Vented window latch

Claim 1

A LATCHING DEVICE FOR USE IN A WINDOW HAVING OUTER AND INNER SASHES MOVABLE RELATIVE TO EACH OTHER BETWEEN A CLOSED POSITION AND A VENTED POSITION, THE OUTER SASH HAVING A REVERTED HOOK KEEPER MEANS, WITH A BASE OF THE LATTER MEANS SECURED TO SAID SASH, AND THE INNER SASH HAVING A LATCHING MEANS SECURED THERETO, SAID LATCHING MEANS INCLUDING A ROTATABLY MOUNTED CAM TYPE LOCKING MEMBER FOR DETACHABLY ENGAGING SAID KEEPER MEANS WHEN SAID SASHES ARE IN SAID CLOSED POSITION, SAID DEVICE COMPRISING AN ELONGATED PLANAR BODY MEMBER HAVING END PORTIONS, THE LENGTH OF SAID ELONGATED MEMBER APPROXIMATELY THE DISTANCE ONE SASH IS MOVED FROM A CLOSED TO A VENTED POSITION, A FIRST AUXILIARY LOCKING MEANS AT ONE END OF SAID ELONGATED MEMBER ENGAGEABLE WITH SAID KEEPER MEANS ON SAID OUTER SASH AND INCLUDING BOTH AN AXIALLY ALIGNED REVERTED HOOK WHICH IS ENGAGEABLE WITH THE INSIDE OF SAID REVERTED HOOK OF SAID KEEPER MEANS TO PREVENT BY COMPRESSION THEREBETWEEN LONGITUDINAL MOVEMENT THEREOF AND TO PREVENT TRANSVERSE SEPARATORY MOVEMENT THEREBETWEEN, AND A PAIR OF FLANGE MEMBERS RIGHT ANGULARLY DISPOSED WITH RESPECT TO THE PLANE OF SAID BODY MEMBER AND SPACED ON EACH SIDE OF SAID REVERTED HOOK AND DIRECTED TOWARDS THE BASE OF THE KEEPER TO PREVENT RELATIVE MOVEMENT OF SAID ONE END OF THE ELONGATED MEMBER TOWARDS SAID HOOK BASE AND TO PREVENT LONGITUDINAL COMPRESSIVE MOVEMENTS BETWEEN SAID FLANGE MEMBERS AND THE ADJACENT SASH OF THE OUTER WINDOW, AND A SECOND AUXILIARY LOCKING MEANS AT THE OTHER END OF SAID ELONGATED MEMBER, SAID LATTER LOCKING MEANS POSSESSING PRESSURE MEMBERS WHICH ARE ENGAGEABLE FROM BELOW WITH SAID INNER SASH, AND ALSO HOOK MEANS ENGAGEABLE FROM ABOVE WITH SAID ROTATABLY MOUNTED CAM LATCHING MEANS ON SAID INNER SASH, TO COOPERATIVELY PREVENT LONGITUDINAL MOVEMENT BETWEEN SAID ELONGATED MEMBER AND SAID INNER SASH, WHEN SAID SASHES ARE IN SAID WINDOW VENTED POSITION.