Handbook of Technical Instruction for Wireless Telegraphists |
Common terms and phrases
accumulator acid adjustment aerial circuit alternating current ammeter ampere amplifier angle anode applied E.M.F. armature arrangement back E.M.F. battery brushes called capacity cell charge choke circuit containing commutator condenser conductor connected copper coupling crystal curve detector diagram difference direct current disc discharge dynamo ebonite effect electrical electro-magnet electrodes electrolyte employed energy external circuit filament frame frequency galvanometer given grid increase indicated induced E.M.F. induction coil instrument insulated iron lead lines of force machine magnetic field Marconi maximum means measured metres motor note magnifier number of lines obtained Ohm's Law operated oscillations passing phase pole position potential primary produced radiation receiver rectified relay resistance rotating screen grid secondary shown in fig signal spark spark gap specific gravity starter stud sulphate supply switch switchboard telephone terminal transformer transmitter valve variometer vector voltage voltmeter volts wave wavelength winding wire wireless zero