Published Resources Details Letters Patent
- War vessel
- United States Patent Office, 4539
Specification forming part of Letters Patent No. 1,028,472. Application filed March 8 1907.
"The object of the invention is mainly to provide a more rapid and efficient means than heretofore for the immersion and emergence of war vessels. Heretofore, water has been taken aboard by opening sea valves in the bottom or sides of the boat to let the water flow in by gravity for its immersion, and to remove this water, it has been necessary to resort to the slow process of pumping out the compartments. This slow pumping-out process had many disadvantages…"