초록 ▼

A reaction block for mounting various round bottom flasks upon a laboratory, magnetic hot plate stirrer. An aluminum inner flask holder effectively conducts heat and does not interfere with a magnetic flux. A solid heat insulating material substantially surrounds and is spaced from the flask holder,

A reaction block for mounting various round bottom flasks upon a laboratory, magnetic hot plate stirrer. An aluminum inner flask holder effectively conducts heat and does not interfere with a magnetic flux. A solid heat insulating material substantially surrounds and is spaced from the flask holder, in order to keep the reaction block at a safe temperature and provide easy gripping surface regions that extend completely around its circumference.

대표청구항 ▼

I claim: 1. A reaction block for mounting a flask upon a laboratory hot plate stirrer, essentially comprising an inner flask holder, of a heat conducting material that comprises a non-ferrous metal and does not interfere with a magnetic flux, with a holder above a horizontal element that has a lowe

I claim: 1. A reaction block for mounting a flask upon a laboratory hot plate stirrer, essentially comprising an inner flask holder, of a heat conducting material that comprises a non-ferrous metal and does not interfere with a magnetic flux, with a holder above a horizontal element that has a lower surface adapted to engage upon a hot plate surface and a heat shield that comprises a heat insulating material that substantially surrounds exterior side and upper surfaces of the inner flask holder and is separated from those exterior side and upper surfaces by an air space, in order to define an exterior surface area of the reaction block that can be maintained at a temperature that is safe to touch when mounted on said hot plate. 2. A reaction block according to claim 1, wherein the non-ferrous metal is aluminum and the air space which substantially separates exterior side and upper surfaces of the inner flask holder from the surrounding heat insulating material is defined by spacers of a heat insulating material that are positioned at a plurality of locations on an upper surface of the horizontal element of the inner flask holder. 3. A reaction block according to claim 2, wherein fasteners connect the inner flask holder to the surrounding heat insulating material, and a fastener extends through a spacer in at least one location and engages the horizontal element. 4. A reaction block according to claim 1, wherein the heat insulating material comprises a single insulating block of a plastic or resin that is substantially circular and substantially surrounds exterior side and upper surfaces of a horizontal element that is circular, and the insulating block further comprises a vertical outer surface with gripping surface regions completely around its circumference. 5. A reaction block according to claim 4, wherein the single insulating block further comprises a rigid PTFE resin and air spaces separate outer surfaces of the inner flask holder from inner surfaces of the single insulating block of rigid PTFE resin. 6. A reaction block according to claim 5, wherein the gripping surface regions on the single insulating block of rigid PTFE resin are defined by a least one continuous groove, completely around its circumference. 7. A reaction block according to claim 5, wherein the air spaces are defined by spacers of a heat insulating material that are positioned between the insulating block and inner flask holder at a plurality of locations on an upper surface of the horizontal element of the inner flask holder. 8. A reaction block according to claim 7, wherein fasteners connect the inner flask holder to the surrounding single insulating block of rigid PTFE resin, and at least one fastener extends through a spacer in at least one location and engages the horizontal element. 9. A reaction block according to claim 1, wherein the inner flask holder further comprises a concave, central recess that is adapted to accept each of a series of inserts sized with upper concave surfaces that will accommodate different round bottom flasks wherein each insert has a common convex lower surface that will make good heat transfer contact with the concave, central recess. 10. A reaction block according to claim 9, wherein the inner flask holder further comprises a concave recess located in the top of a cylindrical aluminum element positioned above a circular thin wall aluminum horizontal element, and the insulating material further comprises an insulating block having inner surfaces spaced around the cylindrical aluminum element and above the horizontal element. 11. A reaction block according to claim 10, wherein interconnected air spaces are defined between outer surfaces of the inner flask holder and inner surfaces of the insulating block and the insulating block comprises an outer surface with an annular portion that further comprises gripping surface regions around its outer circumference. 12. A reaction block according to claim 11, wherein the insulating block further comprises a rigid PTFE resin, the interconnected air spaces are further defined by a plurality of spacers, between the insulated block and the inner flask holder, and the gripping surface regions further comprise at least one continuous groove, completely around its outer circumference. 13. A reaction block according to claim 9, wherein each of the series of aluminum adapters are substantially round and color coded as to the different size flask which is accommodated by its upper concave surface. 14. A reaction block according to claim 9, wherein the heat insulating material comprises a single insulating block of a plastic or resin that is substantially circular and substantially surrounds exterior side and upper surfaces of a circular inner flask holder, and the insulating block further comprises a vertical outer surface with gripping surface regions around its outer circumference. 15. A reaction block according to claim 14, wherein the single insulating block is a solid PTFE resin, the gripping surface regions further comprise at least one continuous groove, completely around its outer circumference, and the inner flask holder lower surface is circular and includes a extending edge that is adapted to engage vertically around common sizes of round hot plate stirrers. 16. A round reaction block essentially comprising a inner flask holder of heat conducting material that is surrounded by a layer of solid insulating material, wherein the inner flask further comprises a vertically extending element that is cylindrical and comprises aluminum supporting a flask holding recess above a horizontal element that comprises thin wall aluminum and is circular with a lower surface and vertical edge that will engage upon and around a common round hot plate stirrer, and the solid insulating layer is spaced from upper and side surfaces of the inner flask holder so as to define interconnected air spaces. 17. A reaction block according to claim 16, wherein the solid insulating material comprises a PTFE resin.