Improvements in or relating to railway axle counting apparatus

Abstract

Abstract 373,649. Train axle counting apparatus. VEREINIGTE EISENBAHNSIGNALWERKE GES., Siemensstadt, Berlin. Feb. 17, 1931, No. 5064. Convention date, March 27, 1930. [Class 105.] An apparatus for counting axles in or out according to the direction of travel comprises relays 3, 4 which are energized over track contacts 5, 6 and serve to control relays 1, 2 by which a current pulse is given to the counting-in device E or counting-out device A depending on the direction of travel. An axle moving in the direction of the arrow first energizes the relay 3 only, then the relays 3, 4, and finally the relay 4 only. In the first interval, relav 3 closes contact 30 so that relay 1 is energized over back contact 42 of relay 4 ; in the second interval wherein relays 3, 4 are both energized this circuit is opened at contact 42 of relay 4 but relay 1 continues energized over front contact 41 of relay 4, its own front contact 12, and back contact 21 of relay 2 ; in the third interval front contact 40 of relay 4 and back contact 32 of relay 3 are closed and energize relay 2 so that the counting-in device E receives a pulse since the contact 10 of relay 1 opens when this latter relay 1 is de-energized by the opening of contact 21 when relay 2 is energized. Passage of an axle in the reverse direction operates the counting-out device A in a similar manner. Condensers are inserted across the relays and counting devices to prolong the impulses. The relays 3, 4 may be energized by the inductive impulses arising from the passage of the train.

Inventors

No inventors recorded.

Bibliographic Details