Temperature-controlled laboratory beaker comprising a heating el

Details Temperature-controlled laboratory beaker comprising a heating el Temperature-controlled laboratory beaker comprising a heating el

1992-02-20

1993-12-14

Bartis, Anthony

Electric resistance heating devices

Heating devices

Tank or container type liquid heater

219436, 219438, 219442, 219535, 392458, H05B 102, H05B 300, A47G 1900

Patent

active

052710858

ABSTRACT:
A temperature-controlled laboratory heating apparatus consisting of a flexible electrical heater wrapped around the exterior surface of a conventional glass or metal beaker and permanently encased within a rubber molding forming an insulating ring around it. The heater is electrically connected to a power source through an integrated-circuit temperature control panel. A thermistor is mounted against the outside surface of the beaker within the rubber molding and is connected to the control panel to regulate the flow of current through the electrical heater to reach and maintain the temperature set by the user. In one embodiment of the invention, the current through the heater is automatically regulated to optimize the time required to heat the liquid in the beaker to the desired temperature and to then deliver trickle currents, as needed, to minimize fluctuations from the set-point.

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"Thermofoil Heater Kit", Bulletin TF-2, Model HK-913 Minco Products Inc. Minneapolis, Minn.

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