News and journalism

How the Dictaphone Entered Office Life

Allison Marsh, IEEE Spectrum, 2026

Read on October 16, 2026

What it is: A history column by a University of South Carolina historian of technology tracing dictation machines from Edison's phonograph and Bell and Tainter's Graphophone through the Dictaphone, the Dictabelt and cassette tape, drawing on David Morton's history of recording, Off the Record.
How much weight it carries: Written by an academic historian for the IEEE's general magazine and based on published scholarship. It is a secondary source: dates are reliable, while market estimates are quoted from company figures of the time.

Facts taken from this source

Dictaphone introduced the plastic Dictabelt to the public in 1947, and each belt held about 15 minutes of recording.
“In 1947, the company publicly introduced the new technology with its Time-Master series. Each Dictabelt held about 15 minutes of recording.” (Main text)
By 1945, Dictaphone estimated that it had captured only 15 to 25 percent of its potential market.
“by 1945, Dictaphone estimated that only 15 to 25 percent of the potential market had been captured.” (Main text)
Dictaphone adopted magnetic tape, in the form of cassettes, in the 1960s.
“In the 1960s, Dictaphone finally embraced magnetic recording tape, in the form of cassette tapes.” (Main text)
From the earliest dictation machines, typists transcribed recordings on playback machines with foot pedals that controlled speed and let them reverse and repeat.
“Typists used playback machines with foot pedals to control the speed of the recording and to reverse and repeat as necessary.” (Main text)

News and journalism

Allison Marsh, IEEE Spectrum, 2026

Read on October 16, 2026

What it is: A history column by a University of South Carolina historian of technology tracing dictation machines from Edison's phonograph and Bell and Tainter's Graphophone through the Dictaphone, the Dictabelt and cassette tape, drawing on David Morton's history of recording, Off the Record.
How much weight it carries: Written by an academic historian for the IEEE's general magazine and based on published scholarship. It is a secondary source: dates are reliable, while market estimates are quoted from company figures of the time.

Dictaphone introduced the plastic Dictabelt to the public in 1947, and each belt held about 15 minutes of recording.
“In 1947, the company publicly introduced the new technology with its Time-Master series. Each Dictabelt held about 15 minutes of recording.” (Main text)
By 1945, Dictaphone estimated that it had captured only 15 to 25 percent of its potential market.
“by 1945, Dictaphone estimated that only 15 to 25 percent of the potential market had been captured.” (Main text)
Dictaphone adopted magnetic tape, in the form of cassettes, in the 1960s.
“In the 1960s, Dictaphone finally embraced magnetic recording tape, in the form of cassette tapes.” (Main text)
From the earliest dictation machines, typists transcribed recordings on playback machines with foot pedals that controlled speed and let them reverse and repeat.
“Typists used playback machines with foot pedals to control the speed of the recording and to reverse and repeat as necessary.” (Main text)