Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1990-02-22
1991-07-23
Wityshyn, Michael
Typewriting machines
Typing by other than type-face or type-die
Thermal
101288, 156384, 156DIG49, 307 25, 307 66, 364187, B65C 946, B65C 1102
Patent
active
050338820
ABSTRACT:
Circuitry including a first and second source of electrical energy provides a continuous supply of electrical energy to a volatile memory circuit utilized within an electrical apparatus. The circuitry includes an on and off switch and allows for the first source of electrical energy to be supplied to the volatile memory when the switch is both in an on and off position. The secondary source of electrical energy is only used to supply electrical energy to the volatile memory when the first souce of electrical energy is either inoperative or disconnected from the circuit. Such circuitry allows for conservation of power of the second source of electrical energy which in some electronic apparatus may include a lithium battery that may be relatively difficult to replace.
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Bain James M.
Vanderpool James L.
Monarch Marking Systems, Inc.
Wityshyn Michael
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