ASME A17.3:2005 pdf free download

ASME A17.3:2005 pdf free download.Safety Code for Existing Elevators and Escalators.
governor rope retarding means: a mechanical means of developing a sufficient force in the governor rope to activate the car or counterweight safeties or to trip the governor rope releasing carrier, where used. Such mechanical means include, but are not limited to, rope- gripping jaws, clutch mechanisms, and traction arrangements.
handrail stand: the uppermost portion of the balustrade that supports and guides the handrail.
hoistway (shaft), elevator, dumbwaiter, or material lift:
an opening through a building or structure for the travel of elevators, dumbwaiters, or material lifts, extending from the pit floor to the roof or floor above.
hoisiway, blind: the portion of a hoistway where hoistway entrances are not provided.
hoistway, mulliple a hoistway with more than one elevator, dumbwaiter, or material lift.
hoist way, singk: a hoistway with a single elevator, dumbwaiter, or material lift.
hoistway, mine: The area within a mine shaft, and its above ground structure required for the elevator equipment, associated supports, and operations, including a minimum of 454) mm (18 in.) around same.
hoistway access switch: a switch, located at a landing, the function of which is to permit operation of the car with the hoistway door at this landing and the car door or gate open, in order to permit access to the top of the car or to the pit.
hoistway door see door.
hoistway door electric contact: see door or gate electric contact.
hoistway door or gate locking device: a device that secures a hoistway door or gate in the closed position and prevents it from being opened from the landing side except under certain specified conditions.
hoist u1y door combination ,nechanical lock and electric contact: a combination mechanical and electrical device with two related, but entirely independent functions, which are:
(a) to prevent operation of the driving machine by the normal operating device unless the hoistway door is in the closed position
(b) to lock the hoistway door in the closed position and prevent it from being opened from the landing side unless the car is within the landing zone
NOTE: As theftS is no positive mech.rnbcal connection between the electrk contact and the door locking mechanism, this device ensures only that the door will be closed, but not necessanly locked, when the car leaves the landing. Should 11w lock nwchanism fail to operate as intended when released by a stationary or retiring car-cam device, the door can be opened from the landing side even though the car is not at the landing. II operated by a stationary car-cam device, it does not prevent opening the door from the landing side as the car pas the floor.