US1630114A

US1630114A - Venetian blind

Info

Publication number: US1630114A
Application number: US41944A
Authority: US
Inventors: Walter E Duncanson
Original assignee: J G WILSON CORP
Current assignee: J G WILSON CORP
Priority date: 1925-07-07
Filing date: 1925-07-07
Publication date: 1927-05-24
Anticipated expiration: 1944-05-24

Description

y 1927' w. E. DUNCANSON VENETIAN BLIND Filed July 7. 1925 2 Sheets-Sheet 1 \Illllllll'lll 20 INVENTOR M60 75/? 501/ JON BY M ATTORNEYS til Patented May 24, 1 927.

,UNITED STATES PATENT OFFICE.

WALTER E. DUNCANSON, 01 NEW YORK, R, Y., ASSIGNOB TO THE J. G. WILSON COR- PORATION, OF NEW vomnn. Y., A CORPORATION OF VIRGINIA.

vnnn'rnn BLIND] Application med July], 1925. Serial in. 41,944.

This invention relates to Venetian blinds.

One object of, the present. invention is to improve the construction and mode of operation of the devices for tilting the slats of Venetian blinds intodifferent positions and for holding the slats in adjusted positions against wind pressure and other disturbmg forces.

Another object of the invention is to 1mprove the construction of the devices for supportin a Venetian blind in operatlve position with a view of facilitating the setting up of the blind and the dismounting of the same.

Other objects of the invention are to 1mprove the construction and arrangement of various other parts of Venetian blinds.

With these and other objects in view, the invention comprises the novel and improved features, constructions, and combinations of parts hereinafter described and particularly pointed out in the claims, the advantages of which will be readily understood and appreciated bythose skilled in the art.

The invention will be clearly understood from the accompanying drawings, illustrating the invention in its preferred form and the following detailed description of the constructions therein shown.

In the drawings Fig. 1 is a view in front elevation of a Venetian blind embodying the invention;

Fig. 2 is a plan view of the construction illustrated in Fig. 1;

Fig. 3 is a detail view in side elevation illustrating certain devices for supporting the blind shown in Fig. 1;

Fig. 4 is a view in horizontal section taken substantially on the line 4-4 of Fig. 1;

Fig. 5 is a View similar to Fig. 3, showing a modified construction;

Fig. 6 is 'a plan view of the construction shown in Fig. 5; v

Fig. 7 is a, view in vertical section taken substantially on the line77 of Fig. 1;

Fig. 8 is a view in vertical section taken substantially on the line 88 of Fig. 1;

Fig. 9 is a view similar to Fig. 8 showing certain of the parts in different positions;

Fig. 10 is a plan view illustrating certain of the parts shown in Fig. 7;

Fig. 11 isa view in vertical section taken substantially on the line 1111 of Fig. 1;

Fig. 12 is a view in vertical section taken sulastantlally on the line 12-12 of Fig.11; an

' Fig. is a view in horizontal section taken substantially on the line 13--13 of Fig. 12.

In the form of the invention illustrated in the drawings of this application, the blind comprises a series of slats, indicated at 2, suspended from a tilting bar, indicated at 4, which Is tiltingly supported upon a supporting bar, indicated at 6. In order to facilitate the setting up and dismounting of the bhnd, the ends of the supporting bar 6 are removably mounted on and secured to

end brackets

8 and 10, adapted to be secured to the sides of a window frame. Each of these brackets is provided with a substantially horizontal plate or shelf 12, upon which an end of the supporting bar rests, and the supporting bar is secured to the bracket by means of a screw 14 or other suitable fastenmg device passing through a slot 15 in the shelf 12 from the under side of the shelf and driven into the supporting bar, this slot preferably having an open end as shown in 1g. 4. To hold the supporting bar securely in place on the shelf, the shelf is provided adJacent its forward side with an elevation 16 arranged to engage the forward part of the head of the fastening device 14 when the fastening device is driven home. This will prevent the fastening device from being disengaged from the slot 15 by a forward movement of the supporting bar with relation to the bracket. The supporting bar, however, may be readily removed from the

brackets

8 and 10 upon partially withdrawing. the fastening devices 14.

