Joseph Lucas was an old Birmingham England company that got its start making oil lamps for ships, and went on to manufacture lighting systems for bicycles.
They date back to the late 1800s when they made Kerosene and Carbide lamps for bicycles.
See the picture left of a Lucas “Kinglet,” circa 1896.
When these became obsolete Lucas went on to make battery and dynamo (Generator.) driven bicycle lighting systems. (Top picture.)
The company also made generators and other electrical parts for cars and motorcycles.
Lucas also made an inexpensive little mechanical bicycle odometer, called a cyclometer. Introduced, I believe, in the 1930s it was popular with club riders and cycle tourists up until about the 1960s.
It attached to the front wheel spindle and had a five-point star wheel that made contact with a little striker pin attached to a spoke.
Five revolutions of the front wheel would turn the star wheel one revolution. The mechanism was geared so it would measure miles and 10ths of a mile. It was easy to read as you rode just by glancing down to the end of your right fork blade.
You could figure out your speed by looking at your watch; a 4 minute mile was 15 mph. a 3 minute mile was 20 mph. These were never really popular with the racing cyclists as it made an annoying tick-tick-tick sound.
So I abandoned my Cyclometer very early on when I became a serious cyclist, and come to think of it, there were not any other devices to measure mileage or speed until the first electronic ones appeared sometime in the 1980s.
To this day I still don’t use one; I have gone this far without knowing exactly how fast and how far I am riding. A map tells me roughly how far my ride is, and I find that close enough.