18WuD2x

492 oiled paper • one-lunger
oiled paper Insulating paper impregnated with oil
for waterproofing and to increase its dielectric
strength.
oil-filled cable A cable whose insulation is impregnated
with oil that can be maintained at a constant
pressure.
oil-filled capacitor See OIL CAPACITOR.
oil-filled circuit breaker See OIL CIRCUIT
BREAKER.
oil-filled transformer A transformer whose case is
filled with an insulating oil.
oil fuse cutout A fuse cutout that is filled with an
insulating oil. Compare OPEN-FUSE CUTOUT.
oil-immersed transformer See OIL-FILLED TRANS-
FORMER.
oil-impregnated capacitor See OIL CAPACITOR.
oil pump A vacuum diffusion pump using oil instead
of mercury. Also see DIFFUSION PUMP.
oil switch A switch enveloped by insulating oil.
OLRT Abbreviation of online real time (operation).
OM Amateur radio jargon for OLD MAN: chief
(male) operator, or husband of female operator.
omega A phase-dependent radionavigation system
using single-frequency, time-shared, ICW transmissions
from two or more locations.
omnibearing A navigational bearing obtained by
means of OMNIRANGE.
omnibearing converter An electromechanical device
in which an OMNIRANGE signal and vehicle
heading information are combined, the output
being a signal that is fed to a meter.
omnibearing indicator Abbreviation, OBI. An omnibearing
converter with a dial and pointer.
omnibearing line In an OMNIRANGE system, one
of the imaginary lines extending from the geographic
center of the omnirange.
omnibearing selector A device that can be set
manually to a selected omnibearing.
omniconstant calculator A calculator that adds
or multiplies numbers in succession in such a
manner as to arithmetically or geometrically increase
the exponent as a single button is repeatedly
pressed.
omnidirectional 1. Pertaining to a device that
responds equally well to acoustic or electromagnetic
energy from any direction in three
dimensions. 2. Pertaining to a device that radiates
acoustic or electromagnetic energy equally
well in any direction in three dimensions. 3. Also,
NONDIRECTIONAL. Pertaining to an antenna
that intercepts or radiates equally well in any azimuth
(horizontal) direction.
omnidirectional antenna See NONDIRECTIONAL
ANTENNA.
omnidirectional hydrophone A hydrophone that
picks up underwater sounds coming from any direction.
omnidirectional microphone A microphone that
picks up sounds coming from any direction.
omnidirectional radio range See OMNIRANGE.
omnidirectional range See OMNIRANGE.
omnidirectional range station Abbreviation,
ORS. A radionavigation station for OMNIRANGE
service.
omnigraph A Morse-code generator that operates
via marked or perforated paper tape.
omnirange A radionavigation system in which
each station in a chain broadcasts a beam in all
directions. It usually operates at very-high frequencies
(VHF) or ultra-high frequencies (UHF).
Pilots of aircraft home on a particular station by
tuning it in and noting its bearings.
OMR Abbreviation for OPTICAL MARK RECOGNI-
TION.
on air See ON THE AIR.
on-call channel An assigned radio channel of
which exclusive, full time use is not demanded.
on-course curvature In navigation, the rate at
which the course of a vehicle deviates with reference
to the distance along the true course.
on-course signal A single-tone-modulated signal
indicating to an aircraft pilot following a radio
beam that the flight is substantially on course.
on current See ON-STATE CURRENT.
on delay An interval during which a circuit remains
off after an actuating signal has been supplied.
Compare OFF DELAY.
on-demand system A system, especially in computer
and data-processing operations, that delivers
information or service immediately upon
request.
ondograph An electromechanical device that
graphically draws alternating-current waveforms
on paper.
ondoscope
A radio-frequency (RF) energy detector
that consists of a neon bulb attached to the end
of an insulating rod. When a bulb is held in an intense
RF field, the field energy ionizes the gas in
the bulb, causing it to glow without direct connection
to the RF circuit.
one-address code In computer programming, a
code in which the address in an instruction refers
to only one memory location.
one condition See ONE STATE.
one-digit adder See HALF ADDER.
one-element rotary antenna A directional antenna
consisting of a radiator only (no directors
or reflectors) that can be rotated. A straight, rigid,
half-wave rotatable dipole is the most common
configuration.
one-for-one compiler A compiler that generates
one machine language instruction from one
source language instruction.
one-input terminal In a flip-flop, the input terminal
that must be energized to switch the circuit to
its logic 1 output.
one-level address See ABSOLUTE ADDRESS.
one-level subroutine In a computer program, a
subroutine in which no reference is made to other
subroutines.
one-lunger Colloquialism for a radio transmitter
consisting entirely of a one-transistor oscillator.