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welder 1. An electrical device, often electronically
controlled, for welding materials. 2. A person who
operates a device, as defined in 1.
weldgate pulse In a welding device, the pulse that
affects the arc current; therefore, it also affects
the intensity of the heat produced by the device.
welding control An electronic system for controlling
the interval during which current is passed
through a workpiece in spot welding or seam
welding. In this system, an electronic timer circuit
determines the conduction time of thyraweighting
• wet electrolytic capacitor 747
Mark
Space
Mark
Space
Mark
Space
weighting
1. Adjustment of a parameter to compensate
for some imbalance in a system. 2. Adjustment
of the dot-to-space ratio in a Morse code
signal. 3. Adjustment of the mark-to-space ratio
in a digital communications signal.
weighting filter A filter used in a communications
network to represent the characteristics of the
transmission passband.
weighting network A network that weighs differently
(in a prescribed ratio) the frequency components
appearing in an output signal by offering
unequal attenuation to those frequencies.
weightlessness switch See ZERO-GRAVITY
SWITCH.
Weir circuit In frequency-modulated signal transmission,
a circuit used to stabilize the carrier
wave. It compares the average carrier frequency
with the frequency of a standard crystal oscillator,
obtaining a direct-current compensating voltage
(proportional to frequency deviation) that is
applied to the frequency modulator. Also called
Weir stabilization circuit.
Weiss constant In paramagnetism, a constant
also known as paramagnetic Curie temperature. It
can be positive or negative, depending on the particular
paramagnetic material. It is important in
defining the behavior of certain paramagnetic
substances.
weld
Time
Time
Time
weight, 3
1:1
Normal
3:1
Heavy
1:3
Light
A strong bond of materials (usually metals)
obtained by applying heat to areas to be joined
while they are held or pressed together. No foreign
metal is used, as is the case in brazing and
soldering. The required heat is sometimes obtained
by passing a high electric current through
the materials.
trons, ignitrons, or silicon-controlled rectifiers in
the welding circuit. The control system can also
regulate the welding current.
welding current The high electric current passed
through a workpiece to produce the heat required
for welding.
welding cycle The required sequence of steps (and
the time required) in making a weld electronically.
welding time See WELD TIME.
welding transformer For electronic welding, a
special very-high-current step-down transformer.
weld junction See WELD.
weld polarity The polarity of welding current.
Some materials require a certain direction of current
flow for a good weld.
weld time The interval during which welding current
flows through the bodies to be bonded together.
well counter A radiation-counter setup in which a
radioactive sample and detector are enclosed together
in a thick-walled (usually lead) cylinder to
minimize background count.
well-structured language An advanced form of
high-level computer programming language. It is
used in graphical and control applications.
Wenner element An adjustable, dual-slidewire
balancing resistor used in constant-current, laboratory
potentiometers to eliminate the necessity
for sliding contacts in the measuring circuit.
Wenner winding A low-capacitance, low-inductance
winding for high-frequency wirewound
resistors in which the direction of the wire is
reversed by looping alternate turns along the
form.
Wertheim effect The tendency for a potential difference
to develop between opposite ends of a
length of wire, when the wire is placed parallel to
magnetic lines of flux and rotated.
Western Union joint A strong splice of two wires
made by tightly twisting a short portion of the tip
of each wire along the body of the other. For increased
ruggedness, the joint is often soldered.
Also called Western Union splice.
Weston cell See STANDARD CELL.
Westrex system A system of sound recording in
which signals from two separate microphone
channels are recorded on opposite walls of a
groove on a disc.
wet battery A battery of cells having a liquid electrolyte.
wet Liquid, especially pertaining to the electrolyte
material in an electrochemical cell.
wet cell A battery cell having a liquid electrolyte.
Compare DRY CELL.
wet-charged stand The length of time that a fully
charged, wet storage cell can stand idle before its
capacity drops by a specified amount.
wet electrolytic capacitor An electrolytic capacitor
in which the electrolyte is a liquid. The leakage
current in this type is higher than in the dry