What safety-related hardware improvement did Spikes patent alongside the automatic gear shift and turn signal?

Answer

The automatic brake

Richard Spikes maintained a broad focus that extended deeply into vehicle safety features, viewing the automobile as a complete system. Beyond streamlining the shifting process, he recognized the paramount importance of stopping ability. Therefore, one of his other notable and critical patents was for the automatic brake. This, combined with his work on the turn signal, demonstrates a holistic engineering dedication to mitigating common causes of vehicular incidents by embedding safety mechanisms directly into the hardware.

What safety-related hardware improvement did Spikes patent alongside the automatic gear shift and turn signal?
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