US367143A

US367143A - Samuel eabnshaw howell

Info

Publication number: US367143A
Authority: US
Publication date: 1887-07-26
Anticipated expiration: 1904-07-26

Description

s. B. HOWELL. WINDOW BLIND APPARATUS.

(No Model.)

No. 367,143. Patented July 26, 1887.

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OSWMBEQW J i N. PETERS. Plwminhugmpher, Wnshinglon, 0:04

UNITED STATES PATENT OFFICE.

SAMUEL EARNSHAW HOWELL, F SHEFFIELD, COUNTY OF YORK,

' GLAND.

WlNDOW-BLIND APPARATUS.

SPECIFICATION forming part of Letters Patent No. 367,143, dated July 26,1887.

Application filed January 27, 1887. Serial No. 225,730. (No model.) Patented in England April 16, 1886, No. 5,300.

ented in ,Great Britain by Letters Patent No.

5,300, dated April 16, 1886 and I do hereby declare that-the following is a ful clear, and

exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to improvements in apparatus for Winding up window-blinds and sustaining said blinds in any desired position, the object being to dispense with roller-springs and other mechanical details consequent upon the use of such springs. I attain this object by means of the combination of mechanism illustrated in the accompanying drawings, in which- Figuresl and 2 representback andside views of the apparatus, part of the casing being removed inthe side view, Fig. 2. Fig. Sshows an apparatus with an alteration in the gearing suitable for long blinds.

Similar letters of reference refer to similar parts throughout the several views. a

The outer casing, A, is suitably shaped t contain and support the working mechanism, andis provided with lugs B, or similar means by which it may be secured to the windowframe, having also a vertical slot, 0, for the actuating-knob to slide in, and through which it is connected to the rack E. The rack is in gear with'the teeth of the pinion F, which, with a wheel, G, is fixed upon a short axle supported by the sides of the casing. The wheel G is in gear with a second pinion, H, fixed upon the axle of the blind-roller I, and thus it will be seen that when the rack is moved either up or down by means. of the outside knob, D, the train of wheels and pinions is caused to revolve and an accelerated rotary To prevent the blind running down by the action of its own weight and to retain it in any desired position, Iuse a spring-such as L- acting againsta loose washer, M, and thus the plate on each side of the slot G is gripped between the washer and the collar ofthe knob D, sufficient friction being caused for the desired purpose.

For longer blinds'-such as those for housewindows--I alter the gearing to the arrangement shown in Fig. 3, which is simply theintroduction of an intermediate wheel and pinion upon an axle marked J and K, and the location of the rack E upon the opposite side of the pinion F. By this arrangement, as will be .readily understood, the revolutions of the roller are increased in such proportion that i f, for example, the wheels and pinions are respectively as three to onc,and the blind-roller. is one inch and a quarter in diameter, a blind of six feet length would be wound up by four inches of rack movement.

I am aware of the devices set forth in Letters Patent of the'United States, N 0. 198,682, dated December 25, 1877, No.'272,898, dated February 27, 1883, and No. 296,4 9l, dated April 8, 1884, and I do hereby disclaim the same as forming no part ofmy invention. My apparatus is distinguished from all said devices by its sliding actuating-knob D and endwise-moving rack E, and by the coact ion of its frictional device L M with the knob D and slotted housing A G, as above set forth. I

I am also aware of the device for operating the slats of Venetian blinds set forth in French Patent No. 13,082, in which an endwise-Inoving'rack is employed. Said device lacks the slotted housing, the motion-multiplying gearing, and the frictional holding device, which are essential .parts of my apparatus.

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

1. The combination, with a slotted housing,

of a protruding actuating-knob carrying 9 within the housing a short rack whichis movable endwise thereby, motion multiplying gearing which is driven by said rack when the latter is so moved, anda roller provided with a pinion which is turned by said gearing, sub

stantially as herein specified, for the purpose set forth.

2. In combination with a slotted housing, a

protruding actuating-knob carrying within 5 the housing a short rack which is movable end- Wise and having its shank provided with a frictional washer and a spring behind the same, a train of gearing, one pinion of which is in mesh with said rack, and a roller pro- 10 Vided with a pinion in mesh with the last wheel of said gearing substantially as herein specified, for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

SAM Ullh EARNSHAW ll OWELL.

\Vitnesses:

ROBT. F. DRURY, BERNARD E. DRURY.