US2795271A

US2795271A - Venetian blind

Info

Publication number: US2795271A
Application number: US581992A
Authority: US
Inventors: Ernest S Angelo
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-05-01
Filing date: 1956-05-01
Publication date: 1957-06-11
Anticipated expiration: 1974-06-11

Description

Junell, 1957 ESANGELO 2,795,271

VENETIAN BLIND Filed May 1, 1956 I 2 Sheets-Sheet 1 v IIIVVENTOR. ERNEST S. ANGELO 53M Jlmwr ATTORNEY June 11, 1957 E. s. ANGELO 2,795,271

VENETIAN BLIND Filed May 1. 1956 2 Sheets- Sheet 2 INVENTOR. srmzsr s. ANGELD film saw/4 am ATTORNEY United States Patent 2,195,271 VENETlAN BLIND Ernest S. Angelo, Providence, R. 1.

Application May 1, 1956, Serial No. 581,992

2 Claims. (Cl. 160-172) This invention relates to improvements in Venetian blinds and more particularly to the slats and the means for opening and closing the slats.

An object of the present invention is to provide an improved Venetian blind wherein the slats are removably supported but unsecured in lattice relationship.

Another object of the present invention is to provide an improved Venetian blind wherein the slats are held against the tension of a spring motor in open position and are automatically closed to a substantially closed Weather tight position when the holding cord is released.

And still another object of the present invention is to provide a Venetian blind which is built into the easement of a window. The casement serving as a guide to prevent the slats from swinging from side to side and back and forth.

And still a further object of the present invention is to provide a Venetian blind in which the individual slats rest in horizontal position with the concave surface up and the convex surface down.

Other objects of the present invention will become apparent in part and be pointed out in part in the following specification and claims.

In the past Venetian blinds were hung in window easements.

Similar reference characters designate similar parts in the several views, in which:

Figure 1 is a perspective view of the new and improved Venetian blind showing the slats in open position with the top cover removed.

Figure 2 is a horizontal cross sectional view taken along line 2-2 of Figure 1 and shown with the top cover in position.

Figure 3 is a transverse cross sectional view taken along line 33 of Figure 2 looking in the direction of the arrows showing the slats in open position.

Figure 4 is a transverse cross sectional view similar to Figure 3 showing the slats in closed position.

Figure 5 is a transverse cross sectional view taken along line 5-5 of Figure 2, looking in the direction of the arrows.

Figure 6 is a fragmentary exploded perspective view of the left hand casement and casement top broken away for clarity.

Figure 7 is a schematic view showing the layout of the control cords.

The present invention as illustrated comprises a left hand casing 10 consisting of a front strip 11 and a parallel rear strip 12, folded over on their top edges and fastened together along a line 13 as by welding to form an inverted U shaped channel. A back strip 14 fastened to both front strip 11 and back strip 12 throughout their length projects beyond their top edges to form a projected area having a bearing 15.

Right hand casing 16 is constructed in a similar manner to left hand casing 10 and consists of front strip 11A, rear strip 12A, back strip 14A and bearing A.

lice

A rod or shaft 20 having two

cross arms

21 and 22 integrally formed thereon is provided with a pulley 23 having two

grooves

24, 25. Shaft 20 is rotatively mounted in

bearings

15, 15A. A'coil spring 26 is fixed in groove 24 at 27 on one end and is fixed in rear strip 12 at 28 on the other end. A chain 30 is fixed to cross arm 21 at 31 on one end and is fixed to cross arm 21 at 32 at the other end. Similarly, a chain 33 is fixed to cross arm 22 at 34 on one end and is fixed to cross arm 22 at 35 at the other end.

Chain 30 is provided with a series of

cross bars

41, 42, 43, 44, 45, etc. Chain 33 similarly is provided with a series of

cross bars

51, 52, 53, 54, 55, etc. The cross bars are secured on opposite ends to the respective chains as by spot welding, soldering, brazing, and the like.

Slats

61, 62, 63, 64, etc., are laid, unsecured on opposite ends on

cross bars

41, 51, 42, 52, etc., respectively. The extreme opposite ends of

slats

61, 62, etc., are guided in the inverted U shaped ehannel of left hand casing 10 and right hand casing 16.

A top cover is provided consisting of a U shaped channel having a base and a rear upright side 71 and a front upright side 72. Base 70 is provided with slots 73, 74 on the left hand end and slots 75, 76 on the right hand end. Front and rear upright sides are provided on op posite ends with grooves 77, 78, 79, 80. U shaped members of

spring wire

81 and 82 are provided with two

cord eyes

83, 84 and 85, 86, respectively. U shaped

members

81, 82 are yieldingly held in grooves 77, 78 and 79, 89 respectively. Base 70 rests upon the folded over top edges of front and

rear strips

11 and 12 on one end and on the folded over top edges of front and rearstrips 11A and 12A on the other end with the front and rear upright sides 72, 71 abutting back strip 14 on one end and back strip 14A on the other end. In this manner a cover is provided for shaft 20 and the mechanism associated with the shaft. Front strips 11 and 11A and front upright side 72 blend into a smooth, attractive insert within a window casing, generally indicated at 87. Slots 73, 74 permit chain 30 to pass through base 70. Similarly slots 75, 76 permit chain 33 to pass through base 70.

