From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Product data sheet for interference eliminators and compensators for various electrical motors and apparatus.
| Identifier | ExFiles\Box 165\5\ img161 | |
| Date | 22th May 1936 guessed | |
| INTERFERENCE ELIMINATION. Sparking caused by contacts being broken causes interfering noises to be radiated through the mains. It is the purpose of the Interference Compensator to block this radiation. To a predominating degree the trouble arises from high frequency currents, their characteristic sign being more or less continuous crackling or rustling, while low frequency currents generally make themselves heard by a humming sound. If Interference Compensators are connected to the source of the interference, these interfering currents are short-circuited and made ineffective, thus preventing radiation. The principle to be adopted for effective elimination is therefore : ELIMINATE THE INTERFERENCE AT ITS SOURCE. All Interference Eliminators are fitted with Internal Fuses—protected earth capacity and suitable Wire Leads for connection to the source of interference. Types Capacities SK 1 .1-C-.1 For A.C. Motors SK 2 .5-C-.5 For Heavy Interference from A.C. Motors SK 3 C-.1-.1-1 For 3-phase Motors SK 4 C-.5-.5-.5 For Heavy Interference from 3-phase Motors SK 5 .1+100 Ω For Bells, Relays, etc. SK 6 .1+100 Ω-C-100 Ω+.1 For Bells, Relays, etc. SK 22 2-C-2 For D.C. Motors SK 44 4-C-4 For Heavy Interference from D.C. Motors SK 34 For Direct Mounting on Fract. H.P. Motors SK 35, SK 36 For Single Phase Rotary Convertors For 3-phase Rotary Convertors SK 37 Tubular Compensator for Gramophone Motors, Hair Dryers, Toy Motors, etc. SK 38, SK 39 For Heavy Interference from A.C. or D.C. Motors, also for Large H.P. Motors As SK 38 but for more severe cases In particularly difficult cases our Engineers will be pleased to give advice free of charge and without engagement. Special types available to suit particular requirements. PRICES FOR INDUSTRIAL USERS ON APPLICATION We solicit your enquiries for Condensers to be used in conjunction with the following :- BATTERY IGNITION ; MAGNETOS ; SPARK-DAMPING ; POWER FACTOR CORRECTION OF NEON DISPLAYS ; SINGLE PHASE INDUCTION MOTORS ; ELECTRO MEDICAL APPARATUS. WEGO CONDENSER CO., LTD., Perivale, Greenford, Middlesex. Phone.: PERIVALE 2477/3891 Stocks also at 61 Spencer Street, Clerkenwell, London. | ||