US532805A - Blind-fastener - Google Patents

Description

(No modei.

J. MCCARTHY.

BLIND FASTENBR.

No. 532,805. Patented Jan. 22, 1895.

I/VHMQ so c a 8444.1 ewtoz l\\ I OWWBQaWNQ) 6M5, 5. ail: V101, I v fiiw i alaw JAMES MCCARTHY, OF NORWICH, CONNECTICUT.

: BLI ND-FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 532,805, dated January 22, 1895.

Application filed April l9 1894. Serial No. 508,116. (No model.)

To all whom it may concern:

Be it known that I, JAMES MCCARTHY, a citizen of the United States, residing at Norwich, county of New London, State of Connecticut, have made certain new and useful Improvements in Blind-Fasteners, which improvements are fully set forth and described in the following specification, reference being had to the accompanying sheet of drawings.

This invention is in a well known class of blind fasteners now in common use, consisting of a spring pressed lever pivotally hung in the blind, each end of which lever is formed as a hook, one of said ,hooks coacting with a staple driven or screwed into the window sill to retain the blind in its closed position and the other end of said lever likewise coacting with a staple or screw-eye secured to the'wall of a building to retain the blind in its open position.

While fasteners of this class serve satisfactorily to lock the blind open or closed they (as now constructed) do not prevent the interlocking parts from vibrating and rattling when moved by the wind.

The object of this invention is to overcome the objectionable feature described above by so constructing a fastener that when a blind is locked thereby in its open position no vibrating movement of the same will be possi-' deemed unnecessary for the reason that its construction is identical with the form now in common use and is well known.

To assist in explaining my invention I have provided the accompanying drawings, i which- Figure 1 illustrates in elevation my improved blind-fastener as the same appears when in use. Fig. 2 is a View partly in section showing the preferred means provided in connection with the screw-eye for preventing vibration of the blind. Fig. 3 embraces side and edge views of a screw-eye fitted up with a modification of my invention.

Referring to the drawings the letter a indicates the usual lever-hook provided in this class of blind fasteners and b the screw-eye secured to the side of the building in connection with which hook-lever 01. operates when serving to hold the blind open. Screw-eye b is provided with a cylindrical portion 0 located at one side of the eye proper, which is bored to provide a chamber 01 to receive a bolt 6. In chamber d is placed a spiral spring f one end of which abuts the bottom of the chamber and the opposite end the inner end of the bolt e, which spring by reason of its expansive tendency seeks ever to force bolt eout of its chamber but is prevented from so doing by reason of a pin g extending across chamberd at right angles to bolt e,a depression e being provided throughout a portion of the bolt 6 to receive said pin, as shown in Fig. 2.

With a screw-eye of the above described construction properly secured to the side of a house it will be seen that in the operation of looking a blind in its open position, said blind as it approaches the screw-eye will first come in contact with bolt e which latter will be pushed before it into the chamber d against the force of its spring f until the hook-lever a snaps into the screw-eye in the usual manner. The spring 6 then serves to crowd the leverhook tightly against the inner wall of the screw-eye thus taking up all play or undue movement of the locking parts and making it impossible for them to rattle.

Fig. 3 illustrates a modification of my invention such modification consisting in providing the ordinary screw-eye with a metallic spring 71. extending from the head I) of such screw eye to a point somewhat beyond the outer end of the same, said spring being secured to the screw-eye in any suitable manner. Spring It serves to engage the blind with a tendency to force the same outward when closed, in the same manner as the bolt already described, thereby taking up the play between the screw-eye and the hook.

My invention may be very cheaply produced, is very simple in its construction and accomplishes effectually the object for which it was intended.

Having described my invention, I claim- 1. As an article of manufacture, a screweye having combined therewith a spring actuated buffer, the outer end of the bufier extending beyond the end of the eye, whereby ICO eye having ahollow cylindrical portion at one side thereof, a spring-actuated recessed bolt or buffer within said hollow portion, the outer end of which projects beyond the outer end of the eye, and a pin extending through the cylindrical portion of the eye and Within the recessed portion of the bolt, substantially as set forth.

JAMES MCCARTHY.

Witnesses:

FRANK H. ALLEN, LILA D. PEALE.

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