The Quadrant Cycle Company was a company in Birmingham, England that was established in 1890 as a bicycle manufacturer. They advanced to make motorcycles from 1899 until their demise in 1928. They also made a tricar called Carette in 1899 and a small number of cars for about two years around 1906.
The company exhibited a car chassis with a four-speed Lloyd gearbox of the style known as "crossed rollers"; this allowed direct drive at all speeds. The used 14/16 or 20/22 hp engines made by White and Poppe.
David Burgess Wise, The New Illustrated Encyclopedia of Automobiles.
Made in Birmingham, The Birmingham Motorcycle Industry