at points 4 and 5. A cover 6 shown in fastening devices 32 and 33, which are of identi~ full in Figure 7 and with parts broken away in scribed. ‘ ' cal construction. As shown in Figure 21, the tape Figure 1 is adapted to sit on the ?anged portions 2 and 3 of the bar I in the manner shown in Fig (it) fastening device 32 comprises an upper plate-like , 2,409,821 member 34 and a lower plate-like member 35. A bolt or a pin 33 having one end threaded passes through the shaft 9 and suitable holes in the clamping plates 34 and 35 and is provided at the upper end with a wing nut 3t which, when 5 the passage of the cords 43 and 53. The supporting or top bar l is provided with screwed downwardly, presses against the top of relatively large rectangular openings 69 and 10 ing from the general principles of the invention. The slats 36 may be of the conventional type and are provided with openings 31 and 68 to permit the clamping element 33 and forces it in the shown in Fig. 5 through which openings descend direction of the clamping element 35. The end the tapes 30, 3| of the blind which are suspended 38 of the tape 30 is inserted between the clamping from the clamps 32, 33 and the cords 33, 53 which elements 33 and 35 on one side and the end 39 10 are employed for the purpose of raising and low— of the tape 40 is inserted between the same ering the blind. It will be seen that the rec clamping elements on the opposite side in the tangular openings shown in Fig. 5 are larger in manner illustrated in Figure 2, and thus the area than the tape fastening device 32 which, of tapes are held in a, clamped and fixed relation course,'will permit the tapes to descend vertically ship with respect to the shaft 3. Oneach side of the bolt 36 an opening Ill is provided in the lower clamping plate 35 to per mit the insertion of a novel type of supporting 15 downward through the rectangular openings, il lustrated in Fig. 5, without subjecting them to any crowding action which might result from passing them through slotted openings. element 32 for the cord 43, which serves to raise and lower the Venetian blind. The supporting element 42 comprises a thin strip of metal 33 Venetian blinds of the type herein described can be readily taken down for cleaning and, if desired, may be easily dismantled for the re orother suitable sheet material, which is initially placement of tapesand cords. To remove the out in the general shape of an O, as illustrated blind from the brackets l and 3, it is pulled in Figure 8, and provided with holes 45 and 46. outwardly. Thereafter it is a simple matter to The metal strip 44 is placed over the shaft 3 25 lift the topmember 6 ‘from the top bar I expos with the central opening 47 over the stud or bolt ing the operating mechanism as it appears in 36prior tothe assembly of the clamp 32 and the full lines in. Figures 1 to 6. The tapes can ends containing the holes 45 and 33 are bent then be readily removed by loosening the wing downwardly and fastened together by a suitable nuts 31 thereby loosening the clamps 32 and 33 means such as the stud v(it provided with head 30 and permitting the ends 38 and 39 of the tapes elements ~43and 50. As shown in Figure 2, the stud-48 has mounted thereon a pulley 5 l, which is free to move with the movement of the cord 43. The member 52 is similar in construction to the member 42 and in a similar manner serves to to be pulled outwardly. If it is desired to dis mantle the blind further, which would ordinarily be unnecessary except 'in the case of a major repair, the wing nuts 3'! can be removed entirely. It is then possible to lift oil the clamping ele guide the cord 53. The cords 33 and 53 pass ments 33 and 35 exposing the top of shaft 9. between transverse tapes 54, 55 and 55, 53 in a The end 2! of the spring l8 can then be dis conventional manner. As shown in Figure 1, the engaged from its slot and ‘the end I?! of the spring pulley supporting members 42 and 52 are prefer lB'oan be removed from the hole 23 in the shaft ably offset slightly with respect to the studs '36 40 9, the bolts 35 in the shaft ll can also then be to permit the cords 43 and 53 to pass centrally removed and the set screw 28 (see Figure 5) in between. the transverse tapes 54, 55 and 55, 51. the collar 2'? can be loosened. ‘The chain 6! The Venetian blind may be raised and lowered is removed from the slot 54 and the entire shaft ‘ by pulling on the double cord 53 which is a con will slide easily through the bearings l5 and 23. tinuation of cords 43 and 53. A‘conventional 45 The collar 2'! and the pulley supporting members type locking‘ member 59 is provided to hold the Hand 52 are readily removed from the end of blind in a raised position. the shaft. If necessary, the bearing members l5 