Dear Pete,
The NAVAL INSTITUTE PRESS, a publishing company, has or plans to reissue a book from their Anatomy of the Ship series.
The title is "The aircraft carrier INTREPID", by John Roberts.
If you buy, rent, or can check out a copy, then on pages 74 and 75 are drawings (E7)of the bow and stern elevators. They are hydralic, the bow has two repeat two cylinders placed left and right, and the stern elevator has two cylinders placed fore and aft. Page 79, drawing (G3/1 thru G3/3) are drawings of the deck edge elevator. The text for the drawings (G3/1 thru G3/5) are located on page 80. The Naval Institute Press does have a web-site, try that name in/on your search engine, or goto one of your favorite hobby websites and see if they carry the book.