Reguline. adj.
Having the characteristics of a piece of metal, being flexible,
adherent, continuous, and coherent. Applied to electrolytic deposits.
Relative.
Indicating the relation between two or more things without reference to
absolute value of any one of them. Thus one lamp may be of relatively
double resistance compared to another, but this states nothing of the
resistance in ohms of either lamp.
Relay.
A receiving instrument which moves in accordance with impulses of
currents received, and in so moving opens and closes a local circuit,
which circuit may include as powerful a battery as required or
desirable, while the relay may be on the other hand so delicate as to
work with a very weak current.
Fig. 287. RELAY.
The typical relay includes an electro-magnet and armature. To the latter
an arm is attached and the lower end of the arm works in pivots. As the
armature is attracted the arm swings towards the magnet. When the
current is cut off, the armature and arm are drawn back by a spring.
When the arm swings towards the magnet its upper end touching a contact
screw closes the local circuit. When it swings back it comes in contact
with a second screw, with insulated point, and opens the circuit as it
leaves the first named screw.
One terminal connects with the arm through the pivots and frame. The
other connects with the contact screw through the frame carrying it.
Synonym--Relay Magnet.