US994556A - Safety window-lock. - Google Patents

Description

Patented June 6,1911.

E. V. AMATO.

SAFETY WINDOW LOCK.

APPLICATION rum) M11. as, 910.

I N L HM ATTOR/VE Y 8 UNITED STATES PAT NT oFFIoE.

EDWARD V. AMATO, OF NEW YORK,.1\T. Y.

sArE'rY' WINDOW-LOCK.

Specification of LettersPaten-t.

Patented June 6,- 1911.

Applicationfil ed- January 26, 1910; Serial No;- 540 124.

- ventilation.

My device is simple and may be cheaply constructed and easily operated.

More particularly stated, I provide a plate located upon one sash and carrying a number of pawls, each forming a practically closed loop, and I further provide a locking member having the form of a casing and adapted to be located upon the other sash, and also having means for engaging any one of the pawls; I also provide means for holding the pawl in positive engagement with the casing.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a perspective showing a window having sashes provided with my improved sash fastener; Fig. 2 is a fragmentary elevation showing the device as used upon a window, the sashes of which, however, are in different positions from those of Fig. 1; Fig. 3 is a detail section on the line 33 of Fig. 4, looking in the direction of the arrow, and showing one of my improved pawls and the lock associated therewith; Fig. 4 is a section on the line 4-4 of Fig. 2, looking in the direction of the arrow,

' and showing details of'the lock; and Fig. 5

is a perspective of the lock forming a part of the fastener.

At 6 is a window which is provided with movable upper and lower sashes 7 and 8.

A plate 9 is secured rigidly upon theupper sash 7 by aid of screws 10, or equivalent fastenings. A number of bearings 11 are mounted upon the plate 9, these bearings being made of sheet metal bent upon itself and provided with wings 12 which extend through the plate 9 and project in opposite directions. Each bearing 11 supports a pawl 13' which is rh'adejof resilient heavy wire bent mto' a substantially closed loop of a generally triangular form, as will be understood from Fig. 3;

At 14 is the lock casing having generally the form of a box, a portion of the outer periphery of the same beingjrounded, as indicated by dotted lines in Fig. 4 and by full" lines in Fig. 5, the curvature of the portion ofthe box ust referred to correspondmg to the path of travel of the outermost portions of the pawls 13'; That is to say, as each pawl IS tIHIIGd within its bearing 11,

the outermost portion of the pawl describes a path which 1s inside of the curved outer portion ofthe casing 14'.

The casing 14 is provided with a top portion 15 rigid relatively to it and connected withthis rigid top portion by aid of ajhin'ge 1-8isla lid 16. This lid is provided with an opening 17 and may be swung up or down,

as desired. A screw 14 provided with a head 14 is used for securing the lid of the casing in fixed position whenever desired. When the screw is in position, as indicated in Fig. 3, the head 14 engages the lid 16 directly, the shank of the screw extending downwardly through the bottom of the casing and into the lower sash 8.

The operation of my device is as follows: The pawl 13 may be folded back against the plate 9 and when in this position either or both of the sashes may be moved freely. Any one of the pawls, however, may be swung outwardly so as to cross the top of the lower sash. This is the case in Fig. 1, with the lowermost of the pawls. The lid 16 being raised, the upper and lower sashes may be adjusted relatively to each other so that the bottom portion of a pawl may be swung into the casing 14. The lid 16 is now closed, the resiliency of the pawl being sufficient to allow for this. The pawl now extends through the opening 17, as indicated in Fig. 4. This beingv done, the sashes can not move toward or from each other and rattling is thus effectively prevented. This, of course, is assuming that the pawls fit neatly into the opening 17 and that when the parts are in the position indicated in Fig. 4 there can be but little lost motion between the casing 14, the lid 16 and the pawl 13 which is in engagement with these members. r

It may sometimes be desirable to raise th lower sash or to lower the upper sash, or to both raise the lower sash and lower the upper sash from the normal positions occupied by these sashes. This may be done and the pawls adjusted accordingly, so as to hold the sashes in the positions indicated. When the sashes are in their normal positions, as indicated in Fig. 1, the lowermost pawl 13 extends through the casing 14, as in dicated in Fig. 4. The operator, by raising the lid 16 from the inside, can readily release the sashes from each other, but a person from outside of the room being unable to raise the lid 16 can not readily disengage the sashes.

It is in some instances desirable to fasten the lid 16 down securely upon the top of the casing, and for this purpose the screw 14?, above described, is employed. The upper sash being forced into its uppermost position and the lower sash into its lowermost position, the lowermost pawl 13 is swung into the positon indicated in Fig. 3, the lid 16 being lowered; and next the screw 14c is inserted. This being done, a person outside of the window can not readily insert his hand so as to move the pawl 13 and disconnect the two sashes.

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

In a window lock, the combination of a .pawl made of a piece of resilient wire bent upon itself so as to assume a substantially triangular form, means for mounting sald pawl upon a sash, a casing mounted upon EDl/VARD V. AMATO.

Witnesses:

WALTON HARRISON, PHILIP D. RoLLHAUs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. I

Images