ADT Telegraph Register

ADT telegraph register. The maker appears to be Foote, Pierson, in N.Y. It is built primarily of brass, with a cast iron base. It has two separate marking circuits, the ADT label on the rear says 6 ohms, Type 276 Recorder. These registers were used in the ADT Central stations to receive coded signals from various transmitters in the field, via a McCullough circuit. The register printed dots and dashes on a thin paper tape roll that was installed in the rear bracket of the register. The left and right sides of the tape received signals from separate McCullough circuits, thus two circuits per register. Some ADT offices had over 200 of these registers. These registers were wound up each shift by the central station operators / Armed Service Investigators.