page_title: Audichron
section_title: STM
hierarchical_section_title: Audichron / Types / STM
caption_attribution_description: English: Photo of 1972 Audichron STM-100-T Time and Temp Machine
context_page_description: Audichron was a talking clock, or a time announcer which was developed and produced by the Audichron Company, starting in the 1930s. There were several types of Audichron machines including the stand time piece, M12, temperature machine and the Comparator.
context_section_description: STM stood for "Small Town Machine".
   This was the standard time piece. It made announcements such as: "Save by the 10th, earn from the first, at Central Brevard National Bank. Time one forty two." The STM had three recording drums and two sound heads. The drum on the left side of the machine was the widest; it held the customers' messages. On the right side of the machine were the hour drum and the minute drum. The hour drum was the narrowest of the three drums; it simply had the hours 1 through 12 recorded on it. The minute drum had the minutes 1 through 59 and o'clock recorded on it.
  Inside the STM were a series of gears that caused the drums to rotate and index independently to new messages (there were up to twenty four messages on a drum, twelve each in two groups), new hours and new minutes. There was a sound head on each side of the machine. The first would come down and play the message. Then it would be raised and the other sound head would drop down to play the hours and minutes. STMs were typically used in small towns with fairly low traffic volume.
caption: Audichron STM100-T
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