Sliding support with adjustable shock block

Claim 1

A SLIDE MECHANISM COMPRISING A FIRST MEMBER HAVING A CHANNEL THEREIN, A SECOND MEMBER HAVING A CHANNEL THEREIN, SAID SECOND MEMBER BEING SLIDABLY MOUNTED IN THE CHANNEL OF SAID FIRST MEMBER, AND A THIRD MEMBER SLIDABLY MOUNTED IN THE CHANNEL OF SAID SECOND MEMBER, SAID FIRST MEMBER HAVING AN ADJUSTABLE SHOCK BLOCK MOUNTED THEREON ADJACENT ITS INNER END, SAID THIRD MEMBER HAVING A SLOT FORMED IN ITS INNER END, SAID SHOCK BLOCK ENGAGING A PORTION OF SAID THIRD MEMBER ADJACENT SAID SLOT WHEN SAID MEMBERS ARE CLOSED, A PAIR OF SPRING BIASED LATCHES MOUNTED IN A RECESS IN THE UNDERSURFACE OF SAID THIRD MEMBER, A SLOT FORMED IN SAID SECOND MEMBER ADJACENT THE END THEREOF, SAID LATCHES BEING URGED OUT OF SAID RECESS TO COOPERATE WITH SAID SLOT AND SAID END TO LOCK SAID THIRD MEMBER AGAINST MOVEMENT IN EITHER DIRECTION RELATIVE TO SAID SECOND MEMBER WHEN SAID THIRD MEMBER IS WITHDRAWN A PREDETERMINED DISTANCE, AND MEANS MOUNTED ON SAID SECOND MEMBER FOR COOPERATING WITH AN OPENING IN SAID FIRST MEMBER FOR PREVENTING RELATIVE MOVEMENT OF SAID FIRST AND SECOND MEMBERS WHEN SAID SECOND MEMBER IS WITHDRAWN A PREDETERMINED DISTANCE, SAID MEANS BEING ENGAGEABLE BY SAID THIRD MEMBER TO RELEASE SAID FIRST AND SECOND MEMBERS.