公开(公告)号：US3565276A

公开(公告)日：1971-02-23

申请号：US3565276D

申请日：1968-09-27

Applicant: NORRIS INDUSTRIES

Inventor： O'BRIEN JAMES ,  BESSO RICHARD A

IPC: H02G3/18 ,  H02G3/12 ,  H02G3/14

CPC classification number: H02G3/185

Abstract: A two-piece adjusting ring for use with a standard electrical floor box which latter includes a threaded handhole in the top, the adjusting ring including a threaded section or collar rotatable with respect to the box to couple them together at the situs of the installation of the box, and a separate flange adapted to overlie a floor surface or covering closely adjacent the collar and adapted to remain rotationally stationary while the collar is being advanced, the collar and flange being provided with mutually engaging smooth surfaces whereby the collar imparts a thrust upon the flange without rotating the latter.