Audichron

It made announcements such as: "Save by the 10th, earn from the first, at Central Brevard National Bank.

The drum on the left side of the machine was the widest; it held the customers' messages.

STMs were typically used in small towns with fairly low traffic volume.

A thermometer was placed on top of the telephone company central office and connected to the Audichron temperature machine.

This would cause the leadscrew to rotate and position the soundhead on top of the correct temperature recording.

Thus with a time and temperature machine, a caller might hear: "Save by the 10th, earn from the first, at Central Brevard National Bank.

The comparator units used an oscilloscope to monitor the National Bureau of Standards radio station WWV to ensure the time was accurate.