US2587695A - Window lock - Google Patents

Description

March 4, 1952 Filed July 19, 1947 s. J. clTso 2,587,695

WINDOW Loox 2 SHEETS-SHEET l S. J. CITSC WINDOW LOCK Maich 4, 1952 2 SHEETS-SHEET 2 Filed July 19, 1947 INVENTOR I STEVEN J. CITSO Patented Mar. 4, 1952 UNITED STATES PATENT OFFICE My invention is directed to self locking locks for window sash and other slidably mounted closure elements.

It is an important object of my invention to provide novel releasable window locks having spring pressed retractable latchbolts of the class described which are adapted to snap into locked position when the closure is moved into closed position and which have novel guard means actuable upon closing movement to hold and releasably lock the slidable latch bolt into locked position.

A further object of my invention is the provision of self locking locks for slidable closures which have a novel combination of parts including an angular guard adapted to be moved and 'dropped over the latch bolt to prevent its unauthorized retraction and which is actuated to closing movement by movement of the locking element of the bolt into closed position; said guard being also adapted to limit the opening movement of the slidable sash.

Other and further important objects of my invention will be apparent from the following description and appended claims.

This invention, (in one preferred form) is illustrated in the accompanying drawing bearing numerals of reference contained in the accompanying specification.

Fig. 1 is a partially cross sectional and partially elevational enlarged View of my lock illustrating its mounting on adjoining sections of two window sash frames.

Fig. 2 is an enlarged cross section of the lock illustrating the lock bolt in retracted position.

Fig. 3 is a partially side elevational and partially cross sectional view, illustrating the lower sash frame in position upraised to the limit pery mitted by the guard of my device.

Fig. 4 is a cross sectional view taken on a plane indicated by line 4-4 of Fig. 3.

Referring to the drawings reference numeral IU designates a lower slidable window sash frame whose outer edge face Illa is beveledas indicated,

6 Claims. (Cl. 292-175) of screws I'I, one of which is shown in Fig. 3. The end wall I6 has an enlarged preferably rectangular opening therein in which is slidably mounted a beveled stud I8 of slidable, retractable latch bolt I9. The upper face 2d of stud I8 is also slightly beveled toward its end as illustrated in Figs. 1 and 2. The handle I9a of latch bolt I9 is bent substantially at right angles as indicated in Figs. l and 2 and said bolt I9 carries an abutment member I9b. A compressible coil spring 2| is mounted about bolt I9 between wall I5 and stud I8 as shown in the drawing. A channel-like metal bracket 22 having oppositely extending apertured integral feet 23 is secured by screws 24 to the upper face of the upper rail of sash frame Il as shown in Fig. 4. The opposite side portions of brackets 22 are apertured at their upper ends and a pin 25 is mounted therein, said pin passing thru aligned apertures of ears 2'I of trip lock 26 and forming a pivot for said trip lock. The hinged end portion of trip lock 26 is bent angularly and terminates in an edge face 26a. The free end portion of trip lock 26 is bent at right angles to form a stop element 26h to limit either the upward movement of the lower sash or downward movement of the upper sash, or part opening movements of both sashes.

Pivoted on the intermediate portion of bracket 22 by means of pivot 28 is a vertically slotted dog 21a. whose projecting free end is reduced and beveled as shown in Figs. l, 2 and 3. The slot 29 in dog 21a is wider than the thickness of the upwardly extending portion of a bendable, yieldable retaining member 30 whose lower angularly bent end is mounted in a transverse slot in the base of bracket 22 and impinged beneath an upwardly struck intermediate element 3l which is shown integral with the bracket base in Fig. 4. The face of the upper portion of yieldable retaining member 30 is adapted to frictionally engage the edge face 26a of trip lock 26 when said lock 26 is upraised position and such frictional engagement will normally hold said lock 26 in upper position when either sash frame is in partially open position.

When either the lower sash frame is lowered or the upper sash frame moved up, the lower beveled face of stud I8 will-slidably engage the beveled edge of dog 21a to impart a slight downward movement to dog 21a, which in turn slightly bends the yieldable, retaining member 30 away from bracket 22 and away from pane I3. the upper end of trip lock 26 is heavier (and its lower edge face 26a being thereby released from L said housing;

3 the engagement of retaining member 30) the said trip lock 25 will pivot and drop to the dotted line position shown in Fig. 1 so that the stop element 2Gb overlies the handle I9a of latch bolt I9 to prevent its being forced into open position by unauthorized manipulation.

