Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1996-09-19
1997-12-30
Wong, Peter S.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
368204, H01M 1046, G04C 300
Patent
active
057034605
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention is directed to a watch or clock battery charging system not requiring the cover to be taken off.
The technical field of this patent is that of watches or clocks, particularly digital and analogical wristwatches or clocks which are powered by a button type battery, combined with battery chargers, particularly button battery chargers. This system is applicable to other types of devices which work with said type of batteries or similar.
Statement of the prior state of the art ESP91011267 for a circuit and device for recharging electrical batteries and other specific use which constitutes a specific invention for recharging batteries, particularly useful for recharging button batteries. Also ESP9400027/1 for charging electrical batteries carries out the function of charging button batteries through a voltage drop maintaining the amperage through the voltage differential, specially suitable for the purpose set forth in this patent, as this charging system does not damage the mechanism of the watch to which the battery is connected.
Until now, the recharging of button batteries turned out to be impossible, as the charging systems previously known of prevented the charge from being accepted, and even brought about the explosion of said button batteries on occasions.
Furthermore the watches which have a button type battery all have the common characteristic of these being replaced by opening the cover.
The duration of the battery is fairly long. Nevertheless, when a watch is opened, damp, dust and, definitively, dirt enter the watch with consequent deterioration of the initial conditions of the same. For this reason the ideal solution would be to have a watch which is never opened.
This is difficult in mechanical watches which break down, though theoretically they never need to be opened for them to work, but it becomes impossible in electronic watches, in which the power source is inside them.
OBJECTS AND SUMMARY OF THE INVENTION
This invention proposes a watch or clock battery charging system that does not require the cover to be taken off, based on the possibility of recharging button type batteries without needing them to be taken out.
Another problem which can be understood to exist in these conditions is that during the recharging process the watch or clock could undergo an overload which might damage one of its tiny circuits. Nevertheless, this does not occur with the type of charge applied to said watches or clocks so that even when these have stopped through lack of power, at the initial contact they start again with the full accuracy of each particular watch or clock, and after the charging time, these could never stop at all if the recharging is done at sufficiently regular periods, such as every year, or every two years, according to the capacity of the battery.
In watches which only withstand fresh water, the external contacts can be outside to facilitate the charging contact, with these being of any kind. Nevertheless, in those designed to be submerged in salt water one has to prevent the electrolytic contact of water with salts dissolved in this, so that the contact should in this case be able to be insulated from water contact, as otherwise the battery could wear out quickly, through the resistant closure of the circuit.
This invention thus envisages insulation systems which involve the protection of the positive pole of the circuit, the negative one being the casing of the watch itself, or a circuit similarly able to be insulated if suitable on the other side of the watch, with a contact access incompatible with the positive one. All of this does not prevent one of the buttons from being used for activation as a connection for a possible charging clip.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to make the following explanation clearer, two sheets of drawings are enclosed which in the figures represent the essence of this invention as an example.
FIG. 1 shows a perspective view of an open watch.
FIG. 2 shows a plan view of the same watch.
FI
REFERENCES:
patent: 4118922 (1978-10-01), Ichiyanagi
patent: 4323996 (1982-04-01), Ganter
patent: 4873677 (1989-10-01), Sakamoto et al.
Goldberg Richard M.
Law Patrick B.
Wong Peter S.
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