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Walter Allan Pearce
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Individual
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Individual
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Publication of GB190600705ApublicationCriticalpatent/GB190600705A/en
705. Pearce, W. A. Jan. 10. Signals, semaphore.-The semaphore arm is controlled by the hand-operated thrust-rod 6 and the electro-magnet 13, the circuit of which is closed at a contact made by the first movement of that part of the coupling attached to the handlever. Other contacts, as a track treadle 30, may be included in the circuit. The thrust-rod 6 rocks the cranks 8, 9, about the spindle 4. The switch 10, 11 closes the circuit of the electro-magnet, and the large stud on the crank 9 engages the lever 15 pivoted to the disk 2 and connected by the link 16 to the bell-crank 17 also pivoted to the disk 2, to which the signal rod 1 is pivoted. The end 19 of this member 17 is pivoted to the armature 20 of the electro-magnet, which when energized holds the armature to afford a fixed pivot about which the bell-crank is then turned by the thrust-rod and so operates the disk 2 and the rod 1. When the magnet is de-energized, the armature 20 moves about the pivoted link 21, and no movement of the semaphore arm can be caused by the thrust-rod 6.
GB190600705D1906-01-101906-01-10Improvements in Signalling Mechanism.
ExpiredGB190600705A
(en)