Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1975-12-22
1977-03-08
Hickey, Robert J.
Electrical generator or motor structure
Dynamoelectric
Rotary
123148R, 310DIG3, 322DIG5, 324179, F02P 100, H02K 1100
Patent
active
040114767
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 engine, in which case the frequency of the pulsating 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 integrated circuit mounted in a nonmagnetic 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 integrated circuit. The number of vanes corresponds to the number of cylinders in the internal combustion engine, and the vanes come into and go 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 aforementioned DC pulsating voltage signal.
REFERENCES:
patent: 3018395 (1962-01-01), Carlstein
patent: 3258550 (1966-06-01), Guetersloh et al.
patent: 3715650 (1973-02-01), Draxler
patent: 3783314 (1974-01-01), Kostan
Brown Robert W.
Ford Motor Company
Hickey Robert J.
Zerschling Keith L.
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