US2629434A

US2629434A - Venetian blind supporting and actuating structure

Info

Publication number: US2629434A
Application number: US778002A
Authority: US
Inventors: Nelson Harry
Original assignee: LORENTZEN HARDWARE Manufacturing CORP
Current assignee: LORENTZEN HARDWARE Manufacturing CORP; LORENTZEN HARDWARE MF'G CORP
Priority date: 1947-10-04
Filing date: 1947-10-04
Publication date: 1953-02-24
Anticipated expiration: 1970-02-24

Description

H. NELSON Feb. 24, 1953 VENETIAN BLIND SUPPORTING AND ACTUAT ING STRUCTURE 4 Sheets-Sheet 1 Filed Oct. 4, 1947 INVENTOR HARRY NfZSO/V BY M, MI M HIS ATTORNEYS Feb. 24, 1953 H. NELSON 2,629,434

VENETIAN BLIND SUPPORTING AND ACTUATING STRUCTURE Filed Oct. 4, 1,947 4 Sheets-Sheet 2 FIG.2

FIGS

INVENTOR HARRY NELSON HIS ATTORNEYS H. NELSON Feb. 24, 1953 VENETIAN BLIND SUPPORTING AND ACTUATING STRUCTURE Filed Oct. 4, 1947 4 Sheets-Sheet 3 Feb. 24, 1953 H. NELSON 2,629,434

VENETIAN BLIND SUPPORTING AND AC'TUATING STRUCTURE Filed Oct. 4. 1947 4 Sheets-Sheet 4 FIGJS FIG.I4

- INVENTOR HARRY NELSON HIS ATTORNEY Patented Feb. 24, 1953 VENETIAN BLIND SUPPORTING AND ACTUATING STRUCTURE Harry Nelson, New York, N. Y., assignor to Lorentzen Hardware Mfg. Corp., New York, N. Y., a corporation of New York Application October 4, 1947, Serial No. '77 8,002

11 Claims.

This invention relates to Venetian blinds, and more particularly to Venetian blind head-bar organizations and associated parts. Certain feature of the invention are applicable to various types of head bars, but the invention as a whole is particularly applicable to metal head-bar organizations of the type known in the trade as enclosed metal heads.

So-called enclosed heads may be handled and installed as a unit. They include a tilter, a tilt rod, tape rockers, a cord lock, and tilt rod cradles that have cord guides, all enclosed within the head bar and usually mounted along the base of a channel-shaped head bar. Thus, there is no occasion to use a valance to conceal the various fittings by which the blind is supported and adjusted. A head-bar organization of this type is shown in my Patent No. 2,455,135 issued November 30, 1948, the present invention being in some respects an improvement over the construction there shown.

Heretofore the tilter, tilt rod, etc. have been centered on the longitudinal center line of the head bar channel. In the form shown of the present invention, these parts are centered on a line parallel to the longitudinal center line of the channel and positioned to the rear of such longitudinal center line, the rear of the channel being the side which is located away from the room when the blind is mounted in a window frame. Thus, the assembly of slats which compose the blind hangs with the central vertical plane of the assembly in a rearwardly offset position with respect to the longitudinal center line of the head bar channel. This permits the tilteroperating cord and the manually-grasped portion of the lift cords to pass downwardly through the bottom of the head bar channel in such position as to effectively clear the top slat of the blind, thereby affording free manual manipulation of these cords without their scraping the front edge of the top slat of the blind and thereby angularly displacing this slat from its proper position as determined by the tilter and ladder tape. Further, since these cords will hang clear of the top slat, they will not bind and interfere with operation of the cords themselves or the tilting movement of the top slat. The elimination of such scraping is particularly advantageous in metal slat blinds, since cords may become rapidly worn by scraping on the edge of a metal slat.

The form shown of the present invention provides for more facile installation of the tilt cord in an enclosed head bar. Also it embodies an 2 improved end brace and an improved top brace which may be installed with increased facility.

Among the objects of the invention are to eliminate scraping of the tilt and lift cords on the front edge of the top slat of the blind, to provide adequate operating clearance for such cords without increasing the front-to-rear dimension of the head bar, to provide for more facile installation of the tilt cord in an enclosed head, to provide an improved end brace for enclosed metal heads, to provide an improved top brace for enclosed metal heads, to improve the speed of assembly of enclosed metal heads, to provide an enclosed metal head and parts therefor which can be rapidly and economically manufactured as rolled or stamped sheet metal parts, and to generally improve enclosed metal heads and the parts therefor from the standpoints of manufacture, assembly, use, and durability.

