US1786512A

US1786512A - Automatic shade-roller stop

Info

Publication number: US1786512A
Application number: US366712A
Authority: US
Inventors: Bevill W Whitworth
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-05-28
Filing date: 1929-05-28
Publication date: 1930-12-30
Anticipated expiration: 1947-12-30

Description

,Dec. 30, 1930. B. w. WHITWORTH- 1,786,512

AUTOMATIC SHADE ROLLER STOP Filed May 28, 1929 Patented Dec. 30, 1930 the STATES BEVILL W. WHITWORTH, 0F OMAHA, NEBRASKA AUTOMATIC SHADE-ROLLER STOP Application filed May 28, 1829. Serial No. 866,712.

The invention relates to self stopping attachments for shade rollers and has for its object to provide an attachment of this character which may be applied to a spring actuated shade roller of any conventional form, whereby its upward movement will be automatically restrained and brought to a stop at a predetermined position, thus avoiding the annoying tendency to slip away from the hand of an operator and fly up so as to injure the shade and cause the spring to lose its tension.

A further object is to provide an attachment that may be readily applied by dealers 5 at the time of fitting and hanging the same,

and by manufacturers without modifying a y of the active parts heretofore employed by them, and which will comprise but a few parts that can be produced and applied at a 20 trifling expense.

A further object is to provide means whereby a bracket engaged lead screw axially disposed as a pivotal shaft within the springless end of a shade roller is provided with right and left threaded nuts having wings engaging longitudinal slots provided within the opposite sides of the said roller, and which, when the roller is revolved during an upward movement of the shade, are forced against an intermediate spring cushion so as to absorb the shock at contact and thus stop the rotation of the roller.

A further object is to provide means whereby the opposing force against the upward movement of the shade roller may be applied gradually against the rotating movement of the roller so as to avoid end thrust of the pivotal shaft against any part thereof, thus avoiding the inconvenience of thrust hearings or Washers. This as the advantage of permitting a depth of bore suiiiciently beyond the length of the screw to permit shortening for adjustment to windows of various widths, preferably sufficient to cover the difference between contiguous standard widths.

With the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth shown in the drawing described and claimed, it being understood that changes in the procise embodiment of the invention may be made within the scope of what is claimed Without departing from the spirit of the invention. i

In the drawing:

Figure l is a lon itudinal sectional view through the roller. V

Figure 2 is a perspective View of the springless end of the roller, showing position of the slots and bore in the roller.

Figure 8 is a sectional view on line 33 of Figure 1.

Figure 4- is an end view of Figure 1.

Figure 5 is aperspective View of the shade roller. I I

Referring to the drawing, the numeral 1 designates a' conventional form of shade roller, one end of which is provided with a rotatable pintle 2 of the conventional form, which is received and held against rotation in a bracket 3 of usual construction. Disposed within the roller 1 is a coiled spring at, of conventional construction, for imparting rotation to the roller for winding the shade on. the roller; this particular typefif the operator loses control of the shade the roller rapidly rotates,

winding. the shade around the same and unwinding-the roller; and damages the shade, and to obviate this difficulty the limiting means hereinafterset forth is provided.

The shade rollerlimi'tingdevice comprises a shaft 5 which is held against rotation by means ofthe bracket 6, in the notch 7 of which the flattened portion 8 of the shaft is received. Shaft 5 extends axially into the bore 9 in the end of the; roller and is provided with a right hand threaded portion 10' and a left hand threadedportion 11. Threaded on the portions "10 an llf are slidable cylindrical In shades and rollers of members 12 which slide within the bore 9 axially towards and away from each other according to the direction of rotation of the roller. Opposite sides of cylindrical members 12 are provided with outwardly extending. lugs 13 which are slidably mounted in the longitudinal slots 14 of the roller end at opposite sides of the bore 9, therefore it will be seen that when the shade 15 is unwound, the members 12 will be moved away from each other, and when the shade 15 is wound on the shade roller, incident to the rotation of the roller by the coiled spring 4, the cylindrical members 12 will be fed towards each other.

If, during the raising of the shade 15, the operator loses control of the same, the rotation of the roller 1 will cause the slidable members 12 to rotate on their respective threaded portions 10 of the shaft 5, and as the threads are reversed the members 12 will be forced towards each other and into engagement with opposite ends of the coiled spring 16, thereby compressing the spring 15 so there will be a yielding stopping of rotation of the roller, thereby absorbing the shock. Coiled spring 16 is slidably mounted on the shaft 5, therefore it will move axially so that it will only be compressed when both ends thereof are engaged by the members 12 and is self adjusting in this respect, and it will only be necessary for the operator to adjust the slidable members 12 to proper positions when hanging the shade.

The outer end of the roller 1 is provided with a channelled ferrule 17, in the channel 18 of which the semi circular ends 19 of the. roller are 'received and held against inward movement towards each other which would bind the slidable members 12 or against spreading movement which would interfere with the positive operation of the device. It will be noted that the bore 9 extends beyond the inner end of the threaded shaft 5, thereby allowing a wide range of adjustability so that the roller can be applied to windows of varying widths and to brackets 3 and 6 which may vary as to distance from each other.

From the above it will be seen that a shade roller stop is provided which is simple in construction, the parts reduced to a minimum and one which may be easily and quickly ad justed and applied to rollers now in use Without materially varying the construction thereof.

The invention having been set forth what claimed as new and useful is:

A spring actuated shade roller having a bore at one end and longitudinal slots opening into the bore, means for limiting the retation of said roller in its winding direction, said means comprising a stationary shaft extendng axially into the bore in the roller in which the stationary shaft is disposed, said shaft having right and left threaded portions,

BEVILL \VHITWORTH.