US PATENT SUBCLASS 431 / 273
.~ Spark projecter, e.g., flint and abrasive striker, etc.

Current as of: June, 1999
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431 /   HD   COMBUSTION

267  DF  FRICTIONAL, CHEMICAL OR PERCUSSIVE TYPE IGNITER {3}
273.~ Spark projecter, e.g., flint and abrasive striker, etc. {3}
274  DF  .~.~> Mechanical movement operated abrasive member {1}
276  DF  .~.~> Advancing type flint holder
277  DF  .~.~> Mounted on fuel tank adjacent flame holder

DEFINITION

Classification: 431/273

(under subclass 267) Apparatus in which an element and a member having an abrasive surface are rubbed together to project particles heated to igniting temperature by friction.

SEE OR SEARCH CLASS

420, Alloys or Metallic Compositions,

416, for rare earth metal base alloys which are useful for producing sparks, i.e., so-called "flints".

446, Amusement Devices: Toys,

22+, for a spark-producing toy.