Further objects, and objects relating to details and economies of construction, manufacture, and use will more definitely appear from the detailed description to follow.

My invention is clearly defined in the appended claims. In the claims, as well as in the description, parts are at times identified by specific names for clarity and convenience, but such nomenclature is to be understood as having the broadest meaning consistent with the context and with the concept of my invention as distinguished from the pertinent prior art. The best form in which I have contemplated applying my invention is illustrated in the accompanying drawing forming part of this specification, in which:

Fig. 1 is a perspective view of a Venetian blind embodying the present invention, portions of the head bar and one ladder tape being cut or broken away to show details of construction.

Fig. 2 is a top plan view of the head-bar organization, portions being in section or broken away for convenience of illustration.

Fig. 3 is a top plan view of the head bar channel including an end brace, portions of the bar being in section or broken away for convenience of illustration.

Fig. 4 is a perspective view of one end of the head-bar organization, certain parts being in section or broken away and the end brace and installation bracket being shown in exploded position.

Fig. 5 is an inverted perspective view of the tilt rod wedge.

Fig. 6 is a fragmentary perspective view, show- 3 ing the cord lock and the adjacent portion of the head bar.

Fig. 7 is a perspective view, with certain portions broken away, of an installation bracket for use with the head-bar organization, this bracket being of opposite hand to that shown in Fig. 4.

Fig. 8 is a perspective view of a tape rocker and the adjacent portion of the tilt rod, portions of the tilt rod cradle being indicated in dot-dash lines.

Fig. 9 is a top plan view of the tape rocker shown in Fig. 8.

Fig. 10 is an end elevation of the tape rocker shown in Fig. 8.

Fig. 11 is a side elevation of a top brace for the head bar channel, portions of the channel being indicated in dot-dash lines.

Fig. 12 is an end elevation of the top brace shown in Fig. 11.

Fig. 13 is a perspective view showing a so-called intermediary support for the head bar, together with the top brace shown in Figs. 11 and 12. Portions of the head bar channel are either shown or are indicated in dot-dash lines.

Fig. 14 is a side elevation of the so-called intermediary head bar support in mounted position, parts of the head bar channel being indicated in dot-dash lines.

Reference will first be had to Figs. 1, 2 and 3. The head bar channel of the Venetian blind is formed of a length of chamiel-shaped sheet metal severed from a piece of indeterminate length. By making head bars which vary in length in increments of 1" windows of all widths between the shortest and longest head bar can be provided for, as will be pointed out later.

The channel 20 is provided with round, inwardly-turned, open marginal beads 2|, 2| formed along the upper edges of the channel. The channel 20 may also be provided with longitudinal inwardly-pressed beads or corrugations 22 on both the front and back sides of the channel, the front side being considered as the side toward a person operating the blind. The beads 2|, 2| and the corrugations 22 are preferably formed in the indeterminate length of channel stock, in advance of severing to form the head bar channel 20. These beads and corrugations add to the appearance of the head bar and stiffen it against bending.

The operating mechanism of the blind is located within the channel 20, the individual parts thereof being spaced along its length and secured to the inside bottom portion of the channel. This mechanism is secured to the channel by bending over tabs which have previously been struck up from the bottom of the channel, this securing means being generally similar to that shown in the above-mentioned Patent No. 2,455,135. A detailed description of the operating mechanism and its attachment to the head bar channel will be given later.

The channel 20, which is formed of relatively light gauge sheet metal, preferably steel, is reinforced at its open ends by

end braces

24, 24, one of these braces being shown in detail in Fig. 4. The braces for both ends are identical, no lefts or rights" being required.

Each end brace 24 is formed as a sheet metal stampin having a flat plate portion 25 adapted to span the space between the upstanding sides of the channel 20. Inwardly-projecting channelengaging portions 26, 2 8 are provided at the ends of the plate portion 25, each consisting f a fiat plate 21 adapted to lie against the back of one of the beads or corrugations 2 2 of the head bar. The upper portion of the plate 21 has a slightly outwardly offset face 30 adapted to lie against the inside vertical face of a side of the channel 20 adjacent the bead 2| thereof and also has a doubled-over extending flange 3| adapted to lie wholly within the bead 2|, and frictionally engage the same, when in applied position on the head bar. The flange 3|, which may be lightly tapered towards its free end of channel-engaging portion. 26, when in applied position extends diametrically across the interior of the bead 2|, tightly engaging the inner surface of the bead so as to retain the end brace 24 in applied position. This frictional engagement is enhanced by the resiliency of the bead 2| which is expanded somewhat by the telmcoping of portions 30 and 3| into the bead. The frictional engagement may be further increased by serrating or roughening the portions of flange 3| which engage the bead 2|.

