Inventors:
Curt McFadden - Dubuque IA, US
Kenneth David Hermsen - Dubuque IA, US
Roger W. Earle - Dubuque IA, US
James R. Edwards - Dubuque IA, US
Kerry W. Leppert - Dubuque IA, US
Eric Jackson - Dubuque IA, US
Eric Garz - Platteville WI, US
Mark Lockwood - Dubuque IA, US
John L. Meek - Rock Hill SC, US
Assignee:
Barnstead/Thermolyne Corporation - Marietta OH
International Classification:
H05B 1/02
US Classification:
219494, 219506, 2194451, 99348, 2411012
Abstract:
A stirring hot plate for simultaneously heating and stirring a mixture includes a phase controlled motor that spins magnets which couple to, and thereby spin, a stir bar within the mixture. In addition to spinning the magnets, the motor includes an operational mode in which the motor is rapidly braked thereby quickly spinning down the stir bar. The stirring hot plate also includes a visual indicator to the user that the platform is hot-to-the-touch that is especially effective when the stirring hot plate is not in use.