US84811A - Improvement in shutter and blind fastener - Google Patents

Description

UNITED STATES PATENT OEEIGE.

W. B. FARRAB, OF GREENSBOROUGH, NORTH CAROLINA.

IMPROVEMENT IN SHUTTER AND BLIND FASTENER.

Specification forming part of Letters Patent No. 84,81l, dated December 8, 1868.

To all whom it may concern:

Be it known that I, W. B. FARRAR, of Greensborough, in the county.of Guilford and State of North Carolina, have invented a new and Improved Shutter and Blind Fastening; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is an elevation of the fastening as seen from the inside of the house. Fig. 2 is a vertical section through the line :r a: of Fig. 1.

This device relates to that class of 'locks or fastenings Which are applied inside of a building to secure the bolt by which the shutterbar is confined; and consists in a lock so constructed and operating that suchbolt cannot be removed by a person outside of the building, While it can be fastened at any time from the outside Without the necessity of going Wi thin.

In the drawings, A :represents the Wall or easement of the building; B, the bolt by which the end of the bar that contines the shutters or blinds is fastened; and C, the plate attached to the inside of the Wall or easement, which supports the various parts of the lock. This bolt is formed With a nick or notch, b, around' rests against the end of a flat spring, G. The.

spring drops under the shoulder or knob, and thus holds the plate, keeping it out of the Way 'of the bolt B.

The end of the bolt projects so far inward that when the bolt is forced in its end knocks the flat spring out from under the shoulder or knob, leaving the plate E to be drawn down by the spiral spring F and fasten the bolt, as above described.

Vhen the plate E is slid up again by some person inside of the building, as the knob escapes from under the spring the latter, sprlngs down against the face of plate C with considerable force, driving the bolt partially or entirely out of the socket D, and assistingin unfastening and opening the shutter or blmd.

The slide E is guided and held in place between pins m m m m, and is provided with a notch, a, in one side, at its upper end, which drops under one of the pins m, and prevents the plate from being slid directly up again, locking the. latter in position, and conning the bolt very securely.

The plate is caused to move in such a manner as invariably to bring this notch under the pin, the spring F drawing upon one corner ofthe plate, so as to force the latter side- Wise and insure its locking.

When any person desires to unlock the device, he must take hold of a knob, k, force the plate E to the left till the notch n is free from the pin fm, and then slide the plate np till the spring G drops from the boss e and forces the .bolt out.

To lock the device, on the other hand, 1t is only necessary to force the bolt through the` socket D, so as to knock the spring G from under the shoulder e, andleave the other sprln g,

F, free to operate the plate E, as above set forth.

It is evident that, While the apparatus can be readily and securely locked from the outside, it can be unlocked only from the inside of the building.

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

l. The tumbler Fr, in combination with the W. B. FARRAR.

Witnesses A. P. ECKEL, S. H. STAPLES.

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