self-lapping

adjective

Of a valve, especially for brakes, maintaining the force of pressure selected by a control.

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Meanings

adjectiveself-lapping (not comparable)
  1. not comparableOf a valve, especially for brakes, maintaining the force of pressure selected by a control.
    2 more examples

    [...] Mr. Grierson remarks that on the L.P.T.B. tube stock in general the electro-pneumatic brake is in use, but that the new 1938 stock is fitted with the self-lapping electro-pneumatic brake, which is under the control of an automatic mercury-operated retardation controller when normal service stops are being made.

    1944 May and June, “Notes and News: Bakerloo Tube Stock”, in Railway Magazine, page 184

    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.

    1961 February, R. K. Evans, “The role of research on British Railways”, in Trains Illustrated, page 95

Origin

From self- + lapping.

Full word history & related roots →
Cite this entry
APA

self-lapping. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/self-lapping

MLA

“self-lapping.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/self-lapping. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “self-lapping,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/self-lapping.

Source: self-lapping on Wiktionary, CC BY-SA 4.0.