John W. Koshak is head and founder of Elevator Safety Solutions, Inc., and a member of Elevator World, Inc.’s Board of Directors and Technical Advisory Group. He is also current president of the International Association of Elevator Consultants. Directly prior to reactivating his company in September 2008, Koshak served as director of Codes and Standards for North America for thyssenkrupp Elevator. He was formerly in research at thyssenkrupp Research, Innovation and Design. Koshak got his start in the industry in 1980 at Westinghouse Elevator Co. and has worked for Dover Elevator, Amtech Elevator and Adams Elevator Equipment Co., where he was vice president of Technical Support. He was a National Elevator Industry Educational Program instructor from 1982 to 1991, designed the LifeJacket hydraulic-elevator safety and holds several patents for elevator-component designs. Koshak is a member of the ASME A17 Standards Committee and a past chairman of the Elevator Escalator Safety Foundation.
Conclusion of series examines components used in electric elevator systems that provide safe traction. In Part 1 (ELEVATOR WORLD, August 2017), we learned the design basics of traction, starting with friction up to how a designer establishes the required traction and then uses angle of wrap and groove design to ensure there is always adequate…Read More
Unintended loss of traction, resulting from component deterioration, for example, is very hazardous and can allow an elevator to move uncontrolled. Four factors determine and control traction: The traction ratio of car and counterweight The area of contact of hoist ropes on the drive sheave The coefficient of friction/friction factor between the hoist ropes and…Read More
Learn about the MCP and updates made to it since 2010. In the world of elevators, manufacturers design newer components to require less maintenance. Replacing an older elevator controller, full of heat-generating relays, with a solid-state elevator controller with electronic components, devices, software and functions should reduce the maintenance time but not eliminate maintenance altogether.…Read More
Maladjustment of elevator door controllers can cause injury to persons if impacted by a closing door with a high speed. Persons can also be entrapped or crushed by a door system with too much door closing force. Education and vigilance when performing elevator door adjustment and maintenance is critical for safety. Door-related incidents are estimated…Read More
Progress made on new global standard at Elevator World. photos by Lee Freeland The ASME A17 Wind Turbine Elevator (WTE) Committee met at the Mobile, Alabama, headquarters of Elevator World, Inc. on May 5-6. Members were given a tour of the facilities. Most had never seen how a magazine is created and the talent required,…Read More
Failures of door guiding means and door safety retainers on horizontally sliding doors can cause catastrophic injury to someone falling through a hoistway door into the hoistway when the elevator is not present. Knowledge of the significant elements of the design when performing elevator door installation and maintenance is critical for safety. This Continuing Education…Read More