US3394955A - Check rail lock - Google Patents

Description

July 3U, 1968 n J. L. MARTIN 3,394,955

CHECK RAIL LOCK Filed June 20, 2 Sheets-Sheet 1 :i Cl-Eril J v afeor':

Z6 M E July 30, 1968 J. L. MAR-TIN 3,394,955

CHECK RAIL LOCK Filed June 20, 1966.

'2 Sheets-Sheet 2 United States Patent 3,394,955 CHECK RAIL LOCK Jerry L. Martin, Owatonna, Minn., assiguor to Truth Toll Co., a corporation of Minnesota Filed June 20, 1966, Ser. No. 558,642 2 Claims. (Cl. 292-113) ABSTRACT OF THE DISCLOSURE This invention is a toggle type window lock for double hung windows comprising a catch means on the top sur- 'face of the bottom sas'h of the top window and a latch means on the top surface of the top sash of the bottom window. The latch means is pivoted about a link which is in turn pivoted on the top sash and held in the engaged position by a `second catch member.

This invention relates to a toggle type window lock for use with double hung windows having adjacent upper and lower sashes and more particularly to lsuch a window lock having manualy releasably 'safety lock structure.

A toggle type window lock such as those shown in the patent to Ander-son 3,109,675 has as one of its cooperating parts a narrow catch which is conveniently mounted upon a narrow sash rail. The other part of the lock is comprised of a cap or lever portion .and associated elements which cooperate with the catch in locking the win- `down. The cap has a toggle connection between it and a second sash rail to `draw the catch toward the second sash to a locked position. This invention pertains to an improvement for such toggle locks and is comprised of a means for retaining the lock in its locked position to prevent the lock from disengaging on relative lateral movement between the two sashes. The retaining means is located to be easily grapsed .and released by ones tingers simultaneously with grasping the lever portion of the lock to permit disengagement of the cap lfrom the catch.

It is, therefore, t'he principal object of this invention to provide a new and improved toggle type window lock.

It is a further object of this invention to provide a manu-ally released retaining means associated with the cap or lever portion of the toggle lock to prevent the lock from becoming unlocked -or disengaged on relative movement of the two sashes, said retaining Imeans being easily grasped and released simutaneously with grasping the lever portion of the lock.

It is still another object of this invention to provide ia toggle type window lock of the character described wherein the retaining means is located for easy grasping and releasing by the fingers simultaneously with -grasping the lever portion of the lock to permit disengagement of the lock.

Other objects and advantages will become readily apparent from the following detailed description taken in connection with the accompanying drawings in which:

FIG. l is a plan view of a toggle type window lock embodying the in-vention in association with a double hung window, with a portion of the cap cut away to facilitate the illustration;

FIG. 2 is a vertical section, taken generally along the line 2 2 of FIG. 1;

FIG. 3 is a side elevation view of the lock in association with a window;

FIG. 4 is a vertical section, taken generally along the line 4-4 of FIG. 1, with the retaining member pivoted to its raised position to permit disengagement of the lock;

FIG. 5 is a view of the lock similar to that of FIG. 4 with the lock in a rst position of initial engagement; and

FIG. 6 is a view of the lock of FIG. 5 in a sequential ICC position just prior to- 'becoming wholly engaged and retained.

While this invention is susceptible of embodiment .in many different forms, there is shown in the drawings and will herein tbe described in detail an embodiment of the invention with the understanding that the present disclosure is to Vbe considered as an exemplification of the principles of the invention and is not intended to limit the invention to the embodiment illustrated. The scope of the invention will be pointed out in the appended claims.

As shown in FIG. 2, the toggle type window lock of the present invention is comprised of four major cooperating parts, namely, a latch means in the form of a split cap, generally designated 12, which with its associated elements is mounted to the top surface of an upper horizontal sash rail 14 of the lower sash 16 of a double hung window, a first catch means indicated generally at 18 which is adapted for mounting on the lower sash rail 20 of the upper sash 22 of the double hung window, a releasable retaining means indicated generally at 24 pivotally mounted to the split cap 12, and a mounting base plate 26 having a second catch means indicated generally at 27 cooperating with the retaining member 24 to prevent disengagement of the window lock on relative movement of the two sashes.

The rst catch 18 extends along the lower sash rail 20 and has an upright portion 28 terminating in an outer Ihook portion 28a extending horizontally away from the lower sash 16. The first catch is adapted to be atiixed to the lower rail 20 of the upper sash 22 with the upright portion extending upwardly from the bottom rail adjacent the inner face 30` of the upper sash 22.

