bull's-eye
steam engine
coil
accumulator
armature
boiler
compressor
condensers
dynamo
electro-magnet
evaporator
exhaust
generator
heater
magneto
nozzle
piston
radiator
receiver
ringer
suction
transmitter
Ensor
Spencer
Spenser
biosensor
censer
censor
denser
dispenser
sensor
spencer