Copper-based sintered alloy electrode for use in ignition distri

Details Copper-based sintered alloy electrode for use in ignition distri Copper-based sintered alloy electrode for use in ignition distri

1992-04-01

1993-12-14

Scott, J. R.

Electricity: circuit makers and breakers

Periodic

Contact breaker detail

200 19DC, 200266, H01H 1900, H01H 100, F02P 702

Patent

active

052705013

ABSTRACT:
An electrode for an ignition distributor of an internal combustion engine is disclosed which is made of a copper-based sintered alloy. The alloy contains a copper matrix, and grains of Al.sub.2 O.sub.3 having an average grain size of 10 to 100 .mu.m. The Al.sub.2 O.sub.3 grains are dispersed uniformly in the copper matrix at a ratio of from 45 to 60 percent by surface area as measured in an arbitrary cross-section. The electrode of this construction exhibits very low capacitive-discharge current peaks and starting voltages, and hence the generation of radio wave noise can be substantially eliminated.

REFERENCES:
patent: 4007342 (1977-02-01), Makino et al.
patent: 4091245 (1978-05-01), Komiyama et al.
patent: 4217470 (1980-08-01), Kirner
patent: 4270266 (1981-06-01), Lanzi et al.
patent: 4565907 (1986-01-01), Takahashi et al.
patent: 5134257 (1992-07-01), Oka et al.

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