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A drawbar is a defensive implement used to secure a door or gate in a medieval or Early Modern building such as a castle, [1] [2] but also churches and townhouses. When drawn across the full length of the door, it prevents the door or gate from being opened. To open the door or gate, the drawbar is pushed into a drawbar slot in the wall.
A "letter box", or "mail slot" in American and Canadian usage, is a slot, usually horizontal but sometimes vertical, about 30 cm by 5 cm (12 inches by 2 inches), cut through the middle or lower half of a front door. This style is almost universal in British homes and offices, but in the US is limited primarily to urban areas.
An Aldrop is similar, but incorporates a slot through the handle which can engage a hasp for securing the bolt with a lock. Latch bolt – A bolt that has an angled surface that acts as a wedge to push the bolt in while the door is being closed. By the use of a latch bolt, a door can be closed without having to operate the handle.
The Eufy Security SmartDrop Package Delivery Box is available for $400, but a limited-time deal can save you $100. It’s large enough to fit almost any package at 25 x 18.3 x 17.7 inches.
On September 11, 1883, James Goold Cutler received U.S. patent 284,951, for a system connecting deposit boxes on multiple floors to a single ground-floor receptacle; the chute had to have a front of at least three-fourths glass to allow for the identification of mail clogs, and, if installed at a height of greater than two stories, an elastic cushion was to be fitted in the receptacle to ...
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Animation of a lever tumbler lock mechanism. A lever tumbler lock is a type of lock that uses a set of levers to prevent the bolt from moving in the lock. [1] In the simplest form of these, lifting the tumbler above a certain height will allow the bolt to slide past.
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