US2161414A - Venetian blind head bar - Google Patents

Description

June 6,.1939. Y $,HAMMER 2,161,414

' v'ENETIAN BLIND'HEAD BAR Filed ccp 17, 1956 5 sheets-snaai' 1 4 INVENTOR Samul Hammer Fig-.1* 5,

ATTORNEYS June 6, 1939. s. HAMMER VENETIAN BLIND HEAD BAR Filed Oct. 17, 1936 5 Sheets-Sheet 2 INVENTOR. Samuel I/czrnfne/1 @M4/ ATTORNEYS June 6, 1939. s. HAMMER VENETIAN BLIND HEAD BAR Filed oct. 1v, i936 5 Shadi-Sheet 5 INVENTOR. Samuel Hammer' 53pm/J im ATTORNEYS June', 1939. s 'HAMMER 2,161,414

VENETIAN BLIND HEAD BAR Filed oct. 17,1936 5 sheets-sheet 4A 'Ff-1E' e 'F-LE-.ls

INVENTOR. Samuel Hammer' MM/4 M2 ATTORNEYS June 6., 1939.

S. HAMMER VENETIAN BLIND HEAD BAR Filed Oct. 17, 1936 5 Sheets-Sheet 5 INVENTOR.

Samuel Hamme/1 *BY @mw am ATTORNEYS Patented June 6, 1939 VENETIAN BLIND HEAD BAR Samuel Hammer, Brooklyn, N. Y., assignor to United Metal Box Co., Inc., Brooklyn, N. Y., a corporation of New York applicati-m october '17, 193s, serial No. 106,096

13 Claims.

This invention relates to Venetian blinds for windows, and the object is to improve the head bar construction; the slat tilting and locking mechanism; the construction of the housings for lthe tilting and locking mechanisms; and to provide a construction'in which the housings are assembled nn and supported by the head bar by telescoping the housings into the head bar. Also to provide a tilting mechanism which will retain the slats at adjusted angles; ahead bar construction which will provide the maximum spread of blind slats and minimum exposure of working parts; a construction which will permit assembly ofthe parts without welding, soldering, riveting l5 or bolting; a structure which will permit assembly of the parts either at the place of manufacture or place of installation; a structure which will permit complete assembly of head bar, tilting and locking mechanism housings, slats, tilting and e1evating cords preparatory to'hanging on supporting brackets and permitting nal adjustment and locking of the head bar and suspended slats in adjusted position within the sides ,of a window casing without disturbing or rearranging the assembly of parts; and generally to provide a structureof smooth and finished appearance.

My invention is illustrated in the accompanying drawings in which l Figure 1 is an elevation showing a window casing with the improved blind in position and showing particularly the location of the head or supl porting bar with respect to the window casing and the spread of the blindslats between the upright members of the casing.

Figure 2 is an enlarged front elevation of the head bar, supporting brackets, tilting slat and slats suspended therefrom to show the complete assembly, part of the lowermost slat being in section to show a detail of the construction.

Figure 3 is an enlarged plan View of one end of the lowermost slat showing the anchor for the elevating cord. y

Figure 4 is a top plan view and partial section of thev head bar and supporting brackets.

Figure 5 and 6 are vertical cross-sections on the lines 5-5 and 6 6, respectively, of Figure 4.

Figure '7 is a side e1evation of the slat tilting mechanism with partof the housing removed and the tilting gear segment shown in dotted lines in 50 tilted position. A

Figure 8 is a vertical section on the line 8-8 oi' Figure 7. v

Figure 9' is a perspective view of the head bar and housings illustrating the mode o1' assembly 55 and the manner of supporting the housings within the head bar by telescoping the housings into the head bar.

Figure 10 is a side e1evation of the housing for the locking mechanism.

Figure 1l is a plan view ofthe single plate 5 stamping before bending into shape which constitutes the entire locking mechanism housing.

Figure 12 is an e1evation illustrating the suspension for blinds of extra width and showing a central support for the tilting slat.

Figures 13 and Mare enlarged vertical crosssections on the lines I3-I3 and I4-I4, respectively, of Figure 12.

