BSA Norman air pistol Patent no. 12,692 (1911) 

With thanks to Prof John Griffiths for these scans.

At the end there is a commentary on this patent by (I think) Dennis Commins, courtesy of Peter from vintageairguns.co.uk

BSA Norman air pistol Patent no. 5,283 (1912) 

With thanks once again to Prof John Griffiths for these scans.

At the end there is a commentary on this patent by (I think) Dennis Commins, courtesy of Peter from vintageairguns.co.uk

BSA side lever latch Patent 25783 (1910) 

With thanks for this scan to Peter at vintageairguns.co.uk

BSA double sear safety Patent no. 30338 (1910) 

Thanks to Peter from vintageairguns.co.uk for this scan.

BSA two-stroke lever cocking rifle Patent (1913 ) 

With thanks to Peter from vintageairguns.co.uk for supplying this scan.

See also http://www.network54.com/Forum/670443/message/1286565548 for pics of the rifle.

BSA shotgun-style safety catch Patent (1914) 

With thanks to Peter from vintageairguns.co.uk for supplying this scan.

BSA push barrel rifle Patent no. 1988 (1914) 

With thanks for the patent details to Peter from vintageairguns.co.uk.

The article that follows, describing a prototype push-in barrel BSA (though not built exactly to the patent specs) is by Harvey from Airgun World, Vol 2, issue 5, December 1978, with photos by John Priest.

These pics apparently of the same gun. With thanks to John.

BSA Patent piston head securing washer (1929) 

With thanks for the patent details to Peter from vintageairguns.co.uk.

This was the final BSA pre-WW2 patent application and dealt with the problem of the usual screw securing the leather piston cupped seal being damaged or coming loose.

Joseph H Cox Patent rotary mag repeater (1909) 

BSA Patent piston head securing washer (1929) (full patent) 

Scans from Lakey of the original patent.

Thanks also to Peter from vintageairguns.co.uk for Dennis Commins's research on this patent, which appears after the scans of the original.

This was the final BSA pre-WW2 patent application and dealt with the problem of the usual screw securing the leather piston cupped seal being damaged or coming loose.

Lincoln Jeffries alternative breech patents 

These patents date from 1905 and 1904. The first one was apparently fitted to a prototype Lincoln Jeffries.

Lincoln Jeffries Foresight Protector Patent 

From 1904.....Seems a very long winded explanation, but I suppose this is how the agents made their living...

Drawing;

Lincoln Jeffries pellet resizer 

With thanks to Simon for tracking this down.