Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3150019A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOHN JAMES VINCENT CONNAUGHTON
Original Assignee
JOHN JAMES VINCENT CONNAUGHTON
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Publication date
Application filed by JOHN JAMES VINCENT CONNAUGHTONfiledCriticalJOHN JAMES VINCENT CONNAUGHTON
Priority to GB3150019ApriorityCriticalpatent/GB159675A/en
Publication of GB159675ApublicationCriticalpatent/GB159675A/en
H01H51/20—Non-polarised relays with two or more independent armatures
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
Lighting Device Outwards From Vehicle And Optical Signal
(AREA)
Abstract
159,675. Railing, M. J., and Connaughton, J. J. V. Dec. 16, 1919. Mine and colliery signalling systems.-A relay, applicable for cancelling signals in mine signalling apparatus, has two armatures which respond to a weak and to a strong current respectively. Thus an armature may close a cancelling or other circuit when the engine begins to move, while the other may operate when the engine attains a given speed and the current reaches a corresponding value. The armature C has a narrower air-gap and corresponds to a weak current, closing contacts at F. This armature has a small cross-section so as to be saturated by a small flux. The armature E has a larger cross section and a large air gap, and responds to a heavier current, first breaking contact at F and then pulling away the lever I, pivoted at H, so as to break contact at J.
GB3150019A1919-12-161919-12-16Improvements in electric relays for signalling
ExpiredGB159675A
(en)