Pulse keyboard switch

Details Pulse keyboard switch Pulse keyboard switch

1974-11-18

1976-02-10

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 30, H02K 3506

Patent

active

039379922

ABSTRACT:
The switch includes an annular permanent magnet, a plate of soft magnetic material at one side of the magnet, a stationary electric coil at the opposite side of the magnet, and an unrestrained free-flying member of soft magnetic material coaxial with magnet and coil and movable axially in them toward and away from the plate. It normally is held by keeper means in a rest position away from the plate, but means are provided movable relative to it for first engaging and then pushing it toward the plate until the magnetic attraction between the magnet and the free-flying member causes that member to fly from the pushing means to the plate at high velocity. This creates a rapid change in flux in the free-flying member and produces a voltage pulse in the coil.

REFERENCES:
patent: 3065366 (1962-11-01), Speiser et al.
patent: 3130332 (1964-04-01), Zehfeld et al.
patent: 3132268 (1964-05-01), Abel et al.
patent: 3153735 (1964-10-01), Branagan et al.
patent: 3398302 (1968-08-01), Harnau et al.
patent: 3693033 (1972-09-01), Troesly
patent: 3718828 (1973-02-01), Britton et al.
patent: 3774058 (1973-11-01), Abel

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