US1998124A - Window lock - Google Patents

Description

Patented Apr. 16, 1935 UNITED STATES PATENT OFFICE 5 Claims.

This invention relates to improvements in win dow locks.

The general object of the invention is to provide a simple structure'by means of which the relatively slidable sections of a window may be locked with respect to each other.

A further object of the invention is to provide a simple locking arrangement for looking a window either substantially closed or in any one of a number of desired partially open positions.

A further object of the invention is to provide a locking device which will bind the window sections together so as to prevent rattling thereof.

A further object of this invention is to provide a locking structure in which the locking device itself may be moved to inoperative position and out of contact with the keeper strip to entirely free the window sections from any latching action.

A still further object of the invention is to provide in combination with a locking strip, a locking device having means for preventing unintentional complete disengagement thereof.

These and many other objects, as will appear from the following disclosure, are secured by means of the structure of this invention.

This invention resides substantially in the combination, construction, arrangement and relative location of parts, all as will be set forth in full detail in the following description.

In the drawing, 7

Fig. 1 is a perspective view of a portion of a window and its casement, showing the locking device of this invention applied thereto;

Fig. 2 is a side elevational view of the locking" device itself;

Fig. 3 is a bottom plan view thereof;

Fig. 4 is a top plan View thereof;

Fig. 5 is a front elevational view of a portion of the cooperating strip;

Fig. 6 is a top plan view of the strip showing the latch member in engagement therewith;

Fig. 7 is a cross sectional viewt'aken on the line 7-4 of Fig. 6 and Fig. 8 is a vertical central cross sectional view through the operating button for the locking device, showing the catch for holding it when desired in operated position.

The nature and functions of the device of this invention will best be understood by detailed reference to the drawing.

Fig. 1 shows the structure as applied to an ordinary wooden casement window, comprising a pair of relatively slidable sections 2 and 3 mounted in a suitable frame I. At 5 is indicated the locking device itself which is attached to the upper edge of the lower section, and the cooperating locking bar 4, which isattached along the vertical side member of the upper window section.

The locking device itself, as shown inthe figures comprises a substantially rectangular shaped casing 6, having side flanges 1, by means of which it may be secured at the point of use. One end of the casing is cut away, as indicated at 8, and through the opening thus formed the latch arm 9 projects. This arm is pivotally mounted on a pivot pin l0, which passes transversely through the casing. At I I is an operating button which passes through an opening in the top of the casing, andis provided with an enlarged inner and I6 which engages with that part of the arm 9 which extends beyond the pivot pin and lies under the operating button head it. An opening is cut in the latch arm 9 adjacent this head so as to permit free relative movement therebetween without binding of the parts. At i2 is a coil spring encircling pivot pin in, and having its end l3 resting against the rear of the arm 9, and having its other end i 4 anchored in the casing 5 thereby to hold the parts in the position shown in full lines (Fig. 2).

. It will be apparent that when the button II is depressed the left hand end of.arm 9, Fig. 2, will rise to the dotted position shown, and the other end will descend against the resistance of spring i2. The arm may be locked in this position by reason of the engagement of a small spring finger H with the shoulder 2| and the button H, as is clear from Fig. 8. This finger may be formed in any suitable manner, as for instance by being struck up from the material of the casing 6. The free end of latch arm 9 is provided with cut out portion Hi, to form a curved finger I9 which is normally disposed out of the plane of the adjacent parts and the arm 9, as is clear from Fig. 2. Mounted at the under edge of the arm 9, adjacent the finger I9, is the projection 20.

The cooperating keeper strip which is indicated generally at B, is preferably made of a metal bar 22 which has a flange 23 formed along one edge thereof, by bending the material of the strip, as is clear for example from Fig. 6. Distributed along the strip are a plurality of struck-up ears or sockets 24 positioned to engage the projection 20 on the latch arm 9. Preferably the inner walls of the ears or sockets lie in a plane which is at a slight angle to the plane of the strip for cooperation with the similarly inclined cooperating side wall of the projection 28). Thus when the parts 20 and 24 (Fig. '7) are forced firmly together the tendency is for them to be drawn towards each other, with the result that when attached to window sectionsthey bind the sections together to prevent rattling.

