US2679416A - Self-locking window lock - Google Patents

Description

y 5, 1954 E. TASSELL 2,679,416

SELF-LOCKING WINDOW Locx' Filed Sept. 25, 1950 LEsuE E. TAsssu.

A-r-ronnzvs Patented May 25, 1954 UNITED STATES PATENT OFFICE 2,679,416 SELF-LOCKING WINDOW LOCK Leslie E. Tassel], Grand Rapids, Mich. Application September 25, 1950, Serial N 0. 186,628 3 Claims. (Cl. 292 242) l 2 This invention relates to an automatic, self- On the upper side of the upper rail 6 of the locking window lock which is used with windows lower sash the lock is mounted. It includes a having sliding sashes, and in which, when the sheet metal base 1 having a top and downwardly sashes are moved to closed position, the lock will extending sides and ends. Over the top of the automatically move into operative locking posibase 1, the movable locking member to engage tion and not require manual turning of the lockwith the keeper which has been described is ing member to engage with a keeper therefor, pivotally mounted to turn about a vertical axis. but will self engage therewith, providing assur- It is made from sheet metal having a flat genance that when the window is closed the sashes erally circular base 8, from which a curved verwill be locked together, 10 tical side or wall 9 extends upwardly around It is an object and purpose of the present inapproximately one-half of the circumference of vention to provide such automatic or self-lockthe base 8. At one end and away from the keeper ing window lock in a very practical and simple such side 9 is extended outwardly in a handle l0 structure, which is sure and simple in its operaf r m nual engagement. At the other end the tion and which may be installed on the sashes side or wall 9 is formed nto a terminal lip H and in th same manner a non-automatic l ok located so that when for example, the lower sash which, after a window i clos d, a t b manuhas been lifted and is being moved down to closed ally moved to lockin position t ins th t th position such edge will ride against a cooperating sashes are securely locked and held against edge of the edge 4 5) o er by swing the movement. locking member in a counter-clockwise direction An understanding of the invention may be had about its pivotal mount on the base I (which will from the following description, taken in conherea ter be described), moving lip H back of nection with the accompanying drawing, in h d of the ledge 4 So h i m y b r which, ceived and moved underneath to engage with the Fig, 1 i a plan vie of t 1 k and keeper keeper and lock the two sashes against vertical of my invention Shown together in locked 130 iseparating movement of either of such sashes. tion. The base 8 is cut away opposite handle 10, as

Fig. 2: is a horizontal sectioh through the base shown n e- 1, f r a distance mak n a r ss, of the lock, substantially on the plane of line so s that th as w n p p y lo ated with ref- 2-2 of Fig, 3, looking downwardly, erence to the lip H may move upwardly relative Fig. 3 is a side elevation of the lock shown in t0 the keeper, the proj c p 5 and p O Fig. 1, the sash rails to which the lock and keeper the ledge 4 passing ugh Such recess. The

are secured being in vertical section. ledge 4 is at One end portion of t e re e s or Fig. 4 is a rear elevation vertical section at pa Ou f om he b s 8- A h o r e d 1 0 right angles to the section hown in Fi 3, tak n tion of the said recess a short wall I 3 of arc shape substantially on the plane of line l 4 f Fi 3, form, similar to but shorter than the wall 9, exlooking in the direction indicated, and tends upwardly having its upp r edge of a curved Fig. 5 is a rear elevation of the lock and keeper am form as shown a I th ed I 4 and the cam the same as in Fig. 4, but with the lock and edge I 2 of the two wall sections 9 and It being keeper separated, the two being shown in locked Substantially Parallelposition in Fig. 4. The base 8 has a centrally located headed pivot Like reference characters refer to like parts in IE extending therethrough which is of out-ofthe different figures of the drawing. round form where it passes through the base.

On the lower rail 1 of the upper sash of a Such pivot pin extends downwardly into the base vertically sliding window, the lock keeper is per- 1 and carries, at its lower end, a head 16 which manently secured. It includes a sheet metal base has two opposed flat sides. A leaf spring having 2 from the upper side of which a keeper hook exa middle section I l bears one against each of the tends, having a generally vertical portion 3 at fiat sides [6 (Fig. 2), while the end portions I 8 the upper end of which a ledge 4 is bent substanof such leaf springs are of curved form to corretially at right angles and which terminates in a spond to the rounded end portions of the downwardly extending lip 5. The ledge t is inhousing 7.

clined at a slightly acute angle to the horizontal The leaf springs when free to operate hold the plane of the upper side of the sash rail l on which head It in central position, as in Fig. 2, with the the keeper is mounted. movable lock member in its central, normally locking position as in Fig. 1, and as shown in dashed lines in Fig. 2. When the lock is manually operated by swinging the handle I!) to the left to release it from the keeper, both of the springs I! are stressed so that upon release of the handle 10 the locking member returns to its initial position. On manually turning the locking member or lever to release from the keeper the sashes may be moved either by lifting the lower sash, this being most commonly done, or lowering the upper sash, or both sashes may be vertically moved, the lower sash upwardly and the upper sash downwardly.

