US1486678A - Window shade - Google Patents

Description

March 11, 1924. mwfim E. T. PETERS WINDOW SHADE Filed June 2. 1922 Patented Mar. 11, 1924..

EDWIN T. PETERS, OF HAVRE, MONTANA.

WINDOW SHADE.

Application filed. June 2,

To all whom it may concern:

Be it known that I, EDWIN T. PETERS, a citizen of the United States, residing at Havre, in the county of Hill, State of Montana, have invented certain new and useful Improvements in Window Shades; 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 window shades, and particularly to operating mechanisms therefor.

One object of the invention is to provide a window shade having two rollers and a single length of shade cloth having its ends secured to and arranged to be wound and unwound on the rollers, with means for turning either of the rollers, as desired, to raise or lower either end of the shade.

Another object is to provide a novel mechanism for moving the rollers, which is of such a nature that the rollers will be positively held in any adjusted position, with out danger of accidentally moving from such positions.

A further object is to provide a supporting means for the rollers which consists of heavy cords connected to the window frame and to the rollers, and which are arranged to wind onto the rollers, as the shade is unwound, and to unwind as the shade is wound onto the rollers.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is an elevation of a window showing the shade mounted thereon.

Figure 2 is a vertical longitudinal central sectional view 011 the line 2-2 of Figure 1.

Referring particularly to the accompanying drawing, 10 and 11 represent, respectively the upper and lower transverse members of the window-frame 12, in connection with which the present invention is used.

Secured to the upper member 10, of the window-frame, are the springs 13, which may be used, if desired, or weights, if desired, and connected to the lower end of each of the springs is the upper end of a cord 1 1. Secured to the lower member 11, of the window-frame, are the lower ends of the cords 15. Disposed transversely of the window- 1922. Serial No. 565,391.

frame, are the upper and lower rollers 16 and 17 each having on its opposite ends, the pairs of circumferentially extending parallel flanges 18. The lower ends of the upper cords 14- aresecured to the ends of the up per roller 16, between the flanges 18, while the upper ends of the lower cords 15 are secured to the ends of the lower roller 17, be tween the flanges 18, thereof. The cords are arranged to be adjusted with relation to the spring ends 13, and to the lower member 11, of the window-frame, so that the cords will be rendered taut. The ends of the cords, which are attached to the roller ends, are arranged to be wound on the rollers, between the flanges 18, as the rollers are moved upwardly or downwardly. Extending between the rollers 16 and 17, and having its ends secured to and wound on the rollers, is a strip of shade cloth 19, the same being arranged to wind onto the rollers, while the cords un-' wind, and to unwind from the rollers, as the cords wind thereonto.

A spring wire yoke 20 having eyes :21 in the ends of its arms, is disposed with said eyes engaged on the pintles, or trunnions 22. of each roller, which pintles, or trun nions, project beyond the outermost of each pair of flanges 18. The arms of the yokes 2O normally press inwardly against the outermost of the flanges 18, so that the friction resulting from such contact, serves to hold the rollers against rotation. These yokes are made from su'liiciently heavy material to cause them to gravitate and effectively prevent rocking movement thereof with the rollers.

By reason of the fact that the upper cords 1 are anchored to the upper end of the window frame and have their lower ends secured to and wound on the ends of the roller 16. in one direction. and that the upper end of the shade web 19 is secured to and wound on the roller in a direction opposite to that of the cords 1 1, the pull of the shade web and of the cords would tend to turn or rotate the roller in opposite directions. This wouldproduee inertia in the roller. Similarly the lower cords 15 are anchored to the lower end of the window frame and secured to and wound on the ends of the lower roller 17, while the lower end of the shade web is secured to and wound. on this lower roller in a direction opposite to that of the cords 15. Thus, a pull of the cords 15, and a simultaneous pull of the lower end of the shade web would tend to rotate the lower roller in opposite directions, resulting in inertia in the roller. From the above it will be readily understood that neither of the rollers can rotate in either direction, of its own accord, it being neces sary to exert force to the roller to move it longitudinally of the window, and cause the Winding or unwinding of the shade web.

When the upper yoke 20 is grasped and pulled downwardly, the pintles of the roller 16 will rotate within the ends at the ends of the yoke, while at the same time the cords will unwind from, and the shade webwind onto the roller. Because of the fact that the yoke is weighed, upon releasing the same, it will gravitate into a depending posi tion. In this connection it might be stated that, due to the frictional contact of the eyes of the yolres, with the ends of the rollers, and the tendency of the yolres to gravitate into depending positions, the rollers will be positively held against any rotary movement which would tend to wind or unwind the shade web. Furthermore, the weight of the yokes will cause them to resist any tendency of the rollers to rotate them.

While I have described the springs or weights as being connected with the upper end of the window-frame, I wish it understood, and it will be obvious, that they may as readily be connected with the lower end of the frame, without departing from the spirit of the invention.

What is claimed is: V

l. A shade comprising a pair of rollers disposed one above the other and in paralled relation, cords secured above one roller and cords secured below the other roller, the

cords being secured to and wound on the reserve anism therefor comprising a pair of rollers disposed transversely of'a window frame, the ends of the rollers havmg peripheral flanges, cords rigidlyconnected to the lower end of the window frame and secured to and wound on the lower roller inwardly of the flanges, cords resiliently connected with the upper end of the window frame and secured to and wound on the upper roller inwardly of the flanges thereof, and weighted yokes engaged on and straddling the rollers with the arms thereof frictionally engaging the ends of the rollers, said yolres normally gravitating with respect to the rollers whereby to prevent their rotation with said rollers.

3. A window shade including a pair of rollers having a web extending therebetween and having its ends wound thereon, flexible elements wound on the ends of the rollers in directions reversely to that of the corresponding ends of the web, said flexible elements being anchored beyond the rollers,

and weighted yokes on the rollers with their arms frictionally bearing on the rollers.

In testimony whereof, I affix my signature, in the presence of two witnesses.

EDWIN T. PETERS.

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