Abstract: Analyzer apparatus for evaluating the performance of an elevator type transportation system that has a plurality of transport vehicles that serve a plurality of common stations includes a plurality of interface circuits each for connection to a system component to be monitored such as an elevator hall call button or a car relay, and each providing an output signal indicative of the current status of its monitored system component. Associated with each interface circuit is one or more event accumulator devices, and logic interconnects each interface circuit and its corresponding event accumulator device or devices. The analyzer also includes a signal generator for repetitively generating signals at periodic time intervals, and circuitry for applying each time interval signal to the logic for causing an accumulator device to accumulate event duration counts as a function of the monitored component current status signals from its interface circuit.

Abstract: A call button replacement circuit includes a controllable solid state switch that has a control terminal and a two-terminal output circuit, a manually operated switch, an indicator device, and a capacitor. The solid state switch is connected in circuit between a high voltage terminal and a call-acknowledge terminal; the manually operated switch is connected between the high voltage terminal and the control terminal of the solid state switch so that momentary actuation of the manually operated switch places the solid state switch in conducting condition and applies a call signal to the call-acknowledge terminal; the capacitor is connected between the call-acknowledge terminal and the control terminal, and the indicator device is connected in circuit with the solid state switch so that it is energized and produces a light output when the solid state switch is in conducting condition.