SKB is right. The Baker coil sprung ejectors. They were generally used on guns of lesser quality but I have just started work on a 1927 pair of Greener 16b FH50's and they use the Baker ejectors.
Totaly reliable until they're not, if you get my meaning! However very simple mechanism and easy to regulate if a little agricultural.
One thing to understand in that they really, really didn't understand the design parameters of coil springs, most C19th coil springs are poorly specified and quite liable to breakage or settling.
I will always remember trying to order some coil springs from a very experienced spring manufacturer for a Holland & Robinson ejector system. His simple comment 'they won't last long' confirmed by my observations before and since!
