[Illustration: An indispensable link between producer and consumer.]
A familiar application of the repeater principle is that used in
hotels and public buildings, where a number of repeater clocks are
operated from one master instrument. Likewise, the repeater used upon
the bridge, the bearing repeater, and the one at the after steering
station, are all operated by electricity in perfect unison with the
Master Gyro-Compass and show the exact reading of the Master at any
instant. Repeaters are operated by a small electric motor within each
case, controlled by the transmitter at the Master Gyro. In designing
the repeaters particular attention has been given to the electrical
circuits so as to make all connections water, spray and condensation
proof. Stuffing tubes of improved design are used at all outlets and
entrances.
A miniature electric lamp within the repeater supplies the necessary
illumination of the dial. The illumination can be brightened or dimmed
by turning the switch handle on the face of the terminal box.
The repeaters are supplied in three styles: