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A tubular lock and key. A tubular pin tumbler lock, also known as a circle pin tumbler lock, radial lock, or the trademark Ace lock popularized by manufacturer Chicago Lock Company since 1933, is a variety of pin tumbler lock in which a number of pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape.
The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.
Screenshot of the Syskey utility on the Windows 8.1 operating system requesting the user to enter a password.. The SAM Lock Tool, better known as Syskey (the name of its executable file), is a discontinued component of Windows NT that encrypts the Security Account Manager (SAM) database using a 128-bit RC4 encryption key.
The Integrated Helmet and Display Sight System (IHADSS) 30 mm M230 chain gun turret on a Boeing AH-64 Apache being aimed with a helmet-mounted sight A helmet-mounted display (HMD) is a headworn device that uses displays and optics to project imagery and/or symbology to the eyes.
Lock bumping is a trend in burglaries, [10] [11] as the technique can make it easy and fast to break into homes without needing too much special equipment or leaving any trace of forced entry. It works almost as well as having a key, [ 12 ] [ 13 ] and a set of ten rapping keys can make the criminals capable of opening 90% of common tumbler locks.
The OR-201 helmet was developed in the early 1970s by the Israeli private firm Orlite Engineering Company (now Orlite Industries Ltd) of Ness Ziona near Tel-Aviv, and is the direct result of experience acquired with the steel types – the British Brodie helmet Mark II/Mark III, RAC Mk II modified helmet with chin web jump harness (used by paratroopers and similar to the HSAT Mk II/Mk III ...
As a result, the mass of the helmet is increased to 2 kg. This helmet is designed for the personnel of the Russian armed forces. The helmet protects the head in class 1 (9×18mm Makarov pistol and revolver bullets), as well as from fragments of steel of spherical mass of 1.1 g (6.3 mm diameter of fragment) up to 400 m/s. [10]
The usual meaning of diving helmet is a piece of diving equipment that encases the user's head and delivers breathing gas to the diver, but the term "diving helmet", or "cave diving helmet" may also refer to a safety helmet like a climbing helmet or caving helmet that covers the top and back of the head, but is not sealed.