Electricity: circuit makers and breakers – Multiple circuit control – Reciprocating contact
Patent
1995-06-07
1997-03-18
Spyrou, Cassandra C.
Electricity: circuit makers and breakers
Multiple circuit control
Reciprocating contact
200 5A, 200 501, 200 617, 200 6178, H01H 1314, H01H 316
Patent
active
056125208
ABSTRACT:
A suspend (sleep) switch for a portable electronic device, such as a notebook computer, is mounted on a printed circuit board. The suspend switch includes a first contact which is positioned in juxtaposed relationship with a second contact. The contacts are formed from an electrically conductive metal or other electrically conductive material which is sufficiently resilient to support an actuator and to hold the two contacts apart in normal operation. In addition, the resiliency of the two contacts allows the two contacts to adjust to different distances between the printed circuit boards on which the contacts are mounted and the cover of the electronic device which constrains the actuator. When the cover of the electronic device is closed, the actuator pushes the two contacts into electrical contact, preferably with a wiping motion, to provide an electrical connection which can be sensed by circuitry on the printed circuit board. The contacts are mounted so that the contacts can accommodate a wide range of overtravel of the actuator. On the other hand, the amount of pre-travel required to engage the contacts (i.e., close the switch) is predetermined by a pair of projections extending from the cover of the electronic device, and the pre-travel can be held to close tolerances to assure that the switch is closed each time the cover of the electronic device is closed.
REFERENCES:
patent: 2469650 (1949-05-01), Isserstedt
patent: 4556765 (1985-12-01), Shaw et al.
patent: 4605830 (1986-08-01), Reid
patent: 4694130 (1987-09-01), Kitzmann et al.
patent: 5077551 (1991-12-01), Sattols
Toedtman Thomas
Tusan Robert D.
AST Research Inc.
Friedhofer Michael A.
Spyrou Cassandra C.
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