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Under an arrangement involving the Vonnegut Hardware Company, Prinzler and Dupont, the patents would be assigned to Vonnegut for the manufacture, sale and distribution of what soon would be called the Von Duprin Safe Exit Device. In its first year of production, 1908, Prinzler was selected to supervise the production and assembly of the device.
Carl Jacob Prinzler (June 6, 1870 – May 30, 1949) was an American engineer who invented the "panic bar" device for doors that allowed them to be opened from the inside despite being locked on the outside.
A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar. While originally conceived as a way to prevent crowd crushing in an emergency, crash bars are now used as the primary door opening mechanism in many commercial buildings.
Electric strikes for rim panic exit devices are sometimes, though not always, 'no cut' electric strikes - no cutting, in reference to a rim panic strike, means the strike is bolted to the surface of jamb without cutting into the frame or modifying it in any way (except for the drilling and tapping of mounting screw and/or anchoring pins).
The alarm was patented in 1853 by the Reverend Augustus Russell Pope (1819–1858) of Somerville, Massachusetts. [2] [4] Edwin Holmes acquired Pope's patent rights in 1857 for US$1500 [5] and manufactured the device in his factory in Boston, Massachusetts. He began to sell them in 1858.
In scenarios where a panic password is used to limit access control, instead of triggering an alarm, it is insufficient to have a single panic password. If the adversary knows the system, a common assumption , then they will simply force the user to authenticate twice using different passwords and gain access on at least one of the two attempts.
The on-sale bar is an extraordinarily (some would argue needlessly) complex body of patent law in all but the simplest cases. [1] For instance, licenses are normally not considered a sale, even when a sample product is transferred as part of the license, but a computer software license is considered a barring sale even if the patent claims are ...
The gay panic defense or homosexual advance defense is a victim blaming strategy of legal defense, which refers to a situation in which a heterosexual individual charged with a violent crime against a homosexual (or bisexual) individual claims they lost control and reacted violently because of an unwanted sexual advance that was made upon them.
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