US Patent: 676,468
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| Ignition Plug for Gas Engines
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Patentee:
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| Norman McClintock (exact or similar names) - Pittsburg, Allegheny County, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 30, 1899 |
| Granted: |
Jun. 18, 1901 |
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Joel Havens
"Vintage Machinery" entry for C. Aultman & Co.
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Description: |
| Abstract:
Heretofore ignition-plugs have been made or proposed with electrodes-passing longitudinally through the plug and insulated therefrom by means of spools or blocks of porcelain; but it has been found impossible to properly and thoroughly pack the passageway around the electrodes and extending through the plug when the insulation is made of this material. The porcelain is not sufficiently yielding or elastic to insure that a tight joint or packing shall be attained. It does not fit accurately either the electrodes or the plug against which it bears. Again, the materials of this sort are fragile and are constantly liable to breakage because of the force applied to them by the fierce explosions which take place in the cylinders of explosive, engines. From both these causes (the lack of a perfect packing and the cracking or breaking of the insulators) -there have resulted leakage of the gas or vapors and products of combustion and also a loss of current due to the inferiority of the insulation. These difficulties I have avoided by employing a combined packing and insulating material which is elastic or yielding and capable of being drawn tightly against the electrodes and also against the seat for the packing in the plug or cylinder-wall, such packing and insulating material being provided in masses preferably made up of thin elastic refractory disks or sheets of suitable material, such as mica cut into the form of washers. Preferably these are used in the way above described-that is to say, a suitable number of the refractory washers are placed together to form a gasket.
Claim:
An ignition-plug for gas-engines, having longitudinal chambers each formed with an internal shoulder near its outer end, electrodes passing through said chambers and provided with clamping means or heads, insulating material surrounding the electrodes within said chambers and held against said shoulders, and insulating material at the head of the plug cooperating with the electrodes A o hold the material within said chamber against said shoulders. |
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