Patent GB-104902-A (GB)
Title: Improvements in and relating to Route-indicating and Signalling Devices for use on Railways and the like.
Inventor: BERRY RICHARD GOLDING
IPC: B61L17/02
Filed: 1916-03-20
Abstract: 104,902. Berry, R. G., and Moore, H. W. March 20, 1916. Visual outdoor signals; interlocking signals and points. -A route - indicating signal comprises a number of sign plates 14 and a movable carriage 12 with electromagnetically-controlled means for clutching a selected plate to the carriage so as to be positively moved in both directions. The carriage may be moved by power or manually. Means are provided to prevent movement of more than one plate at a time. Circuit connexions are arranged for control of the route indicator by the points, and of the semaphores by the route indicator. Fig. 6 shows one end of the carriage 12 with the selecting- mechanism fcr ono signal plate. The carriage 12 is moved by a crank 11 operated by any desired means. Each signal plate 14 is carried in guides 16 by flanges 15, and has a slot 17 at its upper edge for engagement by a bolt 18. The bolt 18 is moved by a three-armed lever 21, 23, 28 pivoted on a spindle 22 fixed on the carriage 12. A spring 27 tends to rock this lever so as to depress the bolt 18, but stops 25, 29 prevent this. The stop 25 is fixed on the frame and so becomes ineffective when the carriage is moved forward. The stop 29 is pivoted on the carriage and is held effective by a spring, but is raised by a rod 37 when the selecting electro-magnet 33 is energized. The underside of the stop 29 is so shaped that this stop is held up after the stop 25 is cleared, thus allowing the spring 27 to rock the three-armed lever and lower the bolt 18. On the return of the apparatus to the normal position shown, the arm 23 is depressed by the fixed stop, and the stop 29 is re set by its spring. The upper edge of the signal plate passes through a casing containing a set of rollers movable transversely so as to allow any plate to pass between them, there being only sufficient clearance for one plate at a time. Fig. 7 shows an arrangement of circuits for electric operation of a four-way route indicator by a motor 49 under control of contacts at switch points and on signal levers, and for control of the motors for operating " main " and " calling on " signals by the route indicator. At each point-lever a pair of contacts, and at each switch points two indicating- relays 3 are provided and complete the circuit through the contacts 42, 43 on the signal levers to the magnets 33 of the route indicator. In addition to clutching the required sign plate, the magnet 33 closes contacts 48 to energize the motor 49, which drives the arm 11 to move the route-indicator carriage. When this movement is completed, a contact 52 on the signplate closes contacts 54 to energize the magnet 50 controlling the " main " and " calling on " signal motors. Contacts 60, closed by the carriage 12 when retracted, are arranged in series with contacts on the signal arms to control the circuit to indicator lamps in the cabin or the check locks on the signal levers. Modifications are made if the route indicator and signals are operated manually. The magnet 50 may then control a signal-reverser.