In the present constructionthe tilting bar 4 is pivotally supported from the supporting bar 6 by means of

brackets

18 and 20,"secured to the supporting bar, and each providedwith a downwardly extending arm in which is formed a bearing for one of the pivot studs 22 attached to plates 23 and projecting from the ends of the tilting bar. The slats 2 are suspended from the tilting bar by means of tapes 24 attached at their upper ends to the tilting bar in the manner shown in Fig. 8.

The pivots for the tilting bar are located "with relation to the bar, so'that the bar is shoe. Thus the the brake and enables the tilting bar-to be held into different positions preferably by means of

cords

28 and 30, extending in opposite directions about the bar and each secured at its end to the bar, as shown in Fig. 7. The cord 28 extends from the tilting bar directly downwardly. The cord 30, however,extends from the bar upwardly over a ulley 32, r0- tatably mounted upon the bracket 18. Thus the tilting bar may be tilted in opposite directions by pulling downwardly on the

respective cords

28 and 30.

In the present form of the invention the tilting bar is provided with a frictionally acting brake mechanism for holding the bar in any position in which it'is tilted. This mechanism comprises preferably a brake segment 34, attached to one end of the tilting bar, and a brake shoe 36 mounted on one end of a spring arm 38 secured to the supportin" bar 6.- The brake segment 34 is provi ed with a peripheral V-shaped recess 35, and the brake shoe 36 is also V-shaped to fit into the recess 35. This construction provides a highly eflicient braking action between the brake segment and the brake shge, y the brake mechanism in any position in which it is tilted.

As shown clearly in Fig. 8, the upper part of the spring arm or plate 38 has an angular formation and bears upon the bracket 18 at the :1 ex of this angle so that it may be rocked a out its hearing. The spring plate is secured to the supporting bar by means of

screws

39 and 41 or other suitable fastening devices, of which the screw 39 passes through the plate at its bearing point and the screw 41'passes through the plate adjacent the end thereof remote from the brake pressure of the brakeshoe on out 34 may be readily adjusted by ad usting the screw 41.

The brake segment 34 is preferably located so that the central part of the braking surface of said segment is somewhatfarther from the axes of the tilting bar than the ends of the braking surface of the saidsegment. This result may be secured by locating the pivots 22 and the brake segment so that the center of the brake segment is somewhat above the axial line of said pivots, as

shown in Fig. 8. The brake segment is arranged in the manner describe with relation to the axis of the tilting bar-sot-hat the brake shoe will press with less force upon betweenthe same and the brake shoe,

the braking surface of the brake segment when the tilting bar has been tilted to its limiting position in either direction from a horizontal position. With the tilting bar in either of its limiting tilted positions, the leverage produced when either of the

cords

28 or 30 is pulled'downwardly to tilt the bar toward a-horizontal, will be less than when the bar is in any other position. This low degree of leverage, however, will be compensated for by the relatively light pressure of the brake shoe on the braking surface of the brake se ment so that the tilting bar may be readi y tilted.

The bracket 18 is preferably constructed to locate the pulley 32 in spaced relation to the brake se ment 34 so no liability t rat the cord 30 will enga e the periphery of the brake segment an jam or that said cord will become engaged between the brake segment and the adjacent arm of bracket 18. Also the cord 28 preferably is located inside of the cord 30 to prevent the cord 28 from engaging the periphery of the brake segment.

