Extensible chassis slide

Claim 1

IN A SLIDE ASSEMBLY FOR SUPPORTING A CHASSIS IN A CABINET, THE COMBINATION COMPRISING: AN ELONGATED GENERALLY CHANNEL-SHAPED FIXED SECTION HAVING OPPOSITE LONGITUDINALLY EXTENDING EDGES REVERSELY BENT TOWARDS ONE ANOTHER TO DEFINE A PAIR OF TRACKS; AN ELONGATED INTERMEDIATE SECTION HAVING OPPOSITE LONGITUDINALLY EXTENDING EDGES OF A CONFIGURATION MATINGLY COMPLEMENTARY TO SAID TRACKS TO BE SLIDABLY SUPPORTED ON SAID FIXED SECTION, SAID INTERMEDIATE SECTION HAVING A WEB SUPERIMPOSED ON A WEB OF SAID FIXED SECTION, THE EDGES OF SAID INTERMEDIATE SECTION HAVING TERMINAL PORTIONS EXTENDING TOWARDS ONE ANOTHER TO DEFINE A PAIR OF TRACKS ON SAID INTERMEDIATE SECTION; AN ELONGATED GENERALLY CHANNEL-SHAPED SMALL SECTION HAVING OPPOSITE LONGITUDINALLY EXTENDING EDGES THAT ARE SLIDABLE IN AND MATINGLY COMPLEMENTARY TO SAID TRACKS OF SAID INTERMEDIATE SECTION AND HAVING A WEB OFFSET FROM THE WEB OF SAID INTERMEDIATE SECTION TO DEFINE A CLEARANCE SPACE BETWEEN SAID WEBS; A LATCH SPRING MOUNTED ON THE INNER FACE OF THE WEB OF SAID SMALL SECTION IN SAID CLEARANCE SPACE AND WHOSE FREE END EXTENDS FORWARDLY OF SAID INTERMEDIATE SECTION; A BUTTON ON THE FREE END OF SAID LATCH SPRING AND BIASED THEREBY AGAINST THE INNER FACE OF THE WEB OF SAID INTERMEDIATE SECTION AND INTO A HOLE FORMED IN THE WEB OF SAID INTERMEDIATE SECTION WHEN MOVED INTO REGISTRATION WITH SAID HOLE WHEREBY TO INTERLOCK SAID SMALL SECTION AND INTERMEDIATE SECTION, SAID BUTTON HAVING UNIDIRECTIONAL DRIVING ENGAGEMENT