Many years ago, there was a manufacture that built a very high quality switch machine, using a DC motor, rack and pinion gear movement,
with two direct SPDT superior mechanical switches. This manufacture could not compete against the cheaper quality built Tortoise switch machine.
In a few circumstances, I had to totally disassemble a Tortoise switch machine.
I had to remount a copper wiper plate, with two wipers to the internal swing arm.
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