Liquid heating vessels
AssigneeStrix Limited
InventorsMichael James Scott, Iain Fenna, Alan Michael George Meeks
Life of this patent
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Abstract
A liquid heating vessel comprising heating means for heating liquid in the vessel, electronic control means, electromagnetic switching means for interrupting or reducing power to the heating means, and temperature sensing means for providing a signal dependent on the temperature of liquid in the vessel to the control means. The control means is arranged to operate the electromagnetic switching means to interrupt or reduce power to the heating means in response to the control means determining that a pre-determined temperature condition has been reached.
Claims33
A liquid heating vessel comprising heating means for heating liquid in the vessel:
- provided on the underside of the base of the vessel, electronic control means, electromagnetic switching means for interrupting or reducing power to the heating means, and temperature sensing means for providing a signal dependent on the temperature of liquid in the vessel to the control means, the control means being arranged to operate the electromagnetic switching means to interrupt or reduce power to the heating means in response to the control means determining that a pre-determined temperature condition has been reached.
An assembly for a liquid heating vessel comprising:
- a first heater for heating liquid in the vessel and a second heater of lower power than the first;
- the assembly further comprising a control arrangement including electromagnetic switching means for interrupting or reducing the power to the first heating means and comprising a coil for effecting said switching;
- wherein the second heater is connected electrically in series with said coil.
An electromagnetic switching arrangement for controlling the supply of electrical power to heating means of a liquid heating vessel, including switching means comprising a coil arranged to hold a pair of contacts closed when a predetermined current passes therethrough;
- wherein the contacts are arranged to open upon the current being interrupted or reduced but wherein the contacts are not re-closed when current through the coil is restored.
Dependencies are inferred from the claim text.