Window sash

Claim 1

IN A WINDOW SASH, THE COMBINATION OF, A FIRST ELONGATED SASH RAIL HAVING A FIRST LONGITUDINAL GROOVE ON ONE SIDE SHAPED TO RECEIVE ONE EDGE OF A WINDOW, A SECOND LONGITUDINAL GROOVE ON THE OPPOSITE SIDE, AND AN INTERMEDIATE LONGITUDINALLY EXTENDING PASSAGE OPENING THROUGH ONE END OF SAID RAIL; A RACK BAR TELESCOPED ENDWISE INTO SAID SECOND GROOVE AND HAVING TEETH ON ONE SIDE EXTENDING TOWARD THE OPEN SIDE OF SAID SECOND GROOVE; AN L-SHAPED CORNER KEY HAVING A FIRST LEG TELESCOPED INTO SAID PASSAGE WITH A SNUG FIT AND A SECOND LEG DISPOSED AT A PREDETERMINED ANGLE WITH SAID FIRST SLEG AND SAID FIRST RAIL AT SAID ONE END; A SECOND ELONGATED SASH RAIL HAVING A LONGITUDINAL GROOVE ON ONE SIDE SHAPED TO RECEIVE ANOTHER EDGE OF THE WINDOW, AND A SECOND LONGITUDINALLY EXTENDING PASSAGE OPENING THROUGH ONE END OF SAID SECOND RAIL AND SIZED TO RECEIVE SAID SECOND KEY LEG WITH A SNUG FIT, SAID RAIL ENDS BEING SHAPED TO FORM A MITER JOINT AND FITTED TOGETHER WITH SAID RAILS AT SAID ANGLE WITH EACH OTHER AND WITH SAID SECOND KEY LEG TELESCOPED INTO SAID SECOND PASSAGE TO HOLD THE RAILS TOGETHER; A THIRD LONGITUDINAL PASSAGE FORMED IN SAID SECOND RAIL AND OPENING THROUGH SAID END THEREOF LEVEL WITH THE ADJACENT END OF SAID GROOVE; AND A ROLLER ASSEMBLY INCLUDING A MOUNTING BRACKET COMPRISING TWO LEGS TELESCOPED SNUGLY INTO THE ADJACENT END PORTIONS OF SAID THIRD PASSAGE AND SAID SECOND GROOVE, RESPECTIVELY, AND A ROLLER DISPOSED IN SAID SECOND GROOVE AND JOURNALED ON SAID BRACKET WITH THE PERIPHERY OF THE ROLLER ADJACENT SAID OPEN SIDE OF SAID SECOND GROOVE, SAID SECOND GROOVE AND THE BRACKET LEG THEREIN BEING FORMED WITH OPPOSED ABUTMENT SURFACES LOCKING THE BRACKET AGAINST MOVEMENT TOWARD THE OPEN SIDE OF THE GROOVE, AND WITH ADDITIONAL ABUTMENT SURFACES SECURELY HOLDING SAID RACK BAR IN THE GROOVE.