As is clear from Fig. 6, the normal position of the parts is such that the flange 23 lies in the opening l8 and the finger l9 lies along the rear face of the flange. The purpose of this arrangement is to permit of sufficient movement of the latch arm 9 when the button H is depressed so that the projection 20 may be released from the sockets 24, but the latch arm 9 cannot be raised sufficiently far so that the catch I! (Fig. 8) will engage the button 2| and hold the parts out of engagement. To understand this more clearly, in order to operate the device the window section 3 is moved relatively upwardly to bring the latch arm half-way between the two projections 24 sufiiciently so that the adjacent socket is out of engagement with the projection 20. Button I I is then depressed so that the latch arm and its projection 20 are moved out of the path of movement of the sockets, but are limited against any additional movement by reason of the engagement of finger 19 with the flange 23. There is sufficient space indicated in Fig. 6 between the adjacent faces of flange 23 and finger I9 to allow latch arm 9 to thus swing upwardly moving projection 20 out of the path of sockets 24. The window section 3 may be moved downwardly so as to open the window the desired amount. Button H is then released and spring I2 moves latch arm 9 back to a position where the projection 23 will engage the nearest socket 24. In order to completely disengage the parts a similar operation is employed, but in this case the window section 3 is moved to full open position, or far enough so that the top end of the keeper strip 4 is completely out of alignment with the latch arm. Further depression of button H will then cause the rising of latch arm 9 completely out of the path of the strip 4 and its projections 24 and the parts will be locked in this position until released by reason of the catch I! engaging the button 2! (Fig. 8). Either window section may then be moved up and down without any danger of engagement of the parts.

In addition to this function for the finger IS, the interlocking relation of the parts 18 and 19 (Fig. 6) also acts to prevent lateral movement between the window parts as does the engagement of the projection 20 with the sockets 24. Furthermore, when the projection 20 gets in cup or socket 2 4, and then the window section 3 is forced down firmly, the window sections will be drawn tightly together by reason of the inclined engaging walls of the members 24 and 20, eliminating rattling.

From the above description it will be apparent that this invention resides in certain principles of construction to produce functions which may be accomplished by those skilled in the art, without departure from the scope of this invention. I do not, therefore, desire to be strictly limited to the disclosure as given for purposes of illustration, but rather to the scope of the appended claims.

What I seek to secure by United States Letters Patent is-- l. A latch for two relatively movable window sash, one of which has a keeper strip with spaced projections and a flange along one edge, comprising a housing member adapted to be secured to the top edge of one sash having a pivotally mounted lever adapted to move in a vertical plane positioned therein, one end of said lever being adapted to engage any one of the projections of the keeper strip and having a portion at one side adapted to coact with the flange on the keeper strip, and a button on said housing adapted to depress the other end of said lever to carry the other end out of engagement with a projection on the keeper strip when the sash are moved relatively to each other to disengage the lever from the keeper strip projection.

2. A latch for two relatively movable window sash, one of which has a keeper strip with spaced projections and a flange along one edge, comprising a housing member adapted to be secured to the top edge of one sash having a pivotally mounted lever adapted to move in a vertical plane positioned therein, the end of said lever being adapted to engage any one of the projections of the keeper strip and having a portion at one side adapted to coact with the flange on the keeper strip, and a button on said housing adapted to depress said lever to carry the opposite end out of engagement with the projection on the keeper strip when the sash are moved relatively to each other in a direction to disengage the lever and keeper strip projection, the part on said lever normally engaging the flange being slightly spaced therefrom in normal position and adapted normally to prevent complete separation of the lever from the keeper strip.

3. A latch for two relatively movable window sash, one of which has a keeper with spaced projections and a flange along one edge, comprising a housing adapted to be secured to the upper edge of one of the sash, a pivotally mounted lever in said housing adapted to swing in a substantially vertical plane, a button engaging one end of said lever adapted to raise the opposite end when the button is depressed, a spring associated with the lever for normally keeping one end of the lever down and the other up, the outer end of said lever being provided with two projections one of which coacts with any one projection on the keeper strip and the other of which interlocks with the flange on the keeper strip.

4. A latch for two relatively movable window sash, one of which has a keeper with spaced projections and a flange along one edge comprising a housing adapted to be secured to the upper edge of one of the sash, a pivotally mounted lever in said housing, spring means associated with the pivot of said lever adapted to hold the outer end of said lever down and the inner up, a button engaging the inner end adapted to raise the outer end when the button is depressed, said outer end having two parts, one of which is adapted to engage any one projection on the keeper strip and the other the flange on the keeper strip.

5. A latch for two relatively movable window sash, one of which has a keeper with spaced projections and a flange along one edge comprising a housing adapted to be secured to the upper edge of one of the sash, a pivotally mounted lever in said housing, spring means associated with the pivot of said lever adapted to hold the outer end of said lever down and the inner up, a button engaging the inner end adapted to raise the outer end when the button is depressed, said outer end having two parts, one of which is adapted to engage any one projection on the keeper strip and the other the flange on the keeper strip, and means associated with said button for permanently locking the same in depressed position.

LOUIS EISENMAN.

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