self-lapping
English
Etymology
From self- + lapping
Adjective
self-lapping (not comparable)
- Of a valve, especially for brakes, maintaining the force of pressure selected by a control.
- 1961 February, R. K. Evans, “The role of research on British Railways”, in Trains Illustrated, page 95:
- Thus, in the newer locomotives for the Great Northern line, the Woodward governors are adapted for air (not solenoid) control and continuous engine speed control through a self-lapping valve replaces the individual-speed steps, allowing operation in multiple with English Electric and Birmingham diesels.
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