초록 ▼

In a magnet stirring apparatus comprising a base which includes a plurality of magnet coils and onto which respective vessels can be placed, said vessels being made of a non-magnetic material and each containing a magnetic stirring bar as well as the liquid to be stirred, the stability of the stirri

In a magnet stirring apparatus comprising a base which includes a plurality of magnet coils and onto which respective vessels can be placed, said vessels being made of a non-magnetic material and each containing a magnetic stirring bar as well as the liquid to be stirred, the stability of the stirring operation within a wide range of lengths of stirring bars and of adjusted rotational speeds is achieved by pole shoes which are long straggling in the radial direction toward one center.

대표청구항 ▼

A magnetic stirring apparatus comprising: a base for supporting a vessel containing a magnetic stirring bar and liquid to be stirred; electromagnet means having: poles located opposite each other in a plurality of pairs; exciting coils; and, means for feeding current to said exciting coils for produ

A magnetic stirring apparatus comprising: a base for supporting a vessel containing a magnetic stirring bar and liquid to be stirred; electromagnet means having: poles located opposite each other in a plurality of pairs; exciting coils; and, means for feeding current to said exciting coils for producing a magnetic field of variable magnitude at the individual poles; a plurality of pairs of pole shoes, each pole shoe having first and second pole shoe ends and an intermediate portion wherein each first pole shoe end is connected to a corresponding pole located in a first plane; and, each intermediate portion extends radially, inwardly and upwardly from its associated first pole shoe end to its associated second pole shoe end; each of said second pole shoe ends being separated from adjacent pole shoe ends by a narrow gap and located in a plane above the plane of its associated first pole shoe end; said pole shoes thereby extending radially inwardly from said poles and toward a common center so that all of said second pole shoe ends are located in substantially the same plane as the upper side of said base.