LEO III Emergency Stop Button

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Emergency stop button from a LEO III computer that allowed the user to switch off the entire LEO III if some electrical or other crisis occurred. It was located on the operator console. All jobs running on the computer would be lost if the button was pressed.

This example in our collection originated from a LEO III used at BOC (either LEO III/13 or 18), and was gifted to the donor following the retirement of the computer.

Manufacturer: LEO
Date: 1964



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Other Systems Related To LEO III Emergency Stop Button:

Item Manufacturer Date
74371 Circuit board from a LEO IIIs. LEO Computers Ltd Undated
54363 Mercury delay line tube, short LEO c1950s
Leo III Logic Board LEO Computers LTD early 1960s
Leo III Board LEO Computers LTD 1961
Leo III Digital Clock LEO Computers LTD 1961
Short Mercury Delay-Line LEO Computers LTD 1962
55625 Program Wiring Subset Unit from LEO III LEO Computers Ltd c1965

This exhibit has a reference ID of CH76574. Please quote this reference ID in any communication with the Centre for Computing History.

  

LEO III Emergency Stop Button


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