Hydraulically operated lazy tongs structure

Claim 1

IN COMBINATION IN A LAZY TONGS STRUCTURE, A SUPPORTING FRAME HAVING HORIZONTAL TOP AND BOTTOM MEMBERS IN A FIXED VERTICALLY SPACED RELATIONSHIP, A VERTICAL STANDARD MOUNTED FOR SUPPORT BETWEEN SAID TOP AND BOTTOM FRAME MEMBERS, AN ELONGATED GUIDE MEMBER PIVOTALLY SUSPENDED ON A HORIZONTAL AXIS AT ITS UPPER END ON THE UPPER END PORTION OF SAID STANDARD ADJACENT SAID TOP FRAME MEMBER AND DISPOSED ALONGSIDE SAID STANDARD, A LAZY TONGS BOOM DISPOSED IN A VERTICAL PLANE AND PIVOTALLY SUSPENDED ON A HORIZONTAL AXIS AT THE UPPER END OF ITS INNER END PORTION RELATIVE TO THE UPPER ENDS OF SAID STANDARD AND GUIDE MEMBER AND HAVING ITS LOWER INNER END PORTION SUPPORTED ON SAID GUIDE MEMBER FOR UP AND DOWN MOVEMENT, POWER OPERABLE JACK MEANS CARRIED VERTICALLY ON THE LOWER END PORTION OF SAID GUIDE MEMBER AND OPERATIVELY CONNECTED WITH THE LOWER INNER END PORTION OF SAID LAZY TONGS BOOM TO CAUSE EXTENSION AND RETURN OF SAID BOOM, A LOAD CARRIER MOUNTED ON THE OUTER END OF SAID BOOM, AND POWER OPERABLE JACK MEANS CARRIED HORIZONTALLY ON SAID STANDARD AND OPERATIVELY CONNECTED WITH THE LOWER END PORTION OF SAID GUIDE MEMBER TO SWING IT AND SAID LAZY TONGS BOOM WITH IT UPWARDLY RELATIVE TO SAID STANDARD TO RAISE THE LOAD CARRIER AND SUPPORT IT AT DIFFERENT SELECTED ELEVATIONS.