I remember when Ford starting putting auto chokes in the Cortina and Escort that worked by the temperature of the cooling water so cold, choke opened, hot closed.
Trouble was if the car stalled on a cold Winters morning before fully warming up they would be a pain to restart without flooding the carb easily fixed by buying a manual adaptor that came with the dash lever, cable and a piece that fixed onto the automatic adjuster on the coolant thermostat housing.