clack box

English

Noun

clack box (plural clack boxes)

1. The box or chamber in which a clack valve works.
   • 1946 March and April, “The Why and The Wherefore: Clack-Boxes”, in Railway Magazine, page 129:

     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.

2. (UK, slang, obsolete) A person's tongue or mouth.
3. (UK, slang, obsolete) A garrulous person; a chatterbox.

References

• John Camden Hotten (1873) The Slang Dictionary

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “clack box”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)