Electrical transmission or interconnection systems – Switching systems – Switch actuation
Patent
1997-09-25
1999-03-23
Paladini, Albert W.
Electrical transmission or interconnection systems
Switching systems
Switch actuation
200 4301, 200 5001, H01H 7110
Patent
active
058864261
ABSTRACT:
A power switch locking device for controlling the on/off function of a soft touch type power switch is disclosed. In general, the output of the power switch is provided to an input of a microcontroller that switches on/off the main power switch or relay of the microcontroller in response to the signal level provided by the power switch. The power switch locking device of the invention cooperates with a function switch or key specified in the electrical appliance to control the on/off function of the power switch. Also, the function switch is of the soft touch type producing a momentary switch-on output signal when the switch is pressed. A switching control circuit is provided for receiving the output signals from the power switch and function switch, and for producing a control output signal capable of inverting its logical level state whenever the same level output signals from the power switch and function switch are inputted. Further included is an analog switch responsive to the control output signal level of the switching control circuit to connect the signal output of the power switch to, or disconnect it from, the power switch signal input of the microcontroller. In addition, a switch signal source is provided on the output side of the analog switch for generating a power switch signal that corresponds to the off state when the analog switch is in the disconnect or cut off state. Thus, the power switch is placed into a locked state when the power switch and the function switch are pressed simultaneously. During the locked state, the function of the power switch is disabled. Further, the power switch returns to the normal state when the power switch and the function switch are pressed again simultaneously. Thus, locking/unlocking the on/off function of the power switch is possible by pressing the power switch and one of the specified function switches.
REFERENCES:
patent: 4002956 (1977-01-01), Minor et al.
patent: 4068276 (1978-01-01), Pintell
patent: 4095067 (1978-06-01), LaScola
patent: 4314307 (1982-02-01), Sivahop et al.
patent: 4362954 (1982-12-01), Cotton
patent: 4559456 (1985-12-01), Yamamoto et al.
patent: 4642753 (1987-02-01), Easthill
patent: 4689492 (1987-08-01), Peteuil
patent: 5070219 (1991-12-01), Grosskrueger et al.
patent: 5193665 (1993-03-01), Jankow
patent: 5196731 (1993-03-01), Abe et al.
patent: 5293011 (1994-03-01), Mokert
patent: 5338218 (1994-08-01), Haas
patent: 5432387 (1995-07-01), Kogure et al.
patent: 5434368 (1995-07-01), Hoffmann
patent: 5734206 (1998-03-01), Keizer et al.
Bushnell Esq Robert E.
Paladini Albert W.
Samsung Electronics Co,. Ltd.
LandOfFree
Power switch locking device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power switch locking device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power switch locking device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2129151