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Again, the term refers to the lock mechanism, so a lock can be both a mortise lock and a lever tumbler lock. In the modern lever tumbler lock, the key moves a series of levers that allow the bolt to move in the door. [5] Pin tumbler lock, commonly used for mortise locks in the US. The next major innovation to mortise lock mechanisms came in 1865.
The pick is then used to lift each lever inside the lock to the correct height so that the locking bolt can pass. Higher security lever locks (such as the five-lever) usually have notches cut into the levers. These catch the locking bolt and prevent it from moving if picking is attempted (similar to the security pins in a pin tumbler lock).
A Chubb detector lock is a lever tumbler lock with an integral security feature, a re-locking device, which frustrates unauthorised access attempts and indicates to the lock's owner that it has been interfered with. When someone tries to pick the lock or to open it using the wrong key, the lock is designed to jam in a locked state until ...
The OTO 127/64 LW (light-weight) Gun assembly is a rapid-fire gun mount suitable for installation on large and medium size ships. It also has a version for coastal defense, intended for surface fire and naval gunfire support as main role and anti-aircraft fire as secondary role.
A gun carriage is a frame or a mount that supports the gun barrel of an artillery piece, allowing it to be maneuvered and fired. These platforms often had wheels so that the artillery pieces could be moved more easily. [1] Gun carriages are also used on ships to facilitate the movement and aiming of large cannons and guns. [2]
Development began in 1864 to replace the RBL 6-pounder 2.5-inch (64 mm) gun of 3 long hundredweight (340 lb; 150 kg), which had proved too heavy for a mountain gun. . Several Mks of 7-pounder RML of 2 long hundredweight (220 lb; 100 kg) were tried in 1865 by boring out and rifling old SBML bronze guns, but were still too
Each individual gun weighed 142,492 lb (64,633 kg) with the breech and measured 53 ft 6.5 in (16.32 m) in length. [3] Each of the original Mark 1 built-up guns consisted of a tube without liner, jacket, eight hoops and a screw box liner. To compensate for the problem of gun drooping, four hoop-locking rings were added to the guns.
This gun was based on the cast-iron barrel of the Millar Pattern 8-inch 65 cwt gun, originally designed in 1834. [3] This was designed to fire a smooth bore spherical shell weighing 50 lb (23 kg). The 8 in (20 cm) gun was bored out to 10.5 in (27 cm) and a new built-up wrought iron inner tube with inner diameter of 6.29 in (16.0 cm) was ...