Advantages of sleeve valves for H-24 engines?

[c1951]

The sleeve valves were based n the Burt McCollom patents before 1914 that were used in Argyle cars, nothing new in the concept.

 

[Simon Thomas]

Burt patent:

https://worldwide.espacenet.com/patent/search/family/032444869/publication/GB190918140A?q=pn%3DGB190918140A

McCollum patent:

https://worldwide.espacenet.com/patent/search/family/045240249/publication/CA120525A?q=pn%3DCA120525A

 

[c1951]

Burt patent:

https://worldwide.espacenet.com/patent/search/family/032444869/publication/GB190918140A?q=pn%3DGB190918140A

McCollum patent:

https://worldwide.espacenet.com/patent/search/family/045240249/publication/CA120525A?q=pn%3DCA120525A

Yes, the originals which I've seen are in the University of Glasgow Archives-thanks for posting