Horizontal bar and spring-biassed exercising apparatus

Claim 1

IN COMBINATION A RELATIVELY FIXED BAR, AN ISOMETRIC EXERCISING DEVICE FOR USE WITH SAID RELATIVELY FIXED BAR COMPRISING: A RIGID FRAME HAVING LONGITUDINALLY ALIGNED FIXEDLY CONNECTED ANCHORING AND SPRING-HOUSING PARTS, SAID ANCHORING PART HAVING A STOP PORTION INTERMEDIATE LONGITUDINALLY OPPOSITE ENDS OF THE FRAME; A MEMBER LONGITUDINALLY SHIFTABLY MOUNTED ON SAID SPRING-HOUSING PART TO BE MOVABLE TOWARD AND FROM SAID STOP PORTION; COMPRESSION SPRING MEANS MOUNTED IN SAID SPRING-HOUSING PART YIELDINGLY TO URGE SAID MEMBER TOWARD SAID STOP PORTION; SAID STOP PORTION AND SAID MEMBER HAVING OPPOSED SEAT MEANS THEREIN FOR YIELDING RECEPTION OF THE RELATIVELY FIXED BAR THEREBETWEEN TO RETAIN SAID RIGID FRAME IN STATIC ENGAGEMENT WITH SAID BAR ACCORDING TO GIVEN ISOMETRIC POWER OF SAID SPRING MEANS; AND AT LEAST ONE INEXTENSIBLE HAND GRIP MEANS ON SAID RIGID FRAME, FOR APPLYING MUSCULAR FORCE TO THE FRAME THROUGH THE FIXED BAR TO SEPARATE SAID MEMBER FROM SAID ANCHORING PART TO A RELATIVELY LIGHT EXTENT WHEN SAID GIVEN ISOMETRIC POWER IS EXCEEDED; WHEREBY ANY APPRECIABLE MEASURE OF MOVEMENT OF SAID MEMBER AGAINST SAID SPRING CAUSED BY APPLICATION OF SAID MUSCULAR FORCE SERVES ISOMETRICALLY TO INDICATE PROGRESS IN MUSCULAR DEVELOPMENT BY USE OF THE DEVICE. 6.IN APPARATUS OF THE CHARACTER DESCRIBED FOR USE IN A DOOR FRAME HAVING LATERALLY OPPOSED DOOR POSTS, COMPRISING A PAIR OF ELONGATED STRIP PORTIONS OF RIGID MATERIALS; AND HAVING SERIES OF LONGITUDINALLY SPCED APERTURES THEREIN; MEANS FOR SECURING SAID STRIP PORTIONS ON THE OPPOSED DOOR POST TO HAVE THE APERTURES THEREOF IN VERTICAL SERIES OF HORIZONTALLY ALIGNED PAIRS OF THE SAME; AND AN EXTENSIBLE BAR HAVING TELESCOPICALLY CONNECTED PARTS AND OPPOSITE END PROTUBERANCES; SAID TELESCOPICALLY CONNECTED PARTS INCLUDING LOST-MOTION, SCREW-ACTION MEANS FOR LIMITED LONGITUDINAL ADJUSTMENT OF SAID BAR COUPLED WITH SCREW ADJUSTMENT OF THE CONNECTED PARTS TOWARD AND FROM SUPPORTING RECEPTION OF THE END PROTUBERANCES IN SAID PAIR OF OPPOSED BUT ALIGNED APERTURES, TO SUPPORT THE BAR BETWEEN THE STRIPS.