US113852A

US113852A - Improvement in curtain-fixtures

Info

Publication number: US113852A
Authority: US
Publication date: 1871-04-18
Anticipated expiration: 1888-04-18

Description

itltiirr %nn5 fidarmi (time WILLIAM CAMPBELL, orNEW Yoan, N.I Y.

Letters Patent No. 113,852, dated April 18, 1871.

IMPROVEMENT `IN CU RTAlN-FIXTU RES.

*Thel Schedule Inferred to ln these Letters Patent and maldng part of the lame.

I, WILLIAM CAMPBELL, of the city, county, and State of New York, have invented certain Improvements in Shade or Ourtain-Fixtures, of which the following is a specification.`

My improvements relate especially to curtains operated in connection with spring rollersf Such have been made so as to be self-raising, or drawn up by the coiling of a spring within `the roller, and drawn down by a cord attached to the bottom slat. This is objectionable on account of the unsightliness of the long cord, made necessary by high windows, and by the considerable force which has to be applied through it to overcome-the power of the spring, which is liable to bend the roller in the center when it is long, and to pull od' the brackets.

My invention is designed to overcome these objections, and consists of the combination and arrangement of certain parts, as will hereinafter more fully be set forth. s

Figure 1 is an elevation of my improved shade-fixture, and y Figure 2 is a sectional view of the ends of the roller, showing the concave spool and the multiple-coiled spring, part of the latter being shown in elevation and part in section. l

The roller A may consist of a tin tube, or may be of wood having journals at each end, which have their bearings in the brackets B B in the ordinary manner, thatin the spring end c, g. 2, being square to hold the rod d, to which the spring is attached, froxnturning.

any convenient manner.

When desired to raise the curtain the corn is released, and the force ofthe spring, by rewinding it on the roller, draws it up.

nfor the purpose.

htweenthe bracket and roller I recess the side next the roller into the end of same, so as to form an annular chamber of suicient capacity to contain the cord when rolled up, and yet leave a narrow opening at the periphery.

I form the coiled spring H in a. series of coils placed concentrically one within another. Thus the coil 1, which is connected to the rod at i, is spun in one direction a sufficient number of turns when the coils are enlarged, as at on, and spun backward over the coil I to the place of beginning, when it may be returned in the direction of the rst, and the operation repeated as often as the internal diameter of the roller will admit; but two or three series will be found suliicient This forms a spring of very uniform and elastic action. The volutes ot' each series, reversing the inclination of those adjoining, form an eficient bearing for the support of one another, thereby obviating bending or entangling, and giving more force from the same metal, and the necessary coils for operating along curtain can be condensed into a short section of the roller.

I claim as my invention- The spring coil H, connected to the rod d, and spun upon the same in opposite directions, as ,described, in combination with the case A and cordspool E, arranged and operating together as set forth.

WM. CAMPBELL.

Witnesses:

KATE N. JONES, WHEELER W. PHILLIPS.