Railway switches and signals – Block-signal systems – Recorders
Patent
1979-05-07
1981-08-25
Miller, J. D.
Railway switches and signals
Block-signal systems
Recorders
235 92T, B61L 2100
Patent
active
042854830
ABSTRACT:
An events-monitoring and recording system for providing at any desired time a tangible record of a large number of several kinds of different events that have occurred randomly over an extended period of time, and in the case of each event further providing an accurate record of the date and time of day at which the individual event occurred. The data of the events are immediately produced and stored for future access as the events occur, without involving any moving mechanisms and with recording of each change of time from AM to PM and from one day to the next, whereby the system is capable of operating faultlessly in extremely adverse environments subject to vibration, heat, cold, particulate and gaseous pollutants and without attention over extended periods of time. Events data are electronically produced in response to receipt of respective electric signals and the data are stored in a circulating type memory of large but finite capacity, whereby when the memory is filled the oldest event information is discarded incident to a new event occurring. Storage is of indefinite duration and the information remains stored and available for accessing at any time by an auxiliary portable print-out device which may be transported to any of a plurality of the monitoring systems at diverse locations.
REFERENCES:
patent: 2153675 (1939-04-01), Pflasterer
patent: 3175125 (1965-03-01), Smith
patent: 3478202 (1969-11-01), Snodgrass
patent: 3984815 (1976-10-01), Drexler et al.
patent: 4142680 (1979-03-01), Oswald et al.
Crowe John H.
Eisenzopf Reinhard J.
Electro Pneumatic Corporation
Miller J. D.
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