The end brace 24 is provided with an inwardlydirected stiffening flange 32 extending along the lower edge of the plate portion 25. This flange, when the brace is in applied position, spans the space between the sides of the channel 20. In addition, an L-shaped slot 34, which extends to the upper edge of the plate portion 2 5, defines a transversely-extending finger 35 which may be reinforced by a stiffening bead 36. The finger 35 is preferably formed with an inturned end 31. Finger 35 may subsequently be bent outwardly as required, as indicated in dot-dash lines in Fig. 4, to prevent end play of the head bar 26 within its mounting brackets. The end braces 24, 24 may be applied by hand pressure alone or may be pressed into position by suitable tools, such as a handor foot-operated press.

The sides of the channel 20 are reinforced by one or more top or intermediary braces 39 located between the ends of the head bar channel. In accordance with the usage in the trade these braces are herein termed intermediary braces, regardless of the number applied to a single head bar channel, and regardless of their position along the channel. This brace is shown in greater detail in Figs. 11, 12 and 13, to which reference will now be had.

The intermediary brace 39 comprises a generally channel-shaped sheet metal stamping having a base 40 and outwardly-flaring sides 4|, 4| forming with the base a rigid intermediate portion. The base 40 is bent downwardly and recurved in

end zones

43, 43 for resilience, as best shown in Fig. 11. The base 40 terminates in angularly-extending

flanges

42, 42 having

prongs

44, 44 which project on opposite sides of the base.

The outwardly-flaring sides 4|, 4| extend along the brace 39 and are adapted to span the space between the beads 2|, 2| of the head bar channel 20 when the brace is in applied position. The relationship of the above-described portions of the brace 39 is such that the brace may be inserted within the channel 20 by placing it transversely within the channel and pulling upwardly by finger pressure upon the brace 39. The U-shaped end portions of the brace provide sufficient resiliency to permit angularly-extending

flanges

42, 42 to enter the open beads 2|, 2| of the head bar channel and assuming an angular position extending diametrically across the interior of the beads, as shown in Fig. 11. At the same time, the ends of the outwardly-flaring sides 4|, 4| have been slid upwardly against the outside surface of the beads 2|, 2| by snap action to the position shown in Fig. 11 in which these ends bear against the upper portion of the beads, thereby assisting in holding the top brace 39 in applied position. The projecting prongs 44 which bear against the inside surface of the beads 2|, 2i also aid in retaining the brace in applied position.

The construction of the intermediary brace 39 is such that, when pulled upwardly against the channel beads 2!, 2i, the terminal portions of the brace lock with those beads by snap action, and the body of the brace then forms a strut extending between the top edges of the channel 26. In applied position the sides 4|, 4! of the brace prevent collapse of the sides of the head bar channel 29 and the

flanges

42, 42 of the brace retain the brace in position. The

resilient end portions

43, 43 hold the beads 2|, 2| of the head bar channel 29 against the tips of sides 4i, 4| of the brace.

At two or more locations along the head bar channel 29, the bottom thereof is slotted as at 52, 52 (Figs. 2 and 3) for the passage of the front and rear branches of ladder tapes 54, 54 (Fig. 1). The metal struck from the bottom of the channel 26 in forming the

slots

52, 52 is projected upward to form

upstanding tabs

55, 55, the lower edges of the tabs being attached to the bottom of the channel. Midway between the

slots

52, 52 the bottom of the head bar channel 29 is provided with a hole 56 for passage of a lift cord 49 (Fig. l).

A tilt rod cradle 46 is mounted within the head bar channel 29 in association with each pair of

slots

52, 52, this cradle being somewhat similar to that disclosed in said U. S. Patent No. 2,455,135. These cradles are duplicates. Each is formed as a one-piece sheet metal stamping having a bottom portion 57 and sides 59 and 60. semicircular bearings 6! and 62 in the top of the

sides

59 and 59, respectively, rotatably support a tilt rod 59, the bearings 6i and 62 each having a bearing surface which extends for a substantial distance axially of the tilt rod.

