Articulated tower construction

Claim 1

FOR USE IN AN AERIAL TOWER, A LOWER ELONGATED BOOM HAVING OPPOSITE ENDS, MEANS SUPPORTING ONE END OF SAID BOOM FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS, AN UPPER ELONGATED BOOM HAVING FIRST AND SECOND ENDS, THE OTHER END OF SAID LOWER BOOM AND THE FIRST END OF SAID UPPER BOOM BEING CONNECTED TOGETHER FOR PIVOTAL MOVEMENT ABOUT AN ELBOW AXIS WHICH IS SUBSTANTIALLY PARALLEL TO THE FIRST-MENTIONED AXIS THEREBY PROVIDING AN ELBOW, MEANS FOR RAISING AND LOWERING SAID LOWER BOOM ABOUT SAID FIRST-MENTIONED AXIS, POWER MEANS HAVING FIRST AND SECOND OPPOSITE END PORTIONS WHICH ARE MOVABLE TOWARD AND AWAY FROM EACH OTHER, MEANS MOUNTING SAID POWER MEANS ON SAID LOWER BOOM FOR MOVEMENT LONGITUDINALLY OF THE LATTER, MEANS PIVOTALLY CONNECTING SAID FIRST END PORTION OF SAID POWER MEANS TO A SUPPORT WHICH IS FIXED RELATIVE TO SAID FIRST-MENTIONED AXIS, SAID ELBOW HAVING GUIDING MEANS RADIALLY SPACED OUTWARDLY FROM SAID ELBOW AXIS, A FIRST CABLE PASSING AROUND AND ENGAGING SAID GUIDING MEANS AND BEING OPERATIVELY CONNECTED AT ONE END TO THE SECOND END PORTION OF SAID POWER MEANS AND AT THE OTHER END TO A POINT ON SAID UPPER BOOM WHICH IS SPACED FROM SAID GUIDING MEANS WHEREBY MOVEMENT OF SAID SECOND END PORTION TOWARD SAID FIRST-MENTIONED AXIS RESULTS IN SWINGING SAID UPPER BOOM UPWARDLY AWAY FROM SAID LOWER BOOM.