Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1995-11-30
1997-05-13
Mullen, Thomas
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
364707, 395750, H03K 1794, H03M 1100
Patent
active
056296940
ABSTRACT:
A computer is provided with a power provisioning system for connection to an external power source and comprising a main power supply, a standby power supply, and control circuitry that selectively places the system in an ON state in which the main power supply is energised from the external power source and supplies power to main circuitry (C) of the computer, and a STANDBY state in which the standby power supply is energised from the external power source but the main power supply and the main circuitry (C) are de-energised. In order to make it easy for a user to ensure that the main cicuitry (C) is powered up, one of the standard keys of the computer keyboard, for example the space bar key, is provided with an additional set of contacts not associated with the key scanning arrangement of the keyboard. This additional contact set is directly connected to the control circuitry such that following operation of the switch the power provisioning system will reside in its ON state, regardless of its previous state.
REFERENCES:
patent: 4999794 (1991-03-01), Yakushiji
patent: 5237698 (1993-08-01), Ohmae
patent: 5384721 (1995-01-01), Joto
patent: 5457801 (1995-10-01), Aihara
Loison Francois
Simon Jean-Jacques
Edwards, Jr. Timothy
Hewlett--Packard Company
Mullen Thomas
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