US2574961A - Sash lock - Google Patents

Description

NOV. 13, 1951 A, COUTURE 2,574,961

I SASH LOCK Filed July 26, 1946 IN VEN TOR. [445597 P Co urues Patented Nov. 13, i951 UNITED STATES PATENT OFFICE Application July 26, 1946, Serial No. 686,312

1 Claim. 1

This invention relates to window sash locks the object being to provide a device mountable upon the upper cross rail of the lower sash of a pair of sashes and when in locked position prevents relative movement of either the upper or the lower sash relative to the other, means being provided to manually release the locking element from the interior of the room.

These and other features and objects of the invention are hereinafter more fully described and claimed and a window lock embodying my invention is shown in the accompanying drawing in which- Fig. 1 is a side elevation of my improved sash lock in locked relationship with the upper sash.

Fig. 2 is a sectional view of my improved lock member in unlocked relationship with the upper sash.

Fig. 3 is a perspective view of my improved window sash lock.

Fig. 4 is a plan view thereof.

The lock embodying my invention comprises a base member I preferably formed of sheet metal and having upwardly extending side flanges 2 and 3 and a downwardly extending flange 4 on the inner face of the inner sash rail. The flange has an aperture 5 to receive a screw 6 which extends into the inner face of the lower sash as shown in Figs. 1 and 3. An additional screw 1 extends through the aperture 8 in the side flange 9 on the top edge of the upper rail of the lower sash. Base member I has a downturned flange l0 as shown in Figs. 1 and 3 which bears against the outer face of said inner sash rail.

The lock element in its preferred form comprises a flat strip of sheet metal or snubber lever II which, at its inner end, is slotted as shown at 12 providing two end members I3 and I4 inturned to provide a sleeve for pivotal mounting upon the pin I5 secured at its opposite ends in the respective side flanges 2 and 3. The forward end 16 of the snubber lever II is upturned at an obtuse angle with respect thereto. On the said upturned end It is positioned a rubber snubber l'l. When the rubber tipped snubber lever II is in the position shown in Fig. 1 the snubber "engages the inner face of the side rail of the upper sash and is held in contact therewith by means of a spring l8. The latter is mounted upon pin I5 with one end l8 bearing against the top surface of lever II and with its other end bearing against plate I, normally urging snubber l'l into frictional contact with the side rail of said upper sash.

In view of the angular disposition of the end it of lever H; as shown in Fig. 1, movement of either sash relative to the other increases the pressure contact of the rubber with the upper sash and thus prevents relative movement of the sash members by a person attempting to enter a building from the exterior thereof.

The latch may be released from the interior of a room by means of a plate [9 which is pivotally mounted upon and turnable on a transverse pin 20 extending between flanges 2 and 3 and spaced from pin 15. Said plate l9 has a terminal end portion 2| which projects laterally beyond flange 3 and is engageable by the finger of an operator within the room for pivoting said plate l9 to the position shown in Fig. 2 to turn the lever II upwardly and thereby remove the snubber element from contact with the side rail of the upper ,sash. Either sash may then be moved relative to the other.

' It is further pointed out that my improved lock has no portion thereof extending outwardly of the window sash to such degree that a curtain, shade or Venetian blind would catch on it.

It is believed obvious from the foregoing that my improved window lock is comparatively simple and inexpensive in construction and, when the parts are in the position shown in Fig. 1, movement of either sash relative to the other is prevented thereby preventing an intruder from opening the window from the exterior of a building.

Having thus briefly described my invention, its utility and mode of operation, what I claim and desire to secure by Letters Patent of the United States is A window sash lock for preventing relative sliding opening movement of the inner and outer sashes comprising a plate mounted, and secured upon the transverse rail of the inner sash, a substantially horizontal snubber lever pivotally mounted at one end upon said plate with its other end arranged at an obtuse angle to said lever for frictional engagement with the side rail of the outer sash, spring means on said plate normally urging the end of said snubber lever into pressure contact with said side rail, and a snubber releasing plate pivotally mounted upon said first plate in spaced relation to the pivotal mounting of said snubber lever, with a portion of said releasing plate positioned below said lever whereby upon manual upward pivotal movement thereof said releasing plate operatively engages the under surface of said snubber lever for pivoting the same out of contact with said side rail, said releasing plate being so constructed as to be positionable at right angles to said lever when said lever is lifted to maintain the same in inoperative position against the action of said spring means, said first plate having a pair of upstanding flanges at its opposite longitudinal edges, said snubber lever being positioned between said flanges and pivotally joinedthereto, said releasing plate being positioned between said flanges and pivotally joined thereto and having a handle extending laterally therefrom.

ALBERT iidfJTURE.

REFERENCES CITED Number UNITED STATES PATENTS Name Date Lairamore July 8, 1890 Pruell Dec. 19, 1922 Morse July 24, 1923 Segalini Sept. 21, 1926 Backman Oct. 19, 1926 Pekar Mar. 6, 1928 The following references are of record in file of this patent:

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