US1091103A - Tensioning device for shade-rollers. - Google Patents

Description

J. ,A. WOOTON.

TENSIONING DEVICE FOR SHADE ROLLERS.

APPLICATION FILED FEB.8,1912.

1,091,103, Patented Mar. 24, 191 i /5 /9 M r g Z5 Z4 /fa JOHN A. woo'ron, or Foia'r MEADE, FLORIDA.

TENSIONIN G DEVICE FOR SHADE-ROLLERS.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application filed February 8, 1912. Serial No. 676,209.

To all whom it may concern Be it known that I, JOHN A. WooroN, a citizen of the United States, residing at Fort Meade, in the county of Polk, State of Florida, have invented certain new and useful Improvements in Tensioning Devices for Shade-Rollers; 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 new and useful improvements in tensioning devices for shade rollers.

An object of this invention is the provision of a tensioning device for shade rollers which is of such construction that the cus tomary curtain springs can be dispensed with.

Another object of this invention is the provision of means whereby a shade roller may be rotated for the purpose of winding or unwinding the shade thereon, and means for tensioning the said roller whereby the same will be held against rotation thereby retaining the shade in its adjusted positions.

A still further object of this invention is to improve and simplify devices of this character, rendering them comparatively simple and inexpensive to manufacture, reliable and eflicient in use and readily operated.

With the above and other objects in view, this invention resides in the novel features of construction, formations, combinations and arrangements of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which:

Figure 1 is a front elevation of a window frame having a shade roller mounted thereon with my invention applied to the latter. Fig. 2 is a vertical transverse sectional view taken on the line 22 of Fig. 1, and Fig. 3 is a similar view taken on the line 33 of Fig. 1.

Referring to the accompanying drawing by similar characters of reference throughout the several views, the numerallO designates generally a portion of a window frame which is provided at its opposite sides with the usual shade brackets 11 in which is journaled a shade roller 12 which supports the customary curtain or shade 13.

The roller 12, at one end, is somewhat reduced as shown at 12 to produce a circumscribing flange 15, and the roller is then further reduced to provide an extensionl2, as shown in Fig. 3. A grooved pulley 24, is keyed upon the reduced portion 12 of the roller 12, lying against the shoulder formed by the end of the reduced portion 12*, and thus in spaced relation to the shoulder 15, forming a circumscribing groove 15, in which is normally located the arcual arm 16 formed upon the forward end of a shank 17 which extends laterally from the supporting plate 18 attached in any suitable manner to a convenient portion of the window frame 10.

An arcual arm 19 is pivotally connected as indicated by the numeral 20 at its inner end to the inner end of the arm 16 and is located in vertical movement within the circular groove 15 to and from the before mentioned arm 16 to frictionally engage the shade roller 12 for the purpose of retarding its rotary movement and retaining the shade 13 in its various adjusted positions.

A shank 21 extends rearwardly from the arm 19 adjacent its pivotal point and is adapted to lie in registration with the shank 17. The shank 21 is provided with a vertically disposed threaded opening 22 in which is located a threaded pin 23 arranged for engagement with the shank 17 providing a means whereby upon the rotation of this pin 23 the arcual arm 19 will be moved to and from engagement with the arm 16 for friction engagement with the shade roller.

The grooved pulley 24 has extending from the oppositesides of its groove 25 a plurality of interlocking teeth 26, the said teeth 26 upon each side of the groove extending between the teeth. formed upon the oppositeside thereof, and further being arranged to engage an endless cable 27 for the purpose of preventing the same from slipping.

The opposite lap of the cable 27 passes over a similar pulley 28 which can be rotated through the medium of a crank 29 or otherwise to adjust the shade 13 to its various positions.

The curtain 13 may be operated by means of the usual finger grip 30.

From the foregoing disclosures taken in connection with the accompanying drawing, it will be manifest that a tensioning means of the nature described is provided for which will fulfil all of the necessary requirements of such a device.

It should be understood in this connection that various minor changes in the details of construction may be resorted to within the scope of the appended claim Without departing from or sacrificing any of the advantages of the invention.

Having thus fully described this invention what I claim as new and desire to protect by Letters Patent, is:

The combination with a shade roller having a slightly reduced portion at one end, and a further reduced portion beyond the slightly reduced portion, of a tortuously grooved pulley engaged with the secondmentioned reduced portion and lying against the first-mentioned reduced portion, said pulley being of greater size than the first-mentioned reduced portion, to form a circumscribmg groove between the pulley and the main portion of the shade roller,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C."

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