Electrical generator or motor structure – Dynamoelectric – Reciprocating
Patent
1973-07-13
1976-10-05
Duggan, Donovan F.
Electrical generator or motor structure
Dynamoelectric
Reciprocating
310 30, H02K 3502
Patent
active
039847071
ABSTRACT:
A linear signal generator, that is one operating axially as opposed to a rotating generator comprises a housing, an annular electric coil mounted about the longitudinal axis of the housing, a permanent magnet resiliently mounted for movement along the longitudinal axis of the housing through the annular coil, and means for removably latching the magnet at one end of the housing. The magnet is preferably resiliently mounted to a plunger which is depressible a sufficient amount to cause the magnet to pass into the coil and latch at the opposite end of the housing, such as by a magnetic latch. When the latching force is overcome, such as by release of the biased plunger having a biasing force in excess of the magnetic latching force, the magnet is rapidly axially propelled through the electric coil to a rest position at the opposite end of the housing where the cycle may again be repeated. The rapid passage of the magnet through the coil changes the flux of the magnetic field within the coil and causes the generation of a voltage which is proportional to the speed of movement of the magnet through the coil. The magnetic latch may comprise a magnetically permeable material, such as iron having an aperture therein which is sized to provide the maximum desirable latching force by reducing the area of the magnetically permeable material by a desired amount.
REFERENCES:
patent: 2764020 (1956-09-01), Gadd
patent: 3130332 (1964-04-01), Zehfeld et al.
patent: 3132268 (1964-05-01), Abel et al.
patent: 3398302 (1968-08-01), Harnau et al.
patent: 3693033 (1972-09-01), Troesh
patent: 3718828 (1973-02-01), Brittou et al.
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