Passenger Lift Control Equipment

A passenger lift incorporates an electronic safety interlock to prevent all movement of the lift, until a restraining belt is fastened. In some embodiments, the interlock is a normally open electric switch located inside the restraining belt's buckle. The switch is closed and the movement of the lift actuated only when the restraining belt's matingly interlocking tab is inserted in the buckle.

A passenger lift incorporates an electric safety interlock in a restraining belt. The passenger lift has a mobile platform that is driven to transport passengers between different terminal levels and a drive means for actuating the platform between the different levels. The mobile platform defines a lift surface with a front edge and two opposing sides. Spaced apart side passenger supports are disposed over the lift surface, above at least a portion of each of the opposing sides. The restraining belt is formed by a buckle attached to one of the side supports, and a strap attached to the opposed side support and terminating in a tab which matingly interlocks with the buckle. The buckle and the strap are fixed along the side passenger supports, so that when the buckle is matingly interlocked with the tab, the strap extends across the platform and forms a safety restraint between a passenger on the platform and the front edge of the platform. Intercom facilities along with telephones and alarms are provided in order to alert the authorities in the face of an unforeseen crisis, mishaps and emergency. Safety is a major concern in escalator design. Fire protection of an escalator floor opening may be provided by adding automatic sprinklers or fireproof shutters to the opening, or by installing the escalator in an enclosed fire-protected hall. To limit the danger of overheating, adequate ventilation for the spaces that contain the motors and gears must be provided.

Key features developed for convenience- anti slide devices: raised circular objects that often stud the escalator balustrade. Sometimes informally called "hockey pucks" due to their appearance, their purpose is to prevent objects (and people) from precipitously sliding down the otherwise smooth metallic surface. Comb plate impact switches: stop the escalator if a foreign object gets caught between the steps and the comb plate on either end. Emergency stop button: at each end of the escalator (in some models, also on the balustrade), a large red button can be pressed to stop the device in the event of an emergency. Typically, an alarmed transparent plastic guard plate covers the button; restarting requires turning a key. Safety instructions: a sign, typically posted on both escalator newels at the entrance landing platform. In some situations, safety precautions are posted on walls near the escalator, included on freestanding signs, or-as in some models-printed on the riser surface itself.

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