Beehive coke ovens were called that because they were built in a beehive-like hemispherical shape, and then covered with earth. Cross section of a Hand-drawn Beehive Coke Oven. The Beehive Ovens were built in banks of ovens, called a battery, with a strong retaining wall in front, and then covered with earth.
One such technique is called âbumping.â Lock bumping, also referred to as key bumping is an attack technique using specially cut keys, known as bump keys, that can defeat conventional pin and tumbler door locks.
1 How to Unlock Your Car Door with a Shoelace in 10 Seconds. 2  How to Break into Locks with Beer Can Shims, Bump Keys, & Just Plain Brute Force. 3  Digital Lock-Picking: This Simple Arduino Hack Opens Millions of Hotel Keycard Doors. 4  Oops: Some Security Doors Can Be Picked with Canned Air.ouse Door Method #1: Use a Bump Key. Bump keys are specially crafted keys that are used to unlock pin based locking systems, which are used on the vast majority of homes. Most pin systems are spring-loaded and the ridges of the keys press against the corresponding pins, which then unlock the lock.