HUGE CAMERA READS METERS TO COUNT TELEPHONE CALLS (Jul, 1937)
HUGE CAMERA READS METERS TO COUNT TELEPHONE CALLS
Special cameras of new design are taking the place of human meter readers who check and record, each month, the number of telephone calls for which you are to be billed. In the larger cities, a single telephone central office may employ as many as 10,000 individual registers or meters, and teams of clerks have been required to read them. Photographing twenty-five meters at a time, the cameras give a quicker reading and one that is proof against error.