A tilt rod retainer 64 is formed adjacent the bearing 62, this retainer comprising a pair of

extended fingers

65 and 66, the finger 66 being of greater width and extending lower than the finger 65, After assembly of the entire head bar, including the tilt rod, the tilt rod retainer 64 of the cradle 46 which is adjacent to the free end of the tilt rod may be bodily bent with pliers to the position shown in dot-dash lines in Fig. 2. In this position the finger 65 overlies the tilt rod 59 so as to retain it within the bearings 6| and 62, and finger 66 lies against the free end of the tilt rod thereby providing an end stop for the tilt rod.

The

sides

59 and 69 of the tilt rod cradle 46 are provided with large rectangular openings 61, 6! having coined edges which provide smooth cord-bearing surfaces and prevent fraying of the lift cord 49 passed therethrough. Vertical marginal flanges 69 (four) on the sides 59 and 60 reinforce the sides against bending. The

sides

59 and 69 are reinforced against bendng relative to the bottom portion 57 at their lines of juncture by means of inwardly-pressed stiffening beads 58 which merge with the sides 59 and 60 and which may extend for the entire length of bottom 51. 1

A pulley I6 is mounted on a pair of

ears

53, 53 projecting upwardl from the bottom portion 51 of the tilt rod cradle 46, serving as a cord guide for the lift cord 49. Extending beside the pulley 10 is a pair of upwardly-convergingcord deflectors H, H extending upwardly from the open bottom of the tilt rod cradle and maintaining the lift cord 49 within a groove on the face of the pulley 19.

The tilt rod cradle 46 is retained in mounted position in the head bar channel 29 by bending the upstanding tabs 55, 55 (Fig. 3) over the opposite longitudinal edges of the bottom portion 51 of the tilt rod cradle The spacing of the

tabs

55, 55 is such that the tilt rod cradle fits closely between these tabs and receives the tabs in broad notches l2, 12 formed along the sides of the cradle. The bent-over

tabs

55, 55 provide smooth bearing surfaces for the branches of the ladder tape 54, which pass through the

slots

52, 52.

A tilter 45 is mounted adjacent one end of the head bar channel 20, usually the left end. This tilter may be of more or less conventional design, having a non-circular hole extending axially through a gear 5'! for reception of a similarly-shaped tilt rod. In the head bar assembly, the tilter 45 and the tilt rod cradles 46, 46 are aligned, the tilt rod 56 extending lengthwise of the head bar channel 29.

The tilter 45 is mounted in the head bar channel 29 by bending over a pair of upstanding tabs 14, 14 (Figs. 3 and 2) previously struck from the bottom of the channel. These tabs are bent downward upon a horizontal mounting flange T5 of the tilter, being received in notches 76, 16 formed in the edge portion of the flange. For convenient and economical stamping of the body of the tilter, projecting portions 77, ll (Fig. 4) at the top of the tilter body may nest with the notches l6, 16 of the mounting flange in blanking out the tilter bodies.

From a study of Fig. 3, it will be noted the center line of tabs l4, 14 passes midway between

slots

52, 52, and that this line lies to the rear of the center line of the head bar channel 29. This arrangement is such that the axis of tilt rod 50 is offset rearwardly from the center line of channel 20 by the amount q shown in Fig. 2. The position of the

slots

52, 52 in the head bar determines the position of the

ladder tapes

54, 54 inasmuch as the ladder tape branches pass upwardly through these slots. Accordingly, disposing these slots rearwardly has the effect of moving the

ladder tapes

54, 54 and the assembly of-slats 17 carried thereby in the usual manner, rearwardly by the amount q relative to the longitudinal center line of head bar channel 20. The advantages derived from this construction and arrangement will be discussed after the description of the head-bar organization has been completed.

The tilter 45 is provided with a cord guide 19 which is generally similar to that described in my Patent No. 2,430,579, issued November 11, 1947, but which is immovably secured to the frame of the tilter. This cord guide is mounted directly beneath the tilt cord pulley 89 and serves to retain a tilt cord 8! which is reeved about the pulley B9, in correct operating relationship to the pulley. This cord guide (see Fig. 2) has

openings

92, 62 on the back side of the guide for lateral insertion of the cord 8| within the guide, as explained in said U. S. Patent No. 2,430,579.

