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On an undetermined date in the summer of 2023, a Boston police officer slid down the slide and was filmed emerging from the end of the slide at high speed. He sustained a minor head injury and was treated by Boston Emergency Medical Services using his own medical insurance. He did not miss work time nor face any disciplinary action. [5] [9]
Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or bearing, or the swing type that draws the gate open or closed on hinges. They are usually operated by a remote controller or a sensor
In 1954, Dee Horton and Lew Hewitt invented the first sliding automatic door. 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.
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Emergency responders along an icy Interstate 94 in Comstock Township, Michigan, ran for their lives Thursday morning when a box truck driver lost control, skidded along the slippery highway and ...
The operator is placed in the space above the sliding door. An electric motor, geared down to get a lower speed and a higher torque, drives a pulley at one end of a belt. The door is clamped to the belt. To open the door, the motor turns the pulley, which in turn turns the belt, which in turn drags the door.