Richmond Palladium (Daily), Volume 44, Number 226, 5 July 1919 — Page 7

FEB

UtiZ F.I'JilluCKiJ r'AUT.-ATTOf? iOTT? SL-TEL-iKAii, SATURDAY, JULY 3, 1919.

EGMXION

the Motor Woi

THE GUARANTEE This plug is guaranteed to operate under adverse conditions, such as excess oil, rich gasoline mixture, and moisture, .without fouling. The porcelain is guaranteed not to crack or break from heat, as the insulator or porcelain core is protected by the conical shell from heat, oil, soot, carbon and moisture. The Foul Proof Spark Plug Co.

The Air-Cooled Foul Proof Plug

he air cooled plug ca n be used

( in any motor, if desir ad, it is es

pecially recommended for hard service. Where a plug is subject to intense heat, as in trucks, tractors, motorcycles, racing :ars, motor boats, aeroplanes, or any pleasure car requiring a plug to be used for Ineavy duty service. 1"

A Richmond Invention is the "The Foul Proof Spark Plug'

THE FOLLOWING IS A COMPLETE DESCRIPTION:

The Conical shell which is carried on and is a part of the center electrode, when secured in place in the porcelain core, leaves a space between the top or large and of the concial shell and the lower end of the outside shell which is the spark gap. This gap being adjusted to any desired width by removing the terminal nut and the hex electrode nut, the conical shell and the electrode bar can be removed from plug. The electrode bar carries thin copper washers on the top portion which fits on the small or upper portion against shoulder or between shoulder on electrode bar and porcelain, by removing one or more of these washers narrows the gap, placing one or more of these washers widens the gap. Extra washers for this adjustment are carried under or between the electrode bar nut and top of porcelain. The corneal shell or lower portion of the electrode protects the porcelain from heat, moisture, carbon and oil, thus allowing this plug to operate under adverse conditions. In practice this spark will occur at but one point which would be the point of least resistance, but as the circumference of the rims forming the spark gap are susceptible to forming a spark, it is evident that the location xf the spark is susceptible of change from one point to another thereby permitting a wide latitude of spark surface before it would become inoperative and the change of position of the spark would tend to clean another point which had previously become foul. Any oil that would be thrown upon the spark plug cannot possibly adhere to anything but the conical shell which is evidence that it would run down to the end or point of the conical shell and drop off before the following explosion, in case any oil should cling to the conical shell, the pressure of the folio wine: explosion against the oil on the conical shell will force the oil away from the plug. It is also evident that the inside of the outer sh will form a comparatively large chamber whereby when explosion occurs in the combustion chamber the pressure thereof will raise a pressure in the spark plug chamber equal to that in the combustion chamber, when the pressure in the combustion chamber is instantly released, it is evident that the excess pressure in the spark plug chamber will equalize itself by forcing itself out through the spark gap, thereby tending to cleanse and cool the lips or rims forming the spark gap which enable this plug to function under adverse conditions.

The Foul Proof" the Universal Spark Plug

6. The porceksin core will not crack as it is protected from heat. 7. The spark gap is adjustable to any desired width. 8. It will not pre-ignite, as the lips forming the spark gap in the concial shell are kept cool from the

park Pin

rers of the SPARK PLUG" ERS, Manager

uto Station, 1113-1115 Main Street, Richmond, Ind.

pressure in the air chamber in the plug. 9. Carbon will never form an arc across the spark gap, as the pressure when released from the air chamber expels from the spark gap the deposit of carbon after each explosion.

Co.

PAGE NINE

fir ' i igjfr hr--T-J

ii i n

fW 1 IPl