05185700 is referenced by 77 patents and cites 17 patents.

A solid state event recorder having particular application to railroad locomotives has a plurality of interface modules to allow the collection of desired data over a period of time. Radio downloading of the data provided by a telemetry transmitter to wayside receivers is the primary way of downloading data. Alternate data downloading are provided by a removable memory module, a portable wireless data extractor and a laptop computer. The removable memory module is provided with its own backup battery power supply but normally derives its power from an inductive coupling to the solid state recorder. Data is read into the removable memory module from the solid state recorder via an inductive coupling, and data is read out of the removable memory module to the telemetry transmitter via another inductive coupling. Both the portable wireless data extractor and the laptop computer are used for maintenance purposes. The solid state recorder can be configured in a variety of ways and connected together as master and slave. For example, one recorder, acting as a master and functioning as the primary or operational recorder, can be connected to a second recorder, acting as a slave time synchronized with the first recorder. This second recorder can serve as a maintenance recorder for collecting long term data and trouble shooting a particular locomotive.

Title
Solid state event recorder
Application Number
367191
Publication Number
5185700
Application Date
August 13, 1991
Publication Date
February 9, 1993
Inventor
Joseph I Field Jr
Fairfax County
VA, US
Emilio A Fernandez
Fairfax County
VA, US
Angel P Bezos
Montgmery County
MD, US
Agent
Whitham & Marhoefer
Assignee
Pulse Electronics
MD, US
IPC
G06F 15/74
View Original Source