Cleats.
A support; a short block of wood, grooved transversely, for holding
electric wires against a wall. For the three wire system three grooves
are used. The entire wiring of apartments is sometimes done by the
"cleat system," using cleats instead of battens, q. v., or mouldings.
The cleats are secured against the wall with the grooves facing it, and
the wires are introduced therein.
Fig. 91. TWO WIRE CLEAT.
Fig. 92. THREE WIRE CLEAT.
Cleat, Crossing.
A cleat with grooves or apertures to support wires which cross each
other. Two or three grooves are transverse, and on the under side, as
above; one groove is longitudinal and on the upper side.
Cleavage, Electrification by.
If a mass of mica is rapidly split in the dark a slight flash is
perceived. Becquerel found that in such separation the two pieces came
away oppositely charged with electricity. The splitting of mica is its
cleavage.
Clock, Controlled.
In a system of electric clocks, the clocks whose movements are
controlled by the current, regulated by the master or controlling clock.
Synonym--Secondary Clock.
Clock, Controlling.
In a system of electric clocks the master clock which controls the
movements of the others, by regulating the current.
Synonym--Master Clock.
Clock, Electric Annunciator.
A clock operating any form of electric annunciator, as dropping
shutters, ringing bells, and the like. It operates by the machinery
closing circuits as required at any desired hour or intervals.