US613800A - Shade-roller - Google Patents

Description

No. 68,800. Patented Nov. 8, I898. E. F. HARTSHURN.

SHADE ROLLER.

(Application filed. Aug. 1.1, [897.)

(No Model.)

UNITE STATES EDMUND F. HARTSHORN, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE STEWART HARTSHORN COMPANY, OF NEIV JERSEY.

SHADE-ROLLER.

SPECIFICATION forming part of Letters Patent No. 613,800, dated November 8, 1898.

Application filed August 11, 1897. Serial No. 647,815. tNo model.)

To all whom it may concern:

Be it known that I, EDMUND F. HARTSHORN, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Shade Rollers, of which the following is a specification.

Myimprovement relates to that class of rollers known as extension-rollers, in which the roller is in separate sections or parts, one of which slides within the other, whereby the roller can be adjusted to fit windows of different widths. In such rollers the inner sliding section is usually constructed of wood, which slides within the metal tube or outer portion of the roller. As wood under the varying changes of the atmosphere is apt to swell or shrink,-this wood portion of the roller is liable to increase or diminish in diameter,andl1ence either to bind in the outer tube, so that it is difficult to slide the parts on each other to adjust the length of the roller, or to become so,

loose that the parts move and turn in each other and the roller ceases to be firm and steady.

My improvement consists in a novel con-f struction of this wooden extension-piece of the roller by which the variations in the wood due to swelling and shrinking are compensated and the roller maintained at afixed diameter and all binding or loosening of the Wooden section in the outer tube is prevented.

In the accompanying drawings, illustrating my improvement, Figure 1 is a view of the complete roller. Fig. 2 is a view of the wood extension-piece, showing my improvement. Fig. 3 is a section of the roller through the line no 00, Fig. 1; and Fig. 4 is a detached view of the spring.

a is the wooden eXtension-piece,which slides in the outer metal tube b.

In constructing the roller according to my improvement I cut a slit or cleft c in the end of the wooden section near the edge and for about two-thirds of the length of the section, so as to form a tongue or semidetached portion d along the surface of the section. In this cleft c or the space under the tongue I insert a spring 6, by which the tongue is pushed outward from the section and by means of which the tongue is caused to act as a spring and press against the inside of the outer metal tube when the wooden section is inserted in the same. As will be readcompressed or pressed inward suficiently to restore the diameter to its normal size, and if, on the other hand, the wood shrinks and becomes smaller than the outer tube the spring 6 forces the tongue cl outward sufficiently to maintain an even pressure in the tube. The tongue 6? therefore, as is seen,com'- pensates for all the variations in the size of the wooden section, yielding when the section swells and springing outward when it shrinks, and thus maintaining a fixed diameter and insuring an even and constant pressure of the wooden section in the outer tube. It is found that one such tongue or a tongue on one side of the section is sufficient to accomplish the purpose desired, the compression of the tongue on one side compensating for the swelling in all directions of the wooden section.

The cleft c, and consequently the tongue cl, may be of any form and construction desired, but I prefer the construction shown in the drawings. As there seen, the cleft is circular and is merely a saw-cleft formed by a barrelsaw, and the spring used is a curved steel band,which fits in the curved cleft and should be of such a size as to force the outer end of the tongue d slightly outward and permit the end of the tongue to be pressed inward below the circumference of the section.

What I claim is 1. In an extension-roller, in combination, an extension-piece adapted to slide in a section of the roller; aspring-section connected therewith, whereby the extension-piece is capable of expansion and compression 3 and a spring situated between the spring-section and the extension-piece, substantially as described.

2. In an extension-roller, the wooden extension-piece a, having the spring-tongue d,

curved cleft c and curved spring 6, whereby the eXtensionpiece maintains a uniform and even pressure in the roller, substantially as described.

Signed at Newark, in the county of Essex and State of New Jersey, this 10th day of June, A. D. 1897.

EDMUND F. HARTSHORN.

Witnesses:

E. L. DURGIN, GEo. GUNTHER.

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