Referring to the drawings, and more particularly to Figure 1, a window is illustrated having 15 a casing comprising the usual sill I, side frames 2 and 3, top rail 4, and sash 5. The Venetian blind is indicated by slats 6, suspended by elevating cords 1 from a head bar 8 which is mounted on brackets 9; the slats 6 being also suspended from 20 the tilting bar or slat IU by tilting and suspension tapes II. Tilting cords I2 are attached to a tilting mechanism carried by housing I3, Elevating cord guides, lockand roller are disposed inhousing I4. The pivots for tilting slat I0 are in the housings I3 and I4. When the blind slats are lowered the full length with the window open, the blind is. held against swaying by hooking the anchor ends "I"l of the elevating cords I over sill hooks Ia and then drawing the elevating cords 30 taut and locking same at the housing I4 as hereinafter explained.

Referring now to Figures 2 to 6 and 9, and more particularly to the head bar construction, it will be seen that the head bar is in the form of a channel bar stamped from sheet metal with preferably a straight even bottom or web I5, front and rear anges I6 and I`I stamped with longitudinal depressions I8 and I9; and longitudinal inwardly projectingfianges 20, the flanges I6 and I'I servu, ing to prevent bending or sagging of the head bar due to the weight of the slats suspended therefrom, and the depressions I8 and I9 and flanges 20 serving as guides and retaining -means as will hereinafter appear. The head bar is open at both 45 ends, and the web I5 is cut back at both ends to provide a space between the projecting anges I 6 and I'I equal to the depth of the housings I3 and I4 asbest seen in Figure 9. The flanges I6 and II at both ends have tongues 2| projecting beyond 50 vthe ends of the flanges which are adapted to be bent over the housings I3 and I4 when the head bar, housings, tilting slat I0, and the elevating and tilting cords are assembled as shown in Figure 2, to hold those parts together rmly and in proper alignment without any other fastening means pending final hanging, adjustment and clamping on brackets 9. At each end of the front flange I6 of the head bar is a round hole 22'l (see Figure 9) to permit entrance of a screw 22, and at each end of the rear flange I1, approximately the full width of the depression I9, is an elongated rectangular hole 23, see Figures 2, 4 and 9, the purpose of which will be hereinafter referred to.

In the web I5 are two rectangular holes 24. both cut at an angle to the longitudinal center of the head bar, through which elevating cords 'i pass downward and through holes in slats 6 for attachment to the iowermost slat 6 for raising and lowering the slats. At each hole 24 a roller 25 is journalled in a bearing block 26 stamped from sheet metal .and having a pair of upwardly projecting fianges 21, one flange having a round hole for one journal of roller 25 and the opposite flange having a slit 28 in alignment with the hole and having a rounded bottom to form the bearing for the other journal of the roller 25. Adjacent slit 23 is another slit 29, not as deep 'as slit 28, forming a tongue 30, which, when the roller 25 is in place between the flanges 21, is bent over the journal to prevent displacement of the roller from the block, see Figure 4. The web of roller block 26 is punched out to form a rectangular opening corresponding to hole 24 in the head bar web, and the metal punched out is bent down to form two flanges 3I which project through the hole 24 and are bent over fiat against the underside of web l5 to secure the roller block in posi-Y tion as seen in Figure 2. It may be here noted that the holes 24 are punched in web I5 at deflnite points and at definite angles relative to the center line of each standard length head bar and slats to go with such head bar, so that the axes of rollers 25 when set in position will be exactly perpendicular to the elevating cords extending horizontally within the head bar as seen in Figures 2 and 4. It will also be noted that a roller is employed in preference to the usual grooved shcave, and that the roller is relatively long, and that hole 24 is quite large relative to the diameter of cord 1. This construction presents a smooth curved surface formed by flanges 3| at each side of the hole 24 under and adjacent the ends of the roller and reduces, to a minimum, wear of the cord. By the simple arrangement of the square holes 24 cut at the desired angle relative to the center line of the head bar,

and the parallel flanges 3| on bearing blocks 26, the rollers 25 may be set and secured at the correct angle for cords 1 without other adjustment or fastening means.

The web I5 of the head bar is cut out at each ed as abovestated the full width between the flanges I6 and I1 to a depth equal to the thickness of housings I3 and I4 (see Figure 9) to permit telescoping the housings into the head` bar between the flanges I6 and I1 with the outer walls of the housings flush with the ends of the flanges so that tongues 2I may be bent over inwardly at right angles and flush against the outer walls of thev housings as best seen in Figures 2 and 4. 'I'his locking by tongues 2l plus a feature in the construction of the housings I3 'and I4 hereinafter referred to constitute the sole means for securing the lhousings upon the head bar, thus dispensing with soldering, welding, riveting, bolts or screws in assembling the head bar and housings, and permitting quick lassembly or disassembly for replacement of cords or other parts when necessary. 'I'he construction of the housings and the mode of assembly upon'the head bar is such that tongues 2| are not necessary to hold the housings in position after the blind is hung and secured on the hanging brackets 9. The tongues are only essential for securing the housings in position when the assembling is done at the place of manufacture.