The tilt cord BI is provided with

customary tassels

84, 84, and it may also be provided with stops 85, when the tilter is self-adjusting as described in my Patent 2,174,994, issued October 3, 1939. The tilt cord 8| depends downwardly from the pulley 80 through the cord guide 19 and through a slot 86 formed in the bottom of the head bar channel 29. A particular advantage in reeving the cord flows from the fact that this slot runs around and between the

openings

82, 82 of the cord guide 19 and along the sides of and in front of the cord guide.

The first step in reeving the tilt cord 8| on the pulley 80 is to pass the doubled-back or looped mid portion of the cord upwardly through the slot 86 in front of the cord guide 19, the loop being bent forwardly as it is passed upwardly through the slot 86. Then the slot 86 permits the two branches of the cord 8| to be moved laterally around to the rear of the cord guide for lateral insertion through the

openings

82, 82 at the rear thereof. The mid portion of the cord loop is, of course, placed on the pulley 80. This construction permits the

tassels

84, 84 and the

stops

85, 85 to be placed on the tilt cord 8| before the tilt cord is reeved on the pulley 80, thus simplifying assembly of this portion of the head-bar organization.

The tilt rod 50 mounts two or more tape rockers (Figs. 1. 8, 9 and 10), one such tape rocker for each tilt rod cradle 46. As shown in Fig. 1, each tape rocker 5| lies between the sides BI and 62 of its cradle. These tape rockers may be of any suitable form. The form shown in Figs.

8, 9 and 10 or any of the several forms described in my copending application Serial No. '771,981 may be employed. One feature of these forms of tape rockers is that there is no idle angular movement or play of rockers on the tilt rod 50. This arises from the fact that the body 38 of the tape rocker is resilient, the tilt

rod engaging arms

48, 48 thereof being initially out of line but deformable into alignment by constricting the body 38 slightly. Upon releasing the body 38, it tends to resume its original shape, causing the

arms

48, 48 to firmly grip the tilt rod 50. Pairs of short and

long fingers

53, 53 and 58, 58, respectively, serve to receive terminal loops on the upper ends of the branches of ladder tape 54. The gripping action of the rocker on the tilt rod, and the arrangement of the

fingers

53 and 58 is more fully explained in my said application Serial No. 771,981.

The tilter is provided with a worm-driven gear 81 for rotating the tilt rod 59 to effect tilting of the blind slats. Gear 81 has an axial hole of noncircular cross section therethrough for receiving and driving the tilt rod 50, the cross section of the axial hole corresponding to that of the tilt rod. In order to remove any angular play or lost motion between the gear 81 and the tilt rod 50, a wedge 89 is inserted through the hole in the pinion 81 and beside the tilt rod 50, as best shown in Fig. 4. This wedge serves to maintain the tilt rod 58 in tight contact at all times with the tilter gear 81, thus effectively removing all lost motion therebetween.

The wedge 89 may conveniently be formed as a sheet metal stamping, as shown in inverted position in Fig. 5. It has a flat base 90 of approximately the width of a flat side 9| 0f the tilt rod 50.

Inclined flange portions

92, 92 of gradual increasing width are formed on each side of the base 90 adjacent to one end thereof, these flange portions being connected by an end flange 93 which merges with flanges 92', 92.

In applying the wedge 89, it is placed against the flat side 9| of the rod 58. The wedge may be so proportioned that flanges 92, '92 and 93 all engage the flat 9|, or it may be so proportioned that

flanges

92, 92 lie outside of the flat and nest with the rod. The Wedge is then slid forwardly by hand along the rod and the small end of the wedge passed through the gear, the wedge being forced in tightly by hand. The projecting small end of the wedge is given an inverted V form, as shown in Fig. 4, to prevent accidental displacement of the wedge.

The wedge 89 also serves to resist longitudinal movement of the tilt rod 50 relative to the tilter 45 and the tilt rod cradles 46, 46. However, the wedge need not be depended upon for this function, since longitudinal movement of the rod 50 in one direction is prevented by the tilt rod retainer 64 of the remote cradle 46, while longitudinal movement of the rod in the other direction is prevented by the end brace 24 adjacent the tilter as is best seen in Fig. 2.

