Velocity change sensors

Details Velocity change sensors Velocity change sensors

1989-12-21

1991-04-23

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6148, 200 6151, 335206, 335205, H01H 3514

Patent

active

050102168

ABSTRACT:
Various embodiments of sensors are disclosed which contain an inertial mass that is magnetically biased to an initial position. In response to a certain deceleration, the mass is caused to swing about an axis and operate a switch. In some embodiments, the switch is one that is held open by the inertial mass' presence in its initial position and closes when the inertial mass swings away from its initial position, while in other embodiments it is one whose contacts are bridged by a conductive portion of the inertial mass only after the inertial mass has been displaced from its initial position, while in still other embodiments it is a reed switch that is magnetically operated. Motion of the inertial mass can be undampened or dampened. If dampening is desired, it can be accomplished either pneumatically or electromagnetically.

REFERENCES:
patent: 2508961 (1950-05-01), McNerney
patent: 2802204 (1957-08-01), Kennelly et al.
patent: 3725896 (1973-04-01), Wagner
patent: 3778572 (1973-12-01), Matsui et al.
patent: 3840088 (1974-10-01), Marumo et al.
patent: 3898400 (1975-08-01), Takada
patent: 4636603 (1987-01-01), Pliml
patent: 4827091 (1989-05-01), Behr
patent: 4873401 (1989-10-01), Ireland

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