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).
Advertisement for a dashboard-mounted manifold ignition indicator and plug tester.
| Identifier | ExFiles\Box 33\5\ Scan023 | |
| Date | 3rd June 1920 guessed | |
| Raise the Standard of your Car by fitting this ingenious time saver. THE MANIFOLD IGNITION INDICATOR & PLUG TESTER A Dashboard Flush Type Fitting for Detecting Ignition Trouble. The first test invariably made in case of engine trouble is Plugs ! Certainly, and you waste hours of valuable time, spoil clothes and temper tinkering about on the roads, and in the garage, seeking faults without success. Well, why not apply scientific methods ? Reflections. It is when one comes to be stuck with Car in the country, miles away from the Garage, or in the centre of busy thoroughfares that the utility and value of the MANIFOLD Indicator is realised. The installation of the MANIFOLD Indicator inspires confidence and adds pleasure and comfort, besides being a great economiser of TIME and LABOUR. NO LOSS OF TIME OR TEMPER AND NO DIRTY HANDS The main difficulty of keeping an engine in thorough tune is due to the lack of a universal and sound method of testing the actual working of sparking plugs under compression. THE SYSTEM WHICH GIVES ACCURATE AND RELIABLE RESULTS. Stranded Motorist:- I've been here an hour - Nearly taken the darn thing to pieces and I can't find what's wrong? Sympathetic Pal:- No! and if you had one of these fitted on your car you would have known in a second. THE TESTER WHICH OPERATES ON SOUND SCIENTIFIC PRINCIPLES. MISFIRING CAN BE DETECTED INSTANTLY. THE MANIFOLD INDICATOR tells you clearly whether or not the plug is sparking in the cylinder without the removal of the plug, under working conditions by day or night, in all weathers—and that instantly, No other test is just as good ; a plug may spark in air en it will not spark under pressure in the cylinder. THE MANIFOLD INDICATOR Plug Tester is All-British. The name is a guarantee of excellence. Every instrument is thoroughly tested before leaving the works. Nothing to get out of order ; will last indefinitely. Invaluable to every user of an internal combustion engine—motorist, pilot, garage, aerodrome. Saves time, temper, labour ; above all means sweeter running and better mileage. Any engine can be tested in a few seconds. Ignition is at the root of 90 per cent. of the troubles to which the user of an internal combustion engine is heir. The Manifold Indicator and Plug Tester finds or indicates the position of trouble at once, by pressing the knobs provided for each cylinder. The Spark Gaps are varied at will by the operator. Is Supplied Finished in Polished Brass or Plated Price £4 4s. For 4 Cylinder. Price £5 5s. For 6 Cylinder. Complete with cables and screws provided for the Dashboard. 'Place Terminal ends as numbered on your plugs, and screw down. Indicator is now ready for use. If your trouble is an internal short, the Indicator shows NO SPARK, with a small or wide gap at the Indicator Terminals. If you have an internal break or wide plug gap, your Indicator will show A SPARK with a wide or small gap at the Indicator Terminals. If your plugs are correct, the Indicator shows A SPARK with 1/32-in. gap and a drop in Engine Speed during the test. If you have a leaky plug, the Indicator shows A SPARK, with a small gap and no drop in Engine Speed. The MANIFOLD INDICATOR also tests your Magneto or Battery Coil Ignition. It is important to see that the earth wire is securely attached to any convenient Engine bolt. A boon to all classes of Motorists, and is indispensable for pleasure tours or business cars. To be obtained from all Motor Car Manufacturers and principal Garages, or to avoid delay, on receipt of remittance direct from the Manufacturers and Patentees. 'Phones: 436, 437, 438 West Bromwich Telegrams: Expert, Westbromwich ROBERTS (West Bromwich) Limited AUTOMOBILE ENGINEERS 57, Bratt St.{Capt. P. R. Strong}, and 377, High St.{Capt. P. R. Strong}, West Bromwich AGENTS FOR ALL LEADING MAKES OF PLEASURE AND COMMERCIAL CARS | ||