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Chamberlain, LiftMaster, and Craftsman have interchangeable parts, primarily the gear and circuit boards. The greatest difference between the brands is that Chamberlain and Craftsman operate on a square shaped split-rail system, while LiftMaster consists of one single solid piece of inverted t-shaped rail.
The majority of the operators open the door directly or through an arm. Overhead concealed mount—the operator is mounted above the door and rotates the door directly, through its pivot. Surface mount, push (scissor arm)—the operator is mounted on the wall above the door, on the approach side and pushes the door with a linkage of 2 arms.
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.
In May 1954, the Alliance Manufacturing Company first produced its own garage door opener and called it Genie. [2] In 1983 the company entered the home and shop vacuum market, and in 1985 it changed its name to Genie Home Products. [2] Overhead Door Corporation purchased the company in 1994. [2] The Genie Company is headquartered in Mt. Hope ...
Macintosh Programmer's Workshop (MPW) is a software development environment for the Classic Mac OS operating system, written by Apple Computer.For Macintosh developers, it was one of the primary tools for building applications for System 7.x and Mac OS 8.x and 9.x.
X/Open group (also known as the Open Group for Unix Systems [1] [2] and incorporated in 1987 as X/Open Company, Ltd. [3] [4]) was a consortium founded by several European UNIX systems manufacturers in 1984 [3] [5] to identify and promote open standards in the field of information technology.
Instruction ROM is 24 bits wide. Software can access ROM in 16-bit words, where even words hold the least significant 16 bits of each instruction, and odd words hold the most significant 8 bits. The high half of odd words reads as zero. The program counter is 23 bits wide, but the least significant bit is always 0, so there are 22 modifiable bits.
Wall-mounted bottle opener with magnet to catch lids. Works the same as the lever variation, except that it is attached to the wall, to allow for simpler bottle-opening, which can be done with one hand. The bottle cap can fall into a bottle cap catcher mounted below the opener, or it can be retrieved after removal from the bottle.