Dual actuator mechanical switch

Details Dual actuator mechanical switch Dual actuator mechanical switch

1993-10-13

1994-12-13

Stephan, Steven L.

Elevator, industrial lift truck, or stationary lift for vehicle

With monitoring, signalling, and indicating means

Monitors operational parameter

200574, 200 6142, B66B 302, H01H 342

Patent

active

053731220

ABSTRACT:
A floor switch mounted on an elevator shaft wall has a housing from which a shaft extends. An arm has one end attached to the shaft and an opposite end attached to a roller. The roller is engaged by a switching vane mounted on an elevator car during up and down travel of the car in the shaft. As the car passes the switch, the vane rotates the arm and the shaft to move a lever which is coupled to actuate switch contacts in the housing. To avoid the engagement of the roller by the vane, a magnetic switch is mounted in the housing and is responsive to a magnet mounted on the car. The magnet mounted on the car passes the magnetic switch shortly before the vane is to engage the roller and the magnetic switch connects a coil in the housing to electrical power. The coil retracts an armature which is coupled to the lever to move the roller out of the path of travel of the vane.

REFERENCES:
patent: 3165600 (1965-01-01), Chasar et al.
patent: 3955649 (1976-05-01), Takenoshita et al.
patent: 4431358 (1984-02-01), Jenkner
patent: 4971178 (1990-11-01), Schauder et al.

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