A cord lock 41, including a cord pulley or guide, is mounted within the head bar channel 29, usually adjacent to the right end thereof. The cord lock 41 is generally similar to that disclosed in my copending application Serial No. 731,392 with the exception of its mounting. The cord lock 41 has a body 94 (Figs. 2 and 6) from the rear edge of which a large flat mounting flange 95 projects. The mounting flange 95 is provided with a pair of

notches

96, 96 on opposite sides thereof which receive bent-over tabs 91, 91 previously struck up from the bottom of the head bar channel 29. The mounting flange 95 projects at an acute angle to the cord lock body 94, so as to incline the cord lock rearwardly as indicated in Figs. 1 and 2. The cord lock has a double groove pulley 1?. When the blind i installed one lift cord runs directly from one groove of pulley P to the groove of the pulley of one cradle 46, and another lift cord runs directly from the other groove of pulley P to the groove of the pulley of the other cradle 46.

A relatively large hole 99 is provided in the bottom of the channel 20 for passage of the manually-grasped portion of lift cords 49 (see Fig. 3). This hole is formed near the front of the head bar channel 20 and permits sidewise movement of the lift cords 49 in the usual way for actuation of the cord lock 41.

A. tongue I89 (Fig. 6) which projects from the bottom front edge of the cord lock body 94, is passed through the hole 99 and aligned against the under side of the head bar channel 20 at the front margin of the hole before tabs 91, 91 are clinched. The tongue |99 is preferably shaped in advance and merely inserted through the hole 99, the tabs. 91, 91 preventing the cord lock body 94 from shifting. Projecting prongs Nil, Nil on the tongue I90 lies immediately above the bottom of the head bar channel 29 and engages the margin of the hole 99. The tongue I98 serves the dual. purpose of providing a more rigid mounting for the cord lock 41, particularly resisting upward or downward pull on the cord look by the lift cords 49 upon operation of the blind, and also furnishing a smooth bearing at the front side of the hole 99, preventing fraying 0f the lift cords.

In the above-described head bar assembly, the tilt cord 8| projects through the slot 86 in the bottom of the channel 20, and the lift cords 49 project through the hole 99 in the channel. The slot and the hole 99 are placed a far forward in the channel 20 as practicable. To prevent contact of the cords depending through these openings with the topmost of the blind slats 11, the ladder tapes (and consequently the assembly of slats) have been moved backwardly relative to the head bar channe 20 by the distance q of Fig. 2, as already pointed out. This construction prevents interference by the cords with tilting of the top blind slat TI as Well as promoting easy operation of the blind.

The head bar assembly herein described may be mounted in position adjacent a wall opening by means of the mounting brackets I02 and I04 (see Figs. 1, 4 and '7). The mounting brackets I02 and I04 are similar in construction and used in pairs, one being a right-hand bracket and the other being a mirror reversal or left-hand bracket. For convenience of description, only one bracket will be described, similar parts being denoted by the same reference numeral.

The bracket IE2 or I04 (Figs. 4 and 7) comprises a flat metal plate I05 having a bottom flange Hit, a back flange I01 and a top flange I09. An outwardly projecting bump I03 may be provided on plate I05 to act as a separator during el ctroplating. Screw holes III! are provided in the plate I05 and the back and top flanges I! and I09, to receive screws or other fasteners for mounting the bracket on the lintel of a window frame or on the side of the jamb for a so-called inside mounting of the blind, or on a vertical wall or on the front of a window jamb for a so-called outside mounting of the blind. In addition, a forwardly-projecting filler or spacer I I 2 may be provided in. the back flange ti l so that the head bar 20 will be tightly retained within the bracket without necessityfor counter-sinking, and whether round or flat head screws be used, or whether no screws be used in the back flange as in an inside mount. In this connection see my U. S. Patent No. 2,526,393.

A retainer II4 is swingably mounted on the front top corner of the plate I05 by a rivet N5. the retainer when in closed position serving to retain the head bar within the bracket. The retainer I'M is generally L-shaped in transverse cross section, one leg or flange H3 of the retainer lying closely against the inside of the plate I05. The flange IIil of the retainer is offset slightly along its front edge to provide a narrow shoulder at II'I adapted to close against the front edge of the plate I35.

A slot 559 formed in the lower portion of the retainer flange H8 defines a projection I26 of length somewhat shorter than the retainer flange lit. The projection I20 cooperates with an inclined surface IZI formed on the bottom flange I 96, the surface It'I engaging the end of the projection I20 and forcing the flange H6 of the retainer sidewise tightly against the plate I05 upon closing movement of the retainer. The other leg or flange H3 extends laterally from the plate Ice of the bracket, retaining an end of the head. bar in position on the bottom flange hit when the retainer 554 is in closed position.

