Seeking reference material on IJN Catapult systems

[cliftonra]

I have been unable to find any serious reference material describing the different types of IJN Catapults or even how they functioned. I am specifically looking for information on the Type 4 system, though it would be great if there were a true reference on all of the different types. I don't mind tracking books down but I am unaware if such a book (or even a serious article) even exists. If anyone can point me in the right general direction, it would be greatly appreciated.
My interest in the Type 4 system is because it was used as a basis to create a mechanically launched bridge systemin the late 30's.
Thank you in advance for any assistance!
Robert A. Clifton, R.A.

[Dan K]

Lacroix and Wells Japanese Cruisers of the Pacific War covers IJN catapults in one of its appendices.

If time allows, I will try to review some info.

the Type 4 system is because it was used as a basis to create a mechanically launched bridge system in the late 30's.

I'm not sure I know what you are referring to. Is there a particular ship, or ships, that mounted this version?

[cliftonra]

As usual, thank you Dan for your insights. You always point me in the correct direction!
I have the book, I just need to track it down!
Bob