Fig. 58. RESISTANCE COILS SHOWING BIFILAR WINDING.
Bifilar Winding.
The method followed in winding resistance coils to prevent them from
creating fields of force. The wire is doubled, and the doubled wire
starting with the bend or bight is wound into a coil. The current going
in opposite senses in the two lays of the winding produces no field of
force.
Binary Compound.
A chemical compound whose molecule contains only two elements, such as
water (H2 0), lead oxide (Pb 0), and many others.
Binding.
In a dynamo or motor armature the wire wound around the coils to secure
them in place and prevent their disturbance by centrifugal action.
Fig. 59. DOUBLE BINDING POST.
Fig. 60. BINDING POST, ENGLISH PATTERN.