A latch is provided between the retainer H3 and the plate "12 5. This latch includes a depression I22 formed adjacent the shoulder at II! of the retainer, which depression makes snap engagement with a projection IZt formed on the front edge of the plate I535. The sidewise mov ment of the retainer Ila against the plate Iiiii upon closing movement of the retainer causes firm engagement of the latching elements above described, well as maintaining the retainer tightly against the plate at all times, even after normal wear over a long period of use has occurred. A notch 525 is provided in the front 10 edge of the bottom flange I06 to receive the blade of a screw driver Or other prying instrument for opening the retainer H4.

By making flange I06 and H8 a little over 1" wide, the head bar can have a tolerance of 1" in length without danger of dropping out of the brackets I02 and I04. Thus, by making the head bars in standard lengths in increments of 1", all width windows between the shortest and longest head bar can be taken care of. Where the head bar is shorter than the spacing of plates I05, I05 of the two mounting brackets I02 and I04, the excess space is filled up, and the head bar centered with respect to the brackets, by bending outwardly as required fingers 30 (Fig. 4) of the braces 24 at the opposite ends of the head bar.

One or more intermediary head bar supports I26 (Figs. 1, 13 and 14) may be used for supporting the head bar along its length. Such supports are not ordinarily required for shorter head bars, but are often required or desirable where the blind i wide and the head bar correspondingly long.

The intermediary support I26 comprises a bracket I21 and a head bar engaging member I29. The bracket I21 may be formed as a sheet metal stamping having a vertical flange I30 and a forwardly-projecting horizontal flange I3I at top of the vertical flange. Flanges I30 and I3I are provided with a plurality of holes I32 for receiving mounting screws or other fasteners, the flange I30 being used for mounting on a vertical surface and the flange I3I being used for mounting on the under side of a horizontal surface. A substantially horizontal tongue I33 projects forwardly from the flange I3I, being slightly offset downwardly from the plane of this flange. The tongue I33 serves to carry the head bar engaging member I29 of the support, having transverse serrations at I34 to prevent accidental disengagement of these parts.

The head bar engaging member I29 is formed of a fiat plate I35 having a pair of upturned inwardly-directed edge flanges I36, I36. A centrally located bail I3! is struck up from plate I35, this bail being adapted to slip over and be engaged by the serrated portion of the tongue I33 of the bracket I2'I. Upturned end flanges I39, I39 serve to reinforce the plate I35 against bending.

The spacing of the flanges I36, I36 is such that the head bar engaging member I 29 may be placed within the channel 20 and moved upwardly to engage the beads 2!, 2!, flanges I30, I36 entering within the beads, as shown in Fig. 14. To engage the member I29, the beads ZI, 2| must be shifted slightly toward each other, as by hand pressure exerted on the vertical walls of channel 20. After insertion of the flanges I36, I36 into the beads, the collapsing pressure on channel 20 is removed and the inherent resilience of the channel causes the beads 2I, 21 to return to initial position and retain the member I29 in position.

The head bar support I26 serves to support equally both sides of the head bar and is readily mounted at any point along the head bar without the use of special tools. It is substantially invisible, occupying a space slightly above and to the rear of the head bar. The member I29 serves the additional purpose of engaging the beads 2i, 2I of the head bar channel 20 so as to brace the sides of the channel against inward or outward deflection, thereby performing bracing functions similar to those of the top or intermediary brace 39.

I claim:

1. In a Venetian blind head bar organization, a channel-shaped head bar having open, inwardlyturned rounded marginal longitudinal beads and an intermediary brace comprising a sheet metal stamping having a rigid intermediary portion extending between opposite exterior surfaces of the beads and terminating in ends contacting said beads, and having resilient terminal portions extending within the beads and terminating in portions extending chordally within the beads, the resilient terminal portions pressing the beads against the ends of the intermediary portion.

2. In the art of Venetian blinds, an intermediary brace for a channel-shaped head bar having open, inwardly-turned marginal longitudinal beads, said brace comprising: an elongated sheet metal stamping having a rigid intermediary portion adapted to be positioned transversely of the head bar and spanning the open side thereof, and resilient U-shaped terminal portions adapted to be entered within the beads to press the exterior surfaces of the beads against the intermediary portion of the brace.