When a person on the inside of the house desires to bring either of the sash frames towards each other (namely open either thereof) he will manually vlift theitrip lock 26 into upper position and retract bolt I9 from locking engagement and either pull the lower sash frame upwardly or the upper sash frame downwardly until the face 20 of stud I8 strikes the stop element` 26h of trip lock 2B to thereby stop any further opening movement of either sash frame..

An important novel advantage of myconstruction and its operation is that no separate manual movement is necessary to place the trip lock-2S into locking position as .this is automatically accomplished .in r`-the described manner vupon the .sliding of. either.or both sash frames into Aclosed position.

When .the user `desires to fully open either sash frame or both thereof beyond the limit. normally .permitted by stop element 2Gb the latch bolt I9 is T.withdrawn against the action of its spring and :the'stud I8 of bolt I9 willpass by oravoid enf gaging .the .stop element 26h as either sash frame is moved to-a more than normal open position.

`As many changes could be made in the above construction, and many Vapparently widely different-embodiments of my invention, within the yscope-of the claims, .constructed without dep-arti ing from the-spirit or scope thereof, it is intended that all matter contained in the accompanying specication shall .be interpreted as illustrative and not in a limiting sense.

1 claim:

1. In a self-locking latch for windows, a bracket secured .to .an upper sash frame; an angularly bent trip lock` pivoted on said bracket;

.an aperturedhousing secured on the lowersash frame; a spring pressed latch bolt slidably lmounted in said housing and having a studat .one end of said latch bolt; a slotted dog pivoted on said bracket; -a bendable retaining member extending through said slotted dog, said retaining member in unbent position normally .engaging `an end of said trip lock whenthe window .is open toA thereby hold said trip lock in unlocked 4Vposition, thefclosuie of the window being ladapted to cause `engagement of said stud and said dog to cause said dog to pivot `to thereby bend said retaining member to cause disengagement thereof Afrom the endof .said trip .lock to thereby cause gravity pivoting of said trip lock into locking position. Y y

2...In a vsafe-locking latch for windows, a bracketsecured Vtoan upper .sash frame; an angularly lbent trip lock pivoted on said bracket; a housing secured on a lower sash frame; a spring pressed latch bolt slidably mounted in a slotted dog `pivoted `on said bracket; -a retaining member adjacent said bracket and extending upwardly through the slot r`of. said dog, said retaining member being adapted to engage said trip lock .to hold said trip lock in unlocked position, the engagement of said latch bolt and said dog during closure of the sash frames being adapted to cause movement .of said .retaining member from engagement with s aidtrip lock to thereby permit said trip lock .to pivot. to .locked position.

3. In a safe-locking latch for windows, a bracket mountable on an outer sash frame; a trip lock pivoted on said bracket; an apertured housing secured on an inner sash frame; a spring pressed latch bolt slidably mounted in said housing; a beveled stud on one end of said bolt; a slotted dog pivoted on said bracket; an upwardly extending retaining member extending through the slot of said dog and at selected positions of the sash viframes engaging an end-of said trip lock, at other positions of said sash frames said stud engaging said dog to cause downward moverment of said dog to cause it to pivot to thereby cause movement of said retaining member from engagement with said trip lock to thereby permit '.gravityzpivoting of said trip lock to locked position.

4.*In a safety lock for window sash frames having an apertured housing on one of said sash frames; a slidable retractable bolt mounted in said housing andhaving a stud at .one end; a springfor normally pressing said bolt into locking position; a bracket mountable on the other ofsaid `sash frames; Aa trip lock pivoted on.said bracket and adapted when lowered to prevent `retraction of said bolt; a slotted dog pivoted to .dog land said stud .to permit said studto move outwardly to be .retained .from further opening movement .bysaid .dog .until manual retraction of said bolt.

5, In a safety lock for window sash frames having va lpassaged housing and a retractable latch bolt slidable therein 'for one of saidsash frames; a spring for movingsaid bolt into locking position; a bracketon the second sash frame; a trip lock pivoted onsaid bracket; v.a dog pivoted on. said bracketand adapted toretain said latch bolt to lock said sash frames from movement; a retaining member engageable by said dog :and normally holdingsaid trip lock'in open position; said bolt at selected ypositions Acoming into engagement with said dog to pivot same to cause disengagement of said retaining member and said trip lock to permit said trip lock 'to drop into latch bolt lockingpositions and prevent retraction of .said latch'bolt vfrom unauthorized positions.

6. In a device for locking .a slidable'latch`-bolt against retraction; a bracket adapted to be secured on a slidable closure; a lock pivoted on said bracket and when lowered being adapted to lock abolt against retraction; a retaining member normally applying pressure against said lock to retain it in open position; a'dog pivoted on said No referencescited.

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