What is "detector lock"

Lock \Lock\, n. [AS. loc inclosure, an inclosed place, the fastening of a door, fr. l[=u]can to lock, fasten; akin to OS. l[=u]kan (in comp.), D. luiken, OHG. l[=u]hhan, Icel. l[=u]ka, Goth. l[=u]kan (in comp.); cf. Skr. ruj to break. Cf. Locket.]

1. Anything that fastens; specifically, a fastening, as for a door, a lid, a trunk, a drawer, and the like, in which a bolt is moved by a key so as to hold or to release the thing fastened.

2. A fastening together or interlacing; a closing of one thing upon another; a state of being fixed or immovable.

   Albemarle Street closed by a lock of carriages.
   --De Quincey.

3. A place from which egress is prevented, as by a lock.
   --Dryden.

4. The barrier or works which confine the water of a stream or canal.

5. An inclosure in a canal with gates at each end, used in raising or lowering boats as they pass from one level to another; -- called also lift lock.

6. That part or apparatus of a firearm by which the charge is exploded; as, a matchlock, flintlock, percussion lock, etc.

7. A device for keeping a wheel from turning.

8. A grapple in wrestling.
   --Milton.

   Detector lock, a lock containing a contrivance for showing whether it as has been tampered with.

   Lock bay (Canals), the body of water in a lock chamber.

   Lock chamber, the inclosed space between the gates of a canal lock.

   Lock nut. See Check nut, under Check.

   Lock plate, a plate to which the mechanism of a gunlock is attached.

   Lock rail (Arch.), in ordinary paneled doors, the rail nearest the lock.

   Lock rand (Masonry), a range of bond stone.
   --Knight.

   Mortise lock, a door lock inserted in a mortise.

   Rim lock, a lock fastened to the face of a door, thus differing from a mortise lock.

Detector \De*tect"or\, n. [L., a revealer.] One who, or that which, detects; a detecter. --Shak. A deathbed's detector of the heart. --Young. 2. Specifically:

1. An indicator showing the depth of the water in a boiler.

2. (Elec.) A galvanometer, usually portable, for indicating the direction of a current.

3. (Elec.) Any of various devices for detecting the presence of electric waves.

   Bank-note detector, a publication containing a description of genuine and counterfeit bank notes, designed to enable persons to discriminate between them.

   Detector lock. See under Lock.