A SPARKING PLUG FOR FORDS.
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The Sphinx Manufacturing Co., Ltd., of Birmingham, recently produced a new, plug, which should prove particularly suitable for Ford engines, and, as a matter of fact, is designed for this special purpose. In the Ford engine the sparking plugs usually give a considerable amount of trouble owing to oiling-up, due to the splash-lubricating system which is employed.
The plug, Which is known as the A.C. Sphinx 1075, is arranged with a patented porcelain insulator, which is said to be carbon-Proof. The lower portion of this insulation is provided with saw-toothed edges, and while the engine is running the edges attain sufficient heat to burn away any oil which may be deposited, whilst, at the same time, the effective insulating area is considerably increased. • The lower electrode is welded to the body of the plug and is so shaped that it forms a natural drain for the oil, so that this does not lodge in the spark gap:
The porcelain, complete with its central electrode, is held in position by asgland nut, the removal of which permits the insertion of new porcelains, which are priced at 1s. 6c1., including a copper asbestos washer and spring terminalfittings. The complete plug costs 3s.
This new type of Sphinx Sparking plug should meet. the needs of many users of Ford vans and one-ton trucks who have experienced trouble in ,obtaining satisfactory ignition. Naturally, it must not be expected to perform such wonders as that of giving satisfactory sparking when the coils or other parts of the Ford ignition system are defective, but it will function in circumstances where many other plugs would prove dismal failures, either . through oiling-up or shorting across carbon deposit.