US232789A

US232789A - Allen m

Info

Publication number: US232789A
Authority: US
Publication date: 1880-09-28
Anticipated expiration: 1897-09-28

Description

(No Model.)

A M WALKER Shutter Fastener.

No. 232,789. Patented Sept. 28,1880.

1271 I f I I "0 vi/Zrng.

UNITED STATES ALLEN M. WALKER, OF BUTLER, GEORGIA.

SHUTTER-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 232,789, dated September 28, 1880. Application filed June 1'7, 1880. (No model.)

To all whom it may concern:

Be it known that I, ALLEN M. WALKER, a citizen of the United States, resident at Butler, in the county of Taylor and State of Georgia, have invented certain new and useful Improvements in Window-l3liud Fasteners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form apart of this specification.

This invention relates to an improved lock for window-blinds, shutters, doors, and other purposes, in which the blind, shutter, or door is secured by means of a transverse or diagonal rod or bar on the outside which is locked on the inside.

The object of my invention is to dispense with the screw-bolts and nuts or the keys or other devices usually employed for securing the bar, and to provide an automatic device by which the bolt may be secured by the simple act of inserting it from the outside, as more fully hereinafter specified, and thus obviate the trouble and inconvenience necessary in securing the bar by the ordinary fastenings. These objects I attain by the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents a perspective view of my improved lock, and Fig. 2 a vertical sectional view of the same.

The letter A indicates a supporting-plate, constructed ofmetal or other suitable material, carrying the various working parts of the device. The said plate is provided with countersunk apertures B, for the insertion of screws, by means of which it may be secured to the inside of the window-blind. The said plate is also provided withan aperture, 0, for the insertion of the bolt by means of which the bar is secured in place.

The letter D indicates two levers pivoted at the points E to the supporting-plate. The upper parts of said levers bear against each other when in a normal position, and are held in and returned to such position by means of the flat springs F, secured to the studs or screws G, and held against the respective levers by means of the pins H, secured to the supporting-plate. The lower ends of said levers diverge and extend below the lower edge of the supporting-plate, forming bearings by which the levers may be operated to release the bolt.

The contiguous faces of the lovers are formed with semicircular recesses H, which form a circular aperture when the levers are closed together, in which the reduced portion I of the bolt K sets, and by which the bolt is held when in place. The said boltis provided with a head, L, at one end, the other end being conical in shape, so as to automatically separate the levers when inserted.

The letter M indicates a transverse guide secured to the supporting-plate across the levers, in order to hold the same closely up to the face of the plate irrespective of the fulcrum-pins; and 1? indicates a stop for limiting the movement of the lower arms of the levers toward each other.

The plate is to be secured to the inside of the window-blind, with its aperture opposite the aperture in the blind through which the bolt passes.

To secure the blinds after they are closed, the conical end of the bolt is brought opposite the aperture in the blind and the bolt is forced into the aperture, forcing the levers apart until the reduced portion arrives at the circular recess formed by the levers, when the levers spring automatically together and secure the bolt without further trouble.

I am aware that a plate carrying upon itself a tube for insertion into the shutter, and also a guide to confine the motion of two springcatches, which take over the head of the bolt and prevent its withdrawal, have been used; but a key was necessary to open the springcatch for the withdrawal, and the catches were fulcrumed to the shutter below the plate, and not to the plate, as are my levers and springs. The above construction is shown in Patent No. 149,904 of April 21, 1874:, and I make no claim herein to the same.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is-- In a shutter-fastener, the combination of the supporting-plate, having an aperture for 2 eseuzse plate, constructed and operating substantially as herein set forth.

In testimony whereof I aff x my signature in presence of two witnesses.

ALLEN M. WALKER.

Witnesses:

J. T. ST WART, J AMES D. Ross.