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A two-winged wheel on a Deutsche Bahn (German railways) building in Dresden. A winged wheel or flying wheel is a symbol used on monuments by the ancient Greeks and Romans and more recently as a heraldic charge. The symbol is mostly formed with one or two wheels and one, two, or three wings—with one wheel and two wings being the most common form.
The God on the Winged Wheel coin, referred to in Levantine numismatics as the British Museum drachma, is a 4th-century BCE silver coin attributed by scholars to the Gaza mint, with a deity seated on a winged wheel.
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.
In pin tumbler locks, the series of key cuts on a key causes the pins to line up at the shear line or gate so the lock will open. In warded locks, the key cuts bypass the wards so the key can push or pull the bolt. [6] Key pin In a pin tumbler lock, the key pin is in contact with the key. It has varying lengths, corresponding to the key's ...
It usually has a trigger that creates a movement which (like bump keys) transfers sudden energy to the key pins, which communicate this to the driver pins, causing only those pins to jump, allowing the cylinder to turn freely for a brief moment, until the pin springs return the pins to their locking position. Electric versions are also common ...
For example, a standard 6 pin cylinder, which was designed to be operated by only one key, can be operated by up to 2 6 = 64 keys if there are two shear points in each chamber. Larger organizations, with more complex systems, may have several levels of master keys, where the top level key works in all of the locks in the system.