Mechanical locking and release of the route Repeat locks Coupling of semaphores

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Industry

CPC
B61L21/02

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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B61Railways B61LGUIDING RAILWAY TRAFFIC ENSURING THE SAFETY OF RAILWAY TRAFFIC B61L21/00Station blocking between signal boxes in one yard

Current Industry

B61L21/02Mechanical locking and release of the route Repeat locks Coupling of semaphores

Industries

Patents Grantslast 30 patents

Information Patent Grant
1763530
- Patent number 1,763,530
- Issue date Jun 10, 1930
- B61 - RAILWAYS
Information Patent Grant
1710519
- Patent number 1,710,519
- Issue date Apr 23, 1929
- B61 - RAILWAYS