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The Schlage Manufacturing Company was founded by inventor Walter Schlage (d. 1946) in 1920 with the help of three businessmen who each contributed $10 to become equal partners. [3] Walter Schlage had already secured several patents dating back to 1909, when he patented a doorknob that would also complete an electrical circuit so that, for ...
Each tenant is given a key that only unlocks their own door, called the change key, but the second key is the master key, which unlocks all the doors, and is usually kept by the building manager, so they can enter any room in the building. In a master-keyed lock, some or all of the pin chambers in the lock have three pins in them instead of two.
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The Schlage Lock Company was incorporated with a starting capital of $30. [7] In the same year, he applied for a patent for a lock that could be drilled into a door with only two holes. [ 3 ] [ 8 ] This new cylindrical lock had a single plate, serving as both escutcheon and striker plate, wrapping around the door's edge.
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency carrier wave.The modulation is accomplished by varying the sine and cosine inputs at a precise time.
Rear side of 3.5-inch floppy drive. Berg connector for power is shown on the left; data cable on right. Berg connector is a brand of electrical connector used in computer hardware. Berg connectors are manufactured by Berg Electronics Corporation of St. Louis, Missouri, now part of Amphenol.
The key prevents relative rotation between the two parts and may enable torque transmission. For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in which the key fits. The whole system is called a keyed joint. [1] [2] A keyed joint may allow relative axial movement between ...
Microsoft released Service Pack 1 for Visual Studio 2005 on December 14, 2006. [131] An additional update for Service Pack 1 that offers Windows Vista compatibility was made available on June 3, 2007. [132] Visual Studio 2005 was upgraded to support all the new features introduced in .NET Framework 2.0, including generics and ASP.NET 2.0.
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