Electrical transmission or interconnection systems – Plural load circuit systems – Plural sources of supply
Reexamination Certificate
1998-10-23
2001-01-16
Paladini, Albert W. (Department: 2836)
Electrical transmission or interconnection systems
Plural load circuit systems
Plural sources of supply
C361S721000, C361S748000, C710S108000
Reexamination Certificate
active
06175165
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to electronic equipment to which peripheral equipment is connected for cooperative system operations.
BACKGROUND OF THE INVENTION
The market is replete with electronic equipment to which peripheral equipment is connected for cooperative action. The personal computer is one example of equipment to which peripheral equipment such as a FAX/modem and a LABEL scanner are connected for communication purposes. Another example is the television set to which a video cassette recorder (VCR) is connected; another, a stereo system. A tape drive, which might be connected to any of the above hosts, is a particularly familiar peripheral. Each piece of peripheral equipment is connected separately to an in-the-wall socket for power, as well as to the host, leading to a tangle of cords characteristic of any PC installation, stereo system or video system.
The peripherals often require different voltage levels for operation. Thus, five volt, nine volt, and 12 volt requirements are not uncommon. Consequently, not only are the power cords common but they typically also require transformers. The transformers, in turn, not only further complicate the tangle of cords, but they also are expensive and not entirely reliable. Most individuals with systems of this type often find themselves complaining about the mess of wires providing further impetus for the significant effort now being expended to develop wireless communication links between components. But still the tangle of power cords and transformers remains.
BRIEF DESCRIPTION OF THE INVENTION
The invention is based on the recognition that host equipment such as a personal computer, a television set or a stereo tuner has an internal power supply and a voltage regulator which already provides low voltage requirements for internal components and can be adapted to permit the requisite low voltage power to be supplied for the peripheral equipment directly from the host equipment rather than separately through transformers to an in-the-wall supply. In this manner, the tangle of cords, characteristic of such systems, is considerably simplified. To this end, provision is made in the housing of the host to provide a socket, or sockets, to which a peripheral piece of equipment can be connected for receiving directly from the host the low voltage power it requires. The socket(s) are connected electrically to the outputs of the internal power supply (or regulator) of the host for providing the low voltage needed to power the peripheral. In one embodiment, the power supply is mounted on the rear face of the computer. In another embodiment, the power supply is internal with a DC power cable connected to a slot at the rear face of the computer providing for at least one DC socket there.
REFERENCES:
patent: 5497495 (1996-03-01), Ishikawa et al.
patent: 5777397 (1998-07-01), Lam
patent: 5991839 (1999-11-01), Ninomiya
A M Group, Corp
Paladini Albert W.
Shapiro Herbert M.
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