The electromechanical relay, used as a constructive part of some early calculators and computers (see computers of Zuse, Aiken, and Stibitz), was invented in 1835 by the brilliant US scientist ...

When relay R closes its switch ... a fully acceptable modern compromise. This next electromechanical circuit is a variation of the previous one and was used by Alexander Stepanovich Popov ...

"Through our own investigation, we have traced the cause of Sunday's outage to an electrical relay device," Rice told city ...