The housing I3 which carries the tilting mechanism is stamped from sheet metal in two parts, one part having a wall32, front flange 33, rear flange 34, and bottom flange 35, the top being entirely open, see Figures 4, 5, 'l and 8. Front flange 33 has a rectangular shaped wing or extension 36 of a width to make a close sliding fit between web I5 and iiange 20 of the head bar, and of a length to insure holding the housing against tilting movement on the head bar due to the weight of the blind slats or the pull of the tilting cords. The front flange 33 is stamped out depth to receive flush and form a seat for a square screw-threaded nut 39, see Figure 9, into which screw 22 is threaded when the parts are finally assembled and adjusted on brackets 9 as seen at the left end of Figure 4, and as hereinafter more specifically referred to. The rear flange 34 of the housing has a wing 40 of the same shape and dimensions as wing 36 on the front flange, and this wing has a long rectangular hole 4I corresponding in width and length to the hole 23 in the rear 'ange depression I9 of the head bar and which vholes register when the housing I3 is fully telescoped into position on the head bar as seen in Figures 4 and 9. The bottom flange of the housing is severed from wall 32 at its forward end, and this severed end is perforated centrally of its width -with a small hole and bent back on the line of such perforation as shown at 42 in Figure '1. This bend 42 forms a guide for tilting cords I2 and a guard for the end of pin 43 which is driven with a tight fit through a perforation in flange 33 and through the perforation in guard 42 as seen in Figure '1. The width of anges 33 and 34 is such to form a box of a depth to freely accommodate the two tilting cords which are held spaced by pin 43 as seen in Figure 4, and which pin prevents the cords from twisting as'they are drawn into and out of the housing in tilting theslots. The housing is completed by a cover section 44 stamped from sheet metal to make a close t between flanges 33 and 34 and having top and bottom rectangular fianges which bear againstA the wall 32 as seen in Figure 8. 'Ihe lower flange of the cover is cut away at the forward end to provide an opening for the passage of cords I2v the lower half of the circle thereby forming a lug .or ear, and the center of the depression. has a hole punched through toform a bearing for the journal 46 of pinion 41. The wall 32 is perforated at its center inaligmnent with the perforation inA depression 45 to form the opposite bearing 46 for pinion 41. This pinion is made from stockpinion rod with reduced iournal ends and is of a length to fit between wall 32 and depression 45 and has sure on the disk and the difference in pitch dii f two functions. One function is to serve as a spined shaft or hub for disk 43, and the other as la pinion for imparting rotary movement to gear segment 49 which is mounted on the outside of housing I3 on a pivot pin 50 inserted through holes in the cover plate 44 and wall 32. This pivot pin is in the form of a rivet and serves also'to hold the cover plate in position at the bottom, and at the upper part the cover is locked in position by slight angular bends 36 and 4II'L given to the lower inner edges of wings 36 and 4U as seen in Figures 5 and 8.

Disk 48 shown in detail in Figure '1 is a. plate of sheet. metal having its center punched out with notches to engage the splines of pinion rod 41, and radial punchings I, eight being shown,

bent outwardly and alternately on oppositesides of the disk, to form lugs or hooks around whichl tilting cords I2 are wound in opposite directions. As seen in Figure '7, cords I2 are threaded through the opening at the front lower corner of housing I3 and coiled on hooks 5I in a flat spiral of two convolutions in opposite directions on opposite sides of the disk, the ends of the cords being held by slightly pinching the first engaging hook. In the position shown in Figure 5, the slats are held in the horizontal position by gear segment 49, the coils of the cords I2 being shown in dotted lines. When either vcord I2 is drawn downward, disk 48 is rotated, unwinding the cord on one side of the disk and winding up on the other side. As seen in Figure '7, the cord shown in full lines is in front of the disk .and has been unwound, thereby turning the disk clockwise and the gear segment counterclockwise` to the position showny in dotted lines,

and the cord behind the disk having been wound are longer than the segment teeth thereby, ar.-

resting the rotation of the segment when either tooth 52 engages the pinion 41. v

Owing to the fact that tilting slat I0 is piv-y oted centrally on its longitudinal axis, and therefore balanced by the suspended slats 6, and owing to the large difference in pitch diameters of segment 49 andpinion 41, slats I0 and 6 will -readily remain in any adjusted angle, but in order to insure maintenance in the adjusted position against air currents and any `attempt -to change the adjustment by direct tilting of the slats by hand, Iprovide a light brake for disk 48 in the form of a bowspring blade 53, see Figure '7. The curved ends, of this spring bear against ,flange 34 of the housing and the bow contacts with the peripheral edge of disk 46 exerting a slight pressure thereon. With this slight presameters of pinion 41 and segment 49, the pinion will act as a stop for the gear segment and readily maintain the slats in any adjusted position.

