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On August 1, 1966, the Browns submitted a patent application for their invention. Their attorneys were Polacheck and Saulsbury, a New York firm. [1]The invention consisted, at the door, of an electrically controlled lock, several lensed peepholes with covers, a vertically sliding video scanner (camera) and controlling motors, loudspeaker and microphone as well as associated electronics ...
He also had a third device with him, but it did not detonate. Though the bombs did not injure any people, they caused significant damage to the sliding door entrance to the building, shattering several exterior windows, and to the interior area near the desk. [2] The gunman let a woman exit the clinic before lying on his stomach to await arrest ...
Kosmoid Locks was registered in January 1904, as a result of an agreement between Shiels and John Smalley Campbell, an American physician and dentist then resident in London, who like Shiels was a sometime inventor on the side, with over 20 patents registered at the U.S. Patent office, [5] some relevant to dentistry but a significant subset (9 of 22 listed) related to locks.
Keys for some types of warded locks often have a characteristic symmetrical shape. The one on the right is a skeleton key. A warded lock (also called a ward lock) is a type of lock that uses a set of obstructions, or wards, to prevent the lock from opening unless the correct key is inserted. The correct key has notches or slots corresponding to ...
Heavy duty products that place plates on either side the door tied together with screws or bolts can be used to prevent delamination. Door chains — allows the doors to be opened slightly to view outside while still remaining locked. Secondary, internal locks — sliding bolts, hooks and speciality latches, metal blocks or bars mounted internally.
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