The mounting base plate 26 is adapted for mounting on the upper rail 14 of the lower sash 16 across from the tirst catch 18 and has an upright portion 31 extending along the upper rail 14 of the lower sash 16. The upright portion 31 has spaced slots 32 therethrough which form the second catch means for receiving the retaining member 24 (as hereinafter described). Integral with the base member are upright arms 34 rising from opposite ends of the base. Upon the upright arms 34 is pivotally mounted a rear cap part, generally designated 36, of the spit cap 12, as at the pivot shaft 38 extending transversely between arms 34. The rear part has a manually engageable exposed lip 39 for easy grasping to pivot the latch means or split cap 12 about shaft 38. Extension 40a (FIG. 3) of a forward cap part 40 are pivotally attached to the middle of the rear cap part 36 as at pivot shaft 42 extending transversely beneath the rear part to provide a toggle arrangement similar to that disclosed in the aforementioned patent. The rear cap part 36 has arms 36a extending beneath the front cap part 40 and pivoted on shaft 38. Along its forward edge, the forward cap part 40 has a transverse locking hook portion 43 which engages the hook portion 28a of the rst catch means 18 to hook the window sashes together when the window is closed. Torsion spring arm 44a of torsion spring 44, wound around shaft 42, forces the forward cap part 40` upwardly away from the catch 18. Simultaneously therewith, torsion spring 46, wrapped around shaft 38, forces the rear cap part 36 downwardly upon the mounting base 26. Spring arm 46a of torsion spring 46 forces the retaining member 24 in a locked position, as shown in FIG. ,2.

It is to be understood that although in the embodiment shown the torsion springs 44 and 46 are mounted on pivot shafts 42 and 38, respectively, their positions can be otherwise changed without effecting the operation of the lock. Also, the novel retaining member 24 of this invention (as subsequently described) may be employed with an integral cap and link type latch means, as shown in the various embodiments in the aforementioned patent, as well as with the split cap form of toggle lock shown in the drawings herein. The same toggle type leverage is afforded in either form.

The locking operation of a toggle type lock as above described is accomplished by grasping the lip 39 of the rear cap part 36 of the split cap 12, tilting the cap forwardly about pivot shaft 38 to permit the cap locking hook 43 to be extended over the catch hook 28a. Then by applying downward pressure upon the rear cap part 36, as seen by the arrow A in FIG. 5, cap locking hook 43 and catch hook 28a become engaged in a first position of locking, as illustrated in FIG. 5. A further downward pressure on the rear cap part in the direction of arrow B, FIG. 6, causes the forward cap part 40 to become seated upon the upright arms 34 of the mounting base plate 26 and draws the catch 18, and the sash 22 to which it is mounted, inwardly toward sash 16. This locking engagement causes the opening between the adjacent sashes to become tightly closed thereby making tampering with the lock from without practically impossible and precludes the entrance of dust or other elements from entering therethrough.

Up to this point, the structure described is generally Old and movement of the upper sash 22 in the direction of arrow C, FIGS. 2 and 3, relative to lower sash 16 can cause the toggle lock to become disengaged as the forward cap part 40 is pivoted about shaft 42 extending transversely beneath cap 36 which is pivoted about shaft 38 which is xed to the lower shash by mounting plate 26, thus moving cap 36 opposite to arrows A and B, and thus allowing cap 40 to become disengaged from catch 18.

The movement of lower sash 16 in direction of arrow E, FIGS. 2 and 3, relative to upper sash 22 can cause the toggle lock to become disengaged as the forward cap part 40 is seated upon upright arms 34, pivoted about shaft 42 beneath cap 36 which is pivoted about shaft 38 that is fixed to lower sash by mounting plate 26, thus extensions 40a are cammed upward moving cap 36 in opposite direction to arrows A and B allowing cap 40 to become disengaged from catch 18. The retaining member 24 of this invention is designed to prevent such disengagement of the lock.

