Railway switches and signals – Signals – Switch or switch stand
Patent
1988-11-16
1990-01-30
Kashnikow, Andres
Railway switches and signals
Signals
Switch or switch stand
246344, 246401, B61L 510, B61L 1102
Patent
active
048968501
ABSTRACT:
The system includes a motor and stepdown gear unit (17) which drives a central body (22) of a moving equipment longitudinally by means of a ball screw (20) and a nut. The moving equipment includes two slides (24, 25) sandwiching the central body (22). The two slides mesh with a common gear wheel mounted to rotate freely in the central body (22). Each of the slides drives a corresponding control bar (9, 10) connected to an operating rod (7, 8) in turn connected to one of the blades of a railroad switch, with said drive taking place via a vertical cylindrical floating peg (34, 35, 38, 39). The control bars (9, 10) are locked at the ends of the stroke of the central body (22) by respective ones of the floating pegs being positioned in a corresponding locking groove (40 to 43) of a fixed locking plate (30, 31). Any mechanical fault in the transmission linkage gives rise to relative displacement between the slides (24, 25) about the central body (22) and this is detected by the common gear wheel rotating, said gear wheel being fixed to means (27) for actuating a contact (29) for indicating anomalous operation.
REFERENCES:
patent: 1247447 (1917-11-01), Petty
patent: 1919272 (1933-07-01), Caruso
patent: 4093163 (1978-06-01), Larsson
patent: 4845225 (1989-06-01), Carmes
Kashnikow Andres
Newholm Timothy
Societe Anonyme dite: ALSTHOM
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