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Publication numberUS7203 A
Publication typeGrant
Publication dateMar 19, 1850
Publication numberUS 7203 A, US 7203A, US-A-7203, US7203 A, US7203A
InventorsDavid R. Williams
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Of pro
US 7203 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




Specification of Letters Patent No. 7,203, dated March 19, 1850.

To all 'wh-0m t may concern.'

Be it known that I, DAVID R. VILLIAMS, of the town of Prospect, in the 'county of New Haven and State of Connecticut, have invented a new and useful Method of Opening and Closing the Movable Slats of Vin- `dow-Blinds; and I do hereby declare that the following` is a .full and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The nature of my invention consists in the applicatio-n of bevel wheels and a movable jointto the blinds ofwindows so that the slats may be opened or closed from the inside of a room without raising the window.

To enable others skilled in the art to lmake and use my invention I will proceed to describe its construction and operation.

I construct a window blind with movable slats in the ordinary way, but in order that the slats may be opened and closed from the inside of a room without raising the window, I make two bevel wheels of any proper material of suitable size and fitting one another with a shaft attached to each, substantially as represented in Figure 2. The shaft of bevel-wheel (6,) I insert through the frame of the blind either at the top as seen in Fig. 1, or at the bottom, or in the middle as may be most convenient, and connect it with the perpendicular bar by means of a movable joint as seen in Figs. l, and 2. This joint may be made in any convenient manner. This bevel-wheel should be set into the frame of the blind so as to allow of be in gear with the bevel-wheel when the blind is hung and closed. The shaft attached to the bevel-wheel (a) will pass through the window casing or frame as represented in Fig. l, and may be capped with a knob (c) of metal or other material.

Then a blind thus constructed and fitted upon the outside of a window is closed, a person inside of the room by turning the knob (e) may regulate the position of the slatsof the blinds and thus increase or diminish the quantity of light without inconvenience.

I do not claim the. construction of the bevel-wheels or the movable joint as my invention, as they have been heretofore used and are old devices, nor do I wish to`y confine myself to the precise mechanical arrangement herein specified as slight alterations may be made therein without varying the principle of my invention.

The combination of the bevel-wheels and the movable .joint essentially in the manner and for the purposes herein described.

New Haven February 12, 1850.


In presence of S. S. ELLIOTT, WM. H. ELLIOT.

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US20040206119 *Apr 15, 2003Oct 21, 2004Raytheon CompanySystem and method for vapor pressure controlled growth of infrared chalcogenide glasses
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Cooperative ClassificationE06B7/084