Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB33221A
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Priority to GB33221ApriorityCriticalpatent/GB172873A/en
Publication of GB172873ApublicationCriticalpatent/GB172873A/en
H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
H01T13/00—Sparking plugs
H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
H01T13/32—Sparking plugs characterised by features of the electrodes or insulation characterised by features of the earthed electrode
Landscapes
Spark Plugs
(AREA)
Abstract
172,873. Pickard, W., and Dobson, D. R. Jan. 5, 1921. Sparking-plugs. - Plugs of the type in which the insulation forms a piston which slides within the casing so as to leave the requisite sparkgap at the end of the compression stoke are provided with annular recesses b<1> and projections a<1> in the gland b and insulation a respectively. Gas tightness may be further ensured by the provision of piston-rings between the insulator and casing as described in Specification 153,512.
GB33221A1921-01-051921-01-05Improvements in or relating to ignition devices for internal combustion engines and the like
ExpiredGB172873A
(en)