Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1989-09-08
1991-01-22
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
200 6153, 335205, H01H 3514
Patent
active
049872761
ABSTRACT:
A deceleration switch comprising a support member, a permanent magnet mounted on the support member and displaceable from a first position to a second position by inertia caused by a predetermined deceleration of the support member, a spring mounted on the support member for biasing the permanent magnet toward the first position, a set of electrical contacts mounted on the support member and operable to close under the influence of the magnetic field of the permanent magnet when the permanent magnet is in the second position and an inductive device energized to produce a second magnetic field enhancing the magnetic field of the permanent magnet thus causing the contacts to remain closed for a longer period of time upon return of the permanent magnet to its first position under the biasing action of the spring.
REFERENCES:
patent: 3795780 (1974-05-01), Lawrie
patent: 4705922 (1987-11-01), Seeger et al.
patent: 4873401 (1989-10-01), Ireland
patent: 4877927 (1989-10-01), Reneau
Bader Heinz
Sterler Georg
Audi AG
Scott J. R.
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