Westinghouse Electric Corporation

Northrop Grumman Systems Corporation

Manvel A Geyer

Andress Kernick

Richard J Ravas

James H DeOms

Dale Allen Roberts

A wound core assembly and a method of manufacturing wherein the coil windings are cast and interconnected within the insulated chambers and end conductor molds. The insulated chambers act as the mold and subsequent insulation for the straight wire sections of each coil winding. After alignment of end conductor molds to connect predetermined chambers, coil windings are cast, the end conductors being formed within the passages of the end conductor molds.

Method of fabricating a wound core

An elevator system including an elevator car to be stopped at a predetermined stopping point from any initial speed below a predetermined maximum value, at a predetermined uniform rate of deceleration. The uniform rate of deceleration determines the desired speed versus distance-to-go reference pattern, which is initiated at a predetermined fixed distance from the stopping point. If the car speed is at the maximum value, deceleration will be initiated immediately. If the car speed is below the maximum value, the car is allowed to continue at the same speed until the car speed and location of the car relative to the stopping point match a point on the reference pattern. This point is accurately determined via digital feedback and comparison circuits which start the elevator car on the desired deceleration speed pattern with zero error. When the point on the reference pattern is reached, digital control circuitry including an up-down counter provides an error count for an actuator which controls the deceleration of the car to closely follow the reference pattern.

Elevator system

An elevator system which includes speed control apparatus which provides an error count representing the deviation of an elevator car from a desired speed versus distance reference pattern. Both the instantaneous and cumulative errors are indicated by the error count, and both are simultaneously corrected with digital precision by direct utilization of the error count. Anticipatory control of non-linear actuators responsive to the rate at which the cumulative error is corrected makes the system time optimal.

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Severna Park, MD, United States of America

Manvel A Geyer