If the upper sash has been lowered, or if the lower sash has been raised, on moving them to bring the sash rails i and 6 together, as in Fig. 3, the lock is turned counterclockwise from the position shown in Fig. l by the engagement of an end edge of the ledge 1 against the cam edge 12 of the wall 9, thereby turning stressing the springs ll until the point or nose of the lip H passes to a position underneath the ledge 4. The springs thereupon automatically swing the lever in the opposite or clockwise direction and the lip ll passes underneath the ledge 4 so that the two sash members I and 8 are automatically locked against separation. It will be noted that the upper edge of the wall a rides against the lower side of the ledge 4.

After the lock described, the projecting handle l0 may be manually engaged to turn the movable locking member still further in a clockwise direction. But irrespective of whether the lock is as tightly locked as may be desired through the selfdocking or automatic action described, and whether or not subsequently the locking member is manually operated to make a tighter connection of the movable member with the keeper, the lock is automatic in its operation and the keeper engagement is amply sufficient to insure that the sashes are locked together and cannot separate by a vertical movement of one relative to another until the locking member is moved to released position.

If on turning the pivotally mounted locking member counter-clockwise from the position shown in Fig. 1 to the dash line position of the handle it at the right sufficiently that the intermediate stressed portions of the spring I! bear upon the rounded end portions of the head I6, so that the head will not return under the pressure of the springs to its initial position shown in Fig. 2, such extreme of movement will bring the cam edge M of the wall section l3 underneath the opposite edge portion of the ledge Thereupon on separating the sashes, upon relative vertical movement of one with respect to the other, the curved or cam edge !4 will ride against such opposite edge A and turn the locking member so that springs l'i will operate to complete the turning of the pivotally mounted locking member to central position as shown, in which position the lip l l and its cam edge 12 will be located so as to engage with the first mentioned edge of the ledge 4.

The window sash lock shown and described is of a very practical, novel and useful structure. It is economically produced and insures the complete locking of vertical sliding window sashes so that the two adjacent rails, the lower rail of the upper sash, and the upper rail of the lower sash shall the head It and has automatically operated as wardly extending be locked together, irrespective of whether or not the one closing the window thereafter manually moves the movable lock member to a tighter looking position.

The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

I claim:

1. In a structure as described having, a keeper adapted to be permanently secured at the upper side of a horizontal rail of a vertically sliding window sash, a locking member mounted to turn about a vertical axis adapted to be permanently secured to a horizontal rail of a second window sash, said two sashes being vertically slidable past each other, and said keeper having a hook portion extending a distance above the sash on which it is adapted to be secured, said locking member including a base of generally circular form and an upwardly extending member in tegral with the base at an edge thereof, the improvement comprising said member having at one end a terminating lip having an under cam edge above the base, said lip being adapted to pass underneath the hook portion of the keeper for locking the sashes together, yielding means associated with said locking member for normally holding it in the position it occupies when operatively connected with the keeper, said means yielding when, upon relative vertical movements of the sashes, the rails on which the keeper and locking member are adapted to be secured are brought into close proximity and the keeper and locking member have moving contact engagement, said cam edge riding against one side of the hook until it passes thereby, and thereafter being turned by the force of said yielding means into locking engagement with the keeper hook.

2. In a window latch including, a keeper, a movable locking member adapted to turn about a vertical axis, a base on which said locking member is mounted for turning movement, said locking member comprising a generally circular plate immediately over said base and an upvertical wall partly around said plate, one end of said wall terminating in a lip, the improvement comprising said lip at its underside being curved upwardly and outwardly from the lower edge of the wall to the free end of said lip, and yielding spring means operetively connected with said locking member for normally holding it in a predetermined position, which is substantially the position which the locking member is to have when in looking engagement with the keeper.

3. A structure as defined in claim 2, and a second vertical wall or short length extending upward from said plate spaced a distance from said lip, said second upwardly extending wall having an upper edge of curved form extending downwardly from the upper end thereof toward said lip, said curved edge of said second upwardly ex tending wall and the lower curved edge of said lip being in generally parallel relation to and spaced from each other.

References Cited in the file Of this patent UNITED STATES PATENTS

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