3. In the art of Venetian blinds, an intermediary brace for a channel-shaped head bar having open, inwardly-turned marginal longitudinal beads, said brace comprising: an elongated sheet metal stamping having a rigid intermediary portion adapted to be positioned transversely of the head bar and spanning the open side thereof, and resilient U-shaped terminal portions located at the ends of the intermediary portion and adapted to be entered within the beads to press the exterior surfaces of the beads against the intermediary portion of the brace, the terminal portions being provided with ends for spanning the interior of the beads to aid in retaining the brace in assembled relation with the head bar.

4. In the art of Venetian blinds, an intermediary brace for a channel-shaped head bar having the longitudinal edges of the channel turned inwardly and formed into generally cylindrical marginal beads which are open at their bottoms, said brace comprising: an elongated sheet metal stamping adapted to extend transversely of the head bar, the stamping including a rigid intermediate portion provided with bead-abutting portions for engaging the confronting exterior surfaces of said marginal beads, the stamping also including resilient U-shaped terminal portions adapted to be entered within the beads to hold the beads against said bead-abutting portions of the brace.

5. In the art of Venetian blinds, an intermediary brace as in claim 4 in which the rigid intermediate portion of the brace is channel shaped and the ends of the side walls of the channel constitute the bead-abutting portions of the brace.

6. In the art of Venetian blinds, an intermediary brace as in claim 4 in which the portions adapted to be entered within the beads include lateral projections having reduced cross-section connection to the remainder of the terminal portions.

7. In the art of Venetian blinds, an intermediary brace as in c1aim 4 in which the rigid intermediate portion of the brace is channel shaped, the ends of the side wall of such channel constitute the bead-abutting portions of the brace,

and the portions adapted to be entered within the beads include lateral projections having reduced cross-section connection to the remainder of the terminal portions.

8. In a V netian blind head-bar or anization, a channel-sha ed head her having the longitudinal edges of the c annel turned inwa dlv and formed. into generally cvlindrical mar inal beads whi h are open at their bottoms. and an intermediary brace compri ing: an elongated sheet meta stam ing extendin transversely of the head bar, the stam ing inclu ing a rigid intermediate portion nrovided with bead-abutting portions which engage the exte ior surface of said marginal beads, and the stamping also including terminal portions entered within the beads and operative to hold the beads against bead-abutting portion of the brace.

9. In a Venetian blind head-bar organization, a channel-shaped head bar having the lon itudinal edges of the channel turned inwardly and formed into generally cylindrical marginal beads which are open at the bottom, and an intermediary b ace comprising an elongated. sheet metal stamping having a ri id intermediate portion of channel-shaped form extending transverselv of the head-bar. the stamping including head-barabutting portions in. engagement with the sides of the head-bar channel adjacent its up er edges, and. resilient retaining portions at the ends of the intermediate portion snapped into said beads of the head bar.

10. In the art of Venetian blinds, an intermediary brace for a channel-shaped head bar having the longitudinal edges of the channel turned inwardly and formed. into generally cylindrical marginal beads which are open at their bottoms, said brace comprising: an elongated sheet metal stamping adapted to extend transversely of the head bar. the stamping including a rigid, channel-shaped intermediate portion, the ends of the side walls of which constitute beadabutting portions for engaging the confronting exterior surfaces of said marginal beads, the stamping also including terminal portions adapted to be entered within the beads to hold the beads against said bead-abutting portions of the brace.

11. In the art of Venetian blinds, an intermediary brace as in claim 10 in which the portions adapted to be entered within the beads include lateral projection having reduced cross-sectional connection to the remainder of the terminal portions.

HARRY NELSON.

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

UNITED STATES PATENTS Number Name Date 1,973,933 Shehan Sept. 18, 1934 2,010,286 Wiener et al. Aug. 6, 1935 2,038,776 Wiener et a1 Apr. 28, 1936 2,090,239 Strang Aug. 17, 1937 2,180,311 Nisenson Nov. 14, 1939 2,207,517 Ganke July 9, 1940 2,223,633 McKerlie Dec. 3, 1940 2,247,321 Stuber June 24, 1941 2,262,949 Lorentzen Nov. 18, 1941 2,267,160 McKerlie Dec. 23, 1941 2,298,538 McKerlie Oct. 13, 1942 2,410,549 Olson Nov. 5, 1946 2,435,838 Mackin Feb. 10, 1948 2,455,135 Nelson Nov. 30, 1948 2,465,246 Mackin Mar. 22, 1949