US2645515A - Window lock - Google Patents

Description

y 14, 1953 v. c. THOMAS, SR 2,645,515

WINDOW LOCK Filed Sept. 5, 1950 Valery 6. Thom as, S!-

' IN V EN TOR.

' i F BY Patented July 14, 1953 UNITED OFFICE 1 Claim.

This invention relates to new and useful improvements and structural refinements in windows, more particularly window locks which are commonly applied to the upper rail of a lower sash and the lower rail of the upper sash of a double hung window, and the principal object of the invention is to automatically lock or secure the look when the lower sash is slid downwardly relative to the upper sash to its closed position.

The above object is achieved by the provision of coacting means in the two lock members, whereby the usual locking lever in one look memher is sustained in an unlocked position until the window sashes are closed, after which the looking lever becomes automatically released and swung to its secured position by resilient means.

Some of the advantages of the invention reside in its simplicity of construction, in its efiicient and dependable operation, and in its adaptability to economical manufacture.

With the above more important objects and features in view and such other objects and features as may become apparent as this specification proceeds, the invention consists essentially in the construction and arrangement of parts as shown in the accompanying drawings, in which:

Figure 1 is a perspective view of the invention in its locked position;

Figure 2 is a group perspective View of the two members comprising the invention;

Figure 3 is an under side plan view of one of the lock members; and

Figure 4 is a transverse sectional detail, taken substantially in the plane of the line 44 in Figure 1.

Like characters of reference are employed to designate like parts in the specification and throughout the several views.

Referring now to the accompanying drawings in detail, the invention consists of an automatic window lock which is designated generally by the reference character It] and embodies in its construction, generally, a first member l2 and a second member I4.

The first member l2 embodies in its construc tion an elongated, hollow frame It which is secured by suitable screws ill to the lower rail 20 of an upper window sash, while the second member l4 embodies in its construction a hollow,

elongated base 22 which is secured by suitable screws 24 to the upper rail 25 of the lower Window sash.

The frame l6 of the lock member I2 is provided with a conventional catch 28 while a cam-type locking lever 39 is pivotally mounted, as at 32,

on the base 22 of the second lock member l4 and is rotatable to a position wherein it lockably engages the catch 28, as shown in Figure 1. In this locked position, the lever 39 abuts a raised stop 34 provided on the base 22, and it i to be noted that a coil spring 38 is provided on the pivot 32 of the lever 36, one end of the spring bearing against the inner surface of the base 22, as indicated at 38, while the remaining end 40 of the spring is anchored on a transverse pin 42 with which the pivot 32 is equipped, so that by virtue of this arrangement, the sprin 36 normally urges the locking lever 30 to its locked position wherein it engages the catch 28.

Mounted in the base 22 on one of the vertical walls thereof is a pair of spaced bearing members 44 having downwardly extending, open ended slots 45 therein and further including integral, apertured ears 47. Mounted for swinging movement in a vertical plane in the base 22 between the bearing members &4 is a removable, arcuate latch or keeper arm 48 comprising, at an intermediate point, oppositely projecting trunnions 46 which are journaled in the slots 45 of the bearing members 44. The latch or arm 48 includes an upwardly curved end portion which is operable in a slot 50 provided therefor in the top of the base 22 and engageable beneath the lock lever 30 when the latter is in operative position.

The remaining end portion of the latch or keeper arm 48 projects outwardly through a slot 52 provided in the base 22 as indicated at 54, and is eng-ageable with a detent block 56 mounted within the hollow frame [6 of the lock member l2. The detent block 56 is provided with a recess 58 to receive the portion 54 of the keeper arm 43,

and a spring 6!! is stretched between the bearing blocks 44 in the base 22 and engages the under side of the keeper arm 48 as is best shown in Figures 3 and 4, whereby the end portion 54 of the keeper arm is urged downwardly and the other end portion of the keeper arm is urged upwardly through the recess 50. The ends of the spring 60 are connected to the apertured ears 4'! and said spring is stretched beneath the latch or keeper arm (28 in a manner to retain the trunnions 46 in the bearing slots 45.

When in operation, the lever 30 is rotated to an unlocked position and, at the same time, the lower sash 26 is slid upwardly, the spring 60 will project the keeper arm 48 through the slot 5|] so as to lockably engage a portion 62 of the looking lever 30 and thereby sustain the latter in its unlocked position against the resiliency of the spring 36.

Subsequently, when the lower sash is slid downwardly to its closed position, the portion 54 of the keeper arm 48 will become seated in the recess 58 of the detent block 56 and, as a result, the keeper arm 48 will be swung in the direction of the arrow 64 (see Figure 4), thus retracting the upper end of the keeper arm into the slot 59, that is, out of engagement with the locking lever 30, after which the spring 36 will automatically swing the locking lever to its locked position in engagement with the catch 28.

In this manner, the lock will become automatically secured by the closing of the window, and it will be apparent that this automatic securing action will take place either when the lower sash is slid downwardly while the upper sash remains stationary, or when the upper sash is slid upwardly while the lower sash is stationary, as long as there is relative sliding movement of one sash with respect to the other so as to close the window. 1

It is believed that the advantages and use of the invention will be clearly understood from the foregoing disclosure, and accordingly further description thereof at this point is deemed unnecessary.

Having described the invention, what is claimed as new is:

A sash lock comprising, a hollow base for mounting on the meeting rail of a lower sash, a spring actuated cam lock lever rotatably mounted on said base, a pair of spaced bearings in the base, said bearings havin downwardly extending, open ended slots therein, and a latch pivotally mounted in the base and engageable,

at one end, with the lock lever for releasably' sash for releasing the lock lever when the lower sash is closed.

VALERY C. THOMAS, SR.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 775,602 Hearnshaw Nov. 22, 1904 926,899 Roy July 6, 1909 1,651,048 Talbot Nov. 29, 1927 1,891,940 McAllister Dec. 27, 1932

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