Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Reexamination Certificate
2008-01-08
2008-01-08
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
C200S181000
Reexamination Certificate
active
10490858
ABSTRACT:
A micro-switch comprises at least one coil (22) of elongate electrically conductive material mounted on the support means (16). A movable actuator portion (20) of electrically conductive material is attached to the support means (16) so as to be movable against resilient means (10) of the micro-switch and so as to be adjacent to the coil (22). Pulse inductive circuitry (30, 32, 34, 36, 43a, 52, 54) is connected to the said at least one coil (22), and constructed to switch from one condition to another when the actuator portion (20) is moved against the force of the resilient means (10) beyond a predetermined threshold point as indicated by pulsoinductive monitoring effected by the pulse inductive circuitry (30, 32, 34, 36,43a, 52, 54). As a result of this construction, there are no physical contacts which are brought into and out of contact with one another to effect the change in the electrical condition of the micro-switch.
REFERENCES:
patent: 3719902 (1973-03-01), Esterly
patent: 4425511 (1984-01-01), Brosh
patent: 5327030 (1994-07-01), DeVito et al.
patent: 6124650 (2000-09-01), Bishop et al.
patent: 6608268 (2003-08-01), Goldsmith
patent: 2003/0107460 (2003-06-01), Huang
patent: 2004/0218341 (2004-11-01), Martin et al.
patent: WO 00/25093 (2000-05-01), None
Clark & Brody
Donovan Lincoln
Rojas Bernard
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