F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.2
F02P 3/00 (2006.01) F02P 7/07 (2006.01)
Patent
CA 1076194
ABSTRACT A signal generating mechanism for producing a pulsed DC electrical voltage signal having a frequency proportional to the angular velocity of a rotating shaft. The signal generating mechanism may be used in the distributor of a breakerless ignition system for a multi-cylinder internal combustion engines in which case the frequency of the pul- sating voltage signal is equal to the rate at which ignition sparks are to be generated. The signal generating mechanism includes a baseplate and a bushing through which the rotating shaft passes. A stator assembly is formed by a hub and lower and upper plates affixed thereto, the stator assembly being rotatable about the bushing and further including at least one Hall effect sensor and intergrated circuit mounted in a non- magnetic supporting structure secured to the upper plate. A permanent magnet also is attached to the supporting structure and is radially spaced from the Hall effect sensor and integrated circuit. A rotor assembly is attached to the shaft and has depending vanes extending into the space between the permanent magnet and the Hall effect sensor and intergrate circuit. The number of vanes corresponds to the number of cylinders in the internal combustion engine, and the vanes come into and ?o out of alignment with the permanent magnet and the Hall effect sensor and integrated circuit. This produces a switching action in the integrated circuit through the action of the Hall effect sensor and results in the afore- mentioned DC pulsating voltage signal. - 2 -
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