US1329092A - Shade-roller lock - Google Patents

Description

W. C. MOORS.

SHADE ROLLER LocK.

APPLICATION FILED NOV. 4, 1919- Patented Jau. 27, 1920.

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WITNESS eff ., UNITED sTATEs PATENT oEEioE.

WALTER C. MOORS, OF OWENSBORO, KENTUCKY, ASSIGNOR OF ONE-THIRD T 1V. I. PEDLEY ANI) ONE-THIRD TO ERNEST NORRIS, BOTH OF OWENSBORO, KENTUCKY.

SHADE-ROLLER Look.

Application filed November 4,1919.

To` all 'whom t may concern:

Be it known that I, WALTER C. Moons, a citizen of the United States, and resident of Owensboro, in the county of Daviess and State of Kentucky, have invented cert-ain new and useful improvements in Shade- Roller Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a. shade roller lock, and is particularly an improvement over the device shown in my Patent No. 1,242,362 granted Oct. 9, 1917.

It is the object of this invention to improve the lock to avoid the accidental locking of the roller during normal Yspeeds of rotation thereof, yet to assure of the locking of the roller should it rotate at an excessive speed, so as to avoid the t flying up and injury to the shade.

A further object is the provision of a lug or stop finger extending from a shade roller bracket, and a dog so mounted on the roller as to engage said lug should the roller rotate at an abnormal. speed in winding up the shade, in order to lock the roller and prevent possible tearing of or injury to the shade.

A still further object is the provision of a novel and improved mounting for the dog on the end of the roller to assure of the proper functioning thereof, and to enable the device to be readily applied to shade rollers already in use.

1V ith the foregoing and other objects in view, which will be apparent as the description proceeds, the invention resides in the construction and arrangement of parts hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein Figure 1 is a front view of the improved shade roller lock.

Fig. 2 is a cross section on the line 2-2 of Fig. 1.

Fig. 3 is a longitudinal horizontal section on the line 3 3 of Fig. 1.

In the drawing, there is illustrated a portion of the shade roller 1 on which the shade 2 is Wound, said roller being provided at one end (not shown) with the usual pawl Specification of Letters Patent.

Patented Jan. 27, 1920.

serial no. 335.632.

4and ratchet device which releases by centrifugal action to permit the shade to be 'wound up as usual. The end of the roller shown has a pivot pin or spindle 3 mounted for rotation in the bracket 4 as usual, and this end of the roller is provided with the lock.

1n carrying out the invention, the bracket 4 is provided with a lug or stop finger 5 eX- tending at right angles therefrom parallel with and at one side of the axis of the roller 1, for the engagement of the dog 6 which is pivotally connected to the end of the roller 1. This dog 6, as shown, is disposed loosely between a pair of disks 7 and S, and is pivotally mounted on a pin yor rivet 9 secured to said disks. The disk 7 is secured to the end of the roller, and may be a part of a cap or'ferrule 10 fitted on the end of the roller. The central portions of the disks 7 and S are connected by a hub 11 through which the pin or spindle 3 entends, thereby uniting the disks. The disks can be easily applied to the end of the rollerover the pin or spindle 3 for installing the device on the shade roller, and by substituting the ordinary bracket by the bracket 4 having` the lug 5, the device is ready to function. Y The outer edge of the dog 6 is curved` as at 12, and a curved leaf spring 13 is disposed between the disks 7 and 8 and its basal end secured to a web or portion 14 connecting the disks at the periphery thereof, a pin 15 or other means securing said spring against said web. The spring 13 is located within the outline of the disks and its free end bears against the curved edge of the dog, thereby moving the dog inwardly. The dog is provided at its free end with an angular abutment 16, and between said abutment and pivot 9 has an inwardly extending portion 17 arranged to fit the hub 11 to limit the inward movement of the dog with the abutment 16 bearing against a stop 5 or rivet 18 connecting the disks 7 and 8 opposite to the web 14. rlfhe spring 13 extends `in the same general direction as the dog and has its free end overlapping the dog, so that the free end of the dog is unobstructed t0 be capable of moving outwardly from between the disks.

During the normal speed of rotation of the roller l in winding up the shade 2, the spring 13 will resist the tendency of the dog 6 to swing outwardly by centrifugal force, so that the roller will not be locked accidentally during the winding up of the shade. However, should the shade slip out of the hand or be otherwise released, as to have a tendency to iiy up or wind up at an eX- cessive speed, the increased speed of rotation of the roller will result in the added centrifugal force throwing the dog 6 outwardly so that its abutment 16 will pass over and engage the lug 5, as seen in dotted lines in F ig. :2, thereby locking the roller against further rotation. This will avoid injury to the shade, as well as avoiding the annoyance of unwindinfr same when completely wound up. By the provision of a single lug 5, the remainder of the circular path of the dog 6 is unobstructed, so that said dog is given a large arc in which it can move outwardly to a position to engage the lug 5. The portion 17 in contacting with the pin or stop 18 will limit the outward movement of the dog and, by pulling the shade downwardly, the dog 6 will retreat back into the space between the disks 7 and S under the pressure of the spring 13.

Having thus described the invention, what is claimed as new is 1. A roller lock comprising a bracket having a lug extending therefrom, a rotary member to move with the roller, a; dog carried by said member to move outwardly by centrifugal force to contact with said lug, and means for resisting the outward movement of said dog until the member exceeds a predetermined speed of rotation.

2. A, roller lock comprising a bracket for the roller having a lug extending therefrom at an angle, a member to rotate with the roller, a: dog pivotally carried by said roller to swing outwardly and move into abutment with said lugs, and a spring moving said dog inwardly and resisting the outward movement thereof until the member exceeds a predetermined speed of rotation.

3. A roller lock comprising a member to rotate with a roller, a dog carried by said member to move outwardly by centrifugal force, a bracket having a portion for the engagement of said dog when moved outwardly, and means for resisting the outward movement of said dog until the rotation of said member exceeds a predetermined speed.

il. A roller lock comprising a pair of disks, one having means for attachment to a roller, a dog pivoted between said disks to swing outwardly from between them, and a bracket having a yportion for the engagement of said dog when swung outwardly.

5. A roller lock comprising a pair of disks, one of them having means for attachment to the end of a roller, a dog pivoted between said disks to swing outwardly from between them, a bracket having a portion for the engagement of said dog when swung outwardly, and spring means between said disks moving the dog inwardly and resisting the outward movement thereof, until the speed of rotation of the roller becomes eX- cessive.

G. A roller lock comprising -a pair of disks.l one of which has means for attachnient to the end of a roller, a dog pivoted between said disks to swing outwardly from between them, a bracket for the roller having a lug entending at an angle across the edges of the disks, said dog having an abutment at the free end to contact with said lug, and a leaf spring secured between'said disks and having its free end overlapping the outer portion of said dog and extending in the same general direction as the dog, said spring moving the dog inwardly and resisting the outward movement thereof, said disks and dog having portions to limit the inward and outward movement of the doo'.

In testimony whereof l hereunto set my hand.

WALTER C. MOORS.

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