| 摘要 |
A portable entry device comprising two members (12, 16) rotatable one relative to the other into any one of a plurality of preselected relative positions, one of said members (12) being a housing of the device; means (18) coupled to said members for sensing the relative positions of said members and generating a respective electrical signal identifying each said position; and means (24) actuable for enabling transmission of said signal to a store. |
