Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1993-09-20
1995-01-03
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
200 6145M, 200 6148, 200 6152, 335205, H01H 3514
Patent
active
053788656
ABSTRACT:
A housing has a vertical subframe in which is mounted one or more reed switches. A magnet is mounted to a carriage which is mounted about the reed switch by a two-degree-of-freedom joint. The carriage forms a cup with a base aperture which surrounds the subframe. The aperture defines a semi-spherical surface which rides on a semi-spherical surface at the base of the subframe. A shell is fixed to the housing and the inside surface of the shell has a semi-spherical surface concentric with the semi-spherical surfaces defined by the annulus of the aperture and the semi-spherical base of the subframe. The carriage has semi-spherical surface portions which engage the shell interior and is thereby constrained to rotate about the point of concentricity common to the shell, the carriage, the annular aperture, and the semi-spherical base of the subframe. The carriage is biased to an upright position by springs which extend between the base of the housing and an upper lip of the carriage. When the shock sensor experiences an acceleration in any direction perpendicular to the axis defined by the central reed switch, the magnet acts as an acceleration sensing mass and reacts to the acceleration, causing tilting of the carriage which moves the magnet into a position that causes the reed switch to close.
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patent: 5194706 (1993-03-01), Reneau
patent: 5212357 (1993-05-01), Reneau
Hamlin, Inc.
Scott J. R.
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