Arrangement for positively determining the actual sounding of a

Details Arrangement for positively determining the actual sounding of a Arrangement for positively determining the actual sounding of a

1990-12-07

1992-07-21

Spar, Robert J.

Railway switches and signals

Block-signal systems

Recorders

246185, B61L 1500, B61L 2500

Patent

active

051316129

ABSTRACT:
A system for positively determining that an engineman has actually activated a manual whistle valve to sound a pneumatic warning horn on a railway vehicle having a low pressure and high pressure sensing apparatus for conveying signals to an event recorder for monitoring and recording the pressure of an air supply source and the sounding of the pneumatic warning device.

REFERENCES:
patent: 404032 (1889-05-01), Currier
patent: 482393 (1892-09-01), Stockford
patent: 1041393 (1912-10-01), Williams et al.
patent: 1190173 (1916-07-01), Hudson
patent: 1304727 (1919-05-01), Baldwin
patent: 2325451 (1943-07-01), Wait
patent: 4052892 (1977-10-01), Browne
patent: 4285483 (1981-08-01), Cipollone
patent: 4361825 (1982-11-01), Shockley
patent: 4720807 (1988-01-01), Ferran et al.

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