Electrophoresis apparatus having an electric controller

Details Electrophoresis apparatus having an electric controller Electrophoresis apparatus having an electric controller

1999-05-20

2001-05-15

Tung, T. (Department: 1743)

Chemistry: electrical and wave energy

Apparatus

Electrophoretic or electro-osmotic apparatus

C204S600000

Reexamination Certificate

active

06231740

ABSTRACT:

TECHNICAL FIELD
The present invention relates to a simplified electrophoresis apparatus which is used for fixing, retrieving and refining samples extracted from living bodies in analyses of DNAs and proteins by the electrophoresis which is widely utilized as a basic technique for molecular biology, biochemistry and clinical chemistry.
BACKGROUND ART
An electrophoresis apparatus disclosed by Japanese Utility Model Application Laid-Open No. 63-39639 is known as a conventional simplified electrophoresis apparatus. This electrophoresis apparatus is composed only of fuses, rectifier means and, switches which are used for starting and stopping operations and changing output waveforms, and is capable of supplying an electric current in accordance with impedance of an electrophoresis carrier.
However, the electrophoresis apparatus disclosed by the invention mentioned above is connected directly to a universal AC power source such as a domestic AC 100 V power source and may possibly allow an electric current having a large capacity to be supplied when impedance of an electrophoresis carrier is abruptly lowered or a member of the electrophoresis apparatus is shorted.
Though an electric current having such a large capacity is remarkably hazardous to human bodies, the electrophoresis apparatus provides electric insulation only by breakage of built-in fuses and a protective function of a casing which accommodates electronic circuits. Accordingly, users must always pay attentions to deterioration of mechanical structure of switching means caused due to frequent operations or long-term use and adhesion of splashed electrophoretic gels to the operating switches. Speaking of an electric current allowed for the fuse, on the other hand, the electrophoresis apparatus restricts circuit currents only within a limit since it must allow electric currents required for experiments, thereby requiring elaborate cares for handling and posing extremely serious problems for practical use.
DISCLOSURE OF THE INVENTION
It is therefore a primary object of the present invention to provide a simplified electrophoresis apparatus which can be operated stably without imposing excessive burdens on users, configured compact and light in weight, and carry out electrophoresis as excellently as the conventional apparatus.
For accomplishing this object, the simplified electrophoresis apparatus according to the present invention is configured as an apparatus which comprises rectifier means for rectifying and outputting an AC current from a universal AC power source, an electrophoresis cell, and an electric controller for applying an electric output from the rectifier circuits to a carrier disposed in the electrophoresis cell, wherein the electric controller comprises control means capable of indirectly controlling a driving section which controls the electric output from the rectifier circuit in accordance with external inupts so as to constitute a safe interface which allows electrophoresis to be carried out as desired with less deterioration of the driving section which directly controls electrophoresis outputs so that the electrophoresis apparatus can be used stably.
Speaking of a structure of the simplified electrophoresis apparatus according to the present invention, the electric controller is configured so that it cannot be connected or energized so long as the electrophoresis cell is not protected with a cover, and the cover for the electrophoresis cell is configured so as to have a semicylindrical or semispherical surface for preventing water drops from adhering to an observation surface located on a top surface of the cover to facilitate observation and a ventilation structure having ventilation holes formed in the cover for preventing it from being dimmed.


REFERENCES:
patent: 3906293 (1975-09-01), Meshbane et al.
patent: 5055172 (1991-10-01), Cathel et al.

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