When a pull is exerted on either cord I2, however, the leverage is reversed and thev braking action of spring 53 is readily overcome, and pinion 41 will readily rotate the segment to adjust the slats.

bent into box-like form. The rmain section which forms end wall 54 is bent at right angles on the dotted line a to form the bottom of the housing, and upward on line b to form a retaining flange 55. At the rear, the end wall 54 is bent at right angles on the line c to form the rear wall 56, and this flange is extended at the top to'form rectangular wing 51 having a rectangular hole 58 corresponding in size to hole 2 3 on the head bar flange depression I9, and said wing and hole corresponding to the wing and hole 4Il4I on housing I3 as seen in Figures 4 and 9. The front end of wall 54 has two extensions 59 and 6I, severed by a cut 69, and these extensions are bent at right angles on the-line d to form the front wall and also a wing 59 of the same shape and size as wing 51. Extension 6I is bent over at a right angle on the line e to form inside wall 6I and bent again at a right angle on the line f to form flange 62, and a final right angle bend on the line g to form flange 63,

the twoflanges 62 and 63 serving as spacers between end wall 54 and inside wall 6I, and the inside wall 6I being retained in position by flange 55. The front wall section at the wing portion 59 is stamped out to form a recess 31 and- L-flanges 36, similar to the recess 31 on housing I3, to receive a square screw-threaded nut 39 which will register with hole 22n at the right-hand end of vthe head bar to receive a screw 22. The lower front corner of housing I4 is cut away to form the entrance for cords 1 as seen at 64 in Figures 2, 6 and 10. This cut out is formed by the irregular out indicated by line h in the metal blank of Figure 11 and extends from flange 55 to flange 63, so that when the blank is bent into form as above described, the cord entrance 64 is formed. 'I'he bottom wall of the housing and the inside wall 6I are each perforated at a point midway of the opening 64 as indicated at i in Figures and 11, through which perforations a headed pin 65 is inserted and its en d bent over to retain it in position as seen in Figure 6. This pin holds cords 1 in spaced relationship and prevents twisting as the cords pass up and down through the opening 64. The end wall 54 at a point beginning in line with i the upper edge of wall 6I has two vertical shifts k through which the arms 66--61 of a U-shaped bracket are inserted. This bracket is made from flat strip metal bent at right angles to form a fiat cross piece which will lie close to the wall 54 when the bracket arms are projected through the wall as seen at 66 in Figure 4. When housing I4 is placed in .position on the head bar by telescoping wings 51 and 59 between web I5 and flanges '20 as seen in Figure 4, bracket arms 66--61 will rest on web I5 as seen in Figure 6. 'This bracket is provided with a hole and slit to i'orxn `bearings for roller 69 over which elevating Acords 1 pass from housing I4 to rollers 25 on the head bar. This roller is located with respect to lthe housing I4 and web I5 of the head bar so as 'to be in alignment with opening 64 at the bottom of Vthe housing. y The bearings and retaining means for roller 69 on arms 66--61 are exactly similar to the bearingsfor rollers 25 and therefore detailed Vdescription of same need not be here repeated.

lThe locking means for the elevating cords 1 comprises two curved indentations 10' and 1I in kwalls'54 and 6I of housing I4, as seen in Figures 2, 6 and 9, and a wedging roller 12. The length of indentations 10-1I as seen in Figure 6 will y be such as to insure contact with the pair of cords 1 in passing to roller 69 and their depth and the-diameter -oi roller 12 will be such as to insure wedging of the cords to sustain the weight of slats 6. While I have shown two oppositely set depressions 1li-1I, a single depression 1| may be employed. The wedging roller 12 will be of a length suflicient to bridge the pair of cords 1 or about the same length as depressions e-1| and the end 13 of the roller projects and which serves as a bearing for the roller pin as seen in Figure 6. The roller pin rests loosely at the bottom of the housing between cords 1 and wall 54 and is of such diameter. that when the cords hang or are held straight down from opening 64, the cords will be in contact with the roller pin, and within the housing the cords will be caused to curve over into the `path of. vertical movement'of the pin due to their contact with depression 1I as seen in Figure 2. In drawing the cords downward to raise the blind'slats, the cords travel over rollers 25 and 69 and in contact with depression 1I, and if the cords are held straight, that is, parallel with window casing 3, they will rotate the pin 12 without, however, causing any locking action. When it is desired to hold the blind slats at any elevated position, the cords are held toward the casing 3 and allowed to moveupward due to the weight of the slats suspended therefrom, and this movement will cause the roller pin to rotate in a clockwise direction as viewed in Figure 2, and travel upward with the.

