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Heart locks had two prominent characteristics: one was a spring-loaded cover that pivoted over the keyhole to keep dirt and insects out of the lock that was called a "drop". The other was a point formed at the bottom of the lock so a chain could be attached to the lock body to prevent the lock from getting lost or stolen.
A puzzle lock or puzzle padlock is a type of mechanical puzzle. It consists of a lock with unusual or hidden mechanics. Puzzle locks are reconfigurable mechanisms where the topological structure changes during the operation. [1] Such locks are sometimes called trick locks, because there is a trick to opening them which needs to be found. Puzzle ...
A square, rounded or V-shaped depression, filed or machined into a key, to allow the key to turn in its lock. 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 ...
The normal key on the left will open only the lock that it goes to, but the skeleton key on the right will open any lock with this particular keyhole. Two warded lock keys and a homemade skeleton key A skeleton key (also known as a passkey [ 1 ] ) is a type of master key in which the serrated edge has been removed in such a way that it can open ...
The key design is a U-shape profile with six cuts on each side of the key, along with a central roller to activate the trigger pin in the front and center of the cylinder. [ 1 ] In order for the lock to operate, the key must be fully inserted, allowing the dual sidebars to enter the pins, provided the pins were raised to the correct height ...
The lock company, Slaymaker, Barry and Company, was founded in 1888 by Samuel R. Slaymaker and John F. Barry of Connellsville, Pennsylvania.Samuel Slaymaker had become interested in switch and signal locks while working for the Pennsylvania Railroad as a civil engineer.
A love lock or love padlock is a padlock that couples lock to a bridge, fence, gate, monument, or similar public fixture to symbolize their love. [2] Typically the sweethearts' names or initials, and perhaps the date, are inscribed on the padlock, and its key is thrown away (often into a nearby river) to symbolize unbreakable love.
The lock is not visibly damaged, although the force of the bump can leave an indentation on the front of the cylinder. Certain clicking and vibrating tools designed for bumping can also be used. These allow for rapid repetition of bumping. Though some locks have advertised "bump proof" features, only a rare few key-pin locks cannot be bumped.