Some bike-related technologies are now seen as antiquated but a lot of us used them when were were growing up. A few for starters from me:
"Bar brakes" on my first bike - steel rods and cams connected to the brake levers - they lifted the brake pads against the wheels
A mileometer attached to the front fork and activated by a steel pin attached to a spoke
A smelly rain cape made of oiled cotton
How about you guys - did anyone out there use a carbide lamp when they were still in common use?