DICTIONARY OF

Elastic Coupling 126 Elliots Eye
Elastic Coupling. Coupling in which springs are incorporated to deaden excessive shocks
put on mechanism. 2. Connection in a machine in which a certain amount of change in
alignment is allowed for.
Elastic Limit. Maximum value in tons per square inch of sectional area of a metal member,
that can be applied to the member without causing permanent deformation.
Elastic Propeller. Experimental propeller having blades of elastic steel. As pressure
increases, blades approach a disc-like form.
Elbow. Half turn of one cable around the other ^when riding at open hawse. Results from
swinging twice in the same direction at turn of tide. 2. Alternative name for 'Knee.'
Elder Brethren. Masters of Trinity House, London.
Electric Circuit. Conductor along which an electric current is confined.
Electric Current. Passage of negatively-charged electrons along a conductor.
Electric Fish. Fish that gives a galvanic shock when touched. Silurus and torpedo fish are
examples.
Electricity. Energy that is possibly due to movement in atoms. Manifests its existence in
production of light, heat, decomposition, and in formation of a magnetic field.
Electric Log. Log that is electrically connected to register distance, and/or speed, at a
position remote from the log. Name was originally given to a log that had a wire in the
logline so that registration unit could be started or stopped at a precise instant.
Electric Propulsion. Ship propulsion by propellers driven by electricity generated in a ship.
Electric Psychrometer. Hygrometer of Assmann type but with electrically-driven fan.
Electric Superheater. Electrically-heated element interposed between H.P. and I.P. engine
to reheat exhaust steam from H.P. cylinder.
Electric Welding. Uniting of two pieces of metal, by fusion, with an electric arc.
Electrode. Conductor by which electricity is passed to a liquid or gas.
Electro Magnet/ Core of iron or steel, surrounded by a coil, and becoming magnetised when
electric current passes through coil.
Elephanta. Electrical storm accompanying the break of the Indian rainy season and
commencement of Madras monsoon.
Elevated Pole. That pole of Earth, or heavens, that has same name as observer's latitude, and
is, therefore, above his horizon.
Elevation. Height above a given plane. May be expressed in lineal measurement, or as an
angle. Formerly used as meaning 'altitude'.
Elliot's Eye.* Splice formerly made in rope cable. One strand was unlaid into three smaller
ropes: two of these ropes were long-spliced together, the third was eye-spliced. Thimble was
then fitted into the two eyes thus formed; the whole being finished off with a seizing and
keckling.