Molded plastic skates

Claim 1

IN AN ADJUSTABLE-LENGTH SKATE, IN COMBINATION: RESPECTIVE FORWARD AND REAR BEAM SECTIONS, BOTH OF MOLDED PLASTIC MATERIAL, ONE BEING A TUBULAR BOX BEAM OF GENERALLY RECTANGULAR CROSS-SECTION AND THE OTHER INCLUDING A BEAM BODY SLIDABLY TELESCOPED WITHIN SAID BOX BEAM AND HAVING UPPER AND LOWER LONGITUDINAL SIDE MARGINS FITTED IN THE LONGITUDINALLY EXTENDING INTERNAL CORNERS OF SAID BOX BEAM WITH FREE-SLIDING CLEARANCE; LOCOMOTION SUPPORTS CARRYING THE FORWARD AND REAR ENDS OF SAID BEAM SECTIONS RESPECTIVELY; SAID BOX BEAM INCLUDING A BOTTOM WEB PROVIDED WITH A LONGITUDINALLY EXTENDING LATCH SLOT HAVING PAIRS OF LATERALLY OPPOSED KEEPER NOTCHES AND INTERVENING PAIRS OF KEEPER TEETH LATERALLY SPACED, WITH NARROWED GAPS BETWEEN THEIR OPPOSED EXTREMITIES, AND A LATCH COMPRISING A PLUNGER SLIDABLE VERTICALLY IN SAID BEAM BODY AND A BOLT HAVING OPPOSITE SIDE PORTIONS THEREOF ENGAGEABLE IN A SELECTED PAIR OF SAID NOTCHES TO LATCH SAID BEAM SECTIONS TO ONE ANOTHER IN A SELECTED LENGTH ADJUSTMENT, SAID PLUNGER HAVING A SHOULDER LOWER END FROM WHICH SAID BOLT PROJECTS DOWNWARDLY, SAID SHOULDERED LOWER END BEING NORMALLY SEATED UPON SAID BOTTOM WEB SO AS TO POSITION SAID BOLT IN SAID SLOT; SAID LATCH BEING YIELDABLE UPWARDLY IN RESPONSE TO FINGERTIP PRESSURE AGAINST ITS LOWERE END, TO RELEASE SAID BOLT FROM SAID NOTCHES SO AS TO PERMIT ADJUSTMENT OF THE SKATE FOR LENGTH.