The New York Times

Police Use Old and New Systems As Teletype Circuit Breaks Down; Pneumatic Tube and Two-Way Radio Help to Maintain Communications in 16-Hour Pause -- Cause Is Undetermined

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Morkrum teletype transmitter and receiver

Paper reel mounted underneath unit. The unit has a Qwerty keyboard. This unit was developed by the Morkrum Company, and applied for wireless transmission from aircraft to ground. The aircraft teletype ...