Two lift cords having four ends are provided. Left hand lift cord consists of front section 90 and rear section 91 having U shaped section 92 supporting the lowest tilt bar 41. Front section 90 passes through

cord eyes

84 and 85. Rear section 91 passes through

cord eyes

83 and 85. Right hand lift cord consists of a front section 93 and a rear section 94 having a U shaped section 95 suporting the lowest tilt bar 41. Front section 93 passes through cord eye 85. Rear section 94 passes through cord eyes 83 and 86. Slots 73, 74 permit

lift cord sections

90, 91 to pass through base 70. Similarly slots 75, 76 permit

lift cord sections

93, 94 to pass through base 70.

Front sections

90, 93 and

rear sections

91, 94 are united on one end by means of a knob 96.

A pull cord 97 provided with a knob 98 on one end is secured in groove 25 of pulley 23 on the other end. Front strips 11 and 11A may be provided with

clips

100 and 101 respectively, to yieldingly grip or hold pull cord 97 and the cord ends united by knob 96, respectively.

In

operation back strips

14, 14A may be secured to a window casing as generally indicated at 87, by means of screw. Coil spring 26 will yieldingly hold pulley 23 and therefore shaft 20 and cross

arms

21, 22 in the position shown in Figure 4. The arrow indicates the directon of pull of the spring.

Chains

30 and 33 through

cross arms

21 and 22 respectively, are tilted with respect to one side of the chain to the other side of the chain. Cross bars 41, 42, etc., and 51, 52, etc., are likewise tilted causing

slats

61, 62, etc., to slide and tilt on the respective cross bars to a position wherein the slats are vertical, hence 3 the blind is tightly closed to light because one end of the, slot resting on its own cross bar contacts the bottom edge of the next above cross bar.

Pulling pull cord 97 in the direction to rotate pulley 23 in the direction of the arrow in Figure 3, rotates, cross

arms

21, 22 to' a horizontal position wherein

chains

30, 33 are equalized, one side to the other so that

cross bar

41, 42, etc., 51, 52 etc., are also horizontals Slats 61, 62, etc., are in horizontal or open position. Pull cord 97 may be fastened in clip 100 to hold pulley 23 in selected position between having the

slats

61, 62 etc, fully opened or fully closed.

Pulling knob 96 will cause stacking of the tilt bars and slats from the lowermost tilt bar upwardly as is well known in the art. Knob 96 may be pulled regardless of the tilt or angle of

slats

61, 62 etc., as the tilt bars and slats will stack.

Having illustrated and described a preferred embodiment of the present invention, by way of example, but realizing that structural changes could be made and other examples given without departing from either the spirit or scope of this invention.

What I claim is:

l. A Venetian blind comprising a left hand and a right hand vertical channel, a shaft provided with two cross arms and a pulley, rotatably supported on opposite ends in the left hand and right hand vertical channels, respectively, a spring connected on one end to said pulley and on the other end to a vertical channel to yieldingly hold said shaft and cross arms in one preselected position, a pull cord wrapped around and secured on one end to said pulley, means on a vertical channel for securing said pull cord, said pull cord rotating said shaft to position said cross arms in preselected position between a vertical position and a horizontal position against the tension of said spring, a chain for each cross arm secured on opposite ends to a cross arm, said chains having a length approximating the length of said vertical channels, a plurality of cross bars secured on opposite ends to opposite sides of the respective chains in spaced relation, a plurality of slatssupported by the respective cross bars and guided on opposite ends by the left, hand and right hand vertical channels, respectively, the preselected position of said cross arms supporting said slats in a position from fully open to fully closed through said chains and cross bars.

2. A window blind of the Venetian type for use in a window frame with vertical sides, the combination with said frame of a left hand casing formed as an inverted U shaped channel and a right hand casing formed as an inverted U shaped channel, means to secure both said casings to the vertical sides of said frame, a shaft provided with two cross arms and a grooved pulley, rotatably mounted on opposite ends to the left hand and right hand casings, resilient means suspended between a groove of said pulley and one of said casings to hold said shaft and cross arms in one preselected position, means to rotate said shaft against the tension of said resilient means to move said cross arms to another preselected position, a chain for each cross arm secured on opposite ends to the respective cross arm, a plurality of cross bars secured on opposite ends to opposite sides of the respective chains in spaced relation, a plurality of slats supported on opposite ends by the respective cross bars and guided on opposite ends by the left hand and right hand casing channels, respectively, one preselected position of said cross arms supporting said slats through said chain and cross bars in open position and another preselected position of said cross arms supporting said slats through said chain and cross bars in closed position.

References Cited in the file of this patent UNITED STATES PATENTS 451,924 Fisher May 12, 1891 1,816,500 Steffen July 28, 1931 2,122,224 Wade et al June 28, 1938 2,231,778 Swanson Feb. 11, 1941 2,297,627 Loehr Sept. 29, 1942 2,388,000 Larson Oct. 30, 1945