Abbreviation for Birmingham Wire Gauge.

An electric alarm or call produced by a rapid vibration of electric make
and break mechanism, which is often magnified by enclosure in a
resonating chamber, resembling a bell, but which is not struck or
touched by the vibrating parts. Sometimes a square wooden box is used as
resonator.

A copper conductor used in electric lighting or power stations, to
receive the current from all the dynamos. The distributing leads are
connected to the bus wires.
In the three-wire system there are three; in the two-wire system there
are two bus wires.
The name is undoubtedly derived from “omnibus.”
The bus wires may be divided into positive, negative, and, in [...]

(a) In a dynamo, the production of shifting and temporary arcs between
the commutator and brushes, which arcs produce heat enough to injure the
parts in question.
(b) In electro-plating, a defect due to too strong a current in
proportion to the strength of solution and area of electrodes. This
gives a black or badly-colored deposit.

A species of switch which is actuated by the pressure of a button. In
its normal position the button is pressed outwards by a spring, and the
circuit is open. When pressed inwards, it closes the circuit. When
released it springs backward and opens the circuit again.
They are principally used for ringing bells. If the latter are of [...]

A gas burner arranged for the flame to be lighted by electricity. It
takes a great variety of forms. In some cases a pair of terminals are
arranged near the flame or a single terminal is placed near the metal
tip, the latter forming one of the terminals. The spark is generally
produced by an induction coil, or a [...]

A buoy for use to indicate channels or dangers in harbors and elsewhere,
which carries an electric light, whose current is supplied by cable from
shore. It has been proposed to use glass tubes exhausted of air and
containing mercury, which, as moved by the waves, would produce a
luminous effect. A fifty-candle power incandescent lamp is an approved
source [...]

In photometry, the Bunsen Disc is a piece of paper upon whose centre a
spot is saturated with melted paraffin, or a ring of paraffined surface
surrounds an untouched central spot. If placed in such a position that
it receives an equal illumination on each side, the spot almost
disappears. It is used on the bar photometer.

A connection or arrangement for overcoming a “bug.” It is said that the
terms “bug” and “bug trap” originated in quadruplex telegraphy.

Any fault or trouble in the connections or working of electric
apparatus.