Sheath glow plug for rotary piston engines

Details Sheath glow plug for rotary piston engines Sheath glow plug for rotary piston engines

1977-06-27

1979-03-06

Bartis, A.

Electric heating

Heating devices

Resistive element: igniter type

123145A, 219534, 219544, 338218, 338240, 338316, 338333, 361264, F23Q 700, F02P 1902, H05B 348

Patent

active

041432622

ABSTRACT:
A glow plug for rotary piston engines adapted to be mounted in an engine plug hole so as not to project from the plug hole and to be traversed by a flow of fuel-air mixture temporarily trapped in the plug hole. The plug includes an elongated protective tube providing a straight root portion by which it is supported from a plug housing adapted to be inserted in a plug hole. The tube terminates in a closed end hook-shaped free tip portion spaced from the root portion and plug housing and lying in the same plane as the root portion. A helical heater coil is disposed in the protective tube with the pitch of the coil being smaller at the free tip portion than at the root portion so that greater heat is generated in the free tip portion than in the root portion.

REFERENCES:
patent: 1230619 (1917-06-01), Strickler et al.
patent: 1237851 (1917-08-01), Wygodsky
patent: 1474723 (1923-11-01), Levinson
patent: 2130365 (1938-09-01), Paulson
patent: 2506768 (1950-05-01), Bentz et al.
patent: 2533615 (1950-12-01), Osterheld
patent: 2643317 (1953-06-01), Tuttle
patent: 2884920 (1959-05-01), Moule et al.
patent: 3158787 (1964-11-01), Testerini

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