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The automatic door used a mat actuator. In 1960, they co-founded Horton Automatics Inc and placed the first commercial automatic sliding door on the market. [5] With the invention of the Gunn diode, microwave motion detectors became common in automatic doors in the 1970s. [6] [7] In 1980, the first automatic door using an infrared sensor was ...
Permanent bollards can be used for traffic-control or guarding against vehicle-ramming attacks. [10] They may be mounted near enough to each other that they block ordinary cars/trucks, for instance, but spaced widely enough to permit special-purpose vehicles, bicycles, and pedestrians to pass through.
A driveway (also called drive in UK English) [1] is a private road for local access to one or a small group of structures owned and maintained by an individual or group. Driveways rarely have traffic lights , but some may if they handle heavy traffic, especially those leading to commercial businesses or parks.
Children should never be allowed near a moving garage door for this reason. On manually operated garage doors, handles should be installed vertically to promote "vertical orientation of the hand". Mechanical garage door openers can pull or push a garage door with enough force to injure or kill people and pets if they become trapped.
The backbone of any electric gate, whether automatic or not, is the electric gate motor, two distinct motor types exist hydraulic, or electromechanical. This is the electric device which actually enables the electric gate to open and close without having to manually push the gate.
In early 1909, the Washington State Legislature appropriated $250,000, placed under the control of the Corps of Engineers, for excavation of the canal between Lake Union and Lake Washington. [7] In June 1910, the US Congress gave its approval for the lock, on the condition that the rest of the canals along the route be paid for locally. [ 7 ]
Bullard Mult-Au-Matic, a vertical, multispindle automatic lathe, 1914. [1] Memorial Day 1942 at Bullard. The Bullard Machine Tool Company was a large American machine tool builder. It specialized in vertical boring mills and was largely responsible for the development of the modern form of that class of machine tools. [2]
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