US188551A - Improvement in curtain-fixtures - Google Patents

Description

rJ. H. STROTHMAN.

CURTAIN-FIXTURES.

Patented March20,187'7.

S'rafrns JOHN H. STROTHMAN, OF MINNEAPOLIIMINNESOTA.

IMPROVEMENT IN CURTAIN-FIXTURES.

Specification forming part of Letters Patent No. 188,55 l, dated March 20,w 1877; application led January 18, 1877.

vTo all whom it may concern.-

Be it known that I, JOHN H. STROTHMAN, of Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and useful Improvement in Window-Shade Fixtures, which improvement is fully set forth in the following specication and accompanyof two side frames, b b, having cavities o1" bearings c c for the axles of the cord-pulley, and at webs or plates d d connecting the frames b b together, `forming bearings for a flat spring-plate, e, having scmicircular cavities or bearings y g, in which `the axle of the friction-roller B sets. This friction-pulley is made of rubber or its equivalent, and with its periphery rounded to iit the groove in the cord-pulley a, against which it is held by the spring of the plate e. One end of the axle of the cord-pulley a is extended, as' shown at h, in an oblong or square form, and ts into a similar-shaped socket, t' in the ferrule k on the end of the roller O. (See Figs. 2 and 4.)

By this means the roller and curtain may be readily removed at any time without in any manner disturbing the cord-pulley or its forced down between it and the friction-pulley B, and thence downward until it is low enough to be reached from the floor. Then, by simply pulling upon the cord, the curtain may be raisedor lowered, and the frictionpulley will hold the roller C in any position desired.

The two ends of the cord m may be fastened together', or a stationary pulley or grooved wheel may be secured to the casing, to hold the cord and prevent it becoming entangled; but this is not necessary to its perfect working. l

The friction-roller B will be made sufficiently elastic to allow any small irregularities in the cord to p-lss beneath it without disturbing it, while the vspring-plate e will be just stiff enough to hold it in place.`

The friction-roller may also be grooved slightly to t the cord, if desired.

I am acquainted with the patent of T. G. Richards, March 4, 1862, No. 34,593, which shows a friction-roller of metal, with notches l in its periphery; but I do not claim any novelty in the friction-roller itself, but confine my claim to my peculiar devices for holding the roller in place and rendering it operative.

I also claim a great advantage in the use of rubber for the roller, as its elasticity will, as before stated. allow it to press upon the cord m under all circumstances, whether it is regular or irregular.

1t will also act much more quickly, and with less wear upon the cord, than the metal roller. I am also acquainted with the patent of Isaac W. Heysinger, October 24, 1876, No. 183,668-curtain fixtures-which, shows a square or angular pin secured to a station- -ary bracket, and fitting into a cavity in a spring-roller; but he does not use a cord'- pulley in any manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination and arrangement of the hanger'A b b, spring-plate c, frictionroller B, and cord-pulley a, arranged and operated substantially as hereinbefore specified.

2. The springplate e, arranged as dcscribed, and friction-roller B, in combination with `thecord-plllley a, as hereinbefore set forth.

3. The cord-pulley a, having the square or angular-shaped axle h, in combination with the curtain-roller C and sockel: rarranged and operating substantially as hereinbei'ore described.

In testimony whereof I have hereunto set; my hand in the presence of two `subscribing witnesses.

JOHN H. STROTHMAN.

Witnesses C. N. WOODWARD, JOHN T. HALSTED.

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