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FIRE ALARM SYSTEMS
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A door panel position control mechanism for a multiple panel horizontal sliding door assembly of a freight elevator landing.
A door panel position control mechanism for a multiple panel horizontal sliding door assembly of a freight elevator landing. The mechanism comprises a multiple node scissors linkage that is configured to be easily installed and initially adjusted and which has its parts symmetrically balanced about a vertical plane such that excessive eccentric loading on the components is reduced and a long service life is obtained with reduced wear and a reduced need for periodic adjustment.
Hazardous machines and systems are frequently equipped with safety elements (safety doors) with a locking mechanism to protect the operator.
Their function is:
To prevent hazardous machine functions if the safety door is not closed and locked,
To keep the safety door closed and locked until the risk of injury has passed.