In a double acting lever lock, the key may additionally push against a spring-loaded lever which holds the sliding bolt in place.
The ship was propelled by a 4-stroke Single Cycle double Acting diesel engine, which had 12 cylinders of diameter by 16 ( 42 cm ) stroke.
One of the simplest forms of a double acting machine, the Franchot engine consists of two pistons and two cylinders and acts like two separate alpha machines.
In addition, the company is responsible for a number of recent advances in the design of icegoing ships, such as the double acting ship and oblique icebreaker concepts.
Thus, the plunger stage only of the telescopic actuator is equipped as a double acting cylinder to provide the initial force to pull the mast back from vertical.
After almost a decade of successful operation without icebreaker assistance " Tempera " and " Mastera " remain the only double acting tankers operating in the Baltic Sea.