cords until the cords bind between depression 1I and the pin, whereupon the weight of the slats tending to draw the cords upward will increase the gripping eiect by jamming the cords and roller pin between the depression 1I and wall 54, or when the second depression 10 is provided, the cords and roller pin will jam between the two depressions as shown in dotted lines in Figure 2. To release the lock preparatory to raising or lowering the slats, cords 1 are drawn downward slightly and swung toward the left,

that it at an angle to the housing I4. This movement will release the grip on the roller pin and permit the pin to drop to its horizontal position in the housing, and while the cords are still held to the left, they may be allowed to move upward to lower the slats orbe drawn downward to raise them. To again lock the cords to hold the slats in -a readjusted position, the cords are swung back'toward the casing 3 and allowed to m'ove upward, whereupon the gripping action above described will be repeated. y

In effecting the locking of the cords 1, a slight drop of the slats occurs until the cords are rmly gripped between the depression 1I and roller 12. To reduce this drop and practically effect an immediate gripping, I provide the second depression 1li which is located lower than the depression 1I and causes the roller to ride toward the vertical center of the housing andhastens the bending of the cords under depression 1|4 and consequently effecting a more rapid binding between the cords and roller. For the purpose o! increasing the gripping eiect and to make certain the pick-up of the roller by the cords 1, the end of the roller pin which overlaps the cords is knurled. It willfbe observed by reference to Figure 6, that while the end 13 of the roller pin rests loosely in the notch I in flange 62, this rest not only constitutes a retaining means for preventing displacement of the roller pin, but also serves as a pivot whereby the entire weight of the long pin will operate quickly to. return the gripping end 5 10 The tilting slat I6 is detachably mounted'between gear segment 49 and pivot bar 15, the latter being pivoted on housing I4 by pivot pin 16. Segment 43 and bar 15 each has a pair of laterally projecting wings 11 and v18, respectively, as 15 seen in Figures 5 and 6. As shown in dotted lines in Figure 4, and in solid line" in Figure 9, wings 11 are curved as indicated at 11a to aiord clearancefor segment stop teeth 52 and pinion bearing 45, and wings 'I8 have right angle cut 20 outs as indicated at 18 to clear the edge of the flare given to the wall of housing I4 at the opening 64, and also to clear the cords 1 when the slat I0 is tilted. Slat III at both ends is cut away at both the outer edges as indicated in Fig- 25 ure 9 at I0, and at the center line as indicated at III", and as shown in dotted lines in Figure 4, to clear, respectively, the pinion bearing 45 and the head of pivot pin 56 at housing I3, and the are at opening 64 and pivot pin 16 athousing 30 I4. These cut out clearances on slat I0 are made alike at both ends of the slat to simplify assembly on the wings 11 and 16. The inner edges of the h ollow beads IIIc on slat I Il are cut away at both ends of the slat to a point indicated at IIId in 35 Figure 2 to permit entrance of wings 11` and 18 into the beads as seen in Figures 5 and 6. It will be observed that the spread of wings 11 and 18 is such that the ends fitclosely between the beads as seen in Figures 5 and 6, and it will be'40 understood that the clearances at the ends of I the beads for the entrance of the wings is such that the wings will slightly ilex the beads in(l entering so that a sumcient tension is created to rmly hold the upper surfaces 'of the wings in 45 close contact with the underside of slat I0 and thus prevent lost motion between the slat and 4 pivot members 49 and 15. This construction of the tilting slat and wings on the pivot members permits assembly by a simple telescoping move- 50 ment requiring no other fastening means when the head bar and tilting slat are assembled.

.I The tilting slat I6 and each of the slats 6 suspended therefrom are perforated for the passage of the elevating cords 1, and the lowermost slat 55 `,6.is provided with anchor plates 19 stamped from sheet metal with a slotted cavity or pocket 60 and a hole which is drawn-out to form a ferrule 6I which ts the hole in the slat and is Aspun over, as. shown in Figure 2, to secure the anchor 60 plate to the underside of the slat. The elevating cords pass through ferrules 8I and the ends are knotted as at 82 and the knotted ends are slipped into the pocket 80.

