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The Schmid peoplemover (German: Schmid-Peoplemover) is an elevator capable of crossing an obstacle (a road, a railway, a river, etc.). It was invented by Emil Schmid [1] and designed by the company Schmid-Maschinenbau from Sonnenbühl, Germany. [2]
The device usually acts as the interface of a sensor (such as a light curtain), designed to signal a safety-related event, typically when the light curtain beam's being "broken". OSSD signals are the outputs from the protective device (light curtain or scanner) to a safety relay .
Isolation valves, and control valves, that are used for example in systems containing hazardous substances, can be designed to close upon loss of power, for example by spring force. This is known as fail-closed upon loss of power. An elevator has brakes that are held off brake pads by the tension of the elevator cable. If the cable breaks ...
The next elevator to be dispatched usually has its hall lantern or a "this car leaving next" sign illuminated to encourage passengers to make maximum use of the available elevator system capacity. Some elevator banks are programmed so that at least one car will always return to the lobby floor and park whenever it becomes free.
The digital capacitive technology is based on a non-contacting ceramic sensor mounted inside the load cell body. As the load cell contains no moving parts and the ceramic sensor is not in contact with the load cell body, the load cell tolerates very high overloads (up to 1000%), sideloads, torsion, and stray welding voltages. [3]
Below is an example of what a trapped key interlock transfer block would look like. This is a part of a trapped key interlocking system. In order to obtain the keys in this system, a key must be inserted and turned (like the key at the bottom of the system of the picture).
A destination dispatch elevator, here using a Compass system from Otis.. Destination dispatch is an optimization technique used for multi-elevator installations, in which groups of passengers heading to the same destinations use the same elevators, thereby reducing waiting and travel times.
In engineering and systems theory, redundancy is the intentional duplication of critical components or functions of a system with the goal of increasing reliability of the system, usually in the form of a backup or fail-safe, or to improve actual system performance, such as in the case of GNSS receivers, or multi-threaded computer processing.