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A SIMPLE RECORDING IMPULSE COUNTER
Author(s) -
THORP R. H.
Publication year - 1948
Publication title -
british journal of pharmacology and chemotherapy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0366-0826
DOI - 10.1111/j.1476-5381.1948.tb00386.x
Subject(s) - citation , simple (philosophy) , classics , operations research , philosophy , library science , computer science , art , mathematics , epistemology
The principle of the impulse recorder is shown diagrammatically in Fig. 1. Each impulse operates the electromagnet A and draws down the pawl B. When the circuit is broken at the end of the impulse, the return of the armature pawl lifts the rack bar C by one tooth. There is a -second pawl, concealed by B in the diagram, which prevents the rack bar from falling while the pawl B is in motion. The rack bar is cut to give 50 teeth each of one Ilimetre pitch and a writing point D is attached to the top of the bar. Impulses are therefore