ASME A17.3:201 7 pdf free download

ASME A17.3:201 7 pdf free download.Safety Code for Existing Elevators and Escalators.
electromechanically released: a means of release in which an electric current applied to an actuator (such as a solenoid) causes an electromagnetic force that overcomes a resisting force (such as a spring) as long as the electric current flows.
brake, driving machine, escalator or moving walk: an electromechanical device that Is part of the electric driving machine of the escalator or moving walk, used to apply a controlled force to a braking surface to stop and hold the escalator/moving walk system.
brake. emergency: a mechanical device independent of the braking system used to retard or stop an elevator should the car overspeed or move In an unintended manner. Such devices Include, but are not limited to. those that apply braking force on one or more of the following:
(a) car rails
(b) counterweight rails
(C) suspension or compensation ropes
(d) drive sheaves
(e) brake drums
For further information, see ASME A17.1-2004, Nonmandatory Appendix F.
brake, main drive shaft, escalator and moving walk: a device located on the main drive shalt of the escalator or moving walk used to apply a controlled force to the braking surface to stop and hold the escalator or moving walk system.
braking, electrically assisted: retardation of the elevator, assisted by energy generated by the driving-machine motor. See ASME Al 7.1-2004, Nonmandatory Appendix F.
braking system: driving-machine brake alone, or in combination with electrically assisted braking, which operates to slow down and stop the elevator. See ASME A17.1-2004, Nonmandatory Appendix F.
buffer: a device designed to stop a descending car or counterweight beyond Its normal limit oftravel by storing or by absorbing and dissipating the kinetic energy of the car or counterweight.
oil buffer; a buffer using oil as a medium, which absorbs and dissipates the kinetic energy of the descending car of counterweight.
gas spring-return oil buffer: an oil buffer utilizing the pressure of a compressed gas to return the butler plunger or piston to its fully extended position.
mechanical spring-return oil buffer: an oil buffer utilizing the force ol the compressed mechanical spring or springs to return the buffer plunger or piston to its fully extended position.
oil buffer stroke: the oil-displacing movement of the buffer plunger or piston, excluding the travel of the buffer plunger accelerating device.