USRE7370E - Stewabt habtshokn - Google Patents

Description

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CUVR'TAINFFI'XTURES. No. 7,370; Reissued Oct. 31,1876;

IN VENTOR To all whom it may concern:

UNITED SrA'rEs PATENT Orrxcn. I

STEWART nnnrsnonn, on NEW YORK, Y v

IMPROVEMENT' iNCURTAIN-FIXTURES.

ecification forming part of Letters Patent No. 68,502, dated September-i, 1867; reissue l \lo.5,558, datd September 2, 1873 reissue No. 1,370, dated October 31, 1876; applicationfiled May 27, 1875.,

Be it knownthat I, STEWART Hnnrsnonn, of the city, coun ty, and State of New York, have invented a new and Improved Shade-Fixture; and I do hereby declare that-the following is Q a full, clear, and exact descriptionther'eof,

which will enable others skilled in the art to make and use the same, reference being had -to the accompanying drawings, forming part of this specification.

This invention relates to a new anduseful improvementin that class of shade-fixtures in which the shade-roller is provided with a spiral spring for automatically winding up the shade.

The present invention in an iinprove'ment'on a shade-fixture of this class for; which Letters Patent were granted to me, hearing date 00 tober 11, 1864, and reissued August 27, 1867,

e in which the pawl and ratchet or notched hub designed and used to arrest the rotation of and hold the roller were arranged to act aulines, the position of the pawl and notched Similar letters of reference indicate'"corre spending parts, r

A represents a'win dow -shade, and B the 'roller to which it is attached, the' roller having a spiral orother spring, O,fitted withinit',

and arranged in such a manner that it will have, when not restrained, a tendency to roll up the shade. The springattach ment, as represented, is the same as shown-and described in my original Letters Patent. The roller B is provided w-ith'journals an, to one of vwhich, f a, sometimes called a spindle, a hub, D, is

keyed, said hub having a notch, 6, made init, as shown clearly in Fig. 2.

fiat sides at its outer end, asshown by dotted.

, The journal or; spindle a of the roller is square, or has two" desired position or point within the scope of lines in Fig. 2, to fit into a bracket, E, attached to the window-frame, and this journala does not turnwith the roller; buttheotherjournal, a ',is fitted firml'y in a head, 0, in the roller, and

tomaticallyyand in such a manner that the shade could be stopped and retained atany its movement, by simply manipulating the v use of side cords or counterpoises.

shadeand varying the speed of the rotation of the roller, and thereby dispensing with the scribed and illustrated in such patents. the notched hub was attached to or made a part of the roller, while the pawl was fixed to one the pawl and notched hub are disconnected andthe spring nnwinds, whiehh-as again to be wound'up-previous to replacing the roller in it's bearings.

In the present invention the-pawl is hinged or pivoted as in the said patent referred to;

I but such pawl is placed on the end of theroller,

- or a part fixed thereto, and revolves with it,

and the' notched hub or ratchet is placed upon the spindle or stationary part of the fixture.

Such arrangement of parts also permits the roller to be taken fromits brackets without the spring unwinding. s

In the accompanying sheet of drawings, Figi I ure 1 is a longitudinal central section of a rollor employing my invention, taken in the line w m, Fig. 2; Fig. 2; a transverse section of turns with it, and to such headthe case of the rollerja metallic tube,jd) is attached, the journalor spindle a, or an extension, a", thereof,

being fitted loosely in the head 0, so that the roller mayturn without the jou-ruala, as will j be fully understood by referring to Fig. 1. Theend of the case or tube d of the, roller has a disk, c, Figs. 2 and 3, secured in it,and this disk, as the roller B rotates, turns with it, and loosely on the fixed journal (1. This disk .8 has a pawl or detent, )3, attached to its in; .ner side, as shown more particularly in Figs.

2 and 3, and such pawlor deteut, when engaged with thenotch b in hub D, retains or holds the roller B, so that it cannotturn u uder the influence of the spring 0, and roll up the shade A. Snchpawl or detent F is pivoted or hinged to the disk 0, students substantially at right angles to the notched hub or spindle a 'b. The spring, when fitted in the case d, is attached at one end to the head 0, and by the other end to the fixed journal or spindle a, or to its eitension a", and the spring is woundupby pulling dowh the shade B; consequently, when the shade is fully down the spring will have a tendency to wind it up.

keep it in position.

The pawl or detent F engages itself with, and disengages itself from, the notched hub D antomatically. e

In the construction shown in thedrawing, in order to insure the pawl engaging with the hub, the motion of the shade is simplychecked; for, by having the roller A and its disk 6 rotate slowly, the pawl-will drop intojthe notch b; but when such roller and disk are allowed to rotate rather quickly the pawl or detent will not drop intosuch notch, as its loose end will be carried, by the revolution of theroller, toward the periphery, or away'from the notched hub; hut, bychanging or checking the revolution of the roller, the pawl will at once automatic'ally drop into the notch and arrest the roller and shade. Hence theshade may beretained at any desired height without anydifilculty whatever, as in the roller described in the previous patent, by. merely varying or changing,

through the simple manipulation of the shade, the speed of the rotation of the roller, and. the

consequent movement of th' shade.

The pawl or detent F is a inged or pivoted pawl,-as distinguished from a loose pawl mow mg in a chamber or guide of some form to do not claim, generally, the arrangement of both the pawl and ratchet upon or in connection with the roller, so that the rollerfean be removed from its brackets without permitting the spring to unwind, as I believe suchan arrangement of pawl or detent an,d.ratchet,

as shown-in the patent of William Campbell, granted-to himSeptember 24, 1867, had been known previous to being made by myselfi' What is claimed as new is In a spring" shade-roller having a pawl 'or 'detent and ratchet, or their equivalent, constructed and arranged so as to engage automatically for holding the shade at any desired point or height, the combination, with a ratchet, or its equivalent, upon the stationary spindle or stationary part of the fixture, of a hinged or pivoted pawl, placed upon the end of-the roller, and acting substantially at right angles to the ratchet or notched hub.

STEWART HARTsHoRn. Witnesses: I H

s. vn. LAW, A. S. GURLITZ.

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