Otis Elevator Company

Helmut Schr&ouml;der-Brumloop

Richard N Fargo

Gerard Sirigu

Barry G Blackaby

Joseph J Barna

Richard J Ericson

Pascal Rebillard

Armando Servia

Gurumurthi Ravishankar

Randy G Henley

Jean Marc Ferrary

Chris Pietrzykowski

An elevator rescue system includes a power source of back-up electrical power. A manually-operated, rescue enable switch switchably permits the transmission of electrical power from the power source to a motor brake coil of an elevator car during a rescue operation such that the energized coil releases the motor brake to move the car to a desired landing. A speed detector measures the speed of the elevator car and thereupon generates a speed control signal corresponding to the speed of the car. An overspeed detection circuit has a first input for being actuated when receiving electrical power from the power source, a second input for receiving the speed control signal, and an output for transmitting electrical power to the motor brake coil when the speed control signal is below a predetermined value and for automatically stopping the transmission of electrical power when the speed control signal becomes higher than a predetermined value. A manually-operated brake release switch has an input and an output. The input is coupled to the output of the overspeed detection circuit, and the output is to be coupled to the motor brake coil of the elevator car for transmitting electrical power to release the motor brake when the brake release switch is closed.

Elevator rescue system

An elevator system includes a counterweight-drive assembly (,) having a motor (,) and drive pulley (,) mounted internally to engage a drive belt (,) for climbing or descending with respect thereto, resulting in raising or lowering of an elevator car (,) coupled to said counterweight-drive assembly (,).

Belt-climbing elevator having drive in counterweight

An elevator overspeed system designed to work as a governor includes a first switch responsive to an overspeed condition and a second, remotely located switch responsive to said first switch. An overspeed elevator control procedure is initiated when one of the first or second switches are tripped. The first switch is automatically re-set after the second switch is tripped. The second switch is manually re-set to re-start the elevator system in normal operation mode.

Remote storage and reset of elevator overspeed switch

Growing community of inventors

Berlin, Germany

Helmut Schröder-Brumloop

Growing community of inventors

Berlin, Germany

Helmut Schr&ouml;der-Brumloop

Helmut Schröder-Brumloop