I infer from Andy's description that the use of two separate switches is so that they can be positioned to trigger at two different times. One is positioned to activate a "low paper" warning light, but the machine would be allowed to continue running for a time after that. Then if the Teletype machine's human servant doesn't replace the paper roll in time, and it runs further down - dangerously low - the second switch would cut off the TTY machine power altogether to prevent running out and typing directly on the platen.
- Stan V
WB7RPG
Hood River, OR
Instead of two switches, just use a relay to switch both.
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