Bottle opener capacity. A specific style of bottle opener is known as a churchkey. Invented at the same time as the crown cork, it is the original bottle opener. But as well as being portable it also comes as a fixed device to be attached to vertical surfaces, often with a tray to catch the bottle tops. It does not open wine bottles. It is class 2 fulcrum type. A simple opener is a piece of metal with a rectangular or rounded opening in one end and a solid handle large enough to be gripped between the thumb and forefingers on the
Garage door opener in 1993; such a system can use an electric eye, a door edge sensor, or any other device that provides equivalent protection by reversing the travel of the closing door if an object is detected in its path. Garage door opener A garage door opener is a motorized device that opens and closes garage doors controlled by switches on the garage wall. Most also include a handheld radio remote control carried by the owner, which can be used to open and close the door from a short distance. The electric overhead garage door opener was invented by C.G. Johnson in