. In Figure 12 is shown an arrangement of com- 65 pound elevating cords for a blind of extra width. In this arrangement the head bar 8, tilting mechanism and housing I3, elevating cord rollers 25 and 6.9, locking mechanism and housing I4, tilting slat I6, etc. are similar to the. arrangement 70 shown in Figure 2. But, in this arrangement the rollers 25 are spaced further apartl and a single anchor plate 19 having two slottedpockets 80 and one ferrule 6I is provided on the head bar, and

' thev lowermost slat 6 is provided with two rollers 75 25 mounted and secured in the same manner as described in connection with Figures 2 and 4, anda third'roller bearing 83 secured in the same manner, but having two rollers 84 with the hole for the cords 1 located between the rollers. The elevating cords are threaded up through housing I4 as in Figure 2, then over roller 69, then over rollers 25 on the head bar and down through the slats I and 6, then over the lower rollers 25 and 84 and up through the slats to the anchor plate 19 on the head bar. With this arrangement a third or intermediate tape 14 is employed and connected with the slats in the same manner as above described, and this tape, as do the other tapes', serves to cover the cords 1 passing through the slats. In this arrangement for wide -blinds the weight on the head bar and tilting slat is distributed and the pull on the cords is reduced.

For the purpose of supporting vthe tilting slat at the mid-section to prevent sagging and reduce the tendency to twist, especially in wide blinds having extra length slats, I provide one or more hangers 85 (Figure 12) and shown in detail in Figure 13. When one such hanger is employed it will be located at approximately the middle of the head bar, and when twoare employed they will be suitably spaced from the center. In Figure 13 the hanger comprises a heavy wire 86 bent into an arch and having its ends welded or otherwise rigidly secured tothe tilting slat |0 near the edge as shown in Figure 13, and a bracket 81 attached to web I5 of the head bar. The bracket may have a pin or roller 88 on which the arch 86 is hung, and the curve of the arch is such that uniform contact will be maintained on the roller at all angles of the tilting slat I0.

The brackets 9 for hanging the blind as shown are left and right-hand, and each bracket comprises a main body 89 provided with screw holes for securing the bracket to the side frames 2, 3 of the window casing, a rear flange 90 projecting at right angles to body 89 and likewise provided with screw holes for securing the flange to the angle of the window casing adjacent the sash, and a top ange 9| projecting at right angles from body 89 and alsofprovided with screw holes for securing the bracket to the top rail 4 of the casing. By this arrangement of body and flanges, the .bracket may be secured at any one of three sections of the casing or at any two or all sections, accordingto the construction oi' the window casing, and the size and weight of the blind,

and the flanges 90 and 9| serve an additional' purpose as Awill presently appear. The top ilange 9| has an extension 92 bent at right angles to the ange and this extension is cut to provide a hook 93 projecting rearward toward, but spaced from, the rear bracket ange 90 as seen in Figures 4, 5

, andr 6. The front end of body 89 has a projection 94 bent at right angles to the body, and this projection is stamped with a depression 95 and slot 98 as seen in Figures 2 and 4. The depression 95 is stamped to match and seat into depression `Ill on head bar wall I8 and the slot to register with the hole for'screw 22. The entire bracket as seen is stamped and bent into shape from a "single piece of sheet metal.l

"rear wall against bracket'ila'nges 90 and then sliding the' head bar upward against the top flange 9|. In this movement, the extensions 92 with hooks 93 will pass into the open top o1' the head bar and bring the hooks into alignment wlth rectangular holes 23-4I and 23-58. 'Ihe head bar is then moved forward, the top flanges 9| of the brackets serving as guides, to bring the front wall I8 against the front projections 94 of the brackets. In this movement, hooks 93 pass through holes 23-4I and 23-58 and the head bar is then lowered to allow the rear walls to rest on the hooks as seen in Figures 5 and 6. The entire structure will now be suspended from the hooks vand permit easy adjustment of the head bar with the suspended slats longitudinally within the window casing without other support.'