The releasable retaining member 24 extends beneath the lip 39 of the rear cap part 36 and has ears 47 pivotally mounted to shaft 42 under the rear cap part. The retaining member pivots about shaft 42 from a retaining position (FIG. 2) wherein forwardly extending tongues 48 (FIG. 1) of the retaining member extend into slots 32 in the upright portion of the mounting base plate 26 to provide coacting lock means between the mounting plate and the retaining member. In this locked position, there can be no relative movement between the sashes because the locking hook portion 43 of the split cap is rigidly locked to the first catch 18 secured to the upper sash and the retaining member 24 is rigidly locked to the mounting base plate 26 secured to the lower sash. Spring arm 46a urges the retaining member into its locked position. The retaining member 24 has a grasping flange 50 entending rearwardly from ears 47 and underlying lip 39 of the rear cap part 36 and is easily grasped with the lip in a manner best illustrated in FIG. 4. Initial squeezing in the direction of arrow D (FIG. 4) causes the retaining member 24 to pivot about shaft 42 against spring 46 and move tongues 48 out of slots 32 so that the cap can be elevated from the mounting base in a direction opposite to arrows B and A in FIGS. 6 and 5, respectively, to disengage the locking portion of the forward cap part from the first catch 18. It can be seen that the retaining member is conveniently located for easy grasping and releasing by ones fingers simultaneously with grasping the lip 39 of the rear cap part 36 of the split cap 12 to permit sequential releasing and disengaging the lock in a single motion.

I claim:

1. A lock for a double hung window having a bottom sash with a top rail and a top sash with a bottom rail, said lock including: a first catch adapted to be afiixed to the bottom rail of said top sash; a latch means having a locking portion selectively engageable with said first catch and a toggle connection connecting the latch means to the top rail of said bottom sash, said toggle connected latch means being pivotable to cause said locking portion to be engaged with said first catch to draw said first catch and top sash toward the bottom sash to a locked position and to cause said locking portion to be disengaged from said first catch to permit one or both of the windows to be moved with respect to each other, said latch means including an easily graspable exposed lip t0 facilitate pivoting the latch means; a second catch adapted to be aflixed to said top rail of the ybottom sash adjacent said latch means a releasable member pivotally secured to said latch means and selectively engageable with said second catch to retain the locking portion of said latch means in its locked position with said first catch, said releasable member having a transverse fiange underlying and spaced from the exposed lip on said latch means, said flange being movable toward said lip on simultaneous grasping of said flange and said exposed lip, the movement of said flange toward said lip causing disengagement of said releasable member to sequentially disengage said releasable member from said second catch and disengage the locking portion of said latch means from said first catch and means urging said releasable ymember into engagement with said second catch.

2. A toggle type window lock for use with a double hung window having an upper and a lower sash in planes offset from each other and top and bottom rails respectively in abutting relation when the window is closed, comprising, a first catch adapted for attachment to sairl bottom rail, a latch means for selective engagement with the rst catch, a mounting plate for the latch means adapted for attachment to said bottom rail, said latch means having a two-part cap lying generally in a plane normal to the planes 0f said upper and lower sashes with one part having a locking portion for engaging said first catch, the cap second part extending beneath said one part and pivotally mounted on said mounting plate, the cap second part having a shaft extending transversely therebeneath and pivotally mounting said one part thereon, said second part extending to the rear of said one part and providing a manually engageable lip for movement of said cap, a releasable retaining member pivoted on said shaft and having a flange extending rearwardly from said shaft and spaced from and underlying said lip, coacting lock means on said mounting plate directly beneath said shaft and said retaining member including interengaging tongue and slot means, said tongue and slot means having interengaging surfaces lying in planes generally perpendicular to forces through said shaft tending to move the cap about its pivot point on said mounting plate, and means urging said coacting lock means into locking engagement so that said flange on said releasable member may be squeezed toward said lip against said urging `means to sequentially release said coacting lock means, elevate said two-part cap from said mounting plate and release the locking portion of said cap from said first catch.

References Cited UNITED STATES PATENTS 3,109,675 11/1963 Anderson 292-109 3,237,978 3/1966 Swanson 292-113 MARVIN A. CHAMPION, Primary Examiner.

I. R. MOSES, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION` Patent No. 3,394,955 July 30, 196s Jerry L. Martin It is certified that error appears n the above identified patent and that said Letters Patent are hereby corrected as shown below:

In the heading to the printed specification, line 4, "Truth Toll Co." should read Truth Tool Co.

Signed and sealed this 16th dy of December 1969.

(SEAL) Attest:

WILLIAM E. SCHUYLER, IR.

Commissioner of Patents Edward M. Fletcher, Jr.

Attesting Officer

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