Electricity: battery or capacitor charging or discharging – Battery or cell discharging – Regulated discharging
Reexamination Certificate
2000-06-08
2004-07-06
Toatley, Jr., Gregory J. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Battery or cell discharging
Regulated discharging
C307S141000
Reexamination Certificate
active
06759831
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to power saving apparatus for use with battery-operated devices and, more particularly, power saving apparatus that can be inserted between series connected batteries within the battery-operated device to disable the power supply.
BACKGROUND OF THE INVENTION
There are many battery-operated devices that use two or more series-connected batteries. However, many of these battery-operated devices do not have any mechanism for conserving power other than the user turning the device on or off. For example, two “D” size batteries are often used in series in a standard flashlight. Once the flashlight is turned on, the flashlight continues to consume power from the batteries until the user turns off the flashlight. One problem is that the user may forget to turn off the flashlight when finished, or the flashlight may be accidentally turned on when stored in a toolbox, drawer, etc. Of course, many other battery-operated devices (e.g., toys, radios, etc.) are susceptible to this problem.
One solution to this problem is to provide a “smart” device that can monitor the status of the batteries. For example, many devices have a “sleep” mode that turns off the device or reduces the power consumption of the device after a predetermined period of time during which the device was not used or had no activity. However, this solution does not address the problem of existing devices that do not have this capability. Accordingly, there is a need for a power saving apparatus that can be easily and inexpensively retrofitted to existing battery-operated devices.
SUMMARY OF THE INVENTION
In accordance with aspects of the present invention, a power supply disabler that can be retrofitted to a battery-operated device is provided. In one aspect of the invention, the power supply disabler includes a resettable timer, a switch and a pair of electrodes, all of which are fitted in a thin profile case. The case is configured to fit between a pair of series-connected batteries while the batteries are installed in the battery-operated device. In operation, the power saving apparatus is inserted between a pair of batteries of the battery-operated device. Initially, the timer is turned off and the switch is closed so that the power saving device provides a conductive path between the batteries. When the battery-operated device is turned on, the timer is reset and initiated while the switch maintains the conductive path. After a predetermined time period, the timer causes the switch to open-circuit the conductive path, thereby disabling the power supply. Thus, the power supply is prevented from supplying power to the battery-operated device. In one embodiment, the predetermined time period is about twenty minutes. The timer is reset when the battery-operated device is subsequently turned on for the next use.
REFERENCES:
patent: 2360152 (1944-10-01), Nensel
patent: 3535282 (1970-10-01), Mallory
patent: 4249111 (1981-02-01), Gluck
patent: 4623957 (1986-11-01), Moore et al.
patent: 4875147 (1989-10-01), Auer
patent: 5089762 (1992-02-01), Sloan
patent: 5138538 (1992-08-01), Sperling
patent: 5159257 (1992-10-01), Oka et al.
patent: 5173653 (1992-12-01), Hochstein
patent: 5204194 (1993-04-01), Miller et al.
patent: 5469346 (1995-11-01), Haut et al.
patent: 5691619 (1997-11-01), Vingsbo
patent: 6037744 (2000-03-01), Rhodes
patent: 6066899 (2000-05-01), Rund et al.
patent: 59-216428 (1984-12-01), None
patent: 60-39316 (1985-03-01), None
patent: WO 93/18337 (1993-09-01), None
Motorola inc., “Programmable Timer—MC14541B”, 1/94, entire document.*
Microchip Technology Inc., PIC16C5X; EPROM/ROM-Based 8-bit CMOS Microcontroller Series, 2000, see the entire document.
Eldridge John T
Toatley , Jr. Gregory J.
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