When properly aligned, screws 22 are inserted through slots 96 in the bracket projections 94 and screwed into nuts 39, which, when screwed up tight, will draw the head bar and projections 94 tightly together with depressions 95 and I8 interlocking. The head bar and housings with the suspended slats will now be suspended in xed vposition from hooks 93 at the rear and locked at the ffront to bracket arms 94 by screws 22. Thus, by providing recesses 31 in housings I3 and I4 into which nuts 39 are seated and retained by ange I6 of the head bar when the housings are telescoped into the head bar, and the use of two screws 22 which pass through bracket arms 94 and head bar ange I6, the entire structure is locked to the brackets in adjusted position within the window casing. To remove the blind, all that is necessary is to withdraw screws 22 and slide the head bar backward and lift it oi the hooks 93. For ornamental purpose, the heads of screws 22 may be of any desired design.

The construction of the blind slats and the mode of connecting them with the tilting and suspension tapes 14 is similar to the construction and arrangement shown in my application Serial No. 18,300, led April 26, 1935, now Patent 2,074,- 842, Mar. 23, 1937, andvtherefore it is sufficient to say that tapes 14 have loops in which staples 14 are hung and the ends of the staples are inserted through holes in the edges of beads I0c on the slats and bent to retain them in engagement with the slats.

As a specic mode of attachment of the tilting tapes 14 to the top and bottom slats, Figures 13 and 14 show the tapes 14 having loops 91 threaded through heavy staples orlinks 98 of suicient width to receive the entire width of the tape and having their ends hooked into beads |09. Near the ends of loops 91 are staples 14a which are inserted into theaead I0c of the adjacent slat, the legs of the staples entering the same holes as the staples of the tape section 14 as seen in Figure 13, and the loose end 99 of the loop being turned in to lie on the upper side of slat 8. At the` bottom slat 6 the loop 91 will be carried up to the next higher slat 6 and the staples near its end will be hooked into the slat bead in the same manner as illustrated in Figure 13 except that the loose end will lie against the under side of the slat 6. This" mode of connectionl reduces the strain on the upper and lower connections of the tape to the slats I0 and 6; avoids the necessity for nishing the-ends of the tapes to prevent ravelling of the fabric; and provides a more iinished appearance to the tape ends as will be seen by reference to Figure 1.

To finish oif the bottom slat and conceal the elevating cords, rollers and anchors, I provide a shell |00 shown in Figures 12 and 14. 'This shell is removably attached to slat 8 by springing beads |0| into the recesses formed by slat beads i6 of complete assembly ready for hanging without which for this purpose are not bent in close against the under side of the slat as is the case with the rest of the slats, but are bent to present a flange substantially parallel to the body of 4the slat as seen in Figure 14. By this means, the under side of the lower slat when the blind is in elevated position will present a smooth finished appearance with the elevating cords, rollers and anchors entirely concealed.

From the foregoing description and drawings, it will be seen that a construction and assembly of parts has been devised for Venetian blinds which permits production of an all metal blind,

in other words the' head bar and hangers are constructed from sheet metal stampings capable welding, soldering, riveting or bolting, and capable of complete disassembly for repair or change oi parts without cutting or damage to any of the parts. Furthermore, it will be seen that a construction has been devised permitting ship- .ment of parts partially assembled or. in wholly disassembled condition capable of complete assembly at the place of installation without the use of special tools and by unskilled persons.

Furthermore, a head bar construction has been devised capable of quick assembly into a complete, rigid and perfectly aligned structure, with minimum eort, by simply telescoping thehousings and main tilting slat upon the head bar, and capable of being hung and adjusted within a window casing by unskilled persons with maximum safety and accuracy by simply hanging the head bar structure with its suspended slats and operating cords on the bracket hooks and inserting the clamping screws to lock the head bar in position on the brackets. Moreover, I have described a structure in which the parts thereof can easily be painted and by the use of standard square nuts, as above described, avoid the diniculties attending the assembly of parts having paint illled tapped holes therein.

While I have described what seems now to be the preferred embodiments of my invention,it is conceivable that various modiiications in the conguration, composition and disposition of the component elements going to make up the same may occur to those skilled in the art, and no limitation is intended by the phraseology. of the foregoing description or illustrations in the accompanying drawings.-

What is claimed is: y

l. A head bar and housing unitfor Venetian blinds comprising a channel bar having a horizontal web and vertical front and rear walls, and a housing at each end of vsaid bar having a pair of wings having a sliding fit laterally between ,said front and rear walls said housings being secured by cooperation between the lower edges cf said wings and the horizontal web.

2. A head bar construction for Venetian blind comprising a channel bar having a horizontal web and vertical front and rear walls extending beyond the web and having intumed ilanges; and a housing at each end of said bar having a sliding t between the projecting front and rear walls, and said' housings having a pair of wings projecting within the bar and having a sliding ilt laterally between said front and rear walls and `vertically between said web and inturned flanges.