The tilting bar 40 is supported at its ends only by the

brackets

18 and 20 and the entire weight of the slats of the blind is carried by this bar. In order to prevent the central portion of the bar from sagging, the bar is provided with a link 40 for supporting the central portion on the bar. This link is itself supported and is connected with the bar in such a manner as to allow the bar to tilt substantially through an angle of 180. As shown in the drawing, the link 40 is pivolfilly connected with the tilting bar by means of a transverse bar or head 41 engaging in a recess 42 in the tilting bar, and the body of the link engages in a slot 23 in the tilting bar leading to the recess 40 and having the angular form shown clearly in Fi 11 of the drawing. The slot 43 is prefera ly shaped so that the link 40 may turn with relation to the tilting bar through an angle of somewhat over The upper end of the link 40 is supported upon a guide rod 44 secured to the supporting bar 6. This guide rod enables the link 40 to tilt with the tilting bar when the tilting bar has reached its limiting position with relation to the link 40 by reason of the engagement of one end of the slot 43 with the hnk. The ide 44 is preferably curved in an arc struc about the axis of the rod 40 as acenter. Through the combined angular movement of the tilting bar with relation to the link 40 and the swinging of the link allowed by the sliding movement of the link along the guide 44, the tilting bar is enabled to tilt through an angle of substantiall 180.

T e slats are arranged to be raised and lowered. by means of cords 46, each conthat there will be a mounted in a slot atone end of the supportnected at one end with the lowermost slat and extending upwardly through slots-in the other slats. These cords pass over pulleys 48 mounted in slots in the supporting bar, and both pass together over a pulley 50 ing bar, the cords extending downwardly from the latter pulley and preferably being secured together after leaving this pulley. Theright-hand bracket 10 which carries the supporting bar, is provided with a slot 52 having an open end to receive the portions of the cords 46 extending downwardly be yond the pulley 50. This slot greatly facilitates the setting up of the blind, since, when the supporting bar with the parts of the blind suspended therefrom, is placed on the

brackets

8 and 10, the cords will readily assume their proper location within the slot. The

brackets

8 and 10 are each provided with a portion 54, as shown inFig. 3', overhanging the supporting bar at the rear thereof so as to prevent the supporting bar from tilting.

In the modified construction shown in Figs. 5 and 6, the bracket 8, is formed with an upwardly extending portion or projection 56 in which is formed a slot 58 to receive a fastening device 60 to pass through the slot and driven into the supporting bar- 6. In this construction the head of the fastening device 60 engages .in a depression in the projection 56 when the fastening device is driven home, so that a fastening device cannot then be disengaged from a slot by an upward movement of the forward part of the tilting barfi; Upon loosening the fastening device to disengage the head thereof from the depressed portion of the projection 56, the forward art of the supporting bar may be lifted to disengage the fastening 5 device from the slot.

It is to be understood that the invention is not limited to the particular construction of the, illustrated embodiment of the invention, but that the invention may be embodied in other forms within the scope of the claims.v

What is claimed as new is- 1. A Venetian blind construction comprising a supporting bar, a bracket for the sup porting bar provided with a plate having a slot with an o 11 end in one part thereof, slats suspende from the supporting bar, a fastening device having a shank adapted to be passed through the slot and driven into the bar and a head, and an elevation on the plate arranged to engage said head to pre vent the withdrawal of the fastening device by a relative movement of the bar and bracket in the direction of the plane of said part of the plate. a

2. A Venetian blind comprising a supporting bar, a side bracket for the supporting bar formed with a slot, slats suspended from the supporting bar, a fastening device inserted in the slot and driven into the bar and having a head, and a projection on the bracket for engaging the head to prevent the fastening device from being disengaged from the slot except when said device is partially withdrawn from the bar.

3. A Venetian blind comprising a tilting bar, slats connected with the tilting bar, a sag-preventing link pivoted to the tilting bar at one end, and means for supporting to swing with the tilting bar during a portion of the movement of the bar.

4. A Venetian blind comprising a tilting bar, slats connected with the tilting bar, a

sag-preventing link pivotally connected at,

one end with the bar, and means for slidingly supporting the other end of the link to allow the link to swing with the tilting bar as the bar is tilted.

