Demountable building partition construction

Claim 1

IN A BUILDING PARTITION CONSTRUCTION, THE COMBINATION COMPRISING: AN ELONGATE CHANNEL HAVING A CENTRAL WALL AND FIRST AND SECOND SPACED SIDE WALLS EXTENDING THEREFROM AT SUBSTANTIALLY RIGHT ANGLES THERETO, SAID SIDE WALLS BEING LOCATED INWARDLY FROM THE PROXIMATE SIDE EDGES OF SAID CENTRAL WALL, THE FIRST OF SAID SIDE WALLS HAVING A BOSS FORMED AT THE FREE END THEREOF, SAID BOSS HAVING A SLOT FORMED THEREIN ANGULARLY DISPOSED IN RESPECT TO SAID CENTRAL WALL AT AN ANGLE OF LESS THAN 90* AND EXTENDING LONGITUDINALLY THEREOF; A DETACHABLE FLANGE INCLUDING A TONGUE PORTION ADAPTED TO SLIDABLY MOUNT INTO SAID SLOT FOR SUPPORT BY SAID BOSS WHEREIN THAT PORTION OF THE DETACHABLE FLANGE NOT ENTERING SAID SLOT IS DISPOSED PARALLEL TO SAID CENTRAL WALL WITH THE ANGLE OF SAID TONGUE PORTION RELATIVE TO SAID CENTRAL WALL SELECTED TO CAUSE THE TONGUE TO BIND WITHIN THE SLOT AND REMAIN SECURED IN THE EVENT OF MOVEMENT OF SAID DETACHABLE FLANGE ALONG A LINE NORMAL TO THE CENTRAL WALL; AN ELONGATE COVER PLATE SHAPED TO FORM A CLOSURE FOR SAID CHANNEL BETWEEN SAID SIDE WALLS AND DEFINE A SERVICE RACEWAY WITHIN THE BOSOM OF THE CHANNEL;