US 2268766 A
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Description (OCR text may contain errors)
R. MONROE 2,268,766
WINDOW Loox Filed July 20, 1940 I9 I Il v Vue-mint ISQ. P/cHAep'Ma/veof Patented Jan. 6, 1942 UNITED STATES PATENT crei-#Ice W'INDOW LOCK .Richard Monroe, Houston, Tex. 'Application July 20, 1943, Serial No. v346,4?:65
I (el. 292-228) 3 Claims.
This invention relates to a window lock.
An object of the invention is to provide a lock of the character described whereby a 'lower -window sash may be locked, at any desired-elevation, against upward movement relative to the upper sash.
It is another object of the invention to provide a window lock which will automatically lockupon downward movement of the lower sash and which may be readily released from the inside -of the room only, when it is desired to elevate the lower sash.
It is a further object of the invention to provide a window lock having a guard which will prevent access to the lock from without and thus prevent the unauthorized release of the lock and elevation of the window sash.
With the above and other objects in View the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawing, wherein:
Figure 1 shows a fragmentary, front elevational view of the sashes of a window shown locked in closed position. l
Figure 2 shows an enlarged, ragmentaxysectional View taken on the line 2-2 of Figure l,
Figure 3 shows an enlarged, fragmentary, cross-sectional View taken on the line 3-3 of Figure 2.
Referring now more particularly to the draw ing wherein like numerals of reference designate the same parts in each of the figures, the numeral I designates a housing preferably formed of sheet metal and whichmay be of any selected contour. The housing is provided with a lateral flange 2 provided with openings to receive the screws 3, 3 whereby the housing may be secured to the top of the lower window sash 4 as shown in Figures 1 and 3. The housing is enclosed on all sides excepting. the side facing the upper sash 5 which latter side is open.
The open side of the housing is tted closely against the vertical metal strip 6 which is secured at its upper and lower ends by the screws 8a., 6a, to the inside of the frame of the sash 5 and which is preferably slightly countersunk into said frame as shown in Figure 3. The side margins of the strip 6 are overturned inwardly, or toward each other, forming the flanges 1, 1. The strip 6 is formed with downwardly and inwardly pitched ratchet teeth 8, as more clearly shown in Figure 2.
The bottom ofthe housing is closedy `by the top of vthe sash 4 and Vwithin it and fastened yto the top `of said sash Vby the screws 9 there is a plate |10 vwhose side margins are upwardly turned and formed with the `ears II. Fastened to these ears there is a `transverse rod I2.
Within the housing there is a plate-like dog I3 having the downwardly turned marginal flanges I4 formed, at their 'inner ends with the bearings `on Asaid rod whereby the dog is pivotally mounted. This dog is extended inwardly forming a pressure plate I6. Surrounding the rod I2 there is a coil spring I1 one end of which is retracted and clamped underneath the inner end of the plate I0 and which is thereby anchored in place. The other end of the spring is extended through an opening in the pressure plate I6 and the spring normally acts against the dog I3 to hold its free end in position to engage with the ratchet teeth 8 so as to lock the dog with said teeth and to hold the lower sash 4 against upward movement. The inner side of the housing I is formed with an inwardly swinging door or shutter Ia which may be opened for access to the pressure plate I6. The pressure upon said plate will release the dog I3 from the ratchet teeth and permit the elevation of the lower sash 4 which may be raised by means of the usual lift 4a.
It will thus be obvious that when it is desired to open, or elevate, the lower sash the dog I3 may be released and sired level and upon release of the pressure plate I6 said dog will automatically engage the corre- 1 sponding ratchet tooth 8 to prevent further elevation of the lower sash. As the lower sash isr lowered the free end of the dog I3 will ride over the teeth 8 and said sash may be lowered until it is closed and will be automatically locked in closed position.
Within the housing l there is a guard I8 of a general rectangular shape but whose side walls are slightly flared inwardly, At its outer side said side walls are outwardly turned forming the vertical flanges I9, I9 which engage behind the flanges 1, as also shown in Figure 3, thus providing a sliding connection between the guard I8 and the strip 6. The upper and lower ends of the guard I8 fit closely against the strip 6 between its side flanges 1, as shown in Figure 2. This guard is provided to prevent access to the dog I3 from without so that the dog cannot be released, and the lower sash unlocked, by the insertion of an instrument from the outside upwardly between the two sashes.
the sash elevated to the de.
The drawing and description are illustrative merely, the invention being limited only by the appended claims.
What I claim is:
1. A window lock comprising a housing adapted to be secured to a movable window sash, a dog pivotally mounted within the housing, yieldable means normally holding the free end of the dog projected from the housing into position to engage with a IXed ratchet to lock the sash against movement in one direction, said dog being mounted to allow movement of the sash in the other direction, an approximately rectangular guard in the housing and having a sliding connection with the ratchet and through which the dog Works, said guard being arranged to prevent access to the engaging end of the dog.
2. A device of the character described comprising a strip formed with ratchet teeth and whose side margins are overturned inwardly forming iianges, a housing adjacent said strip and whose side facing-the strip has an opening, a guard within the housing around the opening and having side walls whose margins adjacent said strip are outwardly turned forming flanges which engage the flanges of said strip to form a sliding connection between the guard and strip and means mounted within the housing arranged to work through the guard and opening and to engage the ratchet to lock the housing against movement in one direction and being mounted to release the ratchet to allow movement of the housing in the other direction, said guard being provided to prevent access to said engaging means.
3. A device for locking Window sashes comprising an elongated ratchet member formed with ratchet teeth and having inwardly turned marginal flanges, said ratchet members being adapted to be secured to a window sash, a housing adapted to be secured to another sash and arranged adjacent said ratchet member, the side of the housing adjacent said member being provided with an opening, a guard Within, and movable with, the housing, and arranged around the opening and having side walls whose margins adjacent said ratchet member are outwardly turned forming :flanges which engage the anges of said member to form a sliding connection between the guard and ratchet member, yieldable meansmounted withinvthe housing and having an operative end arranged to Work through the guard and opening and to engage the ratchet to lock the housing against movement in one direction and being mounted. to release the ratchet to allow movement of the housing in the other direction, the other end of said engaging means being extended forming a pressure plate, said guard being provided to prevent access to said operative end of said engaging means.