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US 5,854,457 AGranted
Tilting on-off switch
OwnerKikuyoshi Nishikawainventor
Life of this patent
Estimating the term…
Abstract
A tilting ON-OFF switch is made up of a pair of fixed contact pieces placed on the bottom of a columnar cavity defined by a housing and a cap and spaced a predetermined distance apart in the circumferential direction, a movable contact piece having plural tongues radially extending therefrom at a pitch smaller than a spreading angle of a fan-shaped or sectorial area of each of the fixed contact pieces for contact therewith, and a movable truncated-conical weight in the housing attached coaxially to the movable contact piece.
Claims10
A tilting ON-OFF switch for detecting overturning, comprising:
- a cylindrical housing containing a cylindrical side wall and a bottom frame closing a lower end of said cylindrical side wall to define a columnar cavity in the housing;
- a pair of fixed contact pieces located in a lower end portion of said cavity in a plane perpendicular to a center axis of said cavity and opposed from one another across said axis, said pair of fixed contact pieces respectively having portions that extend through said cylindrical side wall of said housing to form terminals exterior to said housing;
- a weight movably received on said pair of fixed contact pieces in said cavity, said weight having a substantially truncated-conical portion whose diameter gradually decreases in an upward direction;
- and
- a movable contact piece formed of sheet metal, said movable contact piece being fixed to an underside of said weight concentrically therewith and extending over said pair of fixed contact pieces, said movable contact piece having plural tongues arranged along a circle of a diameter smaller than a maximum diameter of said weight and bent downward, tips of said tongues being arranged along a circle having a diameter smaller than said maximum diameter of said weight.
2 more elements
Dependencies are inferred from the claim text.