Miniature acceleration switch

Details Miniature acceleration switch Miniature acceleration switch

1991-03-18

1992-07-28

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6153, H01H 3514

Patent

active

051342553

ABSTRACT:
This miniature normally open circuited acceleration switch has a hollow cylindrical casing closed at one end. Its other end is closed by a header having an insulated axial lead wire extending inwardly of the casing, and an electrically conductive ring secured peripherally to the casing. Inside the casing is an internally conical guide sleeve in which is a freely rollable massive ball. A lightweight cup-shaped piston in the guide sleeve carries a contact member spaced by an expanded coil spring from the lead wire. The ball impinges on the piston when a sufficient axially directed force of acceleration is applied to the casing, even if a simultaneous laterally directed force of acceleration is applied thereto. The piston moves axially against the spring bias such that the contact member contacts the lead wire to close the normally open circuited switch.

REFERENCES:
patent: 3300603 (1967-01-01), Wakely
patent: 3657500 (1972-04-01), Gawlick et al.
patent: 4746774 (1988-05-01), Tetrault et al.
patent: 4789762 (1988-12-01), Miller et al.
patent: 4916266 (1990-04-01), Tetrault

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