Mobile traction unit

Claim 1

A MOBILE TRACTION UNIT COMPRISING A VERTICALLY EXTENDING STANDARD MEMBER HAVING A LOWER PORTION AND A CO-AXIALLY EXTENDING UPPER PORTION, (1) A FLAT BASE MEMBER FIXED TO SAID LOWER PORTION OF SAID STANDARD MEMBER, AND AT LEAST THREE SPACED APART CASTER WHEELS FIXED ON THE UNDERSIDE OF SAID BASE MEMBER, (2) SAID UPPER PORTION OF SAID STANDARD MEMBER INCLUDING A FULL LENGTH FLUID CYLINDER UNIT HAVING THEREIN A PISTON ROTATABLE WITHIN SAID CYLINDER, AN AXIALLY UPWARDLY EXTENDING PISTON ROD CONNECTED TO SAID PISTON AND HAVING AN UPPER END WHICH EXTENDS VERTICALLY BEYOND SAID FLUID CYLINDER IN ALL POSITIONS OF SAID PISTON, (3) FLUID SUPPLY AND EXHAUST MEANS CONNECTED TO SAID FLUID CYLINDER AND LOCATED ADJACENT THERETO TO SELECTIVELY CONTROL THE RAISING AND LOWERING OF SAID PISTON AND PISTON ROD, (4) PRESSURE INDICATING MEANS INDEPENDENTLY OPERATIVELY CONNECTED TO THE INSIDE OF SAID FLUID CYLINDER AND ALSO LOCATED ADJACENT SAID FLUID CYLINDER, (5) A HORIZONTAL ARM FIXED AT ONE END TO SAID UPPER END OF SAID PISTON ROD SO AS TO PARTAKE OF ITS VERTICAL MOVEMENTS AND SO AS TO ROTATE IN A HORIZONTAL PLANE, (6) A CLAMPING MEANS ADJUSTABLY SECURED FOR VERTICAL MOVEMENT AROUND THE LOWER PORTION OF SAID STANDARD AND NEAR SAID FLUID CYLINDER, SAID CLAMPING MEANS SO DESIGNED AS TO SELECTIVELY SECURE EITHER A SINGLE TRACTION CABLE OR A PLURALITY OF TRACTION CABLES THEREON,