Dictionary
Words, grammatical forms and meanings linked to the ontology.
clack box en · NOUN
Meanings
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The box or chamber in which a clack valve works.
The connecting pipe between a locomotive injector and the boiler, through which the water is forced into the boiler against the steam pressure within, is provided with a "clack-valve," which allows the water to pass in the inward direction only and not the outward; this is housed in a "clack-box". No question of "advantages or disadvantages" attaches to the use of a clack-box; it is a necessary part of locomotive equipment.
1946 March and April, “The Why and The Wherefore: Clack-Boxes”, in Railway Magazine, page 129:
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(UK, obsolete, slang) A person's tongue or mouth.
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(UK, obsolete, slang) A garrulous person; a chatterbox.
Forms