classic motorcycle forum

Hi, I'm new to the forum and I'm afraid here under false pretences but having failed to get any info elsewhere I hope that the knowledge base for old British bikes may help me. I don't own a bike but have a lovely bit of British engineering, a 1934 Dennis lawnmower with a 500cc single fed by a carb that has Binks on the hex in the centre of float chamber lid and Amalgamated Engineering etc around the circumference.
Amal I know but what is the association with Binks  and are any parts still available?
Any info will be gratefully received.
Angus