3. A head bar construction for Venetian blinds comprising a channel bar having a horizontal web and vertical front and rear walls extending beyond the-web and having intumed flanges, a housing at each end of said bar having a sliding iit between the projecting front and rear walls, and said housings having a pair of wings projecting within the bar and having a sliding t laterally between said front and rear walls and vertically between said web and intumed flanges,

and tongues for locking said housings' in position .A

- between said walls.

4. A head bar construction for Venetian blinds comprising a channel bar having a horizontal web and vertical front and rear walls extending beyond the web and having intumed flanges, a housing at each end oi said bar having a sliding t between the projecting front and rearwalls, and said housings' having a pair ofvwings projectlng within the bar and having a sliding fit laterally between said front and rear walls and vertically between said web and inturned flanges, and tongues projecting longitudinally from the ends of said walls for locking said,housings in comprising a channel bar having a horizontal web and vertical front and rear walls having inturned flanges, a housing at each end o f said bar provided with wings having a sliding fit laterally between said front and rear walls and vertically between said web and intumed flanges, and a -hole 'near each end of the rear wall adapted to register with a hole in the adjacent housing wing, in combination with a pair of head bar brackets each having a hook adapted to enter the holes for supporting the head bar and housings.

6. A head bar construction for Venetian blinds comprising a channel bar having a horizontal web and vertical front and rear walls having inturned iianges, a housing at each end of said bar provided with wings having a sliding fit laterally between said front and rear walls and vertically between said web and inturned ilanges, and a hole near each end of the rear wall adapted to register with the hole in the adjacent housing wing, in combination with a p air of head bar brackets each having a hook adapted Vto enter the holes for supporting the head bar and housing at the rear, and each bracket having a front flange extending to said bracket flanges.

'7. A head bar construction for Venetian blinds comprising a chanel bar having a horizontal web and vertical front and rear walls having intumed anges, a -housing at each end of. said bar provided with wings having a sliding ilt laterally between said front and rear walls and vertically between said web and intumed flanges, a hole near each end of the rear wall adapted to register with a hole in the adiacent housing wing, and recesses in the front walls of said housing for seating screw threaded nuts registering with holes in the front walls of the head bar, in combination with a pair of head bar brackets each having a hook adapted to enterrsaid holes for supporting the head bar and housing at therear, and each bracket having a slotted front ange extending parallel to the. front Wall .-of the head said housing, tilting cords attached to and coiled Venetian blind, comprising a housing, a disk journalled'in on opposite sides of said disk in opposite directions, and a tilting slatoperatively connected with said disk.

9 A slat tilting mechanism for a Venetian blind, comprising a housing, a disk journalled in said housing, tilting cords attached to and coiled on said disk in opposite directions, a pinion operatively connected with said disk, a gear segment pivoted on said, housing and meshing with said pinion, and means on said gear segment for engaging a tilting slat.

10. A slat tilting mechanism for a Venetian blind, comprising 'a housing, a disk journalled therein, 'tilting cords attached to and coiled on said disk in opposite directions, a pinion operatlvely connected with said disk, a gear segment pivoted on said housing and meshing with said pinion, a brake engaging said disk, and means on said gear segment for engaging a tilting slat.

v11. A housing for the tilting mechanism of a Venetian blind, comprising a body part having iront and rear walls projecting at right angles to the body and which ywalls are extended to providesupporting wings for insertion into a head t bar, a cover member between which and the body comprising a generally channel-shaped bar having each end thereof formed for a slidably gripping engagement with a housing, in combination with a housing mounted at each end of said bar, each ot said housings having means projecting laterally therefrom and adapted to slide snugly into the ends of said channel bar whereby said housings are held against a movement of rotation with respect to said head bar.

13. A Venetian blind head bar unit comprising in combination a head bar having the ends thereoi' adapted for a slidably gripping engagement with a portion of a housing, a Venetian blind slat, a housing mounted on and depending from one end o! said head bar and adapted to conceal within the same a slat tilting mechanism, a housing 'mounted on and depending from the other end of said head bar and adapted to conceal within the same an elevating cord locking mechanism, each of said housings having means for rotatably supporting said slat in spaced relation with respect to said bar, and means projecting laterally therefrom and adapted to slide snugly into an end oi said bar whereby said housings are held against a movement oi' rotation with respect to said head bar.

SAMUEL HABMIIER.

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