Railway switches and signals – Switches – Lock
Patent
1988-11-17
1990-05-01
Kashnikow, Andres
Railway switches and signals
Switches
Lock
246344, 246401, E01B 702, B61L 1102, B61L 500
Patent
active
049211897
ABSTRACT:
The invention relates to an outer point lock device for switchpoints, particularly on high-speed railways. This device comprises two point locks (1, 2) associated each with one of the blades (A1, A2) of the switchpoint. Each point lock comprises a box (3) secured to the corresponding stock-rail (C1, C2) and containing two slides (7, 8) parallel to each other. The slides are superposed on each other and slidably guided across the rails. The so-called lock-slide (8) is connected to the respective blade (A1, A2) and carries a lock member (17, 49) to become locked to the box (3) in the closed position of the blade (A1, A2). The lock slide is coupled to the other so-called drive-slide (7) through a coupling device (28, 29; 249, 307) automatically engageable or disengageable as a result of the overlap stroke of the drive-slide (7) with respect to the lock-slide (8). The drive-slides of the two point locks (1, 2) are connected to each other and to a drive or control rod (44). Each drive-slide (7) is provided with a snap lock device (10, 11a, 11b; 45, 11a, 11d) to lock the slide (7) to the box (3) at the two end positions thereof. Each drive-slide (7) is also provided with means (119, 219; 407) for the direct or indirect actuation of the lock member (17, 49) of the corresponding lock-slide (8).
REFERENCES:
patent: 1550117 (1928-08-01), Smith
Kashnikow Andres
Newholm Timothy
Sasib S.p.A.
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