US1956202A - Ascending window blind - Google Patents

Description

April 24, 1934 T. A. ROBINSON Er Al. 1,956,202

ASCENDING WINDOW BLIND Filed April 27, 1951 gru/ventas Patented pr. 24, 19,34

UNITED STATES PATENT OFFICE Salt'Lake City, Utah to said McGetrick said Robinson assigner Application April 27, 1931, Serial No. 533,024

3 Claims.

Our invention relates to window shades and has for its object to provide a new and efficient ascending window blind which blind is secured across the bottom of the Window'sill and which may be raised upwardly to shut oit the View through the window.

A further object is to provide an ascending window shade which is so constructed as to allow the Window to be partially or entirely closed off from view by the operator raising or lowering the shade as desired.

A further object is to provide a window shade which may be manually or automatically operated to close the window, said blind being provided with suiiicient spring strength to raise the blind the entire length of the window at once if desired or the operator may control the raising of the blind by his hand and raise it only the amount desired.

These and other objects We accomplish with the device illustrated in the accompanying drawing in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the specification forming a part of this invention and pointed out in the appended claims.

In the drawing in which we have shown the best and most preferred manner of building our invention Figure 1 is a front elevation of a window blind secured to the frame.

Figure 2 is a diametrical longitudinal section of the blind.

Figure 3 is a view of the end bracket which carries the ratchet and dog for controlling the blind.

Figure 4 is a side elevation of the housing in which the ratchet and dog are carried.

Figure 5 is a View of the double sheave wheel used over the drum end of the device.

In the drawing we have shown the window frame as A, and the sill of the window as B. To the sill of the window or the sash or frame, we then secure spaced apart support brackets 1 and 2 having a shaft 3 carried therethrough. One end of the shaft 3 carries a drum 4 having one end enlarged at 5 by which the device may be manually operated. The bracket 1 is formed at its top into a casing of two spaced apart walls 6 and 7, and between the two walls a double acting dog 8 is pivoted by a pin 9. A lever 10 controls the direction in which the dog is active and a weight 11 on the end of the dog lever normally holds the dog down to engage the teeth 12 of the ratchet wheel 14 to hold the blind in the down or window open position. The ratchet wheel 14 is formed as a side of the drum 4. On the inner side of the bracket 1 we provide a sleeve 15 to act as a bearing for the shaft and for a oating sleeve 16 which is carried around one end portion of the shaft 3. the floating sleeve 16 from the'sleeve 15 and the other end of the sleeve 16 is tapered down to the size of the shaft 3. A spring holding ring 18 is provided on the sleeve 15 to which one end of a large spiral spring 19 is secured. The spring 19 completely covers the sleeve 16 and is secured to the shaft beyond the end of the sleeve by a Cotter pin or other suitable means. The sleeve 16 is to prevent the spring from binding on the shaft when it is wound to full tension to actuate the blind. A closure thimble or cap 2O is carried on the sleeve 15 adjacent the bracket 1 and the roll 21 of the blind is carried around the shaft and spring with the end carried in the cap 20. The other end oi the roll is also carried in a cap 22 which cap 22 has a plate 23 carried therein with dogs 25 formed o-n the perimeter thereof to t into notches 26 cut in the end of the roll. The cap 22 is carried o-n the sleeve 28 adjacent the bracket 2 and the bracket 2 is permanently secured to said sleeve. The plate 23 h/as `a spiral spring 27 secured thereto and Wound around a sleeve 28 which sleeve is secured on the inner side of the bracket 2. The outer end of the spring 27 is secured to the end of the sleeve 28 by suitable means.

This provides the construction of the blind itself and the cloth of the blind is secured to the roll by suitable means and has each end secured to vertically held cables or operating strings 30 and 31, the cable 30 being secured to one end of the one side of the blind and the other end secured to the other side by suitable means. The cable 30 is carried up to the top of the window over a sheave wheel 32 and across the window over one side of a double sheave wheel 33 and down to where it is secured to the operating cable 34. The other cable 31 is carried up over the other side of the double sheave wheel 33 and down to engage the cable 34. The cable 34 is wound around the drum 4 and secured thereto by suitable means.

As shown in Figure 3 the edges of the blind may be guided by slotted guide bars 35 being mounted vertically from the brackets 1 and 2, the top ends being secured to the sheave wheel casings.

The two springs will be made of different tension wires and the spring 19 is the stronger of the two springs, being to raise the blind, the

A friction sleeve 17 spaces one end of 6 spring 27 being to act as a rewind spring to draw the blind back down onto the roll. The two springs operate the roll in opposite directions and are wound and unwound alternately as the blind is being raised and lowered.

The operation of our invention is as follows:

The sheave wheels are mounted at the top of the window frame with the cables runningv thereover and with the single cable secured to the drum 4. The rewind spring is wound to the proper tension before installing the device, and the operating tension of the spring may be varied by changing the number of turns of the cable. on the drum.

To raise the blind the operatorv releases the dog and the tension of the spring simultaneously raises the blind and winds the cable on the drum at the same time winding the rewind springz tighter. The height that the blind is raised may be controlled by the operator by handle; control and4 the blind may be held in any position by engaging the dog with the ratchet.

To lower the blind the operator pulls up on the cable or the blind may be wound down by the hand control of the drum andl may be secured in any position desired by engaging the dog with the ratchet wheel'.

Having thus described our invention we desire to secure by Letters Patent and claim:

1.I In a. vertical raise blind. the combination of a roll. mountedv in suitable brackets; aV blind on said roll cables secured to the ends ofthe said blind having their free ends carried up over sheave wheels at. the top of the. window frame and then secured to a. cable; a shaft through said the blind onto said roll; a drum secured. to saidl shaft on which said cable is wound; a spring car' ried on said shaft to wind said cable onto said drum by rotation thereof; a ratchet wheel on said shaft and a two Way dog suitably7 supported from one bracket to engage said ratchet Wheel to hold the drum from rotation in either direction as desired;` and means on said. shaft to prevent said springs from binding thereon when wound to high tension.

2. In an automatic vertical raise blind the combination of a roll, a shaft through said roll, means to secure said roll to a window frame; a drum on one end of said shaft; a blind carried on said roll; a spring to wind the roll in one direction-,x another spring to` rotate said drum; means to l'ock saidl roll and drum from rotation; a sheave wheel mounted at the top of each side of thev window, and cables attached to said blind at each edge thereof, said cables carried over said sheave wheels with the ends of said cables attached to a third cable, said third cable being carried down and wound onto said drum.`

3.. In a vertical raise blindy the combination o fy a roll. carrying. double springs on a centra-l shaft said springs being wound in opposite directions; a blind carried on said roll'; means to hold the roll from turning either` direction as desired; a drum. actuated by one of said springs, said4 drum to wind raising cables thereon or allow said cablesv to be unwoundl therefrom as desired; and cablesattached to the edges ofthe free end of said

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