On .the‘lefthand side of the shaft 9 a pulley and ‘26 may be removed by pulling them out. of 33 vis provided to which is fastened in any suitable the opening Ill in the shaft supporting elements manner-one end'of a chain 3!. As shown in 50 I0 and H . The Venetian blind is reassembled in Figure 6; the chain 3! isadapted to be held in the reverse order by passing the shaft 9 through a ?xed predetermined position by means of a the bearing member it, then placing the spring locking plate: 62, which is fastened to the top [8, the pulley supporting members .32 and 52 of the bar I by screws 33 (see Figure l) or in any and the collar 27 over the end of the shaft in suitable manner. The locking plate 62 has a 55 that order, thereafter inserting the bolts 33, ?x wedge-shaped. opening 33 and is relatively thin ing the spring iii in place in the manner already so that it will pass between beads 35 of the chain described, tightening the set screw 28 with the in the manner shown in Figure 6. Thus, when collar 2'! adjacent the bearing 26 and assembling the chain is pulled downwardly the'shaft 9 is the clamping members and tapes, as previously rotated in a counter-clockwise direction against 60 explained. ~ , the pressure of spring '58 and the slats 63 of the The Venetian blind structure of the type de Venetian blind are opened to any predetermined scribed herein has the advantage that the blind position and can beheld in that position by look automatically assumes a closed position when the ‘ing the chain Si in the opening. 33 of the locking chain or pull cord 5| is released. This arrange plate 32. When it is desired to close the'slats 65 ment overcomes one of the disadvantages of the of the blind,‘the chain 3! is pulled outwardly to type of Venetian blind now used wherein a double disengage it from the recess 64 of the locking pull cord is employed to open and. close the plate 62, the shaft 9 is then rotated in a clockwise slats.‘ The pull cords of the type customarily direction due to the action of the spring i3 and ' usedare ordinarily placed over a pulley and when. the slats of the blind are} automatically closed. ~ 70 pulled in one direction rotate a top bar to which It will be understood that the invention is not the tapes are attached to close the slats and limited to the particular type of device shown for in the other direction to open them. Thecord locking the slats of the blind in a predetermined often tends to slip so that one end of the cord open position, and that other variations may be becomes longer than the other making it impos-; I made in the structure described without depart 75 sible for a shorter person to reach the other end 2,409,821 5 6 means releasably associated with said last named means for holding the latter in a ?xed position the pull cord at frequent intervals, which is to cause said slats to remain in a predetermined inconvenient and sometimes rather difficult. open position irrespective of the force tending Furthermore, if the cord slips far enough, it is to urge them toward a closed position. not possible to close the blind without an adjust 5. A Venetian blind comprising a rotatable ment of the cord. The present invention elimi shaft, fastening means comprising two pair of nates these difficulties. clamping members ?xed to said shaft for detach Another feature of the invention resides in ably fastening the ends of slat supporting tapes, the provision of a structure in which the tapes that hold the slats are detachably fastened at 10 means operatively associated with said shaft for normally rotating it in a direction to cause said the top of the blind without the necessity for tapes automatically to move the slats supported using nails, as is customary in the usual type by said tapes toward a closed position, means op of Venetian blind. Moreover, the mounting of eratively associated With said shaft for rotating the tape clamps on a common shaft eliminates the need for one of the heavy top bars here 15 it to cause said tapes to move said slats to a pre determined open position, and means releasably tofore customarily employed in Venetian blind associated with said last named means for hold construction. ing the latter in a ?xed position to cause said slats Having thus described the invention, what I to remain in a predetermined open position irre claim as new and desire to secure by Letters Pat 20 spective of the force tending to urge them toward ent of the United States is: a ‘closed position. 