公开(公告)号：US3840866A

公开(公告)日：1974-10-08

申请号：US33074873

申请日：1973-02-08

Applicant: TEXTRON INC

Inventor： CLAIR T ,  WELTZ R

IPC: G06M3/06 ,  G08C19/28

CPC classification number: G06M3/06

Abstract: There is disclosed apparatus for reading a meter, located in a building or other enclosure out of sight from the exterior of the building, by bringing a portable unit, which may be carried by meter reading personnel, into proximity with a fixed unit which is accessible from the exterior of the building, the fixed unit being connected to and responsive to an encoder register mounted on the meter, the communication between the fixed unit and the portable unit being solely by radiant energy, the fixed unit and the portable unit each having radiant energy emitting means and radiant energy receiving means, radiant energy emissions from the fixed unit transmitting binary coded decimal signals to the receiving means in the portable unit, and the radiant energy emissions from the portable unit transmitting decimal order selection signals to the receiving means in the fixed unit.