6. A Venetian blind comprising a supporting bar, side brackets for removably holding the supporting bar, one of which brackets is formed with a portion overhanging the supporting bar to prevent tilting of said bar and means spaced from said overhanging portion for securing the bar against being lifted from the bracket.

7. A Venetian blind comprising a supporting bar, slats suspended from the supporting bar, pulleys mounted on the supporting bar, cords for raising and lowering the slats passing over said pulleys, and side brackets for removably supporting the ends of the supporting bar, one of which brackets is provided with an open ended slot to receive the downwardly extending portions of said cords.

8. A Venetian blind comprising a tilting bar, slats suspended from the tilting bar, cords for actuating the tilting bar, a brake for the tilting bar, a. pulley above the tilting bar for guiding one of said cords, and means for supporting the pulley in spaced relation to the brake to prevent the jamming of the latter cord in said brake.

9. A Venetian blind comprising a tilting .bar,"a brake for the tilting bar, slats susthe other end of the link to allow the link for tilting the bar in the opposite direction extending downwardly past an upwardly extending portion of the first cord on the side of the latter cord opposite the brake.

10. A Venetian blind comprising a supporting bar having a longitudinal slot extending through one end of said bar, P1111 leys mounted in a slot in'said bar, one of which pulleys is located at the latter end of said bar, a bracket having a plate on which the latter end of the supporting bar is removably held, said plate being formed with a slot registering with the slot in the said bar and lifting cords for the blind extending over said pulleys and downwardly through the slot in said plate.

11. A Venetian blind comprising a tilting bar, slats connected with the tilting bar, means for pivotally supporting the tilting bar, one or more cords connected with the tilting bar for tilting the same, a brake shoe, and a brake member mounted on the tilting bar, engaged by said brake shoe and having its surface eccentricto the arc of rotation of the tilting bar so that the braking efi'ect will vary with the leverage produced upon pulling the tilting cords when the bar is in different positions.

12. A Venetian blind comprising a sup-. porting bar, a bracket foigholding the supporting bar having a plate upon which said bar rests, and a slot with an open end in a part thereof adjacent one side margin of the bar and a portion overhanging the opposite side margin of the bar to prevent tilting of said bar, and -a fastening device engaging in the slot for removably holding the bar in position on the bracket;

13. A Venetian blind comprising a tilting bar, slats connected with the tilting bar, means for pivotally supporting the tilting bar, cords connected with the tilting bar for tilting the same, and a brake for the tilting bar for holding the same in osition, arranged to vary the brakin e ect to compensate for the variations in leverage produced upon pulling the tilting cords with the bar in difierent positions.

14. A Venetian blind comprising a tilting bar, means for pivotally supporting the tilting bar, slats suspended from the tilting bar, a tilting cord attached to the bar and extending beneath the same, a pulley arranged forwardly of and above the bar over which the said cord passes, and a second cord attached to the bar and extendin forwardly over the same and then directly ownwardly.

15. A Venetian blind comprising a tilting bar, means for pivotally supporting the tilting bar below its center of gravity, slats suspended from the tilting bar, a tilting cord attached to the bar and extending beneath the same forwardly, a pulley arranged above and forwardly of the bar over which said cord passes, and a second cord attached to the bar and extending forwardly over the same and then directly downwardly.

16. A Venetian blind comprising in combination a. tilting bar, a series of parallel slats, connections between the slats and the tilting bar for causing the slats to turn with said bar, and a brake for holding the tilting bar in position, arranged for adjustment to regulate the frictional action of the brake.

17. A Venetian blind comprisin in combination a tilting bar, a series 0% parallel slats, connections between the slats and the tilting bar for causing the slats to turn with said bar, a brake segment attached to the tilting bar, and a relatively fixed brake shoe for engaging said segment, arranged for adjustment to regulate the pressure of the brake shoe on said segment.-

Signed at New York, N. Y., this 6th day of July, 1925.

WALTER E. DUNCANSON.