1. A Venetian blind comprising a rotatable 6. A Venetian blind comprising a ?xed upper shaft, tape supporting means detachably fas supporting bar, a shaft rotatably supported from tened to said shaft for supporting the slats of said bar, fastening means ?xed to said shaft for the blind, means operatively associated with said shaft for normally rotating said shaft to move 25 fastening the ends of slat supporting tapes, means operatively associated with said shaft for nor said tapes with respect to each other to cause mally rotating said shaft in a direction to cause said slats automatically to assume a closed posi said tapes automatically to move the slats of said tion, means for rotating said shaft to cause said blind toward a closed position, means operatively tapes to move said slats to a predetermined open position, and means releasably associated with 30 associated with said shaft for rotating said shaft to cause said tapes to move said slats to a prede said last named means for holding said shaft termined open position and means releas-ably as against rotation when said slats are in said open sociated with said last named means for holding position whereby when said holding means is the latter in a ?xed position to cause said slats to released said shaft will rotate and said slats will 35 remain in a predetermined open position irre automatically assume a closed position. spective of the force tending to urge them toward 2. A Venetian blind comprising a rotatable a closed position, shaft, tape supporting means fastened to said '7. A Venetian blind comprising a ?xed upper shaft and extending transversely with respect to supporting bar .for the blind provided with holes the longitudinal axis thereof, a distance substan tialy equal to the front-to-rear spacing of a 40 for the passage of the upper ends of slat sup of the cord. As a result, it is necessary to adjust pair of Venetian blind tapes, said tape supporting porting tapes therethrough, a shaft rotatably sup ported on the top of said bar, fastening means means comprising a pair of clamping elements ?xed to said shaft for detachably fastening the for clamping the ends of said tapes, means for ends of said slat supporting tapes passing through holding said clamping elements in clamped re lationship with the ends of said Venetian blind 45 the holes in said ?xed bar, means operatively as sociated With said shaft for normally rotating tapes including means for releasing said clamp said shaft in a direction to cause said tapes auto ing elements for removal of said tapes, and means matically to move the slats supported by said for rotating said shaft to ‘cause said tapes to tapes toward a closed position, manually oper move vertically with respect to each other. 3. A Venetian blind comprising a rotatable 50 ated means associated with said shaft for rotat ing said shaft to cause said tapes to move said shaft, fastening means ?xed to said shaft for slats to a predetermined open position, and means detachably fastening the ends of slat supporting releasably associated with said last named means tapes, means operatively associated with said for holding the latter in a ?xed position to cause shaft for normally rotating it in a direction to cause said tapes automatically to move the 55 said slats to remain in a predetermined open po sition irrespective of the force tending to urge slats supported by said tapes toward a closed them toward a closed position. position, means operatively associated with said 8. A Venetian blind as claimed in claim 7 com shaft for rotating it to cause said tapes to move prising means supported from said shaft for said slats to a predetermined open position, and means releasably associated with said last named 60 guiding a Venetian blind cord through said holes in said bar. . means for holding the latter in a ?xed position 9. A Venetian blind comprising a ?xed upper to cause said slats to remain in a predetermined supporting bar for the blind provided with holes open position irrespective of the force tending for the passage of the upper ends of slat support to urge them toward a closed position. 4. A Venetian blind comprising a rotatable 65 ing tapes therethrough, ?anged portions extend ing outwardly from the sides of said bar adja shaft, fastening means ?xed to said shaft for de— cent the bottom thereof, an operating mechanism tachably fastening the ends of slat supporting for the Venetian blind mounted on the top of said tapes, spring means ‘operatively associated with bar and a housing seated on the said ?anged said shaft for normally rotating it in a direction to cause said tapes automatically to move the 70 portions enclosing the top and sides of said oper ating mechanism whereby when said blind is slats supported by said tapes toward a closed placed in wall brackets the operating mechanism ‘ position, means operatively associated with said is entirely enclosed. shaft for rotating it to cause said tapes to move said. slats to a predetermined open position, and MAX W. ALBRECHT.